forked from KolibriOS/kolibrios
1281 lines
38 KiB
PHP
1281 lines
38 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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; Low-level driver for HDD access
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; DMA support by Mario79
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; Access through BIOS by diamond
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; LBA48 support by Mario79
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;-----------------------------------------------------------------------------
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struct HD_DATA
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hdbase dd ?
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hdid dd ?
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hdpos dd ?
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ends
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iglobal
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align 4
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ide_callbacks:
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dd ide_callbacks.end - ide_callbacks ; strucsize
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dd 0 ; no close function
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dd 0 ; no closemedia function
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dd ide_querymedia
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dd ide_read
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dd ide_write
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dd 0 ; no flush function
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dd 0 ; use default cache size
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.end:
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bd_callbacks:
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dd bd_callbacks.end - bd_callbacks ; strucsize
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dd 0 ; no close function
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dd 0 ; no closemedia function
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dd bd_querymedia
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dd bd_read_interface
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dd bd_write_interface
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dd 0 ; no flush function
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dd 0 ; use default cache size
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.end:
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hd0_data HD_DATA ?, 0, 1
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hd1_data HD_DATA ?, 0x10, 2
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hd2_data HD_DATA ?, 0, 3
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hd3_data HD_DATA ?, 0x10, 4
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endg
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uglobal
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ide_mutex MUTEX
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ide_channel1_mutex MUTEX
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ide_channel2_mutex MUTEX
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endg
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proc ide_read stdcall uses edi, \
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hd_data, buffer, startsector:qword, numsectors
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; hd_data = pointer to hd*_data
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; buffer = pointer to buffer for data
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; startsector = 64-bit start sector
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; numsectors = pointer to number of sectors on input,
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; must be filled with number of sectors really read
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locals
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sectors_todo dd ?
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channel_lock dd ?
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endl
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; 1. Initialize number of sectors: get number of requested sectors
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; and say that no sectors were read yet.
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mov ecx, [numsectors]
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mov eax, [ecx]
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mov dword [ecx], 0
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mov [sectors_todo], eax
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; 2. Acquire the global lock.
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mov ecx, ide_mutex
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call mutex_lock
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mov ecx, ide_channel2_mutex
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mov eax, [hd_data]
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cmp [eax+HD_DATA.hdbase], 0x1F0
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jne .IDE_Channel_2
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mov ecx, ide_channel1_mutex
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.IDE_Channel_2:
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mov [channel_lock], ecx
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call mutex_lock
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; 3. Convert parameters to the form suitable for worker procedures.
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; Underlying procedures do not know about 64-bit sectors.
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; Worker procedures use global variables and edi for [buffer].
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cmp dword [startsector+4], 0
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jnz .fail
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and [hd_error], 0
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mov ecx, [hd_data]
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mov eax, [ecx+HD_DATA.hdbase]
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mov [hdbase], eax
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mov eax, [ecx+HD_DATA.hdid]
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mov [hdid], eax
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mov eax, [ecx+HD_DATA.hdpos]
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mov [hdpos], eax
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mov eax, dword [startsector]
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mov edi, [buffer]
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; 4. Worker procedures take one sectors per time, so loop over all sectors to read.
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.sectors_loop:
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; DMA read is permitted if [allow_dma_access]=1 or 2
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cmp [allow_dma_access], 2
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ja .nodma
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cmp [dma_hdd], 1
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jnz .nodma
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call hd_read_dma
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jmp @f
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.nodma:
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call hd_read_pio
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@@:
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cmp [hd_error], 0
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jnz .fail
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mov ecx, [numsectors]
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inc dword [ecx] ; one more sector is read
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dec [sectors_todo]
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jz .done
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inc eax
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jnz .sectors_loop
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; 5. Loop is done, either due to error or because everything is done.
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; Release the global lock and return the corresponding status.
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.fail:
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mov ecx, [channel_lock]
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call mutex_unlock
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mov ecx, ide_mutex
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call mutex_unlock
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or eax, -1
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ret
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.done:
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mov ecx, [channel_lock]
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call mutex_unlock
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mov ecx, ide_mutex
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call mutex_unlock
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xor eax, eax
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ret
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endp
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proc ide_write stdcall uses esi edi, \
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hd_data, buffer, startsector:qword, numsectors
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; hd_data = pointer to hd*_data
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; buffer = pointer to buffer with data
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; startsector = 64-bit start sector
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; numsectors = pointer to number of sectors on input,
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; must be filled with number of sectors really written
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locals
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sectors_todo dd ?
