/*
 * File      : rthw.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
 *
 *  This program 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-03-18     Bernard      the first version
 * 2006-04-25     Bernard      add rt_hw_context_switch_interrupt declaration
 * 2006-09-24     Bernard      add rt_hw_context_switch_to declaration
 * 2012-12-29     Bernard      add rt_hw_exception_install declaration
 * 2017-10-17     Hichard      add some micros
 */

#ifndef __RT_HW_H__
#define __RT_HW_H__

#include <rtthread.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Some macros define
 */
#ifndef HWREG32
#define HWREG32(x)          (*((volatile rt_uint32_t *)(x)))
#endif
#ifndef HWREG16
#define HWREG16(x)          (*((volatile rt_uint16_t *)(x)))
#endif
#ifndef HWREG8
#define HWREG8(x)           (*((volatile rt_uint8_t *)(x)))
#endif

#ifndef RT_CPU_CACHE_LINE_SZ
#define RT_CPU_CACHE_LINE_SZ	32
#endif

enum RT_HW_CACHE_OPS
{
    RT_HW_CACHE_FLUSH      = 0x01,
    RT_HW_CACHE_INVALIDATE = 0x02,
};

/*
 * CPU interfaces
 */
void rt_hw_cpu_icache_enable(void);
void rt_hw_cpu_icache_disable(void);
rt_base_t rt_hw_cpu_icache_status(void);
void rt_hw_cpu_icache_ops(int ops, void* addr, int size);

void rt_hw_cpu_dcache_enable(void);
void rt_hw_cpu_dcache_disable(void);
rt_base_t rt_hw_cpu_dcache_status(void);
void rt_hw_cpu_dcache_ops(int ops, void* addr, int size);

void rt_hw_cpu_reset(void);
void rt_hw_cpu_shutdown(void);

rt_uint8_t *rt_hw_stack_init(void       *entry,
                             void       *parameter,
                             rt_uint8_t *stack_addr,
                             void       *exit);

/*
 * Interrupt handler definition
 */
typedef void (*rt_isr_handler_t)(int vector, void *param);

struct rt_irq_desc
{
    rt_isr_handler_t handler;
    void            *param;

#ifdef RT_USING_INTERRUPT_INFO
    char             name[RT_NAME_MAX];
    rt_uint32_t      counter;
#endif
};

/*
 * Interrupt interfaces
 */
void rt_hw_interrupt_init(void);
void rt_hw_interrupt_mask(int vector);
void rt_hw_interrupt_umask(int vector);
rt_isr_handler_t rt_hw_interrupt_install(int              vector,
                                         rt_isr_handler_t handler,
                                         void            *param,
                                         char            *name);

rt_base_t rt_hw_interrupt_disable(void);
void rt_hw_interrupt_enable(rt_base_t level);

/*
 * Context interfaces
 */
void rt_hw_context_switch(rt_uint32_t from, rt_uint32_t to);
void rt_hw_context_switch_to(rt_uint32_t to);
void rt_hw_context_switch_interrupt(rt_uint32_t from, rt_uint32_t to);

void rt_hw_console_output(const char *str);

void rt_hw_backtrace(rt_uint32_t *fp, rt_uint32_t thread_entry);
void rt_hw_show_memory(rt_uint32_t addr, rt_uint32_t size);

/*
 * Exception interfaces
 */
void rt_hw_exception_install(rt_err_t (*exception_handle)(void *context));

/*
 * delay interfaces
 */
void rt_hw_us_delay(rt_uint32_t us);

#ifdef __cplusplus
}
#endif

#endif
