Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/ppc/boot/openfirmware/chrpmain.c b/arch/ppc/boot/openfirmware/chrpmain.c
new file mode 100644
index 0000000..6fb4f73
--- /dev/null
+++ b/arch/ppc/boot/openfirmware/chrpmain.c
@@ -0,0 +1,101 @@
+/*
+ * 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 <linux/string.h>
+#include "nonstdio.h"
+#include "of1275.h"
+#include <asm/processor.h>
+#include <asm/page.h>
+
+/* Passed from the linker */
+extern char __image_begin, __image_end;
+extern char __ramdisk_begin, __ramdisk_end;
+extern char _start, _end;
+
+extern unsigned int heap_max;
+extern void flush_cache(void *, unsigned long);
+extern void gunzip(void *, int, unsigned char *, int *);
+extern void make_bi_recs(unsigned long addr, char *name, unsigned int mach,
+ unsigned int progend);
+
+char *avail_ram;
+char *begin_avail, *end_avail;
+char *avail_high;
+
+#define RAM_START 0x00000000
+#define RAM_END (64<<20)
+
+#define BOOT_START ((unsigned long)_start)
+#define BOOT_END ((unsigned long)(_end + 0xFFF) & ~0xFFF)
+
+#define RAM_FREE ((unsigned long)(_end+0x1000)&~0xFFF)
+#define PROG_START 0x00010000
+#define PROG_SIZE 0x007f0000 /* 8MB */
+
+#define SCRATCH_SIZE (128 << 10)
+
+static char scratch[SCRATCH_SIZE]; /* 1MB of scratch space for gunzip */
+
+typedef void (*kernel_start_t)(int, int, void *, unsigned int, unsigned int);
+
+void
+boot(int a1, int a2, void *prom)
+{
+ unsigned sa, len;
+ void *dst;
+ unsigned char *im;
+ unsigned int initrd_size, initrd_start;
+
+ printf("chrpboot starting: loaded at 0x%p\n\r", &_start);
+
+ initrd_size = &__ramdisk_end - &__ramdisk_begin;
+ if (initrd_size) {
+ initrd_start = (RAM_END - initrd_size) & ~0xFFF;
+ a1 = initrd_start;
+ a2 = initrd_size;
+ claim(initrd_start, RAM_END - initrd_start, 0);
+ printf("initial ramdisk moving 0x%x <- 0x%p (%x bytes)\n\r",
+ initrd_start, &__ramdisk_begin, initrd_size);
+ memcpy((char *)initrd_start, &__ramdisk_begin, initrd_size);
+ } else {
+ initrd_start = 0;
+ initrd_size = 0;
+ a2 = 0xdeadbeef;
+ }
+
+ im = &__image_begin;
+ len = &__image_end - &__image_begin;
+ /* claim 4MB starting at PROG_START */
+ claim(PROG_START, PROG_SIZE - PROG_START, 0);
+ dst = (void *) PROG_START;
+ if (im[0] == 0x1f && im[1] == 0x8b) {
+ avail_ram = scratch;
+ begin_avail = avail_high = avail_ram;
+ end_avail = scratch + sizeof(scratch);
+ printf("gunzipping (0x%p <- 0x%p:0x%p)...", dst, im, im+len);
+ gunzip(dst, 0x400000, im, &len);
+ printf("done %u bytes\n\r", len);
+ printf("%u bytes of heap consumed, max in use %u\n\r",
+ avail_high - begin_avail, heap_max);
+ } else {
+ memmove(dst, im, len);
+ }
+
+ flush_cache(dst, len);
+ make_bi_recs(((unsigned long) dst + len), "chrpboot", _MACH_chrp,
+ (PROG_START + PROG_SIZE));
+
+ sa = PROG_START;
+ printf("start address = 0x%x\n\r", sa);
+
+ (*(kernel_start_t)sa)(a1, a2, prom, initrd_start, initrd_size);
+
+ printf("returned?\n\r");
+
+ pause();
+}