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.
12 #include <linux/string.h>
13 #include <linux/zlib.h>
14 #include <asm/bootinfo.h>
17 /* Information from the linker */
19 extern int strcmp(const char *s1, const char *s2);
20 extern char *avail_ram, *avail_high;
21 extern char *end_avail;
23 unsigned int heap_use, heap_max;
27 struct memchunk *next;
30 static struct memchunk *freechunks;
32 static void *zalloc(unsigned size)
35 struct memchunk **mpp, *mp;
37 size = (size + 7) & -8;
39 if (heap_use > heap_max)
41 for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
42 if (mp->size == size) {
49 if (avail_ram > avail_high)
50 avail_high = avail_ram;
51 if (avail_ram > end_avail) {
52 printf("oops... out of memory\n\r");
64 void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
72 if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
73 printf("bad gzipped data\n\r");
76 if ((flags & EXTRA_FIELD) != 0)
77 i = 12 + src[10] + (src[11] << 8);
78 if ((flags & ORIG_NAME) != 0)
81 if ((flags & COMMENT) != 0)
84 if ((flags & HEAD_CRC) != 0)
87 printf("gunzip: ran out of data in header\n\r");
91 /* Initialize ourself. */
92 s.workspace = zalloc(zlib_inflate_workspacesize());
93 r = zlib_inflateInit2(&s, -MAX_WBITS);
95 printf("zlib_inflateInit2 returned %d\n\r", r);
99 s.avail_in = *lenp - i;
101 s.avail_out = dstlen;
102 r = zlib_inflate(&s, Z_FINISH);
103 if (r != Z_OK && r != Z_STREAM_END) {
104 printf("inflate returned %d msg: %s\n\r", r, s.msg);
107 *lenp = s.next_out - (unsigned char *) dst;
111 /* Make a bi_rec in OF. We need to be passed a name for BI_BOOTLOADER_ID,
112 * a machine type for BI_MACHTYPE, and the location where the end of the
113 * bootloader is (PROG_START + PROG_SIZE)
115 void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
116 unsigned long progend)
118 struct bi_record *rec;
121 /* leave a 1MB gap then align to the next 1MB boundary */
122 addr = _ALIGN(addr+ (1<<20) - 1, (1<<20));
123 /* oldworld machine seem very unhappy about this. -- Tom */
125 claim(addr, 0x1000, 0);
127 rec = (struct bi_record *)addr;
129 rec->size = sizeof(struct bi_record);
130 rec = (struct bi_record *)((unsigned long)rec + rec->size);
132 rec->tag = BI_BOOTLOADER_ID;
133 sprintf( (char *)rec->data, name);
134 rec->size = sizeof(struct bi_record) + strlen(name) + 1;
135 rec = (struct bi_record *)((unsigned long)rec + rec->size);
137 rec->tag = BI_MACHTYPE;
140 rec->size = sizeof(struct bi_record) + 2 * sizeof(unsigned long);
141 rec = (struct bi_record *)((unsigned long)rec + rec->size);
144 rec->size = sizeof(struct bi_record);
145 rec = (struct bi_record *)((unsigned long)rec + rec->size);