reformating, we are going to use it for
vsa on geode GX. There was some bug in setting up stack, what was that? git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2208 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Li-Ta Lo
parent
410075e0f1
commit
a5ce2341ec
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@ -77,56 +77,56 @@
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Core part of the bios no longer sets up any 16 bit segments */
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__asm__ (
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/* pointer to original gdt */
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"gdtarg: \n\t"
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".word gdt_limit \n\t"
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".long gdt \n\t"
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"gdtarg: \n"
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" .word gdt_limit \n"
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" .long gdt \n"
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/* compute the table limit */
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"__mygdt_limit = __mygdt_end - __mygdt - 1 \n\t"
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"__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
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"__mygdtaddr: \n\t"
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".word __mygdt_limit \n\t"
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".long __mygdt \n\t"
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"__mygdtaddr: \n"
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" .word __mygdt_limit \n"
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" .long __mygdt \n"
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"__mygdt: \n\t"
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"__mygdt: \n"
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/* selgdt 0, unused */
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".word 0x0000, 0x0000 \n\t"
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".byte 0x00, 0x00, 0x00, 0x00 \n\t"
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" .word 0x0000, 0x0000 \n"
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" .byte 0x00, 0x00, 0x00, 0x00 \n"
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/* selgdt 8, unused */
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".word 0x0000, 0x0000 \n\t"
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".byte 0x00, 0x00, 0x00, 0x00 \n\t"
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" .word 0x0000, 0x0000 \n"
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" .byte 0x00, 0x00, 0x00, 0x00 \n"
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/* selgdt 0x10, flat code segment */
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".word 0xffff, 0x0000 \n\t"
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".byte 0x00, 0x9b, 0xcf, 0x00 \n\t"
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" .word 0xffff, 0x0000 \n"
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" .byte 0x00, 0x9b, 0xcf, 0x00 \n"
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/* selgdt 0x18, flat data segment */
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".word 0xffff, 0x0000 \n\t"
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".byte 0x00, 0x93, 0xcf, 0x00 \n\t"
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" .word 0xffff, 0x0000 \n"
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" .byte 0x00, 0x93, 0xcf, 0x00 \n"
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/* selgdt 0x20, unused */
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".word 0x0000, 0x0000 \n\t"
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".byte 0x00, 0x00, 0x00, 0x00 \n\t"
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" .word 0x0000, 0x0000 \n"
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" .byte 0x00, 0x00, 0x00, 0x00 \n"
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/*selgdt 0x28 16-bit 64k code at 0x00000000 */
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".word 0xffff, 0x0000 \n\t"
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".byte 0, 0x9a, 0, 0 \n\t"
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/* selgdt 0x28 16-bit 64k code at 0x00000000 */
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" .word 0xffff, 0x0000 \n"
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" .byte 0, 0x9a, 0, 0 \n"
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/* selgdt 0x30 16-bit 64k data at 0x00000000 */
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".word 0xffff, 0x0000 \n\t"
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".byte 0, 0x92, 0, 0 \n\t"
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" .word 0xffff, 0x0000 \n"
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" .byte 0, 0x92, 0, 0 \n"
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"__mygdt_end: \n\t"
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"__mygdt_end: \n"
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);
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/* Declare a pointer to where our idt is going to be i.e. at mem zero */
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__asm__ (
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"__myidt: \n"
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" .word 1023 \n"
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" .long 0 \n"
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" .word 0 \n"
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__asm__ ("__myidt: \n"
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/* 16-bit limit */
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" .word 1023 \n"
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/* 24-bit base */
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" .long 0 \n"
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" .word 0 \n"
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);
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/* The address arguments to this function are PHYSICAL ADDRESSES */
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@ -135,92 +135,93 @@ static void real_mode_switch_call_vga(unsigned long devfn)
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__asm__ __volatile__ (
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// paranoia -- does ecx get saved? not sure. This is
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// the easiest safe thing to do.