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channel_lock dd ?
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endl
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; 1. Initialize number of sectors: get number of requested sectors
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; and say that no sectors were read yet.
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mov ecx, [numsectors]
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mov eax, [ecx]
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mov dword [ecx], 0
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mov [sectors_todo], eax
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; 2. Acquire the global lock.
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mov ecx, ide_mutex
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call mutex_lock
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mov ecx, ide_channel2_mutex
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mov eax, [hd_data]
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cmp [eax+HD_DATA.hdbase], 0x1F0
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jne .IDE_Channel_2
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mov ecx, ide_channel1_mutex
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.IDE_Channel_2:
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mov [channel_lock], ecx
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call mutex_lock
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; 3. Convert parameters to the form suitable for worker procedures.
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; Underlying procedures do not know about 64-bit sectors.
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; Worker procedures use global variables and esi for [buffer].
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cmp dword [startsector+4], 0
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jnz .fail
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and [hd_error], 0
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mov ecx, [hd_data]
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mov eax, [ecx+HD_DATA.hdbase]
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mov [hdbase], eax
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mov eax, [ecx+HD_DATA.hdid]
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mov [hdid], eax
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mov eax, [ecx+HD_DATA.hdpos]
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mov [hdpos], eax
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mov esi, [buffer]
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lea edi, [startsector]
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mov [cache_chain_ptr], edi
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; 4. Worker procedures take max 16 sectors per time,
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; loop until all sectors will be processed.
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.sectors_loop:
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mov ecx, 16
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cmp ecx, [sectors_todo]
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jbe @f
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mov ecx, [sectors_todo]
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@@:
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mov [cache_chain_size], cl
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; DMA write is permitted only if [allow_dma_access]=1
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cmp [allow_dma_access], 2
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jae .nodma
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cmp [dma_hdd], 1
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jnz .nodma
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call cache_write_dma
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jmp .common
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.nodma:
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mov [cache_chain_size], 1
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call cache_write_pio
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.common:
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cmp [hd_error], 0
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jnz .fail
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movzx ecx, [cache_chain_size]
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mov eax, [numsectors]
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add [eax], ecx
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sub [sectors_todo], ecx
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jz .done
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add [edi], ecx
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jc .fail
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shl ecx, 9
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add esi, ecx
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jmp .sectors_loop
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; 5. Loop is done, either due to error or because everything is done.
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; Release the global lock and return the corresponding status.
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.fail:
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mov ecx, [channel_lock]
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call mutex_unlock
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mov ecx, ide_mutex
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call mutex_unlock
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or eax, -1
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ret
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.done:
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mov ecx, [channel_lock]
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call mutex_unlock
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mov ecx, ide_mutex
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call mutex_unlock
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xor eax, eax
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ret
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endp
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; This is a stub.
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proc ide_querymedia stdcall, hd_data, mediainfo
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mov eax, [mediainfo]
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mov [eax+DISKMEDIAINFO.Flags], 0
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mov [eax+DISKMEDIAINFO.SectorSize], 512
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or dword [eax+DISKMEDIAINFO.Capacity], 0xFFFFFFFF
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or dword [eax+DISKMEDIAINFO.Capacity+4], 0xFFFFFFFF
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xor eax, eax
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ret
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endp
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proc bd_read_interface stdcall uses edi, \
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userdata, buffer, startsector:qword, numsectors
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; userdata = old [hdpos] = 80h + index in NumBiosDisks
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; buffer = pointer to buffer for data
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; startsector = 64-bit start sector
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; numsectors = pointer to number of sectors on input,
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; must be filled with number of sectors really read
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locals
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sectors_todo dd ?
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endl
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; 1. Initialize number of sectors: get number of requested sectors
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; and say that no sectors were read yet.
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mov ecx, [numsectors]
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mov eax, [ecx]
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mov dword [ecx], 0
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mov [sectors_todo], eax
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; 2. Acquire the global lock.
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mov ecx, ide_mutex
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call mutex_lock
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; 3. Convert parameters to the form suitable for worker procedures.
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; Underlying procedures do not know about 64-bit sectors.
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; Worker procedures use global variables and edi for [buffer].
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cmp dword [startsector+4], 0
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jnz .fail
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and [hd_error], 0
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mov eax, [userdata]
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mov [hdpos], eax
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mov eax, dword [startsector]
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mov edi, [buffer]
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; 4. Worker procedures take one sectors per time, so loop over all sectors to read.
