diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arc/lib/Makefile | 1 | ||||
| -rw-r--r-- | arch/arc/lib/ints_low.S | 151 | ||||
| -rw-r--r-- | arch/arc/lib/start.S | 144 |
3 files changed, 152 insertions, 144 deletions
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile index ad66ac2..b1f1fbe 100644 --- a/arch/arc/lib/Makefile +++ b/arch/arc/lib/Makefile @@ -19,6 +19,7 @@ obj-y += memset.o obj-y += reset.o obj-y += timer.o obj-y += start.o +obj-y += ints_low.o obj-$(CONFIG_CMD_BOOTM) += bootm.o diff --git a/arch/arc/lib/ints_low.S b/arch/arc/lib/ints_low.S new file mode 100644 index 0000000..161cf37 --- /dev/null +++ b/arch/arc/lib/ints_low.S @@ -0,0 +1,151 @@ +/* + * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <linux/linkage.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(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) 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) * |