#include "page.h"
#include "string.h"
#include "stdio.h"
-#include "zlib.h"
#include "ops.h"
+#include "gunzip_util.h"
#include "flatdevtree.h"
+#include "reg.h"
-extern void flush_cache(void *, unsigned long);
-
-extern char _start[];
-extern char __bss_start[];
-extern char _end[];
-extern char _vmlinux_start[];
-extern char _vmlinux_end[];
-extern char _initrd_start[];
-extern char _initrd_end[];
-extern char _dtb_start[];
-extern char _dtb_end[];
+static struct gunzip_state gzstate;
struct addr_range {
- unsigned long addr;
+ void *addr;
unsigned long size;
- unsigned long memsize;
};
-static struct addr_range vmlinux;
-static struct addr_range vmlinuz;
-static struct addr_range initrd;
-static unsigned long elfoffset;
-static int is_64bit;
+#undef DEBUG
-/* scratch space for gunzip; 46912 is from zlib_inflate_workspacesize() */
-static char scratch[46912];
-static char elfheader[256];
+static struct addr_range prep_kernel(void)
+{
+ char elfheader[256];
+ void *vmlinuz_addr = _vmlinux_start;
+ unsigned long vmlinuz_size = _vmlinux_end - _vmlinux_start;
+ void *addr = 0;
+ struct elf_info ei;
+ int len;
-typedef void (*kernel_entry_t)(unsigned long, unsigned long, void *);
+ /* gunzip the ELF header of the kernel */
+ gunzip_start(&gzstate, vmlinuz_addr, vmlinuz_size);
+ gunzip_exactly(&gzstate, elfheader, sizeof(elfheader));
-#undef DEBUG
+ if (!parse_elf64(elfheader, &ei) && !parse_elf32(elfheader, &ei))
+ fatal("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
-#define HEAD_CRC 2
-#define EXTRA_FIELD 4
-#define ORIG_NAME 8
-#define COMMENT 0x10
-#define RESERVED 0xe0
+ if (platform_ops.image_hdr)
+ platform_ops.image_hdr(elfheader);
-static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
-{
- z_stream s;
- int r, i, flags;
-
- /* skip header */
- i = 10;
- flags = src[3];
- if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
- printf("bad gzipped data\n\r");
- exit();
- }
- if ((flags & EXTRA_FIELD) != 0)
- i = 12 + src[10] + (src[11] << 8);
- if ((flags & ORIG_NAME) != 0)
- while (src[i++] != 0)
- ;
- if ((flags & COMMENT) != 0)
- while (src[i++] != 0)
- ;
- if ((flags & HEAD_CRC) != 0)
- i += 2;
- if (i >= *lenp) {
- printf("gunzip: ran out of data in header\n\r");
- exit();
- }
+ /* We need to alloc the memsize: gzip will expand the kernel
+ * text/data, then possible rubbish we don't care about. But
+ * the kernel bss must be claimed (it will be zero'd by the
+ * kernel itself)
+ */
+ printf("Allocating 0x%lx bytes for kernel ...\n\r", ei.memsize);
- if (zlib_inflate_workspacesize() > sizeof(scratch)) {
- printf("gunzip needs more mem\n");
- exit();
- }
- memset(&s, 0, sizeof(s));
- s.workspace = scratch;
- r = zlib_inflateInit2(&s, -MAX_WBITS);
- if (r != Z_OK) {
- printf("inflateInit2 returned %d\n\r", r);
- exit();
- }
- s.next_in = src + i;
- s.avail_in = *lenp - i;
- s.next_out = dst;
- s.avail_out = dstlen;
- r = zlib_inflate(&s, Z_FULL_FLUSH);
- if (r != Z_OK && r != Z_STREAM_END) {
- printf("inflate returned %d msg: %s\n\r", r, s.msg);
- exit();
+ if (platform_ops.vmlinux_alloc) {
+ addr = platform_ops.vmlinux_alloc(ei.memsize);
+ } else {
+ if ((unsigned long)_start < ei.memsize)
+ fatal("Insufficient memory for kernel at address 0!"
