arch/ia64/hp/sim/boot/fw-emu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * PAL & SAL emulation.
   4  *
   5  * Copyright (C) 1998-2001 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8
   9 #ifdef CONFIG_PCI
  10 # include <linux/pci.h>
  11 #endif
  12
  13 #include <linux/efi.h>
  14 #include <asm/io.h>
  15 #include <asm/pal.h>
  16 #include <asm/sal.h>
  17 #include <asm/setup.h>
  18
  19 #include "ssc.h"
  20
  21 #define MB      (1024*1024UL)
  22
  23 #define SIMPLE_MEMMAP   1
  24
  25 #if SIMPLE_MEMMAP
  26 # define NUM_MEM_DESCS  4
  27 #else
  28 # define NUM_MEM_DESCS  16
  29 #endif
  30
  31 static char fw_mem[(  sizeof(struct ia64_boot_param)
  32                     + sizeof(efi_system_table_t)
  33                     + sizeof(efi_runtime_services_t)
  34                     + 1*sizeof(efi_config_table_t)
  35                     + sizeof(struct ia64_sal_systab)
  36                     + sizeof(struct ia64_sal_desc_entry_point)
  37                     + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
  38                     + 1024)] __attribute__ ((aligned (8)));
  39
  40 #define SECS_PER_HOUR   (60 * 60)
  41 #define SECS_PER_DAY    (SECS_PER_HOUR * 24)
  42
  43 /* Compute the `struct tm' representation of *T,
  44    offset OFFSET seconds east of UTC,
  45    and store year, yday, mon, mday, wday, hour, min, sec into *TP.
  46    Return nonzero if successful.  */
  47 int
  48 offtime (unsigned long t, efi_time_t *tp)
  49 {
  50         const unsigned short int __mon_yday[2][13] =
  51         {
  52                 /* Normal years.  */
  53                 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
  54                 /* Leap years.  */
  55                 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
  56         };
  57         long int days, rem, y;
  58         const unsigned short int *ip;
  59
  60         days = t / SECS_PER_DAY;
  61         rem = t % SECS_PER_DAY;
  62         while (rem < 0) {
  63                 rem += SECS_PER_DAY;
  64                 --days;
  65         }
  66         while (rem >= SECS_PER_DAY) {
  67                 rem -= SECS_PER_DAY;
  68                 ++days;
  69         }
  70         tp->hour = rem / SECS_PER_HOUR;
  71         rem %= SECS_PER_HOUR;
  72         tp->minute = rem / 60;
  73         tp->second = rem % 60;
  74         /* January 1, 1970 was a Thursday.  */
  75         y = 1970;
  76
  77 #       define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
  78 #       define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
  79 #       define __isleap(year) \
  80           ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
  81
  82         while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
  83                 /* Guess a corrected year, assuming 365 days per year.  */
  84                 long int yg = y + days / 365 - (days % 365 < 0);
  85
  86                 /* Adjust DAYS and Y to match the guessed year.  */
  87                 days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
  88                          - LEAPS_THRU_END_OF (y - 1));
  89                 y = yg;
  90         }
  91         tp->year = y;
  92         ip = __mon_yday[__isleap(y)];
  93         for (y = 11; days < (long int) ip[y]; --y)
  94                 continue;
  95         days -= ip[y];
  96         tp->month = y + 1;
  97         tp->day = days + 1;
  98         return 1;
  99 }
 100
 101 extern void pal_emulator_static (void);
 102
 103 /* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
 104
 105 #define BUILD_CMD(addr)         ((0x80000000 | (addr)) & ~3)
 106
 107 #define REG_OFFSET(addr)        (0x00000000000000FF & (addr))
 108 #define DEVICE_FUNCTION(addr)   (0x000000000000FF00 & (addr))
 109 #define BUS_NUMBER(addr)        (0x0000000000FF0000 & (addr))
 110
 111 static efi_status_t
 112 fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
 113 {
 114 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
 115         struct {
 116                 int tv_sec;     /* must be 32bits to work */
 117                 int tv_usec;
 118         } tv32bits;
 119
 120         ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
 121
 122         memset(tm, 0, sizeof(*tm));
 123         offtime(tv32bits.tv_sec, tm);
 124
 125         if (tc)
 126                 memset(tc, 0, sizeof(*tc));
 127 #else
 128 #       error Not implemented yet...
 129 #endif
 130         return EFI_SUCCESS;
 131 }
 132
 133 static void
 134 efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
 135 {
 136 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
 137         ssc(status, 0, 0, 0, SSC_EXIT);
 138 #else
 139 #       error Not implemented yet...
 140 #endif
 141 }
 142
 143 static efi_status_t
 144 efi_unimplemented (void)
 145 {
 146         return EFI_UNSUPPORTED;
 147 }
 148
 149 static struct sal_ret_values
 150 sal_emulator (long index, unsigned long in1, unsigned long in2,
 151               unsigned long in3, unsigned long in4, unsigned long in5,
 152               unsigned long in6, unsigned long in7)
 153 {
 154         long r9  = 0;
 155         long r10 = 0;
 156         long r11 = 0;
 157         long status;
 158
 159         /*
 160          * Don't do a "switch" here since that gives us code that
 161          * isn't self-relocatable.
