📄 nruntime.asm
字号:
page ,132
title RUNTIME HOOKS (NO PORTING NEEDED IN GENERAL)
;---------------------------------------------------------------;
; NOTE: Do not destroy EBP,SS,DS,ES,FS,GS unless otherwise specified.
;---------------------------------------------------------------;
;*****************************************************************;
;*****************************************************************;
;** **;
;** (C)Copyright 1985-1996, American Megatrends Inc. **;
;** **;
;** All Rights Reserved. **;
;** **;
;** 6145-F, Northbelt Parkway, Norcross, **;
;** **;
;** Georgia - 30071, USA. Phone-(770)-246-8600. **;
;** **;
;*****************************************************************;
;*****************************************************************;
;---------------------------------------;
extrn ide_prim_base_addr:word
extrn ide_sec_base_addr:word
extrn ide_prim_irq :byte
extrn ide_sec_irq :byte
extrn misc_info :byte
;---------------------------------------;
extrn check_cmos_data:near
extrn proc_shutdown:near
extrn cmos_data_in_x:near
extrn cmos_data_out_x:near
extrn cmos_data_in:near
extrn cmos_data_out:near
extrn enable_l1_cache_wt:near
extrn enable_l1_cache_wb:near
extrn disable_l1_cache:near
extrn enable_l2_cache_wt:near
extrn enable_l2_cache_wb:near
extrn disable_l2_cache:near
extrn low_speed:near
extrn high_speed:near
;---------------------------------------;
include mbiosmac.mac
include mbiosequ.equ
include cf.equ
include silent.equ
include makeflag.equ
include setupequ.ext
;---------------------------------------;
cgroup group _text
_text segment word public 'CODE'
assume cs:cgroup
.486p
;---------------------------------------;
public _NRUNTIMEX_STARTS
_NRUNTIMEX_STARTS label byte ; marks start of module
;-----------------------------------------------------------------------;
; SET_SCRATCH_SEGMENT_SETUP ;
;-----------------------------------------------------------------------;
; this routine is called from hot key setup. this routine returns the ;
; segment value (of length at least 32k) which can be used as scratch ;
; ram during setup. ;
; input : ;
; ds 0040h ;
; stack available ;
; output: ;
; nc scratch segment found ;
; ax scratch segment ;
; cy scratch segment not found ;
; register usage..do not destroy any register except AX ;
; ;
; SUGGESTED USE: ;
; * this routine is supposed to look for any ram which can be used as ;
; scratch ram. use of shadow ram is suggested. if shadow is currently ;
; enabled then first disable the shadow and then make that segment R/W ;
; and return the value of segment. the segment will be restored in ;
; RESTORE_SCRATCH_SEGMENT_SETUP routine. ;
;-----------------------------------------------------------------------;
public set_scratch_segment_setup
set_scratch_segment_setup proc near
stc
ret
set_scratch_segment_setup endp
;-----------------------------------------------------------------------;
; RESTORE_SCRATCH_SEGMENT_SETUP ;
;-----------------------------------------------------------------------;
; this routine is called from hot key setup. this routine restores the ;
; segment value which is used as scratch ram during setup. ;
; input : ;
; ax scratch segment to be restored ;
; stack available ;
; output: ;
; nc scratch segment restored ;
; cy scratch segment not restored ;
; register usage..do not destroy any register except AX ;
; ;
; SUGGESTED USE: ;
; * this routine is supposed to restore the contents of segment which ;
; was returned as scratch ram by SET_SCRATCH_SEGMENT_SETUP. if shadow ;
; was originally enabled then enable the shadow properly before return.;
; make sure the shadow ram is write-protected before return. ;
;-----------------------------------------------------------------------;
public restore_scratch_segment_setup
restore_scratch_segment_setup proc near
stc
ret
restore_scratch_segment_setup endp
;-----------------------------------------------------------------------;
; FORCE_NO_OF_SECTORS ;
;-----------------------------------------------------------------------;
; check point : 91 ;
; this routine is called from hard_disk_setup during POST. this routine ;
; will force the number of sectors which can be xferred at a time to a ;
; working value. this routines is needed because some hard disk does not;
; work with the value it returned from identify drive command. ;
; input : ;
; AL #of sectors that can be xferred at a time as obtained ;
; from identify drive command ;
; SS 0030H ;
; DS 0040H ;
; ES 0000H ;
; stack available ;
; output: ;
; AL #of sectors that can be xferred at a time ;
; register usage : can not destroy any register except AL ;
;-----------------------------------------------------------------------;
public force_no_of_sectors
force_no_of_sectors proc near
; if it is > 8, force it to 8..
