/*
- * linux/arch/x86_64/kernel/head64.c -- prepare to run common code
+ * prepare to run common code
*
* Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/percpu.h>
+#include <linux/start_kernel.h>
+#include <linux/io.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>
+#include <asm/kdebug.h>
+#include <asm/e820.h>
+#include <asm/bios_ebda.h>
+#include <asm/trampoline.h>
static void __init zap_identity_mappings(void)
{
pgd_t *pgd = pgd_offset_k(0UL);
pgd_clear(pgd);
- __flush_tlb();
+ __flush_tlb_all();
}
/* Don't add a printk in there. printk relies on the PDA which is not initialized
(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);
+ memcpy(&boot_params, real_mode_data, sizeof boot_params);
+ if (boot_params.hdr.cmd_line_ptr) {
+ command_line = __va(boot_params.hdr.cmd_line_ptr);
+ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
}
- 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;
+ /*
+ * Build-time sanity checks on the kernel image and module
+ * area mappings. (these are purely build-time and produce no code)
+ */
+ BUILD_BUG_ON(MODULES_VADDR < KERNEL_IMAGE_START);
+ BUILD_BUG_ON(MODULES_VADDR-KERNEL_IMAGE_START < KERNEL_IMAGE_SIZE);
+ BUILD_BUG_ON(MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE);
+ BUILD_BUG_ON((KERNEL_IMAGE_START & ~PMD_MASK) != 0);
+ BUILD_BUG_ON((MODULES_VADDR & ~PMD_MASK) != 0);
+ BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
+ BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
+ (__START_KERNEL & PGDIR_MASK)));
+ BUILD_BUG_ON(__fix_to_virt(__end_of_fixed_addresses) <= MODULES_END);
+
/* 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++)
+ /* Cleanup the over mapped high alias */
+ cleanup_highmap();
+
+ for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) {
+#ifdef CONFIG_EARLY_PRINTK
+ set_intr_gate(i, &early_idt_handlers[i]);
+#else
set_intr_gate(i, early_idt_handler);
- asm volatile("lidt %0" :: "m" (idt_descr));
+#endif
+ }
+ load_idt((const struct desc_ptr *)&idt_descr);
- early_printk("Kernel alive\n");
+ if (console_loglevel == 10)
+ early_printk("Kernel alive\n");
- for (i = 0; i < NR_CPUS; i++)
- cpu_pda(i) = &boot_cpu_pda[i];
+ x86_64_start_reservations(real_mode_data);
+}
- pda_init(0);
+void __init x86_64_start_reservations(char *real_mode_data)
+{
copy_bootdata(__va(real_mode_data));
-#ifdef CONFIG_SMP
- cpu_set(0, cpu_online_map);
+
+ reserve_trampoline_memory();
+
+ reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /* Reserve INITRD */
+ if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+ unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+ unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
+ unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
+ reserve_early(ramdisk_image, ramdisk_end, "RAMDISK");
+ }
#endif
+
+ reserve_ebda_region();
+
+ /*
+ * At this point everything still needed from the boot loader
+ * or BIOS or kernel text should be early reserved or marked not
+ * RAM in e820. All other memory is free game.
+ */
+
start_kernel();
}