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ata: more read/write optimization

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This commit is contained in:
Matt Harlum 2025-01-07 01:08:30 +00:00
parent af771f9534
commit a140763cd1
1 changed files with 8 additions and 4 deletions
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12
ata.c
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@ -545,6 +545,8 @@ BYTE ata_read(void *buffer, ULONG lba, ULONG count, struct IDEUnit *unit) {
ULONG txn_count; // Amount of sectors to transfer in the current READ/WRITE command
UBYTE command;
UBYTE multipleCount = unit->multipleCount;
volatile void *dataRegister = unit->drive.data;
if (unit->lba48) {
command = ATA_CMD_READ_MULTIPLE_EXT;
@ -601,8 +603,8 @@ BYTE ata_read(void *buffer, ULONG lba, ULONG count, struct IDEUnit *unit) {
}
/* Transfer up to (multiple_count) sectors before polling DRQ again */
for (int i = 0; i < unit->multipleCount && txn_count; i++) {
ata_xfer((void *)unit->drive.data,buffer);
for (int i = 0; i < multipleCount && txn_count; i++) {
ata_xfer((void *)dataRegister,buffer);
txn_count--;
buffer += 512;
}
@ -632,6 +634,8 @@ BYTE ata_write(void *buffer, ULONG lba, ULONG count, struct IDEUnit *unit) {
ULONG txn_count; // Amount of sectors to transfer in the current READ/WRITE command
UBYTE command;
UBYTE multipleCount = unit->multipleCount;
volatile void *dataRegister = unit->drive.data;
if (unit->lba48) {
command = ATA_CMD_WRITE_MULTIPLE_EXT;
@ -688,8 +692,8 @@ BYTE ata_write(void *buffer, ULONG lba, ULONG count, struct IDEUnit *unit) {
}
/* Transfer up to (multiple_count) sectors before polling DRQ again */
for (int i = 0; i < unit->multipleCount && txn_count; i++) {
ata_xfer(buffer,(void *)unit->drive.data);
for (int i = 0; i < multipleCount && txn_count; i++) {
ata_xfer(buffer,(void *)dataRegister);
txn_count--;
buffer += 512;
}