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" pushal\n"
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" pushal \n"
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/* save the stack */
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" mov %esp, __stack\n"
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" jmp 1f\n"
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"__stack: .long 0\n"
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" mov %esp, __stack \n"
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" jmp 1f \n"
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"__stack: .long 0 \n"
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"1:\n"
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/* get devfn into %ecx */
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" movl %esp, %ebp\n"
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" movl 8(%ebp), %ecx\n"
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" movl %esp, %ebp \n"
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" movl 8(%ebp), %ecx \n"
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/* load 'our' gdt */
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" lgdt %cs:__mygdtaddr \n\t"
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" lgdt %cs:__mygdtaddr \n"
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/* This configures CS properly for real mode. */
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" ljmp $0x28, $__rms_16bit\n"
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"__rms_16bit: \n"
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".code16 \n"
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" ljmp $0x28, $__rms_16bit\n"
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"__rms_16bit: \n"
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" .code16 \n"
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/* 16 bit code from here on... */
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/* Load the segment registers w/ properly configured segment
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* descriptors. They will retain these configurations (limits,
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* writability, etc.) once protected mode is turned off. */
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" mov $0x30, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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" mov $0x30, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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/* Turn off protection (bit 0 in CR0) */
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" movl %cr0, %eax \n"
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" andl $0xFFFFFFFE, %eax \n"
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" movl %eax, %cr0 \n"
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" movl %cr0, %eax \n"
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" andl $0xFFFFFFFE, %eax \n"
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" movl %eax, %cr0 \n"
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/* Now really going into real mode */
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" ljmp $0, $__rms_real \n"
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"__rms_real: \n"
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" ljmp $0, $__rms_real\n"
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"__rms_real: \n"
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// put the stack at the end of page zero.
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// that way we can easily share it between real and protected,
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// since the 16-bit ESP at segment 0 will work for any case.
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/* put the stack at the end of page zero.
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* that way we can easily share it between real and protected,
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* since the 16-bit ESP at segment 0 will work for any case.
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/* Setup a stack */
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" mov $0x0, %ax \n"
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" mov %ax, %ss \n"
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" movl $0x1000, %eax \n"
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" movl %eax, %esp \n"
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" mov $0x0, %ax \n"
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" mov %ax, %ss \n"
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" movl $0x1000, %eax \n"
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" movl %eax, %esp \n"
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/* Load our 16 it idt */
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" xor %ax, %ax \n"
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" mov %ax, %ds \n"
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" lidt __myidt \n"
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" xor %ax, %ax \n"
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" mov %ax, %ds \n"
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" lidt __myidt \n"
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/* Dump zeros in the other segregs */
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov $0x40, %ax \n"
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" mov %ax, %ds \n"
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" mov %cx, %ax \n"
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/* go run the code */
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" .byte 0x9a, 0x03, 0, 0, 0xc0 \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov $0x40, %ax \n"
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" mov %ax, %ds \n"
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" mov %cx, %ax \n"
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/* run VGA BIOS at 0xc000:0003 */
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" lcall $0xc000, $0x0003\n"
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/* if we got here, just about done.
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* Need to get back to protected mode */
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"movl %cr0, %eax\n"
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"orl $0x0000001, %eax\n" /* PE = 1 */
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"movl %eax, %cr0\n"
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" movl %cr0, %eax \n"
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" orl $0x0000001, %eax\n" /* PE = 1 */
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" movl %eax, %cr0 \n"
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/* Now that we are in protected mode jump to a 32 bit code segment. */
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"data32 ljmp $0x10, $vgarestart\n"
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" data32 ljmp $0x10, $vgarestart\n"
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"vgarestart:\n"
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".code32\n"
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" movw $0x18, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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" .code32\n"
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" movw $0x18, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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/* restore proper gdt and idt */
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" lgdt %cs:gdtarg \n"
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" lidt idtarg \n"
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".globl vga_exit\n"
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"vga_exit:\n"
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" mov __stack, %esp\n"
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" popal\n"
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" lgdt %cs:gdtarg \n"
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" lidt idtarg \n"
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".globl vga_exit \n"
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"vga_exit: \n"
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" mov __stack, %esp \n"
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" popal \n"
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);
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}
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@ -228,109 +229,109 @@ __asm__ (".text\n""real_mode_switch_end:\n");
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extern char real_mode_switch_end[];
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/* call vga bios int 10 function 0x4f14 to enable main console
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epia-m does not always autosence the main console so forcing it on is good !! */
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epia-m does not always autosence the main console so forcing it on is good !! */
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void vga_enable_console()
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{
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__asm__ __volatile__ (
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// paranoia -- does ecx get saved? not sure. This is
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// the easiest safe thing to do.
