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author | Alexey Brodkin <abrodkin@synopsys.com> | 2015-02-24 14:08:44 (GMT) |
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committer | Alexey Brodkin <abrodkin@synopsys.com> | 2015-04-03 06:47:49 (GMT) |
commit | 8ee28251d95e237302c7c44929e59a813e147622 (patch) | |
tree | 7b5843ebfca7e2842642f546bb08a5ae13bad88a /arch/arc/lib/start.S | |
parent | 4d93617d87285f01f450a30584520369ff3585d2 (diff) | |
download | u-boot-8ee28251d95e237302c7c44929e59a813e147622.tar.xz |
arc: move low-level interrupt and exception handlers in a separate file
This separation makes maintenance of code easier because those low-level
interrupt- or exception handling routines are pretty static and usually
require not much care while start-up code is a subject of modifications
and enhancements.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Diffstat (limited to 'arch/arc/lib/start.S')
-rw-r--r-- | arch/arc/lib/start.S | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S index 39eace3..3408f45 100644 --- a/arch/arc/lib/start.S +++ b/arch/arc/lib/start.S @@ -9,86 +9,6 @@ #include <linux/linkage.h> #include <asm/arcregs.h> -/* - * Note on the LD/ST addressing modes with address register write-back - * - * LD.a same as LD.aw - * - * LD.a reg1, [reg2, x] => Pre Incr - * Eff Addr for load = [reg2 + x] - * - * LD.ab reg1, [reg2, x] => Post Incr - * Eff Addr for load = [reg2] - */ - -.macro PUSH reg - st.a \reg, [%sp, -4] -.endm - -.macro PUSHAX aux - lr %r9, [\aux] - PUSH %r9 -.endm - -.macro SAVE_R1_TO_R24 - PUSH %r1 - PUSH %r2 - PUSH %r3 - PUSH %r4 - PUSH %r5 - PUSH %r6 - PUSH %r7 - PUSH %r8 - PUSH %r9 - PUSH %r10 - PUSH %r11 - PUSH %r12 - PUSH %r13 - PUSH %r14 - PUSH %r15 - PUSH %r16 - PUSH %r17 - PUSH %r18 - PUSH %r19 - PUSH %r20 - PUSH %r21 - PUSH %r22 - PUSH %r23 - PUSH %r24 -.endm - -.macro SAVE_ALL_SYS - /* saving %r0 to reg->r0 in advance since we read %ecr into it */ - st %r0, [%sp, -8] - lr %r0, [%ecr] /* all stack addressing is manual so far */ - st %r0, [%sp] - st %sp, [%sp, -4] - /* now move %sp to reg->r0 position so we can do "push" automatically */ - sub %sp, %sp, 8 - - SAVE_R1_TO_R24 - PUSH %r25 - PUSH %gp - PUSH %fp - PUSH %blink - PUSHAX %eret - PUSHAX %erstatus - PUSH %lp_count - PUSHAX %lp_end - PUSHAX %lp_start - PUSHAX %erbta -.endm - -.macro SAVE_EXCEPTION_SOURCE -#ifdef CONFIG_MMU - /* If MMU exists exception faulting address is loaded in EFA reg */ - lr %r0, [%efa] -#else - /* Otherwise in ERET (exception return) reg */ - lr %r0, [%eret] -#endif -.endm - ENTRY(_start) /* Setup interrupt vector base that matches "__text_start" */ sr __ivt_start, [ARC_AUX_INTR_VEC_BASE] @@ -110,70 +30,6 @@ clear_bss: j board_init_f ENDPROC(_start) -ENTRY(memory_error) - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_memory_error -ENDPROC(memory_error) - -ENTRY(instruction_error) - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_instruction_error -ENDPROC(instruction_error) - -ENTRY(interrupt_handler) - /* Todo - save and restore CPU context when interrupts will be in use */ - bl do_interrupt_handler - rtie -ENDPROC(interrupt_handler) - -ENTRY(EV_MachineCheck) - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_machine_check_fault -ENDPROC(EV_MachineCheck) - -ENTRY(EV_TLBMissI) - SAVE_ALL_SYS - mov %r0, %sp - j do_itlb_miss -ENDPROC(EV_TLBMissI) - -ENTRY(EV_TLBMissD) - SAVE_ALL_SYS - mov %r0, %sp - j do_dtlb_miss -ENDPROC(EV_TLBMissD) - -ENTRY(EV_TLBProtV) - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_tlb_prot_violation -ENDPROC(EV_TLBProtV) - -ENTRY(EV_PrivilegeV) - SAVE_ALL_SYS - mov %r0, %sp - j do_privilege_violation -ENDPROC(EV_PrivilegeV) - -ENTRY(EV_Trap) - SAVE_ALL_SYS - mov %r0, %sp - j do_trap -ENDPROC(EV_Trap) - -ENTRY(EV_Extension) - SAVE_ALL_SYS - mov %r0, %sp - j do_extension -ENDPROC(EV_Extension) - /* * void relocate_code (addr_sp, gd, addr_moni) * |