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Diffstat (limited to 'arch/ppc64/boot/main.c')
-rw-r--r--arch/ppc64/boot/main.c268
1 files changed, 105 insertions, 163 deletions
diff --git a/arch/ppc64/boot/main.c b/arch/ppc64/boot/main.c
index f7ec19a2d0b0..c1dc876bccab 100644
--- a/arch/ppc64/boot/main.c
+++ b/arch/ppc64/boot/main.c
@@ -17,7 +17,6 @@
#include "prom.h"
#include "zlib.h"
-static void gunzip(void *, int, unsigned char *, int *);
extern void flush_cache(void *, unsigned long);
@@ -26,31 +25,26 @@ extern void flush_cache(void *, unsigned long);
#define RAM_END (512<<20) // Fixme: use OF */
#define ONE_MB 0x100000
-static char *avail_ram;
-static char *begin_avail, *end_avail;
-static char *avail_high;
-static unsigned int heap_use;
-static unsigned int heap_max;
-
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 unsigned long vmlinux_filesize;
-extern unsigned long vmlinux_memsize;
struct addr_range {
unsigned long addr;
unsigned long size;
unsigned long memsize;
};
-static struct addr_range vmlinux = {0, 0, 0};
-static struct addr_range vmlinuz = {0, 0, 0};
-static struct addr_range initrd = {0, 0, 0};
+static struct addr_range vmlinux;
+static struct addr_range vmlinuz;
+static struct addr_range initrd;
+
+static char scratch[46912]; /* scratch space for gunzip, from zlib_inflate_workspacesize() */
+static char elfheader[256];
-static char scratch[128<<10]; /* 128kB of scratch space for gunzip */
typedef void (*kernel_entry_t)( unsigned long,
unsigned long,
@@ -62,6 +56,63 @@ typedef void (*kernel_entry_t)( unsigned long,
static unsigned long claim_base;
+#define HEAD_CRC 2
+#define EXTRA_FIELD 4
+#define ORIG_NAME 8
+#define COMMENT 0x10
+#define RESERVED 0xe0
+
+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();
+ }
+
+ 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();
+ }
+ *lenp = s.next_out - (unsigned char *) dst;
+ zlib_inflateEnd(&s);
+}
+
static unsigned long try_claim(unsigned long size)
{
unsigned long addr = 0;
@@ -80,13 +131,16 @@ static unsigned long try_claim(unsigned long size)
return addr;
}
-void start(unsigned long a1, unsigned long a2, void *promptr)
+void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
{
unsigned long i;
+ int len;
kernel_entry_t kernel_entry;
Elf64_Ehdr *elf64;
Elf64_Phdr *elf64ph;
+ memset(__bss_start, 0, _end - __bss_start);
+
prom = (int (*)(void *)) promptr;
chosen_handle = finddevice("/chosen");
if (chosen_handle == (void *) -1)
@@ -97,7 +151,7 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
if (getprop(chosen_handle, "stdin", &stdin, sizeof(stdin)) != 4)
exit();
- printf("\n\rzImage starting: loaded at 0x%lx\n\r", (unsigned long) _start);
+ printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, sp);
/*
* The first available claim_base must be above the end of the
@@ -118,25 +172,45 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
claim_base = PROG_START;
#endif
- /*
- * Now we try to claim some memory for the kernel itself
- * our "vmlinux_memsize" is the memory footprint in RAM, _HOWEVER_, what
- * our Makefile stuffs in is an image containing all sort of junk including
- * an ELF header. We need to do some calculations here to find the right
- * size... In practice we add 1Mb, that is enough, but we should really
- * consider fixing the Makefile to put a _raw_ kernel in there !