;; cmp al,08h
;; jbe setm_04
;; mov al,08h
;;setm_04:
ret
force_no_of_sectors endp
;-----------------------------------------------------------------------;
; PROGRAM_HD_STANDBY ;
;-----------------------------------------------------------------------;
; Check point : 91 ;
; this routine is called from hard_disk_setup during POST. this programs;
; hard disk standby timer value. ;
; input : ;
; AL timer value in unit of 5 sec ;
; SS 0030H ;
; DS 0040H ;
; ES 0000H ;
; stack available ;
; output: ;
; none ;
; register usage : can destroy any register except EBP, DS, ES ;
; NOTE : ;
; The ATA Spec defines the following power down commands that may be ;
; issued to the hard disk to set its power consumption mode: ;
; SET 1 SET 2 ;
; ----- ----- ;
; 98h e5h Check Power Mode - If drive is in, going to, or ;
; recovering from standby mode, Sector Count Reg. ;
; is returned with 00h. If drive is in idle mode,;
; return ffh in the Sector Count Reg. ;
; 97h e3h Idle - Place drive in idle mode. If Sector Count;
; Reg is nonzero, start automatic power down ;
; timer, if applicable. ;
; 95h e1h Idle Immediate - Drive immediately enters the ;
; idle power state. ;
; 96h e2h Standby - Place drive in standby mode. If Sec- ;
; tor Reg is nonzero, start automatic power down ;
; timer, if applicable. ;
; 94h e0h Standby Immediate - Drive immediately enters the;
; standby power state. ;
; 99h e6h Set Sleep Mode - Place drive in sleep mode. ;
;-----------------------------------------------------------------------;
public program_hd_standby
extrn set_standby_multiple:near
program_hd_standby proc near
mov ah,0e3h ; idle w/timer command (set 2)
pusha ; Don't know what set_standby_multiple
; destroys, so saving all regs.
call set_standby_multiple
popa ; Restore all regs.
jnc short hd_standby_programmend
mov ah,097h ; idle w/timer command (set 1)
call set_standby_multiple
hd_standby_programmend:
ret
program_hd_standby endp
;-----------------------------------------------------------------------;
; IDE_PRIM_IRQ_EXTRA ;
;-----------------------------------------------------------------------;
; This routine is called from hardware interrupt ISR for primary hard ;
; disk controller. This routine can implement anything extra to be done ;
; in IRQ ISR. For example, for PCI BIOS the routine may have to read the;
; hard disk status register to clear the interrupt. ;
; input : ;
; DS 0040H ;
; CS:IDE_PRIM_BASE_ADDR I/O base addr of primary controller ;
; output: ;
; none ;
; register usage : do not destory any register except AX ;
;-----------------------------------------------------------------------;
public ide_prim_irq_extra
ide_prim_irq_extra proc near
push dx
mov dx,cgroup:ide_prim_base_addr; get I/O base address
add dx,07h ; status register
in al,dx
pop dx
ret
ide_prim_irq_extra endp
;-----------------------------------------------------------------------;
; IDE_SEC_IRQ_EXTRA ;
;-----------------------------------------------------------------------;
; This routine is called from hardware interrupt ISR for secondary hard ;
; disk controller. This routine can implement anything extra to be done ;
; in IRQ ISR. For example, for PCI BIOS the routine may have to read the;
; hard disk status register to clear the interrupt. ;
; input : ;
; DS 0040H ;
; CS:IDE_SEC_BASE_ADDR I/O base addr of secondary controller ;
; output: ;
; none ;
; register usage : do not destory any register except AX ;
;-----------------------------------------------------------------------;
public ide_sec_irq_extra
ide_sec_irq_extra proc near
push dx
mov dx,cgroup:ide_sec_base_addr; get I/O base address
add dx,07h ; status register
in al,dx
pop dx
ret
ide_sec_irq_extra endp
;-----------------------------------------------------------------------;
; V_TIMER_TICK ;
; TIMER_TICK ;
;-----------------------------------------------------------------------;
; This routine is hardware INT-8 during diagnostics mode. CPU can be in ;
; real or virtual mode, (DS = 40) always. This routine will get control ;
; if diagnostics switch is on and you may do any LED blinking or other ;
; way of reporting that system is alive. ;
; input : ;
; DS 0040H ;
; register usage : save all registers and flag ;
; use IRET to return to caller (remember this is INT-8 ISR) ;
;-----------------------------------------------------------------------;
public v_timer_tick ; INT-8 in virtual mode, diag sw on
public timer_tick ; INT-8 in real mode, diag switch on
v_timer_tick:
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -