1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Procedures for interfacing to Open Firmware.
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
14 /* we cannot use FORTIFY as it brings in new symbols */
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/threads.h>
22 #include <linux/spinlock.h>
23 #include <linux/types.h>
24 #include <linux/pci.h>
25 #include <linux/proc_fs.h>
26 #include <linux/delay.h>
27 #include <linux/initrd.h>
28 #include <linux/bitops.h>
32 #include <asm/processor.h>
37 #include <linux/pgtable.h>
38 #include <asm/iommu.h>
39 #include <asm/btext.h>
40 #include <asm/sections.h>
41 #include <asm/machdep.h>
42 #include <asm/asm-prototypes.h>
43 #include <asm/ultravisor-api.h>
45 #include <linux/linux_logo.h>
47 /* All of prom_init bss lives here */
48 #define __prombss __section(.bss.prominit)
51 * Eventually bump that one up
53 #define DEVTREE_CHUNK_SIZE 0x100000
56 * This is the size of the local memory reserve map that gets copied
57 * into the boot params passed to the kernel. That size is totally
58 * flexible as the kernel just reads the list until it encounters an
59 * entry with size 0, so it can be changed without breaking binary
62 #define MEM_RESERVE_MAP_SIZE 8
65 * prom_init() is called very early on, before the kernel text
66 * and data have been mapped to KERNELBASE. At this point the code
67 * is running at whatever address it has been loaded at.
68 * On ppc32 we compile with -mrelocatable, which means that references
69 * to extern and static variables get relocated automatically.
70 * ppc64 objects are always relocatable, we just need to relocate the
73 * Because OF may have mapped I/O devices into the area starting at
74 * KERNELBASE, particularly on CHRP machines, we can't safely call
75 * OF once the kernel has been mapped to KERNELBASE. Therefore all
76 * OF calls must be done within prom_init().
78 * ADDR is used in calls to call_prom. The 4th and following
79 * arguments to call_prom should be 32-bit values.
80 * On ppc64, 64 bit values are truncated to 32 bits (and
81 * fortunately don't get interpreted as two arguments).
83 #define ADDR(x) (u32)(unsigned long)(x)
86 #define OF_WORKAROUNDS 0
88 #define OF_WORKAROUNDS of_workarounds
89 static int of_workarounds __prombss;
92 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
93 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
95 #define PROM_BUG() do { \
96 prom_printf("kernel BUG at %s line 0x%x!\n", \
97 __FILE__, __LINE__); \
102 #define prom_debug(x...) prom_printf(x)
104 #define prom_debug(x...) do { } while (0)
108 typedef u32 prom_arg_t;
126 struct mem_map_entry {
131 typedef __be32 cell_t;
133 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
134 unsigned long r6, unsigned long r7, unsigned long r8,
138 extern int enter_prom(struct prom_args *args, unsigned long entry);
140 static inline int enter_prom(struct prom_args *args, unsigned long entry)
142 return ((int (*)(struct prom_args *))entry)(args);
146 extern void copy_and_flush(unsigned long dest, unsigned long src,
147 unsigned long size, unsigned long offset);
150 static struct prom_t __prombss prom;
152 static unsigned long __prombss prom_entry;
154 static char __prombss of_stdout_device[256];
155 static char __prombss prom_scratch[256];
157 static unsigned long __prombss dt_header_start;
158 static unsigned long __prombss dt_struct_start, dt_struct_end;
159 static unsigned long __prombss dt_string_start, dt_string_end;
161 static unsigned long __prombss prom_initrd_start, prom_initrd_end;
164 static int __prombss prom_iommu_force_on;
165 static int __prombss prom_iommu_off;
166 static unsigned long __prombss prom_tce_alloc_start;
167 static unsigned long __prombss prom_tce_alloc_end;
170 #ifdef CONFIG_PPC_PSERIES
171 static bool __prombss prom_radix_disable;
172 static bool __prombss prom_xive_disable;
175 #ifdef CONFIG_PPC_SVM
176 static bool __prombss prom_svm_enable;
179 struct platform_support {
186 /* Platforms codes are now obsolete in the kernel. Now only used within this
187 * file and ultimately gone too. Feel free to change them if you need, they
188 * are not shared with anything outside of this file anymore
190 #define PLATFORM_PSERIES 0x0100
191 #define PLATFORM_PSERIES_LPAR 0x0101
192 #define PLATFORM_LPAR 0x0001
193 #define PLATFORM_POWERMAC 0x0400
194 #define PLATFORM_GENERIC 0x0500
196 static int __prombss of_platform;
198 static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
200 static unsigned long __prombss prom_memory_limit;
202 static unsigned long __prombss alloc_top;
203 static unsigned long __prombss alloc_top_high;
204 static unsigned long __prombss alloc_bottom;
205 static unsigned long __prombss rmo_top;
206 static unsigned long __prombss ram_top;
208 static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
209 static int __prombss mem_reserve_cnt;
211 static cell_t __prombss regbuf[1024];
213 static bool __prombss rtas_has_query_cpu_stopped;
217 * Error results ... some OF calls will return "-1" on error, some
218 * will return 0, some will return either. To simplify, here are
219 * macros to use with any ihandle or phandle return value to check if
223 #define PROM_ERROR (-1u)
224 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
225 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
227 /* Copied from lib/string.c and lib/kstrtox.c */
229 static int __init prom_strcmp(const char *cs, const char *ct)
231 unsigned char c1, c2;
237 return c1 < c2 ? -1 : 1;
244 static char __init *prom_strcpy(char *dest, const char *src)
248 while ((*dest++ = *src++) != '\0')
253 static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
255 unsigned char c1, c2;
261 return c1 < c2 ? -1 : 1;
269 static size_t __init prom_strlen(const char *s)
273 for (sc = s; *sc != '\0'; ++sc)
278 static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
280 const unsigned char *su1, *su2;
283 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
284 if ((res = *su1 - *su2) != 0)
289 static char __init *prom_strstr(const char *s1, const char *s2)
293 l2 = prom_strlen(s2);
296 l1 = prom_strlen(s1);
299 if (!prom_memcmp(s1, s2, l2))
306 static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
308 size_t dsize = prom_strlen(dest);
309 size_t len = prom_strlen(src);
310 size_t res = dsize + len;
312 /* This would be a bug */
320 memcpy(dest, src, len);
326 #ifdef CONFIG_PPC_PSERIES
327 static int __init prom_strtobool(const char *s, bool *res)
365 /* This is the one and *ONLY* place where we actually call open
369 static int __init call_prom(const char *service, int nargs, int nret, ...)
372 struct prom_args args;
375 args.service = cpu_to_be32(ADDR(service));
376 args.nargs = cpu_to_be32(nargs);
377 args.nret = cpu_to_be32(nret);
379 va_start(list, nret);
380 for (i = 0; i < nargs; i++)
381 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
384 for (i = 0; i < nret; i++)
385 args.args[nargs+i] = 0;
387 if (enter_prom(&args, prom_entry) < 0)
390 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
393 static int __init call_prom_ret(const char *service, int nargs, int nret,
394 prom_arg_t *rets, ...)
397 struct prom_args args;
400 args.service = cpu_to_be32(ADDR(service));
401 args.nargs = cpu_to_be32(nargs);
402 args.nret = cpu_to_be32(nret);
404 va_start(list, rets);
405 for (i = 0; i < nargs; i++)
406 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
409 for (i = 0; i < nret; i++)
410 args.args[nargs+i] = 0;
412 if (enter_prom(&args, prom_entry) < 0)
416 for (i = 1; i < nret; ++i)
417 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
419 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
423 static void __init prom_print(const char *msg)
427 if (prom.stdout == 0)
430 for (p = msg; *p != 0; p = q) {
431 for (q = p; *q != 0 && *q != '\n'; ++q)
434 call_prom("write", 3, 1, prom.stdout, p, q - p);
438 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
444 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
445 * we do not need __udivdi3 or __umoddi3 on 32bits.
447 static void __init prom_print_hex(unsigned long val)
449 int i, nibbles = sizeof(val)*2;
450 char buf[sizeof(val)*2+1];
452 for (i = nibbles-1; i >= 0; i--) {
453 buf[i] = (val & 0xf) + '0';
455 buf[i] += ('a'-'0'-10);
459 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
462 /* max number of decimal digits in an unsigned long */
464 static void __init prom_print_dec(unsigned long val)
467 char buf[UL_DIGITS+1];
469 for (i = UL_DIGITS-1; i >= 0; i--) {
470 buf[i] = (val % 10) + '0';
475 /* shift stuff down */
476 size = UL_DIGITS - i;
477 call_prom("write", 3, 1, prom.stdout, buf+i, size);
481 static void __init prom_printf(const char *format, ...)