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.sectors_loop:
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call bd_read
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cmp [hd_error], 0
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jnz .fail
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mov ecx, [numsectors]
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inc dword [ecx] ; one more sector is read
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dec [sectors_todo]
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jz .done
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inc eax
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jnz .sectors_loop
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; 5. Loop is done, either due to error or because everything is done.
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; Release the global lock and return the corresponding status.
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.fail:
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mov ecx, ide_mutex
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call mutex_unlock
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or eax, -1
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ret
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.done:
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mov ecx, ide_mutex
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call mutex_unlock
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xor eax, eax
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ret
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endp
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proc bd_write_interface stdcall uses esi edi, \
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userdata, buffer, startsector:qword, numsectors
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; userdata = old [hdpos] = 80h + index in NumBiosDisks
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; buffer = pointer to buffer with data
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; startsector = 64-bit start sector
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; numsectors = pointer to number of sectors on input,
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; must be filled with number of sectors really written
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locals
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sectors_todo dd ?
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endl
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; 1. Initialize number of sectors: get number of requested sectors
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; and say that no sectors were read yet.
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mov ecx, [numsectors]
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mov eax, [ecx]
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mov dword [ecx], 0
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mov [sectors_todo], eax
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; 2. Acquire the global lock.
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mov ecx, ide_mutex
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call mutex_lock
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; 3. Convert parameters to the form suitable for worker procedures.
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; Underlying procedures do not know about 64-bit sectors.
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; Worker procedures use global variables and esi for [buffer].
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cmp dword [startsector+4], 0
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jnz .fail
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and [hd_error], 0
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mov eax, [userdata]
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mov [hdpos], eax
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mov esi, [buffer]
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lea edi, [startsector]
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mov [cache_chain_ptr], edi
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; 4. Worker procedures take max 16 sectors per time,
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; loop until all sectors will be processed.
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.sectors_loop:
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mov ecx, 16
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cmp ecx, [sectors_todo]
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jbe @f
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mov ecx, [sectors_todo]
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@@:
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mov [cache_chain_size], cl
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call bd_write_cache_chain
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cmp [hd_error], 0
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jnz .fail
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movzx ecx, [cache_chain_size]
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mov eax, [numsectors]
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add [eax], ecx
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sub [sectors_todo], ecx
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jz .done
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add [edi], ecx
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jc .fail
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shl ecx, 9
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add esi, ecx
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jmp .sectors_loop
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; 5. Loop is done, either due to error or because everything is done.
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; Release the global lock and return the corresponding status.
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.fail:
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mov ecx, ide_mutex
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call mutex_unlock
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or eax, -1
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ret
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.done:
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mov ecx, ide_mutex
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call mutex_unlock
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xor eax, eax
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ret
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endp
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; This is a stub.
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proc bd_querymedia stdcall, hd_data, mediainfo
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mov eax, [mediainfo]
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mov [eax+DISKMEDIAINFO.Flags], 0
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mov [eax+DISKMEDIAINFO.SectorSize], 512
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or dword [eax+DISKMEDIAINFO.Capacity], 0xFFFFFFFF
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or dword [eax+DISKMEDIAINFO.Capacity+4], 0xFFFFFFFF
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xor eax, eax
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ret
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endp
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;-----------------------------------------------------------------------------
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align 4
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; input: eax = sector, edi -> buffer
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; output: edi = edi + 512
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hd_read_pio:
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push eax edx
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; Select the desired drive
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mov edx, [hdbase]
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add edx, 6 ;адрес регистра головок
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mov al, byte [hdid]
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add al, 128+64+32
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out dx, al; номер головки/номер диска
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call wait_for_hd_idle
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cmp [hd_error], 0
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jne hd_read_error
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; ATA with 28 or 48 bit for sector number?
