[PATCH] x86_64: clear_bss before set_intr_gate with early_idt_handler

[sfrench/cifs-2.6.git] / arch / x86_64 / kernel / head64.c

diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index b675c5add01ece1b5b9071940e25d0b714e4f536..cc230b93cd1c7081ea4483ac2aa8ec8192eb972a 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>
@@ -47,44 +45,26 @@ static void __init copy_bootdata(char *real_mode_data)
        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;
 }
 
 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();
+
+       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");
 
        /*
         * switch to init_level4_pgt from boot_level4_pgt
@@ -92,27 +72,13 @@ void __init x86_64_start_kernel(char * real_mode_data)
        memcpy(init_level4_pgt, boot_level4_pgt, PTRS_PER_PGD*sizeof(pgd_t));
        asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
 
+       for (i = 0; i < NR_CPUS; i++)
+               cpu_pda(i) = &boot_cpu_pda[i];
+
        pda_init(0);
        copy_bootdata(real_mode_data);
 #ifdef CONFIG_SMP
        cpu_set(0, cpu_online_map);
 #endif
-       s = strstr(saved_command_line, "earlyprintk=");
-       if (s != NULL)
-               setup_early_printk(s);
-#ifdef CONFIG_NUMA
-       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();
 }