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uae_cpu
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memory.cpp
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C/C++ Source or Header
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1999-11-03
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15KB
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612 lines
/*
* UAE - The Un*x Amiga Emulator
*
* Memory management
*
* (c) 1995 Bernd Schmidt
*/
#include <stdio.h>
#include <stdlib.h>
#include "sysdeps.h"
#include "cpu_emulation.h"
#include "m68k.h"
#include "memory.h"
#include "readcpu.h"
#include "newcpu.h"
#include "main.h"
#include "video.h"
static bool illegal_mem = false;
#ifdef SAVE_MEMORY_BANKS
addrbank *mem_banks[65536];
#else
addrbank mem_banks[65536];
#endif
#ifdef NO_INLINE_MEMORY_ACCESS
__inline__ uae_u32 longget (uaecptr addr)
{
return call_mem_get_func (get_mem_bank (addr).lget, addr);
}
__inline__ uae_u32 wordget (uaecptr addr)
{
return call_mem_get_func (get_mem_bank (addr).wget, addr);
}
__inline__ uae_u32 byteget (uaecptr addr)
{
return call_mem_get_func (get_mem_bank (addr).bget, addr);
}
__inline__ void longput (uaecptr addr, uae_u32 l)
{
call_mem_put_func (get_mem_bank (addr).lput, addr, l);
}
__inline__ void wordput (uaecptr addr, uae_u32 w)
{
call_mem_put_func (get_mem_bank (addr).wput, addr, w);
}
__inline__ void byteput (uaecptr addr, uae_u32 b)
{
call_mem_put_func (get_mem_bank (addr).bput, addr, b);
}
#endif
/* A dummy bank that only contains zeros */
static uae_u32 REGPARAM2 dummy_lget (uaecptr) REGPARAM;
static uae_u32 REGPARAM2 dummy_wget (uaecptr) REGPARAM;
static uae_u32 REGPARAM2 dummy_bget (uaecptr) REGPARAM;
static void REGPARAM2 dummy_lput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 dummy_wput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 dummy_bput (uaecptr, uae_u32) REGPARAM;
static int REGPARAM2 dummy_check (uaecptr addr, uae_u32 size) REGPARAM;
uae_u32 REGPARAM2 dummy_lget (uaecptr addr)
{
if (illegal_mem)
write_log ("Illegal lget at %08lx\n", addr);
return 0;
}
uae_u32 REGPARAM2 dummy_wget (uaecptr addr)
{
if (illegal_mem)
write_log ("Illegal wget at %08lx\n", addr);
return 0;
}
uae_u32 REGPARAM2 dummy_bget (uaecptr addr)
{
if (illegal_mem)
write_log ("Illegal bget at %08lx\n", addr);
return 0;
}
void REGPARAM2 dummy_lput (uaecptr addr, uae_u32 l)
{
if (illegal_mem)
write_log ("Illegal lput at %08lx\n", addr);
}
void REGPARAM2 dummy_wput (uaecptr addr, uae_u32 w)
{
if (illegal_mem)
write_log ("Illegal wput at %08lx\n", addr);
}
void REGPARAM2 dummy_bput (uaecptr addr, uae_u32 b)
{
if (illegal_mem)
write_log ("Illegal bput at %08lx\n", addr);
}
int REGPARAM2 dummy_check (uaecptr addr, uae_u32 size)
{
if (illegal_mem)
write_log ("Illegal check at %08lx\n", addr);
return 0;
}
/* Mac RAM (32 bit addressing) */
static uae_u32 REGPARAM2 ram_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 ram_wget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 ram_bget(uaecptr) REGPARAM;
static void REGPARAM2 ram_lput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 ram_wput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 ram_bput(uaecptr, uae_u32) REGPARAM;
static int REGPARAM2 ram_check(uaecptr addr, uae_u32 size) REGPARAM;
static uae_u8 *REGPARAM2 ram_xlate(uaecptr addr) REGPARAM;
static uae_u32 RAMBaseDiff; // RAMBaseHost - RAMBaseMac
uae_u32 REGPARAM2 ram_lget(uaecptr addr)
