diff options
Diffstat (limited to 'sys/i386/bios/apm_setup.s')
| -rw-r--r-- | sys/i386/bios/apm_setup.s | 162 |
1 files changed, 3 insertions, 159 deletions
diff --git a/sys/i386/bios/apm_setup.s b/sys/i386/bios/apm_setup.s index 0f7fb5e..21993d9 100644 --- a/sys/i386/bios/apm_setup.s +++ b/sys/i386/bios/apm_setup.s @@ -11,13 +11,11 @@ * * Sep., 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD) * - * $Id: apm_setup.s,v 1.12 1997/11/04 18:12:45 nate Exp $ + * $Id: apm_setup.s,v 1.13 1998/06/03 01:59:34 msmith Exp $ + * + * This file now contains no setup code. */ -#include "apm.h" - -#if NAPM > 0 - #define ASSEMBLER #include "assym.s" /* system definitions */ #include <machine/asmacros.h> /* miscellaneous asm macros */ @@ -27,160 +25,7 @@ .file "apm_setup.s" - .data -_apm_init_image: - .globl _apm_init_image - -1: -#include "i386/apm/apm_init/apm_init.inc" -2: - -_apm_init_image_size: - .globl _apm_init_image_size - .long 2b - 1b - -_apm_version: - .globl _apm_version - .long 0 - -_apm_cs_entry: - .globl _apm_cs_entry - .long 0 - -_apm_cs16_base: - .globl _apm_cs16_base - .word 0 - -_apm_cs32_base: - .globl _apm_cs32_base - .word 0 - -_apm_ds_base: - .globl _apm_ds_base - .word 0 - -_apm_cs32_limit: - .globl _apm_cs32_limit - .word 0 - -_apm_cs16_limit: - .globl _apm_cs16_limit - .word 0 - -_apm_ds_limit: - .globl _apm_ds_limit - .word 0 - -_apm_flags: - .globl _apm_flags - .word 0 - .globl _apm_current_gdt_pdesc /* current GDT pseudo desc. */ -_apm_current_gdt_pdesc: - .word 0, 0, 0 - - .globl _bootstrap_gdt -_bootstrap_gdt: - .space SIZEOF_GDT*BOOTSTRAP_GDT_NUM - .text -_apm_setup: - .globl _apm_setup - - /* - * Setup APM BIOS: - * - * APM BIOS initialization should be done from real mode or V86 mode. - * - * (by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>) - */ - - /* - * Don't trust the value of %fs and %gs (some AT-compatible BIOS - * implementations leave junk values in these segment registers - * on bootstrap) - */ - xorl %eax, %eax /* null selector */ - movw %ax, %fs - movw %ax, %gs - - /* - * Copy APM initializer under 1MB boundary: - * - * APM initializer program must switch the CPU to real mode. - * But FreeBSD kernel runs above 1MB boundary. So we must - * copy the initializer code to conventional memory. - */ - movl PADDR(_apm_init_image_size), %ecx /* size */ - lea PADDR(_apm_init_image), %esi /* source */ - movl $ APM_OURADDR, %edi /* destination */ - cld - rep - movsb - - /* get GDT base */ - sgdt PADDR(_apm_current_gdt_pdesc) - - /* copy GDT to _bootstrap_gdt */ - xorl %ecx, %ecx - movw PADDR(_apm_current_gdt_pdesc), %cx - movl PADDR(_apm_current_gdt_pdesc + 2), %esi - lea PADDR(_bootstrap_gdt), %edi - cld - rep - movsb - - /* setup GDT pseudo descriptor */ - movw $(SIZEOF_GDT*BOOTSTRAP_GDT_NUM), %ax - movw %ax, PADDR(_apm_current_gdt_pdesc) - leal PADDR(_bootstrap_gdt), %eax - movl %eax, PADDR(_apm_current_gdt_pdesc + 2) - - /* load new GDTR */ - lgdt PADDR(_apm_current_gdt_pdesc) - - /* setup GDT for APM initializer */ - lea PADDR(_bootstrap_gdt), %ecx - movl $(APM_OURADDR), %eax /* use %ax for 15..0 */ - movl %eax, %ebx - shrl $16, %ebx /* use %bl for 23..16 */ - /* use %bh for 31..24 */ -#define APM_SETUP_GDT(index, attrib) \ - movl $(index), %si ; \ - lea 0(%ecx,%esi,8), %edx ; \ - movw $0xffff, (%edx) ; \ - movw %ax, 2(%edx) ; \ - movb %bl, 4(%edx) ; \ - movw $(attrib), 5(%edx) ; \ - movb %bh, 7(%edx) - - APM_SETUP_GDT(APM_INIT_CS_INDEX , CS32_ATTRIB) - APM_SETUP_GDT(APM_INIT_DS_INDEX , DS32_ATTRIB) - APM_SETUP_GDT(APM_INIT_CS16_INDEX, CS16_ATTRIB) - APM_SETUP_GDT(APM_INIT_DS16_INDEX, DS16_ATTRIB) - - /* - * Call the initializer: - * - * direct intersegment call to conventional memory code - */ - .byte 0x9a /* actually, lcall $APM_INIT_CS_SEL, $0 */ - .long 0 - .word APM_INIT_CS_SEL - - movl %eax, PADDR(_apm_version) - movl %ebx, PADDR(_apm_cs_entry) - movw %cx, PADDR(_apm_cs16_base) - shrl $16, %ecx - movw %cx, PADDR(_apm_cs32_base) - movw %dx, PADDR(_apm_ds_base) - movw %si, PADDR(_apm_cs32_limit) - shrl $16, %esi - movw %si, PADDR(_apm_ds_limit) - movw %di, PADDR(_apm_flags) - - ret - -.text .align 2 .globl _apm_bios_call _apm_bios_call: @@ -213,4 +58,3 @@ _apm_bios_call: popl %esi popl %ebp ret -#endif NAPM > 0 |
