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/simple/misc.c b/arch/ppc/boot/simple/misc.c
new file mode 100644
index 0000000..ab0f990
--- /dev/null
+++ b/arch/ppc/boot/simple/misc.c
@@ -0,0 +1,284 @@
+/*
+ * arch/ppc/simple/misc.c
+ *
+ * Misc. bootloader code for many machines. This assumes you have are using
+ * a 6xx/7xx/74xx CPU in your machine. This assumes the chunk of memory
+ * below 8MB is free. Finally, it assumes you have a NS16550-style uart for
+ * your serial console. If a machine meets these requirements, it can quite
+ * likely use this code during boot.
+ *
+ * Author: Matt Porter <mporter@mvista.com>
+ * Derived from arch/ppc/boot/prep/misc.c
+ *
+ * 2001 (c) MontaVista, Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/types.h>
+#include <linux/config.h>
+#include <linux/string.h>
+
+#include <asm/page.h>
+#include <asm/mmu.h>
+#include <asm/bootinfo.h>
+#ifdef CONFIG_44x
+#include <asm/ibm4xx.h>
+#endif
+#include <asm/reg.h>
+
+#include "nonstdio.h"
+
+/* Default cmdline */
+#ifdef CONFIG_CMDLINE
+#define CMDLINE CONFIG_CMDLINE
+#else
+#define CMDLINE ""
+#endif
+
+/* Keyboard (and VGA console)? */
+#ifdef CONFIG_VGA_CONSOLE
+#define HAS_KEYB 1
+#else
+#define HAS_KEYB 0
+#endif
+
+/* Will / Can the user give input?
+ * Val Henson has requested that Gemini doesn't wait for the
+ * user to edit the cmdline or not.
+ */
+#if (defined(CONFIG_SERIAL_8250_CONSOLE) \
+ || defined(CONFIG_VGA_CONSOLE) \
+ || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
+ || defined(CONFIG_SERIAL_MPSC_CONSOLE)) \
+ && !defined(CONFIG_GEMINI)
+#define INTERACTIVE_CONSOLE 1
+#endif
+
+char *avail_ram;
+char *end_avail;
+char *zimage_start;
+char cmd_preset[] = CMDLINE;
+char cmd_buf[256];
+char *cmd_line = cmd_buf;
+int keyb_present = HAS_KEYB;
+int zimage_size;
+
+unsigned long com_port;
+unsigned long initrd_size = 0;
+
+/* The linker tells us various locations in the image */
+extern char __image_begin, __image_end;
+extern char __ramdisk_begin, __ramdisk_end;
+extern char _end[];
+/* Original location */
+extern unsigned long start;
+
+extern int CRT_tstc(void);
+extern unsigned long serial_init(int chan, void *ignored);
+extern void serial_close(unsigned long com_port);
+extern void gunzip(void *, int, unsigned char *, int *);
+extern void serial_fixups(void);
+
+/* Allow get_mem_size to be hooked into. This is the default. */
+unsigned long __attribute__ ((weak))
+get_mem_size(void)
+{
+ return 0;
+}
+
+struct bi_record *
+decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum)
+{
+#ifdef INTERACTIVE_CONSOLE
+ int timer = 0;
+ char ch;
+#endif
+ char *cp;
+ struct bi_record *rec;
+ unsigned long initrd_loc = 0, TotalMemory = 0;
+
+#if defined(CONFIG_SERIAL_8250_CONSOLE) || defined(CONFIG_SERIAL_MPSC_CONSOLE)
+ com_port = serial_init(0, NULL);
+#endif
+
+#if defined(CONFIG_44x) && defined(PPC44x_EMAC0_MR0)
+ /* Reset MAL */
+ mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR);
+ /* Wait for reset */
+ while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {};
+ /* Reset EMAC */
+ *(volatile unsigned long *)PPC44x_EMAC0_MR0 = 0x20000000;
+ __asm__ __volatile__("eieio");
+#endif
+
+ /*
+ * Call get_mem_size(), which is memory controller dependent,
+ * and we must have the correct file linked in here.
+ */
+ TotalMemory = get_mem_size();
+
+ /* assume the chunk below 8M is free */
+ end_avail = (char *)0x00800000;
+
+ /*
+ * Reveal where we were loaded at and where we
+ * were relocated to.