483 const char *p, *q, *s;
489 va_start(args, format);
490 for (p = format; *p != 0; p = q) {
491 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
494 call_prom("write", 3, 1, prom.stdout, p, q - p);
499 call_prom("write", 3, 1, prom.stdout,
513 s = va_arg(args, const char *);
520 v = va_arg(args, unsigned int);
523 v = va_arg(args, unsigned long);
527 v = va_arg(args, unsigned long long);
536 v = va_arg(args, unsigned int);
539 v = va_arg(args, unsigned long);
543 v = va_arg(args, unsigned long long);
552 vs = va_arg(args, int);
555 vs = va_arg(args, long);
559 vs = va_arg(args, long long);
574 static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
578 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
580 * Old OF requires we claim physical and virtual separately
581 * and then map explicitly (assuming virtual mode)
586 ret = call_prom_ret("call-method", 5, 2, &result,
587 ADDR("claim"), prom.memory,
589 if (ret != 0 || result == -1)
591 ret = call_prom_ret("call-method", 5, 2, &result,
592 ADDR("claim"), prom.mmumap,
595 call_prom("call-method", 4, 1, ADDR("release"),
596 prom.memory, size, virt);
599 /* the 0x12 is M (coherence) + PP == read/write */
600 call_prom("call-method", 6, 1,
601 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
604 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
608 static void __init __attribute__((noreturn)) prom_panic(const char *reason)
611 /* Do not call exit because it clears the screen on pmac
612 * it also causes some sort of double-fault on early pmacs */
613 if (of_platform == PLATFORM_POWERMAC)
616 /* ToDo: should put up an SRC here on pSeries */
617 call_prom("exit", 0, 0);
619 for (;;) /* should never get here */
624 static int __init prom_next_node(phandle *nodep)
628 if ((node = *nodep) != 0
629 && (*nodep = call_prom("child", 1, 1, node)) != 0)
631 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
634 if ((node = call_prom("parent", 1, 1, node)) == 0)
636 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
641 static inline int __init prom_getprop(phandle node, const char *pname,
642 void *value, size_t valuelen)
644 return call_prom("getprop", 4, 1, node, ADDR(pname),
645 (u32)(unsigned long) value, (u32) valuelen);
648 static inline int __init prom_getproplen(phandle node, const char *pname)
650 return call_prom("getproplen", 2, 1, node, ADDR(pname));
653 static void add_string(char **str, const char *q)
663 static char *tohex(unsigned int x)
665 static const char digits[] __initconst = "0123456789abcdef";
666 static char result[9] __prombss;
673 result[i] = digits[x & 0xf];
675 } while (x != 0 && i > 0);
679 static int __init prom_setprop(phandle node, const char *nodename,
680 const char *pname, void *value, size_t valuelen)
684 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
685 return call_prom("setprop", 4, 1, node, ADDR(pname),
686 (u32)(unsigned long) value, (u32) valuelen);
688 /* gah... setprop doesn't work on longtrail, have to use interpret */
690 add_string(&p, "dev");
691 add_string(&p, nodename);
692 add_string(&p, tohex((u32)(unsigned long) value));
693 add_string(&p, tohex(valuelen));
694 add_string(&p, tohex(ADDR(pname)));
695 add_string(&p, tohex(prom_strlen(pname)));
696 add_string(&p, "property");
698 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
701 /* We can't use the standard versions because of relocation headaches. */
702 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \
703 || ('a' <= (c) && (c) <= 'f') \
704 || ('A' <= (c) && (c) <= 'F'))
706 #define isdigit(c) ('0' <= (c) && (c) <= '9')
707 #define islower(c) ('a' <= (c) && (c) <= 'z')
708 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
710 static unsigned long prom_strtoul(const char *cp, const char **endp)
712 unsigned long result = 0, base = 10, value;
717 if (toupper(*cp) == 'X') {
723 while (isxdigit(*cp) &&
724 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
725 result = result * base + value;
735 static unsigned long prom_memparse(const char *ptr, const char **retptr)
737 unsigned long ret = prom_strtoul(ptr, retptr);
741 * We can't use a switch here because GCC *may* generate a
742 * jump table which won't work, because we're not running at
743 * the address we're linked at.
745 if ('G' == **retptr || 'g' == **retptr)
748 if ('M' == **retptr || 'm' == **retptr)
751 if ('K' == **retptr || 'k' == **retptr)
763 * Early parsing of the command line passed to the kernel, used for
764 * "mem=x" and the options that affect the iommu
766 static void __init early_cmdline_parse(void)
773 prom_cmd_line[0] = 0;
776 if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
777 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
779 if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
780 prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
781 sizeof(prom_cmd_line));
783 prom_printf("command line: %s\n", prom_cmd_line);
786 opt = prom_strstr(prom_cmd_line, "iommu=");
788 prom_printf("iommu opt is: %s\n", opt);
790 while (*opt && *opt == ' ')
792 if (!prom_strncmp(opt, "off", 3))
794 else if (!prom_strncmp(opt, "force", 5))
795 prom_iommu_force_on = 1;
798 opt = prom_strstr(prom_cmd_line, "mem=");
801 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
803 /* Align to 16 MB == size of ppc64 large page */
804 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
808 #ifdef CONFIG_PPC_PSERIES
809 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
810 opt = prom_strstr(prom_cmd_line, "disable_radix");
813 if (*opt && *opt == '=') {
816 if (prom_strtobool(++opt, &val))
817 prom_radix_disable = false;
819 prom_radix_disable = val;
821 prom_radix_disable = true;
823 if (prom_radix_disable)
824 prom_debug("Radix disabled from cmdline\n");
826 opt = prom_strstr(prom_cmd_line, "xive=off");
828 prom_xive_disable = true;
829 prom_debug("XIVE disabled from cmdline\n");
831 #endif /* CONFIG_PPC_PSERIES */
833 #ifdef CONFIG_PPC_SVM
834 opt = prom_strstr(prom_cmd_line, "svm=");
838 opt += sizeof("svm=") - 1;
839 if (!prom_strtobool(opt, &val))
840 prom_svm_enable = val;
842 #endif /* CONFIG_PPC_SVM */
845 #ifdef CONFIG_PPC_PSERIES
847 * The architecture vector has an array of PVR mask/value pairs,
848 * followed by # option vectors - 1, followed by the option vectors.
850 * See prom.h for the definition of the bits specified in the
851 * architecture vector.
854 /* Firmware expects the value to be n - 1, where n is the # of vectors */
855 #define NUM_VECTORS(n) ((n) - 1)
858 * Firmware expects 1 + n - 2, where n is the length of the option vector in
859 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
861 #define VECTOR_LENGTH(n) (1 + (n) - 2)
863 struct option_vector1 {
869 struct option_vector2 {
883 struct option_vector3 {
888 struct option_vector4 {
893 struct option_vector5 {
905 u8 platform_facilities;
916 struct option_vector6 {
922 struct ibm_arch_vec {
923 struct { u32 mask, val; } pvrs[14];
928 struct option_vector1 vec1;
931 struct option_vector2 vec2;
934 struct option_vector3 vec3;
937 struct option_vector4 vec4;
940 struct option_vector5 vec5;
943 struct option_vector6 vec6;
946 static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
949 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
950 .val = cpu_to_be32(0x003a0000),
953 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
954 .val = cpu_to_be32(0x003e0000),
957 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
958 .val = cpu_to_be32(0x003f0000),
961 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
962 .val = cpu_to_be32(0x004b0000),
965 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
966 .val = cpu_to_be32(0x004c0000),
969 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
970 .val = cpu_to_be32(0x004d0000),
973 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
974 .val = cpu_to_be32(0x004e0000),
977 .mask = cpu_to_be32(0xffff0000), /* POWER10 */
978 .val = cpu_to_be32(0x00800000),
981 .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
982 .val = cpu_to_be32(0x0f000006),
985 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
986 .val = cpu_to_be32(0x0f000005),
989 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
990 .val = cpu_to_be32(0x0f000004),
993 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
994 .val = cpu_to_be32(0x0f000003),
997 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
998 .val = cpu_to_be32(0x0f000002),
1001 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
1002 .val = cpu_to_be32(0x0f000001),
1006 .num_vectors = NUM_VECTORS(6),
1008 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
1011 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
1012 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
1013 .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
1016 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
1017 /* option vector 2: Open Firmware options supported */
1019 .byte1 = OV2_REAL_MODE,
1021 .real_base = cpu_to_be32(0xffffffff),
1022 .real_size = cpu_to_be32(0xffffffff),
1023 .virt_base = cpu_to_be32(0xffffffff),
1024 .virt_size = cpu_to_be32(0xffffffff),
1025 .load_base = cpu_to_be32(0xffffffff),
1026 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1027 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1028 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1029 .max_pft_size = 48, /* max log_2(hash table size) */
1032 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1033 /* option vector 3: processor options supported */
1035 .byte1 = 0, /* don't ignore, don't halt */
1036 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1039 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1040 /* option vector 4: IBM PAPR implementation */
1042 .byte1 = 0, /* don't halt */
1043 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1046 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1047 /* option vector 5: PAPR/OF options */
1049 .byte1 = 0, /* don't ignore, don't halt */
1050 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1051 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1052 #ifdef CONFIG_PCI_MSI
1053 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1060 #ifdef CONFIG_PPC_SMLPAR
1061 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1065 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
1066 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1067 .micro_checkpoint = 0,
1069 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1072 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1076 .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
1083 /* option vector 6: IBM PAPR hints */
1084 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1087 .secondary_pteg = 0,
1088 .os_name = OV6_LINUX,
1092 static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1094 /* Old method - ELF header with PT_NOTE sections only works on BE */
1095 #ifdef __BIG_ENDIAN__
1096 static const struct fake_elf {
1103 char name[8]; /* "PowerPC" */
1117 char name[24]; /* "IBM,RPA-Client-Config" */
1121 u32 min_rmo_percent;
1129 } fake_elf __initconst = {
1131 .e_ident = { 0x7f, 'E', 'L', 'F',
1132 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1133 .e_type = ET_EXEC, /* yeah right */
1134 .e_machine = EM_PPC,
1135 .e_version = EV_CURRENT,
1136 .e_phoff = offsetof(struct fake_elf, phdr),
1137 .e_phentsize = sizeof(Elf32_Phdr),
1143 .p_offset = offsetof(struct fake_elf, chrpnote),
1144 .p_filesz = sizeof(struct chrpnote)
1147 .p_offset = offsetof(struct fake_elf, rpanote),
1148 .p_filesz = sizeof(struct rpanote)
1152 .namesz = sizeof("PowerPC"),
1153 .descsz = sizeof(struct chrpdesc),
1157 .real_mode = ~0U, /* ~0 means "don't care" */
1166 .namesz = sizeof("IBM,RPA-Client-Config"),
1167 .descsz = sizeof(struct rpadesc),
1169 .name = "IBM,RPA-Client-Config",
1172 .min_rmo_size = 64, /* in megabytes */
1173 .min_rmo_percent = 0,
1174 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1181 #endif /* __BIG_ENDIAN__ */
1183 static int __init prom_count_smt_threads(void)
1189 /* Pick up th first CPU node we can find */
1190 for (node = 0; prom_next_node(&node); ) {
1192 prom_getprop(node, "device_type", type, sizeof(type));
1194 if (prom_strcmp(type, "cpu"))
1197 * There is an entry for each smt thread, each entry being
1198 * 4 bytes long. All cpus should have the same number of
1199 * smt threads, so return after finding the first.
