859 lines
19 KiB
PHP
Executable File
859 lines
19 KiB
PHP
Executable File
; Low-level driver for HDD access
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; DMA support by Mario79
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;**************************************************************************
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;
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; 0x600008 - first entry in cache list
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;
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; +0 - lba sector
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; +4 - state of cache sector
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; 0 = empty
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; 1 = used for read ( same as in hd )
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; 2 = used for write ( differs from hd )
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;
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; +65536 - cache entries
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;
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;**************************************************************************
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align 4
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hd_read:
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;-----------------------------------------------------------
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; input : eax = block to read
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; ebx = destination
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;-----------------------------------------------------------
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and [hd_error], 0
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push ecx esi edi ; scan cache
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mov ecx,cache_max ; entries in cache
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mov esi,0x600000+8
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mov edi,1
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hdreadcache:
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cmp dword [esi+4],0 ; empty
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je nohdcache
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cmp [esi],eax ; correct sector
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je yeshdcache
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nohdcache:
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add esi,8
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inc edi
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dec ecx
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jnz hdreadcache
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call find_empty_slot ; ret in edi
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cmp [hd_error],0
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jne return_01
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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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lea esi,[edi*8+0x600000]
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mov [esi],eax ; sector number
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mov dword [esi+4],1 ; hd read - mark as same as in hd
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yeshdcache:
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mov esi,edi
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shl esi,9
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add esi,0x600000+65536
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mov edi,ebx
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mov ecx,512/4
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cld
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rep movsd ; move data
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return_01:
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pop edi esi ecx
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ret
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align 4
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hd_read_pio:
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push eax edx
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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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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 ; ATAFeatures ॣ¨áâà "®á®¡¥®á⥩"
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inc edx
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inc eax
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out dx,al ; ATASectorCount áçñâ稪 ᥪâ®à®¢
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inc edx
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mov eax,[esp+4]
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out dx,al ; ATASectorNumber ॣ¨áâà ®¬¥à ᥪâ®à
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shr eax,8
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inc edx
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out dx,al ; ATACylinder ®¬¥à 樫¨¤à (¬« ¤è¨© ¡ ©â)
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shr eax,8
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inc edx
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out dx,al ; ®¬¥à 樫¨¤à (áâ à訩 ¡ ©â)
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shr eax,8
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inc edx
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and al,1+2+4+8
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add al,byte [hdid]
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add al,128+64+32
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out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª
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inc edx
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mov al,20h
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out dx,al ; ATACommand ॣ¨áâà ª®¬ ¤
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sti
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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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cli
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push edi
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shl edi,9
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add edi,0x600000+65536
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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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pop edi
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sti
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pop edx eax
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ret
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disable_ide_int:
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; mov edx,[hdbase]
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; add edx,0x206
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; mov al,2
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; out dx,al
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cli
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ret
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enable_ide_int:
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; mov edx,[hdbase]
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; add edx,0x206
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; mov al,0
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; out dx,al
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sti
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ret
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align 4
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hd_write:
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;-----------------------------------------------------------
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; input : eax = block
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; ebx = pointer to memory
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;-----------------------------------------------------------
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push ecx esi edi
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; check if the cache already has the sector and overwrite it
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mov ecx,cache_max
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mov esi,0x600000+8
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mov edi,1
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hdwritecache:
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cmp dword [esi+4],0 ; if cache slot is empty
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je not_in_cache_write
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cmp [esi],eax ; if the slot has the sector
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je yes_in_cache_write
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not_in_cache_write:
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add esi,8
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inc edi
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dec ecx
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jnz hdwritecache
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; sector not found in cache
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; write the block to a new location
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call find_empty_slot ; ret in edi
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cmp [hd_error],0
