forked from KolibriOS/kolibrios
*Reduced size of boot code. (diamond)
*Debug API added. (diamond) git-svn-id: svn://kolibrios.org@40 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Andrey Halyavin (halyavin)
@@ -139,6 +139,14 @@ macro _setcursor row,column
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call setcursor
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}
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pagetable_set:
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or al, 7
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@@:
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stosd
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add eax, 1000h
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loop @b
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ret
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; 16-bit data
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; videomodes table
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gr_table:
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@@ -275,6 +283,7 @@ dfl1:
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cmp ax,dx
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jnz cpugood
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mov si,not386-0x10000
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sayerr:
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call print
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jmp $
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cpugood:
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@@ -347,9 +356,9 @@ wait_loop: ; variant 2
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jnz @f
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mov ax,[es:di+4]
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add ax,'0'*256+'0'
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mov [vervesa+vervesa_off-0x10000], ah
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mov [vervesa+vervesa_off+2-0x10000], al
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mov si,vervesa-0x10000
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mov si,vervesa-0x10000
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mov [si+vervesa_off], ah
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mov [si+vervesa_off+2], al
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@@: call print
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; \begin{diamond}[30.11.2005]
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@@ -360,36 +369,33 @@ cfgmanager:
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; b) preboot_mtrr = use hardware acceleration?
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; c) preboot_vrrm = use VRR?
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; d) preboot_device = from what boot?
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mov si, preboot_graph-0x10000
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mov di, preboot_graph-0x10000
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; check bootloader block
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cmp [.loader_block-0x10000], 0
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jz .noloaderblock
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les bx, [.loader_block-0x10000]
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cmp byte [es:bx], 1
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jz @f
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mov si, loader_block_error-0x10000
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call print
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jmp $
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@@:
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jnz sayerr
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test byte [es:bx+1], 1
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jz @f
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; image in memory present
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cmp [si+preboot_device-preboot_graph], 0
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cmp [di+preboot_device-preboot_graph], 0
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jnz @f
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mov [si+preboot_device-preboot_graph], 3
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mov [di+preboot_device-preboot_graph], 3
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@@:
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.noloaderblock:
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; determine default settings
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mov [.bSettingsChanged-0x10000], 0
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cmp byte [si], 0
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cmp byte [di], 0
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jnz .preboot_gr_end
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mov [si+preboot_gprobe-preboot_graph], 0
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mov [di+preboot_gprobe-preboot_graph], 0
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mov al, [vervesa+vervesa_off-0x10000]
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cmp al, 'x'
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jz .novesa
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cmp al, '1'
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jz .vesa12
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mov [si+preboot_gprobe-preboot_graph], 2
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mov [di+preboot_gprobe-preboot_graph], 2
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mov al, 3
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jmp @f
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.vesa12:
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@@ -398,14 +404,14 @@ cfgmanager:
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.novesa:
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mov al, 10
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@@:
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mov [si], al
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mov [di], al
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.preboot_gr_end:
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cmp [si+preboot_mtrr-preboot_graph], 1
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adc [si+preboot_mtrr-preboot_graph], 0
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cmp [si+preboot_vrrm-preboot_graph], 1
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adc [si+preboot_vrrm-preboot_graph], 0
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cmp [si+preboot_device-preboot_graph], 1
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adc [si+preboot_device-preboot_graph], 0
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cmp [di+preboot_mtrr-preboot_graph], 1
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adc [di+preboot_mtrr-preboot_graph], 0
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cmp [di+preboot_vrrm-preboot_graph], 1
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adc [di+preboot_vrrm-preboot_graph], 0
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cmp [di+preboot_device-preboot_graph], 1
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adc [di+preboot_device-preboot_graph], 0
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; notify user
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mov si, linef-0x10000
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call print
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@@ -457,21 +463,11 @@ cfgmanager:
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mov si, linef-0x10000
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call printplain
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mov si, mtrr_msg-0x10000
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call print
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mov si, on_msg-0x10000
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cmp [preboot_mtrr-0x10000], 1
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jz @f
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mov si, off_msg-0x10000
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@@:
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call printplain
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call .say_on_off
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mov si, vrrm_msg-0x10000
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call print
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mov si, on_msg-0x10000
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cmp [preboot_vrrm-0x10000], 1
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jz @f
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mov si, off_msg-0x10000
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@@:
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call printplain
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call .say_on_off
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mov si, preboot_device_msg-0x10000
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call print
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mov al, [preboot_device-0x10000]
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@@ -479,7 +475,6 @@ cfgmanager:
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mov si, [preboot_device_msgs-0x10000+eax*2]
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call printplain
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.wait:
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; empty BIOS keyboard buffer
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_setcursor 25,0 ; out of screen
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; set timer interrupt handler
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cli
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@@ -497,9 +492,9 @@ cfgmanager:
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; restore timer interrupt
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push 0
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pop es