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mov eax, [esp+4]
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cmp eax, 0x10000000
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jae .lba48
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;--------------------------------------
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.lba28:
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pushfd
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cli
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xor eax, eax
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mov edx, [hdbase]
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inc edx
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out dx, al ; ATA Features регистр "особенностей"
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inc edx
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inc eax
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out dx, al ; ATA Sector Counter счётчик секторов
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inc edx
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mov eax, [esp+4+4]
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out dx, al ; LBA Low LBA (7:0)
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shr eax, 8
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inc edx
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out dx, al ; LBA Mid LBA (15:8)
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shr eax, 8
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inc edx
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out dx, al ; LBA High LBA (23:16)
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shr eax, 8
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inc edx
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and al, 1+2+4+8 ; LBA (27:24)
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add al, byte [hdid]
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add al, 128+64+32
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out dx, al ; номер головки/номер диска
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inc edx
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mov al, 20h ; READ SECTOR(S)
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out dx, al ; ATACommand регистр команд
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popfd
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jmp .continue
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;--------------------------------------
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.lba48:
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pushfd
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cli
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xor eax, eax
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mov edx, [hdbase]
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inc edx
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out dx, al ; Features Previous Reserved
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out dx, al ; Features Current Reserved
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inc edx
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out dx, al ; Sector Count Previous Sector count (15:8)
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inc eax
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out dx, al ; Sector Count Current Sector count (7:0)
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inc edx
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mov eax, [esp+4+4]
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rol eax, 8
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out dx, al ; LBA Low Previous LBA (31:24)
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xor eax, eax ; because only 32 bit cache
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inc edx
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out dx, al ; LBA Mid Previous LBA (39:32)
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inc edx
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out dx, al ; LBA High Previous LBA (47:40)
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sub edx, 2
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mov eax, [esp+4+4]
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out dx, al ; LBA Low Current LBA (7:0)
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shr eax, 8
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inc edx
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out dx, al ; LBA Mid Current LBA (15:8)
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shr eax, 8
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inc edx
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out dx, al ; LBA High Current LBA (23:16)
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inc edx
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mov al, byte [hdid]
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add al, 128+64+32
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out dx, al ; номер головки/номер диска
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inc edx
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mov al, 24h ; READ SECTOR(S) EXT
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out dx, al ; ATACommand регистр команд
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popfd
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;--------------------------------------
