summaryrefslogtreecommitdiff
path: root/arch/blackfin/mach-bf548/head.S
diff options
context:
space:
mode:
authorMike Frysinger <vapier.adi@gmail.com>2008-08-06 17:23:50 +0800
committerBryan Wu <cooloney@kernel.org>2008-08-06 17:23:50 +0800
commit17e89bcfa12f71b840361da07fe6c2f9c48d0605 (patch)
treec5ab94b397bcdfc5ffe0363f24ff83e012e8801a /arch/blackfin/mach-bf548/head.S
parent67618fd8748a5d83f6bdcd578c8e748c3f47c4d4 (diff)
downloadlinux-sh-17e89bcfa12f71b840361da07fe6c2f9c48d0605.tar.gz
Blackfin arch: unify the duplicated portions of __start and split mach-specific pieces into _mach_early_start where they will be easier to trim over time
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-bf548/head.S')
-rw-r--r--arch/blackfin/mach-bf548/head.S133
1 files changed, 3 insertions, 130 deletions
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
index 832a8d7212ac..cf94e1e222b8 100644
--- a/arch/blackfin/mach-bf548/head.S
+++ b/arch/blackfin/mach-bf548/head.S
@@ -30,145 +30,18 @@
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/blackfin.h>
-#include <asm/trace.h>
#ifdef CONFIG_BFIN_KERNEL_CLOCK
#include <asm/mach-common/clocks.h>
#include <asm/mach/mem_init.h>
#endif
-.extern ___bss_stop
-.extern ___bss_start
.extern _bf53x_relocate_l1_mem
-#define INITIAL_STACK 0xFFB01000
-
__INIT
-ENTRY(__start)
- /* R0: argument of command line string, passed from uboot, save it */
- R7 = R0;
- /* Enable Cycle Counter and Nesting Of Interrupts */
-#ifdef CONFIG_BFIN_SCRATCH_REG_CYCLES
- R0 = SYSCFG_SNEN;
-#else
- R0 = SYSCFG_SNEN | SYSCFG_CCEN;
-#endif
- SYSCFG = R0;
- R0 = 0;
-
- /* Clear Out All the data and pointer Registers*/
- R1 = R0;
- R2 = R0;
- R3 = R0;
- R4 = R0;
- R5 = R0;
- R6 = R0;
-
- P0 = R0;
- P1 = R0;
- P2 = R0;
- P3 = R0;
- P4 = R0;
- P5 = R0;
-
- LC0 = r0;
- LC1 = r0;
- L0 = r0;
- L1 = r0;
- L2 = r0;
- L3 = r0;
-
- /* Clear Out All the DAG Registers*/
- B0 = r0;
- B1 = r0;
- B2 = r0;
- B3 = r0;
-
- I0 = r0;
- I1 = r0;
- I2 = r0;
- I3 = r0;
-
- M0 = r0;
- M1 = r0;
- M2 = r0;
- M3 = r0;
-
- trace_buffer_init(p0,r0);
- P0 = R1;
- R0 = R1;
-
- /* Turn off the icache */
- p0.l = LO(IMEM_CONTROL);
- p0.h = HI(IMEM_CONTROL);
- R1 = [p0];
- R0 = ~ENICPLB;
- R0 = R0 & R1;
- [p0] = R0;
- SSYNC;
-
- /* Turn off the dcache */
- p0.l = LO(DMEM_CONTROL);
- p0.h = HI(DMEM_CONTROL);
- R1 = [p0];
- R0 = ~ENDCPLB;
- R0 = R0 & R1;
- [p0] = R0;
- SSYNC;
-
- /* Initialize stack pointer */
- SP.L = LO(INITIAL_STACK);
- SP.H = HI(INITIAL_STACK);
- FP = SP;
- USP = SP;
-
-#ifdef CONFIG_EARLY_PRINTK
- SP += -12;
- call _init_early_exception_vectors;
- SP += 12;
-#endif
-
- /* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */
- call _bf53x_relocate_l1_mem;
-#ifdef CONFIG_BFIN_KERNEL_CLOCK
- call _start_dma_code;
-#endif
-
- /* This section keeps the processor in supervisor mode
- * during kernel boot. Switches to user mode at end of boot.
- * See page 3-9 of Hardware Reference manual for documentation.
- */
-
- /* EVT15 = _real_start */
-
- p0.l = lo(EVT15);
- p0.h = hi(EVT15);
- p1.l = _real_start;
- p1.h = _real_start;
- [p0] = p1;
- csync;
-
- p0.l = lo(IMASK);
- p0.h = hi(IMASK);
- p1.l = IMASK_IVG15;
- p1.h = 0x0;
- [p0] = p1;
- csync;
-
- raise 15;
- p0.l = .LWAIT_HERE;
- p0.h = .LWAIT_HERE;
- reti = p0;
-#if ANOMALY_05000281
- nop;
- nop;
- nop;
-#endif
- rti;
-
-.LWAIT_HERE:
- jump .LWAIT_HERE;
-ENDPROC(__start)
+ENTRY(_mach_early_start)
+ rts;
+ENDPROC(_mach_early_start)
__FINIT