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mov ecx, [.oldtimer-0x10000]
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mov [es:8*4], ecx
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mov [.timer-0x10000], ecx
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mov eax, [.oldtimer-0x10000]
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mov [es:8*4], eax
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mov [.timer-0x10000], eax
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_setcursor 7,0
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mov si, space_msg-0x10000
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call printplain
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@@ -518,13 +513,13 @@ cfgmanager:
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jnz .wait
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_setcursor 15,0
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mov si,bdev-0x10000
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call printplain
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call print
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mov bx,'13'
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call getkey
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mov [preboot_device-0x10000], al
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_setcursor 13,0
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.d:
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mov [.bSettingsChanged-0x10000], al
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mov [.bSettingsChanged-0x10000], 1
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mov si, space_msg-0x10000
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call printplain
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_setcursor 15,0
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@@ -553,7 +548,7 @@ cfgmanager:
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.change_b:
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_setcursor 15,0
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mov si, gr_acc-0x10000
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call printplain
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call print
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mov bx, '12'
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call getkey
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mov [preboot_mtrr-0x10000], al
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@@ -562,16 +557,28 @@ cfgmanager:
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.change_c:
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_setcursor 15,0
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mov si, vrrmprint-0x10000
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call printplain
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call print
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mov bx, '12'
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call getkey
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mov [preboot_vrrm-0x10000], al
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_setcursor 12,0
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jmp .d
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.say_on_off:
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pushf
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call print
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mov si, on_msg-0x10000
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popf
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jz @f
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mov si, off_msg-0x10000
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@@: call printplain
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ret
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; novesa and vervesa strings are not used at the moment of executing this code
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virtual at novesa
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.oldtimer dd ?
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.starttime dd ?
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.bSettingsChanged db ?
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.timer dd ?
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end virtual
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.loader_block dd 0
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.gettime:
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mov ah, 0
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@@ -672,9 +679,9 @@ end if
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.cont:
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push cs
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pop ds
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mov byte [space_msg-0x10000+80], 0
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_setcursor 15,0
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mov si, space_msg-0x10000
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mov byte [si+80], 0
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_setcursor 15,0
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call printplain
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_setcursor 15,0
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.load:
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@@ -683,13 +690,6 @@ end if
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; ASK GRAPHICS MODE
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movzx ax, [preboot_graph-0x10000]
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test ax, ax
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jne pre_graph
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mov si,gr_mode-0x10000
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call printplain
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mov bx,'09'
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call getkey
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pre_graph:
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push 0
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pop es
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; address is gr_table+6*(ax-1)-0x10000
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@@ -699,77 +699,51 @@ end if
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mov cx,[si+2]
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mov dx,[si+4]
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cmp al, 9*2
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mov al, 32 ; BPP
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jb @f
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mov byte [es:0x9000], 32
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mov [es:0x9000], al
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mov dword [es:0x9018], 0x800000
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@@:
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mov [es:0x9008],bx
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mov [es:0x900A],cx
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mov [es:0x900C],dx
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mov ax,32
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test bh, bh
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jz nov
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; USE DEFAULTS OR PROBE
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; bx - mode : cx - x size : dx - y size
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;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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movzx ax,[preboot_gprobe-0x10000]
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test ax,ax
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jne pre_probe
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;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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test bx,0100000000000000b
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jz noprobe
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mov si,probetext-0x10000
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call printplain
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push bx
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mov bx, '12'
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call getkey
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pop bx
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pre_probe:
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dec ax
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je noprobe
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push cx dx
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cmp [preboot_gprobe-0x10000], 1
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jz noprobe
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mov bx,0x100
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newprobe:
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inc bx
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cmp bx,0x17f
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jne probemore
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mov si,prnotfnd-0x10000
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call printplain
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jmp $
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mov si,prnotfnd-0x10000
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jz sayerr
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probemore:
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push cx
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mov ax,0x4f01
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mov cx,bx
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and cx,0xfff
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mov di,0xa000
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int 0x10
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pop cx
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test byte [es:di], 80h ; lfb?
