This file is part of SimpleRTOS2
/*============================================================================*/
/*
SimpleRTOS - Very simple RTOS for Microcontrollers - PIC32 port
v2.00 (2014-01-21)
isaacbavaresco@yahoo.com.br
*/
/*============================================================================*/
/*
Copyright (c) 2007-2014, Isaac Marino Bavaresco
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Neither the name of the author nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''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 AUTHOR 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.
*/
/*============================================================================*/
#if defined __XC32__ || defined __C32_VERSION__
/*============================================================================*/
#include <p32xxxx.h>
#include <sys/asm.h>
/*============================================================================*/
.set nomips16
.set noreorder
/*============================================================================*/
.extern Switch
.extern errno
.extern FPUOwner
/*============================================================================*/
.set noreorder
.set noat
.global SaveContext
.ent SaveContext
SaveContext: sw s0,0(sp)
lw s0,CurrentTask
sw s1,64(s0)
lw s1,0(sp)
sw s1,60(s0)
lw s1,4(sp)
sw s1,120(s0)
addiu sp,sp,8
lw s1,errno
#if defined __PIC32MZ__
sw s1,172(s0)
#else /* defined __PIC32MZ__ */
sw s1,144(s0)
#endif /* defined __PIC32MZ__ */
mfc0 s1,_CP0_CAUSE
sw s1, 124(s0)
mfc0 s1,_CP0_STATUS
sw s1, 128(s0)
mfc0 s1,_CP0_EPC
sw s1, 132(s0)
/* Here we could re-enable interrups */
sw $1, 0(s0)
sw $2, 4(s0)
sw $3, 8(s0)
sw $4, 12(s0)
sw $5, 16(s0)
sw $6, 20(s0)
sw $7, 24(s0)
sw $8, 28(s0)
sw $9, 32(s0)
sw $10, 36(s0)
sw $11, 40(s0)
sw $12, 44(s0)
sw $13, 48(s0)
sw $14, 52(s0)
sw $15, 56(s0)
/* sw $16, 60(s0) ; s0 and */
/* sw $17, 64(s0) ; s1 were already saved at the very beginning */
sw $18, 68(s0)
sw $19, 72(s0)
sw $20, 76(s0)
sw $21, 80(s0)
sw $22, 84(s0)
sw $23, 88(s0)
sw $24, 92(s0)
sw $25, 96(s0)
sw $26,100(s0)
sw $27,104(s0)
sw $28,108(s0)
sw $29,112(s0)
sw $30,116(s0)
/* sw $31,120(s0) ; Already saved */
mfhi s1,$ac0
sw s1, 136(s0)
mflo s1,$ac0
sw s1, 140(s0)
#if defined __PIC32MZ__
mfhi s1,$ac1
sw s1, 144(s0)
mflo s1,$ac1
sw s1, 148(s0)
mfhi s1,$ac2
sw s1, 152(s0)
mflo s1,$ac2
sw s1, 156(s0)
mfhi s1,$ac3
sw s1, 160(s0)
mflo s1,$ac3
sw s1, 164(s0)
rddsp s1
sw s1, 168(s0)
#endif /* defined __PIC32MZ__ */
jr ra
nop
.end SaveContext
/*============================================================================*/
.set noreorder
.set noat
.global T1Interrupt
.global RestoreContext
.ent T1Interrupt
T1Interrupt: addiu sp,sp,-8
sw ra,4(sp)
jal SaveContext
nop
/*------------------------------------------------------------*/
jal Switch
nop
/*------------------------------------------------------------*/
RestoreContext:
lw s0,CurrentTask
lw $1, 0(s0)
lw $2, 4(s0)
lw $3, 8(s0)
lw $4, 12(s0)
lw $5, 16(s0)
lw $6, 20(s0)
lw $7, 24(s0)
lw $8, 28(s0)
lw $9, 32(s0)
lw $10, 36(s0)
lw $11, 40(s0)
lw $12, 44(s0)
lw $13, 48(s0)
lw $14, 52(s0)
lw $15, 56(s0)
/* lw $16, 60(s0) ; s0 and */
/* lw $17, 64(s0) ; s1 will be restored last */
/* lw $18, 68(s0) ; s2 */
/* lw $19, 72(s0) ; s3 */
lw $20, 76(s0)
lw $21, 80(s0)
lw $22, 84(s0)
lw $23, 88(s0)
lw $24, 92(s0)
lw $25, 96(s0)
lw $26,100(s0)
lw $27,104(s0)
lw $28,108(s0)
lw $29,112(s0)
lw $30,116(s0)
lw $31,120(s0)
lw s1, 136(s0)
mthi s1,$ac0
lw s1, 140(s0)
mtlo s1,$ac0
