diff --git a/arch/arc/cpu/arcv1/Makefile b/arch/arc/cpu/arcv1/Makefile index 3704ebeeaef6f7fe87a244a434bf960ae42aa6ad..6d17ab288686cd6085b23b4e991c0d29cf7d713a 100644 --- a/arch/arc/cpu/arcv1/Makefile +++ b/arch/arc/cpu/arcv1/Makefile @@ -4,4 +4,4 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-y += start.o +obj-y += ivt.o diff --git a/arch/arc/cpu/arcv1/ivt.S b/arch/arc/cpu/arcv1/ivt.S new file mode 100644 index 0000000000000000000000000000000000000000..7df47a2127517bae5b81909330ac1936ddf473fa --- /dev/null +++ b/arch/arc/cpu/arcv1/ivt.S @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +.section .ivt, "ax",@progbits +.align 4 +_ivt: + /* Critical system events */ + j _start /* 0 - 0x000 */ + j memory_error /* 1 - 0x008 */ + j instruction_error /* 2 - 0x010 */ + + /* Device interrupts */ +.rept 29 + j interrupt_handler /* 3:31 - 0x018:0xF8 */ +.endr + /* Exceptions */ + j EV_MachineCheck /* 0x100, Fatal Machine check (0x20) */ + j EV_TLBMissI /* 0x108, Intruction TLB miss (0x21) */ + j EV_TLBMissD /* 0x110, Data TLB miss (0x22) */ + j EV_TLBProtV /* 0x118, Protection Violation (0x23) + or Misaligned Access */ + j EV_PrivilegeV /* 0x120, Privilege Violation (0x24) */ + j EV_Trap /* 0x128, Trap exception (0x25) */ + j EV_Extension /* 0x130, Extn Intruction Excp (0x26) */ diff --git a/arch/arc/cpu/arcv2/Makefile b/arch/arc/cpu/arcv2/Makefile index cc69e5a17e1e403911ae7d6bd5497a01bd6591ec..e338a0ae560d518449d9907005f9312b79e83885 100644 --- a/arch/arc/cpu/arcv2/Makefile +++ b/arch/arc/cpu/arcv2/Makefile @@ -4,4 +4,4 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-y += start.o +obj-y += ivt.o diff --git a/arch/arc/cpu/arcv2/ivt.S b/arch/arc/cpu/arcv2/ivt.S new file mode 100644 index 0000000000000000000000000000000000000000..d110b5bba53648b7e06b4dea39f600d34259ff98 --- /dev/null +++ b/arch/arc/cpu/arcv2/ivt.S @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +.section .ivt, "a",@progbits +.align 4 + /* Critical system events */ +.word _start /* 0 - 0x000 */ +.word memory_error /* 1 - 0x008 */ +.word instruction_error /* 2 - 0x010 */ + + /* Exceptions */ +.word EV_MachineCheck /* 0x100, Fatal Machine check (0x20) */ +.word EV_TLBMissI /* 0x108, Intruction TLB miss (0x21) */ +.word EV_TLBMissD /* 0x110, Data TLB miss (0x22) */ +.word EV_TLBProtV /* 0x118, Protection Violation (0x23) + or Misaligned Access */ +.word EV_PrivilegeV /* 0x120, Privilege Violation (0x24) */ +.word EV_Trap /* 0x128, Trap exception (0x25) */ +.word EV_Extension /* 0x130, Extn Intruction Excp (0x26) */ + + /* Device interrupts */ +.rept 29 + j interrupt_handler /* 3:31 - 0x018:0xF8 */ +.endr diff --git a/arch/arc/cpu/arcv2/start.S b/arch/arc/cpu/arcv2/start.S deleted file mode 100644 index 3ce689675f590ff4fe0b4cf74e78fda9dabe671f..0000000000000000000000000000000000000000 --- a/arch/arc/cpu/arcv2/start.S +++ /dev/null @@ -1,254 +0,0 @@ -/* - * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <asm-offsets.h> -#include <config.