forked from Archive/PX4-Autopilot
160 lines
5.3 KiB
C
160 lines
5.3 KiB
C
|
/****************************************************************************
|
||
|
|
* pexec.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
|
||
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
||
|
|
*
|
||
|
|
* 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 __PEXEC_H
|
||
|
|
#define __PEXEC_H
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Included Files
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Definitions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#define BPERI 2
|
||
|
|
#define ITOBSTACK(i) ((i) << 1)
|
||
|
|
#define BTOISTACK(i) ((i) >> 1)
|
||
|
|
#define ROUNDBTOI(i) (((i) + 1) >> 1)
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Type Definitions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
typedef uint32_t ustack_t; /* Stack values are 16-bits in length */
|
||
|
|
typedef int32_t sstack_t;
|
||
|
|
typedef uint32_t paddr_t; /* Addresses are 16-bits in length */
|
||
|
|
typedef uint16_t level_t; /* Limits to MAXUINT16 levels */
|
||
|
|
|
||
|
|
union stack_u
|
||
|
|
{
|
||
|
|
ustack_t *i;
|
||
|
|
uint8_t *b;
|
||
|
|
};
|
||
|
|
typedef union stack_u stackType;
|
||
|
|
|
||
|
|
/* This structure describes the parameters needed to initialize the p-code
|
||
|
|
* interpreter.
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct pexec_attr_s
|
||
|
|
{
|
||
|
|
/* Instruction space (I-Space) */
|
||
|
|
|
||
|
|
FAR uint8_t *ispace; /* Allocated I-Space containing p-code data */
|
||
|
|
paddr_t entry; /* Entry point */
|
||
|
|
paddr_t maxpc; /* Last valid p-code address */
|
||
|
|
|
||
|
|
/* Read-only data block */
|
||
|
|
|
||
|
|
FAR uint8_t *rodata; /* Address of read-only data block */
|
||
|
|
paddr_t rosize; /* Size of read-only data block */
|
||
|
|
|
||
|
|
/* Allocate for variable storage */
|
||
|
|
|
||
|
|
paddr_t varsize; /* Variable storage size */
|
||
|
|
paddr_t strsize; /* String storage size */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* This structure defines the current state of the p-code interpreter */
|
||
|
|
|
||
|
|
struct pexec_s
|
||
|
|
{
|
||
|
|
/* This is the emulated P-Machine stack (D-Space) */
|
||
|
|
|
||
|
|
stackType dstack;
|
||
|
|
|
||
|
|
/* This is the emulated P-Machine instruction space (I-Space) */
|
||
|
|
|
||
|
|
FAR uint8_t *ispace;
|
||
|
|
|
||
|
|
/* Address of last valid P-Code */
|
||
|
|
|
||
|
|
paddr_t maxpc;
|
||
|
|
|
||
|
|
/* These are the emulated P-Machine registers:
|
||
|
|
*
|
||
|
|
* spb: Base of the stack
|
||
|
|
* sp: The Pascal stack pointer
|
||
|
|
* lsp: Level stack pointer
|
||
|
|
* csp: The current top of the stack used to manage string
|
||
|
|
* storage
|
||
|
|
* fp: Base Register of the current stack frame. Holds the address
|
||
|
|
* of the base of the stack frame of the current block.
|
||
|
|
* fop: Pointer to section containing read-only data
|
||
|
|
* pc: Holds the current p-code location
|
||
|
|
*/
|
||
|
|
|
||
|
|
paddr_t spb; /* Pascal stack base */
|
||
|
|
paddr_t sp; /* Pascal stack pointer */
|
||
|
|
paddr_t lsp; /* Level stack pointer */
|
||
|
|
paddr_t csp; /* Character stack pointer */
|
||
|
|
paddr_t fp; /* Base of the current frame */
|
||
|
|
paddr_t rop; /* Read-only data pointer */
|
||
|
|
paddr_t pc; /* Program counter */
|
||
|
|
|
||
|
|
/* Info needed to perform a simulated reset */
|
||
|
|
|
||
|
|
paddr_t strsize; /* String stack size */
|
||
|
|
paddr_t rosize; /* Read-only stack size */
|
||
|
|
paddr_t entry; /* Entry point */
|
||
|
|
paddr_t stacksize; /* (debug only) */
|
||
|
|
};
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Function Prototypes
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
#define EXTERN extern "C"
|
||
|
|
extern "C" {
|
||
|
|
#else
|
||
|
|
#define EXTERN extern
|
||
|
|
#endif
|
||
|
|
|
||
|
|
EXTERN FAR struct pexec_s *pload(const char *filename, paddr_t varsize, paddr_t strsize);
|
||
|
|
EXTERN FAR struct pexec_s *pexec_init(struct pexec_attr_s *attr);
|
||
|
|
EXTERN int pexec(FAR struct pexec_s *st);
|
||
|
|
EXTERN void pexec_reset(struct pexec_s *st);
|
||
|
|
EXTERN void pexec_release(struct pexec_s *st);
|
||
|
|
|
||
|
|
#undef EXTERN
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __PEXEC_H */
|