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jne hd_write_access_denied
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lea esi,[edi*8+0x600000]
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mov [esi],eax ; sector number
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yes_in_cache_write:
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mov dword [esi+4],2 ; write - differs from hd
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shl edi,9
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add edi,0x600000+65536
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mov esi,ebx
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mov ecx,512/4
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cld
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rep movsd ; move data
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hd_write_access_denied:
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pop edi esi ecx
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ret
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write_cache:
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;-----------------------------------------------------------
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; write all changed sectors to disk
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;-----------------------------------------------------------
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push eax ecx edx esi edi
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; write difference ( 2 ) from cache to hd
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mov ecx,cache_max
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mov esi,0x600000+8
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mov edi,1
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write_cache_more:
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cmp dword [esi+4],2 ; if cache slot is not different
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jne .write_chain
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mov dword [esi+4],1 ; same as in hd
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mov eax,[esi] ; eax = sector to write
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cmp eax,[PARTITION_START]
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jb danger
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cmp eax,[PARTITION_END]
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ja danger
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cmp [allow_dma_write], 1
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jnz .nodma
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cmp [dma_hdd], 1
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jnz .nodma
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; Ž¡ê¥¤¨ï¥¬ § ¯¨áì 楯®çª¨ ¯®á«¥¤®¢ ⥫ìëå ᥪâ®à®¢ ¢ ®¤® ®¡à 饨¥ ª ¤¨áªã
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cmp ecx, 1
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jz .nonext
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cmp dword [esi+8+4], 2
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jnz .nonext
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push eax
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inc eax
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cmp eax, [esi+8]
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pop eax
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jnz .nonext
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cmp [cache_chain_started], 1
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jz @f
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mov [cache_chain_started], 1
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mov [cache_chain_size], 0
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mov [cache_chain_pos], edi
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mov [cache_chain_ptr], esi
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@@:
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inc [cache_chain_size]
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cmp [cache_chain_size], 64
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jnz .continue
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jmp .write_chain
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.nonext:
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call flush_cache_chain
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mov [cache_chain_size], 1
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mov [cache_chain_ptr], esi
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call write_cache_sector
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jmp .continue
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.nodma:
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call cache_write_pio
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.write_chain:
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call flush_cache_chain
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.continue:
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danger:
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add esi,8
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inc edi
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dec ecx
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jnz write_cache_more
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call flush_cache_chain
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return_02:
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pop edi esi edx ecx eax
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ret
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flush_cache_chain:
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cmp [cache_chain_started], 0
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jz @f
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call write_cache_chain
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mov [cache_chain_started], 0
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@@:
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ret
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align 4
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cache_write_pio:
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call disable_ide_int
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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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; 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
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inc edx
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inc eax
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out dx,al
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inc edx
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mov eax,[esi] ; eax = sector to write
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out dx,al
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shr eax,8
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inc edx
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out dx,al
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shr eax,8
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inc edx
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out dx,al
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shr eax,8
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inc edx
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and al,1+2+4+8
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add al,byte [hdid]
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add al,128+64+32
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out dx,al
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inc edx
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mov al,30h
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out dx,al
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; sti
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call wait_for_sector_buffer
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cmp [hd_error],0
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jne hd_write_error
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push ecx esi
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; cli
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mov esi,edi
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shl esi,9
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add esi,0x600000+65536 ; esi = from memory position
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mov ecx,256
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mov edx,[hdbase]
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cld
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rep outsw
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; sti
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call enable_ide_int
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pop esi ecx
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ret
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align 4
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find_empty_slot:
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;-----------------------------------------------------------
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; find empty or read slot, flush cache if next 10% is used by write
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; output : edi = cache slot
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;-----------------------------------------------------------
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; push ecx esi