+ " (_start=%p)\n\r", _start);
}
- *lenp = s.next_out - (unsigned char *) dst;
- zlib_inflateEnd(&s);
-}
-static int is_elf64(void *hdr)
-{
- Elf64_Ehdr *elf64 = hdr;
- Elf64_Phdr *elf64ph;
- unsigned int i;
-
- if (!(elf64->e_ident[EI_MAG0] == ELFMAG0 &&
- elf64->e_ident[EI_MAG1] == ELFMAG1 &&
- elf64->e_ident[EI_MAG2] == ELFMAG2 &&
- elf64->e_ident[EI_MAG3] == ELFMAG3 &&
- elf64->e_ident[EI_CLASS] == ELFCLASS64 &&
- elf64->e_ident[EI_DATA] == ELFDATA2MSB &&
- elf64->e_type == ET_EXEC &&
- elf64->e_machine == EM_PPC64))
- return 0;
-
- elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
- (unsigned long)elf64->e_phoff);
- for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
- if (elf64ph->p_type == PT_LOAD)
- break;
- if (i >= (unsigned int)elf64->e_phnum)
- return 0;
-
- elfoffset = (unsigned long)elf64ph->p_offset;
- vmlinux.size = (unsigned long)elf64ph->p_filesz + elfoffset;
- vmlinux.memsize = (unsigned long)elf64ph->p_memsz + elfoffset;
-
- is_64bit = 1;
- return 1;
-}
+ /* Finally, gunzip the kernel */
+ printf("gunzipping (0x%p <- 0x%p:0x%p)...", addr,
+ vmlinuz_addr, vmlinuz_addr+vmlinuz_size);
+ /* discard up to the actual load data */
+ gunzip_discard(&gzstate, ei.elfoffset - sizeof(elfheader));
+ len = gunzip_finish(&gzstate, addr, ei.loadsize);
+ if (len != ei.loadsize)
+ fatal("ran out of data! only got 0x%x of 0x%lx bytes.\n\r",
+ len, ei.loadsize);
+ printf("done 0x%x bytes\n\r", len);
-static int is_elf32(void *hdr)
-{
- Elf32_Ehdr *elf32 = hdr;
- Elf32_Phdr *elf32ph;
- unsigned int i;
-
- if (!(elf32->e_ident[EI_MAG0] == ELFMAG0 &&
- elf32->e_ident[EI_MAG1] == ELFMAG1 &&
- elf32->e_ident[EI_MAG2] == ELFMAG2 &&
- elf32->e_ident[EI_MAG3] == ELFMAG3 &&
- elf32->e_ident[EI_CLASS] == ELFCLASS32 &&
- elf32->e_ident[EI_DATA] == ELFDATA2MSB &&
- elf32->e_type == ET_EXEC &&
- elf32->e_machine == EM_PPC))
- return 0;
-
- elf32 = (Elf32_Ehdr *)elfheader;
- elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
- for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
- if (elf32ph->p_type == PT_LOAD)
- break;
- if (i >= elf32->e_phnum)
- return 0;
-
- elfoffset = elf32ph->p_offset;
- vmlinux.size = elf32ph->p_filesz + elf32ph->p_offset;
- vmlinux.memsize = elf32ph->p_memsz + elf32ph->p_offset;
- return 1;
+ flush_cache(addr, ei.loadsize);
+
+ return (struct addr_range){addr, ei.memsize};
}
-static void prep_kernel(unsigned long a1, unsigned long a2)
+static struct addr_range prep_initrd(struct addr_range vmlinux, void *chosen,
+ unsigned long initrd_addr,
+ unsigned long initrd_size)
{
- int len;
-
- vmlinuz.addr = (unsigned long)_vmlinux_start;
- vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);
-
- /* gunzip the ELF header of the kernel */
- if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
- len = vmlinuz.size;
- gunzip(elfheader, sizeof(elfheader),
- (unsigned char *)vmlinuz.addr, &len);
- } else
- memcpy(elfheader, (const void *)vmlinuz.addr,
- sizeof(elfheader));
-
- if (!is_elf64(elfheader) && !is_elf32(elfheader)) {
- printf("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
- exit();
+ /* If we have an image attached to us, it overrides anything
+ * supplied by the loader. */
+ if (_initrd_end > _initrd_start) {
+ printf("Attached initrd image at 0x%p-0x%p\n\r",
+ _initrd_start, _initrd_end);
+ initrd_addr = (unsigned long)_initrd_start;
+ initrd_size = _initrd_end - _initrd_start;
+ } else if (initrd_size > 0) {
+ printf("Using loader supplied ramdisk at 0x%lx-0x%lx\n\r",
+ initrd_addr, initrd_addr + initrd_size);
}
- if (platform_ops.image_hdr)
- platform_ops.image_hdr(elfheader);
- /* We need to alloc the memsize plus the file offset since gzip
- * will expand the header (file offset), then the kernel, then
- * possible rubbish we don't care about. But the kernel bss must
- * be claimed (it will be zero'd by the kernel itself)
- */
- printf("Allocating 0x%lx bytes for kernel ...\n\r", vmlinux.memsize);
- vmlinux.addr = (unsigned long)malloc(vmlinux.memsize);
- if (vmlinux.addr == 0) {
- printf("Can't allocate memory for kernel image !\n\r");
- exit();
- }
+ /* If there's no initrd at all, we're done */
+ if (! initrd_size)
+ return (struct addr_range){0, 0};
/*
- * Now find the initrd
- *
- * First see if we have an image attached to us. If so
- * allocate memory for it and copy it there.
