2 * Copyright (C) Paul Mackerras 1997.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
13 #include <linux/string.h>
14 #include <asm/bootinfo.h>
17 /* Information from the linker */
18 extern char __sysmap_begin, __sysmap_end;
20 extern int strcmp(const char *s1, const char *s2);
21 extern char *avail_ram, *avail_high;
22 extern char *end_avail;
24 unsigned int heap_use, heap_max;
28 struct memchunk *next;
31 static struct memchunk *freechunks;
33 static void *zalloc(void *x, unsigned items, unsigned size)
36 struct memchunk **mpp, *mp;
39 size = (size + 7) & -8;
41 if (heap_use > heap_max)
43 for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
44 if (mp->size == size) {
51 if (avail_ram > avail_high)
52 avail_high = avail_ram;
53 if (avail_ram > end_avail) {
54 printf("oops... out of memory\n\r");
60 static void zfree(void *x, void *addr, unsigned nb)
62 struct memchunk *mp = addr;
66 if (avail_ram == addr + nb) {
71 mp->next = freechunks;
83 void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
91 if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
92 printf("bad gzipped data\n\r");
95 if ((flags & EXTRA_FIELD) != 0)
96 i = 12 + src[10] + (src[11] << 8);
97 if ((flags & ORIG_NAME) != 0)
100 if ((flags & COMMENT) != 0)
101 while (src[i++] != 0)
103 if ((flags & HEAD_CRC) != 0)
106 printf("gunzip: ran out of data in header\n\r");
112 r = inflateInit2(&s, -MAX_WBITS);
114 printf("inflateInit2 returned %d\n\r", r);
118 s.avail_in = *lenp - i;
120 s.avail_out = dstlen;
121 r = inflate(&s, Z_FINISH);
122 if (r != Z_OK && r != Z_STREAM_END) {
123 printf("inflate returned %d msg: %s\n\r", r, s.msg);
126 *lenp = s.next_out - (unsigned char *) dst;
130 /* Make a bi_rec in OF. We need to be passed a name for BI_BOOTLOADER_ID,
131 * a machine type for BI_MACHTYPE, and the location where the end of the
132 * bootloader is (PROG_START + PROG_SIZE)
134 void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
135 unsigned long progend)
137 unsigned long sysmap_size;
138 struct bi_record *rec;
140 /* Figure out the size of a possible System.map we're going to
143 sysmap_size = (unsigned long)(&__sysmap_end) -
144 (unsigned long)(&__sysmap_begin);
146 /* leave a 1MB gap then align to the next 1MB boundary */
147 addr = _ALIGN(addr+ (1<<20) - 1, (1<<20));
148 /* oldworld machine seem very unhappy about this. -- Tom */
150 claim(addr, 0x1000, 0);
152 rec = (struct bi_record *)addr;
154 rec->size = sizeof(struct bi_record);
155 rec = (struct bi_record *)((unsigned long)rec + rec->size);
157 rec->tag = BI_BOOTLOADER_ID;
158 sprintf( (char *)rec->data, name);
159 rec->size = sizeof(struct bi_record) + strlen(name) + 1;
160 rec = (struct bi_record *)((unsigned long)rec + rec->size);
162 rec->tag = BI_MACHTYPE;
165 rec->size = sizeof(struct bi_record) + 2 * sizeof(unsigned long);
166 rec = (struct bi_record *)((unsigned long)rec + rec->size);
169 rec->tag = BI_SYSMAP;
170 rec->data[0] = (unsigned long)(&__sysmap_begin);
171 rec->data[1] = sysmap_size;
172 rec->size = sizeof(struct bi_record) + 2 *
173 sizeof(unsigned long);
174 rec = (struct bi_record *)((unsigned long)rec + rec->size);
178 rec->size = sizeof(struct bi_record);
179 rec = (struct bi_record *)((unsigned long)rec + rec->size);