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" pushal\n"
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/* paranoia -- does ecx get saved? not sure. This is
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* the easiest safe thing to do. */
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" pushal \n"
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/* save the stack */
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" mov %esp, __stack\n"
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" mov %esp, __stack \n"
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/* load 'our' gdt */
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" lgdt %cs:__mygdtaddr \n\t"
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" lgdt %cs:__mygdtaddr \n"
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/* This configures CS properly for real mode. */
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" ljmp $0x28, $__vga_ec_16bit\n"
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"__vga_ec_16bit: \n"
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".code16 \n"
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" ljmp $0x28, $__vga_ec_16bit\n"
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"__vga_ec_16bit: \n"
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" .code16 \n"
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/* 16 bit code from here on... */
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/* Load the segment registers w/ properly configured segment
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* descriptors. They will retain these configurations (limits,
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* writability, etc.) once protected mode is turned off. */
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" mov $0x30, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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" mov $0x30, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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/* Turn off protection (bit 0 in CR0) */
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" movl %cr0, %eax \n"
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" andl $0xFFFFFFFE, %eax \n"
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" movl %eax, %cr0 \n"
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" movl %cr0, %eax \n"
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" andl $0xFFFFFFFE, %eax\n"
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" movl %eax, %cr0 \n"
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/* Now really going into real mode */
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" ljmp $0, $__vga_ec_real \n"
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" ljmp $0, $__vga_ec_real \n"
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"__vga_ec_real: \n"
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// put the stack at the end of page zero.
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// that way we can easily share it between real and protected,
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// since the 16-bit ESP at segment 0 will work for any case.
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/* put the stack at the end of page zero.
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* that way we can easily share it between real and protected,
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* since the 16-bit ESP at segment 0 will work for any case.
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/* Setup a stack */
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" mov $0x0, %ax \n"
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" mov %ax, %ss \n"
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" movl $0x1000, %eax \n"
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" movl %eax, %esp \n"
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" mov $0x0, %ax \n"
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" mov %ax, %ss \n"
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" movl $0x1000, %eax \n"
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" movl %eax, %esp \n"
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/* debugging for RGM */
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" mov $0x11, %al \n"
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" outb %al, $0x80\n"
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" mov $0x11, %al \n"
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" outb %al, $0x80 \n"
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/* Load our 16 it idt */
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" xor %ax, %ax \n"
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" mov %ax, %ds \n"
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" lidt __myidt \n"
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" xor %ax, %ax \n"
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" mov %ax, %ds \n"
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" lidt __myidt \n"
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/* Dump zeros in the other segregs */
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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/* ask bios to enable main console */
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/* set up for int 10 call - values found from X server bios call routines */
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" movw $0x4f14,%ax \n"
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" movw $0x8003,%bx \n"
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" movw $1, %cx \n"
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" movw $0, %dx \n"
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" movw $0, %di \n"
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" .byte 0xcd, 0x10 \n"
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" movb $0x55, %al\noutb %al, $0x80\n"
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/* set up for int 10 call - values found from X server
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* bios call routines */
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" movw $0x4f14,%ax \n"
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" movw $0x8003,%bx \n"
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" movw $1, %cx \n"
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" movw $0, %dx \n"
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" movw $0, %di \n"
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" int $0x10 \n"
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" movb $0x55, %al \n"
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" outb %al, $0x80 \n"
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/* if we got here, just about done.
