Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 117 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
new file mode 100644
index 000000000000..6cad46c98a23
--- /dev/null
+++ b/arch/x86_64/kernel/head64.c
@@ -0,0 +1,117 @@
+/*
+ *  linux/arch/x86_64/kernel/head64.c -- prepare to run common code
+ *
+ *  Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
+ *
+ *  $Id: head64.c,v 1.22 2001/07/06 14:28:20 ak Exp $
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/percpu.h>
+
+#include <asm/processor.h>
+#include <asm/proto.h>
+#include <asm/smp.h>
+#include <asm/bootsetup.h>
+#include <asm/setup.h>
+#include <asm/desc.h>
+
+/* Don't add a printk in there. printk relies on the PDA which is not initialized 
+   yet. */
+static void __init clear_bss(void)
+{
+        extern char __bss_start[], __bss_end[];
+        memset(__bss_start, 0,
+               (unsigned long) __bss_end - (unsigned long) __bss_start);
+}
+
+extern char x86_boot_params[2048];
+
+#define NEW_CL_POINTER          0x228   /* Relative to real mode data */
+#define OLD_CL_MAGIC_ADDR       0x90020
+#define OLD_CL_MAGIC            0xA33F
+#define OLD_CL_BASE_ADDR        0x90000
+#define OLD_CL_OFFSET           0x90022
+
+extern char saved_command_line[];
+
+static void __init copy_bootdata(char *real_mode_data)
+{
+        int new_data;
+        char * command_line;
+
+        memcpy(x86_boot_params, real_mode_data, 2048); 
+        new_data = *(int *) (x86_boot_params + NEW_CL_POINTER);
+        if (!new_data) {
+                if (OLD_CL_MAGIC != * (u16 *) OLD_CL_MAGIC_ADDR) {
+                        printk("so old bootloader that it does not support commandline?!\n");
+                        return;
+                }
+                new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
+                printk("old bootloader convention, maybe loadlin?\n");
+        }
+        command_line = (char *) ((u64)(new_data));
+        memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+        printk("Bootdata ok (command line is %s)\n", saved_command_line);       
+}
+
+static void __init setup_boot_cpu_data(void)
+{
+        unsigned int dummy, eax;
+
+        /* get vendor info */
+        cpuid(0, (unsigned int *)&boot_cpu_data.cpuid_level,
+              (unsigned int *)&boot_cpu_data.x86_vendor_id[0],
+              (unsigned int *)&boot_cpu_data.x86_vendor_id[8],
+              (unsigned int *)&boot_cpu_data.x86_vendor_id[4]);
+
+        /* get cpu type */
+        cpuid(1, &eax, &dummy, &dummy,
+                (unsigned int *) &boot_cpu_data.x86_capability);
+        boot_cpu_data.x86 = (eax >> 8) & 0xf;
+        boot_cpu_data.x86_model = (eax >> 4) & 0xf;
+        boot_cpu_data.x86_mask = eax & 0xf;
+}
+
+extern char _end[];
+
+void __init x86_64_start_kernel(char * real_mode_data)
+{
+        char *s;
+        int i;
+
+        for (i = 0; i < 256; i++)
+                set_intr_gate(i, early_idt_handler);
+        asm volatile("lidt %0" :: "m" (idt_descr));
+        clear_bss();
+        pda_init(0);
+        copy_bootdata(real_mode_data);
+#ifdef CONFIG_SMP
+        cpu_set(0, cpu_online_map);
+#endif
+        /* default console: */
+        if (!strstr(saved_command_line, "console="))
+                strcat(saved_command_line, " console=tty0"); 
+        s = strstr(saved_command_line, "earlyprintk=");
+        if (s != NULL)
+                setup_early_printk(s);
+#ifdef CONFIG_DISCONTIGMEM
+        s = strstr(saved_command_line, "numa=");
+        if (s != NULL)
+                numa_setup(s+5);
+#endif
+#ifdef CONFIG_X86_IO_APIC
+        if (strstr(saved_command_line, "disableapic"))
+                disable_apic = 1;
+#endif
+        /* You need early console to see that */
+        if (__pa_symbol(&_end) >= KERNEL_TEXT_SIZE)
+                panic("Kernel too big for kernel mapping\n");
+
+        setup_boot_cpu_data();
+        start_kernel();
+}