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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"
extern void *finddevice(const char *);
extern int getprop(void *, const char *, void *, int);
void gunzip(void *, int, unsigned char *, int *);
#define get_16be(x) (*(unsigned short *)(x))
#define get_32be(x) (*(unsigned *)(x))
#define RAM_START 0x00000000
#define RAM_END (8<<20)
#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;
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;
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);
end_avail = (char *)initrd_start;
} else
end_avail = (char *) RAM_END;
im = image_data;
len = image_len;
dst = (void *) PROG_START;
if (im[0] == 0x1f && im[1] == 0x8b) {
avail_ram = (char *)RAM_FREE;
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);
(*(void (*)())sa)(0, 0, prom, a1, a2);
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)
{
}
#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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