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smc91c111 fixes (Paul Brook) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1713 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-12-18 17:39:52 +00:00
parent 68998c5de3
commit 5198cfd927
1 changed files with 27 additions and 5 deletions
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32
hw/smc91c111.c
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@ -35,8 +35,10 @@ typedef struct {
int tx_fifo[NUM_PACKETS];
int rx_fifo_len;
int rx_fifo[NUM_PACKETS];
int tx_fifo_done_len;
int tx_fifo_done[NUM_PACKETS];
/* Packet buffer memory. */
uint8_t data[2048][NUM_PACKETS];
uint8_t data[NUM_PACKETS][2048];
uint8_t int_level;
uint8_t int_mask;
uint8_t macaddr[6];
@ -81,6 +83,8 @@ static void smc91c111_update(smc91c111_state *s)
if (s->tx_fifo_len == 0)
s->int_level |= INT_TX_EMPTY;
if (s->tx_fifo_done_len != 0)
s->int_level |= INT_TX;
level = (s->int_level & s->int_mask) != 0;
pic_set_irq_new(s->pic, s->irq, level);
}
@ -128,6 +132,18 @@ static void smc91c111_pop_rx_fifo(smc91c111_state *s)
smc91c111_update(s);
}
/* Remove an item from the TX completion FIFO. */
static void smc91c111_pop_tx_fifo_done(smc91c111_state *s)
{
int i;
if (s->tx_fifo_done_len == 0)
return;
s->tx_fifo_done_len--;
for (i = 0; i < s->tx_fifo_done_len; i++)
s->tx_fifo_done[i] = s->tx_fifo_done[i + 1];
}
/* Release the memory allocated to a packet. */
static void smc91c111_release_packet(smc91c111_state *s, int packet)
{
@ -184,12 +200,13 @@ static void smc91c111_do_tx(smc91c111_state *s)
add_crc = 0;
#endif
if (s->ctr & CTR_AUTO_RELEASE)
/* Race? */
smc91c111_release_packet(s, packetnum);
else if (s->tx_fifo_done_len < NUM_PACKETS)
s->tx_fifo_done[s->tx_fifo_done_len++] = packetnum;
qemu_send_packet(s->vc, p, len);
}
s->tx_fifo_len = 0;
if ((s->ctr & CTR_AUTO_RELEASE) == 0)
s->int_level |= INT_TX;
smc91c111_update(s);
}
@ -206,6 +223,7 @@ static void smc91c111_reset(smc91c111_state *s)
{
s->bank = 0;
s->tx_fifo_len = 0;
s->tx_fifo_done_len = 0;
s->rx_fifo_len = 0;
s->allocated = 0;
s->packet_num = 0;
@ -306,6 +324,7 @@ static void smc91c111_writeb(void *opaque, target_phys_addr_t offset,
case 2: /* Reset MMU. */
s->allocated = 0;
s->tx_fifo_len = 0;
s->tx_fifo_done_len = 0;
s->rx_fifo_len = 0;
s->tx_alloc = 0;
break;
@ -326,6 +345,7 @@ static void smc91c111_writeb(void *opaque, target_phys_addr_t offset,
break;
case 7: /* Reset TX FIFO. */
s->tx_fifo_len = 0;
s->tx_fifo_done_len = 0;
break;
}
return;
@ -364,6 +384,8 @@ static void smc91c111_writeb(void *opaque, target_phys_addr_t offset,
return;
case 12: /* Interrupt ACK. */
s->int_level &= ~(value & 0xd6);
if (value & INT_TX)
smc91c111_pop_tx_fifo_done(s);
smc91c111_update(s);
return;
case 13: /* Interrupt mask. */
@ -473,10 +495,10 @@ static uint32_t smc91c111_readb(void *opaque, target_phys_addr_t offset)
case 3: /* Allocation Result. */
return s->tx_alloc;
case 4: /* TX FIFO */
if (s->tx_fifo_len == 0)
if (s->tx_fifo_done_len == 0)
return 0x80;
else
return s->tx_fifo[0];
return s->tx_fifo_done[0];
case 5: /* RX FIFO */
if (s->rx_fifo_len == 0)
return 0x80;