From 4fae35a53b3e958254d6574a1cc7e10811fc6726 Mon Sep 17 00:00:00 2001 From: Anatolij Gustschin Date: Mon, 25 Feb 2008 20:54:04 +0100 Subject: ppc4xx: Fix problem in 4xx_enet.c driver U-Boot crashes in the net loop if CONFIG_4xx_DCACHE is enabled. To reproduce the problem ensure that 'ethrotate' environment variable isn't set to "no" and then run "tftp 200000 not_existent_file". This patch tries to fix the issue. Signed-off-by: Anatolij Gustschin --- cpu/ppc4xx/4xx_enet.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/cpu/ppc4xx/4xx_enet.c b/cpu/ppc4xx/4xx_enet.c index 44659ffcd9..5ef1005b1f 100644 --- a/cpu/ppc4xx/4xx_enet.c +++ b/cpu/ppc4xx/4xx_enet.c @@ -487,6 +487,9 @@ static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis) #endif u32 bd_cached; u32 bd_uncached = 0; +#ifdef CONFIG_4xx_DCACHE + static u32 last_used_ea = 0; +#endif EMAC_4XX_HW_PST hw_p = dev->priv; @@ -850,7 +853,12 @@ static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis) #ifdef CONFIG_4xx_DCACHE flush_dcache_range(bd_cached, bd_cached + MAL_ALLOC_SIZE); - bd_uncached = bis->bi_memsize; + if (!last_used_ea) + bd_uncached = bis->bi_memsize; + else + bd_uncached = last_used_ea + MAL_ALLOC_SIZE; + + last_used_ea = bd_uncached; program_tlb(bd_cached, bd_uncached, MAL_ALLOC_SIZE, TLB_WORD2_I_ENABLE); #else -- cgit v1.2.3