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software/libnet/microudp: simplify rxbuffer managment

This commit is contained in:
Florent Kermarrec 2019-04-12 17:14:07 +02:00
parent fdeff7f64f
commit 92a79c6dc1
1 changed files with 3 additions and 12 deletions
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15
litex/soc/software/libnet/microudp.c
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@ -114,12 +114,8 @@ typedef union {
unsigned char raw[ETHMAC_SLOT_SIZE];
} ethernet_buffer;
static unsigned int rxslot;
static unsigned int rxlen;
static ethernet_buffer *rxbuffer;
static ethernet_buffer *rxbuffer0;
static ethernet_buffer *rxbuffer1;
static unsigned int txslot;
static unsigned int txlen;
static ethernet_buffer *txbuffer;
@ -416,15 +412,11 @@ void microudp_start(const unsigned char *macaddr, unsigned int ip)
ethmac_sram_reader_ev_pending_write(ETHMAC_EV_SRAM_READER);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
rxbuffer0 = (ethernet_buffer *)(ETHMAC_BASE + 0*ETHMAC_SLOT_SIZE);
rxbuffer1 = (ethernet_buffer *)(ETHMAC_BASE + 1*ETHMAC_SLOT_SIZE);
txbuffer0 = (ethernet_buffer *)(ETHMAC_BASE + 2*ETHMAC_SLOT_SIZE);
txbuffer1 = (ethernet_buffer *)(ETHMAC_BASE + 3*ETHMAC_SLOT_SIZE);
rxslot = 0;
txslot = 0;
rxbuffer = rxbuffer0;
txbuffer = txbuffer0;
for(i=0;i<6;i++)
@ -435,18 +427,17 @@ void microudp_start(const unsigned char *macaddr, unsigned int ip)
for(i=0;i<6;i++)
cached_mac[i] = 0;
rxbuffer = (ethernet_buffer *)ETHMAC_BASE;
rx_callback = (udp_callback)0;
}
void microudp_service(void)
{
unsigned int rxslot;
if(ethmac_sram_writer_ev_pending_read() & ETHMAC_EV_SRAM_WRITER) {
rxslot = ethmac_sram_writer_slot_read();
rxbuffer = (ethernet_buffer *)(ETHMAC_BASE + ETHMAC_SLOT_SIZE * rxslot);
rxlen = ethmac_sram_writer_length_read();
if (rxslot)
rxbuffer = rxbuffer1;
else
rxbuffer = rxbuffer0;
process_frame();
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
}