+ */
+ puts("loaded at: "); puthex(load_addr);
+ puts(" "); puthex((unsigned long)(load_addr + (4*num_words)));
+ puts("\n");
+ if ( (unsigned long)load_addr != (unsigned long)&start )
+ {
+ puts("relocated to: "); puthex((unsigned long)&start);
+ puts(" ");
+ puthex((unsigned long)((unsigned long)&start + (4*num_words)));
+ puts("\n");
+ }
+
+ /*
+ * We link ourself to 0x00800000. When we run, we relocate
+ * ourselves there. So we just need __image_begin for the
+ * start. -- Tom
+ */
+ zimage_start = (char *)(unsigned long)(&__image_begin);
+ zimage_size = (unsigned long)(&__image_end) -
+ (unsigned long)(&__image_begin);
+
+ initrd_size = (unsigned long)(&__ramdisk_end) -
+ (unsigned long)(&__ramdisk_begin);
+
+ /*
+ * The zImage and initrd will be between start and _end, so they've
+ * already been moved once. We're good to go now. -- Tom
+ */
+ avail_ram = (char *)PAGE_ALIGN((unsigned long)_end);
+ puts("zimage at: "); puthex((unsigned long)zimage_start);
+ puts(" "); puthex((unsigned long)(zimage_size+zimage_start));
+ puts("\n");
+
+ if ( initrd_size ) {
+ puts("initrd at: ");
+ puthex((unsigned long)(&__ramdisk_begin));
+ puts(" "); puthex((unsigned long)(&__ramdisk_end));puts("\n");
+ }
+
+ avail_ram = (char *)0x00400000;
+ end_avail = (char *)0x00800000;
+ puts("avail ram: "); puthex((unsigned long)avail_ram); puts(" ");
+ puthex((unsigned long)end_avail); puts("\n");
+
+ if (keyb_present)
+ CRT_tstc(); /* Forces keyboard to be initialized */
+#ifdef CONFIG_GEMINI
+ /*
+ * If cmd_line is empty and cmd_preset is not, copy cmd_preset
+ * to cmd_line. This way we can override cmd_preset with the
+ * command line from Smon.
+ */
+
+ if ( (cmd_line[0] == '\0') && (cmd_preset[0] != '\0'))
+ memcpy (cmd_line, cmd_preset, sizeof(cmd_preset));
+#endif
+
+ /* Display standard Linux/PPC boot prompt for kernel args */
+ puts("\nLinux/PPC load: ");
+ cp = cmd_line;
+ memcpy (cmd_line, cmd_preset, sizeof(cmd_preset));
+ while ( *cp ) putc(*cp++);
+
+#ifdef INTERACTIVE_CONSOLE
+ /*
+ * If they have a console, allow them to edit the command line.
+ * Otherwise, don't bother wasting the five seconds.
+ */
+ while (timer++ < 5*1000) {
+ if (tstc()) {
+ while ((ch = getc()) != '\n' && ch != '\r') {
+ /* Test for backspace/delete */
+ if (ch == '\b' || ch == '\177') {
+ if (cp != cmd_line) {
+ cp--;
+ puts("\b \b");
+ }
+ /* Test for ^x/^u (and wipe the line) */
+ } else if (ch == '\030' || ch == '\025') {
+ while (cp != cmd_line) {
+ cp--;
+ puts("\b \b");
+ }
+ } else {
+ *cp++ = ch;
+ putc(ch);
+ }
+ }
+ break; /* Exit 'timer' loop */
+ }
+ udelay(1000); /* 1 msec */
+ }
+ *cp = 0;
+#endif
+ puts("\n");
+
+ puts("Uncompressing Linux...");
+ gunzip(0x0, 0x400000, zimage_start, &zimage_size);
+ puts("done.\n");
+
+ /* get the bi_rec address */
+ rec = bootinfo_addr(zimage_size);
+
+ /* We need to make sure that the initrd and bi_recs do not
+ * overlap. */
+ if ( initrd_size ) {
+ unsigned long rec_loc = (unsigned long) rec;
+ initrd_loc = (unsigned long)(&__ramdisk_begin);
+ /* If the bi_recs are in the middle of the current
+ * initrd, move the initrd to the next MB
+ * boundary. */
+ if ((rec_loc > initrd_loc) &&
+ ((initrd_loc + initrd_size) > rec_loc)) {
+ initrd_loc = _ALIGN((unsigned long)(zimage_size)
+ + (2 << 20) - 1, (2 << 20));
+ memmove((void *)initrd_loc, &__ramdisk_begin,
+ initrd_size);
+ puts("initrd moved: "); puthex(initrd_loc);
+ puts(" "); puthex(initrd_loc + initrd_size);
+ puts("\n");
+ }
+ }
+
+ bootinfo_init(rec);
+ if ( TotalMemory )
+ bootinfo_append(BI_MEMSIZE, sizeof(int), (void*)&TotalMemory);
+
+ bootinfo_append(BI_CMD_LINE, strlen(cmd_line)+1, (void*)cmd_line);
+
+ /* add a bi_rec for the initrd if it exists */
+ if (initrd_size) {
+ unsigned long initrd[2];
+
+ initrd[0] = initrd_loc;
+ initrd[1] = initrd_size;
+
+ bootinfo_append(BI_INITRD, sizeof(initrd), &initrd);
+ }
+ puts("Now booting the kernel\n");
+ serial_close(com_port);
+
+ return rec;
+}
+
+void __attribute__ ((weak))
+board_isa_init(void)
+{
+}
+
+/* Allow decompress_kernel to be hooked into. This is the default. */
+void * __attribute__ ((weak))
+load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
+ void *ign1, void *ign2)
+{
+ board_isa_init();
+ return decompress_kernel(load_addr, num_words, cksum);
+}