mirror of https://github.com/cc65/cc65.git
127 lines
4.7 KiB
C
127 lines
4.7 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* mmodel.c */
|
|
/* */
|
|
/* Memory model definitions */
|
|
/* */
|
|
/* */
|
|
/* */
|
|
/* (C) 2003 Ullrich von Bassewitz */
|
|
/* Roemerstrasse 52 */
|
|
/* D-70794 Filderstadt */
|
|
/* EMail: uz@cc65.org */
|
|
/* */
|
|
/* */
|
|
/* This software is provided 'as-is', without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated but is not required. */
|
|
/* 2. Altered source versions must be plainly marked as such, and must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
#include <string.h>
|
|
|
|
/* common */
|
|
#include "addrsize.h"
|
|
#include "mmodel.h"
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Data */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
/* Memory model in use */
|
|
mmodel_t MemoryModel = MMODEL_UNKNOWN;
|
|
|
|
/* Table with memory model names */
|
|
static const char* MemoryModelNames[MMODEL_COUNT] = {
|
|
"near",
|
|
"far",
|
|
"huge",
|
|
};
|
|
|
|
/* Address sizes for the segments */
|
|
unsigned char CodeAddrSize = ADDR_SIZE_ABS;
|
|
unsigned char DataAddrSize = ADDR_SIZE_ABS;
|
|
unsigned char ZpAddrSize = ADDR_SIZE_ZP;
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Code */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
mmodel_t FindMemoryModel (const char* Name)
|
|
/* Find a memory model by name. Return MMODEL_UNKNOWN for an unknown name. */
|
|
{
|
|
unsigned I;
|
|
|
|
/* Check all CPU names */
|
|
for (I = 0; I < MMODEL_COUNT; ++I) {
|
|
if (strcmp (MemoryModelNames[I], Name) == 0) {
|
|
return (mmodel_t)I;
|
|
}
|
|
}
|
|
|
|
/* Not found */
|
|
return MMODEL_UNKNOWN;
|
|
}
|
|
|
|
|
|
|
|
void SetMemoryModel (mmodel_t Model)
|
|
/* Set the memory model updating the MemoryModel variables and the address
|
|
** sizes for the segments.
|
|
*/
|
|
{
|
|
/* Remember the memory model */
|
|
MemoryModel = Model;
|
|
|
|
/* Set the address sizes for the segments */
|
|
switch (MemoryModel) {
|
|
|
|
case MMODEL_NEAR:
|
|
/* Code: near, data: near */
|
|
CodeAddrSize = ADDR_SIZE_ABS;
|
|
DataAddrSize = ADDR_SIZE_ABS;
|
|
break;
|
|
|
|
case MMODEL_FAR:
|
|
/* Code: far, data: near */
|
|
CodeAddrSize = ADDR_SIZE_FAR;
|
|
DataAddrSize = ADDR_SIZE_ABS;
|
|
break;
|
|
|
|
case MMODEL_HUGE:
|
|
/* Code: far, data: far */
|
|
CodeAddrSize = ADDR_SIZE_FAR;
|
|
DataAddrSize = ADDR_SIZE_FAR;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Zeropage is always zeropage */
|
|
ZpAddrSize = ADDR_SIZE_ZP;
|
|
}
|