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https://github.com/xemu-project/xemu.git
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floppy fixes (initial patch by Mike Nordell)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1101 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
a4c4785b93
commit
890fa6bebb
55
hw/fdc.c
55
hw/fdc.c
@ -1,5 +1,5 @@
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/*
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* QEMU Floppy disk emulator
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* QEMU Floppy disk emulator (Intel 82078)
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*
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* Copyright (c) 2003 Jocelyn Mayer
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*
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@ -382,6 +382,7 @@ struct fdctrl_t {
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uint8_t data_state;
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uint8_t data_dir;
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uint8_t int_status;
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uint8_t eot; /* last wanted sector */
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/* States kept only to be returned back */
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/* Timers state */
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uint8_t timer0;
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@ -762,7 +763,7 @@ static void fdctrl_unimplemented (fdctrl_t *fdctrl)
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fdrive_t *cur_drv;
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cur_drv = get_cur_drv(fdctrl);
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fdctrl->fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl->cur_drv;
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fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
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fdctrl->fifo[1] = 0x00;
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fdctrl->fifo[2] = 0x00;
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fdctrl_set_fifo(fdctrl, 3, 1);
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@ -782,8 +783,8 @@ static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
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cur_drv = get_cur_drv(fdctrl);
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FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
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status0, status1, status2,
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status0 | (cur_drv->head << 1) | fdctrl->cur_drv);
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fdctrl->fifo[0] = status0 | (cur_drv->head << 1) | fdctrl->cur_drv;
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status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
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fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
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fdctrl->fifo[1] = status1;
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fdctrl->fifo[2] = status2;
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fdctrl->fifo[3] = cur_drv->track;
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@ -810,7 +811,7 @@ static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
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kt = fdctrl->fifo[2];
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kh = fdctrl->fifo[3];
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ks = fdctrl->fifo[4];
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FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
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FLOPPY_DPRINTF("Start tranfer at %d %d %02x %02x (%d)\n",
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fdctrl->cur_drv, kh, kt, ks,
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_fd_sector(kh, kt, ks, cur_drv->last_sect));
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did_seek = 0;
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@ -864,6 +865,7 @@ static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
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tmp += cur_drv->last_sect;
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fdctrl->data_len *= tmp;
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}
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fdctrl->eot = fdctrl->fifo[6];
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if (fdctrl->dma_en) {
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int dma_mode;
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/* DMA transfer are enabled. Check if DMA channel is well programmed */
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@ -924,14 +926,14 @@ static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
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status2 = 0x04;
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if (size > fdctrl->data_len)
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size = fdctrl->data_len;
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if (cur_drv->bs == NULL) {
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if (cur_drv->bs == NULL) {
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if (fdctrl->data_dir == FD_DIR_WRITE)
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fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
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else
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fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
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len = 0;
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goto transfer_error;
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}
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goto transfer_error;
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}
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rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
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for (start_pos = fdctrl->data_pos; fdctrl->data_pos < size;) {
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len = size - fdctrl->data_pos;
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@ -952,7 +954,7 @@ static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
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/* Sure, image size is too small... */
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memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
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}
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}
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}
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switch (fdctrl->data_dir) {
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case FD_DIR_READ:
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/* READ commands */
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@ -968,7 +970,7 @@ static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
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FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
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fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
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goto transfer_error;
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}
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}
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break;
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default:
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/* SCAN commands */
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@ -994,30 +996,34 @@ static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
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rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
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if (rel_pos == 0) {
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/* Seek to next sector */
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cur_drv->sect++;
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FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
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cur_drv->head, cur_drv->track, cur_drv->sect,
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fd_sector(cur_drv),
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fdctrl->data_pos - size);
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if (cur_drv->sect > cur_drv->last_sect) {
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/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
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error in fact */
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if (cur_drv->sect >= cur_drv->last_sect ||
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cur_drv->sect == fdctrl->eot) {
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cur_drv->sect = 1;
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if (FD_MULTI_TRACK(fdctrl->data_state)) {
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if (cur_drv->head == 0 &&
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(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
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cur_drv->head = 1;
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} else {
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cur_drv->head = 0;
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cur_drv->head = 1;
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} else {
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cur_drv->head = 0;
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cur_drv->track++;
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if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
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break;
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}
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} else {
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cur_drv->track++;
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break;
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}
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} else {
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cur_drv->track++;
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break;
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}
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FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
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cur_drv->head, cur_drv->track,
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cur_drv->sect, fd_sector(cur_drv));
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} else {
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cur_drv->sect++;
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}
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}
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}
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@ -1033,7 +1039,7 @@ end_transfer:
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status0 |= 0x20;
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fdctrl->data_len -= len;
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// if (fdctrl->data_len == 0)
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fdctrl_stop_transfer(fdctrl, status0, status1, status2);
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fdctrl_stop_transfer(fdctrl, status0, status1, status2);
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transfer_error:
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return len;
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@ -1066,7 +1072,7 @@ static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
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retval = fdctrl->fifo[pos];
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if (++fdctrl->data_pos == fdctrl->data_len) {
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fdctrl->data_pos = 0;
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/* Switch from transfert mode to status mode
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/* Switch from transfer mode to status mode
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* then from status mode to command mode
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*/
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if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
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@ -1170,7 +1176,7 @@ static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
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bdrv_write(cur_drv->bs, fd_sector(cur_drv),
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fdctrl->fifo, FD_SECTOR_LEN);
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}
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/* Switch from transfert mode to status mode
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/* Switch from transfer mode to status mode
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* then from status mode to command mode
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*/
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if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
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@ -1510,7 +1516,9 @@ enqueue:
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/* 1 Byte status back */
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fdctrl->fifo[0] = (cur_drv->ro << 6) |
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(cur_drv->track == 0 ? 0x10 : 0x00) |
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fdctrl->cur_drv;
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(cur_drv->head << 2) |
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fdctrl->cur_drv |
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0x28;
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fdctrl_set_fifo(fdctrl, 1, 0);
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break;
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case 0x07:
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@ -1581,6 +1589,7 @@ enqueue:
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/* READ_ID */
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FLOPPY_DPRINTF("treat READ_ID command\n");
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/* XXX: should set main status register to busy */
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cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
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qemu_mod_timer(fdctrl->result_timer,
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qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
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break;
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