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search_again:
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mov ecx,cache_max*10/100
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mov edi,[cache_search_start]
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search_for_empty:
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inc edi
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cmp edi,cache_max
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jbe inside_cache
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mov edi,1
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inside_cache:
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cmp dword [edi*8+0x600000+4],2 ; get cache slot info
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jb found_slot ; it's empty or read
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dec ecx
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jnz search_for_empty
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call write_cache ; no empty slots found, write all
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cmp [hd_error],0
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jne found_slot_access_denied
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jmp search_again ; and start again
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found_slot:
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mov [cache_search_start],edi
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found_slot_access_denied:
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ret
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align 4
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clear_hd_cache:
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push eax ecx edi
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mov edi,0x600000
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mov ecx,16384
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xor eax,eax
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cld
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rep stosd ; clear hd cache with 0
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mov [cache_search_start],eax
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mov [fat_in_cache],-1
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mov [fat_change],0
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pop edi ecx eax
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ret
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save_hd_wait_timeout:
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push eax
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mov eax,[timer_ticks];[0xfdf0]
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add eax,300 ; 3 sec timeout
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mov [hd_wait_timeout],eax
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pop eax
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ret
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align 4
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check_hd_wait_timeout:
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push eax
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mov eax,[hd_wait_timeout]
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cmp [timer_ticks], eax ;[0xfdf0],eax
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jg hd_timeout_error
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pop eax
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mov [hd_error],0
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ret
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iglobal
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hd_timeout_str db 'K : FS - HD timeout',13,10,0
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hd_read_str db 'K : FS - HD read error',13,10,0
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hd_write_str db 'K : FS - HD write error',13,10,0
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hd_lba_str db 'K : FS - HD LBA error',13,10,0
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endg
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hd_timeout_error:
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; call clear_hd_cache
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; call clear_application_table_status
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mov esi,hd_timeout_str
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call sys_msg_board_str
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; jmp $
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mov [hd_error],1
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pop eax
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ret
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hd_read_error:
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; call clear_hd_cache
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; call clear_application_table_status
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mov esi,hd_read_str
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call sys_msg_board_str
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pop edx eax
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ret
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hd_write_error:
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; call clear_hd_cache
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; call clear_application_table_status
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mov esi,hd_write_str
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call sys_msg_board_str
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ret
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hd_write_error_dma:
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; call clear_hd_cache
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; call clear_application_table_status
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mov esi, hd_write_str
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call sys_msg_board_str
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pop esi
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ret
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hd_lba_error:
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; call clear_hd_cache
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; call clear_application_table_status
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mov esi,hd_lba_str
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call sys_msg_board_str
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jmp LBA_read_ret
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align 4
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wait_for_hd_idle:
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push eax edx
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call save_hd_wait_timeout
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mov edx,[hdbase]
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add edx,0x7
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wfhil1:
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call check_hd_wait_timeout
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cmp [hd_error],0
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jne @f
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in al,dx
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test al,128
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jnz wfhil1
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@@:
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pop edx eax
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ret
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align 4
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wait_for_sector_buffer:
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push eax edx
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mov edx,[hdbase]
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add edx,0x7
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call save_hd_wait_timeout
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hdwait_sbuf: ; wait for sector buffer to be ready
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call check_hd_wait_timeout
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cmp [hd_error],0
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jne @f
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in al,dx
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test al,8
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jz hdwait_sbuf
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mov [hd_error],0
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cmp [hd_setup],1 ; do not mark error for setup request
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je buf_wait_ok
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test al,1 ; previous command ended up with an error
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jz buf_wait_ok
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@@:
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mov [hd_error],1
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buf_wait_ok:
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pop edx eax
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ret
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; \begin{Mario79}
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align 4
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wait_for_sector_dma_ide0:
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push eax
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push edx
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call save_hd_wait_timeout
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.wait:
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call change_task
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cmp [irq14_func], hdd_irq14
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jnz .done
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call check_hd_wait_timeout
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cmp [hd_error], 0
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jz .wait
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mov [irq14_func], hdd_irq_null
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mov dx, [IDEContrRegsBaseAddr]
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mov al, 0
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out dx, al
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.done:
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pop edx
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pop eax
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ret
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align 4
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wait_for_sector_dma_ide1:
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push eax
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push edx
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call save_hd_wait_timeout
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.wait:
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call change_task
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cmp [irq15_func], hdd_irq15
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jnz .done
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call check_hd_wait_timeout
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cmp [hd_error], 0
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jz .wait
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mov [irq15_func], hdd_irq_null
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mov dx, [IDEContrRegsBaseAddr]
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add dx, 8
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mov al, 0
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out dx, al
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.done:
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pop edx
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pop eax
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ret
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iglobal
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align 4
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; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary
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IDE_descriptor_table:
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dd 284000h
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dw 2000h
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dw 8000h
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dma_cur_sector dd not 40h
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irq14_func dd hdd_irq_null
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irq15_func dd hdd_irq_null
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endg
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uglobal
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; all uglobals are zeroed at boot
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dma_process dd 0
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dma_slot_ptr dd 0
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cache_chain_pos dd 0
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cache_chain_ptr dd 0
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cache_chain_size db 0
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cache_chain_started db 0
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dma_task_switched db 0
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dma_hdd db 0
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allow_dma_write db 0
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endg
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align 4
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hdd_irq14:
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pushfd
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cli
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pushad
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mov [irq14_func], hdd_irq_null
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mov dx, [IDEContrRegsBaseAddr]
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mov al, 0
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out dx, al
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call update_counters
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mov ebx, [dma_process]
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cmp [0x3000], ebx
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jz .noswitch
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mov [dma_task_switched], 1
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mov edi, [dma_slot_ptr]
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mov eax, [0x3000]
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mov [dma_process], eax
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mov eax, [0x3010]
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mov [dma_slot_ptr], eax
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mov [0x3000], ebx
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mov [0x3010], edi
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mov byte [0xFFFF], 1
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call do_change_task
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.noswitch:
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popad
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popfd
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align 4
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hdd_irq_null:
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ret
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|
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
|
|
call update_counters
|
|
mov ebx, [dma_process]
|
|
cmp [0x3000], ebx
|
|
jz .noswitch
|
|
mov [dma_task_switched], 1
|
|
mov edi, [dma_slot_ptr]
|
|
mov eax, [0x3000]
|
|
mov [dma_process], eax
|
|
mov eax, [0x3010]
|
|
mov [dma_slot_ptr], eax
|
|
mov [0x3000], ebx
|
|
mov [0x3010], edi
|
|
mov byte [0xFFFF], 1
|
|
call do_change_task
|
|
.noswitch:
|
|
popad
|
|
popfd
|
|
ret
|
|
|
|
align 4
|
|
hd_read_dma:
|
|
push eax
|
|
push edx
|
|
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, 0x284000
|
|
push ecx esi edi
|
|
mov esi, eax
|
|
shl edi, 9
|
|
add edi, 0x610000
|
|
mov ecx, 512/4
|
|
cld
|
|
rep movsd
|
|
pop edi esi ecx
|
|
pop edx
|
|
pop eax
|
|
ret
|
|
.notread:
|
|
mov eax, IDE_descriptor_table
|
|
mov dword [eax], 0x284000
|
|
mov word [eax+4], 0x2000
|
|
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
|
|
call wait_for_hd_idle
|
|
cmp [hd_error], 0
|
|
jnz hd_read_error
|
|
call disable_ide_int
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al
|
|
inc edx
|
|
mov eax, 10h
|
|
out dx, al
|
|
inc edx
|
|
mov eax, [esp+4]
|
|
out dx, al
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al
|
|
shr eax, 8
|
|
inc edx
|
|
and al, 0xF
|
|
add al, byte [hdid]
|
|
add al, 11100000b
|
|
out dx, al
|
|
inc edx
|
|
mov al, 0xC8
|
|
out dx, al
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
cmp [hdbase], 0x1F0
|
|
jz @f
|
|
add dx, 8
|
|
@@:
|
|
mov al, 9
|
|
out dx, al
|
|
mov eax, [0x3000]
|
|
mov [dma_process], eax
|
|
mov eax, [0x3010]
|
|
mov [dma_slot_ptr], eax
|
|
cmp [hdbase], 0x1F0
|
|
jnz .ide1
|
|
mov [irq14_func], hdd_irq14
|
|
jmp @f
|
|
.ide1:
|
|
mov [irq15_func], hdd_irq15
|
|
@@:
|
|
call enable_ide_int
|
|
cmp [hdbase], 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
|
|
pop edx
|
|
pop eax
|
|
mov [dma_cur_sector], eax
|
|
jmp hd_read_dma
|
|
|
|
align 4
|
|
write_cache_chain:
|
|
push esi
|
|
mov eax, IDE_descriptor_table
|
|
mov edx, [cache_chain_pos]
|
|
shl edx, 9
|
|
add edx, 0x610000
|
|
mov [eax], edx
|
|
movzx edx, [cache_chain_size]
|
|
shl edx, 9
|
|
mov [eax+4], dx
|
|
jmp do_write_dma
|
|
write_cache_sector:
|
|
push esi
|
|
mov eax, IDE_descriptor_table
|
|
mov edx, edi
|
|
shl edx, 9
|
|
add edx, 0x610000
|
|
mov [eax], edx
|
|
mov word [eax+4], 0x200
|
|
do_write_dma:
|
|
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
|
|
call wait_for_hd_idle
|
|
cmp [hd_error], 0
|
|
jnz hd_write_error_dma
|
|
call disable_ide_int
|
|
xor eax, eax
|
|
mov edx, [hdbase]
|
|
inc edx
|
|
out dx, al
|
|
inc edx
|
|
mov al, [cache_chain_size]
|
|
out dx, al
|
|
inc edx
|
|
mov esi, [cache_chain_ptr]
|
|
mov eax, [esi]
|
|
out dx, al
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al
|
|
shr eax, 8
|
|
inc edx
|
|
out dx, al
|
|
shr eax, 8
|
|
inc edx
|
|
and al, 0xF
|
|
add al, byte [hdid]
|
|
add al, 11100000b
|
|
out dx, al
|
|
inc edx
|
|
mov al, 0xCA
|
|
out dx, al
|
|
mov dx, [IDEContrRegsBaseAddr]
|
|
cmp [hdbase], 0x1F0
|
|
jz @f
|
|
add dx, 8
|
|
@@:
|
|
mov al, 1
|
|
out dx, al
|
|
mov eax, [0x3000]
|
|
mov [dma_process], eax
|
|
mov eax, [0x3010]
|
|
mov [dma_slot_ptr], eax
|
|
cmp [hdbase], 0x1F0
|
|
jnz .ide1
|
|
mov [irq14_func], hdd_irq14
|
|
jmp @f
|
|
.ide1:
|
|
mov [irq15_func], hdd_irq15
|
|
@@:
|
|
call enable_ide_int
|
|
mov [dma_cur_sector], not 0x40
|
|
cmp [hdbase], 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 ?
|
|
endg
|
|
; \end{Mario79}
|