+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2004, 2005, 2006, 2007 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2004 Giovanni Bajo
- *
- * -->
- *
- * \brief CPU-specific IRQ definitions.
- *
- * \author Giovanni Bajo <rasky@develer.com>
- * \author Bernardo Innocenti <bernie@develer.com>
- * \author Stefano Fedrigo <aleph@develer.com>
- * \author Francesco Sacchi <batt@develer.com>
- */
-#ifndef CPU_IRQ_H
-#define CPU_IRQ_H
-
-#include "detect.h"
-#include "types.h"
-
-#include <cfg/compiler.h> /* for uintXX_t */
-
-#if CPU_I196
- #define IRQ_DISABLE disable_interrupt()
- #define IRQ_ENABLE enable_interrupt()
-#elif CPU_X86
-
- /* Get IRQ_* definitions from the hosting environment. */
- #include <cfg/os.h>
- #if OS_EMBEDDED
- #define IRQ_DISABLE FIXME
- #define IRQ_ENABLE FIXME
- #define IRQ_SAVE_DISABLE(x) FIXME
- #define IRQ_RESTORE(x) FIXME
- #endif /* OS_EMBEDDED */
-
-#elif CPU_ARM
-
-
- #ifdef __IAR_SYSTEMS_ICC__
-
- #include <inarm.h>
-
- #if __CPU_MODE__ == 1 /* Thumb */
- /* Use stubs */
- extern cpuflags_t get_CPSR(void);
- extern void set_CPSR(cpuflags_t flags);
- #else
- #define get_CPSR __get_CPSR
- #define set_CPSR __set_CPSR
- #endif
-
- #define IRQ_DISABLE __disable_interrupt()
- #define IRQ_ENABLE __enable_interrupt()
-
- #define IRQ_SAVE_DISABLE(x) \
- do { \
- (x) = get_CPSR(); \
- __disable_interrupt(); \
- } while (0)
-
- #define IRQ_RESTORE(x) \
- do { \
- set_CPSR(x); \
- } while (0)
-
- #define IRQ_ENABLED() \
- ((bool)(get_CPSR() & 0xb0))
-
- #define BREAKPOINT /* asm("bkpt 0") DOES NOT WORK */
-
- #else /* !__IAR_SYSTEMS_ICC__ */
-
- #define IRQ_DISABLE \
- do { \
- asm volatile ( \
- "mrs r0, cpsr\n\t" \
- "orr r0, r0, #0xc0\n\t" \
- "msr cpsr_c, r0" \
- ::: "r0" \
- ); \
- } while (0)
-
- #define IRQ_ENABLE \
- do { \
- asm volatile ( \
- "mrs r0, cpsr\n\t" \
- "bic r0, r0, #0xc0\n\t" \
- "msr cpsr_c, r0" \
- ::: "r0" \
- ); \
- } while (0)
-
- #define IRQ_SAVE_DISABLE(x) \
- do { \
- asm volatile ( \
- "mrs %0, cpsr\n\t" \
- "orr r0, %0, #0xc0\n\t" \
- "msr cpsr_c, r0" \
- : "=r" (x) \
- : /* no inputs */ \
- : "r0" \
- ); \
- } while (0)
-
- #define IRQ_RESTORE(x) \
- do { \
- asm volatile ( \
- "msr cpsr_c, %0" \
- : /* no outputs */ \
- : "r" (x) \
- ); \
- } while (0)
-
- #define CPU_READ_FLAGS() \
- ({ \
- cpuflags_t sreg; \
- asm volatile ( \
- "mrs %0, cpsr\n\t" \
- : "=r" (sreg) \
- : /* no inputs */ \
- ); \
- sreg; \
- })
-
- #define IRQ_ENABLED() ((CPU_READ_FLAGS() & 0xc0) != 0xc0)
-
- /**
- * Interrupt entry point.
- * Needed because AT91 uses an Interrupt Controller with auto-vectoring.