- */
- vmlinux_memsize += ONE_MB;
- printf("Allocating 0x%lx bytes for kernel ...\n\r", vmlinux_memsize);
- vmlinux.addr = try_claim(vmlinux_memsize);
+ 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));
+
+ elf64 = (Elf64_Ehdr *)elfheader;
+ 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 )
+ {
+ printf("Error: not a valid PPC64 ELF file!\n\r");
+ exit();
+ }
+
+ 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 && elf64ph->p_offset != 0)
+ break;
+ }
+ vmlinux.size = (unsigned long)elf64ph->p_filesz;
+ vmlinux.memsize = (unsigned long)elf64ph->p_memsz;
+ printf("Allocating 0x%lx bytes for kernel ...\n\r", vmlinux.memsize);
+ vmlinux.addr = try_claim(vmlinux.memsize);
if (vmlinux.addr == 0) {
printf("Can't allocate memory for kernel image !\n\r");
exit();
}
- vmlinuz.addr = (unsigned long)_vmlinux_start;
- vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);
- vmlinux.size = PAGE_ALIGN(vmlinux_filesize);
- vmlinux.memsize = vmlinux_memsize;
/*
* Now we try to claim memory for the initrd (and copy it there)
@@ -160,49 +234,22 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
/* Eventually gunzip the kernel */
if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
- int len;
- avail_ram = scratch;
- begin_avail = avail_high = avail_ram;
- end_avail = scratch + sizeof(scratch);
printf("gunzipping (0x%lx <- 0x%lx:0x%0lx)...",
vmlinux.addr, vmlinuz.addr, vmlinuz.addr+vmlinuz.size);
len = vmlinuz.size;
- gunzip((void *)vmlinux.addr, vmlinux.size,
+ gunzip((void *)vmlinux.addr, vmlinux.memsize,
(unsigned char *)vmlinuz.addr, &len);
printf("done 0x%lx bytes\n\r", len);
- printf("0x%x bytes of heap consumed, max in use 0x%x\n\r",
- (unsigned)(avail_high - begin_avail), heap_max);
} else {
memmove((void *)vmlinux.addr,(void *)vmlinuz.addr,vmlinuz.size);
}
/* Skip over the ELF header */
- elf64 = (Elf64_Ehdr *)vmlinux.addr;
- 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 )
- {
- printf("Error: not a valid PPC64 ELF file!\n\r");
- exit();
- }
-
- 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 && elf64ph->p_offset != 0)
- break;
- }
#ifdef DEBUG
printf("... skipping 0x%lx bytes of ELF header\n\r",
(unsigned long)elf64ph->p_offset);
#endif
vmlinux.addr += (unsigned long)elf64ph->p_offset;
- vmlinux.size -= (unsigned long)elf64ph->p_offset;
flush_cache((void *)vmlinux.addr, vmlinux.size);
@@ -225,108 +272,3 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
exit();
}
-struct memchunk {
- unsigned int size;
- unsigned int pad;
- struct memchunk *next;
-};
-
-static struct memchunk *freechunks;
-
-void *zalloc(void *x, unsigned items, unsigned size)
-{
- void *p;
- struct memchunk **mpp, *mp;
-
- size *= items;
- size = _ALIGN(size, sizeof(struct memchunk));
- heap_use += size;
- if (heap_use > heap_max)
- heap_max = heap_use;
- for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
- if (mp->size == size) {
- *mpp = mp->next;
- return mp;
- }
- }
- p = avail_ram;
- avail_ram += size;
- if (avail_ram > avail_high)
- avail_high = avail_ram;
- if (avail_ram > end_avail) {
- printf("oops... out of memory\n\r");
- pause();
- }
- return p;
-}
-
-void zfree(void *x, void *addr, unsigned nb)
-{
- struct memchunk *mp = addr;
-
- nb = _ALIGN(nb, sizeof(struct memchunk));
- heap_use -= nb;
- if (avail_ram == addr + nb) {
- avail_ram = addr;
- return;
- }
- mp->size = nb;
- mp->next = freechunks;
- freechunks = mp;
-}
-
-#define HEAD_CRC 2
-#define EXTRA_FIELD 4
-#define ORIG_NAME 8
-#define COMMENT 0x10
-#define RESERVED 0xe0
-
-#define DEFLATED 8
-
-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] != 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();
- }
-
- s.zalloc = zalloc;
- s.zfree = zfree;
- r = 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 = inflate(&s, Z_FINISH);
- if (r != Z_OK && r != Z_STREAM_END) {
- printf("inflate returned %d msg: %s\n\r", r, s.msg);
- exit();
- }
- *lenp = s.next_out - (unsigned char *) dst;
- inflateEnd(&s);
-}
-