?? main.c
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/* * BK Id: SCCS/s.main.c 1.13 07/27/01 20:24:17 trini *//* * 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 "nonstdio.h"#include <asm/processor.h>extern char _end[];extern char initrd_data[];extern char image_data[];extern char sysmap_data[];extern int getprop(void *, const char *, void *, int);extern int initrd_len;extern int image_len;extern int sysmap_len;extern unsigned int heap_max;extern void claim(unsigned int virt, unsigned int size, unsigned int align);extern void *finddevice(const char *);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);extern void pause(void);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 0x00400000 /* 4MB */#define SCRATCH_SIZE (128 << 10)static char scratch[SCRATCH_SIZE]; /* 1MB of scratch space for gunzip */voidchrpboot(int a1, int a2, void *prom){ unsigned sa, len; void *dst; unsigned char *im; unsigned initrd_start=0, initrd_size=0; extern char _start; printf("chrpboot starting: loaded at 0x%p\n\r", &_start); if (initrd_len) { initrd_size = initrd_len; initrd_start = (RAM_END - initrd_size) & ~0xFFF; claim(initrd_start, RAM_END - initrd_start, 0); printf("initial ramdisk moving 0x%x <- 0x%p (%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, 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, 0x400000, 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 = (unsigned long)PROG_START; printf("start address = 0x%x\n\r", sa); (*(void (*)())sa)(a1, a2, prom, initrd_start, initrd_size); printf("returned?\n\r"); pause();}
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