1201 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1202 if (plen == PROM_ERROR)
1205 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1208 if (plen < 1 || plen > 64) {
1209 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1210 (unsigned long)plen);
1215 prom_debug("No threads found, assuming 1 per core\n");
1221 static void __init prom_parse_mmu_model(u8 val,
1222 struct platform_support *support)
1225 case OV5_FEAT(OV5_MMU_DYNAMIC):
1226 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1227 prom_debug("MMU - either supported\n");
1228 support->radix_mmu = !prom_radix_disable;
1229 support->hash_mmu = true;
1231 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1232 prom_debug("MMU - radix only\n");
1233 if (prom_radix_disable) {
1235 * If we __have__ to do radix, we're better off ignoring
1236 * the command line rather than not booting.
1238 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1240 support->radix_mmu = true;
1242 case OV5_FEAT(OV5_MMU_HASH):
1243 prom_debug("MMU - hash only\n");
1244 support->hash_mmu = true;
1247 prom_debug("Unknown mmu support option: 0x%x\n", val);
1252 static void __init prom_parse_xive_model(u8 val,
1253 struct platform_support *support)
1256 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1257 prom_debug("XIVE - either mode supported\n");
1258 support->xive = !prom_xive_disable;
1260 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1261 prom_debug("XIVE - exploitation mode supported\n");
1262 if (prom_xive_disable) {
1264 * If we __have__ to do XIVE, we're better off ignoring
1265 * the command line rather than not booting.
1267 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1269 support->xive = true;
1271 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1272 prom_debug("XIVE - legacy mode supported\n");
1275 prom_debug("Unknown xive support option: 0x%x\n", val);
1280 static void __init prom_parse_platform_support(u8 index, u8 val,
1281 struct platform_support *support)
1284 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1285 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1287 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1288 if (val & OV5_FEAT(OV5_RADIX_GTSE)) {
1289 prom_debug("Radix - GTSE supported\n");
1290 support->radix_gtse = true;
1293 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1294 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1300 static void __init prom_check_platform_support(void)
1302 struct platform_support supported = {
1305 .radix_gtse = false,
1308 int prop_len = prom_getproplen(prom.chosen,
1309 "ibm,arch-vec-5-platform-support");
1312 * First copy the architecture vec template
1314 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1315 * by __memcpy() when KASAN is active
1317 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1318 sizeof(ibm_architecture_vec));
1323 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1325 if (prop_len > sizeof(vec))
1326 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1328 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
1330 for (i = 0; i < sizeof(vec); i += 2) {
1331 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
1334 prom_parse_platform_support(vec[i], vec[i + 1],
1339 if (supported.radix_mmu && supported.radix_gtse &&
1340 IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1341 /* Radix preferred - but we require GTSE for now */
1342 prom_debug("Asking for radix with GTSE\n");
1343 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1344 ibm_architecture_vec.vec5.radix_ext = OV5_FEAT(OV5_RADIX_GTSE);
1345 } else if (supported.hash_mmu) {
1346 /* Default to hash mmu (if we can) */
1347 prom_debug("Asking for hash\n");
1348 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1350 /* We're probably on a legacy hypervisor */
1351 prom_debug("Assuming legacy hash support\n");
1354 if (supported.xive) {
1355 prom_debug("Asking for XIVE\n");
1356 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1360 static void __init prom_send_capabilities(void)
1366 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1367 prom_check_platform_support();
1369 root = call_prom("open", 1, 1, ADDR("/"));
1371 /* We need to tell the FW about the number of cores we support.
1373 * To do that, we count the number of threads on the first core
1374 * (we assume this is the same for all cores) and use it to
1378 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1379 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1382 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1384 /* try calling the ibm,client-architecture-support method */
1385 prom_printf("Calling ibm,client-architecture-support...");
1386 if (call_prom_ret("call-method", 3, 2, &ret,
1387 ADDR("ibm,client-architecture-support"),
1389 ADDR(&ibm_architecture_vec)) == 0) {
1390 /* the call exists... */
1392 prom_printf("\nWARNING: ibm,client-architecture"
1393 "-support call FAILED!\n");
1394 call_prom("close", 1, 0, root);
1395 prom_printf(" done\n");
1398 call_prom("close", 1, 0, root);
1399 prom_printf(" not implemented\n");
1402 #ifdef __BIG_ENDIAN__
1406 /* no ibm,client-architecture-support call, try the old way */
1407 elfloader = call_prom("open", 1, 1,
1408 ADDR("/packages/elf-loader"));
1409 if (elfloader == 0) {
1410 prom_printf("couldn't open /packages/elf-loader\n");
1413 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1414 elfloader, ADDR(&fake_elf));
1415 call_prom("close", 1, 0, elfloader);
1417 #endif /* __BIG_ENDIAN__ */
1419 #endif /* CONFIG_PPC_PSERIES */
1422 * Memory allocation strategy... our layout is normally:
1424 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1425 * rare cases, initrd might end up being before the kernel though.
1426 * We assume this won't override the final kernel at 0, we have no
1427 * provision to handle that in this version, but it should hopefully
1430 * alloc_top is set to the top of RMO, eventually shrink down if the
1433 * alloc_bottom is set to the top of kernel/initrd
1435 * from there, allocations are done this way : rtas is allocated
1436 * topmost, and the device-tree is allocated from the bottom. We try
1437 * to grow the device-tree allocation as we progress. If we can't,
1438 * then we fail, we don't currently have a facility to restart
1439 * elsewhere, but that shouldn't be necessary.
1441 * Note that calls to reserve_mem have to be done explicitly, memory
1442 * allocated with either alloc_up or alloc_down isn't automatically
1448 * Allocates memory in the RMO upward from the kernel/initrd
1450 * When align is 0, this is a special case, it means to allocate in place
1451 * at the current location of alloc_bottom or fail (that is basically
1452 * extending the previous allocation). Used for the device-tree flattening
1454 static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1456 unsigned long base = alloc_bottom;
1457 unsigned long addr = 0;
1460 base = ALIGN(base, align);
1461 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1463 prom_panic("alloc_up() called with mem not initialized\n");
1466 base = ALIGN(alloc_bottom, align);
1468 base = alloc_bottom;
1470 for(; (base + size) <= alloc_top;
1471 base = ALIGN(base + 0x100000, align)) {
1472 prom_debug(" trying: 0x%lx\n\r", base);
1473 addr = (unsigned long)prom_claim(base, size, 0);
1474 if (addr != PROM_ERROR && addr != 0)
1482 alloc_bottom = addr + size;
1484 prom_debug(" -> %lx\n", addr);
1485 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1486 prom_debug(" alloc_top : %lx\n", alloc_top);
1487 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1488 prom_debug(" rmo_top : %lx\n", rmo_top);
1489 prom_debug(" ram_top : %lx\n", ram_top);
1495 * Allocates memory downward, either from top of RMO, or if highmem
1496 * is set, from the top of RAM. Note that this one doesn't handle
1497 * failures. It does claim memory if highmem is not set.
1499 static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1502 unsigned long base, addr = 0;
1504 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1505 highmem ? "(high)" : "(low)");
1507 prom_panic("alloc_down() called with mem not initialized\n");
1510 /* Carve out storage for the TCE table. */
1511 addr = ALIGN_DOWN(alloc_top_high - size, align);
1512 if (addr <= alloc_bottom)
1514 /* Will we bump into the RMO ? If yes, check out that we
1515 * didn't overlap existing allocations there, if we did,
1516 * we are dead, we must be the first in town !
1518 if (addr < rmo_top) {
1519 /* Good, we are first */
1520 if (alloc_top == rmo_top)
1521 alloc_top = rmo_top = addr;
1525 alloc_top_high = addr;
1529 base = ALIGN_DOWN(alloc_top - size, align);
1530 for (; base > alloc_bottom;
1531 base = ALIGN_DOWN(base - 0x100000, align)) {
1532 prom_debug(" trying: 0x%lx\n\r", base);
1533 addr = (unsigned long)prom_claim(base, size, 0);
1534 if (addr != PROM_ERROR && addr != 0)
1543 prom_debug(" -> %lx\n", addr);
1544 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1545 prom_debug(" alloc_top : %lx\n", alloc_top);
1546 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1547 prom_debug(" rmo_top : %lx\n", rmo_top);
1548 prom_debug(" ram_top : %lx\n", ram_top);
1554 * Parse a "reg" cell
1556 static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1559 unsigned long r = 0;
1561 /* Ignore more than 2 cells */
1562 while (s > sizeof(unsigned long) / 4) {
1566 r = be32_to_cpu(*p++);
1570 r |= be32_to_cpu(*(p++));
1578 * Very dumb function for adding to the memory reserve list, but
1579 * we don't need anything smarter at this point
1581 * XXX Eventually check for collisions. They should NEVER happen.
