[PATCH 2/5] bsps/sparc: Remove support to load data section

[Sebastian Huber]

Remove the support to load the data section and rely on the boot loader.
The support for the data section loading was dead code and not tested.
In SMP configurations, this support was also broken since LEON3_Boot_Cpu
(in the data section due to the -1 initialization value) was used quite
early in the start sequence.
---
 bsps/sparc/shared/start/start.S | 36 ++++-----------------------------
 1 file changed, 4 insertions(+), 32 deletions(-)

diff --git a/bsps/sparc/shared/start/start.S b/bsps/sparc/shared/start/start.S
index f7caacf0e4..369ef72a94 100644
--- a/bsps/sparc/shared/start/start.S
+++ b/bsps/sparc/shared/start/start.S
@@ -331,47 +331,19 @@ SYM(hard_reset):
         mov     %sp, %fp                ! Set frame pointer
         nop
 
-        /*
-         *  Copy the initialized data to RAM
-         *
-         *  FROM:   _data_load_start
-         *  TO:     _data_start
-         *  LENGTH: (__bss_start - _data_start) bytes
-         */
-
-        sethi %hi(_data_load_start),%g1 ! g1 = start of initialized data in ROM
-        or    %g1,%lo(_data_load_start),%g1
-
-        sethi %hi(_data_start),%g3      ! g3 = start of initialized data in RAM
-        or    %g3,%lo(_data_start),%g3
+        /* clear the bss */
 
-        sethi %hi(__bss_start), %g2     ! g2 = end of initialized data in RAM
+        sethi %hi(__bss_start), %g2     ! g2 = start of bss
         or    %g2,%lo(__bss_start),%g2
 
-	cmp   %g1, %g3
-	be    1f
-	nop
-
-copy_data:
-        ldd   [%g1], %g4
-        std   %g4 , [%g3]               ! copy this double word
-        add   %g3, 8, %g3               ! bump the destination pointer
-        add   %g1, 8, %g1               ! bump the source pointer
-        cmp   %g3, %g2                  ! Is the pointer past the end of dest?
-        bl    copy_data
-        nop
-
-        /* clear the bss */
-1:
-
         sethi %hi(_end),%g3
         or    %g3,%lo(_end),%g3         ! g3 = end of bss
         mov   %g0,%g1                   ! so std has two zeros
-zerobss:
+.Lzerobss:
         std    %g0,[%g2]
         add    %g2,8,%g2
         cmp    %g2,%g3
-        bleu,a zerobss
+        bleu,a .Lzerobss
         nop
 
         mov     %g0, %o0                ! command line
-- 
2.26.2