+ * If the initrd is too low it will be clobbered when the
+ * kernel relocates to its final location. In this case,
+ * allocate a safer place and move it.
*/
- initrd.size = (unsigned long)(_initrd_end - _initrd_start);
- initrd.memsize = initrd.size;
- if (initrd.size > 0) {
+ if (initrd_addr < vmlinux.size) {
+ void *old_addr = (void *)initrd_addr;
+
printf("Allocating 0x%lx bytes for initrd ...\n\r",
- initrd.size);
- initrd.addr = (unsigned long)malloc((u32)initrd.size);
- if (initrd.addr == 0) {
- printf("Can't allocate memory for initial "
- "ramdisk !\n\r");
- exit();
- }
- printf("initial ramdisk moving 0x%lx <- 0x%lx "
- "(0x%lx bytes)\n\r", initrd.addr,
- (unsigned long)_initrd_start, initrd.size);
- memmove((void *)initrd.addr, (void *)_initrd_start,
- initrd.size);
- printf("initrd head: 0x%lx\n\r",
- *((unsigned long *)initrd.addr));
- } else if (a2 != 0) {
- /* Otherwise, see if yaboot or another loader gave us an initrd */
- initrd.addr = a1;
- initrd.memsize = initrd.size = a2;
- printf("Using loader supplied initrd at 0x%lx (0x%lx bytes)\n\r",
- initrd.addr, initrd.size);
+ initrd_size);
+ initrd_addr = (unsigned long)malloc(initrd_size);
+ if (! initrd_addr)
+ fatal("Can't allocate memory for initial "
+ "ramdisk !\n\r");
+ printf("Relocating initrd 0x%lx <- 0x%p (0x%lx bytes)\n\r",
+ initrd_addr, old_addr, initrd_size);
+ memmove((void *)initrd_addr, old_addr, initrd_size);
}
- /* Eventually gunzip the kernel */
- if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
- printf("gunzipping (0x%lx <- 0x%lx:0x%0lx)...",
- vmlinux.addr, vmlinuz.addr, vmlinuz.addr+vmlinuz.size);
- len = vmlinuz.size;
- gunzip((void *)vmlinux.addr, vmlinux.memsize,
- (unsigned char *)vmlinuz.addr, &len);
- printf("done 0x%lx bytes\n\r", len);
- } else {
- memmove((void *)vmlinux.addr,(void *)vmlinuz.addr,
- vmlinuz.size);
- }
+ printf("initrd head: 0x%lx\n\r", *((unsigned long *)initrd_addr));
- /* Skip over the ELF header */
-#ifdef DEBUG
- printf("... skipping 0x%lx bytes of ELF header\n\r",
- elfoffset);
-#endif
- vmlinux.addr += elfoffset;
+ /* Tell the kernel initrd address via device tree */
+ setprop_val(chosen, "linux,initrd-start", (u32)(initrd_addr));
+ setprop_val(chosen, "linux,initrd-end", (u32)(initrd_addr+initrd_size));
- flush_cache((void *)vmlinux.addr, vmlinux.size);
+ return (struct addr_range){(void *)initrd_addr, initrd_size};
}
/* A buffer that may be edited by tools operating on a zImage binary so as to
* edit the command line passed to vmlinux (by setting /chosen/bootargs).
* The buffer is put in it's own section so that tools may locate it easier.