1582 * If problems seem to show up, it would be a good start to track
1585 static void __init reserve_mem(u64 base, u64 size)
1587 u64 top = base + size;
1588 unsigned long cnt = mem_reserve_cnt;
1593 /* We need to always keep one empty entry so that we
1594 * have our terminator with "size" set to 0 since we are
1595 * dumb and just copy this entire array to the boot params
1597 base = ALIGN_DOWN(base, PAGE_SIZE);
1598 top = ALIGN(top, PAGE_SIZE);
1601 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1602 prom_panic("Memory reserve map exhausted !\n");
1603 mem_reserve_map[cnt].base = cpu_to_be64(base);
1604 mem_reserve_map[cnt].size = cpu_to_be64(size);
1605 mem_reserve_cnt = cnt + 1;
1609 * Initialize memory allocation mechanism, parse "memory" nodes and
1610 * obtain that way the top of memory and RMO to setup out local allocator
1612 static void __init prom_init_mem(void)
1622 * We iterate the memory nodes to find
1623 * 1) top of RMO (first node)
1626 val = cpu_to_be32(2);
1627 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1628 rac = be32_to_cpu(val);
1629 val = cpu_to_be32(1);
1630 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1631 rsc = be32_to_cpu(val);
1632 prom_debug("root_addr_cells: %x\n", rac);
1633 prom_debug("root_size_cells: %x\n", rsc);
1635 prom_debug("scanning memory:\n");
1637 for (node = 0; prom_next_node(&node); ) {
1639 prom_getprop(node, "device_type", type, sizeof(type));
1643 * CHRP Longtrail machines have no device_type
1644 * on the memory node, so check the name instead...
1646 prom_getprop(node, "name", type, sizeof(type));
1648 if (prom_strcmp(type, "memory"))
1651 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1652 if (plen > sizeof(regbuf)) {
1653 prom_printf("memory node too large for buffer !\n");
1654 plen = sizeof(regbuf);
1657 endp = p + (plen / sizeof(cell_t));
1660 memset(prom_scratch, 0, sizeof(prom_scratch));
1661 call_prom("package-to-path", 3, 1, node, prom_scratch,
1662 sizeof(prom_scratch) - 1);
1663 prom_debug(" node %s :\n", prom_scratch);
1664 #endif /* DEBUG_PROM */
1666 while ((endp - p) >= (rac + rsc)) {
1667 unsigned long base, size;
1669 base = prom_next_cell(rac, &p);
1670 size = prom_next_cell(rsc, &p);
1674 prom_debug(" %lx %lx\n", base, size);
1675 if (base == 0 && (of_platform & PLATFORM_LPAR))
1677 if ((base + size) > ram_top)
1678 ram_top = base + size;
1682 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1685 * If prom_memory_limit is set we reduce the upper limits *except* for
1686 * alloc_top_high. This must be the real top of RAM so we can put
1690 alloc_top_high = ram_top;
1692 if (prom_memory_limit) {
1693 if (prom_memory_limit <= alloc_bottom) {
1694 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1696 prom_memory_limit = 0;
1697 } else if (prom_memory_limit >= ram_top) {
1698 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1700 prom_memory_limit = 0;
1702 ram_top = prom_memory_limit;
1703 rmo_top = min(rmo_top, prom_memory_limit);
1708 * Setup our top alloc point, that is top of RMO or top of
1709 * segment 0 when running non-LPAR.
1710 * Some RS64 machines have buggy firmware where claims up at
1711 * 1GB fail. Cap at 768MB as a workaround.
1712 * Since 768MB is plenty of room, and we need to cap to something
1713 * reasonable on 32-bit, cap at 768MB on all machines.
1717 rmo_top = min(0x30000000ul, rmo_top);
1718 alloc_top = rmo_top;
1719 alloc_top_high = ram_top;
1722 * Check if we have an initrd after the kernel but still inside
1723 * the RMO. If we do move our bottom point to after it.
1725 if (prom_initrd_start &&
1726 prom_initrd_start < rmo_top &&
1727 prom_initrd_end > alloc_bottom)
1728 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1730 prom_printf("memory layout at init:\n");
1731 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1733 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1734 prom_printf(" alloc_top : %lx\n", alloc_top);
1735 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1736 prom_printf(" rmo_top : %lx\n", rmo_top);
1737 prom_printf(" ram_top : %lx\n", ram_top);
1740 static void __init prom_close_stdin(void)
1745 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1746 stdin = be32_to_cpu(val);
1747 call_prom("close", 1, 0, stdin);
1751 #ifdef CONFIG_PPC_SVM
1752 static int prom_rtas_hcall(uint64_t args)
1754 register uint64_t arg1 asm("r3") = H_RTAS;
1755 register uint64_t arg2 asm("r4") = args;
1757 asm volatile("sc 1\n" : "=r" (arg1) :
1763 static struct rtas_args __prombss os_term_args;
1765 static void __init prom_rtas_os_term(char *str)
1771 prom_debug("%s: start...\n", __func__);
1772 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1773 prom_debug("rtas_node: %x\n", rtas_node);
1774 if (!PHANDLE_VALID(rtas_node))
1778 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1779 token = be32_to_cpu(val);
1780 prom_debug("ibm,os-term: %x\n", token);
1782 prom_panic("Could not get token for ibm,os-term\n");
1783 os_term_args.token = cpu_to_be32(token);
1784 os_term_args.nargs = cpu_to_be32(1);
1785 os_term_args.nret = cpu_to_be32(1);
1786 os_term_args.args[0] = cpu_to_be32(__pa(str));
1787 prom_rtas_hcall((uint64_t)&os_term_args);
1789 #endif /* CONFIG_PPC_SVM */
1792 * Allocate room for and instantiate RTAS
1794 static void __init prom_instantiate_rtas(void)
1798 u32 base, entry = 0;
1802 prom_debug("prom_instantiate_rtas: start...\n");
1804 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1805 prom_debug("rtas_node: %x\n", rtas_node);
1806 if (!PHANDLE_VALID(rtas_node))
1810 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1811 size = be32_to_cpu(val);
1815 base = alloc_down(size, PAGE_SIZE, 0);
1817 prom_panic("Could not allocate memory for RTAS\n");
1819 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1820 if (!IHANDLE_VALID(rtas_inst)) {
1821 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1825 prom_printf("instantiating rtas at 0x%x...", base);
1827 if (call_prom_ret("call-method", 3, 2, &entry,
1828 ADDR("instantiate-rtas"),
1829 rtas_inst, base) != 0
1831 prom_printf(" failed\n");
1834 prom_printf(" done\n");
1836 reserve_mem(base, size);
1838 val = cpu_to_be32(base);
1839 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1841 val = cpu_to_be32(entry);
1842 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1845 /* Check if it supports "query-cpu-stopped-state" */
1846 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1847 &val, sizeof(val)) != PROM_ERROR)
1848 rtas_has_query_cpu_stopped = true;
1850 prom_debug("rtas base = 0x%x\n", base);
1851 prom_debug("rtas entry = 0x%x\n", entry);
1852 prom_debug("rtas size = 0x%x\n", size);
1854 prom_debug("prom_instantiate_rtas: end...\n");
1859 * Allocate room for and instantiate Stored Measurement Log (SML)
1861 static void __init prom_instantiate_sml(void)
1863 phandle ibmvtpm_node;
1864 ihandle ibmvtpm_inst;
1865 u32 entry = 0, size = 0, succ = 0;
1869 prom_debug("prom_instantiate_sml: start...\n");
1871 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1872 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1873 if (!PHANDLE_VALID(ibmvtpm_node))
1876 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1877 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1878 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1882 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1883 &val, sizeof(val)) != PROM_ERROR) {
1884 if (call_prom_ret("call-method", 2, 2, &succ,
1885 ADDR("reformat-sml-to-efi-alignment"),
1886 ibmvtpm_inst) != 0 || succ == 0) {
1887 prom_printf("Reformat SML to EFI alignment failed\n");
1891 if (call_prom_ret("call-method", 2, 2, &size,
1892 ADDR("sml-get-allocated-size"),
1893 ibmvtpm_inst) != 0 || size == 0) {
1894 prom_printf("SML get allocated size failed\n");
1898 if (call_prom_ret("call-method", 2, 2, &size,
1899 ADDR("sml-get-handover-size"),
1900 ibmvtpm_inst) != 0 || size == 0) {
1901 prom_printf("SML get handover size failed\n");
1906 base = alloc_down(size, PAGE_SIZE, 0);
1908 prom_panic("Could not allocate memory for sml\n");
1910 prom_printf("instantiating sml at 0x%llx...", base);
1912 memset((void *)base, 0, size);
1914 if (call_prom_ret("call-method", 4, 2, &entry,
1915 ADDR("sml-handover"),
1916 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1917 prom_printf("SML handover failed\n");
1920 prom_printf(" done\n");
1922 reserve_mem(base, size);
1924 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1925 &base, sizeof(base));
1926 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1927 &size, sizeof(size));
1929 prom_debug("sml base = 0x%llx\n", base);
1930 prom_debug("sml size = 0x%x\n", size);
1932 prom_debug("prom_instantiate_sml: end...\n");
1936 * Allocate room for and initialize TCE tables
1938 #ifdef __BIG_ENDIAN__
1939 static void __init prom_initialize_tce_table(void)
1943 char compatible[64], type[64], model[64];
1944 char *path = prom_scratch;
1946 u32 minalign, minsize;
1947 u64 tce_entry, *tce_entryp;
1948 u64 local_alloc_top, local_alloc_bottom;
1954 prom_debug("starting prom_initialize_tce_table\n");
1956 /* Cache current top of allocs so we reserve a single block */
1957 local_alloc_top = alloc_top_high;
1958 local_alloc_bottom = local_alloc_top;
1960 /* Search all nodes looking for PHBs. */
1961 for (node = 0; prom_next_node(&node); ) {
1965 prom_getprop(node, "compatible",
1966 compatible, sizeof(compatible));
1967 prom_getprop(node, "device_type", type, sizeof(type));
1968 prom_getprop(node, "model", model, sizeof(model));
1970 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
1973 /* Keep the old logic intact to avoid regression. */
1974 if (compatible[0] != 0) {
1975 if ((prom_strstr(compatible, "python") == NULL) &&
1976 (prom_strstr(compatible, "Speedwagon") == NULL) &&
1977 (prom_strstr(compatible, "Winnipeg") == NULL))
1979 } else if (model[0] != 0) {
1980 if ((prom_strstr(model, "ython") == NULL) &&
1981 (prom_strstr(model, "peedwagon") == NULL) &&
1982 (prom_strstr(model, "innipeg") == NULL))
1986 if (prom_getprop(node, "tce-table-minalign", &minalign,
1987 sizeof(minalign)) == PROM_ERROR)
1989 if (prom_getprop(node, "tce-table-minsize", &minsize,
1990 sizeof(minsize)) == PROM_ERROR)
1991 minsize = 4UL << 20;
1994 * Even though we read what OF wants, we just set the table
1995 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1996 * By doing this, we avoid the pitfalls of trying to DMA to
1997 * MMIO space and the DMA alias hole.