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.continue:
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call wait_for_sector_buffer
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cmp [hd_error], 0
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jne hd_read_error
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pushfd
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cli
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mov ecx, 256
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mov edx, [hdbase]
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cld
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rep insw
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popfd
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pop edx eax
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ret
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;-----------------------------------------------------------------------------
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align 4
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; edi -> sector, esi -> data
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cache_write_pio:
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; Select the desired drive
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mov edx, [hdbase]
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add edx, 6 ;адрес регистра головок
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mov al, byte [hdid]
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add al, 128+64+32
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out dx, al ; номер головки/номер диска
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call wait_for_hd_idle
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cmp [hd_error], 0
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jne hd_write_error
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; ATA with 28 or 48 bit for sector number?
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mov eax, [edi]
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cmp eax, 0x10000000
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jae .lba48
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;--------------------------------------
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.lba28:
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pushfd
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cli
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xor eax, eax
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mov edx, [hdbase]
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inc edx
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out dx, al ; ATA Features регистр "особенностей"
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inc edx
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inc eax
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out dx, al ; ATA Sector Counter счётчик секторов
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inc edx
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mov eax, [edi] ; eax = sector to write
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out dx, al ; LBA Low LBA (7:0)
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shr eax, 8
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inc edx
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out dx, al ; LBA Mid LBA (15:8)
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shr eax, 8
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inc edx
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out dx, al ; LBA High LBA (23:16)
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shr eax, 8
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inc edx
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and al, 1+2+4+8 ; LBA (27:24)
|
|
add al, byte [hdid]
|
|
add al, 128+64+32
|
|
out dx, al ; номер головки/номер диска
|
|
inc edx
|
|
mov al, 30h ; WRITE SECTOR(S)
|
|
out dx, al ; ATACommand регистр команд
|
|
popfd
|
|
jmp .continue
|
|
;--------------------------------------
|
|
.lba48:
|
|
pushfd
|
|
cli
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al ; Features Previous Reserved
|
|
out dx, al ; Features Current Reserved
|
|
inc edx
|
|
out dx, al ; Sector Count Previous Sector count (15:8)
|
|
inc eax
|
|
out dx, al ; Sector Count Current Sector count (7:0)
|
|
inc edx
|
|
mov eax, [edi]
|
|
rol eax, 8
|
|
out dx, al ; LBA Low Previous LBA (31:24)
|
|
xor eax, eax ; because only 32 bit cache
|
|
inc edx
|
|
out dx, al ; LBA Mid Previous LBA (39:32)
|
|
inc edx
|
|
out dx, al ; LBA High Previous LBA (47:40)
|
|
sub edx, 2
|
|
mov eax, [edi]
|
|
out dx, al ; LBA Low Current LBA (7:0)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA Mid Current LBA (15:8)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA High Current LBA (23:16)
|
|
inc edx
|
|
mov al, byte [hdid]
|
|
add al, 128+64+32
|
|
out dx, al ; номер головки/номер диска
|
|
inc edx
|
|
mov al, 34h ; WRITE SECTOR(S) EXT
|
|
out dx, al ; ATACommand регистр команд
|
|
popfd
|
|
;--------------------------------------
|
|
.continue:
|
|
call wait_for_sector_buffer
|
|
|
|
cmp [hd_error], 0
|
|
jne hd_write_error
|
|
|
|
push ecx esi
|
|
|
|
pushfd
|
|
cli
|
|
mov ecx, 256
|
|
mov edx, [hdbase]
|
|
cld
|
|
rep outsw
|
|
popfd
|
|
|
|
pop esi ecx
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
save_hd_wait_timeout:
|
|
push eax
|
|
mov eax, [timer_ticks]
|
|
add eax, 300 ; 3 sec timeout
|
