diff options
Diffstat (limited to 'ports/ARM7/chcore.h')
| -rw-r--r-- | ports/ARM7/chcore.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/ports/ARM7/chcore.h b/ports/ARM7/chcore.h new file mode 100644 index 000000000..2917428f3 --- /dev/null +++ b/ports/ARM7/chcore.h @@ -0,0 +1,132 @@ +/*
+ 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;
+};
+
+/*
+ * 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 *)((BYTE8 *)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
+extern void chSysLock(void);
+extern void chSysUnlock(void);
+#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) ULONG32 s[UserStackSize(n) >> 2];
+
+#ifdef 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 chSysIRQEnterI() { \
+ asm("stmfd sp!, {r0-r3, r12, lr} \n\t"); \
+}
+
+#define chSysIRQExitI() { \
+ asm("b IrqCommon \n\t"); \
+}
+#endif /* !THUMB */
+
+#ifdef THUMB
+#define chSysSwitchI chSysSwitchI_thumb
+#endif /* THUMB */
+
+/* It requires zero bytes, but better be safe.*/
+#define IDLE_THREAD_STACK_SIZE 8
+void _IdleThread(void *p) __attribute__((noreturn));
+
+void chSysHalt(void);
+void chSysSwitchI(Thread *otp, Thread *ntp);
+void chSysPuts(char *msg);
+void threadstart(void);
+
+#endif /* _CHCORE_H_ */
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