#if defined __PIC32MZ__
lw s1, 144(s0)
mthi s1,$ac1
lw s1, 148(s0)
mtlo s1,$ac1
lw s1, 152(s0)
mthi s1,$ac2
lw s1, 156(s0)
mtlo s1,$ac2
lw s1, 160(s0)
mthi s1,$ac3
lw s1, 164(s0)
mtlo s1,$ac3
lw s1, 168(s0)
wrdsp s1
#endif /* defined __PIC32MZ__ */
/* Here we must disable interrups */
lw s1, 124(s0)
mtc0 s1,_CP0_CAUSE
#if defined __PIC32MZ__ && __PIC32_FEATURE_SET1 == 'F'
lw s2,FPUOwner
beq s0,s2,1f
lw s1, 128(s0)
ins s1,zero,29,1
1:
#else /* defined __PIC32MZ__ && __PIC32_FEATURE_SET1 == 'F' */
lw s1, 128(s0)
#endif /* defined __PIC32MZ__ && __PIC32_FEATURE_SET1 == 'F' */
mtc0 s1,_CP0_STATUS
lw s1, 132(s0)
mtc0 s1,_CP0_EPC
#if defined __PIC32MZ__
lw s1,172(s0)
#else /* defined __PIC32MZ__ */
lw s1,144(s0)
#endif /* defined __PIC32MZ__ */
la s2,errno
sw s1,(s2)
lw s3,72(s0)
lw s2,68(s0)
lw s1,64(s0)
lw s0,60(s0)
eret
/*------------------------------------------------------------*/
.end T1Interrupt
/*============================================================================*/
.extern CurrentTask
/*============================================================================*/
.global ForceYield
.ent ForceYield
ForceYield: mfc0 t0,_CP0_STATUS
ori t0,t0,2 /* Disable interrupts */
mtc0 t0,_CP0_STATUS
mtc0 ra,_CP0_EPC
/*------------------------------------------------------------*/
addiu sp,sp,-8
sw ra,4(sp)
jal SaveContext
nop
/*------------------------------------------------------------*/
lw t0,HighestReadyPriority
sll t0,t0,2
la t1,ReadyTasks
addu t1,t1,t0
lw t0,0(t1)
la t1,CurrentTask
sw t0,0(t1)
/*------------------------------------------------------------*/
j RestoreContext
nop
/*------------------------------------------------------------*/
.end ForceYield
/*============================================================================*/
#endif /* defined __XC32__ || defined __C32_VERSION__ */
/*============================================================================*/
#if defined __PIC32MZ__ && __PIC32_FEATURE_SET1 == 'F'
.global SaveFP
.ent SaveFP
SaveFP: sdc1 $f0,0(a0)
sdc1 $f1,8(a0)
sdc1 $f2,16(a0)
sdc1 $f3,24(a0)
sdc1 $f4,32(a0)
sdc1 $f5,40(a0)
sdc1 $f6,48(a0)
sdc1 $f7,56(a0)
sdc1 $f8,64(a0)
sdc1 $f9,72(a0)
sdc1 $f10,80(a0)
sdc1 $f11,88(a0)
sdc1 $f12,96(a0)
sdc1 $f13,104(a0)
sdc1 $f14,112(a0)
sdc1 $f15,120(a0)
sdc1 $f16,128(a0)
sdc1 $f17,136(a0)
sdc1 $f18,144(a0)
sdc1 $f19,152(a0)
sdc1 $f20,160(a0)
sdc1 $f21,168(a0)
sdc1 $f22,176(a0)
sdc1 $f23,184(a0)
sdc1 $f24,192(a0)
sdc1 $f25,200(a0)
sdc1 $f26,208(a0)
sdc1 $f27,216(a0)
sdc1 $f28,224(a0)
sdc1 $f29,232(a0)
sdc1 $f30,240(a0)
sdc1 $f31,248(a0)
cfc1 a1, $f31
sw a1,256(a0)
jr ra
nop
.end SaveFP
/*============================================================================*/
.global RestoreFP
.ent RestoreFP
RestoreFP: lw a1,256(a0)
ctc1 a1, $f31
ldc1 $f31,248(a0)
ldc1 $f30,240(a0)
ldc1 $f29,232(a0)
ldc1 $f28,224(a0)
ldc1 $f27,216(a0)
ldc1 $f26,208(a0)
ldc1 $f25,200(a0)
ldc1 $f24,192(a0)
ldc1 $f23,184(a0)
ldc1 $f22,176(a0)
ldc1 $f21,168(a0)
ldc1 $f20,160(a0)
ldc1 $f19,152(a0)
ldc1 $f18,144(a0)
ldc1 $f17,136(a0)
ldc1 $f16,128(a0)
ldc1 $f15,120(a0)
ldc1 $f14,112(a0)
ldc1 $f13,104(a0)
ldc1 $f12,96(a0)
ldc1 $f11,88(a0)
ldc1 $f10,80(a0)
ldc1 $f9,72(a0)
ldc1 $f8,64(a0)
ldc1 $f7,56(a0)
ldc1 $f6,48(a0)
ldc1 $f5,40(a0)
ldc1 $f4,32(a0)
ldc1 $f3,24(a0)
ldc1 $f2,16(a0)
ldc1 $f1,8(a0)
ldc1 $f0,0(a0)
jr ra
nop
.end RestoreFP
#endif /* defined __PIC32MZ__ && __PIC32_FEATURE_SET1 == 'F' */
/*============================================================================*/
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