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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-01-08 16:24:38 +1100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-01-08 16:24:38 +1100
commit24f030175d30f019be41766cdf88c2ff03de19ff (patch)
tree354232a84e82d5a721ed7b1a9af580ff2a59be8f /arch/blackfin/mach-common/head.S
parent4aa12f7b927c3cac0e0cf3503642597527d0ece0 (diff)
parent9e42d0cf5020aaf217433cad1a224745241d212a (diff)
Merge commit 'origin/master' into next
Diffstat (limited to 'arch/blackfin/mach-common/head.S')
-rw-r--r--arch/blackfin/mach-common/head.S117
1 files changed, 35 insertions, 82 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index f123a62e245..e1e42c029e1 100644
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -13,6 +13,7 @@
#include <asm/blackfin.h>
#include <asm/thread_info.h>
#include <asm/trace.h>
+#include <asm/asm-offsets.h>
__INIT
@@ -111,33 +112,26 @@ ENTRY(__start)
* This happens here, since L1 gets clobbered
* below
*/
- p0.l = _saved_retx;
- p0.h = _saved_retx;
+ GET_PDA(p0, r0);
+ r7 = [p0 + PDA_RETX];
p1.l = _init_saved_retx;
p1.h = _init_saved_retx;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
- p0.l = _saved_dcplb_fault_addr;
- p0.h = _saved_dcplb_fault_addr;
+ r7 = [p0 + PDA_DCPLB];
p1.l = _init_saved_dcplb_fault_addr;
p1.h = _init_saved_dcplb_fault_addr;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
- p0.l = _saved_icplb_fault_addr;
- p0.h = _saved_icplb_fault_addr;
+ r7 = [p0 + PDA_ICPLB];
p1.l = _init_saved_icplb_fault_addr;
p1.h = _init_saved_icplb_fault_addr;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
- p0.l = _saved_seqstat;
- p0.h = _saved_seqstat;
+ r7 = [p0 + PDA_SEQSTAT];
p1.l = _init_saved_seqstat;
p1.h = _init_saved_seqstat;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
#endif
/* Initialize stack pointer */
@@ -153,7 +147,7 @@ ENTRY(__start)
/* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */
call _bfin_relocate_l1_mem;
#ifdef CONFIG_BFIN_KERNEL_CLOCK
- call _start_dma_code;
+ call _init_clocks;
#endif
/* This section keeps the processor in supervisor mode
@@ -170,12 +164,8 @@ ENTRY(__start)
[p0] = p1;
csync;
- p0.l = lo(IMASK);
- p0.h = hi(IMASK);
- p1.l = IMASK_IVG15;
- p1.h = 0x0;
- [p0] = p1;
- csync;
+ r0 = EVT_IVG15 (z);
+ sti r0;
raise 15;
p0.l = .LWAIT_HERE;
@@ -195,6 +185,19 @@ 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;
@@ -206,87 +209,34 @@ 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;
-
- /* In case there is a NULL pointer reference,
- * zero out region before stext
- */
- p1 = r0;
- r2.l = __stext;
- r2.h = __stext;
- r2 >>= 2;
- p2 = r2;
- lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
-.L_clear_zero:
- [p1++] = r0;
+ call __init_clear_bss
/* Pass the u-boot arguments to the global value command line */
R0 = R7;
@@ -299,6 +249,9 @@ ENTRY(_real_start)
sp = sp + p1;
usp = sp;
fp = sp;
+ sp += -12;
+ call _init_pda
+ sp += 12;
jump.l _start_kernel;
ENDPROC(_real_start)