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jz newprobe
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mov ax, [es:di+0x12] ; x size?
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cmp ax, [esp+2]
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cmp [es:di+0x12], cx ; x size?
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jnz newprobe
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cmp [es:di+0x14], dx ; y size?
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jnz newprobe
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cmp byte [es:di+0x19], 32 ;24
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jb newprobe
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add bx,0100000000000000b
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; add bx,0100000000000000b
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or bh, 40h
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mov [es:0x9008],bx
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pop dx cx
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noprobe:
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@@ -782,27 +756,26 @@ end if
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mov di,0xa000
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int 0x10
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; LFB
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mov ecx,[es:di+0x28]
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mov [es:0x9018],ecx
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mov eax,[es:di+0x28]
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mov [es:0x9018],eax
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; ---- vbe voodoo
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BytesPerScanLine equ 0x10
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mov ax, [es:di+BytesPerScanLine]
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mov [es:0x9001],ax
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; BPP
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movzx ax,byte [es:di+0x19]
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mov al,byte [es:di+0x19]
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mov [es:0x9000],al
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nov:
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cmp ax,24
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cmp al,24
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mov si,bt24-0x10000
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jz bppl
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cmp ax,32
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cmp al,32
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mov si,bt32-0x10000
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jz bppl
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mov si,btns-0x10000
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call print
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jmp $
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jmp sayerr
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bppl:
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call printplain
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call print
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; FIND VESA 1.2 PM BANK SWITCH ADDRESS
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@@ -825,33 +798,12 @@ end if
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; GRAPHICS ACCELERATION
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mov al, [preboot_mtrr-0x10000]
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test al,al
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jne pre_mtrr
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mov si,gr_acc-0x10000
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call printplain
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mov bx,'12'
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call getkey
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pre_mtrr:
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mov [es:0x901C],al
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; commented by diamond - newlines are not used now
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; mov si,linef-0x10000
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; call printplain
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; VRR_M USE
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mov al,[preboot_vrrm-0x10000]
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test al,al
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jne pre_vrrm
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mov si,vrrmprint-0x10000
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call print
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mov bx,'13'
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call getkey
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pre_vrrm:
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mov [es:0x9030],al
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; commented by diamond - newlines are not used now
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; mov si,linef2-0x10000
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; call printplain
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; MEMORY MODEL
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@@ -939,24 +891,12 @@ end if
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; BOOT DEVICE
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mov al, [preboot_device-0x10000]
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test al, al
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jnz pre_device
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mov si,bdev-0x10000
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call printplain
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mov bx,'13'
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call getkey