1999 minsize = 4UL << 20;
2001 /* Align to the greater of the align or size */
2002 align = max(minalign, minsize);
2003 base = alloc_down(minsize, align, 1);
2005 prom_panic("ERROR, cannot find space for TCE table.\n");
2006 if (base < local_alloc_bottom)
2007 local_alloc_bottom = base;
2009 /* It seems OF doesn't null-terminate the path :-( */
2010 memset(path, 0, sizeof(prom_scratch));
2011 /* Call OF to setup the TCE hardware */
2012 if (call_prom("package-to-path", 3, 1, node,
2013 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
2014 prom_printf("package-to-path failed\n");
2017 /* Save away the TCE table attributes for later use. */
2018 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
2019 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
2021 prom_debug("TCE table: %s\n", path);
2022 prom_debug("\tnode = 0x%x\n", node);
2023 prom_debug("\tbase = 0x%llx\n", base);
2024 prom_debug("\tsize = 0x%x\n", minsize);
2026 /* Initialize the table to have a one-to-one mapping
2027 * over the allocated size.
2029 tce_entryp = (u64 *)base;
2030 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2031 tce_entry = (i << PAGE_SHIFT);
2033 *tce_entryp = tce_entry;
2036 prom_printf("opening PHB %s", path);
2037 phb_node = call_prom("open", 1, 1, path);
2039 prom_printf("... failed\n");
2041 prom_printf("... done\n");
2043 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2044 phb_node, -1, minsize,
2045 (u32) base, (u32) (base >> 32));
2046 call_prom("close", 1, 0, phb_node);
2049 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2051 /* These are only really needed if there is a memory limit in
2052 * effect, but we don't know so export them always. */
2053 prom_tce_alloc_start = local_alloc_bottom;
2054 prom_tce_alloc_end = local_alloc_top;
2056 /* Flag the first invalid entry */
2057 prom_debug("ending prom_initialize_tce_table\n");
2059 #endif /* __BIG_ENDIAN__ */
2060 #endif /* CONFIG_PPC64 */
2063 * With CHRP SMP we need to use the OF to start the other processors.
2064 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2065 * so we have to put the processors into a holding pattern controlled
2066 * by the kernel (not OF) before we destroy the OF.
2068 * This uses a chunk of low memory, puts some holding pattern
2069 * code there and sends the other processors off to there until
2070 * smp_boot_cpus tells them to do something. The holding pattern
2071 * checks that address until its cpu # is there, when it is that
2072 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2073 * of setting those values.
2075 * We also use physical address 0x4 here to tell when a cpu
2076 * is in its holding pattern code.
2081 * We want to reference the copy of __secondary_hold_* in the
2082 * 0 - 0x100 address range
2084 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2086 static void __init prom_hold_cpus(void)
2091 unsigned long *spinloop
2092 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2093 unsigned long *acknowledge
2094 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2095 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2098 * On pseries, if RTAS supports "query-cpu-stopped-state",
2099 * we skip this stage, the CPUs will be started by the
2100 * kernel using RTAS.
2102 if ((of_platform == PLATFORM_PSERIES ||
2103 of_platform == PLATFORM_PSERIES_LPAR) &&
2104 rtas_has_query_cpu_stopped) {
2105 prom_printf("prom_hold_cpus: skipped\n");
2109 prom_debug("prom_hold_cpus: start...\n");
2110 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2111 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2112 prom_debug(" 1) acknowledge = 0x%lx\n",
2113 (unsigned long)acknowledge);
2114 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2115 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2117 /* Set the common spinloop variable, so all of the secondary cpus
2118 * will block when they are awakened from their OF spinloop.
2119 * This must occur for both SMP and non SMP kernels, since OF will
2120 * be trashed when we move the kernel.
2125 for (node = 0; prom_next_node(&node); ) {
2126 unsigned int cpu_no;
2130 prom_getprop(node, "device_type", type, sizeof(type));
2131 if (prom_strcmp(type, "cpu") != 0)
2134 /* Skip non-configured cpus. */
2135 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2136 if (prom_strcmp(type, "okay") != 0)
2139 reg = cpu_to_be32(-1); /* make sparse happy */
2140 prom_getprop(node, "reg", ®, sizeof(reg));
2141 cpu_no = be32_to_cpu(reg);
2143 prom_debug("cpu hw idx = %u\n", cpu_no);
2145 /* Init the acknowledge var which will be reset by
2146 * the secondary cpu when it awakens from its OF
2149 *acknowledge = (unsigned long)-1;
2151 if (cpu_no != prom.cpu) {
2152 /* Primary Thread of non-boot cpu or any thread */
2153 prom_printf("starting cpu hw idx %u... ", cpu_no);
2154 call_prom("start-cpu", 3, 0, node,
2155 secondary_hold, cpu_no);
2157 for (i = 0; (i < 100000000) &&
2158 (*acknowledge == ((unsigned long)-1)); i++ )
2161 if (*acknowledge == cpu_no)
2162 prom_printf("done\n");
2164 prom_printf("failed: %lx\n", *acknowledge);
2168 prom_printf("boot cpu hw idx %u\n", cpu_no);
2169 #endif /* CONFIG_SMP */
2172 prom_debug("prom_hold_cpus: end...\n");
2176 static void __init prom_init_client_services(unsigned long pp)
2178 /* Get a handle to the prom entry point before anything else */
2181 /* get a handle for the stdout device */
2182 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2183 if (!PHANDLE_VALID(prom.chosen))
2184 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2186 /* get device tree root */
2187 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2188 if (!PHANDLE_VALID(prom.root))
2189 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2196 * For really old powermacs, we need to map things we claim.
2197 * For that, we need the ihandle of the mmu.
2198 * Also, on the longtrail, we need to work around other bugs.
2200 static void __init prom_find_mmu(void)
2205 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2206 if (!PHANDLE_VALID(oprom))
2208 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2210 version[sizeof(version) - 1] = 0;
2211 /* XXX might need to add other versions here */
2212 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2213 of_workarounds = OF_WA_CLAIM;
2214 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2215 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2216 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2219 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2220 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2221 sizeof(prom.mmumap));
2222 prom.mmumap = be32_to_cpu(prom.mmumap);
2223 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2224 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2227 #define prom_find_mmu()
2230 static void __init prom_init_stdout(void)
2232 char *path = of_stdout_device;
2234 phandle stdout_node;
2237 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2238 prom_panic("cannot find stdout");
2240 prom.stdout = be32_to_cpu(val);
2242 /* Get the full OF pathname of the stdout device */
2243 memset(path, 0, 256);
2244 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2245 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2246 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2247 path, prom_strlen(path) + 1);
2249 /* instance-to-package fails on PA-Semi */
2250 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2251 if (stdout_node != PROM_ERROR) {
2252 val = cpu_to_be32(stdout_node);
2254 /* If it's a display, note it */
2255 memset(type, 0, sizeof(type));
2256 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2257 if (prom_strcmp(type, "display") == 0)
2258 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2262 static int __init prom_find_machine_type(void)
2271 /* Look for a PowerMac or a Cell */
2272 len = prom_getprop(prom.root, "compatible",
2273 compat, sizeof(compat)-1);
2277 char *p = &compat[i];
2278 int sl = prom_strlen(p);
2281 if (prom_strstr(p, "Power Macintosh") ||
2282 prom_strstr(p, "MacRISC"))
2283 return PLATFORM_POWERMAC;
2285 /* We must make sure we don't detect the IBM Cell
2286 * blades as pSeries due to some firmware issues,
2289 if (prom_strstr(p, "IBM,CBEA") ||
2290 prom_strstr(p, "IBM,CPBW-1.0"))
2291 return PLATFORM_GENERIC;
2292 #endif /* CONFIG_PPC64 */
2297 /* Try to figure out if it's an IBM pSeries or any other
2298 * PAPR compliant platform. We assume it is if :
2299 * - /device_type is "chrp" (please, do NOT use that for future
2303 len = prom_getprop(prom.root, "device_type",
2304 compat, sizeof(compat)-1);
2306 return PLATFORM_GENERIC;
2307 if (prom_strcmp(compat, "chrp"))
2308 return PLATFORM_GENERIC;
2310 /* Default to pSeries. We need to know if we are running LPAR */
2311 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2312 if (!PHANDLE_VALID(rtas))
2313 return PLATFORM_GENERIC;
2314 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2315 if (x != PROM_ERROR) {
2316 prom_debug("Hypertas detected, assuming LPAR !\n");
2317 return PLATFORM_PSERIES_LPAR;
2319 return PLATFORM_PSERIES;
2321 return PLATFORM_GENERIC;
2325 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2327 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2331 * If we have a display that we don't know how to drive,
2332 * we will want to try to execute OF's open method for it
2333 * later. However, OF will probably fall over if we do that
2334 * we've taken over the MMU.
