/* SPDX-License-Identifier: BSD-2-Clause */
/*
* COPYRIGHT (c) 2014 Hesham ALMatary <heshamelmatary@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/asm.h>
#include <rtems/score/cpu.h>
.section .text
PUBLIC(_CPU_Context_validate)
SYM(_CPU_Context_validate):
l.addi r1, r1, -140
l.sw 8(r1), r2
l.sw 12(r1), r3
l.sw 16(r1), r4
l.sw 20(r1), r5
l.sw 24(r1), r6
l.sw 28(r1), r7
l.sw 32(r1), r8
l.sw 36(r1), r9
l.sw 40(r1), r10
l.sw 44(r1), r11
l.sw 48(r1), r12
l.sw 52(r1), r13
l.sw 56(r1), r14
l.sw 60(r1), r15
l.sw 64(r1), r16
l.sw 68(r1), r17
l.sw 72(r1), r18
l.sw 76(r1), r19
l.sw 80(r1), r20
l.sw 84(r1), r21
l.sw 88(r1), r22
l.sw 92(r1), r23
l.sw 96(r1), r24
l.sw 100(r1), r25
l.sw 104(r1), r26
l.sw 108(r1), r27
l.sw 112(r1), r28
l.sw 116(r1), r29
l.sw 120(r1), r30
l.sw 124(r1), r31
/* Fill */
/* r13 is used for temporary values */
l.add r13, r0, r0
/* r31 contains the stack pointer */
l.add r31, r1, r0
.macro fill_register reg
l.addi r13, r13, 1
l.addi \reg, r13, 0
.endm
fill_register r2
fill_register r3
fill_register r4
fill_register r5
fill_register r6
fill_register r7
fill_register r8
fill_register r9
fill_register r10
fill_register r11
fill_register r12
fill_register r13
fill_register r14
fill_register r15
fill_register r16
fill_register r17
fill_register r18
fill_register r19
fill_register r20
fill_register r21
fill_register r22
fill_register r23
fill_register r24
fill_register r25
fill_register r26
fill_register r27
fill_register r28
fill_register r29
fill_register r30
fill_register r31
/* Check */
check:
.macro check_register reg
l.addi r13, r13, 1
l.sfne \reg, r13
l.bf restore
l.nop
.endm
l.sfne r31, r1
l.bf restore
l.nop
l.addi r13, r0, 0
check_register r2
check_register r3
check_register r4
check_register r5
check_register r6
check_register r7
check_register r8
check_register r9
check_register r10
check_register r11
check_register r12
check_register r13
check_register r14
check_register r15
check_register r16
check_register r17
check_register r18
check_register r19
check_register r20
check_register r21
check_register r22
check_register r23
check_register r24
check_register r25
check_register r26
check_register r27
check_register r28
check_register r29
check_register r30
check_register r31
l.j check
l.nop
/* Restore */
restore:
l.lwz r2, 8(r1)
l.lwz r3, 12(r1)
l.lwz r4, 16(r1)
l.lwz r5, 20(r1)
l.lwz r6, 24(r1)
l.lwz r7, 28(r1)
l.lwz r8, 32(r1)
l.lwz r9, 36(r1)
l.lwz r10, 40(r1)
l.lwz r11, 44(r1)
l.lwz r12, 48(r1)
l.lwz r13, 52(r1)
l.lwz r14, 56(r1)
l.lwz r15, 60(r1)
l.lwz r16, 64(r1)
l.lwz r17, 68(r1)
l.lwz r18, 72(r1)
l.lwz r19, 76(r1)
l.lwz r20, 80(r1)
l.lwz r21, 84(r1)
l.lwz r22, 88(r1)
l.lwz r23, 92(r1)
l.lwz r24, 96(r1)
l.lwz r25, 100(r1)
l.lwz r26, 104(r1)
l.lwz r27, 108(r1)
l.lwz r28, 112(r1)
l.lwz r29, 116(r1)
l.lwz r30, 120(r1)
l.lwz r31, 124(r1)
l.addi r1, r1, 140
l.jr r9
l.nop
