x86_64: fix section mismatch warning in hpet.c

[safe/jmp/linux-2.6] / arch / x86_64 / kernel / head64.c

diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index 6cad46c..6c34bdd 100644 (file)
--- a/arch/x86_64/kernel/head64.c
+++ b/arch/x86_64/kernel/head64.c
@@ -2,8 +2,6 @@
  *  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>
@@ -19,99 +17,70 @@
 #include <asm/bootsetup.h>
 #include <asm/setup.h>
 #include <asm/desc.h>
+#include <asm/pgtable.h>
+#include <asm/tlbflush.h>
+#include <asm/sections.h>
+
+static void __init zap_identity_mappings(void)
+{
+       pgd_t *pgd = pgd_offset_k(0UL);
+       pgd_clear(pgd);
+       __flush_tlb();
+}
 
 /* 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);
+              (unsigned long) __bss_stop - (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_ADDR      0x20
 #define OLD_CL_MAGIC            0xA33F
-#define OLD_CL_BASE_ADDR        0x90000
-#define OLD_CL_OFFSET           0x90022
-
-extern char saved_command_line[];
+#define OLD_CL_OFFSET           0x22
 
 static void __init copy_bootdata(char *real_mode_data)
 {
-       int new_data;
+       unsigned long new_data;
        char * command_line;
 
-       memcpy(x86_boot_params, real_mode_data, 2048); 
-       new_data = *(int *) (x86_boot_params + NEW_CL_POINTER);
+       memcpy(x86_boot_params, real_mode_data, BOOT_PARAM_SIZE);
+       new_data = *(u32 *) (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");
+               if (OLD_CL_MAGIC != *(u16 *)(real_mode_data + OLD_CL_MAGIC_ADDR)) {
                        return;
                }
-               new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
-               printk("old bootloader convention, maybe loadlin?\n");
+               new_data = __pa(real_mode_data) + *(u16 *)(real_mode_data + OLD_CL_OFFSET);
        }
-       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;
+       command_line = __va(new_data);
+       memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 }
 
-extern char _end[];
-
 void __init x86_64_start_kernel(char * real_mode_data)
 {
-       char *s;
        int i;
 
-       for (i = 0; i < 256; i++)
+       /* clear bss before set_intr_gate with early_idt_handler */
+       clear_bss();
+
+       /* Make NULL pointers segfault */
+       zap_identity_mappings();
+
+       for (i = 0; i < IDT_ENTRIES; i++)
                set_intr_gate(i, early_idt_handler);
        asm volatile("lidt %0" :: "m" (idt_descr));
-       clear_bss();
+
+       early_printk("Kernel alive\n");
+
+       for (i = 0; i < NR_CPUS; i++)
+               cpu_pda(i) = &boot_cpu_pda[i];
+
        pda_init(0);
-       copy_bootdata(real_mode_data);
+       copy_bootdata(__va(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();
 }