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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_ARMCM3
typedef void *regarm;
/*
* Port-related configuration parameters.
*/
#define BASEPRI_USER 0 /* User level BASEPRI, 0 = disabled. */
#define BASEPRI_KERNEL 0x10 /* BASEPRI level within kernel lock. */
#define ENABLE_WFI_IDLE 0 /* Enables the use of the WFI ins. */
/*
* Interrupt saved context, empty in this architecture.
*/
struct extctx {
};
/*
* System saved context.
*/
struct intctx {
regarm basepri;
regarm r4;
regarm r5;
regarm r6;
#ifndef CH_CURRP_REGISTER_CACHE
regarm r7;
#endif
regarm r8;
regarm r9;
regarm r10;
regarm r11;
regarm lr_exc;
regarm r0;
regarm r1;
regarm r2;
regarm r3;
regarm r12;
regarm lr_thd;
regarm pc;
regarm xpsr;
};
/*
* 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.
*
* The top of the workspace is used for the intctx datastructure.
*
*/
#define SETUP_CONTEXT(workspace, wsize, pf, arg) { \
tp->p_ctx.r13 = (struct intctx *)((uint8_t *)workspace + \
wsize - \
sizeof(struct intctx)); \
tp->p_ctx.r13->basepri = BASEPRI_USER; \
tp->p_ctx.r13->lr_exc = (regarm)0xFFFFFFFD; \
tp->p_ctx.r13->r0 = arg; \
tp->p_ctx.r13->r1 = pf; \
tp->p_ctx.r13->pc = threadstart; \
tp->p_ctx.r13->xpsr = (regarm)0x01000000; \
}
#define chSysLock() { \
register uint32_t tmp asm ("r3") = BASEPRI_KERNEL; \
asm volatile ("msr BASEPRI, %0" : : "r" (tmp)); \
}
#define chSysUnlock() { \
register uint32_t tmp asm ("r3") = BASEPRI_USER; \
asm volatile ("msr BASEPRI, %0" : : "r" (tmp)); \
}
#define chSysSwitchI(otp, ntp) { \
register Thread *_otp asm ("r0") = (otp); \
register Thread *_ntp asm ("r1") = (ntp); \
asm volatile ("svc #0" : : "r" (_otp), "r" (_ntp)); \
}
#define INT_REQUIRED_STACK 0
#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];
/* called on each interrupt entry, currently nothing is done */
#define chSysIRQEnterI()
/* called on each interrupt exit, pends a supervisor handler for
* execution after all higher priority interrupts; PendSVVector() */
#define chSysIRQExitI() { \
SCB_ICSR = ICSR_PENDSVSET; \
}
#define IDLE_THREAD_STACK_SIZE 0
void _IdleThread(void *p) __attribute__((noreturn));
void chSysHalt(void);
void chSysPuts(char *msg);
void threadstart(void);
#endif /* _CHCORE_H_ */
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