forked from KolibriOS/kolibrios
294 lines
9.0 KiB
PHP
294 lines
9.0 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; ;;
|
|
;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
|
|
;; Distributed under terms of the GNU General Public License ;;
|
|
;; ;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
$Revision$
|
|
|
|
|
|
; Access through BIOS by diamond
|
|
iglobal
|
|
align 4
|
|
bd_callbacks:
|
|
dd bd_callbacks.end - bd_callbacks ; strucsize
|
|
dd 0 ; no close function
|
|
dd 0 ; no closemedia function
|
|
dd bd_querymedia
|
|
dd bd_read_interface
|
|
dd bd_write_interface
|
|
dd 0 ; no flush function
|
|
dd 0 ; use default cache size
|
|
.end:
|
|
endg
|
|
|
|
proc bd_read_interface stdcall uses edi, \
|
|
userdata, buffer, startsector:qword, numsectors
|
|
; userdata = old [hdpos] = 80h + index in NumBiosDisks
|
|
; buffer = pointer to buffer for data
|
|
; startsector = 64-bit start sector
|
|
; numsectors = pointer to number of sectors on input,
|
|
; must be filled with number of sectors really read
|
|
locals
|
|
sectors_todo dd ?
|
|
endl
|
|
; 1. Initialize number of sectors: get number of requested sectors
|
|
; and say that no sectors were read yet.
|
|
mov ecx, [numsectors]
|
|
mov eax, [ecx]
|
|
mov dword [ecx], 0
|
|
mov [sectors_todo], eax
|
|
; 2. Acquire the global lock.
|
|
mov ecx, ide_mutex
|
|
call mutex_lock
|
|
; 3. Convert parameters to the form suitable for worker procedures.
|
|
; Underlying procedures do not know about 64-bit sectors.
|
|
; Worker procedures use global variables and edi for [buffer].
|
|
cmp dword [startsector+4], 0
|
|
jnz .fail
|
|
and [hd_error], 0
|
|
mov eax, [userdata]
|
|
mov [hdpos], eax
|
|
mov eax, dword [startsector]
|
|
mov edi, [buffer]
|
|
; 4. Worker procedures take one sectors per time, so loop over all sectors to read.
|
|
.sectors_loop:
|
|
call bd_read
|
|
cmp [hd_error], 0
|
|
jnz .fail
|
|
mov ecx, [numsectors]
|
|
inc dword [ecx] ; one more sector is read
|
|
dec [sectors_todo]
|
|
jz .done
|
|
inc eax
|
|
jnz .sectors_loop
|
|
; 5. Loop is done, either due to error or because everything is done.
|
|
; Release the global lock and return the corresponding status.
|
|
.fail:
|
|
mov ecx, ide_mutex
|
|
call mutex_unlock
|
|
or eax, -1
|
|
ret
|
|
.done:
|
|
mov ecx, ide_mutex
|
|
call mutex_unlock
|
|
xor eax, eax
|
|
ret
|
|
endp
|
|
|
|
proc bd_write_interface stdcall uses esi edi, \
|
|
userdata, buffer, startsector:qword, numsectors
|
|
; userdata = old [hdpos] = 80h + index in NumBiosDisks
|
|
; buffer = pointer to buffer with data
|
|
; startsector = 64-bit start sector
|
|
; numsectors = pointer to number of sectors on input,
|
|
; must be filled with number of sectors really written
|
|
locals
|
|
sectors_todo dd ?
|
|
endl
|
|
; 1. Initialize number of sectors: get number of requested sectors
|
|
; and say that no sectors were read yet.
|
|
mov ecx, [numsectors]
|
|
mov eax, [ecx]
|
|
mov dword [ecx], 0
|
|
mov [sectors_todo], eax
|
|
; 2. Acquire the global lock.
|
|
mov ecx, ide_mutex
|
|
call mutex_lock
|
|
; 3. Convert parameters to the form suitable for worker procedures.
|
|
; Underlying procedures do not know about 64-bit sectors.
|
|
; Worker procedures use global variables and esi for [buffer].
|
|
cmp dword [startsector+4], 0
|
|
jnz .fail
|
|
and [hd_error], 0
|
|
mov eax, [userdata]
|
|
mov [hdpos], eax
|
|
mov esi, [buffer]
|
|
lea edi, [startsector]
|
|
mov [cache_chain_ptr], edi
|
|
; 4. Worker procedures take max 16 sectors per time,
|
|
; loop until all sectors will be processed.
|
|
.sectors_loop:
|
|
mov ecx, 16
|
|
cmp ecx, [sectors_todo]
|
|
jbe @f
|
|
mov ecx, [sectors_todo]
|
|
@@:
|
|
mov [cache_chain_size], cl
|
|
call bd_write_cache_chain
|
|
cmp [hd_error], 0
|
|
jnz .fail
|
|
movzx ecx, [cache_chain_size]
|
|
mov eax, [numsectors]
|
|
add [eax], ecx
|
|
sub [sectors_todo], ecx
|
|
jz .done
|
|
add [edi], ecx
|
|
jc .fail
|
|
shl ecx, 9
|
|
add esi, ecx
|
|
jmp .sectors_loop
|
|
; 5. Loop is done, either due to error or because everything is done.
|
|
; Release the global lock and return the corresponding status.
|
|
.fail:
|
|
mov ecx, ide_mutex
|
|
call mutex_unlock
|
|
or eax, -1
|
|
ret
|
|
.done:
|
|
mov ecx, ide_mutex
|
|
call mutex_unlock
|
|
xor eax, eax
|
|
ret
|
|
endp
|
|
|
|
; This is a stub.
