2 * prepare to run common code
4 * Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
7 #include <linux/init.h>
8 #include <linux/linkage.h>
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/string.h>
12 #include <linux/percpu.h>
13 #include <linux/start_kernel.h>
15 #include <asm/processor.h>
16 #include <asm/proto.h>
18 #include <asm/setup.h>
20 #include <asm/pgtable.h>
21 #include <asm/tlbflush.h>
22 #include <asm/sections.h>
23 #include <asm/kdebug.h>
25 static void __init
zap_identity_mappings(void)
27 pgd_t
*pgd
= pgd_offset_k(0UL);
32 /* Don't add a printk in there. printk relies on the PDA which is not initialized
34 static void __init
clear_bss(void)
36 memset(__bss_start
, 0,
37 (unsigned long) __bss_stop
- (unsigned long) __bss_start
);
40 static void __init
copy_bootdata(char *real_mode_data
)
44 memcpy(&boot_params
, real_mode_data
, sizeof boot_params
);
45 if (boot_params
.hdr
.cmd_line_ptr
) {
46 command_line
= __va(boot_params
.hdr
.cmd_line_ptr
);
47 memcpy(boot_command_line
, command_line
, COMMAND_LINE_SIZE
);
51 void __init
x86_64_start_kernel(char * real_mode_data
)
55 /* clear bss before set_intr_gate with early_idt_handler */
58 /* Make NULL pointers segfault */
59 zap_identity_mappings();
61 for (i
= 0; i
< IDT_ENTRIES
; i
++) {
62 #ifdef CONFIG_EARLY_PRINTK
63 set_intr_gate(i
, &early_idt_handlers
[i
]);
65 set_intr_gate(i
, early_idt_handler
);
68 load_idt((const struct desc_ptr
*)&idt_descr
);
70 early_printk("Kernel alive\n");
72 for (i
= 0; i
< NR_CPUS
; i
++)
73 cpu_pda(i
) = &boot_cpu_pda
[i
];
76 copy_bootdata(__va(real_mode_data
));
This page took 0.035763 seconds and 5 git commands to generate.