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* Need to get back to protected mode */
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"movl %cr0, %eax\n"
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"orl $0x0000001, %eax\n" /* PE = 1 */
|
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"movl %eax, %cr0\n"
|
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" movl %cr0, %eax \n"
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" orl $0x0000001, %eax\n" /* PE = 1 */
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||||
" movl %eax, %cr0 \n"
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/* Now that we are in protected mode jump to a 32 bit code segment. */
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"data32 ljmp $0x10, $vga_ec_restart\n"
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" data32 ljmp $0x10, $vga_ec_restart\n"
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"vga_ec_restart:\n"
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".code32\n"
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" movw $0x18, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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" .code32\n"
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" movw $0x18, %ax \n"
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" mov %ax, %ds \n"
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" mov %ax, %es \n"
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" mov %ax, %fs \n"
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" mov %ax, %gs \n"
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" mov %ax, %ss \n"
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/* restore proper gdt and idt */
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" lgdt %cs:gdtarg \n"
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" lidt idtarg \n"
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".globl vga__ec_exit\n"
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" lgdt %cs:gdtarg \n"
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" lidt idtarg \n"
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" .globl vga__ec_exit \n"
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"vga_ec_exit:\n"
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" mov __stack, %esp\n"
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" popal\n"
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" mov __stack, %esp \n"
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" popal\n"
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);
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}
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void
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do_vgabios(void)
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void do_vgabios(void)
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{
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device_t dev;
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unsigned long busdevfn;
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|
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@ -340,19 +341,20 @@ do_vgabios(void)
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int i;
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/* clear vga bios data area */
|
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for (i=0x400; i<0x500; i++) {
|
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for (i = 0x400; i < 0x500; i++) {
|
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*(unsigned char *) i = 0;
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}
|
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|
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dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0);
|
||||
|
||||
if (! dev) {
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if (!dev) {
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||||
printk_debug("NO VGA FOUND\n");
|
||||
return;
|
||||
}
|
||||
printk_debug("found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
|
||||
|
||||
/* declare rom address here - keep any config data out of the way of core LXB stuff */
|
||||
|
||||
/* declare rom address here - keep any config data out of the way
|
||||
* of core LXB stuff */
|
||||
|
||||
rom = 0xfffc0000;
|
||||
pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1);
|
||||
|
|
@ -373,12 +375,10 @@ do_vgabios(void)
|
|||
real_mode_switch_call_vga(busdevfn);
|
||||
} else
|
||||
printk_debug("Failed to copy VGA BIOS to 0xc0000\n");
|
||||
|
||||
} else
|
||||
printk_debug("BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
|
||||
|
||||
pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
|
||||
|
||||
pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -405,33 +405,33 @@ struct realidt {
|
|||
// more complex code in linuxbios itself. This helps a lot as we don't
|
||||
// have to do address fixup in this little stub, and calls are absolute
|
||||
// so the handler is relocatable.
|
||||
void handler(void) {
|
||||
void handler(void)
|
||||
{
|
||||
__asm__ __volatile__ (
|
||||
".code16\n"
|
||||
"idthandle:\n"
|
||||
" pushal\n"
|
||||
" movb $0, %al\n"
|
||||
" ljmp $0, $callbiosint16\n"
|
||||
"end_idthandle:\n"
|
||||
".code32\n"
|
||||
" .code16 \n"
|
||||
"idthandle: \n"
|
||||
" pushal \n"
|
||||
" movb $0, %al \n"
|
||||
" ljmp $0, $callbiosint16\n"
|
||||
"end_idthandle: \n"
|
||||
" .code32 \n"
|
||||
);
|
||||
|
||||
}
|
||||
|
||||
void debughandler(void) {
|
||||
void debughandler(void)
|
||||
{
|
||||
__asm__ __volatile__ (
|
||||
".code16\n"
|
||||
"debughandle:\n"
|
||||
" pushw %cx \n"
|
||||
" movw $250, %cx \n"
|
||||
"dbh1: \n"
|
||||
" loop dbh1 \n"
|
||||
" popw %cx \n"
|
||||
" iret \n"
|
||||
"end_debughandle:\n"
|
||||
".code32\n"
|
||||
" .code16 \n"
|
||||
"debughandle: \n"
|
||||
" pushw %cx \n"
|
||||
" movw $250, %cx \n"
|
||||
"dbh1: \n"
|
||||
" loop dbh1 \n"
|
||||
" popw %cx \n"
|
||||
" iret \n"
|
||||
"end_debughandle: \n"
|
||||
".code32 \n"
|
||||
);
|
||||
|
||||
}
|
||||
|
||||
// Calling conventions. The first C function is called with this stuff
|
||||
|
|
@ -440,136 +440,118 @@ void debughandler(void) {
|
|||
// the C function will call the biosint function with these as
|
||||
// REFERENCE parameters. In this way, we can easily get
|
||||
// returns back to the INTx caller (i.e. vgabios)
|
||||
void callbiosint(void) {
|
||||
void callbiosint(void)
|
||||
{
|
||||
__asm__ __volatile__ (
|
||||
".code16\n"
|
||||
"callbiosint16:\n"
|
||||
" push %ds \n"
|
||||
" push %es \n"
|
||||
" push %fs \n"
|
||||
" push %gs \n"
|
||||
" .code16 \n"
|
||||
"callbiosint16: \n"
|
||||
" push %ds \n"
|
||||
" push %es \n"
|
||||
" push %fs \n"
|
||||
" push %gs \n"
|
||||
// clean up the int #. To save space we put it in the lower
|
||||
// byte. But the top 24 bits are junk.