 162          */
 163         status = 0;
 164         if (index == SAL_FREQ_BASE) {
 165                 if (in1 == SAL_FREQ_BASE_PLATFORM)
 166                         r9 = 200000000;
 167                 else if (in1 == SAL_FREQ_BASE_INTERVAL_TIMER) {
 168                         /*
 169                          * Is this supposed to be the cr.itc frequency
 170                          * or something platform specific?  The SAL
 171                          * doc ain't exactly clear on this...
 172                          */
 173                         r9 = 700000000;
 174                 } else if (in1 == SAL_FREQ_BASE_REALTIME_CLOCK)
 175                         r9 = 1;
 176                 else
 177                         status = -1;
 178         } else if (index == SAL_SET_VECTORS) {
 179                 ;
 180         } else if (index == SAL_GET_STATE_INFO) {
 181                 ;
 182         } else if (index == SAL_GET_STATE_INFO_SIZE) {
 183                 ;
 184         } else if (index == SAL_CLEAR_STATE_INFO) {
 185                 ;
 186         } else if (index == SAL_MC_RENDEZ) {
 187                 ;
 188         } else if (index == SAL_MC_SET_PARAMS) {
 189                 ;
 190         } else if (index == SAL_CACHE_FLUSH) {
 191                 ;
 192         } else if (index == SAL_CACHE_INIT) {
 193                 ;
 194 #ifdef CONFIG_PCI
 195         } else if (index == SAL_PCI_CONFIG_READ) {
 196                 /*
 197                  * in1 contains the PCI configuration address and in2
 198                  * the size of the read.  The value that is read is
 199                  * returned via the general register r9.
 200                  */
 201                 outl(BUILD_CMD(in1), 0xCF8);
 202                 if (in2 == 1)                           /* Reading byte  */
 203                         r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
 204                 else if (in2 == 2)                      /* Reading word  */
 205                         r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
 206                 else                                    /* Reading dword */
 207                         r9 = inl(0xCFC);
 208                 status = PCIBIOS_SUCCESSFUL;
 209         } else if (index == SAL_PCI_CONFIG_WRITE) {
 210                 /*
 211                  * in1 contains the PCI configuration address, in2 the
 212                  * size of the write, and in3 the actual value to be
 213                  * written out.
 214                  */
 215                 outl(BUILD_CMD(in1), 0xCF8);
 216                 if (in2 == 1)                           /* Writing byte  */
 217                         outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
 218                 else if (in2 == 2)                      /* Writing word  */
 219                         outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
 220                 else                                    /* Writing dword */
 221                         outl(in3, 0xCFC);
 222                 status = PCIBIOS_SUCCESSFUL;
 223 #endif /* CONFIG_PCI */
 224         } else if (index == SAL_UPDATE_PAL) {
 225                 ;
 226         } else {
 227                 status = -1;
 228         }
 229         return ((struct sal_ret_values) {status, r9, r10, r11});
 230 }
 231
 232 struct ia64_boot_param *
 233 sys_fw_init (const char *args, int arglen)
 234 {
 235         efi_system_table_t *efi_systab;
 236         efi_runtime_services_t *efi_runtime;
 237         efi_config_table_t *efi_tables;
 238         struct ia64_sal_systab *sal_systab;
 239         efi_memory_desc_t *efi_memmap, *md;
 240         unsigned long *pal_desc, *sal_desc;
 241         struct ia64_sal_desc_entry_point *sal_ed;
 242         struct ia64_boot_param *bp;
 243         unsigned char checksum = 0;
 244         char *cp, *cmd_line;
 245         int i = 0;
 246 #       define MAKE_MD(typ, attr, start, end)           \
 247         do {                                            \
 248                 md = efi_memmap + i++;                  \
 249                 md->type = typ;                         \
 250                 md->pad = 0;                            \
 251                 md->phys_addr = start;                  \
 252                 md->virt_addr = 0;                      \
 253                 md->num_pages = (end - start) >> 12;    \
 254                 md->attribute = attr;                   \
 255         } while (0)
 256
 257         memset(fw_mem, 0, sizeof(fw_mem));
 258
 259         pal_desc = (unsigned long *) &pal_emulator_static;
 260         sal_desc = (unsigned long *) &sal_emulator;
 261
 262         cp = fw_mem;
 263         efi_systab  = (void *) cp; cp += sizeof(*efi_systab);
 264         efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
 265         efi_tables  = (void *) cp; cp += sizeof(*efi_tables);
 266         sal_systab  = (void *) cp; cp += sizeof(*sal_systab);
 267         sal_ed      = (void *) cp; cp += sizeof(*sal_ed);
 268         efi_memmap  = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
 269         bp          = (void *) cp; cp += sizeof(*bp);
 270         cmd_line    = (void *) cp;
