diff options
Diffstat (limited to 'os/ports/common/MSP430X/chcore.h')
| -rw-r--r-- | os/ports/common/MSP430X/chcore.h | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/os/ports/common/MSP430X/chcore.h b/os/ports/common/MSP430X/chcore.h new file mode 100644 index 000000000..b6f1dd9c9 --- /dev/null +++ b/os/ports/common/MSP430X/chcore.h @@ -0,0 +1,316 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011,2012 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/>.
+*/
+
+/**
+ * @file MSP430/chcore.h
+ * @brief MSP430 architecture port macros and structures.
+ *
+ * @addtogroup MSP430_CORE
+ * @{
+ */
+
+#ifndef _CHCORE_H_
+#define _CHCORE_H_
+
+#include <intrinsics.h>
+#include "chtypes.h"
+
+#if CH_DBG_ENABLE_STACK_CHECK
+#error "option CH_DBG_ENABLE_STACK_CHECK not supported by this port"
+#endif
+
+/**
+ * @brief Enables the use of a wait state in the idle thread loop.
+ */
+#ifndef ENABLE_WFI_IDLE
+#define ENABLE_WFI_IDLE 0
+#endif
+
+/**
+ * @brief Macro defining the MSP430 architecture.
+ */
+#define CH_ARCHITECTURE_MSP430
+
+/**
+ * @brief Name of the implemented architecture.
+ */
+#define CH_ARCHITECTURE_NAME "MSP430"
+
+/**
+ * @brief Name of the architecture variant (optional).
+ */
+#define CH_CORE_VARIANT_NAME "MSP430X"
+
+/**
+ * @brief Name of the compiler supported by this port.
+ */
+#if defined(__IAR_SYSTEMS_ICC__)
+#define CH_COMPILER_NAME __VERSION__
+#elif defined(__GNUC__)
+#define CH_COMPILER_NAME "GCC "__VERSION__
+#else
+#error "Unsupported compiler in use."
+#endif
+
+/**
+ * @brief Port-specific information string.
+ */
+#define CH_PORT_INFO "None"
+
+/**
+ * @brief 16 bits stack and memory alignment enforcement.
+ */
+typedef uint16_t stkalign_t;
+
+/**
+ * @brief Generic MSP430 register.
+ */
+typedef void *regmsp_t;
+
+/**
+ * @brief Interrupt saved context.
+ * @details This structure represents the stack frame saved during a
+ * preemption-capable interrupt handler.
+ */
+struct extctx {
+ regmsp_t r12;
+ regmsp_t r13;
+ regmsp_t r14;
+ regmsp_t r15;
+ regmsp_t sr;
+ regmsp_t pc;
+};
+
+/**
+ * @brief System saved context.
+ * @details This structure represents the inner stack frame during a context
+ * switching.
+ */
+struct intctx {
+ regmsp_t r4;
+ regmsp_t r5;
+ regmsp_t r6;
+ regmsp_t r7;
+ regmsp_t r8;
+ regmsp_t r9;
+ regmsp_t r10;
+ regmsp_t r11;
+ regmsp_t pc;
+};
+
+/**
+ * @brief Platform dependent part of the @p Thread structure.
+ * @details This structure usually contains just the saved stack pointer
+ * defined as a pointer to a @p intctx structure.
+ */
+struct context {
+ struct intctx *sp;
+};
+
+/**
+ * @brief Platform dependent part of the @p chThdCreateI() API.
+ * @details This code usually setup the context switching frame represented
+ * by an @p intctx structure.
+ */
+#define SETUP_CONTEXT(workspace, wsize, pf, arg) { \
+ tp->p_ctx.sp = (struct intctx *)((uint8_t *)workspace + \
+ wsize - \
+ sizeof(struct intctx)); \
+ tp->p_ctx.sp->r10 = (regmsp_t)pf; \
+ tp->p_ctx.sp->r11 = arg; \
+ tp->p_ctx.sp->pc = (regmsp_t)_port_thread_start; \
+}
+
+/**
+ * @brief Stack size for the system idle thread.
+ * @details This size depends on the idle thread implementation, usually
+ * the idle thread should take no more space than those reserved
+ * by @p PORT_INT_REQUIRED_STACK.
+ */
+#ifndef PORT_IDLE_THREAD_STACK_SIZE
+#define PORT_IDLE_THREAD_STACK_SIZE 0
+#endif
+
+/**
+ * @brief Per-thread stack overhead for interrupts servicing.
+ * @details This constant is used in the calculation of the correct working
+ * area size.
+ * This value can be zero on those architecture where there is a
+ * separate interrupt stack and the stack space between @p intctx and
+ * @p extctx is known to be zero.
+ * @note In this port the default is 32 bytes per thread.
+ */
+#ifndef PORT_INT_REQUIRED_STACK
+#define PORT_INT_REQUIRED_STACK 32
+#endif
+
+/**
+ * @brief Enforces a correct alignment for a stack area size value.