|
||||
"andl $0xff, %eax\n"
|
||||
" andl $0xff, %eax\n"
|
||||
// this push does two things:
|
||||
// - put the INT # on the stack as a parameter
|
||||
// - provides us with a temp for the %cr0 mods.
|
||||
"pushl %eax\n"
|
||||
"movl %cr0, %eax\n"
|
||||
//"andl $0x7FFAFFD1, %eax\n" /* PG,AM,WP,NE,TS,EM,MP = 0 */
|
||||
//"orl $0x60000001, %eax\n" /* CD, NW, PE = 1 */
|
||||
"orl $0x00000001, %eax\n" /* PE = 1 */
|
||||
"movl %eax, %cr0\n"
|
||||
" pushl %eax \n"
|
||||
" movl %cr0, %eax\n"
|
||||
" orl $0x00000001, %eax\n" /* PE = 1 */
|
||||
" movl %eax, %cr0\n"
|
||||
/* Now that we are in protected mode jump to a 32 bit code segment. */
|
||||
"data32 ljmp $0x10, $biosprotect\n"
|
||||
"biosprotect:\n"
|
||||
".code32\n"
|
||||
" movw $0x18, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
" mov %ax, %es \n"
|
||||
" mov %ax, %fs \n"
|
||||
" mov %ax, %gs \n"
|
||||
" mov %ax, %ss \n"
|
||||
" lidt idtarg \n"
|
||||
" data32 ljmp $0x10, $biosprotect\n"
|
||||
"biosprotect: \n"
|
||||
" .code32 \n"
|
||||
" movw $0x18, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
" mov %ax, %es \n"
|
||||
" mov %ax, %fs \n"
|
||||
" mov %ax, %gs \n"
|
||||
" mov %ax, %ss \n"
|
||||
" lidt idtarg \n"
|
||||
" call biosint \n"
|
||||
// back to real mode ...