2335 * So we check whether we will need to open the display,
2336 * and if so, open it now.
2338 static void __init prom_check_displays(void)
2340 char type[16], *path;
2345 static const unsigned char default_colors[] __initconst = {
2363 const unsigned char *clut;
2365 prom_debug("Looking for displays\n");
2366 for (node = 0; prom_next_node(&node); ) {
2367 memset(type, 0, sizeof(type));
2368 prom_getprop(node, "device_type", type, sizeof(type));
2369 if (prom_strcmp(type, "display") != 0)
2372 /* It seems OF doesn't null-terminate the path :-( */
2373 path = prom_scratch;
2374 memset(path, 0, sizeof(prom_scratch));
2377 * leave some room at the end of the path for appending extra
2380 if (call_prom("package-to-path", 3, 1, node, path,
2381 sizeof(prom_scratch) - 10) == PROM_ERROR)
2383 prom_printf("found display : %s, opening... ", path);
2385 ih = call_prom("open", 1, 1, path);
2387 prom_printf("failed\n");
2392 prom_printf("done\n");
2393 prom_setprop(node, path, "linux,opened", NULL, 0);
2395 /* Setup a usable color table when the appropriate
2396 * method is available. Should update this to set-colors */
2397 clut = default_colors;
2398 for (i = 0; i < 16; i++, clut += 3)
2399 if (prom_set_color(ih, i, clut[0], clut[1],
2403 #ifdef CONFIG_LOGO_LINUX_CLUT224
2404 clut = PTRRELOC(logo_linux_clut224.clut);
2405 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2406 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2409 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
2411 #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2412 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2414 u32 width, height, pitch, addr;
2416 prom_printf("Setting btext !\n");
2417 prom_getprop(node, "width", &width, 4);
2418 prom_getprop(node, "height", &height, 4);
2419 prom_getprop(node, "linebytes", &pitch, 4);
2420 prom_getprop(node, "address", &addr, 4);
2421 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2422 width, height, pitch, addr);
2423 btext_setup_display(width, height, 8, pitch, addr);
2424 btext_prepare_BAT();
2426 #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2431 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2432 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2433 unsigned long needed, unsigned long align)
2437 *mem_start = ALIGN(*mem_start, align);
2438 while ((*mem_start + needed) > *mem_end) {
2439 unsigned long room, chunk;
2441 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2443 room = alloc_top - alloc_bottom;
2444 if (room > DEVTREE_CHUNK_SIZE)
2445 room = DEVTREE_CHUNK_SIZE;
2446 if (room < PAGE_SIZE)
2447 prom_panic("No memory for flatten_device_tree "
2449 chunk = alloc_up(room, 0);
2451 prom_panic("No memory for flatten_device_tree "
2452 "(claim failed)\n");
2453 *mem_end = chunk + room;
2456 ret = (void *)*mem_start;
2457 *mem_start += needed;
2462 #define dt_push_token(token, mem_start, mem_end) do { \
2463 void *room = make_room(mem_start, mem_end, 4, 4); \
2464 *(__be32 *)room = cpu_to_be32(token); \
2467 static unsigned long __init dt_find_string(char *str)
2471 s = os = (char *)dt_string_start;
2473 while (s < (char *)dt_string_end) {
2474 if (prom_strcmp(s, str) == 0)
2476 s += prom_strlen(s) + 1;
2482 * The Open Firmware 1275 specification states properties must be 31 bytes or
2483 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2485 #define MAX_PROPERTY_NAME 64
2487 static void __init scan_dt_build_strings(phandle node,
2488 unsigned long *mem_start,
2489 unsigned long *mem_end)
2491 char *prev_name, *namep, *sstart;
2495 sstart = (char *)dt_string_start;
2497 /* get and store all property names */
2500 /* 64 is max len of name including nul. */
2501 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2502 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2503 /* No more nodes: unwind alloc */
2504 *mem_start = (unsigned long)namep;
2509 if (prom_strcmp(namep, "name") == 0) {
2510 *mem_start = (unsigned long)namep;
2514 /* get/create string entry */
2515 soff = dt_find_string(namep);
2517 *mem_start = (unsigned long)namep;
2518 namep = sstart + soff;
2520 /* Trim off some if we can */
2521 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2522 dt_string_end = *mem_start;
2527 /* do all our children */
2528 child = call_prom("child", 1, 1, node);
2529 while (child != 0) {
2530 scan_dt_build_strings(child, mem_start, mem_end);
2531 child = call_prom("peer", 1, 1, child);
2535 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2536 unsigned long *mem_end)
2539 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2541 unsigned char *valp;
2542 static char pname[MAX_PROPERTY_NAME] __prombss;
2543 int l, room, has_phandle = 0;
2545 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2547 /* get the node's full name */
2548 namep = (char *)*mem_start;
2549 room = *mem_end - *mem_start;
2552 l = call_prom("package-to-path", 3, 1, node, namep, room);
2554 /* Didn't fit? Get more room. */
2556 if (l >= *mem_end - *mem_start)
2557 namep = make_room(mem_start, mem_end, l+1, 1);
2558 call_prom("package-to-path", 3, 1, node, namep, l);
2562 /* Fixup an Apple bug where they have bogus \0 chars in the
2563 * middle of the path in some properties, and extract
2564 * the unit name (everything after the last '/').
2566 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2573 *mem_start = ALIGN((unsigned long)lp + 1, 4);
2576 /* get it again for debugging */
2577 path = prom_scratch;
2578 memset(path, 0, sizeof(prom_scratch));
2579 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2581 /* get and store all properties */
2583 sstart = (char *)dt_string_start;
2585 if (call_prom("nextprop", 3, 1, node, prev_name,
2590 if (prom_strcmp(pname, "name") == 0) {
2595 /* find string offset */
2596 soff = dt_find_string(pname);
2598 prom_printf("WARNING: Can't find string index for"
2599 " <%s>, node %s\n", pname, path);
2602 prev_name = sstart + soff;
2605 l = call_prom("getproplen", 2, 1, node, pname);
2608 if (l == PROM_ERROR)
2611 /* push property head */
2612 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2613 dt_push_token(l, mem_start, mem_end);
2614 dt_push_token(soff, mem_start, mem_end);
2616 /* push property content */
2617 valp = make_room(mem_start, mem_end, l, 4);
2618 call_prom("getprop", 4, 1, node, pname, valp, l);
2619 *mem_start = ALIGN(*mem_start, 4);
2621 if (!prom_strcmp(pname, "phandle"))
2625 /* Add a "phandle" property if none already exist */
2627 soff = dt_find_string("phandle");
2629 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2631 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2632 dt_push_token(4, mem_start, mem_end);
2633 dt_push_token(soff, mem_start, mem_end);
2634 valp = make_room(mem_start, mem_end, 4, 4);
2635 *(__be32 *)valp = cpu_to_be32(node);
2639 /* do all our children */
2640 child = call_prom("child", 1, 1, node);
2641 while (child != 0) {
2642 scan_dt_build_struct(child, mem_start, mem_end);
2643 child = call_prom("peer", 1, 1, child);
2646 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2649 static void __init flatten_device_tree(void)
2652 unsigned long mem_start, mem_end, room;
2653 struct boot_param_header *hdr;
2658 * Check how much room we have between alloc top & bottom (+/- a
2659 * few pages), crop to 1MB, as this is our "chunk" size
2661 room = alloc_top - alloc_bottom - 0x4000;
2662 if (room > DEVTREE_CHUNK_SIZE)
2663 room = DEVTREE_CHUNK_SIZE;
2664 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2666 /* Now try to claim that */
2667 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2669 prom_panic("Can't allocate initial device-tree chunk\n");
2670 mem_end = mem_start + room;
2672 /* Get root of tree */
2673 root = call_prom("peer", 1, 1, (phandle)0);
2674 if (root == (phandle)0)
2675 prom_panic ("couldn't get device tree root\n");
2677 /* Build header and make room for mem rsv map */
2678 mem_start = ALIGN(mem_start, 4);
2679 hdr = make_room(&mem_start, &mem_end,
2680 sizeof(struct boot_param_header), 4);
2681 dt_header_start = (unsigned long)hdr;
2682 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2684 /* Start of strings */
2685 mem_start = PAGE_ALIGN(mem_start);
2686 dt_string_start = mem_start;
2687 mem_start += 4; /* hole */
2689 /* Add "phandle" in there, we'll need it */
2690 namep = make_room(&mem_start, &mem_end, 16, 1);
2691 prom_strcpy(namep, "phandle");
2692 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2694 /* Build string array */
2695 prom_printf("Building dt strings...\n");
2696 scan_dt_build_strings(root, &mem_start, &mem_end);
2697 dt_string_end = mem_start;
2699 /* Build structure */
2700 mem_start = PAGE_ALIGN(mem_start);
2701 dt_struct_start = mem_start;
2702 prom_printf("Building dt structure...\n");
2703 scan_dt_build_struct(root, &mem_start, &mem_end);
2704 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2705 dt_struct_end = PAGE_ALIGN(mem_start);
2708 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2709 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2710 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2711 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2712 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2713 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2714 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2715 hdr->version = cpu_to_be32(OF_DT_VERSION);
2716 /* Version 16 is not backward compatible */
2717 hdr->last_comp_version = cpu_to_be32(0x10);
2719 /* Copy the reserve map in */
2720 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2725 prom_printf("reserved memory map:\n");
2726 for (i = 0; i < mem_reserve_cnt; i++)
2727 prom_printf(" %llx - %llx\n",
2728 be64_to_cpu(mem_reserve_map[i].base),
2729 be64_to_cpu(mem_reserve_map[i].size));
2732 /* Bump mem_reserve_cnt to cause further reservations to fail
2733 * since it's too late.
