Added Multithreading support to the cc65 targets based on the Contiki 1.x C64 implementation with the following changes:

- Added support for the function parameter.
- Removed support for preemption because:
  - No other current implementation does so.
  - Preemption support would make the code at least target-dependent or it wouldn't work at all (as on plain Apple2 machines without timer interrupt).
This commit is contained in:
oliverschmidt 2007-04-21 22:15:45 +00:00
parent f023e03976
commit 8d3496194f
4 changed files with 353 additions and 5 deletions

View file

@ -1,3 +1,4 @@
#
# Copyright (c) 2007, Adam Dunkels.
# All rights reserved.
#
@ -29,7 +30,7 @@
#
# Author: Oliver Schmidt <ol.sc@web.de>
#
# $Id: Makefile.6502,v 1.6 2007/04/21 15:04:23 oliverschmidt Exp $
# $Id: Makefile.6502,v 1.7 2007/04/21 22:15:45 oliverschmidt Exp $
#
ifndef CONTIKI
@ -53,7 +54,7 @@ CONTIKI_CPU_DIRS = . net sys
CONTIKI_TARGET_MAIN = ${addprefix $(OBJECTDIR)/,contiki-main.o}
CONTIKI_TARGET_SOURCEFILES = contiki-main.c
CONTIKI_CPU_SOURCEFILES = lc-asm.S uip_arch.c
CONTIKI_CPU_SOURCEFILES = mtarch.c mtarch-asm.S lc-asm.S uip_arch.c
CONTIKI_SOURCEFILES += $(CONTIKI_CPU_SOURCEFILES) $(CONTIKI_TARGET_SOURCEFILES)

214
cpu/6502/mtarch-asm.S Normal file
View file

@ -0,0 +1,214 @@
;
; Copyright (c) 2004, Adam Dunkels.
; All rights reserved.
;
; 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.
; 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
;
; This file is part of the Contiki operating system.
;
; Author: Adam Dunkels <adam@sics.se>
;
; $Id: mtarch-asm.S,v 1.1 2007/04/21 22:15:45 oliverschmidt Exp $
;
;---------------------------------------------------------------------
.importzp ptr1
.importzp sp
.import __ZP_START__
.import _mtarch_asm_threadspreg
.import _mtarch_asm_threadsp
.import _mtarch_asm_threadzp
.import _mtarch_asm_threadstack
.export _mtarch_asm_start
.export _mtarch_asm_yield
.export _mtarch_asm_exec
;---------------------------------------------------------------------
.bss
kernelsp: .res 2
kernelspreg: .res 1
zpsize = 32
;---------------------------------------------------------------------
.code
; Switch to thread defined by threadsp, threadstack and threadspreg.
; The kernel stack is swapped onto the threadstack, and the
; sp and spreg are saved to the local variables "kernelsp" and
; "kernelspreg". Also, the zeropage variables are saved.
_mtarch_asm_exec:
sei
; Save current stack pointer
lda sp
sta kernelsp
lda sp+1
sta kernelsp+1
tsx
stx kernelspreg
lda _mtarch_asm_threadzp
sta ptr1
lda _mtarch_asm_threadzp+1
sta ptr1+1
ldy #0
: lda <__ZP_START__,y
tax
lda (ptr1),y
sta <__ZP_START__,y
txa
sta (ptr1),y
iny
cpy #zpsize
bne :-
lda _mtarch_asm_threadstack
sta ptr1
lda _mtarch_asm_threadstack+1
sta ptr1+1
ldy kernelspreg ; Determine the smallest of the two stack pointers,
cpy _mtarch_asm_threadspreg ; as we only need to swap the used part of the stack.
bcc :+
ldy _mtarch_asm_threadspreg
: lda $0100,y
tax
lda (ptr1),y
sta $0100,y
txa
sta (ptr1),y
iny
bne :-
lda _mtarch_asm_threadsp
sta sp
lda _mtarch_asm_threadsp+1
sta sp+1
ldx _mtarch_asm_threadspreg
txs
pla
tay
pla
tax
pla
rti
;---------------------------------------------------------------------
; Switch from thread defined by threadsp, threadstack and threadspreg.
; The kernel stack is swapped back from the threadstack, and the
; sp and spreg are restored from the local variables "kernelsp" and
; "kernelspreg".
_mtarch_asm_yield:
php
pha
txa
pha
tya
pha
sei
tsx ; The rts adds 1 to the PC
; saved on the stack. We want
lda $0105,x ; the stack to look like is would
clc ; do inside of an interrupt
adc #1 ; (this is what the 'rts' does,
sta $0105,x ; but not the 'rti').
lda $0106,x
adc #0
sta $0106,x
lda sp
sta _mtarch_asm_threadsp
lda sp+1
sta _mtarch_asm_threadsp+1
tsx
stx _mtarch_asm_threadspreg
lda _mtarch_asm_threadzp
sta ptr1
lda _mtarch_asm_threadzp+1
sta ptr1+1
ldy kernelspreg ; Determine the smallest of the two stack pointers,
cpy _mtarch_asm_threadspreg ; as we only need to swap the used part of the stack.
bcc :+
ldy _mtarch_asm_threadspreg
: lda <__ZP_START__,y
tax
lda (ptr1),y
sta <__ZP_START__,y
txa
sta (ptr1),y
iny
cpy #zpsize
bne :-
lda _mtarch_asm_threadstack
sta ptr1
lda _mtarch_asm_threadstack+1
sta ptr1+1
ldy #0
: lda $0100,y
tax
lda (ptr1),y
sta $0100,y
txa
sta (ptr1),y
iny
bne :-
lda kernelsp
sta sp
lda kernelsp+1
sta sp+1
ldx kernelspreg
txs
cli
rts
;---------------------------------------------------------------------
_mtarch_asm_start:
lda _mtarch_asm_threadzp
sta ptr1
lda _mtarch_asm_threadzp+1
sta ptr1+1
ldy #0
: lda <__ZP_START__,y
sta (ptr1),y
iny
cpy #zpsize
bne :-
rts
;---------------------------------------------------------------------

