dp8393x: remove onboard PROM containing MAC address and checksum

According to the datasheet the dp8393x chipset does not contain any NVRAM capable
of storing a MAC address or checksum. Now that both the MIPS jazz and m68k q800
boards generate the PROM region and checksum themselves, remove the generated
PROM from the dp8393x device itself.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Finn Thain <fthain@linux-m68k.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210625065401.30170-6-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

hw/net/dp8393x.c

@@ -30,8 +30,6 @@
 #include "qom/object.h"
 #include "trace.h"
 
-#define SONIC_PROM_SIZE 0x1000
-
 static const char *reg_names[] = {
     "CR", "DCR", "RCR", "TCR", "IMR", "ISR", "UTDA", "CTDA",
     "TPS", "TFC", "TSA0", "TSA1", "TFS", "URDA", "CRDA", "CRBA0",
@@ -157,7 +155,6 @@ struct dp8393xState {
     NICConf conf;
     NICState *nic;
     MemoryRegion mmio;
-    MemoryRegion prom;
 
     /* Registers */
     uint8_t cam[16][6];
@@ -966,16 +963,12 @@ static void dp8393x_instance_init(Object *obj)
     dp8393xState *s = DP8393X(obj);
 
     sysbus_init_mmio(sbd, &s->mmio);
-    sysbus_init_mmio(sbd, &s->prom);
     sysbus_init_irq(sbd, &s->irq);
 }
 
 static void dp8393x_realize(DeviceState *dev, Error **errp)
 {
     dp8393xState *s = DP8393X(dev);
-    int i, checksum;
-    uint8_t *prom;
-    Error *local_err = NULL;
 
     address_space_init(&s->as, s->dma_mr, "dp8393x");
     memory_region_init_io(&s->mmio, OBJECT(dev), &dp8393x_ops, s,
@@ -986,23 +979,6 @@ static void dp8393x_realize(DeviceState *dev, Error **errp)
     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 
     s->watchdog = timer_new_ns(QEMU_CLOCK_VIRTUAL, dp8393x_watchdog, s);
-
-    memory_region_init_rom(&s->prom, OBJECT(dev), "dp8393x-prom",
-                           SONIC_PROM_SIZE, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-    prom = memory_region_get_ram_ptr(&s->prom);
-    checksum = 0;
-    for (i = 0; i < 6; i++) {
-        prom[i] = s->conf.macaddr.a[i];
-        checksum += prom[i];
-        if (checksum > 0xff) {
-            checksum = (checksum + 1) & 0xff;
-        }
-    }
-    prom[7] = 0xff - checksum;
 }
 
 static const VMStateDescription vmstate_dp8393x = {