|
||||
" ljmp $0x28, $__rms_16bit2\n"
|
||||
"__rms_16bit2: \n"
|
||||
".code16 \n" /* 16 bit code from here on... */
|
||||
|
||||
" ljmp $0x28, $__rms_16bit2\n"
|
||||
"__rms_16bit2: \n"
|
||||
" .code16 \n"
|
||||
/* 16 bit code from here on... */
|
||||
/* Load the segment registers w/ properly configured segment
|
||||
* descriptors. They will retain these configurations (limits,
|
||||
* writability, etc.) once protected mode is turned off. */
|
||||
" mov $0x30, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
" mov %ax, %es \n"
|
||||
" mov %ax, %fs \n"
|
||||
" mov %ax, %gs \n"
|
||||
" mov %ax, %ss \n"
|
||||
" mov $0x30, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
" mov %ax, %es \n"
|
||||
" mov %ax, %fs \n"
|
||||
" mov %ax, %gs \n"
|
||||
" mov %ax, %ss \n"
|
||||
|
||||
/* Turn off protection (bit 0 in CR0) */
|
||||
" movl %cr0, %eax \n"
|
||||
" andl $0xFFFFFFFE, %eax \n"
|
||||
" movl %eax, %cr0 \n"
|
||||
|
||||
" movl %cr0, %eax \n"
|
||||
" andl $0xFFFFFFFE, %eax \n"
|
||||
" movl %eax, %cr0 \n"
|
||||
|
||||
/* Now really going into real mode */
|
||||
" ljmp $0, $__rms_real2 \n"
|
||||
"__rms_real2: \n"
|
||||
|
||||
/* Setup a stack */
|
||||
" mov $0x0, %ax \n"
|
||||
" mov %ax, %ss \n"
|
||||
" ljmp $0, $__rms_real2 \n"
|
||||
"__rms_real2: \n"
|
||||
|
||||
/* Setup a stack
|
||||
* FixME: where is esp? */
|
||||
" mov $0x0, %ax \n"
|
||||
" mov %ax, %ss \n"
|
||||
|
||||
/* ebugging for RGM */
|
||||
" mov $0x11, %al \n"
|
||||
" outb %al, $0x80\n"
|
||||
" xor %ax, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
" lidt __myidt \n"
|
||||
" mov %ax, %es \n"
|
||||
" mov %ax, %fs \n"
|
||||
" mov %ax, %gs \n"
|
||||
" mov $0x40, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
// pop the INT # that you pushed earlier
|
||||
" popl %eax\n"
|
||||
" pop %gs \n"
|
||||
" pop %fs \n"
|
||||
" pop %es \n"
|
||||
" pop %ds \n"
|
||||
" popal\n"
|
||||
" iret\n"
|
||||
".code32\n"
|
||||
" mov $0x11, %al \n"
|
||||
" outb %al, $0x80 \n"
|
||||
|
||||
/* Load our 16 it idt */
|
||||
" xor %ax, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
" lidt __myidt \n"
|
||||
|
||||
/* Dump zeros in the other segregs */
|
||||
" mov %ax, %es \n"
|
||||
" mov %ax, %fs \n"
|
||||
" mov %ax, %gs \n"
|
||||
" mov $0x40, %ax \n"
|
||||
" mov %ax, %ds \n"
|
||||
|
||||
/* pop the INT # that you pushed earlier */
|
||||
" popl %eax \n"
|
||||
" pop %gs \n"
|
||||
" pop %fs \n"
|
||||
" pop %es \n"
|
||||
" pop %ds \n"
|
||||
" popal \n"
|
||||
" iret \n"
|
||||
" .code32 \n"
|
||||
);
|
||||
}
|
||||
|
||||
|
||||
enum {
|
||||
PCIBIOS = 0x1a,
|
||||
MEMSIZE = 0x12
|
||||
};
|
||||
int
|
||||
pcibios(
|
||||
unsigned long *pedi,
|
||||
unsigned long *pesi,
|
||||
unsigned long *pebp,
|
||||
unsigned long *pesp,
|
||||
unsigned long *pebx,
|
||||
unsigned long *pedx,
|
||||
unsigned long *pecx,
|
||||
unsigned long *peax,
|
||||
unsigned long *pflags
|
||||
);
|
||||
int
|
||||
handleint21(
|
||||
unsigned long *pedi,
|
||||
unsigned long *pesi,
|
||||
unsigned long *pebp,
|
||||
unsigned long *pesp,
|
||||
unsigned long *pebx,
|
||||
unsigned long *pedx,
|
||||
unsigned long *pecx,
|
||||
unsigned long *peax,
|
||||
unsigned long *pflags
|
||||
|
||||
int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
|
||||
unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
|
||||
unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
|
||||
|
||||
int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
|
||||
unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
|
||||
unsigned long *pecx, unsigned long *peax, unsigned long *pflags
|
||||
);
|
||||
|
||||
extern void vga_exit(void);
|
||||
|
||||
int
|
||||
biosint(
|
||||
unsigned long intnumber,
|
||||
unsigned long gsfs,
|
||||
