diff options
Diffstat (limited to 'hw/fdc.c')
| -rw-r--r-- | hw/fdc.c | 54 |
1 files changed, 24 insertions, 30 deletions
@@ -26,7 +26,6 @@ #include <string.h> #include <inttypes.h> -#include "cpu.h" #include "vl.h" /********************************************************/ @@ -218,8 +217,7 @@ static void fd_reset (fdrive_t *drv) static void fdctrl_reset (int do_irq); static void fdctrl_reset_fifo (void); -static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq); -static int fdctrl_misc_handler (int duknwo); +static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size); static void fdctrl_raise_irq (uint8_t status); static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg); @@ -310,8 +308,7 @@ void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base, fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */ if (fdctrl.dma_chann != -1) { fdctrl.dma_en = 1; - DMA_register_channel(dma_chann, &fdctrl_transfer_handler, - &fdctrl_misc_handler); + DMA_register_channel(dma_chann, fdctrl_transfer_handler, &fdctrl); } else { fdctrl.dma_en = 0; } @@ -721,6 +718,7 @@ static void fdctrl_start_transfer (int direction) * recall us... */ DMA_hold_DREQ(fdctrl.dma_chann); + DMA_schedule(fdctrl.dma_chann); return; } } @@ -749,12 +747,13 @@ static void fdctrl_start_transfer_del (int direction) } /* handlers for DMA transfers */ -static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq) +/* XXX: the partial transfer logic seems to be broken */ +static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size) { fdrive_t *cur_drv, *drv0, *drv1; - void *orig; int len; uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; + uint8_t tmpbuf[FD_SECTOR_LEN]; fdctrl_reset_irq(); if (!(fdctrl.state & FD_CTRL_BUSY)) { @@ -764,8 +763,6 @@ static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq) drv0 = &fdctrl.drives[fdctrl.bootsel]; drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; -// *irq = fdctrl.irq_lvl; - *irq = -1; if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL || fdctrl.data_dir == FD_DIR_SCANH) status2 = 0x04; @@ -779,35 +776,34 @@ static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq) fdctrl.data_len, fdctrl.cur_drv, cur_drv->head, cur_drv->track, cur_drv->sect, fd_sector(cur_drv), fd_sector(cur_drv) * 512); - if (len < FD_SECTOR_LEN) { - memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, - FD_SECTOR_LEN - len - 1); - orig = fdctrl.fifo; - } else { - orig = (void *)(addr + fdctrl.data_pos); - } if (fdctrl.data_dir != FD_DIR_WRITE) { /* READ & SCAN commands */ if (cur_drv->bs == NULL) { fdctrl_stop_transfer(0x40, 0x00, 0x00); goto transfer_error; } - - if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) { + if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) { FLOPPY_DPRINTF("Floppy: error getting sector %d\n", fd_sector(cur_drv)); /* Sure, image size is too small... */ - memset((void *)(addr + fdctrl.data_pos), 0, FD_SECTOR_LEN); + memset(tmpbuf, 0, FD_SECTOR_LEN); } if (fdctrl.data_dir == FD_DIR_READ) { + cpu_physical_memory_write(addr + fdctrl.data_pos, + tmpbuf, len); if (len < FD_SECTOR_LEN) { - memcpy((void *)(addr + fdctrl.data_pos), - fdctrl.fifo, FD_SECTOR_LEN); + memcpy(&fdctrl.fifo[0], tmpbuf + len, FD_SECTOR_LEN - len); + memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, len); } } else { int ret; - ret = memcmp((void *)(addr + fdctrl.data_pos), - fdctrl.fifo, FD_SECTOR_LEN); + /* XXX: what to do if not enough data ? */ + cpu_physical_memory_read(addr + fdctrl.data_pos, + fdctrl.fifo, len); + if (len < FD_SECTOR_LEN) { + memset(&fdctrl.fifo[len], 0, FD_SECTOR_LEN - len); + } + ret = memcmp(tmpbuf, fdctrl.fifo, FD_SECTOR_LEN); if (ret == 0) { status2 = 0x08; goto end_transfer; @@ -820,8 +816,12 @@ static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq) } } else { /* WRITE commands */ + cpu_physical_memory_read(addr + fdctrl.data_pos, tmpbuf, len); + if (len < FD_SECTOR_LEN) { + memset(tmpbuf + len, 0, FD_SECTOR_LEN - len); + } if (cur_drv->bs == NULL || - bdrv_write(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) { + bdrv_write(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) { FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv)); fdctrl_stop_transfer(0x60, 0x00, 0x00); goto transfer_error; @@ -871,12 +871,6 @@ transfer_error: return fdctrl.data_pos; } -/* Unused... */ -static int fdctrl_misc_handler (int duknwo) -{ - return -1; -} - /* Data register : 0x05 */ static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg) { |