| 1 | |
| 2 | * Copyright (C) 2010 Tobias Klauser <[email protected]>
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| 3 | * Copyright (C) 2004 Microtronix Datacom Ltd.
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| 4 | *
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| 5 | * This file is subject to the terms and conditions of the GNU General Public
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| 6 | * License. See the file "COPYING" in the main directory of this archive
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| 7 | * for more details.
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| 8 |
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| 9 |
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| 10 | #ifndef _ASM_NIOS2_ENTRY_H
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| 11 | #define _ASM_NIOS2_ENTRY_H
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| 12 |
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| 13 | #ifdef __ASSEMBLER__
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| 14 |
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| 15 | #include <asm/processor.h>
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| 16 | #include <asm/registers.h>
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| 17 | #include <asm/asm-offsets.h>
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| 18 |
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| 19 | |
| 20 | * Standard Nios2 interrupt entry and exit macros.
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| 21 | * Must be called with interrupts disabled.
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| 22 |
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| 23 | .macro SAVE_ALL
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| 24 | rdctl r24, estatus
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| 25 | andi r24, r24, ESTATUS_EU
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| 26 | beq r24, r0, 1f
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| 27 |
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| 28 | movia r24, _current_thread
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| 29 | ldw r24, 0(r24)
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| 30 | addi r24, r24, THREAD_SIZE-PT_REGS_SIZE
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| 31 | stw sp, PT_SP(r24)
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| 32 | mov sp, r24
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| 33 | br 2f
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| 34 |
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| 35 | 1 : mov r24, sp
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| 36 | addi sp, sp, -PT_REGS_SIZE
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| 37 | stw r24, PT_SP(sp)
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| 38 | 2 : stw r1, PT_R1(sp)
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| 39 | stw r2, PT_R2(sp)
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| 40 | stw r3, PT_R3(sp)
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| 41 | stw r4, PT_R4(sp)
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| 42 | stw r5, PT_R5(sp)
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| 43 | stw r6, PT_R6(sp)
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| 44 | stw r7, PT_R7(sp)
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| 45 | stw r8, PT_R8(sp)
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| 46 | stw r9, PT_R9(sp)
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| 47 | stw r10, PT_R10(sp)
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| 48 | stw r11, PT_R11(sp)
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| 49 | stw r12, PT_R12(sp)
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| 50 | stw r13, PT_R13(sp)
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| 51 | stw r14, PT_R14(sp)
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| 52 | stw r15, PT_R15(sp)
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| 53 | movi r24, -1
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| 54 | stw r24, PT_ORIG_R2(sp)
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| 55 | stw r7, PT_ORIG_R7(sp)
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| 56 |
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| 57 | stw ra, PT_RA(sp)
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| 58 | stw fp, PT_FP(sp)
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| 59 | stw gp, PT_GP(sp)
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| 60 | rdctl r24, estatus
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| 61 | stw r24, PT_ESTATUS(sp)
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| 62 | stw ea, PT_EA(sp)
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| 63 | .endm
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| 64 |
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| 65 | .macro RESTORE_ALL
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| 66 | ldw r1, PT_R1(sp)
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| 67 | ldw r2, PT_R2(sp)
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| 68 | ldw r3, PT_R3(sp)
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| 69 | ldw r4, PT_R4(sp)
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| 70 | ldw r5, PT_R5(sp)
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| 71 | ldw r6, PT_R6(sp)
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| 72 | ldw r7, PT_R7(sp)
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| 73 | ldw r8, PT_R8(sp)
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| 74 | ldw r9, PT_R9(sp)
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| 75 | ldw r10, PT_R10(sp)
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| 76 | ldw r11, PT_R11(sp)
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| 77 | ldw r12, PT_R12(sp)
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| 78 | ldw r13, PT_R13(sp)
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| 79 | ldw r14, PT_R14(sp)
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| 80 | ldw r15, PT_R15(sp)
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| 81 | ldw ra, PT_RA(sp)
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| 82 | ldw fp, PT_FP(sp)
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| 83 | ldw gp, PT_GP(sp)
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| 84 | ldw r24, PT_ESTATUS(sp)
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| 85 | wrctl estatus, r24
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| 86 | ldw ea, PT_EA(sp)
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| 87 | ldw sp, PT_SP(sp)
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| 88 | .endm
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| 89 |
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| 90 | .macro SAVE_SWITCH_STACK
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| 91 | addi sp, sp, -SWITCH_STACK_SIZE
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| 92 | stw r16, SW_R16(sp)
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| 93 | stw r17, SW_R17(sp)
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| 94 | stw r18, SW_R18(sp)
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| 95 | stw r19, SW_R19(sp)
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| 96 | stw r20, SW_R20(sp)
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| 97 | stw r21, SW_R21(sp)
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| 98 | stw r22, SW_R22(sp)
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| 99 | stw r23, SW_R23(sp)
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| 100 | stw fp, SW_FP(sp)
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| 101 | stw gp, SW_GP(sp)
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| 102 | stw ra, SW_RA(sp)
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| 103 | .endm
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| 104 |
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| 105 | .macro RESTORE_SWITCH_STACK
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| 106 | ldw r16, SW_R16(sp)
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| 107 | ldw r17, SW_R17(sp)
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| 108 | ldw r18, SW_R18(sp)
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| 109 | ldw r19, SW_R19(sp)
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| 110 | ldw r20, SW_R20(sp)
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| 111 | ldw r21, SW_R21(sp)
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| 112 | ldw r22, SW_R22(sp)
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| 113 | ldw r23, SW_R23(sp)
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| 114 | ldw fp, SW_FP(sp)
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| 115 | ldw gp, SW_GP(sp)
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| 116 | ldw ra, SW_RA(sp)
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| 117 | addi sp, sp, SWITCH_STACK_SIZE
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| 118 | .endm
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| 119 |
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| 120 | #endif
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| 121 | #endif
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