+ */
+#define STACK_ALIGN(n) ((((n) - 1) | (sizeof(stkalign_t) - 1)) + 1)
+
+/**
+ * @brief Computes the thread working area global size.
+ */
+#define THD_WA_SIZE(n) STACK_ALIGN(sizeof(Thread) + \
+ sizeof(struct intctx) + \
+ sizeof(struct extctx) + \
+ (n) + (PORT_INT_REQUIRED_STACK))
+
+/**
+ * @brief Static working area allocation.
+ * @details This macro is used to allocate a static thread working area
+ * aligned as both position and size.
+ */
+#define WORKING_AREA(s, n) stkalign_t s[THD_WA_SIZE(n) / sizeof(stkalign_t)]
+
+/**
+ * @brief IRQ prologue code.
+ * @details This macro must be inserted at the start of all IRQ handlers
+ * enabled to invoke system APIs.
+ */
+#define PORT_IRQ_PROLOGUE()
+
+/**
+ * @brief IRQ epilogue code.
+ * @details This macro must be inserted at the end of all IRQ handlers
+ * enabled to invoke system APIs.
+ */
+#define PORT_IRQ_EPILOGUE() { \
+ dbg_check_lock(); \
+ if (chSchIsPreemptionRequired()) \
+ chSchDoReschedule(); \
+ dbg_check_unlock(); \
+}
+
+#define ISRNAME(pre, id) pre##id
+
+/**
+ * @brief IRQ handler function declaration.
+ * @note @p id can be a function name or a vector number depending on the
+ * port implementation.
+ */
+#if defined(__IAR_SYSTEMS_ICC__)
+#define STRINGVECTOR(x) #x
+#define VECTOR_ID(x) STRINGVECTOR( vector=x##_VECTOR )
+#define PORT_IRQ_HANDLER(id) \
+_Pragma( VECTOR_ID(id) ) \
+__interrupt void ISRNAME(vect,id)(void)
+#else
+//#define PORT_IRQ_HANDLER(id) ISR(id,vect##id)
+#define PORT_IRQ_HANDLER(id) void __attribute__((__interrupt__ (id##_VECTOR))) ISRNAME(vect,id)(void)
+#endif
+
+/**
+ * @brief Port-related initialization code.
+ * @note This function is empty in this port.
+ */
+#define port_init()
+
+/**
+ * @brief Kernel-lock action.
+ * @details Usually this function just disables interrupts but may perform more
+ * actions.
+ * @note Implemented as global interrupt disable.
+ */
+#define port_lock() __disable_interrupt()
+
+/**
+ * @brief Kernel-unlock action.
+ * @details Usually this function just enables interrupts but may perform more
+ * actions.
+ * @note Implemented as global interrupt enable.
+ */
+#define port_unlock() __enable_interrupt()
+
+/**
+ * @brief Kernel-lock action from an interrupt handler.
+ * @details This function is invoked before invoking I-class APIs from
+ * interrupt handlers. The implementation is architecture dependent,
+ * in its simplest form it is void.
+ * @note This function is empty in this port.
+ */
+#define port_lock_from_isr()
+
+/**
+ * @brief Kernel-unlock action from an interrupt handler.
+ * @details This function is invoked after invoking I-class APIs from interrupt
+ * handlers. The implementation is architecture dependent, in its
+ * simplest form it is void.
+ * @note This function is empty in this port.
+ */
+#define port_unlock_from_isr()
+
+/**
+ * @brief Disables all the interrupt sources.
+ * @note Of course non-maskable interrupt sources are not included.
+ * @note Implemented as global interrupt disable.
+ */
+#define port_disable() __disable_interrupt()
+
+/**
+ * @brief Disables the interrupt sources below kernel-level priority.
+ * @note Interrupt sources above kernel level remains enabled.
+ * @note Same as @p port_disable() in this port, there is no difference
+ * between the two states.
+ */
+#define port_suspend() __disable_interrupt()
+
+/**
+ * @brief Enables all the interrupt sources.
+ * @note Implemented as global interrupt enable.
+ */
+#define port_enable() __enable_interrupt()
+
+/**
+ * @brief Enters an architecture-dependent IRQ-waiting mode.
+ * @details The function is meant to return when an interrupt becomes pending.
+ * The simplest implementation is an empty function or macro but this
+ * would not take advantage of architecture-specific power saving
+ * modes.
+ * @note This port function is implemented as inlined code for performance
+ * reasons.
+ * @note The port code does not define a low power mode, this macro has to
+ * be defined externally. The default implementation is a "nop", not
+ * a real low power mode.
+ */
+#if ENABLE_WFI_IDLE != 0
+#ifndef port_wait_for_interrupt
+#define port_wait_for_interrupt() { \
+ __no_operation(); \
+}
+#endif
+#else
+#define port_wait_for_interrupt()
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void port_switch(Thread *ntp, Thread *otp);
+ void port_halt(void);
+ void _port_thread_start(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _CHCORE_H_ */
+
+/** @} */
|