/**************************************************************************
* arch/8051/src/up_internal.h
*
* Copyright (C) 2007, 2009, 2011, 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************/
#ifndef __ARCH_8051_SRC_UP_INTERNAL_H
#define __ARCH_8051_SRC_UP_INTERNAL_H
/**************************************************************************
* Included Files
**************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <arch/irq.h>
#if defined(CONFIG_ARCH_BOARD_PJRC_87C52)
# include <arch/board/pjrc.h>
#else
# warning "805x board not recognized"
#endif
/**************************************************************************
* Public Definitions
**************************************************************************/
/**************************************************************************
* Public Types
**************************************************************************/
/**************************************************************************
* Public Variables
**************************************************************************/
#ifndef __ASSEMBLY__
/* This is the top of the stack containing the interrupt
* stack frame. It is set when processing an interrupt. It
* is also cleared when the interrupt returns so this can
* also be used like a boolean indication that we are in an
* interrupt.
*/
extern volatile uint8_t g_irqtos;
/* Registers are saved in the following global array during
* interrupt processing. If a context switch is performed
* during the interrupt handling, these registers will be
* copied into the TCB again (NOTE: We could save a copy
* if the interrupt handling logic saved the registers
* directly into (struct tcb_s*)g_readytorun.head->xcp.regs).
*/
extern uint8_t g_irqregs[REGS_SIZE];
/* If during execution of an interrup handler, a context
* switch must be performed, the follwing will be set to
* to that address of the relevant context structure. The
* actual switch will be deferred until the time that the
* the interrupt exits.
*/
extern FAR struct xcptcontext *g_irqcontext;
/* It is faster to look up 8-bit shifts in this table than
* to comput them.
*/
extern const uint8_t g_ntobit[8];
#endif /* __ASSEMBLY */
/**************************************************************************
* Public Function Prototypes
**************************************************************************/
#ifndef __ASSEMBLY__
#if CONFIG_MM_REGIONS > 1
void up_addregion(void);
#endif
void up_delay(uint8_t milliseconds) __naked;
void up_irqinitialize(void);
void up_restorecontext(FAR struct xcptcontext *context) _naked;
void up_restoreregisters(FAR uint8_t *regs) _naked;
uint8_t up_savecontext(FAR struct xcptcontext *context) __naked;
void up_saveregisters(FAR uint8_t *regs) _naked;
void up_saveirqcontext(FAR struct xcptcontext *context);
void up_timer_initialize(void);
/* Defined in up_debug.c */
#if defined(CONFIG_ARCH_8051_BRINGUP)
void up_puthex(uint8_t hex) __naked;
void up_puthex16(int hex) __naked;
void up_putnl(void) __naked;
void up_puts(__code char *ptr);
void up_showsp(uint8_t ch) __naked;
#endif
#if defined(CONFIG_FRAME_DUMP) && defined(CONFIG_ARCH_8051_BRINGUP)
void up_dumpstack(void);
void up_dumpframe(FAR struct xcptcontext *context);
#else
# define up_dumpstack()
# define up_dumpframe(x)
#endif
/* Defined in board/up_leds.c */
#ifdef CONFIG_ARCH_LEDS
void board_led_initialize(void);
void board_led_on(uint8_t led);
void board_led_off(uint8_t led);
#else
# define board_led_initialize()
# define board_led_on(led)
# define board_led_off(led)
#endif
#endif /* __ASSEMBLY */
#endif /* __ARCH_8051_SRC_UP_INTERNAL_H */