123
cpu/6502/mtarch.c Normal file
View file

@ -0,0 +1,123 @@
/*
* Copyright (c) 2004, Adam Dunkels.
* All rights reserved.
*
* 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.
* 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: mtarch.c,v 1.1 2007/04/21 22:15:45 oliverschmidt Exp $
*/
#include <string.h>
#include "mtarch.h"
unsigned char mtarch_asm_threadspreg;
unsigned char *mtarch_asm_threadsp;
unsigned char *mtarch_asm_threadzp;
unsigned char *mtarch_asm_threadstack;
void mtarch_asm_start(void);
void mtarch_asm_yield(void);
void mtarch_asm_exec(void);
/*--------------------------------------------------------------------------*/
void
mtarch_init(void)
{
}
/*--------------------------------------------------------------------------*/
void
mtarch_remove(void)
{
}
/*--------------------------------------------------------------------------*/
void
mtarch_start(struct mtarch_thread *thread,
void (* function)(void *data),
void *data)
{
memset(thread->cpustack, 0, sizeof(thread->cpustack));
memset(thread->cstack, 0, sizeof(thread->cstack));
/* Create a CPU stack frame with the appropriate values. */
thread->cpustack[MTARCH_CPUSTACKSIZE - 2] = ((unsigned short)function) / 0x100; /* high byte of return address */
thread->cpustack[MTARCH_CPUSTACKSIZE - 3] = ((unsigned short)function) % 0x100; /* low byte of return address */
thread->cpustack[MTARCH_CPUSTACKSIZE - 4] = 0x21; /* processor flags */
thread->cpustack[MTARCH_CPUSTACKSIZE - 5] = /* a register */
thread->cpustack[MTARCH_CPUSTACKSIZE - 6] = /* x register */
thread->cpustack[MTARCH_CPUSTACKSIZE - 7] = 0x00; /* y register */
thread->spreg = MTARCH_CPUSTACKSIZE - 8;
/* Setup the C stack with the data pointer. */
thread->cstack[MTARCH_CPUSTACKSIZE - 2] = ((unsigned short)data) / 0x100; /* high byte of data pointer */
thread->cstack[MTARCH_CPUSTACKSIZE - 3] = ((unsigned short)data) % 0x100; /* low byte of data pointer */
thread->sp = &thread->cstack[MTARCH_CSTACKSIZE - 3];
mtarch_asm_threadzp = &(thread->zp);
mtarch_asm_start();
}
/*--------------------------------------------------------------------------*/
void
mtarch_yield(void)
{
mtarch_asm_yield();
}
/*--------------------------------------------------------------------------*/
void
mtarch_exec(struct mtarch_thread *thread)
{
/* Switch processor stack. The call to mtarch_asm_switch() will not
return until the process that we switch to calls yield(). */
mtarch_asm_threadspreg = thread->spreg;
mtarch_asm_threadsp = thread->sp;
mtarch_asm_threadstack = &(thread->cpustack[0]);
mtarch_asm_threadzp = &(thread->zp[0]);
mtarch_asm_exec();
thread->sp = mtarch_asm_threadsp;
thread->spreg = mtarch_asm_threadspreg;
}
/*--------------------------------------------------------------------------*/
void
mtarch_stop(struct mtarch_thread *thread)
{
}
/*--------------------------------------------------------------------------*/
void
mtarch_pstart(void)
{
}
/*--------------------------------------------------------------------------*/
void
mtarch_pstop(void)
{
}
/*--------------------------------------------------------------------------*/

View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2007, Swedish Institute of Computer Science.
* Copyright (c) 2004, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -28,14 +28,24 @@
*
* This file is part of the Contiki operating system.
*
* $Id: mtarch.h,v 1.1 2007/04/18 21:38:55 oliverschmidt Exp $
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: mtarch.h,v 1.2 2007/04/21 22:15:45 oliverschmidt Exp $
*/
#ifndef __MTARCH_H__
#define __MTARCH_H__
#define MTARCH_CPUSTACKSIZE 256
#define MTARCH_CSTACKSIZE 256
#define MTARCH_ZPSIZE 32
struct mtarch_thread {
unsigned char dummy;
unsigned char spreg;
unsigned char *sp;
unsigned char cpustack[MTARCH_CPUSTACKSIZE];
unsigned char cstack [MTARCH_CSTACKSIZE];
unsigned char zp [MTARCH_ZPSIZE];
};
#endif /* __MTARCH_H__ */