帮忙查看下代码，屏蔽掉cache情况似乎有点改善，不过我对mmu和cache并不了解，不清楚其配置和使用。
- static struct mem_desc hw_mem_desc[] =
- {
- { 0x00000000, 0xFFFFFFFF, 0x00000000, RW_NCNB }, /* None cached for 4G memory */
- { 0x00000000, 0x04000000-1, 0x00000000, RW_CB }, /* 64M cached DDR memory */
- { 0x80000000, 0x84000000-1, 0x80000000, RW_CNB }, /* Shadow DDR Map */
- { 0x3C000000, 0x3C00E000-1, 0x3C000000, RW_NCNB }, /* 56K SRAM memory */
- { 0xBC000000, 0xBC00E000-1, 0xBC000000, RW_NCNB } /* 56K Shadow memory */
- };
- void rt_hw_board_init(void)
- {
- /* initialize mmu */
- rt_hw_mmu_init(&hw_mem_desc[0], sizeof(hw_mem_desc) / sizeof(hw_mem_desc[0]));
- //rt_hw_cpu_dcache_enable();
- //rt_hw_cpu_icache_enable();
-
- /* Enable GPIO Clock */
- outpw(REG_CLK_HCLKEN, 0x0527);
- outpw(REG_CLK_PCLKEN0, inpw(REG_CLK_PCLKEN0) | (1<<3)); //Enable GPIO engin clock.
-
- /* initialize hardware interrupt */
- rt_hw_interrupt_init();
- /* initialize uart */
- rt_hw_uart_init();
- /* initialize timer0 */
- rt_hw_timer0_init();
-
- rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
-
- #ifdef RT_USING_HEAP
- /* init memory system */
- rt_system_heap_init(BOARD_HEAP_START, BOARD_HEAP_END);
- #endif
- /* Board underlying hardware initialization */
- #ifdef RT_USING_COMPONENTS_INIT
- rt_components_board_init();
- #endif
- }
| 
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