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Merge pull request #79 from weety/at91sam9260

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Use SRAM as EMAC transmit buffer, to avoid the underrun error, especiall...
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Bernard Xiong
2013-04-08 08:28:10 -07:00
parent 06c6630bbf d9d39a8d21
commit 93a01ee949
2 changed files with 274 additions and 66 deletions
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bsp/at91sam9260/macb.c
+273 -65
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libcpu/arm/at91sam926x/mmu.c
+1 -1
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@@ -471,7 +471,7 @@ void rt_hw_mmu_init(void)
mmu_setmtt(0x00000000, 0xFFFFFFFF, 0x00000000, RW_NCNB); /* None cached for 4G memory */
mmu_setmtt(0x20000000, 0x24000000-1, 0x20000000, RW_CB); /* 64M cached SDRAM memory */
mmu_setmtt(0x00000000, 0x100000, 0x20000000, RW_CB); /* isr vector table */
mmu_setmtt(0x90000000, 0x100000, 0x00000000, RW_CB); /* 4K cached internal memory */
mmu_setmtt(0x90000000, 0x90400000 - 1, 0x00200000, RW_NCNB); /* 4K SRAM0 + 4k SRAM1 */
mmu_setmtt(0xA0000000, 0xA4000000-1, 0x20000000, RW_NCNB); /* 64M none-cached SDRAM memory */
/* set MMU table address */