[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / arch / ppc / boot / openfirmware / common.c
blob9e6952781f1f03729c9500753ad07a0f79a08848
1 /*
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.
8 */
10 #include "nonstdio.h"
11 #include "of1275.h"
12 #include <linux/string.h>
13 #include <linux/zlib.h>
14 #include <asm/bootinfo.h>
15 #include <asm/page.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;
26 struct memchunk {
27 unsigned int size;
28 struct memchunk *next;
31 static struct memchunk *freechunks;
33 static void *zalloc(unsigned size)
35 void *p;
36 struct memchunk **mpp, *mp;
38 size = (size + 7) & -8;
39 heap_use += size;
40 if (heap_use > heap_max)
41 heap_max = heap_use;
42 for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
43 if (mp->size == size) {
44 *mpp = mp->next;
45 return mp;
48 p = avail_ram;
49 avail_ram += size;
50 if (avail_ram > avail_high)
51 avail_high = avail_ram;
52 if (avail_ram > end_avail) {
53 printf("oops... out of memory\n\r");
54 pause();
56 return p;
59 #define HEAD_CRC 2
60 #define EXTRA_FIELD 4
61 #define ORIG_NAME 8
62 #define COMMENT 0x10
63 #define RESERVED 0xe0
65 void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
67 z_stream s;
68 int r, i, flags;
70 /* skip header */
71 i = 10;
72 flags = src[3];
73 if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
74 printf("bad gzipped data\n\r");
75 exit();
77 if ((flags & EXTRA_FIELD) != 0)
78 i = 12 + src[10] + (src[11] << 8);
79 if ((flags & ORIG_NAME) != 0)
80 while (src[i++] != 0)
82 if ((flags & COMMENT) != 0)
83 while (src[i++] != 0)
85 if ((flags & HEAD_CRC) != 0)
86 i += 2;
87 if (i >= *lenp) {
88 printf("gunzip: ran out of data in header\n\r");
89 exit();
92 /* Initialize ourself. */
93 s.workspace = zalloc(zlib_inflate_workspacesize());
94 r = zlib_inflateInit2(&s, -MAX_WBITS);
95 if (r != Z_OK) {
96 printf("zlib_inflateInit2 returned %d\n\r", r);
97 exit();
99 s.next_in = src + i;
100 s.avail_in = *lenp - i;
101 s.next_out = dst;
102 s.avail_out = dstlen;
103 r = zlib_inflate(&s, Z_FINISH);
104 if (r != Z_OK && r != Z_STREAM_END) {
105 printf("inflate returned %d msg: %s\n\r", r, s.msg);
106 exit();
108 *lenp = s.next_out - (unsigned char *) dst;
109 zlib_inflateEnd(&s);
112 /* Make a bi_rec in OF. We need to be passed a name for BI_BOOTLOADER_ID,
113 * a machine type for BI_MACHTYPE, and the location where the end of the
114 * bootloader is (PROG_START + PROG_SIZE)
116 void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
117 unsigned long progend)
119 unsigned long sysmap_size;
120 struct bi_record *rec;
122 /* Figure out the size of a possible System.map we're going to
123 * pass along.
124 * */
125 sysmap_size = (unsigned long)(&__sysmap_end) -
126 (unsigned long)(&__sysmap_begin);
128 /* leave a 1MB gap then align to the next 1MB boundary */
129 addr = _ALIGN(addr+ (1<<20) - 1, (1<<20));
130 /* oldworld machine seem very unhappy about this. -- Tom */
131 if (addr >= progend)
132 claim(addr, 0x1000, 0);
134 rec = (struct bi_record *)addr;
135 rec->tag = BI_FIRST;
136 rec->size = sizeof(struct bi_record);
137 rec = (struct bi_record *)((unsigned long)rec + rec->size);
139 rec->tag = BI_BOOTLOADER_ID;
140 sprintf( (char *)rec->data, name);
141 rec->size = sizeof(struct bi_record) + strlen(name) + 1;
142 rec = (struct bi_record *)((unsigned long)rec + rec->size);
144 rec->tag = BI_MACHTYPE;
145 rec->data[0] = mach;
146 rec->data[1] = 1;
147 rec->size = sizeof(struct bi_record) + 2 * sizeof(unsigned long);
148 rec = (struct bi_record *)((unsigned long)rec + rec->size);
150 if (sysmap_size) {
151 rec->tag = BI_SYSMAP;
152 rec->data[0] = (unsigned long)(&__sysmap_begin);
153 rec->data[1] = sysmap_size;
154 rec->size = sizeof(struct bi_record) + 2 *
155 sizeof(unsigned long);
156 rec = (struct bi_record *)((unsigned long)rec + rec->size);
159 rec->tag = BI_LAST;
160 rec->size = sizeof(struct bi_record);
161 rec = (struct bi_record *)((unsigned long)rec + rec->size);