- */
- #define IRQ_ENTRY() \
- asm volatile("sub lr, lr,#4" "\n\t" /* Adjust LR */ \
- "stmfd sp!,{r0-r12,lr}" "\n\t" /* Save registers on IRQ stack. */ \
- "mrs r1, spsr" "\n\t" /* Save SPSR */ \
- "stmfd sp!,{r1}" "\n\t") /* */
-
- /**
- * Interrupt exit.
- * Needed because AT91 uses an Interrupt Controller with auto-vectoring.
- */
- #define IRQ_EXIT() \
- asm volatile("ldmfd sp!, {r1}" "\n\t" /* Restore SPSR */ \
- "msr spsr_c, r1" "\n\t" /* */ \
- "ldr r0, =0xFFFFF000" "\n\t" /* End of interrupt. */ \
- "str r0, [r0, #0x130]" "\n\t" /* */ \
- "ldmfd sp!, {r0-r12, pc}^" "\n\t") /* Restore registers and return. */
-
-
- #endif /* !__IAR_SYSTEMS_ICC_ */
-
-#elif CPU_PPC
- #define IRQ_DISABLE FIXME
- #define IRQ_ENABLE FIXME
- #define IRQ_SAVE_DISABLE(x) FIXME
- #define IRQ_RESTORE(x) FIXME
- #define IRQ_ENABLED() FIXME
-
-#elif CPU_DSP56K
-
- #define BREAKPOINT asm(debug)
- #define IRQ_DISABLE do { asm(bfset #0x0200,SR); asm(nop); } while (0)
- #define IRQ_ENABLE do { asm(bfclr #0x0200,SR); asm(nop); } while (0)
-
- #define IRQ_SAVE_DISABLE(x) \
- do { (void)x; asm(move SR,x); asm(bfset #0x0200,SR); } while (0)
- #define IRQ_RESTORE(x) \
- do { (void)x; asm(move x,SR); } while (0)
-
- static inline bool irq_running(void)
- {
- extern void *user_sp;
- return !!user_sp;
- }
- #define IRQ_RUNNING() irq_running()
-
- static inline bool irq_enabled(void)
- {
- uint16_t x;
- asm(move SR,x);
- return !(x & 0x0200);
- }
- #define IRQ_ENABLED() irq_enabled()
-
-#elif CPU_AVR
-
- #define IRQ_DISABLE asm volatile ("cli" ::)
- #define IRQ_ENABLE asm volatile ("sei" ::)
-
- #define IRQ_SAVE_DISABLE(x) \
- do { \
- __asm__ __volatile__( \
- "in %0,__SREG__\n\t" \
- "cli" \
- : "=r" (x) : /* no inputs */ : "cc" \
- ); \
- } while (0)
-
- #define IRQ_RESTORE(x) \
- do { \
- __asm__ __volatile__( \
- "out __SREG__,%0" : /* no outputs */ : "r" (x) : "cc" \
- ); \
- } while (0)
-
- #define IRQ_ENABLED() \
- ({ \
- uint8_t sreg; \
- __asm__ __volatile__( \
- "in %0,__SREG__\n\t" \
- : "=r" (sreg) /* no inputs & no clobbers */ \
- ); \
- (bool)(sreg & 0x80); \
- })
-#else
- #error No CPU_... defined.
-#endif
-
-#ifndef IRQ_ENTRY
- #define IRQ_ENTRY() /* NOP */
-#endif
-
-#ifndef IRQ_EXIT
- #define IRQ_EXIT() /* NOP */
-#endif
-
-
-/**
- * Execute \a CODE atomically with respect to interrupts.
- *
- * \see IRQ_SAVE_DISABLE IRQ_RESTORE
- */
-#define ATOMIC(CODE) \
- do { \
- cpuflags_t __flags; \
- IRQ_SAVE_DISABLE(__flags); \
- CODE; \
- IRQ_RESTORE(__flags); \
- } while (0)
-
-
-#ifndef BREAKPOINT
-#define BREAKPOINT /* nop */
-#endif
-
-
-#endif /* CPU_IRQ_H */
projects / bertos.git / blobdiff