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-rw-r--r--arch/blackfin/mach-common/head.S52
1 files changed, 48 insertions, 4 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index 191b4e974c4b..3069df580729 100644
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -68,6 +68,16 @@ ENTRY(__start)
M2 = r0;
M3 = r0;
+ /*
+ * Clear ITEST_COMMAND and DTEST_COMMAND registers,
+ * Leaving these as non-zero can confuse the emulator
+ */
+ p0.L = LO(DTEST_COMMAND);
+ p0.H = HI(DTEST_COMMAND);
+ [p0] = R0;
+ [p0 + (ITEST_COMMAND - DTEST_COMMAND)] = R0;
+ CSYNC;
+
trace_buffer_init(p0,r0);
P0 = R1;
R0 = R1;
@@ -90,12 +100,46 @@ ENTRY(__start)
[p0] = R0;
SSYNC;
- /* Save RETX, in case of doublefault */
- p0.l = ___retx;
- p0.h = ___retx;
+ /* in case of double faults, save a few things */
+ p0.l = _init_retx;
+ p0.h = _init_retx;
R0 = RETX;
[P0] = R0;
+#ifdef CONFIG_DEBUG_DOUBLEFAULT
+ /* Only save these if we are storing them,
+ * This happens here, since L1 gets clobbered
+ * below
+ */
+ p0.l = _saved_retx;
+ p0.h = _saved_retx;
+ p1.l = _init_saved_retx;
+ p1.h = _init_saved_retx;
+ r0 = [p0];
+ [p1] = r0;
+
+ p0.l = _saved_dcplb_fault_addr;
+ p0.h = _saved_dcplb_fault_addr;
+ p1.l = _init_saved_dcplb_fault_addr;
+ p1.h = _init_saved_dcplb_fault_addr;
+ r0 = [p0];
+ [p1] = r0;
+
+ p0.l = _saved_icplb_fault_addr;
+ p0.h = _saved_icplb_fault_addr;
+ p1.l = _init_saved_icplb_fault_addr;
+ p1.h = _init_saved_icplb_fault_addr;
+ r0 = [p0];
+ [p1] = r0;
+
+ p0.l = _saved_seqstat;
+ p0.h = _saved_seqstat;
+ p1.l = _init_saved_seqstat;
+ p1.h = _init_saved_seqstat;
+ r0 = [p0];
+ [p1] = r0;
+#endif
+
/* Initialize stack pointer */
sp.l = lo(INITIAL_STACK);
sp.h = hi(INITIAL_STACK);
@@ -107,7 +151,7 @@ ENTRY(__start)
#endif
/* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */
- call _bf53x_relocate_l1_mem;
+ call _bfin_relocate_l1_mem;
#ifdef CONFIG_BFIN_KERNEL_CLOCK
call _start_dma_code;
#endif