aboutsummaryrefslogtreecommitdiff
path: root/hw/net/stellaris_enet.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/net/stellaris_enet.c')
-rw-r--r--hw/net/stellaris_enet.c40
1 files changed, 19 insertions, 21 deletions
diff --git a/hw/net/stellaris_enet.c b/hw/net/stellaris_enet.c
index 1cb95e012f..9e8f143ea5 100644
--- a/hw/net/stellaris_enet.c
+++ b/hw/net/stellaris_enet.c
@@ -67,8 +67,7 @@ typedef struct {
uint8_t data[2048];
int len;
} rx[31];
- uint8_t *rx_fifo;
- int rx_fifo_len;
+ int rx_fifo_offset;
int next_packet;
NICState *nic;
NICConf conf;
@@ -216,21 +215,21 @@ static uint64_t stellaris_enet_read(void *opaque, hwaddr offset,
case 0x0c: /* TCTL */
return s->tctl;
case 0x10: /* DATA */
- if (s->rx_fifo_len == 0) {
- if (s->np == 0) {
- BADF("RX underflow\n");
- return 0;
- }
- s->rx_fifo_len = s->rx[s->next_packet].len;
- s->rx_fifo = s->rx[s->next_packet].data;
- DPRINTF("RX FIFO start packet len=%d\n", s->rx_fifo_len);
+ {
+ uint8_t *rx_fifo;
+
+ if (s->np == 0) {
+ BADF("RX underflow\n");
+ return 0;
}
- val = s->rx_fifo[0] | (s->rx_fifo[1] << 8) | (s->rx_fifo[2] << 16)
- | (s->rx_fifo[3] << 24);
- s->rx_fifo += 4;
- s->rx_fifo_len -= 4;
- if (s->rx_fifo_len <= 0) {
- s->rx_fifo_len = 0;
+
+ rx_fifo = s->rx[s->next_packet].data + s->rx_fifo_offset;
+
+ val = rx_fifo[0] | (rx_fifo[1] << 8) | (rx_fifo[2] << 16)
+ | (rx_fifo[3] << 24);
+ s->rx_fifo_offset += 4;
+ if (s->rx_fifo_offset >= s->rx[s->next_packet].len) {
+ s->rx_fifo_offset = 0;
s->next_packet++;
if (s->next_packet >= 31)
s->next_packet = 0;
@@ -238,6 +237,7 @@ static uint64_t stellaris_enet_read(void *opaque, hwaddr offset,
DPRINTF("RX done np=%d\n", s->np);
}
return val;
+ }
case 0x14: /* IA0 */
return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8)
| (s->conf.macaddr.a[2] << 16)
@@ -291,8 +291,8 @@ static void stellaris_enet_write(void *opaque, hwaddr offset,
case 0x08: /* RCTL */
s->rctl = value;
if (value & SE_RCTL_RSTFIFO) {
- s->rx_fifo_len = 0;
s->np = 0;
+ s->rx_fifo_offset = 0;
stellaris_enet_update(s);
}
break;
@@ -402,8 +402,7 @@ static void stellaris_enet_save(QEMUFile *f, void *opaque)
}
qemu_put_be32(f, s->next_packet);
- qemu_put_be32(f, s->rx_fifo - s->rx[s->next_packet].data);
- qemu_put_be32(f, s->rx_fifo_len);
+ qemu_put_be32(f, s->rx_fifo_offset);
}
static int stellaris_enet_load(QEMUFile *f, void *opaque, int version_id)
@@ -432,8 +431,7 @@ static int stellaris_enet_load(QEMUFile *f, void *opaque, int version_id)
}
s->next_packet = qemu_get_be32(f);
- s->rx_fifo = s->rx[s->next_packet].data + qemu_get_be32(f);
- s->rx_fifo_len = qemu_get_be32(f);
+ s->rx_fifo_offset = qemu_get_be32(f);
return 0;
}