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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _CHCORE_H_
#define _CHCORE_H_
#define CH_ARCHITECTURE_AVR
/*
* Interrupt saved context.
*/
struct extctx {
uint8_t _next;
uint8_t r31;
uint8_t r30;
uint8_t r27;
uint8_t r26;
uint8_t r25;
uint8_t r24;
uint8_t r23;
uint8_t r22;
uint8_t r21;
uint8_t r20;
uint8_t r19;
uint8_t r18;
uint8_t sr;
uint8_t r1;
uint8_t r0;
uint16_t pc;
};
/*
* System saved context.
*/
struct intctx {
uint8_t _next;
uint8_t r29;
uint8_t r28;
uint8_t r17;
uint8_t r16;
uint8_t r15;
uint8_t r14;
uint8_t r13;
uint8_t r12;
uint8_t r11;
uint8_t r10;
#ifndef CH_CURRP_REGISTER_CACHE
uint8_t r9;
uint8_t r8;
#endif
uint8_t r7;
uint8_t r6;
uint8_t r5;
uint8_t r4;
uint8_t r3;
uint8_t r2;
uint8_t pcl;
uint8_t pch;
};
/*
* Port dependent part of the Thread structure, you may add fields in
* this structure.
*/
typedef struct {
struct intctx *sp;
} Context;
/**
* Platform dependent part of the \p chThdCreate() API.
*/
#define SETUP_CONTEXT(workspace, wsize, pf, arg) { \
tp->p_ctx.sp = (struct intctx*)((uint8_t *)workspace + wsize - 1 - \
(sizeof(struct intctx) - 1)); \
tp->p_ctx.sp->r2 = (int)pf; \
tp->p_ctx.sp->r3 = (int)pf >> 8; \
tp->p_ctx.sp->r4 = (int)arg; \
tp->p_ctx.sp->r5 = (int)arg >> 8; \
tp->p_ctx.sp->pcl = (int)threadstart >> 8; \
tp->p_ctx.sp->pch = (int)threadstart; \
}
#define INT_REQUIRED_STACK 8
#define StackAlign(n) (n)
#define UserStackSize(n) StackAlign(sizeof(Thread) + \
(sizeof(struct intctx) - 1) + \
(sizeof(struct extctx) - 1) + \
(n) + (INT_REQUIRED_STACK))
#define WorkingArea(s, n) uint8_t s[UserStackSize(n)];
#define chSysLock() asm volatile ("cli")
#define chSysUnlock() asm volatile ("sei")
#define chSysEnable() asm volatile ("sei")
#define chSysIRQEnterI() \
asm ("" : : : "r18", "r19", "r20", "r21", "r22", "r23", "r24", \
"r25", "r26", "r27", "r30", "r31");
#define chSysIRQExitI() { \
if (chSchRescRequiredI()) \
chSchDoRescheduleI(); \
}
#define IDLE_THREAD_STACK_SIZE 8
void _IdleThread(void *p) __attribute__((noreturn));
void chSysHalt(void) __attribute__((noreturn)) ;
void chSysSwitchI(Thread *otp, Thread *ntp);
void chSysPuts(char *msg);
void threadstart(void) __attribute__((naked));
#endif /* _CHCORE_H_ */
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