mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-07 04:03:35 +00:00
c49888203d
Talk about buggy firmware... the OF on the Longtrail returns 0 from the claim client service rather than -1 when the claim fails. It also has no device_type on the /memory node and blows up if the output buffer for package-to-path is too big. This also fixes a bug with calling alloc_up with align == 0, where we did _ALIGN_UP(alloc_bottom, 0) which will end up as 0. Lastly, we now check the return value (in r3) from calling the prom, and return -1 from call_prom if we get a negative value back. That is supposed to indicate that the requested client service doesn't exist. Signed-off-by: Paul Mackerras <paulus@samba.org>
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*
|
|
* 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 <linux/string.h>
|
|
#include "nonstdio.h"
|
|
#include "of1275.h"
|
|
#include <asm/processor.h>
|
|
#include <asm/page.h>
|
|
|
|
/* Passed from the linker */
|
|
extern char __image_begin, __image_end;
|
|
extern char __ramdisk_begin, __ramdisk_end;
|
|
extern char _start, _end;
|
|
|
|
extern unsigned int heap_max;
|
|
extern void flush_cache(void *, unsigned long);
|
|
extern void gunzip(void *, int, unsigned char *, int *);
|
|
extern void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
|
|
unsigned int progend);
|
|
|
|
char *avail_ram;
|
|
char *begin_avail, *end_avail;
|
|
char *avail_high;
|
|
|
|
#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
|
|
#define PROG_SIZE 0x007f0000 /* 8MB */
|
|
|
|
#define SCRATCH_SIZE (128 << 10)
|
|
|
|
static char scratch[SCRATCH_SIZE]; /* 128k of scratch space for gunzip */
|
|
|
|
typedef void (*kernel_start_t)(int, int, void *, unsigned int, unsigned int);
|
|
|
|
void
|
|
boot(int a1, int a2, void *prom)
|
|
{
|
|
unsigned sa, len;
|
|
void *dst;
|
|
unsigned char *im;
|
|
unsigned int initrd_size, initrd_start;
|
|
|
|
printf("chrpboot starting: loaded at 0x%p\n\r", &_start);
|
|
|
|
initrd_size = &__ramdisk_end - &__ramdisk_begin;
|
|
if (initrd_size) {
|
|
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%p (%x bytes)\n\r",
|
|
initrd_start, &__ramdisk_begin, initrd_size);
|
|
memcpy((char *)initrd_start, &__ramdisk_begin, initrd_size);
|
|
} else {
|
|
initrd_start = 0;
|
|
initrd_size = 0;
|
|
a2 = 0xdeadbeef;
|
|
}
|
|
|
|
im = &__image_begin;
|
|
len = &__image_end - &__image_begin;
|
|
/* claim 4MB starting at PROG_START */
|
|
claim(PROG_START, PROG_SIZE - PROG_START, 0);
|
|
dst = (void *) PROG_START;
|
|
if (im[0] == 0x1f && im[1] == 0x8b) {
|
|
avail_ram = scratch;
|
|
begin_avail = avail_high = avail_ram;
|
|
end_avail = scratch + sizeof(scratch);
|
|
printf("gunzipping (0x%p <- 0x%p:0x%p)...", dst, im, im+len);
|
|
gunzip(dst, PROG_SIZE - PROG_START, im, &len);
|
|
printf("done %u bytes\n\r", len);
|
|
printf("%u bytes of heap consumed, max in use %u\n\r",
|
|
avail_high - begin_avail, heap_max);
|
|
} else {
|
|
memmove(dst, im, len);
|
|
}
|
|
|
|
flush_cache(dst, len);
|
|
make_bi_recs(((unsigned long) dst + len), "chrpboot", _MACH_chrp,
|
|
(PROG_START + PROG_SIZE));
|
|
|
|
sa = PROG_START;
|
|
printf("start address = 0x%x\n\r", sa);
|
|
|
|
(*(kernel_start_t)sa)(a1, a2, prom, initrd_start, initrd_size);
|
|
|
|
printf("returned?\n\r");
|
|
|
|
pause();
|
|
}
|