2012-06-30 09:39:58 +00:00
|
|
|
/*
|
|
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
2013-02-02 10:58:09 +00:00
|
|
|
2011,2012,2013 Giovanni Di Sirio.
|
2012-06-30 09:39:58 +00:00
|
|
|
|
|
|
|
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 cosmic/STM8/chcore.h
|
|
|
|
* @brief STM8 (Cosmic) architecture port macros and structures.
|
|
|
|
*
|
|
|
|
* @addtogroup STM8_COSMIC_CORE
|
|
|
|
* @{
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef _CHCORE_H_
|
|
|
|
#define _CHCORE_H_
|
|
|
|
|
|
|
|
#if CH_DBG_ENABLE_STACK_CHECK
|
|
|
|
#error "option CH_DBG_ENABLE_STACK_CHECK not supported by this port"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*===========================================================================*/
|
|
|
|
/* Port configurable parameters. */
|
|
|
|
/*===========================================================================*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Enables the use of the WFI instruction in the idle thread loop.
|
|
|
|
*/
|
|
|
|
#ifndef STM8_ENABLE_WFI_IDLE
|
|
|
|
#define STM8_ENABLE_WFI_IDLE FALSE
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*===========================================================================*/
|
|
|
|
/* Port exported info. */
|
|
|
|
/*===========================================================================*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Unique macro for the implemented architecture.
|
|
|
|
*/
|
|
|
|
#define CH_ARCHITECTURE_STM8
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Name of the implemented architecture.
|
|
|
|
*/
|
|
|
|
#define CH_ARCHITECTURE_NAME "STM8"
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Name of the compiler supported by this port.
|
|
|
|
*/
|
|
|
|
#define CH_COMPILER_NAME "IAR"
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Port-specific information string.
|
|
|
|
*/
|
|
|
|
#define CH_PORT_INFO "None"
|
|
|
|
|
|
|
|
/*===========================================================================*/
|
|
|
|
/* Port implementation part. */
|
|
|
|
/*===========================================================================*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Base type for stack alignment.
|
|
|
|
* @note No alignment constraints so uint8_t.
|
|
|
|
*/
|
|
|
|
typedef uint8_t stkalign_t;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Generic STM8 function pointer.
|
|
|
|
* @note It is used to allocate the proper size for return addresses in
|
|
|
|
* context-related structures.
|
|
|
|
*/
|
|
|
|
typedef void (*stm8func_t)(void);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Interrupt saved context.
|
|
|
|
* @details This structure represents the stack frame saved during a
|
|
|
|
* preemption-capable interrupt handler.
|
|
|
|
* @note The structure requires one dummy field at its start because the
|
|
|
|
* stack is handled as preincremented/postdecremented.
|
|
|
|
*/
|
|
|
|
struct extctx {
|
|
|
|
uint8_t _next;
|
|
|
|
uint16_t w3;
|
|
|
|
uint16_t w2;
|
|
|
|
uint16_t w1;
|
|
|
|
uint16_t w0;
|
|
|
|
uint8_t cc;
|
|
|
|
uint8_t a;
|
|
|
|
uint16_t x;
|
|
|
|
uint16_t y;
|
|
|
|
uint8_t pce;
|
|
|
|
uint8_t pch;
|
|
|
|
uint8_t pcl;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief System saved context.
|
|
|
|
* @details This structure represents the inner stack frame during a context
|
|
|
|
* switching..
|
|
|
|
* @note The structure requires one dummy field at its start because the
|
|
|
|
* stack is handled as preincremented/postdecremented.
|
|
|
|
*/
|
|
|
|
struct intctx {
|
|
|
|
uint8_t _next;
|
|
|
|
uint16_t w7;
|
|
|
|
uint16_t w6;
|
|
|
|
uint16_t w5;
|
|
|
|
uint16_t w4;
|
|
|
|
stm8func_t pc; /* Function pointer sized return address. */
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @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 Start context.
|
|
|
|
* @details This context is the stack organization for the trampoline code
|
|
|
|
* @p _port_thread_start().
|
|
|
|
*/
|
|
|
|
struct stm8_startctx {
|
|
|
|
uint8_t saved_vreg[8]; // saved virtual registers to restore
|
|
|
|
uint8_t _next;
|
|
|
|
stm8func_t ts; /* Trampoline address. */
|
|
|
|
void *arg; /* Thread argument. */
|
|
|
|
stm8func_t pc; /* Thread function address. */
|
|
|
|
stm8func_t ret; /* chThdExit() address. */
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @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) { \
|
|
|
|
struct stm8_startctx *scp; \
|
|
|
|
scp = (struct stm8_startctx *)((uint8_t *)workspace + wsize - \
|
|
|
|
sizeof(struct stm8_startctx)); \
|
|
|
|
scp->ts = (stm8func_t)_port_thread_start; \
|
|
|
|
scp->arg = (void *)arg; \
|
|
|
|
scp->pc = (stm8func_t)pf; \
|
|
|
|
scp->ret = (stm8func_t)chThdExit; \
|
|
|
|
tp->p_ctx.sp = (struct intctx *)scp; \
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @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 is a safe value, you may trim it down after reading the
|
|
|
|
* right size in the map file.