 271
 272         if (args) {
 273                 if (arglen >= 1024)
 274                         arglen = 1023;
 275                 memcpy(cmd_line, args, arglen);
 276         } else {
 277                 arglen = 0;
 278         }
 279         cmd_line[arglen] = '\0';
 280
 281         memset(efi_systab, 0, sizeof(*efi_systab));
 282         efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
 283         efi_systab->hdr.revision  = ((1 << 16) | 00);
 284         efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
 285         efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
 286         efi_systab->fw_revision = 1;
 287         efi_systab->runtime = (void *) __pa(efi_runtime);
 288         efi_systab->nr_tables = 1;
 289         efi_systab->tables = __pa(efi_tables);
 290
 291         efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
 292         efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
 293         efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
 294         efi_runtime->get_time = (void *)__pa(&fw_efi_get_time);
 295         efi_runtime->set_time = (void *)__pa(&efi_unimplemented);
 296         efi_runtime->get_wakeup_time = (void *)__pa(&efi_unimplemented);
 297         efi_runtime->set_wakeup_time = (void *)__pa(&efi_unimplemented);
 298         efi_runtime->set_virtual_address_map = (void *)__pa(&efi_unimplemented);
 299         efi_runtime->get_variable = (void *)__pa(&efi_unimplemented);
 300         efi_runtime->get_next_variable = (void *)__pa(&efi_unimplemented);
 301         efi_runtime->set_variable = (void *)__pa(&efi_unimplemented);
 302         efi_runtime->get_next_high_mono_count = (void *)__pa(&efi_unimplemented);
 303         efi_runtime->reset_system = (void *)__pa(&efi_reset_system);
 304
 305         efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
 306         efi_tables->table = __pa(sal_systab);
 307
 308         /* fill in the SAL system table: */
 309         memcpy(sal_systab->signature, "SST_", 4);
 310         sal_systab->size = sizeof(*sal_systab);
 311         sal_systab->sal_rev_minor = 1;
 312         sal_systab->sal_rev_major = 0;
 313         sal_systab->entry_count = 1;
 314
 315 #ifdef CONFIG_IA64_GENERIC
 316         strcpy(sal_systab->oem_id, "Generic");
 317         strcpy(sal_systab->product_id, "IA-64 system");
 318 #endif
 319
 320 #ifdef CONFIG_IA64_HP_SIM
 321         strcpy(sal_systab->oem_id, "Hewlett-Packard");
 322         strcpy(sal_systab->product_id, "HP-simulator");
 323 #endif
 324
 325         /* fill in an entry point: */
 326         sal_ed->type = SAL_DESC_ENTRY_POINT;
 327         sal_ed->pal_proc = __pa(pal_desc[0]);
 328         sal_ed->sal_proc = __pa(sal_desc[0]);
 329         sal_ed->gp = __pa(sal_desc[1]);
 330
 331         for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
 332                 checksum += *cp;
 333
 334         sal_systab->checksum = -checksum;
 335
 336 #if SIMPLE_MEMMAP
 337         /* simulate free memory at physical address zero */
 338         MAKE_MD(EFI_BOOT_SERVICES_DATA,         EFI_MEMORY_WB,    0*MB,    1*MB);
 339         MAKE_MD(EFI_PAL_CODE,                   EFI_MEMORY_WB,    1*MB,    2*MB);
 340         MAKE_MD(EFI_CONVENTIONAL_MEMORY,        EFI_MEMORY_WB,    2*MB,  130*MB);
 341         MAKE_MD(EFI_CONVENTIONAL_MEMORY,        EFI_MEMORY_WB, 4096*MB, 4128*MB);
 342 #else
 343         MAKE_MD( 4,                0x9, 0x0000000000000000, 0x0000000000001000);
 344         MAKE_MD( 7,                0x9, 0x0000000000001000, 0x000000000008a000);
 345         MAKE_MD( 4,                0x9, 0x000000000008a000, 0x00000000000a0000);
 346         MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
 347         MAKE_MD( 7,                0x9, 0x0000000000100000, 0x0000000004400000);
 348         MAKE_MD( 2,                0x9, 0x0000000004400000, 0x0000000004be5000);
 349         MAKE_MD( 7,                0x9, 0x0000000004be5000, 0x000000007f77e000);
 350         MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
 351         MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
 352         MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
 353         MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
 354         MAKE_MD( 7,                0x9, 0x000000007fc3a000, 0x000000007fea0000);
 355         MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
 356         MAKE_MD( 7,                0x9, 0x000000007fea8000, 0x000000007feab000);
 357         MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
 358         MAKE_MD( 7,                0x9, 0x00000000ff400000, 0x0000000104000000);
 359 #endif
 360
 361         bp->efi_systab = __pa(&fw_mem);
 362         bp->efi_memmap = __pa(efi_memmap);
 363         bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
 364         bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
 365         bp->efi_memdesc_version = 1;
 366         bp->command_line = __pa(cmd_line);
 367         bp->console_info.num_cols = 80;
 368         bp->console_info.num_rows = 25;
 369         bp->console_info.orig_x = 0;
 370         bp->console_info.orig_y = 24;
 371         bp->fpswa = 0;
 372
 373         return bp;
 374 }