{
uae_u32 *m;
m = (uae_u32 *)(RAMBaseDiff + addr);
return do_get_mem_long(m);
}
uae_u32 REGPARAM2 ram_wget(uaecptr addr)
{
uae_u16 *m;
m = (uae_u16 *)(RAMBaseDiff + addr);
return do_get_mem_word(m);
}
uae_u32 REGPARAM2 ram_bget(uaecptr addr)
{
return (uae_u32)*(uae_u8 *)(RAMBaseDiff + addr);
}
void REGPARAM2 ram_lput(uaecptr addr, uae_u32 l)
{
uae_u32 *m;
m = (uae_u32 *)(RAMBaseDiff + addr);
do_put_mem_long(m, l);
}
void REGPARAM2 ram_wput(uaecptr addr, uae_u32 w)
{
uae_u16 *m;
m = (uae_u16 *)(RAMBaseDiff + addr);
do_put_mem_word(m, w);
}
void REGPARAM2 ram_bput(uaecptr addr, uae_u32 b)
{
*(uae_u8 *)(RAMBaseDiff + addr) = b;
}
int REGPARAM2 ram_check(uaecptr addr, uae_u32 size)
{
return (addr - RAMBaseMac + size) < RAMSize;
}
uae_u8 *REGPARAM2 ram_xlate(uaecptr addr)
{
return (uae_u8 *)(RAMBaseDiff + addr);
}
/* Mac RAM (24 bit addressing) */
static uae_u32 REGPARAM2 ram24_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 ram24_wget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 ram24_bget(uaecptr) REGPARAM;
static void REGPARAM2 ram24_lput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 ram24_wput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 ram24_bput(uaecptr, uae_u32) REGPARAM;
static int REGPARAM2 ram24_check(uaecptr addr, uae_u32 size) REGPARAM;
static uae_u8 *REGPARAM2 ram24_xlate(uaecptr addr) REGPARAM;
uae_u32 REGPARAM2 ram24_lget(uaecptr addr)
{
uae_u32 *m;
m = (uae_u32 *)(RAMBaseDiff + (addr & 0xffffff));
return do_get_mem_long(m);
}
uae_u32 REGPARAM2 ram24_wget(uaecptr addr)
{
uae_u16 *m;
m = (uae_u16 *)(RAMBaseDiff + (addr & 0xffffff));
return do_get_mem_word(m);
}
uae_u32 REGPARAM2 ram24_bget(uaecptr addr)
{
return (uae_u32)*(uae_u8 *)(RAMBaseDiff + (addr & 0xffffff));
}
void REGPARAM2 ram24_lput(uaecptr addr, uae_u32 l)
{
uae_u32 *m;
m = (uae_u32 *)(RAMBaseDiff + (addr & 0xffffff));
do_put_mem_long(m, l);
}
void REGPARAM2 ram24_wput(uaecptr addr, uae_u32 w)
{
uae_u16 *m;
m = (uae_u16 *)(RAMBaseDiff + (addr & 0xffffff));
do_put_mem_word(m, w);
}
void REGPARAM2 ram24_bput(uaecptr addr, uae_u32 b)
{
*(uae_u8 *)(RAMBaseDiff + (addr & 0xffffff)) = b;
}
int REGPARAM2 ram24_check(uaecptr addr, uae_u32 size)
{
return ((addr & 0xffffff) - RAMBaseMac + size) < RAMSize;
}
uae_u8 *REGPARAM2 ram24_xlate(uaecptr addr)
{
return (uae_u8 *)(RAMBaseDiff + (addr & 0xffffff));
}
/* Mac ROM (32 bit addressing) */
static uae_u32 REGPARAM2 rom_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 rom_wget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 rom_bget(uaecptr) REGPARAM;
static void REGPARAM2 rom_lput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 rom_wput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 rom_bput(uaecptr, uae_u32) REGPARAM;
static int REGPARAM2 rom_check(uaecptr addr, uae_u32 size) REGPARAM;
static uae_u8 *REGPARAM2 rom_xlate(uaecptr addr) REGPARAM;
static uae_u32 ROMBaseDiff; // ROMBaseHost - ROMBaseMac
uae_u32 REGPARAM2 rom_lget(uaecptr addr)
{
uae_u32 *m;
m = (uae_u32 *)(ROMBaseDiff + addr);
return do_get_mem_long(m);
}
uae_u32 REGPARAM2 rom_wget(uaecptr addr)
{
uae_u16 *m;
m = (uae_u16 *)(ROMBaseDiff + addr);
return do_get_mem_word(m);
}
uae_u32 REGPARAM2 rom_bget(uaecptr addr)
{
return (uae_u32)*(uae_u8 *)(ROMBaseDiff + addr);
}
void REGPARAM2 rom_lput(uaecptr addr, uae_u32 b)
{
if (illegal_mem)
write_log ("Illegal ROM lput at %08lx\n", addr);
}
void REGPARAM2 rom_wput(uaecptr addr, uae_u32 b)