|
|
|
|
*/
|
|
|
|
#ifndef PORT_INT_REQUIRED_STACK
|
|
|
|
#define PORT_INT_REQUIRED_STACK 48
|
|
|
|
#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) - 1) + \
|
|
|
|
(sizeof(struct extctx) - 1) + \
|
|
|
|
(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(); \
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief IRQ handler function declaration.
|
|
|
|
* @note @p id can be a function name or a vector number depending on the
|
|
|
|
* port implementation.
|
|
|
|
*/
|
|
|
|
#define PORT_IRQ_HANDLER(id) \
|
|
|
|
_Pragma(VECTOR_ID((id)+2)) __interrupt void vector##id(void)
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Port-related initialization code.
|
|
|
|
* @note None in this port.
|
|
|
|
*/
|
|
|
|
#define port_init()
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Kernel-lock action.
|
|
|
|
* @note Implemented as global interrupts disable.
|
|
|
|
*/
|
|
|
|
#define port_lock() asm("sim")
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Kernel-unlock action.
|
|
|
|
* @note Implemented as global interrupts enable.
|
|
|
|
*/
|
|
|
|
#define port_unlock() asm("rim")
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Kernel-lock action from an interrupt handler.
|
|
|
|
* @note This function is empty in this port.
|
|
|
|
*/
|
|
|
|
#define port_lock_from_isr()
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Kernel-unlock action from an interrupt handler.
|
|
|
|
* @note This function is empty in this port.
|
|
|
|
*/
|
|
|
|
#define port_unlock_from_isr()
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Disables all the interrupt sources.
|
|
|
|
* @note Implemented as global interrupts disable.
|
|
|
|
* @note Of course non-maskable interrupt sources are not included.
|
|
|
|
*/
|
|
|
|
#define port_disable() asm("sim")
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Disables the interrupt sources that are not supposed to preempt
|
|
|
|
* the kernel.
|
|
|
|
* @note Same as @p port_disable() in this port, there is no difference
|
|
|
|
* between the two states.
|
|
|
|
*/
|
|
|
|
#define port_suspend() asm("sim")
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Enables all the interrupt sources.
|
|
|
|
* @note Implemented as global interrupt enable.
|
|
|
|
*/
|
|
|
|
#define port_enable() asm("rim")
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Enters an architecture-dependent halt mode.
|
|
|
|
* @note Implemented with the specific "wfi" instruction.
|
|
|
|
*/
|
|
|
|
#if STM8_ENABLE_WFI_IDLE || defined(__DOXYGEN__)
|
|
|
|
#define port_wait_for_interrupt() asm("wfi")
|
|
|
|
#else
|
|
|
|
#define port_wait_for_interrupt()
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Performs a context switch between two threads.
|
|
|
|
* @details This is the most critical code in any port, this function
|
|
|
|
* is responsible for the context switch between 2 threads.
|
|
|
|
* @note Implemented as a call to a low level assembler routine.
|
|
|
|
*
|
|
|
|
* @param ntp the thread to be switched in
|
|
|
|
* @param otp the thread to be switched out
|
|
|
|
*/
|
|
|
|
#define port_switch(ntp, otp) _port_switch(otp)
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
extern "C" {
|
|
|
|
#endif
|
|
|
|
void _port_switch(Thread *otp);
|
|
|
|
__task void _port_thread_start(void);
|
|
|
|
void port_halt(void);
|
|
|
|
#ifdef __cplusplus
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*===========================================================================*/
|
|
|
|
/* Scheduler captured code. */
|
|
|
|
/*===========================================================================*/
|
|
|
|
|
|
|
|
#define PORT_OPTIMIZED_RLIST_VAR
|
|
|
|
#define PORT_OPTIMIZED_RLIST_EXT
|
|
|
|
#define PORT_OPTIMIZED_READYLIST_STRUCT
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
ThreadsQueue r_queue;
|
|
|
|
tprio_t r_prio;
|
|
|
|
Thread *r_current;
|
2013-07-20 18:13:52 +00:00
|
|
|
#if CH_CFG_USE_REGISTRY
|
2012-06-30 09:39:58 +00:00
|
|
|
Thread *r_newer;
|
|
|
|
Thread *r_older;
|
|
|
|
#endif
|
|
|
|
/* End of the fields shared with the Thread structure.*/
|
2013-07-20 18:13:52 +00:00
|
|
|
#if CH_CFG_TIME_QUANTUM > 0
|
2012-06-30 09:39:58 +00:00
|
|
|
cnt_t r_preempt;
|
|
|
|
#endif
|
|
|
|
} ReadyList;
|
|
|
|
|
|
|
|
extern __tiny ReadyList rlist;
|
|
|
|
|
|
|
|
#endif /* _CHCORE_H_ */
|
|
|
|
|
|
|
|
/** @} */
|