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add the possibility to enable the L1 cache for the receive buffer

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This commit is contained in:
Stefan Lankes 2011-09-23 11:52:43 -07:00
parent 903f33f40b
commit ada6dc727a
1 changed files with 15 additions and 0 deletions
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15
drivers/net/rckemac.c
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@ -43,6 +43,15 @@
#include <netif/etharp.h>
#include <net/rckemac.h>
/* enables the cache for the receive buffers */
//#define RX_CACHING 1
#ifdef RX_CACHING
#define CL1INV asm volatile ( ".byte 0x0f; .byte 0x0a;\n" ) // CL1FLUSHMB
#else
#define CL1INV
#endif
/* Limits */
#define BUFFER_ORDER 9
#define BUFFER_NUM (1 << BUFFER_ORDER)
@ -379,6 +388,8 @@ static void rckemacif_rx_handler(struct netif* netif, unsigned int write_offset)
}
again:
CL1INV; // invalidate L1 cache entries of the receiver buffers
read_offset++;
if (read_offset < 1 || read_offset > rckemacif->rx_buffer_max) {
read_offset = 1;
@ -586,7 +597,11 @@ err_t rckemacif_init(struct netif* netif)
rckemacif->core = core;
/* allocate the receive buffer */
#ifdef RX_CACHING
rckemacif->rx_buffer = mem_allocation(BUFFER_SIZE, MAP_KERNEL_SPACE|MAP_MPE);
#else
rckemacif->rx_buffer = mem_allocation(BUFFER_SIZE, MAP_KERNEL_SPACE|MAP_NO_CACHE);
#endif
if (!(rckemacif->rx_buffer)) {
LWIP_DEBUGF(NETIF_DEBUG, ("rckemacif_init: out of memory\n"));
kfree(rckemacif, sizeof(rckemacif_t));