diff options
Diffstat (limited to 'arch/blackfin/mach-common/head.S')
| -rw-r--r-- | arch/blackfin/mach-common/head.S | 117 |
1 files changed, 35 insertions, 82 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S index f123a62e2451..e1e42c029e15 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) |