diff --git a/arch/sparc/src/bm3803/bm3803_head.S b/arch/sparc/src/bm3803/bm3803_head.S
index 7ee12a61b1..aa9833910b 100644
--- a/arch/sparc/src/bm3803/bm3803_head.S
+++ b/arch/sparc/src/bm3803/bm3803_head.S
@@ -324,7 +324,7 @@ __start:
 
         set   BM3803_REG,%g1
         ld    [%g1+4], %g2
-        or    %g2, 0x4f, %g2        	/*将存储器配置为读改写（区别于写选通），等待后期设置为最大*/
+        or    %g2, 0x4f, %g2        	!Enable read-modify-write cycle(no byte write strobe),maximum wait-states
         st    %g2, [%g1+4]
         nop
 
diff --git a/arch/sparc/src/sparc_v8/up_systemreset.c b/arch/sparc/src/sparc_v8/up_systemreset.c
index 960518ccae..adc0bf5e7d 100644
--- a/arch/sparc/src/sparc_v8/up_systemreset.c
+++ b/arch/sparc/src/sparc_v8/up_systemreset.c
@@ -49,19 +49,11 @@
 
 void up_systemreset(void)
 {
-  asm("st  %g0,[%g1+0x90]"); /* ÐŽÈëÖжό¶±ðºÍÓÅÏÈ¿ØÖƌĎæÆ÷£¬ÆÁ±ÎËùÓÐÖÐ¶Ï */
-  asm("st  %g0,[%g1+0x94]"); /* ÐŽÈëÖжÏÇëÇóŒÄŽæÆ÷,Çå³ýËùÓеÄÖÐ¶Ï */
-  asm("st  %g0,[%g1+0x98]"); /* ÐŽÈëÇ¿ÖÆÖжόĎæÆ÷£¬Çå³ýËùÓÐÖÐ¶Ï */
+  (void)sparc_disable_interrupts();
 
-  /* Çå³ýËùÓб»×èÈûµÄÖÐ¶Ï */
+  /* reboot from ram */
 
-  asm("set  0xfffe,%g2");    /* ÉèÖÃÖжÏÇå³ýŒÄŽæÆ÷µÄÖµ */
-  asm("st  %g2,[%g1+0x9c]"); /* ÐŽÈëÖжÏÇå³ýŒÄŽæÆ÷£¬Çå³ýËùÓеÄÖÐ¶Ï */
-
-  asm("set 0x1024, %l4");
-  asm("jmp %l4");
-  asm("nop");
-  asm("nop");
+  ((void (*)(void))CONFIG_RAM_START)();
 
   /* Wait for the reset */