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/*
* 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 "../coffboot/nonstdio.h"
#include "../coffboot/zlib.h"
#include <asm/bootinfo.h>
#include <asm/processor.h>
#include <asm/page.h>
extern void *finddevice(const char *);
extern int getprop(void *, const char *, void *, int);
void gunzip(void *, int, unsigned char *, int *);
#define RAM_START 0x00000000
#define RAM_END (64<<20)
#define BOOT_START ((unsigned long)_start)
#define BOOT_END ((unsigned long)(_end + 0xFFF) & ~0xFFF)
#define RAM_FREE ((unsigned long)(_end+0x1000)&~0xFFF)
#define PROG_START 0x00010000
char *avail_ram;
char *end_avail;
extern char _end[];
extern char image_data[];
extern int image_len;
extern char initrd_data[];
extern int initrd_len;
extern char sysmap_data[];
extern int sysmap_len;
static char scratch[1024<<10]; /* 1MB of scratch space for gunzip */
chrpboot(int a1, int a2, void *prom)
{
int ns, oh, i;
unsigned sa, len;
void *dst;
unsigned char *im;
unsigned initrd_start, initrd_size;
extern char _start;
printf("chrpboot starting: loaded at 0x%x\n\r", &_start);
if (initrd_len) {
initrd_size = initrd_len;
initrd_start = (RAM_END - initrd_size) & ~0xFFF;
a1 = initrd_start;
a2 = initrd_size;
claim(initrd_start, RAM_END - initrd_start, 0);
printf("initial ramdisk moving 0x%x <- 0x%x (%x bytes)\n\r",
initrd_start, initrd_data, initrd_size);
memcpy((char *)initrd_start, initrd_data, initrd_size);
}
im = image_data;
len = image_len;
/* claim 4MB starting at PROG_START */
claim(PROG_START, (4<<20) - PROG_START, 0);
dst = (void *) PROG_START;
if (im[0] == 0x1f && im[1] == 0x8b) {
avail_ram = scratch;
end_avail = scratch + sizeof(scratch);
printf("gunzipping (0x%x <- 0x%x:0x%0x)...", dst, im, im+len);
gunzip(dst, 0x400000, im, &len);
printf("done %u bytes\n\r", len);
} else {
memmove(dst, im, len);
}
flush_cache(dst, len);
sa = (unsigned long)PROG_START;
printf("start address = 0x%x\n\r", sa);
{
struct bi_record *rec;
rec = (struct bi_record *)_ALIGN((unsigned long)dst+len+(1<<20)-1,(1<<20));
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, "chrpboot");
rec->size = sizeof(struct bi_record) + strlen("chrpboot") + 1;
rec = (struct bi_record *)((unsigned long)rec + rec->size);
rec->tag = BI_MACHTYPE;
rec->data[0] = _MACH_chrp;
rec->data[1] = 1;
rec->size = sizeof(struct bi_record) + sizeof(unsigned long);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
#if 0
rec->tag = BI_SYSMAP;
rec->data[0] = (unsigned long)sysmap_data;
rec->data[1] = sysmap_len;
rec->size = sizeof(struct bi_record) + sizeof(unsigned long);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
#endif
rec->tag = BI_LAST;
rec->size = sizeof(struct bi_record);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
}
(*(void (*)())sa)(a1, a2, prom);
printf("returned?\n\r");
pause();
}
void *zalloc(void *x, unsigned items, unsigned size)
{
void *p = avail_ram;
size *= items;
size = (size + 7) & -8;
avail_ram += size;
if (avail_ram > end_avail) {
printf("oops... out of memory\n\r");
pause();
}
return p;
}
void zfree(void *x, void *addr, unsigned nb)
{
nb = (nb + 7) & -8;
if (addr == (avail_ram - nb)) {
avail_ram -= nb;
}
}
#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);
}
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