diff options
author | Mike Frysinger <vapier.adi@gmail.com> | 2008-08-06 17:23:50 +0800 |
---|---|---|
committer | Bryan Wu <cooloney@kernel.org> | 2008-08-06 17:23:50 +0800 |
commit | 17e89bcfa12f71b840361da07fe6c2f9c48d0605 (patch) | |
tree | c5ab94b397bcdfc5ffe0363f24ff83e012e8801a /arch/blackfin/mach-bf537/head.S | |
parent | 67618fd8748a5d83f6bdcd578c8e748c3f47c4d4 (diff) |
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-bf537/head.S')
-rw-r--r-- | arch/blackfin/mach-bf537/head.S | 132 |
1 files changed, 3 insertions, 129 deletions
diff --git a/arch/blackfin/mach-bf537/head.S b/arch/blackfin/mach-bf537/head.S index c062acb04836..6a02e472587a 100644 --- a/arch/blackfin/mach-bf537/head.S +++ b/arch/blackfin/mach-bf537/head.S @@ -30,93 +30,16 @@ #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; - +ENTRY(_mach_early_start) /* Initialise General-Purpose I/O Modules on BF537 */ p0.h = hi(BFIN_PORT_MUX); p0.l = lo(BFIN_PORT_MUX); @@ -166,57 +89,8 @@ ENTRY(__start) w[p0] = r0.L; /* To enable UART clock */ 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) + rts; +ENDPROC(_mach_early_start) __FINIT |