📄 oempost.asm
字号:
popa
ret
;-----------------------------------------------------------------------;
; CHECK_DISPLAY_CPU_CLOCK ;
; This routine returns the information whether the CPU clock will be ;
; displayed. ;
; input : ;
; none ;
; output: ;
; NC display cpu clock ;
; CY do not display cpu clock ;
; register usage : do not destroy any register ;
; Note : ;
; 1. For AMD CPU, you may want not to display PRating along with ;
; the CPU name and may want to display PRating in place of CPU clock. ;
; In this case, this routine should return as CLC (i.e. display CPU ;
; clock) and DISPLAY_CPU_CLOCK routine should display PRating instead of;
; CPU clock frequency. ;
; 2. Default code returns CY i.e. not to display CPU clock frequency for;
; AMD CPU with PRating. For AMD CPU without PRating, default code will ;
; return NC i.e. to display CPU clock frrequency. ;
;-----------------------------------------------------------------------;
public check_display_cpu_clock
check_display_cpu_clock:
extrn _sysinfo_flag:word
test cgroup:byte ptr _sysinfo_flag,01h ; bit0=0, don't display clock
jz cdcc_no_clock
cmp cs:byte ptr [pr_string+2],00h; PRating exists ?
jnz cdcc_no_clock ; yes, do not display clock if PRating
clc ; NC, display clock
jmp short cdcc_exit
cdcc_no_clock:
stc ; CY, do not display CPU clock
cdcc_exit:
ret
;-----------------------------------------------------------------------;
; DISPLAY_CPU_CLOCK ;
; This routine displays the CPU clock. ;
; input : ;
; none ;
; output: ;
; none ;
; register usage : do not destroy any register ;
; Note : ;
; 1. For AMD CPU, you may want not to display PRating along with ;
; the CPU name and may want to display PRating in place of CPU clock. ;
; In this case, the CHECK_DISPLAY_CPU_CLOCK routine should return as CLC;
; (i.e. display CPU clock) and this routine should display PRating ;
; instead of CPU clock frequency. ;
; 2. Default code is to display CPU clock frequency. ;
;-----------------------------------------------------------------------;
extrn mhz_msg:abs
extrn cpu_freq:word
extrn display_ax:near
extrn get_reset_id:near
extrn write_tty:near
extrn display_message_set0:near
public display_cpu_clock
display_cpu_clock:
pusha
mov ax,cs:cpu_freq
call display_ax
mov bh,mhz_msg
call display_message_set0
popa
ret
;-----------------------------------------------------------------------;
;-----------------------------------------------------------------------;
; SILENT BOOT HOOKS ;
;-----------------------------------------------------------------------;
IF MKF_SILENT_BOOT
;-----------------------------------------------------------------------;
; OEM_INIT_SILENT_BOOT ;
; this routine initializes any OEM specific stuff for silent boot. this ;
; routine is called from INIT_SILENT_BOOT routine at check point 37h ;
; while initializing the data areas needed for silent boot. ;
; allowed. ;
; input : ;
; none ;
; output: ;
; none ;
; register usage : Do not destroy any register ;
; ;
; IMPLEMENTATION NOTE ;
; 1. This routine can be used to initialize any OEM specific data area ;
; which can be used to display any OEM specific stuff dynamically e.g. ;
; status of BIOS POST progress. ;
; 2. A 16 byte data area VideoOemData is defined for this purpose in ;
; DIMDATASEG. ;
;-----------------------------------------------------------------------;
public oem_init_silent_boot
oem_init_silent_boot:
ret
;-----------------------------------------------------------------------;
; OEM_DYNAMIC_SILENT_BOOT_DISPLAY ;
; this routine is called from INT1C handler inside timer interrupt if ;
; the current active display is OEM. ;
; input : ;
; none ;
; EOI has not yet been issued to Interrupt Controller ;
; output: ;
; none ;
; register usage : Do not destroy any register ;
; ;
; IMPLEMENTATION NOTE ;
; 1. This routine can be used to display any OEM specific dynamic ;
; information e.g. status of BIOS POST progress. ;
; 2. If any data area is needed for this, 16 byte data area VideoOemData;
; is defined for this purpose in DIMDATASEG. This data area should be ;
; initialized in OEM_INIT_SILENT_BOOT hook and can be updated in this ;
; hook. ;
; 3. Use INT 10h to display anything from here. DO NOT USE any BIOS ;
; display routines because BIOS display routines will put the concerned ;
; charecters in the local buffer instead of on the screen because at ;
; this time the current active display is OEM. ;
;-----------------------------------------------------------------------;
public oem_dynamic_silent_boot_display
oem_dynamic_silent_boot_display:
ret
;-----------------------------------------------------------------------;
; CHANGE_BACK_TO_OEM_DISPLAY ;
; this routine returns whether the change back to OEM display mode is ;
; allowed. ;
; input : ;
; none ;
; output: ;
; CY change back to OEM display mode allowed ;
; NC change back to OEM display mode not allowed ;
; register usage : Do not destroy any register ;
; ;
; IMPLEMENTATION NOTE ;
; 1. This routine is called when at least one transition from OEM ;
; display mode to BIOS display mode has already been happened and a ;
; request has come again to change the display mode to OEM. ;
; 2. This routine should return the information whether the change back ;
; to OEM display mode is allowed or not. ;
; 3. If change back to OEM display mode is allowed, the display mode ;
; can be toggled by pressing the hot key even if the display was forced ;
; to change to BIOS display mode for some reason (e.g. some error ;
; display, etc.). ;
; 4. If change back to OEM display mode is not allowed, the display mode;
