74 lines
1.4 KiB
ArmAsm
74 lines
1.4 KiB
ArmAsm
#include "kernel/kernel.h" /* configures the kernel */
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/com.h>
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#include <machine/asm.h>
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#include <machine/interrupt.h>
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#include "archconst.h"
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#include "kernel/const.h"
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#include "kernel/proc.h"
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#include "sconst.h"
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#include <machine/multiboot.h>
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#define GDT_SET_ENTRY(selector, base, limit) \
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mov %ebp, %edi; \
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add $(_C_LABEL(gdt) + selector), %edi; \
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mov base, %eax; \
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movw %ax, 2(%edi); \
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shr $16, %eax; \
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movb %al, 4(%edi); \
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and $0xff00, %ax; \
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andw $0xff, 6(%edi); \
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or %ax, 6(%edi); \
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mov limit, %eax; \
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movw %ax, (%edi); \
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shr $16, %eax; \
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and $0xf, %ax; \
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andb $0xf0, 6(%edi); \
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or %ax, 6(%edi); \
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IMPORT(pre_init)
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.extern kernel_init
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ENTRY(multiboot_init)
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mov $(GDT_SIZE*DESC_SIZE), %eax
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mov $(_C_LABEL(gdt) + GDT_SELECTOR), %edi
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mov %ax, (%edi)
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mov $_C_LABEL(gdt), %eax
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mov %eax, 2(%edi)
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lgdt (%edi)
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ljmp $(CS_SELECTOR), $reload_cs
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reload_cs:
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mov $DS_SELECTOR, %eax
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mov %eax, %ds
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mov %eax, %ss
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mov %eax, %es
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mov %eax, %fs
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mov %eax, %gs
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mov $(multiboot_stack + MULTIBOOT_STACK_SIZE), %esp
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push %ebx
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call _C_LABEL(pre_init)
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add $4, %esp
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/* return to old boot code of kernel */
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push %eax
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push $MULTIBOOT_PARAM_BUF_SIZE
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push $_C_LABEL(multiboot_param_buf)
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push $0
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mov $ES_SELECTOR, %eax
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mov %eax, %es
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jmp kernel_init
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.data
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LABEL(multiboot_param_buf)
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.space MULTIBOOT_PARAM_BUF_SIZE
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multiboot_stack:
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.space MULTIBOOT_STACK_SIZE + 4
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