unsigned long dses,
|
||||
unsigned long edi,
|
||||
unsigned long esi,
|
||||
unsigned long ebp,
|
||||
unsigned long esp,
|
||||
unsigned long ebx,
|
||||
unsigned long edx,
|
||||
unsigned long ecx,
|
||||
unsigned long eax,
|
||||
unsigned long cs_ip,
|
||||
unsigned short stackflags
|
||||
) {
|
||||
int biosint(unsigned long intnumber,
|
||||
unsigned long gsfs, unsigned long dses,
|
||||
unsigned long edi, unsigned long esi,
|
||||
unsigned long ebp, unsigned long esp,
|
||||
unsigned long ebx, unsigned long edx,
|
||||
unsigned long ecx, unsigned long eax,
|
||||
unsigned long cs_ip, unsigned short stackflags)
|
||||
{
|
||||
unsigned long ip;
|
||||
unsigned long cs;
|
||||
unsigned long flags;
|
||||
|
|
@ -579,10 +561,14 @@ biosint(
|
|||
cs = cs_ip >> 16;
|
||||
flags = stackflags;
|
||||
|
||||
printk_debug("biosint: # 0x%lx, eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
|
||||
intnumber, eax, ebx, ecx, edx);
|
||||
printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", ebp, esp, edi, esi);
|
||||
printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n", ip, cs, flags);
|
||||
printk_debug("biosint: INT# 0x%lx\n", intnumber);
|
||||
printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
|
||||
eax, ebx, ecx, edx);
|
||||
printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
|
||||
ebp, esp, edi, esi);
|
||||
printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n",
|
||||
ip, cs, flags);
|
||||
|
||||
// cases in a good compiler are just as good as your own tables.
|
||||
switch (intnumber) {
|
||||
case 0 ... 15:
|
||||
|
|
@ -667,8 +653,8 @@ void setup_realmode_idt(void)
|
|||
intbyte = codeptr + 3;
|
||||
*intbyte = 0x42; /* int42 is the relocated int10 */
|
||||
|
||||
/* debug handler - useful to set a programmable delay between instructions if the TF bit is set upon
|
||||
call to real mode */
|
||||
/* debug handler - useful to set a programmable delay between instructions if the
|
||||
TF bit is set upon call to real mode */
|
||||
idts[1].cs = 0;
|
||||
idts[1].offset = 16384;
|
||||
memcpy(16384, &debughandle, &end_debughandle - &debughandle);
|
||||
|
|
@ -697,17 +683,10 @@ enum {
|
|||
};
|
||||
|
||||
int
|
||||
pcibios(
|
||||
unsigned long *pedi,
|
||||
unsigned long *pesi,
|
||||
unsigned long *pebp,
|
||||
unsigned long *pesp,
|
||||
unsigned long *pebx,
|
||||
unsigned long *pedx,
|
||||
unsigned long *pecx,
|
||||
unsigned long *peax,
|
||||
unsigned long *pflags
|
||||
) {
|
||||
pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
|
||||
unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
|
||||
unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
|
||||
{
|
||||
unsigned long edi = *pedi;
|
||||
unsigned long esi = *pesi;
|
||||
unsigned long ebp = *pebp;
|
||||
|
|
@ -808,7 +787,8 @@ pcibios(
|
|||
|
||||
if (retval)
|
||||
retval = PCIBIOS_BADREG;
|
||||
printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", func, bus, devfn, reg, *pecx);
|
||||
printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
|
||||
func, bus, devfn, reg, *pecx);
|
||||
*peax = 0;
|
||||
retval = 0;
|
||||
}
|
||||
|
|
@ -821,13 +801,11 @@ pcibios(
|
|||
return retval;
|
||||
}
|
||||
|
||||
|
||||
|
||||
int handleint21( unsigned long *edi, unsigned long *esi, unsigned long *ebp,
|
||||
unsigned long *esp, unsigned long *ebx, unsigned long *edx,
|
||||
unsigned long *ecx, unsigned long *eax, unsigned long *flags)
|
||||
int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
|
||||
unsigned long *esp, unsigned long *ebx, unsigned long *edx,
|
||||
unsigned long *ecx, unsigned long *eax, unsigned long *flags)
|
||||
{
|
||||
int res=-1;
|
||||
int res=-1;
|
||||
switch(*eax&0xffff)
|
||||
{
|
||||
case 0x5f19:
|
||||
|
|
|
|||
Loading…
Reference in New Issue