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minimig_hdd: refactoring.

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This commit is contained in:
sorgelig
2018-05-06 01:13:16 +08:00
parent a21c03ec19
commit c4a03b7a53
2 changed files with 47 additions and 68 deletions
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60
minimig_hdd.cpp
View File

@@ -19,7 +19,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
// 2009-11-22 - read/write multiple implemented
#include <stdio.h>
#include <string.h>
#include "hardware.h"
@@ -31,16 +30,52 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "debug.h"
#include "fpga_io.h"
#define CMD_IDECMD 0x04
#define CMD_IDEDAT 0x08
#define CMD_IDE_REGS_RD 0x80
#define CMD_IDE_REGS_WR 0x90
#define CMD_IDE_DATA_WR 0xA0
#define CMD_IDE_DATA_RD 0xB0
#define CMD_IDE_STATUS_WR 0xF0
#define IDE_STATUS_END 0x80
#define IDE_STATUS_IRQ 0x10
#define IDE_STATUS_RDY 0x08
#define IDE_STATUS_REQ 0x04
#define IDE_STATUS_ERR 0x01
#define ACMD_RECALIBRATE 0x10
#define ACMD_DIAGNOSTIC 0x90
#define ACMD_IDENTIFY_DEVICE 0xEC
#define ACMD_INITIALIZE_DEVICE_PARAMETERS 0x91
#define ACMD_READ_SECTORS 0x20
#define ACMD_WRITE_SECTORS 0x30
#define ACMD_READ_MULTIPLE 0xC4
#define ACMD_WRITE_MULTIPLE 0xC5
#define ACMD_SET_MULTIPLE_MODE 0xC6
#define SWAP(a) ((((a)&0x000000ff)<<24)|(((a)&0x0000ff00)<<8)|(((a)&0x00ff0000)>>8)|(((a)&0xff000000)>>24))
#define SWAPW(a) ((((a)<<8)&0xff00)|(((a)>>8)&0x00ff))
// hardfile structure
typedef struct
{
int type; // are we using a file, the entire SD card or a partition on the SD card?
fileTYPE file;
unsigned short cylinders;
unsigned short heads;
unsigned short sectors;
unsigned short sectors_per_block;
unsigned short partition; // partition no.
long offset; // if a partition, the lba offset of the partition. Can be negative if we've synthesized an RDB.
} hdfTYPE;
hdfTYPE hdf[2] = { 0 };
static uint8_t sector_buffer[512];
unsigned char GetDiskStatus(void)
static unsigned char GetDiskStatus(void)
{
unsigned char status;
@@ -157,7 +192,7 @@ static void FakeRDB(int unit, int block)
// IdentifiyDevice()
// builds Identify Device struct
void IdentifyDevice(unsigned short *pBuffer, unsigned char unit)
static void IdentifyDevice(unsigned short *pBuffer, unsigned char unit)
{
char *p, i, x;
unsigned long total_sectors = hdf[unit].cylinders * hdf[unit].heads * hdf[unit].sectors;
@@ -201,14 +236,14 @@ void IdentifyDevice(unsigned short *pBuffer, unsigned char unit)
// chs2lba()
unsigned long chs2lba(unsigned short cylinder, unsigned char head, unsigned short sector, unsigned char unit)
static unsigned long chs2lba(unsigned short cylinder, unsigned char head, unsigned short sector, unsigned char unit)
{
return(cylinder * hdf[unit].heads + head) * hdf[unit].sectors + sector - 1;
}
// WriteTaskFile()
void WriteTaskFile(unsigned char error, unsigned char sector_count, unsigned char sector_number, unsigned char cylinder_low, unsigned char cylinder_high, unsigned char drive_head)
static void WriteTaskFile(unsigned char error, unsigned char sector_count, unsigned char sector_number, unsigned char cylinder_low, unsigned char cylinder_high, unsigned char drive_head)
{
EnableFpga();
@@ -229,7 +264,7 @@ void WriteTaskFile(unsigned char error, unsigned char sector_count, unsigned cha
// WriteStatus()
void WriteStatus(unsigned char status)
static void WriteStatus(unsigned char status)
{
EnableFpga();
spi_w((CMD_IDE_STATUS_WR<<8) | status);
@@ -299,6 +334,11 @@ static void ATA_SetMultipleMode(unsigned char* tfr, unsigned char unit)
WriteStatus(IDE_STATUS_END | IDE_STATUS_IRQ);
}
// HardFileSeek()
static unsigned char HardFileSeek(hdfTYPE *pHDF, unsigned long lba)
{
return FileSeekLBA(&pHDF->file, lba);
}
// ATA_ReadSectors()
static void ATA_ReadSectors(unsigned char* tfr, unsigned short sector, unsigned short cylinder, unsigned char head, unsigned char unit, unsigned short sector_count)
@@ -635,7 +675,7 @@ void HandleHDD(unsigned char c1, unsigned char c2)
// GetHardfileGeometry()
// this function comes from WinUAE, should return the same CHS as WinUAE
void GetHardfileGeometry(hdfTYPE *pHDF)
static void GetHardfileGeometry(hdfTYPE *pHDF)
{
unsigned long total = 0;
unsigned long i, head, cyl, spt;
@@ -679,12 +719,6 @@ void GetHardfileGeometry(hdfTYPE *pHDF)
}
// HardFileSeek()
unsigned char HardFileSeek(hdfTYPE *pHDF, unsigned long lba)
{
return FileSeekLBA(&pHDF->file, lba);
}
// OpenHardfile()
unsigned char OpenHardfile(unsigned char unit)
{

