MIPS: start.S: optimize BSS initialization

[karo-tx-uboot.git] / arch / mips / cpu / mips64 / start.S

diff --git a/arch/mips/cpu/mips64/start.S b/arch/mips/cpu/mips64/start.S
index c0ae41a18a09ccbc10fca8646dd00f3b2ddaea88..ba4ca4de38e010073d3a8027b74e309259fbfb90 100644 (file)
--- a/arch/mips/cpu/mips64/start.S
+++ b/arch/mips/cpu/mips64/start.S
@@ -220,17 +220,19 @@ in_ram:
        blt     t2, t3, 1b
         daddi  t8, 8
 
-       /* Clear BSS */
-       ld      t1, -24(t0)             # t1 <-- uboot_end_data
-       ld      t2, -16(t0)             # t2 <-- uboot_end
-       dadd    t1, s1                  # adjust pointers
-       dadd    t2, s1
+       /*
+        * Clear BSS
+        *
+        * GOT is now relocated. Thus __bss_start and __bss_end can be
+        * accessed directly via $gp.
+        */
+       dla     t1, __bss_start         # t1 <-- __bss_start
+       dla     t2, __bss_end           # t2 <-- __bss_end
 
-       dsub    t1, 8
 1:
-       daddi   t1, 8
-       bltl    t1, t2, 1b
-        sd     zero, 0(t1)
+       sd      zero, 0(t1)
+       blt     t1, t2, 1b
+        daddi  t1, 8
 
        move    a0, s0                  # a0 <-- gd
        dla     t9, board_init_r