Macintosh-HW/MacIIROMDiskDriver
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Cleaned up

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This commit is contained in:
Zane Kaminski 2020-06-24 13:18:47 -04:00
parent f15ccd316c
commit 889973dd03
1 changed files with 38 additions and 27 deletions
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65
rdisk.c
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@ -47,7 +47,8 @@ typedef struct RDiskStorage_s {
#pragma parameter __D0 RDiskOpen(__A0, __A1)
OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
DrvQElPtr dq;
int drvnum = 1;
DrvSts2 *status;
int drvNum;
RDiskStorage_t *c;
// Do nothing if already opened
@ -58,8 +59,9 @@ OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
StripAddress(&GWROMDisk);
// Figure out first available drive number
drvNum = 1;
for (dq = (DrvQElPtr)(GetDrvQHdr())->qHead; dq; dq = (DrvQElPtr)dq->qLink) {
if (dq->dQDrive >= drvnum) { drvnum = dq->dQDrive + 1; }
if (dq->dQDrive >= drvNum) { drvNum = dq->dQDrive + 1; }
}
// Allocate storage struct
@ -70,30 +72,35 @@ OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
HLock(d->dCtlStorage);
c = *(RDiskStorage_t**)d->dCtlStorage;
// Set drive status
c->drvsts.writeProt = -1;
c->drvsts.diskInPlace = 0x08;
c->drvsts.dQDrive = drvnum;
c->drvsts.dQRefNum = d->dCtlRefNum;
c->drvsts.driveSize = (RDiskSize >> 9) & 0xFFFF;
c->drvsts.driveS1 = ((RDiskSize >> 9) & 0xFFFF0000) >> 16;
// Initialize storage struct fields
c->init_done = 0;
c->ramdisk = NULL;
c->ramdisk_alloc = NULL;
c->ramdisk_valid = 0;
//FIXME: Set driver flags?
// Set drive status
status->writeProt = 0xF0;
status->diskInPlace = 0x08;
status->dQDrive = drvNum;
status->dQRefNum = d->dCtlRefNum;
status->driveSize = (RDiskSize / 512) & 0xFFFF;
status->driveS1 = ((RDiskSize / 512) & 0xFFFF0000) >> 16;
// Set driver flags?
/* d->dCtlFlags |= dReadEnableMask | dWritEnableMask |
dCtlEnableMask | dStatEnableMask |
dNeedLockMask; */
dNeedLockMask; // 0x4F */
// Add drive to drive queue and return
RDAddDrive(status->dQRefNum, drvNum, (DrvQElPtr)&status->qLink);
return noErr;
}
static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
char startup, ram;
OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
char startup = 0, ram = 0;
// Return if initialized. Otherwise mark init done
if (c->init_done) { return noErr; }
else { c->init_done = 1; }
// Mark init done
c->init_done = 1;
// Read PRAM
RDReadXPRAM(1, 4, &startup);
@ -103,10 +110,10 @@ static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
if (startup || RDIsRPressed()) { // If ROM disk boot set in PRAM or R pressed,
// Set ROM disk attributes
c->drvsts.writeProt = -1; // Set write protected
// Clear RAM disk structure fields (even though we used NewHandleSysClear)
// Clear disk fields (even though we used NewHandleSysClear)
c->ramdisk = NULL;
c->ramdisk_alloc = NULL;
c-> ramdisk_valid = 0;
c->ramdisk_valid = 0;
// If RAM disk set in PRAM or A pressed, enable RAM disk
if (ram || RDISAPressed()) {
unsigned long minBufPtr, newBufPtr;
@ -132,6 +139,7 @@ static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
// Remove our driver from the drive queue
DrvQElPtr dq;
QHdrPtr QHead = (QHdrPtr)0x308;
// Loop through entire drive queue, searching for our device or stopping at the end.
dq = (DrvQElPtr)QHead->qHead;
while((dq != (DrvQElPtr)(QHead->qTail)) && (dq->dQRefNum != d->dCtlRefNum)) {
@ -167,8 +175,8 @@ OSErr RDiskPrime(IOParamPtr p, DCtlPtr d) {
// Initialize if this is the first prime call
if (!c->init_done) {
OSErr ret = RDiskInit(p, d, c);
if (ret != noErr) { return ret; } // Return error if init failed
}
if (ret != noErr) { return ret; }
}
// Get pointer to RAM or ROM disk buffer
disk = c->ramdisk && c->ramdisk_valid ? c->ramdisk : RDiskBuf;
@ -178,20 +186,24 @@ OSErr RDiskPrime(IOParamPtr p, DCtlPtr d) {
case fsAtMark: offset = d->dCtlPosition; break;
case fsFromStart:
offset = p->ioPosOffset;
//FIXME: if (offset < 0) { fail }
//if (offset < 0) { return posErr; }
break;
case fsFromMark: offset= d->dCtlPosition + p->ioPosOffset; break;
case fsFromMark: offset = d->dCtlPosition + p->ioPosOffset; break;
default: offset = 0; break; //FIXME: Error if unsupported ioPosMode?
}
// FIXME: if (offset >= RDiskSize) { fail }
disk += offset;
// Bounds checking
/*if (offset >= RDiskSize || p->ioReqCount >= RDiskSize ||
offset + p->ioReqCount >= RDiskSize ||
disk + offset < disk) { return posErr; }*/
// Service read or write request
cmd = p->ioTrap & 0x00FF;
if (cmd == aRdCmd) { // Read
// Return immediately if verify operation requested
//FIXME: follow either old (verify) or new (read uncached) convention
if (p->ioPosMode & rdVerifyMask) { return noErr; }
if (p->ioPosMode & rdVerifyMask) {
return noErr;
}
// Read from disk into buffer.
if (*MMU32bit) { BlockMove(disk, (char*)p->ioBuffer, p->ioReqCount); }
else { // 24-bit addressing
@ -219,7 +231,7 @@ OSErr RDiskPrime(IOParamPtr p, DCtlPtr d) {
//FIXME: Should we fail if cmd isn't read or write?
}
static OSErr RDiskAccRun(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
OSErr RDiskAccRun(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
// Disable accRun
d->dCtlDelay = 0;
d->dCtlFlags &= ~dNeedTimeMask;
@ -286,7 +298,6 @@ OSErr RDiskStatus(IOParamPtr p, DCtlPtr d) {
return noErr;
default: return statusErr;
}
return noErr;
}
#pragma parameter __D0 RDiskClose(__A0, __A1)