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 weread %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 - -.section .ivt, "a",@progbits -.align 4 - /* Critical system events */ -.word _start /* 0 - 0x000 */ -.word memory_error /* 1 - 0x008 */ -.word instruction_error /* 2 - 0x010 */ - - /* Exceptions */ -.word EV_MachineCheck /* 0x100, Fatal Machine check (0x20) */ -.word EV_TLBMissI /* 0x108, Intruction TLB miss (0x21) */ -.word EV_TLBMissD /* 0x110, Data TLB miss (0x22) */ -.word EV_TLBProtV /* 0x118, Protection Violation (0x23) - or Misaligned Access */ -.word EV_PrivilegeV /* 0x120, Privilege Violation (0x24) */ -.word EV_Trap /* 0x128, Trap exception (0x25) */ -.word EV_Extension /* 0x130, Extn Intruction Excp (0x26) */ - - /* Device interrupts */ -.rept 29 - j interrupt_handler /* 3:31 - 0x018:0xF8 */ -.endr - -.text -.globl _start -_start: - /* Setup interrupt vector base that matches "__text_start" */ - sr __ivt_start, [ARC_AUX_INTR_VEC_BASE] - - /* Setup stack pointer */ - mov %sp, CONFIG_SYS_INIT_SP_ADDR - mov %fp, %sp - - /* Clear bss */ - mov %r0, __bss_start - mov %r1, __bss_end - -clear_bss: - st.ab 0, [%r0, 4] - brlt %r0, %r1, clear_bss - - /* Zero the one and only argument of "board_init_f" */ - mov_s %r0, 0 - j board_init_f - -memory_error: - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_memory_error - -instruction_error: - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_instruction_error - -interrupt_handler: - /* Todo - save and restore CPU context when interrupts will be in use */ - bl do_interrupt_handler - rtie - -EV_MachineCheck: - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_machine_check_fault - -EV_TLBMissI: - SAVE_ALL_SYS - mov %r0, %sp - j do_itlb_miss - -EV_TLBMissD: - SAVE_ALL_SYS - mov %r0, %sp - j do_dtlb_miss - -EV_TLBProtV: - SAVE_ALL_SYS - SAVE_EXCEPTION_SOURCE - mov %r1, %sp - j do_tlb_prot_violation - -EV_PrivilegeV: - SAVE_ALL_SYS - mov %r0, %sp - j do_privilege_violation - -EV_Trap: - SAVE_ALL_SYS - mov %r0, %sp - j do_trap - -EV_Extension: - SAVE_ALL_SYS - mov %r0, %sp - j do_extension - -/* - * void relocate_code (addr_sp, gd, addr_moni) - * - * This "function" does not return, instead it continues in RAM - * after relocating the monitor code. - * - * r0 = start_addr_sp - * r1 = new__gd - * r2 = relocaddr - */ -.align 4 -.globl relocate_code -relocate_code: - /* - * r0-r12 might be clobbered by C functions - * so we use r13-r16 for storage here - */ - mov %r13, %r0 /* save addr_sp */ - mov %r14, %r1 /* save addr of gd */ - mov %r15, %r2 /* save addr of destination */ - - mov %r16, %r2 /* %r9 - relocation offset */ - sub %r16, %r16, __image_copy_start - -/* Set up the stack */ -stack_setup: - mov %sp, %r13 - mov %fp, %sp - -/* Check if monitor is loaded right in place for relocation */ - mov %r0, __image_copy_start - cmp %r0, %r15 /* skip relocation if code loaded */ - bz do_board_init_r /* in target location already */ - -/* Copy data (__image_copy_start - __image_copy_end) to new location */ - mov %r1, %r15 - mov %r2, __image_copy_end - sub %r2, %r2, %r0 /* r3 <- amount of bytes to copy */ - asr %r2, %r2, 2 /* r3 <- amount of words to copy */ - mov %lp_count, %r2 - lp copy_end - ld.ab %r2,[%r0,4] - st.ab %r2,[%r1,4] -copy_end: - -/* Fix relocations related issues */ - bl do_elf_reloc_fixups -#ifndef CONFIG_SYS_ICACHE_OFF - bl invalidate_icache_all -#endif -#ifndef CONFIG_SYS_DCACHE_OFF - bl flush_dcache_all -#endif - -/* Update position of intterupt vector table */ - lr %r0, [ARC_AUX_INTR_VEC_BASE] /* Read current position */ - add %r0, %r0, %r16 /* Update address */ - sr %r0, [ARC_AUX_INTR_VEC_BASE] /* Write new position */ - -do_board_init_r: -/* Prepare for exection of "board_init_r" in relocated monitor */ - mov %r2, board_init_r /* old address of "board_init_r()" */ - add %r2, %r2, %r16 /* new address of "board_init_r()" */ - mov %r0, %r14 /* 1-st parameter: gd_t */ - mov %r1, %r15 /* 2-nd parameter: dest_addr */ - j [%r2] diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile index b8028c91e11df045b29048521631191fe7cfd180..ad66ac21e6c8ea3992d1cecae1dee0218d746c51 100644 --- a/arch/arc/lib/Makefile +++ b/arch/arc/lib/Makefile @@ -18,6 +18,7 @@ obj-y += memcpy-700.o obj-y += memset.o obj-y += reset.o obj-y += timer.o +obj-y += start.o obj-$(CONFIG_CMD_BOOTM) += bootm.o diff --git a/arch/arc/cpu/arcv1/start.S b/arch/arc/lib/start.S similarity index 82% rename from arch/arc/cpu/arcv1/start.S rename to arch/arc/lib/start.S index 01cfba493392eb40eda2c720ccf48f471a66c11f..39eace36a92366f697890f2a336a9a63aa4429a9 100644 --- a/arch/arc/cpu/arcv1/start.S +++ b/arch/arc/lib/start.S @@ -6,6 +6,7 @@ #include <asm-offsets.h> #include <config.h> +#include <linux/linkage.h> #include <asm/arcregs.h> /* @@ -88,31 +89,7 @@ #endif .endm -.section .ivt, "ax",@progbits -.align 4 -_ivt: - /* Critical system events */ - j _start /* 0 - 0x000 */ - j memory_error /* 1 - 0x008 */ - j instruction_error /* 2 - 0x010 */ - - /* Device interrupts */ -.rept 29 - j interrupt_handler /* 3:31 - 0x018:0xF8 */ -.endr - /* Exceptions */ - j EV_MachineCheck /* 0x100, Fatal Machine check (0x20) */ - j EV_TLBMissI /* 0x108, Intruction TLB miss (0x21) */ - j EV_TLBMissD /* 0x110, Data TLB miss (0x22) */ - j EV_TLBProtV /* 0x118, Protection Violation (0x23) - or Misaligned Access */ - j EV_PrivilegeV /* 0x120, Privilege Violation (0x24) */ - j EV_Trap /* 0x128, Trap exception (0x25) */ - j EV_Extension /* 0x130, Extn Intruction Excp (0x26) */ - -.text -.globl _start -_start: +ENTRY(_start) /* Setup interrupt vector base that matches "__text_start" */ sr __ivt_start, [ARC_AUX_INTR_VEC_BASE] @@ -131,60 +108,71 @@ clear_bss: /* Zero the one and only argument of "board_init_f" */ mov_s %r0, 0 j board_init_f +ENDPROC(_start) -memory_error: +ENTRY(memory_error) SAVE_ALL_SYS SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_memory_error +ENDPROC(memory_error) -instruction_error: +ENTRY(instruction_error) SAVE_ALL_SYS SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_instruction_error +ENDPROC(instruction_error) -interrupt_handler: +ENTRY(interrupt_handler) /* Todo - save and restore CPU context when interrupts will be in use */ bl do_interrupt_handler rtie +ENDPROC(interrupt_handler) -EV_MachineCheck: +ENTRY(EV_MachineCheck) SAVE_ALL_SYS SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_machine_check_fault +ENDPROC(EV_MachineCheck) -EV_TLBMissI: +ENTRY(EV_TLBMissI) SAVE_ALL_SYS mov %r0, %sp j do_itlb_miss +ENDPROC(EV_TLBMissI) -EV_TLBMissD: +ENTRY(EV_TLBMissD) SAVE_ALL_SYS mov %r0, %sp j do_dtlb_miss +ENDPROC(EV_TLBMissD) -EV_TLBProtV: +ENTRY(EV_TLBProtV) SAVE_ALL_SYS SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_tlb_prot_violation +ENDPROC(EV_TLBProtV) -EV_PrivilegeV: +ENTRY(EV_PrivilegeV) SAVE_ALL_SYS mov %r0, %sp j do_privilege_violation +ENDPROC(EV_PrivilegeV) -EV_Trap: +ENTRY(EV_Trap) SAVE_ALL_SYS mov %r0, %sp j do_trap +ENDPROC(EV_Trap) -EV_Extension: +ENTRY(EV_Extension) SAVE_ALL_SYS mov %r0, %sp j do_extension +ENDPROC(EV_Extension) /* * void relocate_code (addr_sp, gd, addr_moni) @@ -196,9 +184,7 @@ EV_Extension: * r1 = new__gd * r2 = relocaddr */ -.align 4 -.globl relocate_code -relocate_code: +ENTRY(relocate_code) /* * r0-r12 might be clobbered by C functions * so we use r13-r16 for storage here @@ -252,3 +238,4 @@ do_board_init_r: mov %r0, %r14 /* 1-st parameter: gd_t */ mov %r1, %r15 /* 2-nd parameter: dest_addr */ j [%r2] +ENDPROC(relocate_code)