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