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authorMike Frysinger <vapier.adi@gmail.com>2008-10-27 18:17:41 +0800
committerBryan Wu <cooloney@kernel.org>2008-10-27 18:17:41 +0800
commitf940260a980a1ad7570dfd7a4b73c6ad2207f738 (patch)
tree9b5391ecbb97e601f811481dd88ca02fa29d14f9 /arch/blackfin/mach-common/head.S
parentede6f5aea054d3fb67c78857f7abdee602302043 (diff)
Blackfin arch: unify duplicated bss init code
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-common/head.S')
-rw-r--r--arch/blackfin/mach-common/head.S66
1 files changed, 19 insertions, 47 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index f123a62e245..42ee2b1831b 100644
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -195,6 +195,19 @@ ENDPROC(__start)
# define WDOG_CTL WDOGA_CTL
#endif
+ENTRY(__init_clear_bss)
+ r2 = r2 - r1;
+ cc = r2 == 0;
+ if cc jump .L_bss_done;
+ r2 >>= 2;
+ p1 = r1;
+ p2 = r2;
+ lsetup (1f, 1f) lc0 = p2;
+1: [p1++] = r0;
+.L_bss_done:
+ rts;
+ENDPROC(__init_clear_bss)
+
ENTRY(_real_start)
/* Enable nested interrupts */
[--sp] = reti;
@@ -206,75 +219,34 @@ ENTRY(_real_start)
w[p0] = r0;
ssync;
+ r0 = 0 (x);
+ /* Zero out all of the fun bss regions */
#if L1_DATA_A_LENGTH > 0
r1.l = __sbss_l1;
r1.h = __sbss_l1;
r2.l = __ebss_l1;
r2.h = __ebss_l1;
- r0 = 0 (z);
- r2 = r2 - r1;
- cc = r2 == 0;
- if cc jump .L_a_l1_done;
- r2 >>= 2;
- p1 = r1;
- p2 = r2;
- lsetup (.L_clear_a_l1, .L_clear_a_l1 ) lc0 = p2;
-.L_clear_a_l1:
- [p1++] = r0;
-.L_a_l1_done:
+ call __init_clear_bss
#endif
-
#if L1_DATA_B_LENGTH > 0
r1.l = __sbss_b_l1;
r1.h = __sbss_b_l1;
r2.l = __ebss_b_l1;
r2.h = __ebss_b_l1;
- r0 = 0 (z);
- r2 = r2 - r1;
- cc = r2 == 0;
- if cc jump .L_b_l1_done;
- r2 >>= 2;
- p1 = r1;
- p2 = r2;
- lsetup (.L_clear_b_l1, .L_clear_b_l1 ) lc0 = p2;
-.L_clear_b_l1:
- [p1++] = r0;
-.L_b_l1_done:
+ call __init_clear_bss
#endif
-
#if L2_LENGTH > 0
r1.l = __sbss_l2;
r1.h = __sbss_l2;
r2.l = __ebss_l2;
r2.h = __ebss_l2;
- r0 = 0 (z);
- r2 = r2 - r1;
- cc = r2 == 0;
- if cc jump .L_l2_done;
- r2 >>= 2;
- p1 = r1;
- p2 = r2;
- lsetup (.L_clear_l2, .L_clear_l2 ) lc0 = p2;
-.L_clear_l2:
- [p1++] = r0;
-.L_l2_done:
+ call __init_clear_bss
#endif
-
- /* Zero out the bss region
- * Note: this will fail if bss is 0 bytes ...
- */
- r0 = 0 (z);
r1.l = ___bss_start;
r1.h = ___bss_start;
r2.l = ___bss_stop;
r2.h = ___bss_stop;
- r2 = r2 - r1;
- r2 >>= 2;
- p1 = r1;
- p2 = r2;
- lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
-.L_clear_bss:
- [p1++] = r0;
+ call __init_clear_bss
/* In case there is a NULL pointer reference,
* zero out region before stext