|
|
proc bd_querymedia stdcall, hd_data, mediainfo
|
|
mov eax, [mediainfo]
|
|
mov [eax+DISKMEDIAINFO.Flags], 0
|
|
mov [eax+DISKMEDIAINFO.SectorSize], 512
|
|
or dword [eax+DISKMEDIAINFO.Capacity], 0xFFFFFFFF
|
|
or dword [eax+DISKMEDIAINFO.Capacity+4], 0xFFFFFFFF
|
|
xor eax, eax
|
|
ret
|
|
endp
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; \begin{diamond}
|
|
uglobal
|
|
bios_hdpos dd 0 ; 0 is invalid value for [hdpos]
|
|
bios_cur_sector dd ?
|
|
bios_read_len dd ?
|
|
endg
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
bd_read:
|
|
push eax
|
|
push edx
|
|
mov edx, [bios_hdpos]
|
|
cmp edx, [hdpos]
|
|
jne .notread
|
|
mov edx, [bios_cur_sector]
|
|
cmp eax, edx
|
|
jb .notread
|
|
add edx, [bios_read_len]
|
|
dec edx
|
|
cmp eax, edx
|
|
ja .notread
|
|
sub eax, [bios_cur_sector]
|
|
shl eax, 9
|
|
add eax, (OS_BASE+0x9A000)
|
|
push ecx esi
|
|
mov esi, eax
|
|
mov ecx, 512/4
|
|
cld
|
|
rep movsd
|
|
pop esi ecx
|
|
pop edx
|
|
pop eax
|
|
ret
|
|
.notread:
|
|
push ecx
|
|
mov dl, 42h
|
|
mov ecx, 16
|
|
call int13_call
|
|
pop ecx
|
|
test eax, eax
|
|
jnz .v86err
|
|
test edx, edx
|
|
jz .readerr
|
|
mov [bios_read_len], edx
|
|
mov edx, [hdpos]
|
|
mov [bios_hdpos], edx
|
|
pop edx
|
|
pop eax
|
|
mov [bios_cur_sector], eax
|
|
jmp bd_read
|
|
.readerr:
|
|
.v86err:
|
|
mov [hd_error], 1
|
|
jmp hd_read_error
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
bd_write_cache_chain:
|
|
pusha
|
|
mov edi, OS_BASE + 0x9A000
|
|
movzx ecx, [cache_chain_size]
|
|
push ecx
|
|
shl ecx, 9-2
|
|
rep movsd
|
|
pop ecx
|
|
mov dl, 43h
|
|
mov eax, [cache_chain_ptr]
|
|
mov eax, [eax]
|
|
call int13_call
|
|
test eax, eax
|
|
jnz .v86err
|
|
cmp edx, ecx
|
|
jnz .writeerr
|
|
popa
|
|
ret
|
|
.v86err:
|
|
.writeerr:
|
|
popa
|
|
mov [hd_error], 1
|
|
jmp hd_write_error
|
|
;-----------------------------------------------------------------------------
|
|
uglobal
|
|
int13_regs_in rb sizeof.v86_regs
|
|
int13_regs_out rb sizeof.v86_regs
|
|
endg
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
int13_call:
|
|
; Because this code uses fixed addresses,
|
|
; it can not be run simultaniously by many threads.
|
|
; In current implementation it is protected by common mutex 'ide_status'
|
|
mov word [OS_BASE + 510h], 10h ; packet length
|
|
mov word [OS_BASE + 512h], cx ; number of sectors
|
|
mov dword [OS_BASE + 514h], 9A000000h ; buffer 9A00:0000
|
|
mov dword [OS_BASE + 518h], eax
|
|
and dword [OS_BASE + 51Ch], 0
|
|
push ebx ecx esi edi
|
|
mov ebx, int13_regs_in
|
|
mov edi, ebx
|
|
mov ecx, sizeof.v86_regs/4
|
|
xor eax, eax
|
|
rep stosd
|
|
mov byte [ebx+v86_regs.eax+1], dl
|
|
mov eax, [hdpos]
|
|
lea eax, [BiosDisksData+(eax-80h)*4]
|
|
mov dl, [eax]
|
|
mov byte [ebx+v86_regs.edx], dl
|
|
movzx edx, byte [eax+1]
|
|
; mov dl, 5
|
|
test edx, edx
|
|
jnz .hasirq
|
|
dec edx
|
|
jmp @f
|
|
.hasirq:
|
|
pushad
|
|
stdcall enable_irq, edx
|
|
popad
|
|
@@:
|
|
mov word [ebx+v86_regs.esi], 510h
|
|
mov word [ebx+v86_regs.ss], 9000h
|
|
mov word [ebx+v86_regs.esp], 0A000h
|
|
mov word [ebx+v86_regs.eip], 500h
|
|
mov [ebx+v86_regs.eflags], 20200h
|
|
mov esi, [sys_v86_machine]
|
|
mov ecx, 0x502
|
|
push fs
|
|
call v86_start
|
|
pop fs
|
|
and [bios_hdpos], 0
|
|
pop edi esi ecx ebx
|
|
movzx edx, byte [OS_BASE + 512h]
|
|
test byte [int13_regs_out+v86_regs.eflags], 1
|
|
jnz @f
|
|
mov edx, ecx
|
|
@@:
|
|
ret
|
|
; \end{diamond}
|