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/*-------------------------------------------------------------------------
device.c - Accomodates subtle variations in PIC devices
Written By - Scott Dattalo scott@dattalo.com
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, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-------------------------------------------------------------------------*/
/*
PIC device abstraction
There are dozens of variations of PIC microcontrollers. This include
file attempts to abstract those differences so that SDCC can easily
deal with them.
*/
#ifndef __DEVICE_H__
#define __DEVICE_H__
#include "common.h"
#define MAX_NUM_CONFIGS 16
/*
* Imports
*/
extern char *iComments2;
/* memRange - a structure to define a range of valid memory addresses
*
* The Memory of most PICs (and other micros) is a collection of
* disjoint chunks. The memRange structure will define the start
* and end address of one of these chunks. The memory map of a
* particular device is a collection of memRange struct's.
*/
typedef struct memRange {
int start_address; /* first address in range */
int end_address; /* last */
int alias; /* bit mask defining how/if memory range is aliased
* e.g. alias = 0x80 means start_address is identical
* to the memory location at (0x80 | start_address) */
int bank; /* PIC memory bank this range occupies */
struct memRange *next; /* linked list */
} memRange;
/* Processor unique attributes */
typedef struct PIC_device {
char *name; /* the processor name */
memRange *ram; /* RAM memory map */
memRange *sfr; /* SFR memory map */
int maxRAMaddress; /* maximum value for a data address */
int defMaxRAMaddrs; /* default maximum value for a data address */
int bankMask; /* Bitmask that is ANDed with address to extract banking bits */
// int hasAliasedRAM:1; /* True if there are bank independent registers */
int num_configs; /* number of config words for this device */
int config[MAX_NUM_CONFIGS]; /* addresses of config word(s) */
int programMemSize; /* program memory size in words - for device listing only */
int dataMemSize; /* data (RAM) memory size in bytes - for device listing only */
int eepromMemSize; /* EEPROM memory size in bytes - for device listing only */
int ioPins; /* number of I/O pins - for device listing only */
int isEnhancedCore; /* enhanced cores (19f1934) feature automatic context saving */
} PIC_device;
PIC_device *init_pic(char *pic_type);
int picIsInitialized(void);
char *processor_base_name(void);
int IS_CONFIG_ADDRESS(int addr);
void pic14_assignConfigWordValue(int address, int value);
int pic14_emitConfigWord(FILE *vFile);
int pic14_allRAMShared(void);
int pic14_getSharedStack(int *low, int *high, int *size);
PIC_device * pic14_getPIC(void);
#endif /* __DEVICE_H__ */
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