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120 lines
2.6 KiB
120 lines
2.6 KiB
/* |
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* Copyright (C) 2010 Tobias Klauser <[email protected]> |
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* Copyright (C) 2004 Microtronix Datacom Ltd. |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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*/ |
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#ifndef _ASM_NIOS2_ENTRY_H |
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#define _ASM_NIOS2_ENTRY_H |
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#ifdef __ASSEMBLY__ |
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#include <asm/processor.h> |
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#include <asm/registers.h> |
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#include <asm/asm-offsets.h> |
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/* |
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* Standard Nios2 interrupt entry and exit macros. |
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* Must be called with interrupts disabled. |
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*/ |
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.macro SAVE_ALL |
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rdctl r24, estatus |
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andi r24, r24, ESTATUS_EU |
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beq r24, r0, 1f /* In supervisor mode, already on kernel stack */ |
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movia r24, _current_thread /* Switch to current kernel stack */ |
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ldw r24, 0(r24) /* using the thread_info */ |
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addi r24, r24, THREAD_SIZE-PT_REGS_SIZE |
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stw sp, PT_SP(r24) /* Save user stack before changing */ |
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mov sp, r24 |
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br 2f |
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1 : mov r24, sp |
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addi sp, sp, -PT_REGS_SIZE /* Backup the kernel stack pointer */ |
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stw r24, PT_SP(sp) |
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2 : stw r1, PT_R1(sp) |
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stw r2, PT_R2(sp) |
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stw r3, PT_R3(sp) |
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stw r4, PT_R4(sp) |
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stw r5, PT_R5(sp) |
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stw r6, PT_R6(sp) |
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stw r7, PT_R7(sp) |
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stw r8, PT_R8(sp) |
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stw r9, PT_R9(sp) |
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stw r10, PT_R10(sp) |
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stw r11, PT_R11(sp) |
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stw r12, PT_R12(sp) |
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stw r13, PT_R13(sp) |
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stw r14, PT_R14(sp) |
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stw r15, PT_R15(sp) |
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stw r2, PT_ORIG_R2(sp) |
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stw r7, PT_ORIG_R7(sp) |
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stw ra, PT_RA(sp) |
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stw fp, PT_FP(sp) |
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stw gp, PT_GP(sp) |
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rdctl r24, estatus |
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stw r24, PT_ESTATUS(sp) |
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stw ea, PT_EA(sp) |
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.endm |
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.macro RESTORE_ALL |
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ldw r1, PT_R1(sp) /* Restore registers */ |
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ldw r2, PT_R2(sp) |
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ldw r3, PT_R3(sp) |
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ldw r4, PT_R4(sp) |
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ldw r5, PT_R5(sp) |
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ldw r6, PT_R6(sp) |
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ldw r7, PT_R7(sp) |
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ldw r8, PT_R8(sp) |
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ldw r9, PT_R9(sp) |
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ldw r10, PT_R10(sp) |
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ldw r11, PT_R11(sp) |
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ldw r12, PT_R12(sp) |
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ldw r13, PT_R13(sp) |
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ldw r14, PT_R14(sp) |
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ldw r15, PT_R15(sp) |
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ldw ra, PT_RA(sp) |
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ldw fp, PT_FP(sp) |
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ldw gp, PT_GP(sp) |
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ldw r24, PT_ESTATUS(sp) |
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wrctl estatus, r24 |
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ldw ea, PT_EA(sp) |
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ldw sp, PT_SP(sp) /* Restore sp last */ |
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.endm |
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.macro SAVE_SWITCH_STACK |
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addi sp, sp, -SWITCH_STACK_SIZE |
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stw r16, SW_R16(sp) |
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stw r17, SW_R17(sp) |
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stw r18, SW_R18(sp) |
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stw r19, SW_R19(sp) |
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stw r20, SW_R20(sp) |
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stw r21, SW_R21(sp) |
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stw r22, SW_R22(sp) |
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stw r23, SW_R23(sp) |
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stw fp, SW_FP(sp) |
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stw gp, SW_GP(sp) |
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stw ra, SW_RA(sp) |
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.endm |
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.macro RESTORE_SWITCH_STACK |
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ldw r16, SW_R16(sp) |
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ldw r17, SW_R17(sp) |
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ldw r18, SW_R18(sp) |
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ldw r19, SW_R19(sp) |
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ldw r20, SW_R20(sp) |
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ldw r21, SW_R21(sp) |
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ldw r22, SW_R22(sp) |
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ldw r23, SW_R23(sp) |
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ldw fp, SW_FP(sp) |
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ldw gp, SW_GP(sp) |
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ldw ra, SW_RA(sp) |
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addi sp, sp, SWITCH_STACK_SIZE |
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.endm |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_NIOS2_ENTRY_H */
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