55
minimig_hdd.h
View File

@@ -1,36 +1,8 @@
// hdd.h
#ifndef __MINIMIG_HDD_H__
#define __MINIMIG_HDD_H__
// defines
#define CMD_IDECMD 0x04
#define CMD_IDEDAT 0x08
#define CMD_IDE_REGS_RD 0x80
#define CMD_IDE_REGS_WR 0x90
#define CMD_IDE_DATA_WR 0xA0
#define CMD_IDE_DATA_RD 0xB0
#define CMD_IDE_STATUS_WR 0xF0
#define IDE_STATUS_END 0x80
#define IDE_STATUS_IRQ 0x10
#define IDE_STATUS_RDY 0x08
#define IDE_STATUS_REQ 0x04
#define IDE_STATUS_ERR 0x01
#define ACMD_RECALIBRATE 0x10
#define ACMD_DIAGNOSTIC 0x90
#define ACMD_IDENTIFY_DEVICE 0xEC
#define ACMD_INITIALIZE_DEVICE_PARAMETERS 0x91
#define ACMD_READ_SECTORS 0x20
#define ACMD_WRITE_SECTORS 0x30
#define ACMD_READ_MULTIPLE 0xC4
#define ACMD_WRITE_MULTIPLE 0xC5
#define ACMD_SET_MULTIPLE_MODE 0xC6
#define HDF_DISABLED 0
#define HDF_FILE 1
#define HDF_TYPEMASK 15
@@ -41,37 +13,10 @@
#define HDF_FILETYPE_RDB 2
#define HDF_FILETYPE_DOS 3
// types
typedef struct
{
int type; // are we using a file, the entire SD card or a partition on the SD card?
fileTYPE file;
unsigned short cylinders;
unsigned short heads;
unsigned short sectors;
unsigned short sectors_per_block;
unsigned short partition; // partition no.
long offset; // if a partition, the lba offset of the partition. Can be negative if we've synthesized an RDB.
} hdfTYPE;
// variables
extern char debugmsg[40];
extern char debugmsg2[40];
extern hdfTYPE hdf[2];
// functions
void IdentifyDevice(unsigned short *pBuffer, unsigned char unit);
unsigned long chs2lba(unsigned short cylinder, unsigned char head, unsigned short sector, unsigned char unit);
void WriteTaskFile(unsigned char error, unsigned char sector_count, unsigned char sector_number, unsigned char cylinder_low, unsigned char cylinder_high, unsigned char drive_head);
void WriteStatus(unsigned char status);
void HandleHDD(unsigned char c1, unsigned char c2);
void GetHardfileGeometry(hdfTYPE *hdf);
unsigned char HardFileSeek(hdfTYPE *hdf, unsigned long lba);
unsigned char OpenHardfile(unsigned char unit);
unsigned char GetHDFFileType(char *filename);
#endif // __HDD_H__