Merge pull request #3 from OpenXiangShan/prefetch_test

add the softprefetchtest 10-08

tests/softprefetchtest/Makefile

@@ -0,0 +1,4 @@
+NAME := aliastest
+SRCS := $(shell find -L ./src/ -name "*.[cS]")
+
+include $(AM_HOME)/Makefile.app

tests/softprefetchtest/include/aliastest.h

@@ -0,0 +1,11 @@
+#ifndef __AMUNIT_H__
+#define __AMUNIT_H__
+
+#include <am.h>
+#include <klib.h>
+#include <klib-macros.h>
+#include <encoding.h>
+
+void do_init();
+
+#endif

tests/softprefetchtest/src/alias.S

@@ -0,0 +1,66 @@
+# See LICENSE for license details.
+
+#*****************************************************************************
+# softprefetch-alias.S
+#-----------------------------------------------------------------------------
+#
+# Test that whether the cpu sppourt the softprefetch instruciton.
+#
+
+#include "encoding.h"
+
+#define TESTNUM gp
+
+.global do_init
+do_init:
+  li a2,  0x008000c000
+  li a3,  0x008000cf00
+  li a5,  0x0000000080 //128 times
+  li a6,  0x0000000001
+  la a4, code_page
+  jr a4
+
+.data
+.align
+code_page:
+  .word 0x02166013 //prefetch.r 0x10(a2), offset is 32, base register is a2
+  .word 0x0236e013 //prefetch.w 0x10(a3), offset is 32, base register is a3 
+  delay_time_1:
+    sub a5, a5, a6 
+    bnez a5, delay_time_1
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  lw s2, 32(a2)
+  sw a6, 32(a3) 
+  li a5,  0x0000000080 //128 times 
+  delay_time_2:
+    sub a5, a5, a6 
+    bnez a5, delay_time_2
+  .word 0x0000006b
+
+.align 12
+data_page: .dword 0

tests/softprefetchtest/src/main.c

@@ -0,0 +1,11 @@
+#include <aliastest.h>
+
+void map_kernel_page() {
+
+}
+
+int main() {
+    printf("Alias test shall pass when difftest gives no error\n");
+    do_init();
+    return 0;
+}