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pre_device:
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dec ax
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dec al
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mov [boot_dev-0x10000],al
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; commented by diamond - newlines are not used now
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; mov si,linef-0x10000
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; call printplain
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|
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|
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; READ DISKETTE TO MEMORY
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cmp [boot_dev-0x10000],0
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; cmp [boot_dev-0x10000],0
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jne no_sys_on_floppy
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mov si,diskload-0x10000
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call print
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@@ -979,6 +919,7 @@ end if
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cmp si,10
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jnz newread
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mov si,badsect-0x10000
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sayerr_plain:
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call printplain
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jmp $
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goodread:
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@@ -998,8 +939,7 @@ end if
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mov al,0
|
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out dx,al
|
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mov si,memmovefailed-0x10000
|
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call print
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jmp $
|
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jmp sayerr_plain
|
||||
goodmove:
|
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add dword [movedesc-0x10000+0x18+2], 512*18
|
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@@ -1030,8 +970,7 @@ end if
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||||
jnz reads
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readdone:
|
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pop ax
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mov si,backspace-0x10000
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call printplain
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mov si,backspace2-0x10000
|
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call printplain
|
||||
mov si,okt-0x10000
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call printplain
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||||
@@ -1054,30 +993,36 @@ end if
|
||||
pop es ; es:di = 6000:0
|
||||
xor di,di
|
||||
mov cx,256*map_mem ; Map (mapmem) M
|
||||
mov eax,7
|
||||
pt2:
|
||||
cmp cx,256*(map_mem-8) ; 8 M map to LFB
|
||||
jnz pt3
|
||||
pop eax
|
||||
add eax,7
|
||||
pt3:
|
||||
cmp cx,256*(map_mem-12) ; 12 M back to linear = physical
|
||||
jnz pt4
|
||||
mov eax,12*0x100000 + 7
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||||
pt4:
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||||
stosd
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||||
add eax,4096
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||||
loop pt2
|
||||
|
||||
; mov eax,7
|
||||
; pt2:
|
||||
; cmp cx,256*(map_mem-8) ; 8 M map to LFB
|
||||
; jnz pt3
|
||||
; pop eax
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||||
; add eax,7
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||||
; pt3:
|
||||
; cmp cx,256*(map_mem-12) ; 12 M back to linear = physical
|
||||
; jnz pt4
|
||||
; mov eax,12*0x100000 + 7
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||||
; pt4:
|
||||
; stosd
|
||||
; add eax,4096
|
||||
; loop pt2
|
||||
; initialize as identity mapping
|
||||
xor eax, eax
|
||||
call pagetable_set
|
||||
; 8M..12M map to LFB
|
||||
pop eax
|
||||
; mov cx, 256*4
|
||||
mov ch, 4
|
||||
mov di, 2000h
|
||||
call pagetable_set
|
||||
|
||||
push 0x7100
|
||||
pop es
|
||||
xor di,di
|
||||
mov eax,8*0x100000+7
|
||||
mov eax,8*0x100000
|
||||
mov cx,256*4
|
||||
pt5:
|
||||
stosd
|
||||
add eax,0x1000
|
||||
loop pt5
|
||||
call pagetable_set
|
||||
|
||||
; 4 KB PAGE DIRECTORY
|
||||
|
||||
@@ -1086,15 +1031,12 @@ end if
|
||||
xor di, di
|
||||
mov cx, 64 / 4
|
||||
mov eax, 0x60007 ; for 0 M
|
||||
pd4k:
|
||||
stosd
|
||||
add eax, 0x1000
|
||||
loop pd4k
|
||||
call pagetable_set
|
||||
mov dword [es:0x800],0x71007 ;map region 0x80000000-0x803FFFFF to 0x800000-0xCFFFFF
|
||||
xor si,si
|
||||
mov di,second_base_address shr 20
|
||||
mov cx,64/4
|
||||
rep movs dword [es:di], [es:si]
|
||||
mov cx,64/2
|
||||
rep movs word [es:di], [es:si]
|
||||
|
||||
mov eax, 0x7F000 +8+16 ; Page directory and enable caches
|
||||
mov cr3, eax
|
||||
@@ -1102,9 +1044,8 @@ end if
|
||||
; SET GRAPHICS
|
||||
|
||||
pop es
|
||||
mov bx,[es:0x9008] ; vga & 320x200
|
||||
mov ax, bx
|
||||
push ax
|
||||
mov ax,[es:0x9008] ; vga & 320x200
|
||||
mov bx, ax
|
||||
cmp ax,0x13
|
||||
je setgr
|
||||
cmp ax,0x12
|
||||
@@ -1113,18 +1054,15 @@ end if
|
||||
setgr:
|
||||
int 0x10
|
||||
test ah,ah
|
||||
jz gmok
|
||||
mov si,fatalsel-0x10000
|
||||
call print
|
||||
jmp $
|
||||
|
||||
gmok:
|
||||
mov si, fatalsel-0x10000
|
||||
jnz sayerr
|
||||
; set mode 0x12 graphics registers:
|
||||
cmp bx,0x12
|
||||
jne gmok2
|
||||
|
||||
mov al,0x05
|
||||
mov dx,0x03ce
|
||||
push dx
|
||||
out dx,al ; select GDC mode register
|
||||
mov al,0x02
|
||||
inc dx
|
||||
@@ -1138,7 +1076,7 @@ end if
|
||||
out dx,al ; set mask for all planes 0-3
|
||||
|
||||
mov al,0x08
|
||||
mov dx,0x03ce
|
||||
pop dx
|
||||
out dx,al ; select GDC bit mask register
|
||||
; for writes to 0x03cf
|
||||
|
||||
|
||||
Reference in New Issue
Block a user