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74 lines
2.3 KiB
ArmAsm
74 lines
2.3 KiB
ArmAsm
/*
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* Copyright (c) 2011, Anup Patel for Atomthreads Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. No personal names or organizations' names associated with the
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* Atomthreads project may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ATOMTHREADS PROJECT AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <arm_asm_macro.h>
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.section .text
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/**
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* int archSetJump(pt_regs_t *regs)
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*/
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.globl archSetJump
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archSetJump:
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add r0, r0, #(4 * 16)
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str lr, [r0]
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sub r0, r0, #(4 * 14)
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stm r0, {r1-r14}
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mov r0, r0 /* NOP */
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str r2, [r1]
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mov r2, #0
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sub r0, r0, #4
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str r2, [r0]
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mrs r2, cpsr_all
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sub r0, r0, #4
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str r2, [r0]
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ldr r2, [r1]
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mov r0, #1
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bx lr
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/**
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* void archLongJump(pt_regs_t *regs)
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*/
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.globl archLongJump
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archLongJump:
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mrs r1, cpsr_all
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SET_CURRENT_MODE CPSR_MODE_IRQ
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mov sp, r0
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SET_CURRENT_MODE CPSR_MODE_FIQ
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mov sp, r0
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msr cpsr_all, r1
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ldr r1, [r0], #4 /* Get CPSR from stack */
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orr r2, r1, #(CPSR_IRQ_DISABLED | CPSR_FIQ_DISABLED)
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msr cpsr_all, r2
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msr spsr_all, r1
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ldm r0, {r0-r15}^
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mov r0, r0 /* NOP */
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