; can not be changed back to OEM (i.e. it will in BIOS display mode) if ;
; the display mode was changed to BIOS display mode for some reason ;
; (e.g. toggle hot key is pressed, soft error display, etc.). ;
; 5. Default implementation is ;
; STC ; change back to OEM display allowed ;
; RET ;
; 6. If change back to OEM display mode is not allowed, the code of this;
; routine will be ;
; CLC ; change back to OEM display NOT allowed ;
; RET ;
;-----------------------------------------------------------------------;
public change_back_to_oem_display
change_back_to_oem_display:
stc ; CY, change back to OEM display allowed
ret
;-----------------------------------------------------------------------;
; CHANGE_DISPLAY_TO_OEM ;
; this routine changes the display to OEM display mode and is called ;
; from INT1C handler inside timer interrupt when display mode needs to ;
; be changed to OEM mode. ;
; input : ;
; none ;
; EOI has not yet been issued to Interrupt Controller ;
; output: ;
; NC display change successful ;
; CY display change not successful ;
; register usage : Do not destroy any register ;
; ;
; IMPLEMENTATION NOTE ;
; 1. This routine will be called whenever display needs to changed to ;
; OEM display mode. ;
; 2. Uncompress the OEM logo module, save the segment where the OEM logo;
; module is uncompressed, give control to OEM logo module to display the;
; OEM logo. ;
; 3. The OEM Logo Module ID is 0Eh. ;
; 5. The OEM Logo Module can be incorporated into the system ROM image ;
; by AMIMM utility. ;
; 6. If you need to have separate module for OEM Logo Code and Data, ;
; use Module ID 0Eh for Code and any user defined module ID for Data. ;
; 7. The necessary data areas in DIMDATASEG is ;
; OemSegment DW ; contain the segment where the ;
; ; OEM logo module is uncompressed ;
; ;
; IMPLEMENTATION ALGORITHM ;
; Step-0: Check whether OEM logo module is already uncompressed in ;
; OemSegment. If already uncompressed, go to Setp-4. ;
; Step-1: Uncompress the OEM logo module. ;
; Step-2: If uncompress is not successful, Set Carry flag (CY), Exit. ;
; Step-3: Save the segment where OEM logo module is uncompressed in ;
; OemSegment data area in DIMDATASEG. ;
; Step-4: Give control to OEM logo module. ;
; Step-5: Reset carry flag (NC), Exit. ;
; ;
; OEM LOGO MODULE FORMAT ;
; Note that this format is a suggesstion only (the code given here is ;
; written based on this format). Any format is allowed in which case ;
; the code in this routine needs to be modified accordingly. ;
; ;
; Offset-0: Word having the signature 55AA. ;
; Offset-2: Byte having the module size in 512Bytes unit. ;
; Offset-3: The entry point of OEM logo display module. ;
; ;
;-----------------------------------------------------------------------;
extrn uncom_segment:word
extrn scratch_segment:word
extrn uncompress_general_module:near
public change_display_to_oem
change_display_to_oem:
push es
push ds
pushad
push DIMDATASEG
pop ds
mov ds,ds:word ptr OemSegment
cmp ds:word ptr [0000h],0aa55h
jz short cdto_01 ; OEM module already uncompressed
;---------------------------------------;
; uncompress OEM code
cli
mov ax,cgroup:uncom_segment
mov ds:word ptr OemSegment,ax
mov es,ax
mov ds,cgroup:scratch_segment
mov bl,graphic_logo_code_id
call uncompress_general_module; uncompress OEM module
stc ; display change not successful
jnz short cdto_00 ; no OEM module present
;---------------------------------------;
;; PaiLin {
;; for 256 color Logo
mov es,cgroup:uncom_segment
mov ds,cgroup:scratch_segment
mov bl,33h;graphic_logo_data_id
call uncompress_general_module; uncompress OEM module
stc ; display change not successful
jnz short cdto_00 ; no OEM module present
; push ds
; push DIMDATASEG
; pop ds
; mov ax,cgroup:uncom_segment
; shr cx,4
; add ax,cx
; mov ds:word ptr OemSegment,ax
; mov es,ax
; mov ds,cgroup:scratch_segment
; mov bl,graphic_logo_data_id
; call uncompress_general_module; uncompress OEM module
; stc ; display change not successful
; pop ds
; jnz short cdto_00 ; no OEM module present
;; } PaiLin
;---------------------------------------;
cdto_01:
sti
push cs
push offset cgroup:cdto_ret
push ds
push 0003h ; OEM routine offset is at 0003h
retf
cdto_ret:
clc ; display change successful
cdto_00:
sti
popad
pop ds
pop es
ret
;-----------------------------------------------------------------------;
ENDIF
;-----------------------------------------------------------------------;
; GET_ONBOARD_DEVICE_INFO ;
; this routine returns the information of concerned onboard device. ;
; input : ;
; DS:SI ptr to concerned onboard device data structure ;
; (See Note-1 for device type details) ;
; output: ;
; CY error (e.g. routine is not implemented) ;
; (in this case, device will be assumed to be disabled) ;
; NC successful ;
; AL 00, onboard device is disabled ;
; 01, onboard device is enabled ;
; register usage : do not destroy any register except AL ;
; NOTE: ;
; 1. The input DS:SI points to the start of the concerned onboard device;
; device information structure. The bit6-0 of the byte at offset-4 of ;
; the structure contains the device type information as follows: ;
; device type device ;
; 00 Undefined ;
; 01 Other ;
; 02 Unknown ;
; 03 Video ;
; 04 SCSI Controller ;
; 05 Ethernet ;
; 06 Token Ring ;
; 07 Sound ;
; 08-7F Undefined ;
; 2. If the device type is Undefined, return with AL = 00, disabled ;
;-----------------------------------------------------------------------;
public get_onboard_device_info
get_onboard_device_info:
stc
ret
;-----------------------------------------------------------------------;
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