97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/* Copyright holders: SA1988, Tenshi
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see COPYING for more details
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*/
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/*SCSI layer emulation*/
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#include <stdlib.h>
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#include <string.h>
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#include "86box.h"
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#include "ibm.h"
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#include "device.h"
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#include "cdrom.h"
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#include "scsi.h"
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#include "timer.h"
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int SCSICallback[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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uint8_t scsi_cdrom_id = 3; /*common setting*/
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//Get the transfer length of the command
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void SCSIGetLength(uint8_t id, int *datalen)
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{
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*datalen = SCSIDevices[id].CmdBufferLength;
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}
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//Execute SCSI command
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void SCSIExecCommand(uint8_t id, uint8_t *buffer, uint8_t *cdb)
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{
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SCSICDROM_Command(id, buffer, cdb);
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}
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//Read pending data from the resulting SCSI command
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void SCSIReadData(uint8_t id, uint8_t *cdb, uint8_t *data, int datalen)
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{
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SCSICDROM_ReadData(id, cdb, data, datalen);
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}
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/////
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void SCSIDMAResetPosition(uint8_t Id)
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{
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//Reset position in memory after reaching its limit
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SCSIDevices[Id].pos = 0;
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}
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//Read data from buffer with given position in buffer memory
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void SCSIRead(uint8_t Id, uint8_t *dstbuf, uint8_t *srcbuf, uint32_t len_size)
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{
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if (!len_size) //If there's no data, don't try to do anything.
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return;
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int c;
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for (c = 0; c <= len_size; c++) //Count as many bytes as the length of the buffer is requested
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{
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memcpy(dstbuf, srcbuf + SCSIDevices[Id].pos, len_size);
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SCSIDevices[Id].pos = c;
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//pclog("SCSI Read: position at %i\n", SCSIDevices[Id].pos);
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}
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}
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//Write data to buffer with given position in buffer memory
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void SCSIWrite(uint8_t Id, uint8_t *srcbuf, uint8_t *dstbuf, uint32_t len_size)
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{
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int c;
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for (c = 0; c <= len_size; c++) //Count as many bytes as the length of the buffer is requested
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{
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memcpy(srcbuf + SCSIDevices[Id].pos, dstbuf, len_size);
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SCSIDevices[Id].pos = c;
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//pclog("SCSI Write: position at %i\n", SCSIDevices[Id].pos);
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}
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}
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/////
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//Initialization function for the SCSI layer
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void SCSIReset(uint8_t Id)
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{
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page_flags[GPMODE_CDROM_AUDIO_PAGE] &= 0xFD; /* Clear changed flag for CDROM AUDIO mode page. */
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memset(mode_pages_in[GPMODE_CDROM_AUDIO_PAGE], 0, 256); /* Clear the page itself. */
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SCSICallback[Id]=0;
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if (cdrom_enabled && scsi_cdrom_enabled)
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{
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SCSIDevices[Id].LunType = SCSI_CDROM;
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}
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else
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{
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SCSIDevices[Id].LunType = SCSI_NONE;
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}
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page_flags[GPMODE_CDROM_AUDIO_PAGE] &= ~PAGE_CHANGED;
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SCSISense.UnitAttention = 0;
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}
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