|
mov [hd_wait_timeout], eax
|
|
pop eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
check_hd_wait_timeout:
|
|
push eax
|
|
mov eax, [hd_wait_timeout]
|
|
cmp [timer_ticks], eax
|
|
jg hd_timeout_error
|
|
|
|
pop eax
|
|
mov [hd_error], 0
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
hd_timeout_error:
|
|
if lang eq sp
|
|
DEBUGF 1,"K : FS - HD tiempo de espera agotado\n"
|
|
else
|
|
DEBUGF 1,"K : FS - HD timeout\n"
|
|
end if
|
|
mov [hd_error], 1
|
|
pop eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
hd_read_error:
|
|
if lang eq sp
|
|
DEBUGF 1,"K : FS - HD error de lectura\n"
|
|
else
|
|
DEBUGF 1,"K : FS - HD read error\n"
|
|
end if
|
|
pop edx eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
hd_write_error_dma:
|
|
pop esi
|
|
hd_write_error:
|
|
if lang eq sp
|
|
DEBUGF 1,"K : FS - HD error de escritura\n"
|
|
else
|
|
DEBUGF 1,"K : FS - HD write error\n"
|
|
end if
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
hd_lba_error:
|
|
if lang eq sp
|
|
DEBUGF 1,"K : FS - HD error en LBA\n"
|
|
else
|
|
DEBUGF 1,"K : FS - HD LBA error\n"
|
|
end if
|
|
jmp LBA_read_ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
wait_for_hd_idle:
|
|
push eax edx
|
|
|
|
call save_hd_wait_timeout
|
|
|
|
mov edx, [hdbase]
|
|
add edx, 0x7
|
|
;--------------------------------------
|
|
align 4
|
|
wfhil1:
|
|
call check_hd_wait_timeout
|
|
cmp [hd_error], 0
|
|
jne @f
|
|
|
|
in al, dx
|
|
test al, 128
|
|
jnz wfhil1
|
|
|
|
@@:
|
|
pop edx eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
wait_for_sector_buffer:
|
|
push eax edx
|
|
|
|
mov edx, [hdbase]
|
|
add edx, 0x7
|
|
|
|
call save_hd_wait_timeout
|
|
;--------------------------------------
|
|
align 4
|
|
hdwait_sbuf: ; wait for sector buffer to be ready
|
|
call check_hd_wait_timeout
|
|
cmp [hd_error], 0
|
|
jne @f
|
|
|
|
in al, dx
|
|
test al, 8
|
|
jz hdwait_sbuf
|
|
|
|
mov [hd_error], 0
|
|
|
|
cmp [hd_setup], 1 ; do not mark error for setup request
|
|
je buf_wait_ok
|
|
|
|
test al, 1 ; previous command ended up with an error
|
|
jz buf_wait_ok
|
|
@@:
|
|
mov [hd_error], 1
|
|
|
|
buf_wait_ok:
|
|
pop edx eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
wait_for_sector_dma_ide0:
|
|
push eax
|
|
push edx
|
|
call save_hd_wait_timeout
|
|
;--------------------------------------
|
|
align 4
|
|
.wait:
|
|
call change_task
|
|
cmp [irq14_func], hdd_irq14
|
|
jnz .done
|
|
call check_hd_wait_timeout
|
|
cmp [hd_error], 0
|
|
jz .wait
|
|
mov [irq14_func], hdd_irq_null
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
mov al, 0
|
|
out dx, al
|
|
.done:
|
|
pop edx
|
|
pop eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
wait_for_sector_dma_ide1:
|
|
push eax
|
|
push edx
|
|
call save_hd_wait_timeout
|
|
;--------------------------------------
|
|
align 4
|
|
.wait:
|
|
call change_task
|
|
cmp [irq15_func], hdd_irq15
|
|
jnz .done
|
|
call check_hd_wait_timeout
|
|
cmp [hd_error], 0
|
|
jz .wait
|
|
mov [irq15_func], hdd_irq_null
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
add dx, 8
|
|
mov al, 0
|
|
out dx, al
|
|
.done:
|
|
pop edx
|
|
pop eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
iglobal
|
|
align 4
|
|
; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary
|
|
IDE_descriptor_table:
|
|
dd IDE_DMA
|
|
dw 0x2000
|
|
dw 0x8000
|
|
|
|
dma_cur_sector dd not 40h
|
|
dma_hdpos dd 0
|
|
irq14_func dd hdd_irq_null
|
|
irq15_func dd hdd_irq_null
|
|
endg
|
|
;-----------------------------------------------------------------------------
|
|
uglobal
|
|
; all uglobals are zeroed at boot
|
|
dma_process dd 0
|
|
dma_slot_ptr dd 0
|
|
cache_chain_pos dd 0
|
|
cache_chain_ptr dd 0
|
|
cache_chain_size db 0
|
|
cache_chain_started db 0
|
|
dma_task_switched db 0
|
|
dma_hdd db 0
|
|
allow_dma_access db 0
|
|
endg
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
hdd_irq14:
|
|
pushfd
|
|
cli
|
|
pushad
|
|
mov [irq14_func], hdd_irq_null
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
mov al, 0
|
|
out dx, al
|
|
popad
|
|
popfd
|
|
align 4
|
|
hdd_irq_null:
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
hdd_irq15:
|
|
pushfd
|
|
cli
|
|
pushad
|
|
mov [irq15_func], hdd_irq_null
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
add dx, 8
|
|
mov al, 0
|
|
out dx, al
|
|
popad
|
|
popfd
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
align 4
|
|
hd_read_dma:
|
|
push eax
|
|
push edx
|
|
mov edx, [dma_hdpos]
|
|
cmp edx, [hdpos]
|
|
jne .notread
|
|
mov edx, [dma_cur_sector]
|
|
cmp eax, edx
|
|
jb .notread
|
|
add edx, 15
|
|
cmp [esp+4], edx
|
|
ja .notread
|
|
mov eax, [esp+4]
|
|
sub eax, [dma_cur_sector]
|
|
shl eax, 9
|
|
add eax, (OS_BASE+IDE_DMA)
|
|
push ecx esi
|
|
mov esi, eax
|
|
|
|
mov ecx, 512/4
|
|
cld
|
|
rep movsd
|
|
pop esi ecx
|
|
pop edx
|
|
pop eax
|
|
ret
|
|
.notread:
|
|
mov eax, IDE_descriptor_table
|
|
mov dword [eax], IDE_DMA
|
|
mov word [eax+4], 0x2000
|
|
sub eax, OS_BASE
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
cmp [hdbase], 0x1F0
|
|
jz @f
|
|
add edx, 8
|
|
@@:
|
|
push edx
|
|
add edx, 4
|
|
out dx, eax
|
|
pop edx
|
|
mov al, 0
|
|
out dx, al
|
|
add edx, 2
|
|
mov al, 6
|
|
out dx, al
|
|
|
|
; Select the desired drive
|
|
mov edx, [hdbase]
|
|
add edx, 6 ; адрес регистра головок
|
|
mov al, byte [hdid]
|
|
add al, 128+64+32
|
|
out dx, al ; номер головки/номер диска
|
|
|
|
call wait_for_hd_idle
|
|
cmp [hd_error], 0
|
|
jnz hd_read_error
|
|
|
|
; ATA with 28 or 48 bit for sector number?
