835c34a168
Since the x86 merge, lots of files that referenced their own filenames are no longer correct. Rather than keep them up to date, just delete them, as they add no real value. Additionally: - fix up comment formatting in scx200_32.c - Remove a credit from myself in setup_64.c from a time when we had no SCM - remove longwinded history from tsc_32.c which can be figured out from git. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/*
|
|
* prepare to run common code
|
|
*
|
|
* Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
|
|
*/
|
|
|
|
#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>
|
|
#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)
|
|
{
|
|
memset(__bss_start, 0,
|
|
(unsigned long) __bss_stop - (unsigned long) __bss_start);
|
|
}
|
|
|
|
#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
|
|
#define OLD_CL_MAGIC_ADDR 0x20
|
|
#define OLD_CL_MAGIC 0xA33F
|
|
#define OLD_CL_OFFSET 0x22
|
|
|
|
static void __init copy_bootdata(char *real_mode_data)
|
|
{
|
|
unsigned long new_data;
|
|
char * command_line;
|
|
|
|
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 *)(real_mode_data + OLD_CL_MAGIC_ADDR)) {
|
|
return;
|
|
}
|
|
new_data = __pa(real_mode_data) + *(u16 *)(real_mode_data + OLD_CL_OFFSET);
|
|
}
|
|
command_line = __va(new_data);
|
|
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
|
|
}
|
|
|
|
void __init x86_64_start_kernel(char * real_mode_data)
|
|
{
|
|
int 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));
|
|
|
|
early_printk("Kernel alive\n");
|
|
|
|
for (i = 0; i < NR_CPUS; i++)
|
|
cpu_pda(i) = &boot_cpu_pda[i];
|
|
|
|
pda_init(0);
|
|
copy_bootdata(__va(real_mode_data));
|
|
#ifdef CONFIG_SMP
|
|
cpu_set(0, cpu_online_map);
|
|
#endif
|
|
start_kernel();
|
|
}
|