2735 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2737 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2738 dt_string_start, dt_string_end);
2739 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2740 dt_struct_start, dt_struct_end);
2743 #ifdef CONFIG_PPC_MAPLE
2744 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2745 * The values are bad, and it doesn't even have the right number of cells. */
2746 static void __init fixup_device_tree_maple(void)
2749 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2753 name = "/ht@0/isa@4";
2754 isa = call_prom("finddevice", 1, 1, ADDR(name));
2755 if (!PHANDLE_VALID(isa)) {
2756 name = "/ht@0/isa@6";
2757 isa = call_prom("finddevice", 1, 1, ADDR(name));
2758 rloc = 0x01003000; /* IO space; PCI device = 6 */
2760 if (!PHANDLE_VALID(isa))
2763 if (prom_getproplen(isa, "ranges") != 12)
2765 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2769 if (isa_ranges[0] != 0x1 ||
2770 isa_ranges[1] != 0xf4000000 ||
2771 isa_ranges[2] != 0x00010000)
2774 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2776 isa_ranges[0] = 0x1;
2777 isa_ranges[1] = 0x0;
2778 isa_ranges[2] = rloc;
2779 isa_ranges[3] = 0x0;
2780 isa_ranges[4] = 0x0;
2781 isa_ranges[5] = 0x00010000;
2782 prom_setprop(isa, name, "ranges",
2783 isa_ranges, sizeof(isa_ranges));
2786 #define CPC925_MC_START 0xf8000000
2787 #define CPC925_MC_LENGTH 0x1000000
2788 /* The values for memory-controller don't have right number of cells */
2789 static void __init fixup_device_tree_maple_memory_controller(void)
2793 char *name = "/hostbridge@f8000000";
2796 mc = call_prom("finddevice", 1, 1, ADDR(name));
2797 if (!PHANDLE_VALID(mc))
2800 if (prom_getproplen(mc, "reg") != 8)
2803 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2804 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2805 if ((ac != 2) || (sc != 2))
2808 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2811 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2814 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2817 mc_reg[1] = CPC925_MC_START;
2819 mc_reg[3] = CPC925_MC_LENGTH;
2820 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2823 #define fixup_device_tree_maple()
2824 #define fixup_device_tree_maple_memory_controller()
2827 #ifdef CONFIG_PPC_CHRP
2829 * Pegasos and BriQ lacks the "ranges" property in the isa node
2830 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2831 * Pegasos has the IDE configured in legacy mode, but advertised as native
2833 static void __init fixup_device_tree_chrp(void)
2837 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2841 name = "/pci@80000000/isa@c";
2842 ph = call_prom("finddevice", 1, 1, ADDR(name));
2843 if (!PHANDLE_VALID(ph)) {
2844 name = "/pci@ff500000/isa@6";
2845 ph = call_prom("finddevice", 1, 1, ADDR(name));
2846 rloc = 0x01003000; /* IO space; PCI device = 6 */
2848 if (PHANDLE_VALID(ph)) {
2849 rc = prom_getproplen(ph, "ranges");
2850 if (rc == 0 || rc == PROM_ERROR) {
2851 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2858 prop[5] = 0x00010000;
2859 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2863 name = "/pci@80000000/ide@C,1";
2864 ph = call_prom("finddevice", 1, 1, ADDR(name));
2865 if (PHANDLE_VALID(ph)) {
2866 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2869 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2870 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2871 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2872 if (rc == sizeof(u32)) {
2874 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2879 #define fixup_device_tree_chrp()
2882 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2883 static void __init fixup_device_tree_pmac(void)
2885 phandle u3, i2c, mpic;
2890 /* Some G5s have a missing interrupt definition, fix it up here */
2891 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2892 if (!PHANDLE_VALID(u3))
2894 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2895 if (!PHANDLE_VALID(i2c))
2897 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2898 if (!PHANDLE_VALID(mpic))
2901 /* check if proper rev of u3 */
2902 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2905 if (u3_rev < 0x35 || u3_rev > 0x39)
2907 /* does it need fixup ? */
2908 if (prom_getproplen(i2c, "interrupts") > 0)
2911 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2913 /* interrupt on this revision of u3 is number 0 and level */
2916 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2917 &interrupts, sizeof(interrupts));
2919 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2920 &parent, sizeof(parent));
2923 #define fixup_device_tree_pmac()
2926 #ifdef CONFIG_PPC_EFIKA
2928 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2929 * to talk to the phy. If the phy-handle property is missing, then this
2930 * function is called to add the appropriate nodes and link it to the
2933 static void __init fixup_device_tree_efika_add_phy(void)
2939 /* Check if /builtin/ethernet exists - bail if it doesn't */
2940 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2941 if (!PHANDLE_VALID(node))
2944 /* Check if the phy-handle property exists - bail if it does */
2945 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2950 * At this point the ethernet device doesn't have a phy described.
2951 * Now we need to add the missing phy node and linkage
2954 /* Check for an MDIO bus node - if missing then create one */
2955 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2956 if (!PHANDLE_VALID(node)) {
2957 prom_printf("Adding Ethernet MDIO node\n");
2958 call_prom("interpret", 1, 1,
2959 " s\" /builtin\" find-device"
2961 " 1 encode-int s\" #address-cells\" property"
2962 " 0 encode-int s\" #size-cells\" property"
2963 " s\" mdio\" device-name"
2964 " s\" fsl,mpc5200b-mdio\" encode-string"
2965 " s\" compatible\" property"
2966 " 0xf0003000 0x400 reg"
2968 " 0x5 encode-int encode+"
2969 " 0x3 encode-int encode+"
2970 " s\" interrupts\" property"
2974 /* Check for a PHY device node - if missing then create one and
2975 * give it's phandle to the ethernet node */
2976 node = call_prom("finddevice", 1, 1,
2977 ADDR("/builtin/mdio/ethernet-phy"));
2978 if (!PHANDLE_VALID(node)) {
2979 prom_printf("Adding Ethernet PHY node\n");
2980 call_prom("interpret", 1, 1,
2981 " s\" /builtin/mdio\" find-device"
2983 " s\" ethernet-phy\" device-name"
2984 " 0x10 encode-int s\" reg\" property"
2988 " s\" /builtin/ethernet\" find-device"
2990 " s\" phy-handle\" property"
2995 static void __init fixup_device_tree_efika(void)
2997 int sound_irq[3] = { 2, 2, 0 };
2998 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2999 3,4,0, 3,5,0, 3,6,0, 3,7,0,
3000 3,8,0, 3,9,0, 3,10,0, 3,11,0,
3001 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
3006 /* Check if we're really running on a EFIKA */
3007 node = call_prom("finddevice", 1, 1, ADDR("/"));
3008 if (!PHANDLE_VALID(node))
3011 rv = prom_getprop(node, "model", prop, sizeof(prop));
3012 if (rv == PROM_ERROR)
3014 if (prom_strcmp(prop, "EFIKA5K2"))
3017 prom_printf("Applying EFIKA device tree fixups\n");
3019 /* Claiming to be 'chrp' is death */
3020 node = call_prom("finddevice", 1, 1, ADDR("/"));
3021 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
3022 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3023 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3025 /* CODEGEN,description is exposed in /proc/cpuinfo so
3027 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3028 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3029 prom_setprop(node, "/", "CODEGEN,description",
3030 "Efika 5200B PowerPC System",
3031 sizeof("Efika 5200B PowerPC System"));
3033 /* Fixup bestcomm interrupts property */
3034 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3035 if (PHANDLE_VALID(node)) {
3036 len = prom_getproplen(node, "interrupts");
3038 prom_printf("Fixing bestcomm interrupts property\n");
3039 prom_setprop(node, "/builtin/bestcom", "interrupts",
3040 bcomm_irq, sizeof(bcomm_irq));
3044 /* Fixup sound interrupts property */
3045 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3046 if (PHANDLE_VALID(node)) {
3047 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3048 if (rv == PROM_ERROR) {
3049 prom_printf("Adding sound interrupts property\n");
3050 prom_setprop(node, "/builtin/sound", "interrupts",
3051 sound_irq, sizeof(sound_irq));
3055 /* Make sure ethernet phy-handle property exists */
3056 fixup_device_tree_efika_add_phy();
3059 #define fixup_device_tree_efika()
3062 #ifdef CONFIG_PPC_PASEMI_NEMO
3064 * CFE supplied on Nemo is broken in several ways, biggest
3065 * problem is that it reassigns ISA interrupts to unused mpic ints.