|
|
mov eax, [esp+4]
|
|
; -10h because the PreCache hits the boundary between lba28 and lba48
|
|
; 10h = 16 - size of PreCache
|
|
cmp eax, 0x10000000-10h
|
|
jae .lba48
|
|
;--------------------------------------
|
|
.lba28:
|
|
pushfd
|
|
cli
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al ; ATA Features регистр "особенностей"
|
|
inc edx
|
|
mov eax, 10h ; Sector Counter = 16 ; PreCache
|
|
out dx, al ; ATA Sector Counter счётчик секторов
|
|
inc edx
|
|
mov eax, [esp+4+4]
|
|
out dx, al ; LBA Low LBA (7:0)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA Mid LBA (15:8)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA High LBA (23:16)
|
|
shr eax, 8
|
|
inc edx
|
|
and al, 0xF ; LBA (27:24)
|
|
add al, byte [hdid]
|
|
add al, 11100000b
|
|
out dx, al ; номер головки/номер диска
|
|
inc edx
|
|
mov al, 0xC8 ; READ DMA
|
|
out dx, al ; ATACommand регистр команд
|
|
jmp .continue
|
|
;--------------------------------------
|
|
.lba48:
|
|
pushfd
|
|
cli
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al ; Features Previous Reserved
|
|
out dx, al ; Features Current Reserved
|
|
inc edx
|
|
out dx, al ; Sector Count Previous Sector count (15:8)
|
|
mov eax, 10h ; Sector Counter = 16 PreCache
|
|
out dx, al ; Sector Count Current Sector count (7:0)
|
|
inc edx
|
|
mov eax, [esp+4+4]
|
|
rol eax, 8
|
|
out dx, al ; LBA Low Previous LBA (31:24)
|
|
xor eax, eax ; because only 32 bit cache
|
|
inc edx
|
|
out dx, al ; LBA Mid Previous LBA (39:32)
|
|
inc edx
|
|
out dx, al ; LBA High Previous LBA (47:40)
|
|
sub edx, 2
|
|
mov eax, [esp+4+4]
|
|
out dx, al ; LBA Low Current LBA (7:0)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA Mid Current LBA (15:8)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA High Current LBA (23:16)
|
|
inc edx
|
|
mov al, byte [hdid]
|
|
add al, 128+64+32
|
|
out dx, al ; номер головки/номер диска
|
|
inc edx
|
|
mov al, 25h ; READ DMA EXT
|
|
out dx, al ; ATACommand регистр команд
|
|
;--------------------------------------
|
|
.continue:
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
mov eax, [hd_address_table]
|
|
cmp [hdbase], eax ; 0x1F0
|
|
jz @f
|
|
add dx, 8
|
|
@@:
|
|
mov al, 9
|
|
out dx, al
|
|
mov eax, [CURRENT_TASK]
|
|
mov [dma_process], eax
|
|
mov eax, [TASK_BASE]
|
|
mov [dma_slot_ptr], eax
|
|
mov eax, [hd_address_table]
|
|
cmp [hdbase], eax ; 0x1F0
|
|
jnz .ide1
|
|
mov [irq14_func], hdd_irq14
|
|
jmp @f
|
|
.ide1:
|
|
mov [irq15_func], hdd_irq15
|
|
@@:
|
|
popfd
|
|
mov eax, [hd_address_table]
|
|
cmp [hdbase], eax ; 0x1F0
|
|
jnz .wait_ide1
|
|
call wait_for_sector_dma_ide0
|
|
jmp @f
|
|
.wait_ide1:
|
|
call wait_for_sector_dma_ide1
|
|
@@:
|
|
cmp [hd_error], 0
|
|
jnz hd_read_error
|
|
mov eax, [hdpos]
|
|
mov [dma_hdpos], eax
|
|
pop edx
|
|
pop eax
|
|
mov [dma_cur_sector], eax
|
|
jmp hd_read_dma
|
|
;-----------------------------------------------------------------------------
|
|
cache_write_dma:
|
|
mov eax, [cache_chain_ptr]
|
|
push esi
|
|
mov eax, IDE_descriptor_table
|
|
mov edx, eax
|
|
pusha
|
|
mov edi, (OS_BASE+IDE_DMA)
|
|
mov dword [edx], IDE_DMA
|
|
movzx ecx, [cache_chain_size]
|
|
shl ecx, 9
|
|
mov word [edx+4], cx
|
|
shr ecx, 2
|
|
cld
|
|
rep movsd
|
|
popa
|
|
sub eax, OS_BASE
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
cmp [hdbase], 0x1F0
|
|
jz @f
|
|
add edx, 8
|
|
@@:
|
|
push edx
|
|
add edx, 4
|
|
out dx, eax
|
|
pop edx
|
|
mov al, 0
|
|
out dx, al
|
|
add edx, 2
|
|
mov al, 6
|
|
out dx, al
|
|
|
|
; Select the desired drive
|
|
mov edx, [hdbase]
|
|
add edx, 6 ; адрес регистра головок
|
|
mov al, byte [hdid]
|
|
add al, 128+64+32
|
|
out dx, al ; номер головки/номер диска
|
|
|
|
call wait_for_hd_idle
|
|
cmp [hd_error], 0
|
|
jnz hd_write_error_dma
|
|
|
|
; ATA with 28 or 48 bit for sector number?
