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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_
typedef void *regarm;
/*
* Interrupt saved context.
*/
struct extctx {
regarm spsr_irq;
regarm lr_irq;
regarm r0;
regarm r1;
regarm r2;
regarm r3;
regarm r12;
regarm lr_usr;
};
/*
* System saved context.
*/
struct intctx {
regarm r4;
regarm r5;
regarm r6;
#ifndef CH_CURRP_REGISTER_CACHE
regarm r7;
#endif
regarm r8;
regarm r9;
regarm r10;
regarm r11;
regarm lr;
};
/*
* Port dependent part of the Thread structure, you may add fields in
* this structure.
*/
typedef struct {
struct intctx *r13;
} Context;
/*
* Platform dependent part of the \p chThdCreate() API.
*/
#define SETUP_CONTEXT(workspace, wsize, pf, arg) { \
tp->p_ctx.r13 = (struct intctx *)((uint8_t *)workspace + \
wsize - \
sizeof(struct intctx)); \
tp->p_ctx.r13->r4 = pf; \
tp->p_ctx.r13->r5 = arg; \
tp->p_ctx.r13->lr = threadstart; \
}
#ifdef THUMB
#ifdef __cplusplus
extern "C" {
#endif
void chSysLock(void);
void chSysUnlock(void);
#ifdef __cplusplus
}
#endif
#else /* !THUMB */
#define chSysLock() asm("msr CPSR_c, #0x9F")
#define chSysUnlock() asm("msr CPSR_c, #0x1F")
#endif /* THUMB */
#ifdef THUMB
#define INT_REQUIRED_STACK 0x10
#else /* !THUMB */
#define INT_REQUIRED_STACK 0
#endif /* !THUMB */
#define StackAlign(n) ((((n) - 1) | 3) + 1)
#define UserStackSize(n) StackAlign(sizeof(Thread) + \
sizeof(struct intctx) + \
sizeof(struct extctx) + \
(n) + \
INT_REQUIRED_STACK)
#define WorkingArea(s, n) uint32_t s[UserStackSize(n) >> 2];
#ifdef THUMB
#define chSysSwitchI chSysSwitchI_thumb
#define chSysIRQEnterI() { \
asm(".code 32 \n\t" \
"stmfd sp!, {r0-r3, r12, lr} \n\t" \
"add r0, pc, #1 \n\t" \
"bx r0 \n\t" \
".code 16 \n\t"); \
}
#define chSysIRQExitI() { \
asm("ldr r0, =IrqCommon \n\t" \
"bx r0 \n\t"); \
}
#else /* !THUMB */
#define chSysSwitchI chSysSwitchI_arm
#define chSysIRQEnterI() { \
asm("stmfd sp!, {r0-r3, r12, lr} \n\t"); \
}
#define chSysIRQExitI() { \
asm("b IrqCommon \n\t"); \
}
#endif /* !THUMB */
/* It requires zero bytes, but better be safe.*/
#define IDLE_THREAD_STACK_SIZE 8
#ifdef __cplusplus
extern "C" {
#endif
void _IdleThread(void *p) __attribute__((noreturn));
void chSysHalt(void);
void chSysSwitchI(Thread *otp, Thread *ntp);
void chSysPuts(char *msg);
void threadstart(void);
#ifdef __cplusplus
}
#endif
#endif /* _CHCORE_H_ */
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