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net/cadence_gem: Implement SAR (de)activation 

The Specific address registers can be enabled or disabled by software.
QEMU was assuming they were always enabled. Implement the
disable/enable feature. SARs are disabled by writing to the lower half
register. They are re-enabled by then writing the upper half.

Reported-by: Deepika Dhamija <deepika@xilinx.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 49efd1f7450af8f980b967d3054245bae137866c.1386136219.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite 2013-12-03 21:58:34 -08:00 committed by Peter Maydell
parent a03f742983
commit 64eb930176
1 changed files with 23 additions and 4 deletions
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27
hw/net/cadence_gem.c
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@ -382,6 +382,7 @@ typedef struct GemState {
unsigned rx_desc[2];
bool sar_active[4];
} GemState;
/* The broadcast MAC address: 0xFFFFFFFFFFFF */
@ -609,7 +610,7 @@ static int gem_mac_address_filter(GemState *s, const uint8_t *packet)
/* Check all 4 specific addresses */
gem_spaddr = (uint8_t *)&(s->regs[GEM_SPADDR1LO]);
for (i = 3; i >= 0; i--) {
if (!memcmp(packet, gem_spaddr + 8 * i, 6)) {
if (s->sar_active[i] && !memcmp(packet, gem_spaddr + 8 * i, 6)) {
return GEM_RX_SAR_ACCEPT + i;
}
}
@ -983,6 +984,7 @@ static void gem_phy_reset(GemState *s)
static void gem_reset(DeviceState *d)
{
int i;
GemState *s = GEM(d);
DB_PRINT("\n");
@ -1002,6 +1004,10 @@ static void gem_reset(DeviceState *d)
s->regs[GEM_DESCONF5] = 0x002f2145;
s->regs[GEM_DESCONF6] = 0x00000200;
for (i = 0; i < 4; i++) {
s->sar_active[i] = false;
}
gem_phy_reset(s);
gem_update_int_status(s);
@ -1151,6 +1157,18 @@ static void gem_write(void *opaque, hwaddr offset, uint64_t val,
s->regs[GEM_IMR] |= val;
gem_update_int_status(s);
break;
case GEM_SPADDR1LO:
case GEM_SPADDR2LO:
case GEM_SPADDR3LO:
case GEM_SPADDR4LO:
s->sar_active[(offset - GEM_SPADDR1LO) / 2] = false;
break;
case GEM_SPADDR1HI:
case GEM_SPADDR2HI:
case GEM_SPADDR3HI:
case GEM_SPADDR4HI:
s->sar_active[(offset - GEM_SPADDR1HI) / 2] = true;
break;
case GEM_PHYMNTNC:
if (val & GEM_PHYMNTNC_OP_W) {
uint32_t phy_addr, reg_num;
@ -1218,15 +1236,16 @@ static int gem_init(SysBusDevice *sbd)
static const VMStateDescription vmstate_cadence_gem = {
.name = "cadence_gem",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.version_id = 2,
.minimum_version_id = 2,
.minimum_version_id_old = 2,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, GemState, GEM_MAXREG),
VMSTATE_UINT16_ARRAY(phy_regs, GemState, 32),
VMSTATE_UINT8(phy_loop, GemState),
VMSTATE_UINT32(rx_desc_addr, GemState),
VMSTATE_UINT32(tx_desc_addr, GemState),
VMSTATE_BOOL_ARRAY(sar_active, GemState, 4),
}
};