*/
-static char builtin_cmdline[COMMAND_LINE_SIZE]
+static char cmdline[COMMAND_LINE_SIZE]
__attribute__((__section__("__builtin_cmdline")));
-static void get_cmdline(char *buf, int size)
+static void prep_cmdline(void *chosen)
{
- void *devp;
- int len = strlen(builtin_cmdline);
+ if (cmdline[0] == '\0')
+ getprop(chosen, "bootargs", cmdline, COMMAND_LINE_SIZE-1);
- buf[0] = '\0';
+ printf("\n\rLinux/PowerPC load: %s", cmdline);
+ /* If possible, edit the command line */
+ if (console_ops.edit_cmdline)
+ console_ops.edit_cmdline(cmdline, COMMAND_LINE_SIZE);
+ printf("\n\r");
- if (len > 0) { /* builtin_cmdline overrides dt's /chosen/bootargs */
- len = min(len, size-1);
- strncpy(buf, builtin_cmdline, len);
- buf[len] = '\0';
- }
- else if ((devp = finddevice("/chosen")))
- getprop(devp, "bootargs", buf, size);
-}
-
-static void set_cmdline(char *buf)
-{
- void *devp;
-
- if ((devp = finddevice("/chosen")))
- setprop(devp, "bootargs", buf, strlen(buf) + 1);
+ /* Put the command line back into the devtree for the kernel */
+ setprop_str(chosen, "bootargs", cmdline);
}
struct platform_ops platform_ops;
struct dt_ops dt_ops;
struct console_ops console_ops;
+struct loader_info loader_info;
-void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
+void start(void)
{
+ struct addr_range vmlinux, initrd;
kernel_entry_t kentry;
- char cmdline[COMMAND_LINE_SIZE];
unsigned long ft_addr = 0;
+ void *chosen;
- memset(__bss_start, 0, _end - __bss_start);
- memset(&platform_ops, 0, sizeof(platform_ops));
- memset(&dt_ops, 0, sizeof(dt_ops));
- memset(&console_ops, 0, sizeof(console_ops));
+ /* Do this first, because malloc() could clobber the loader's
+ * command line. Only use the loader command line if a
+ * built-in command line wasn't set by an external tool */
+ if ((loader_info.cmdline_len > 0) && (cmdline[0] == '\0'))
+ memmove(cmdline, loader_info.cmdline,
+ min(loader_info.cmdline_len, COMMAND_LINE_SIZE-1));
- if (platform_init(promptr, _dtb_start, _dtb_end))
- exit();
if (console_ops.open && (console_ops.open() < 0))
exit();
if (platform_ops.fixups)
platform_ops.fixups();
printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r",
- _start, sp);
+ _start, get_sp());
- prep_kernel(a1, a2);
+ /* Ensure that the device tree has a /chosen node */
+ chosen = finddevice("/chosen");
+ if (!chosen)
+ chosen = create_node(NULL, "chosen");
- /* If cmdline came from zimage wrapper or if we can edit the one
- * in the dt, print it out and edit it, if possible.
- */
- if ((strlen(builtin_cmdline) > 0) || console_ops.edit_cmdline) {
- get_cmdline(cmdline, COMMAND_LINE_SIZE);
- printf("\n\rLinux/PowerPC load: %s", cmdline);
- if (console_ops.edit_cmdline)
- console_ops.edit_cmdline(cmdline, COMMAND_LINE_SIZE);
- printf("\n\r");
- set_cmdline(cmdline);
- }
+ vmlinux = prep_kernel();
+ initrd = prep_initrd(vmlinux, chosen,
+ loader_info.initrd_addr, loader_info.initrd_size);
+ prep_cmdline(chosen);
printf("Finalizing device tree...");
if (dt_ops.finalize)
if (ft_addr)
printf(" flat tree at 0x%lx\n\r", ft_addr);
else
- printf(" using OF tree (promptr=%p)\n\r", promptr);
+ printf(" using OF tree (promptr=%p)\n\r", loader_info.promptr);
if (console_ops.close)
console_ops.close();
if (ft_addr)
kentry(ft_addr, 0, NULL);
else
- /* XXX initrd addr/size should be passed in properties */
- kentry(initrd.addr, initrd.size, promptr);
+ kentry((unsigned long)initrd.addr, initrd.size,
+ loader_info.promptr);
- /* console closed so printf below may not work */
- printf("Error: Linux kernel returned to zImage boot wrapper!\n\r");
- exit();
+ /* console closed so printf in fatal below may not work */
+ fatal("Error: Linux kernel returned to zImage boot wrapper!\n\r");
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff