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Blackfin arch: Fix bug - 561 SMP kernel can't boot from jffs2

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bss_l2 section is garbage when the data in this section is used by
_bfin_relocate_l1_mem, so move the zero out function ahead.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Graf Yang 2009-02-04 16:49:45 +08:00 committed by Bryan Wu
parent be1d8543a8
commit 9960aa6a07
1 changed files with 42 additions and 42 deletions
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84
arch/blackfin/mach-common/head.S
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@ -17,6 +17,19 @@
__INIT
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)
#define INITIAL_STACK (L1_SCRATCH_START + L1_SCRATCH_LENGTH - 12)
ENTRY(__start)
@ -144,6 +157,35 @@ ENTRY(__start)
call _init_early_exception_vectors;
#endif
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;
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;
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;
call __init_clear_bss
#endif
r1.l = ___bss_start;
r1.h = ___bss_start;
r2.l = ___bss_stop;
r2.h = ___bss_stop;
call __init_clear_bss
/* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */
call _bfin_relocate_l1_mem;
#ifdef CONFIG_BFIN_KERNEL_CLOCK
@ -185,19 +227,6 @@ 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;
@ -209,35 +238,6 @@ 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;
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;
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;
call __init_clear_bss
#endif
r1.l = ___bss_start;
r1.h = ___bss_start;
r2.l = ___bss_stop;
r2.h = ___bss_stop;
call __init_clear_bss
/* Pass the u-boot arguments to the global value command line */
R0 = R7;
call _cmdline_init;