diff options
| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2021-03-04 22:10:51 +0000 |
|---|---|---|
| committer | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2021-03-07 10:39:05 +0000 |
| commit | cf1b8286007a5a12f7d42d484b8ac0e031038e2e (patch) | |
| tree | 1aa011bb7227ce46ffc27fb86ca066a82f1ab93a /hw/scsi/esp.c | |
| parent | 43d02df31b8679dcc69c4ffcdb6cc658e1d348f7 (diff) | |
esp: add 4 byte PDMA read and write transfers
The MacOS toolbox ROM performs 4 byte reads/writes when transferring data to
and from the target. Since the SCSI bus is 16-bits wide, use the memory API
to split a 4 byte access into 2 x 2 byte accesses.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210304221103.6369-31-mark.cave-ayland@ilande.co.uk>
Diffstat (limited to 'hw/scsi/esp.c')
| -rw-r--r-- | hw/scsi/esp.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 79b84e31d3..2dded90be6 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -1002,7 +1002,9 @@ static const MemoryRegionOps sysbus_esp_pdma_ops = { .write = sysbus_esp_pdma_write, .endianness = DEVICE_NATIVE_ENDIAN, .valid.min_access_size = 1, - .valid.max_access_size = 2, + .valid.max_access_size = 4, + .impl.min_access_size = 1, + .impl.max_access_size = 2, }; static const struct SCSIBusInfo esp_scsi_info = { @@ -1049,7 +1051,7 @@ static void sysbus_esp_realize(DeviceState *dev, Error **errp) sysbus, "esp-regs", ESP_REGS << sysbus->it_shift); sysbus_init_mmio(sbd, &sysbus->iomem); memory_region_init_io(&sysbus->pdma, OBJECT(sysbus), &sysbus_esp_pdma_ops, - sysbus, "esp-pdma", 2); + sysbus, "esp-pdma", 4); sysbus_init_mmio(sbd, &sysbus->pdma); qdev_init_gpio_in(dev, sysbus_esp_gpio_demux, 2); |