riscv模拟器配置与fpga同步

slab内存分配器似乎不能支持小内存池，改为heap方式

riscv/startup/rtthread_irq.c

@@ -88,11 +88,27 @@ static void tick_handler(int vec, void* par) {
 }
 
 
-static uint32_t g_mem_heap[200 * 1024 / 4];
+static uint32_t g_mem_heap[100 * 1024 / 4];
+
+void mem_test_uint8_t() {
+  uint8_t *p = (uint8_t *)g_mem_heap;
+  for (int i = 0; i < 1024;i++){
+    p[i] = i & 0xff;
+  }
+  for (int i = 0; i < 1024;i++){
+    if(p[i]!=(i&0xff)){
+      rt_kprintf("mem test failed\n");
+    }
+  }
+  rt_kprintf("mem test succesed\n");
+
+}
+
 void rt_hw_board_init(void) {
   set_csr(mie, (1 << 3) | (1 << 7));
   set_csr(mip, (1 << 3));
-  rt_system_heap_init(g_mem_heap, g_mem_heap + sizeof(g_mem_heap) / 4);
+  mem_test_uint8_t();
+  rt_system_heap_init(g_mem_heap, &g_mem_heap[sizeof(g_mem_heap) / 4]);
   rt_hw_interrupt_init();
   rt_hw_interrupt_install(7, tick_handler, 0, "tick_handler");
 }