1 files changed, 162 insertions, 0 deletions

diff --git a/arch/ppc/boot/openfirmware/common.c b/arch/ppc/boot/openfirmware/common.c
new file mode 100644
index 000000000000..9e6952781f1f
--- /dev/null
+++ b/arch/ppc/boot/openfirmware/common.c
@@ -0,0 +1,162 @@
+/*
+ * 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 "of1275.h"
+#include <linux/string.h>
+#include <linux/zlib.h>
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+
+/* Information from the linker */
+extern char __sysmap_begin, __sysmap_end;
+
+extern int strcmp(const char *s1, const char *s2);
+extern char *avail_ram, *avail_high;
+extern char *end_avail;
+
+unsigned int heap_use, heap_max;
+
+struct memchunk {
+    unsigned int size;
+    struct memchunk *next;
+};
+
+static struct memchunk *freechunks;
+
+static void *zalloc(unsigned size)
+{
+    void *p;
+    struct memchunk **mpp, *mp;
+
+    size = (size + 7) & -8;
+    heap_use += size;
+    if (heap_use > heap_max)
+        heap_max = heap_use;
+    for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
+        if (mp->size == size) {
+            *mpp = mp->next;
+            return mp;
+        }
+    }
+    p = avail_ram;
+    avail_ram += size;
+    if (avail_ram > avail_high)
+        avail_high = avail_ram;
+    if (avail_ram > end_avail) {
+        printf("oops... out of memory\n\r");
+        pause();
+    }
+    return p;
+}
+
+#define HEAD_CRC        2
+#define EXTRA_FIELD     4
+#define ORIG_NAME       8
+#define COMMENT         0x10
+#define RESERVED        0xe0
+
+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] != Z_DEFLATED || (flags & RESERVED) != 0) {
+                printf("bad gzipped data\n\r");
+                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\r");
+                exit();
+        }
+
+        /* Initialize ourself. */
+        s.workspace = zalloc(zlib_inflate_workspacesize());
+        r = zlib_inflateInit2(&s, -MAX_WBITS);
+        if (r != Z_OK) {
+                printf("zlib_inflateInit2 returned %d\n\r", r);
+                exit();
+        }
+        s.next_in = src + i;
+        s.avail_in = *lenp - i;
+        s.next_out = dst;
+        s.avail_out = dstlen;
+        r = zlib_inflate(&s, Z_FINISH);
+        if (r != Z_OK && r != Z_STREAM_END) {
+                printf("inflate returned %d msg: %s\n\r", r, s.msg);
+                exit();
+        }
+        *lenp = s.next_out - (unsigned char *) dst;
+        zlib_inflateEnd(&s);
+}
+
+/* Make a bi_rec in OF.  We need to be passed a name for BI_BOOTLOADER_ID,
+ * a machine type for BI_MACHTYPE, and the location where the end of the
+ * bootloader is (PROG_START + PROG_SIZE)
+ */
+void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
+                unsigned long progend)
+{
+        unsigned long sysmap_size;
+        struct bi_record *rec;
+
+        /* Figure out the size of a possible System.map we're going to
+         * pass along.
+         * */
+        sysmap_size = (unsigned long)(&__sysmap_end) -
+                (unsigned long)(&__sysmap_begin);
+
+        /* leave a 1MB gap then align to the next 1MB boundary */
+        addr = _ALIGN(addr+ (1<<20) - 1, (1<<20));
+        /* oldworld machine seem very unhappy about this. -- Tom */
+        if (addr >= progend)
+                claim(addr, 0x1000, 0);
+
+        rec = (struct bi_record *)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, name);
+        rec->size = sizeof(struct bi_record) + strlen(name) + 1;
+        rec = (struct bi_record *)((unsigned long)rec + rec->size);
+
+        rec->tag = BI_MACHTYPE;
+        rec->data[0] = mach;
+        rec->data[1] = 1;
+        rec->size = sizeof(struct bi_record) + 2 * sizeof(unsigned long);
+        rec = (struct bi_record *)((unsigned long)rec + rec->size);
+
+        if (sysmap_size) {
+                rec->tag = BI_SYSMAP;
+                rec->data[0] = (unsigned long)(&__sysmap_begin);
+                rec->data[1] = sysmap_size;
+                rec->size = sizeof(struct bi_record) + 2 *
+                        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);
+}