3066 * Add an interrupt-controller property for the io-bridge to use
3067 * and correct the ints so we can attach them to an irq_domain
3069 static void __init fixup_device_tree_pasemi(void)
3071 u32 interrupts[2], parent, rval, val = 0;
3072 char *name, *pci_name;
3075 /* Find the root pci node */
3076 name = "/pxp@0,e0000000";
3077 iob = call_prom("finddevice", 1, 1, ADDR(name));
3078 if (!PHANDLE_VALID(iob))
3081 /* check if interrupt-controller node set yet */
3082 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3085 prom_printf("adding interrupt-controller property for SB600...\n");
3087 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3089 pci_name = "/pxp@0,e0000000/pci@11";
3090 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3093 for( ; prom_next_node(&node); ) {
3094 /* scan each node for one with an interrupt */
3095 if (!PHANDLE_VALID(node))
3098 rval = prom_getproplen(node, "interrupts");
3099 if (rval == 0 || rval == PROM_ERROR)
3102 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3103 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3106 /* found a node, update both interrupts and interrupt-parent */
3107 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3108 interrupts[0] -= 203;
3109 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3110 interrupts[0] -= 213;
3111 if (interrupts[0] == 221)
3113 if (interrupts[0] == 222)
3116 prom_setprop(node, pci_name, "interrupts", interrupts,
3117 sizeof(interrupts));
3118 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3123 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3124 * so that generic isa-bridge code can add the SB600 and its on-board
3127 name = "/pxp@0,e0000000/io-bridge@0";
3128 iob = call_prom("finddevice", 1, 1, ADDR(name));
3129 if (!PHANDLE_VALID(iob))
3132 /* device_type is already set, just change it. */
3134 prom_printf("Changing device_type of SB600 node...\n");
3136 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3138 #else /* !CONFIG_PPC_PASEMI_NEMO */
3139 static inline void fixup_device_tree_pasemi(void) { }
3142 static void __init fixup_device_tree(void)
3144 fixup_device_tree_maple();
3145 fixup_device_tree_maple_memory_controller();
3146 fixup_device_tree_chrp();
3147 fixup_device_tree_pmac();
3148 fixup_device_tree_efika();
3149 fixup_device_tree_pasemi();
3152 static void __init prom_find_boot_cpu(void)
3159 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3161 prom_cpu = be32_to_cpu(rval);
3163 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3165 if (!PHANDLE_VALID(cpu_pkg))
3168 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3169 prom.cpu = be32_to_cpu(rval);
3171 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3174 static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3176 #ifdef CONFIG_BLK_DEV_INITRD
3177 if (r3 && r4 && r4 != 0xdeadbeef) {
3180 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3181 prom_initrd_end = prom_initrd_start + r4;
3183 val = cpu_to_be64(prom_initrd_start);
3184 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3186 val = cpu_to_be64(prom_initrd_end);
3187 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3190 reserve_mem(prom_initrd_start,
3191 prom_initrd_end - prom_initrd_start);
3193 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3194 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3196 #endif /* CONFIG_BLK_DEV_INITRD */
3200 #ifdef CONFIG_RELOCATABLE
3201 static void reloc_toc(void)
3205 static void unreloc_toc(void)
3209 static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
3212 unsigned long *toc_entry;
3214 /* Get the start of the TOC by using r2 directly. */
3215 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
3217 for (i = 0; i < nr_entries; i++) {
3218 *toc_entry = *toc_entry + offset;
3223 static void reloc_toc(void)
3225 unsigned long offset = reloc_offset();
3226 unsigned long nr_entries =
3227 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
3229 __reloc_toc(offset, nr_entries);
3234 static void unreloc_toc(void)
3236 unsigned long offset = reloc_offset();
3237 unsigned long nr_entries =
3238 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
3242 __reloc_toc(-offset, nr_entries);
3247 #ifdef CONFIG_PPC_SVM
3249 * Perform the Enter Secure Mode ultracall.
3251 static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
3253 register unsigned long r3 asm("r3") = UV_ESM;
3254 register unsigned long r4 asm("r4") = kbase;
3255 register unsigned long r5 asm("r5") = fdt;
3257 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3263 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3265 static void setup_secure_guest(unsigned long kbase, unsigned long fdt)
3269 if (!prom_svm_enable)
3272 /* Switch to secure mode. */
3273 prom_printf("Switching to secure mode.\n");
3276 * The ultravisor will do an integrity check of the kernel image but we
3277 * relocated it so the check will fail. Restore the original image by
3278 * relocating it back to the kernel virtual base address.
3280 if (IS_ENABLED(CONFIG_RELOCATABLE))
3281 relocate(KERNELBASE);
3283 ret = enter_secure_mode(kbase, fdt);
3285 /* Relocate the kernel again. */
3286 if (IS_ENABLED(CONFIG_RELOCATABLE))
3289 if (ret != U_SUCCESS) {
3290 prom_printf("Returned %d from switching to secure mode.\n", ret);
3291 prom_rtas_os_term("Switch to secure mode failed.\n");
3295 static void setup_secure_guest(unsigned long kbase, unsigned long fdt)
3298 #endif /* CONFIG_PPC_SVM */
3301 * We enter here early on, when the Open Firmware prom is still
3302 * handling exceptions and the MMU hash table for us.
3305 unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3307 unsigned long r6, unsigned long r7,
3308 unsigned long kbase)
3313 unsigned long offset = reloc_offset();
3320 * First zero the BSS
3322 memset(&__bss_start, 0, __bss_stop - __bss_start);
3325 * Init interface to Open Firmware, get some node references,
3328 prom_init_client_services(pp);
3331 * See if this OF is old enough that we need to do explicit maps
3332 * and other workarounds
3337 * Init prom stdout device
3341 prom_printf("Preparing to boot %s", linux_banner);
3344 * Get default machine type. At this point, we do not differentiate
3345 * between pSeries SMP and pSeries LPAR
3347 of_platform = prom_find_machine_type();
3348 prom_printf("Detected machine type: %x\n", of_platform);
3350 #ifndef CONFIG_NONSTATIC_KERNEL
3351 /* Bail if this is a kdump kernel. */
3352 if (PHYSICAL_START > 0)
3353 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3357 * Check for an initrd
3359 prom_check_initrd(r3, r4);
3362 * Do early parsing of command line
3364 early_cmdline_parse();
3366 #ifdef CONFIG_PPC_PSERIES
3368 * On pSeries, inform the firmware about our capabilities
3370 if (of_platform == PLATFORM_PSERIES ||
3371 of_platform == PLATFORM_PSERIES_LPAR)
3372 prom_send_capabilities();
3376 * Copy the CPU hold code
3378 if (of_platform != PLATFORM_POWERMAC)
3379 copy_and_flush(0, kbase, 0x100, 0);
3382 * Initialize memory management within prom_init
3387 * Determine which cpu is actually running right _now_
3389 prom_find_boot_cpu();
3392 * Initialize display devices
3394 prom_check_displays();
3396 #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3398 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3399 * that uses the allocator, we need to make sure we get the top of memory
3400 * available for us here...
3402 if (of_platform == PLATFORM_PSERIES)
3403 prom_initialize_tce_table();
3407 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3408 * have a usable RTAS implementation.
3410 if (of_platform != PLATFORM_POWERMAC)
3411 prom_instantiate_rtas();
3414 /* instantiate sml */
3415 prom_instantiate_sml();
3419 * On non-powermacs, put all CPUs in spin-loops.
3421 * PowerMacs use a different mechanism to spin CPUs
3423 * (This must be done after instanciating RTAS)
3425 if (of_platform != PLATFORM_POWERMAC)
3429 * Fill in some infos for use by the kernel later on
3431 if (prom_memory_limit) {
3432 __be64 val = cpu_to_be64(prom_memory_limit);
3433 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3438 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3441 if (prom_iommu_force_on)
3442 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3445 if (prom_tce_alloc_start) {
3446 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3447 &prom_tce_alloc_start,
3448 sizeof(prom_tce_alloc_start));
3449 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3450 &prom_tce_alloc_end,
3451 sizeof(prom_tce_alloc_end));
3456 * Fixup any known bugs in the device-tree
3458 fixup_device_tree();
3461 * Now finally create the flattened device-tree
3463 prom_printf("copying OF device tree...\n");
3464 flatten_device_tree();
3467 * in case stdin is USB and still active on IBM machines...
3468 * Unfortunately quiesce crashes on some powermacs if we have
3469 * closed stdin already (in particular the powerbook 101).
3471 if (of_platform != PLATFORM_POWERMAC)
3475 * Call OF "quiesce" method to shut down pending DMA's from
3478 prom_printf("Quiescing Open Firmware ...\n");
3479 call_prom("quiesce", 0, 0);
3482 * And finally, call the kernel passing it the flattened device
3483 * tree and NULL as r5, thus triggering the new entry point which
3484 * is common to us and kexec
3486 hdr = dt_header_start;
3488 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3489 prom_debug("->dt_header_start=0x%lx\n", hdr);
3492 reloc_got2(-offset);
3497 /* Move to secure memory if we're supposed to be secure guests. */
3498 setup_secure_guest(kbase, hdr);
3500 __start(hdr, kbase, 0, 0, 0, 0, 0);