blob: fdacafe0963666dde1731915aedd8b1873b6e10c [file] [log] [blame]
/*
* Copyright (C) Paul Mackerras 1997.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include "zlib.h"
#include "of1275.h"
#include "nonstdio.h"
#include <asm/bootinfo.h>
#include <asm/page.h>
/* Information from the linker */
extern char __sysmap_begin, __sysmap_end;
extern int strcmp(const char *s1, const char *s2);
extern char *avail_ram, *avail_high;
extern char *end_avail;
unsigned int heap_use, heap_max;
struct memchunk {
unsigned int size;
struct memchunk *next;
};
static struct memchunk *freechunks;
static void *zalloc(void *x, unsigned items, unsigned size)
{
void *p;
struct memchunk **mpp, *mp;
size *= items;
size = (size + 7) & -8;
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;
}
static void zfree(void *x, void *addr, unsigned nb)
{
struct memchunk *mp = addr;
nb = (nb + 7) & -8;
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
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);
}
/* Make a bi_rec in OF. We need to be passed a name for BI_BOOTLOADER_ID,
* a machine type for BI_MACHTYPE, and the location where the end of the
* bootloader is (PROG_START + PROG_SIZE)
*/
void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
unsigned long progend)
{
unsigned long sysmap_size;
struct bi_record *rec;
/* FIgure out the size of a possible System.map we're going to
* pass along.
* */
sysmap_size = (unsigned long)(&__sysmap_end) -
(unsigned long)(&__sysmap_begin);
/* leave a 1MB gap then align to the next 1MB boundary */
addr = _ALIGN(addr+ (1<<20) - 1, (1<<20));
/* oldworld machine seem very unhappy about this. -- Tom */
if (addr >= progend)
claim(addr, 0x1000, 0);
rec = (struct bi_record *)addr;
rec->tag = BI_FIRST;
rec->size = sizeof(struct bi_record);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
rec->tag = BI_BOOTLOADER_ID;
sprintf( (char *)rec->data, name);
rec->size = sizeof(struct bi_record) + strlen(name) + 1;
rec = (struct bi_record *)((unsigned long)rec + rec->size);
rec->tag = BI_MACHTYPE;
rec->data[0] = mach;
rec->data[1] = 1;
rec->size = sizeof(struct bi_record) + 2 * sizeof(unsigned long);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
if (sysmap_size) {
rec->tag = BI_SYSMAP;
rec->data[0] = (unsigned long)(&__sysmap_begin);
rec->data[1] = sysmap_size;
rec->size = sizeof(struct bi_record) + 2 *
sizeof(unsigned long);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
}
rec->tag = BI_LAST;
rec->size = sizeof(struct bi_record);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
}