diff options
author | Stefan Reinauer <stepan@coreboot.org> | 2010-12-11 20:33:41 +0000 |
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committer | Stefan Reinauer <stepan@openbios.org> | 2010-12-11 20:33:41 +0000 |
commit | 8677a23d5b053d550f70246de9c7dc8fd4e2fbf9 (patch) | |
tree | d9a7c6042de85d623739e2679ba90c66aad2797f /src/arch/i386/lib/c_start.S | |
parent | 198cb96387c457affa01696405ffaa4531e8e361 (diff) |
After this has been brought up many times before, rename src/arch/i386 to
src/arch/x86.
Signed-off-by: Stefan Reinauer <stepan@coreboot.org>
Acked-by: Patrick Georgi <patrick@georgi-clan.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6161 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/arch/i386/lib/c_start.S')
-rw-r--r-- | src/arch/i386/lib/c_start.S | 317 |
1 files changed, 0 insertions, 317 deletions
diff --git a/src/arch/i386/lib/c_start.S b/src/arch/i386/lib/c_start.S deleted file mode 100644 index 94ce4a70c3..0000000000 --- a/src/arch/i386/lib/c_start.S +++ /dev/null @@ -1,317 +0,0 @@ -#include <cpu/x86/post_code.h> - - .section ".text" - .code32 - .globl _start -_start: - cli - lgdt %cs:gdtaddr - ljmp $0x10, $1f -1: movl $0x18, %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %ss - movl %eax, %fs - movl %eax, %gs - - post_code(0x13) /* post 13 */ - - /** clear stack */ - cld - leal _stack, %edi - movl $_estack, %ecx - subl %edi, %ecx - shrl $2, %ecx /* it is 32 bit aligned, right? */ - xorl %eax, %eax - rep - stosl - - /** clear bss */ - leal _bss, %edi - movl $_ebss, %ecx - subl %edi, %ecx - jz .Lnobss - shrl $2, %ecx /* it is 32 bit aligned, right? */ - xorl %eax, %eax - rep - stosl -.Lnobss: - - /* set new stack */ - movl $_estack, %esp - - /* Push the cpu index and struct cpu */ - pushl $0 - pushl $0 - - /* push the boot_complete flag */ - pushl %ebp - - /* Save the stack location */ - movl %esp, %ebp - - /* Initialize the Interrupt Descriptor table */ - leal _idt, %edi - leal vec0, %ebx - movl $(0x10 << 16), %eax /* cs selector */ - -1: movw %bx, %ax - movl %ebx, %edx - movw $0x8E00, %dx /* Interrupt gate - dpl=0, present */ - movl %eax, 0(%edi) - movl %edx, 4(%edi) - addl $6, %ebx - addl $8, %edi - cmpl $_idt_end, %edi - jne 1b - - /* Load the Interrupt descriptor table */ - lidt idtarg - - /* - * Now we are finished. Memory is up, data is copied and - * bss is cleared. Now we call the main routine and - * let it do the rest. - */ - post_code(0xfe) /* post fe */ - - /* Restore the stack location */ - movl %ebp, %esp - - /* The boot_complete flag has already been pushed */ - call hardwaremain - /* NOTREACHED */ -.Lhlt: - post_code(0xee) /* post ee */ - hlt - jmp .Lhlt - -vec0: - pushl $0 /* error code */ - pushl $0 /* vector */ - jmp int_hand -vec1: - pushl $0 /* error code */ - pushl $1 /* vector */ - jmp int_hand - -vec2: - pushl $0 /* error code */ - pushl $2 /* vector */ - jmp int_hand - -vec3: - pushl $0 /* error code */ - pushl $3 /* vector */ - jmp int_hand - -vec4: - pushl $0 /* error code */ - pushl $4 /* vector */ - jmp int_hand - -vec5: - pushl $0 /* error code */ - pushl $5 /* vector */ - jmp int_hand - -vec6: - pushl $0 /* error code */ - pushl $6 /* vector */ - jmp int_hand - -vec7: - pushl $0 /* error code */ - pushl $7 /* vector */ - jmp int_hand - -vec8: - /* error code */ - pushl $8 /* vector */ - jmp int_hand - .word 0x9090 - -vec9: - pushl $0 /* error code */ - pushl $9 /* vector */ - jmp int_hand - -vec10: - /* error code */ - pushl $10 /* vector */ - jmp int_hand - .word 0x9090 - -vec11: - /* error code */ - pushl $11 /* vector */ - jmp int_hand - .word 0x9090 - -vec12: - /* error code */ - pushl $12 /* vector */ - jmp int_hand - .word 0x9090 - -vec13: - /* error code */ - pushl $13 /* vector */ - jmp int_hand - .word 0x9090 - -vec14: - /* error code */ - pushl $14 /* vector */ - jmp int_hand - .word 0x9090 - -vec15: - pushl $0 /* error code */ - pushl $15 /* vector */ - jmp int_hand - -vec16: - pushl $0 /* error code */ - pushl $16 /* vector */ - jmp int_hand - -vec17: - /* error code */ - pushl $17 /* vector */ - jmp int_hand - .word 0x9090 - -vec18: - pushl $0 /* error code */ - pushl $18 /* vector */ - jmp int_hand - -vec19: - pushl $0 /* error code */ - pushl $19 /* vector */ - jmp int_hand - -int_hand: - /* At this point on the stack there is: - * 0(%esp) vector - * 4(%esp) error code - * 8(%esp) eip - * 12(%esp) cs - * 16(%esp) eflags - */ - pushl %edi - pushl %esi - pushl %ebp - /* Original stack pointer */ - leal 32(%esp), %ebp - pushl %ebp - pushl %ebx - pushl %edx - pushl %ecx - pushl %eax - - pushl %esp /* Pointer to structure on the stack */ - call x86_exception - pop %eax /* Drop the pointer */ - - popl %eax - popl %ecx - popl %edx - popl %ebx - popl %ebp /* Ignore saved %esp value */ - popl %ebp - popl %esi - popl %edi - - addl $8, %esp /* pop of the vector and error code */ - - iret - -#if CONFIG_GDB_STUB == 1 - - .globl gdb_stub_breakpoint -gdb_stub_breakpoint: - popl %eax /* Return address */ - pushfl - pushl %cs - pushl %eax /* Return address */ - pushl $0 /* No error code */ - pushl $32 /* vector 32 is user defined */ - jmp int_hand - -#endif - - .globl gdt, gdt_end, gdt_limit, idtarg - -gdt_limit = gdt_end - gdt - 1 /* compute the table limit */ -gdtaddr: - .word gdt_limit - .long gdt /* we know the offset */ - - .data - - /* This is the gdt for GCC part of coreboot. - * It is different from the gdt in ROMCC/ASM part of coreboot - * which is defined in entry32.inc - * - * When the machine is initially started, we use a very simple - * gdt from rom (that in entry32.inc) which only contains those - * entries we need for protected mode. - * - * When we're executing code from RAM, we want to do more complex - * stuff, like initializing PCI option roms in real mode, or doing - * a resume from a suspend to ram. - */ -gdt: - /* selgdt 0, unused */ - .word 0x0000, 0x0000 /* dummy */ - .byte 0x00, 0x00, 0x00, 0x00 - - /* selgdt 8, unused */ - .word 0x0000, 0x0000 /* dummy */ - .byte 0x00, 0x00, 0x00, 0x00 - - /* selgdt 0x10, flat code segment */ - .word 0xffff, 0x0000 - .byte 0x00, 0x9b, 0xcf, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */ - - /* selgdt 0x18, flat data segment */ - .word 0xffff, 0x0000 - .byte 0x00, 0x93, 0xcf, 0x00 - - /* selgdt 0x20, unused */ - .word 0x0000, 0x0000 /* dummy */ - .byte 0x00, 0x00, 0x00, 0x00 - - /* The next two entries are used for executing VGA option ROMs */ - - /* selgdt 0x28 16 bit 64k code at 0x00000000 */ - .word 0xffff, 0x0000 - .byte 0, 0x9a, 0, 0 - - /* selgdt 0x30 16 bit 64k data at 0x00000000 */ - .word 0xffff, 0x0000 - .byte 0, 0x92, 0, 0 - - /* The next two entries are used for ACPI S3 RESUME */ - - /* selgdt 0x38, flat data segment 16 bit */ - .word 0x0000, 0x0000 /* dummy */ - .byte 0x00, 0x93, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */ - - /* selgdt 0x40, flat code segment 16 bit */ - .word 0xffff, 0x0000 - .byte 0x00, 0x9b, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */ -gdt_end: - -idtarg: - .word _idt_end - _idt - 1 /* limit */ - .long _idt - .word 0 -_idt: - .fill 20, 8, 0 # idt is uninitialized -_idt_end: - - .previous -.code32 |