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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | /* * 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 "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); extern char *claim(unsigned, unsigned, unsigned); void make_bi_recs(unsigned long); void gunzip(void *, int, unsigned char *, int *); #define get_16be(x) (*(unsigned short *)(x)) #define get_32be(x) (*(unsigned *)(x)) #define RAM_START 0xc0000000 #define PROG_START RAM_START #define RAM_END (RAM_START + 0x800000) /* only 8M mapped with BATs */ char *avail_ram; char *end_avail; extern char _start[], _end[]; extern char image_data[]; extern int image_len; extern char initrd_data[]; extern int initrd_len; boot(int a1, int a2, void *prom) { int ns, oh, i; unsigned sa, len; void *dst; unsigned char *im; unsigned initrd_start, initrd_size; printf("coffboot starting: loaded at 0x%x\n", _start); setup_bats(RAM_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_START, RAM_END - initrd_start, 0); printf("initial ramdisk moving 0x%x <- 0x%x (%x bytes)\n", initrd_start, initrd_data, initrd_size); memcpy((char *)initrd_start, initrd_data, initrd_size); } im = image_data; len = image_len; /* claim 3MB starting at 0 */ claim(0, 3 << 20, 0); dst = (void *) RAM_START; if (im[0] == 0x1f && im[1] == 0x8b) { /* claim 512kB for scratch space */ avail_ram = claim(0, 512 << 10, 0x10) + RAM_START; end_avail = avail_ram + (512 << 10); printf("avail_ram = %x\n", avail_ram); printf("gunzipping (0x%x <- 0x%x:0x%0x)...", dst, im, im+len); gunzip(dst, 3 << 20, im, &len); printf("done %u bytes\n", len); } else { memmove(dst, im, len); } flush_cache(dst, len); make_bi_recs((unsigned long)dst + len); sa = (unsigned long)PROG_START; printf("start address = 0x%x\n", sa); #if 0 pause(); #endif (*(void (*)())sa)(a1, a2, prom); printf("returned?\n"); pause(); } void make_bi_recs(unsigned long addr) { struct bi_record *rec; rec = (struct bi_record *)PAGE_ALIGN(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, "coffboot"); rec->size = sizeof(struct bi_record) + strlen("coffboot") + 1; rec = (struct bi_record *)((unsigned long)rec + rec->size); rec->tag = BI_MACHTYPE; rec->data[0] = _MACH_Pmac; rec->data[1] = 1; rec->size = sizeof(struct bi_record) + 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); } 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"); 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"); 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"); exit(); } s.zalloc = zalloc; s.zfree = zfree; r = inflateInit2(&s, -MAX_WBITS); if (r != Z_OK) { printf("inflateInit2 returned %d\n", 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, s.msg); exit(); } *lenp = s.next_out - (unsigned char *) dst; inflateEnd(&s); } |