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ppc4xx: Fix problem in 4xx_enet.c driver

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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 <agust@denx.de>
This commit is contained in:
Anatolij Gustschin 2008-02-25 20:54:04 +01:00 committed by Wolfgang Denk
parent 60ec654c5e
commit 4fae35a53b
1 changed files with 9 additions and 1 deletions
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10
cpu/ppc4xx/4xx_enet.c
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@ -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