|
|
mov esi, [cache_chain_ptr]
|
|
mov eax, [esi]
|
|
; -40h because the PreCache hits the boundary between lba28 and lba48
|
|
; 40h = 64 - the maximum number of sectors to be written for one command
|
|
cmp eax, 0x10000000-40h
|
|
jae .lba48
|
|
;--------------------------------------
|
|
.lba28:
|
|
pushfd
|
|
cli
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al ; ATA Features регистр "особенностей"
|
|
inc edx
|
|
mov al, [cache_chain_size] ; Sector Counter
|
|
out dx, al ; ATA Sector Counter счётчик секторов
|
|
inc edx
|
|
mov eax, [esi]
|
|
out dx, al ; LBA Low LBA (7:0)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA Mid LBA (15:8)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA High LBA (23:16)
|
|
shr eax, 8
|
|
inc edx
|
|
and al, 0xF ; LBA (27:24)
|
|
add al, byte [hdid]
|
|
add al, 11100000b
|
|
out dx, al ; номер головки/номер диска
|
|
inc edx
|
|
mov al, 0xCA ; WRITE DMA
|
|
out dx, al ; ATACommand регистр команд
|
|
jmp .continue
|
|
;--------------------------------------
|
|
.lba48:
|
|
pushfd
|
|
cli
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al ; Features Previous Reserved
|
|
out dx, al ; Features Current Reserved
|
|
inc edx
|
|
out dx, al ; Sector Count Previous Sector count (15:8)
|
|
mov al, [cache_chain_size] ; Sector Counter
|
|
out dx, al ; Sector Count Current Sector count (7:0)
|
|
inc edx
|
|
mov eax, [esi]
|
|
rol eax, 8
|
|
out dx, al ; LBA Low Previous LBA (31:24)
|
|
xor eax, eax ; because only 32 bit cache
|
|
inc edx
|
|
out dx, al ; LBA Mid Previous LBA (39:32)
|
|
inc edx
|
|
out dx, al ; LBA High Previous LBA (47:40)
|
|
sub edx, 2
|
|
mov eax, [esi]
|
|
out dx, al ; LBA Low Current LBA (7:0)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA Mid Current LBA (15:8)
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al ; LBA High Current LBA (23:16)
|
|
inc edx
|
|
mov al, byte [hdid]
|
|
add al, 128+64+32
|
|
out dx, al ; номер головки/номер диска
|
|
inc edx
|
|
mov al, 35h ; WRITE DMA EXT
|
|
out dx, al ; ATACommand регистр команд
|
|
;--------------------------------------
|
|
.continue:
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
mov eax, [hd_address_table]
|
|
cmp [hdbase], eax ; 0x1F0
|
|
jz @f
|
|
add dx, 8
|
|
@@:
|
|
mov al, 1
|
|
out dx, al
|
|
mov eax, [CURRENT_TASK]
|
|
mov [dma_process], eax
|
|
mov eax, [TASK_BASE]
|
|
mov [dma_slot_ptr], eax
|
|
mov eax, [hd_address_table]
|
|
cmp [hdbase], eax ; 0x1F0
|
|
jnz .ide1
|
|
mov [irq14_func], hdd_irq14
|
|
jmp @f
|
|
.ide1:
|
|
mov [irq15_func], hdd_irq15
|
|
@@:
|
|
popfd
|
|
mov [dma_cur_sector], not 0x40
|
|
mov eax, [hd_address_table]
|
|
cmp [hdbase], eax ; 0x1F0
|
|
jnz .wait_ide1
|
|
call wait_for_sector_dma_ide0
|
|
jmp @f
|
|
.wait_ide1:
|
|
call wait_for_sector_dma_ide1
|
|
@@:
|
|
cmp [hd_error], 0
|
|
jnz hd_write_error_dma
|
|
pop esi
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
uglobal
|
|
IDEContrRegsBaseAddr dw ?
|
|
IDEContrProgrammingInterface dw ?
|
|
IDE_BAR0_val dw ?
|
|
IDE_BAR1_val dw ?
|
|
IDE_BAR2_val dw ?
|
|
IDE_BAR3_val dw ?
|
|
endg
|
|
;-----------------------------------------------------------------------------
|
|
; \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}
|