{
if (illegal_mem)
write_log ("Illegal ROM wput at %08lx\n", addr);
}
void REGPARAM2 rom_bput(uaecptr addr, uae_u32 b)
{
if (illegal_mem)
write_log ("Illegal ROM bput at %08lx\n", addr);
}
int REGPARAM2 rom_check(uaecptr addr, uae_u32 size)
{
return (addr - ROMBaseMac + size) < ROMSize;
}
uae_u8 *REGPARAM2 rom_xlate(uaecptr addr)
{
return (uae_u8 *)(ROMBaseDiff + addr);
}
/* Mac ROM (24 bit addressing) */
static uae_u32 REGPARAM2 rom24_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 rom24_wget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 rom24_bget(uaecptr) REGPARAM;
static int REGPARAM2 rom24_check(uaecptr addr, uae_u32 size) REGPARAM;
static uae_u8 *REGPARAM2 rom24_xlate(uaecptr addr) REGPARAM;
uae_u32 REGPARAM2 rom24_lget(uaecptr addr)
{
uae_u32 *m;
m = (uae_u32 *)(ROMBaseDiff + (addr & 0xffffff));
return do_get_mem_long(m);
}
uae_u32 REGPARAM2 rom24_wget(uaecptr addr)
{
uae_u16 *m;
m = (uae_u16 *)(ROMBaseDiff + (addr & 0xffffff));
return do_get_mem_word(m);
}
uae_u32 REGPARAM2 rom24_bget(uaecptr addr)
{
return (uae_u32)*(uae_u8 *)(ROMBaseDiff + (addr & 0xffffff));
}
int REGPARAM2 rom24_check(uaecptr addr, uae_u32 size)
{
return ((addr & 0xffffff) - ROMBaseMac + size) < ROMSize;
}
uae_u8 *REGPARAM2 rom24_xlate(uaecptr addr)
{
return (uae_u8 *)(ROMBaseDiff + (addr & 0xffffff));
}
/* Frame buffer */
static uae_u32 REGPARAM2 frame_direct_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 frame_direct_wget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 frame_direct_bget(uaecptr) REGPARAM;
static void REGPARAM2 frame_direct_lput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 frame_direct_wput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 frame_direct_bput(uaecptr, uae_u32) REGPARAM;
static uae_u32 REGPARAM2 frame_host_555_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 frame_host_555_wget(uaecptr) REGPARAM;
static void REGPARAM2 frame_host_555_lput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 frame_host_555_wput(uaecptr, uae_u32) REGPARAM;
static uae_u32 REGPARAM2 frame_host_565_lget(uaecptr) REGPARAM;
static uae_u32 REGPARAM2 frame_host_565_wget(uaecptr) REGPARAM;
static void REGPARAM2 frame_host_565_lput(uaecptr, uae_u32) REGPARAM;
static void REGPARAM2 frame_host_565_wput(uaecptr, uae_u32) REGPARAM;
static uae_u32 REGPARAM2 frame_host_888_lget(uaecptr) REGPARAM;
static void REGPARAM2 frame_host_888_lput(uaecptr, uae_u32) REGPARAM;
static int REGPARAM2 frame_check(uaecptr addr, uae_u32 size) REGPARAM;
static uae_u8 *REGPARAM2 frame_xlate(uaecptr addr) REGPARAM;
static uae_u32 FrameBaseDiff; // MacFrameBaseHost - MacFrameBaseMac
uae_u32 REGPARAM2 frame_direct_lget(uaecptr addr)
{
uae_u32 *m;
m = (uae_u32 *)(FrameBaseDiff + addr);
return do_get_mem_long(m);
}
uae_u32 REGPARAM2 frame_direct_wget(uaecptr addr)
{
uae_u16 *m;
m = (uae_u16 *)(FrameBaseDiff + addr);
return do_get_mem_word(m);
}
uae_u32 REGPARAM2 frame_direct_bget(uaecptr addr)
{
return (uae_u32)*(uae_u8 *)(FrameBaseDiff + addr);
}
void REGPARAM2 frame_direct_lput(uaecptr addr, uae_u32 l)
{
uae_u32 *m;
m = (uae_u32 *)(FrameBaseDiff + addr);
do_put_mem_long(m, l);
}
void REGPARAM2 frame_direct_wput(uaecptr addr, uae_u32 w)
{
uae_u16 *m;
m = (uae_u16 *)(FrameBaseDiff + addr);
do_put_mem_word(m, w);
}
void REGPARAM2 frame_direct_bput(uaecptr addr, uae_u32 b)
{
*(uae_u8 *)(FrameBaseDiff + addr) = b;
}
uae_u32 REGPARAM2 frame_host_555_lget(uaecptr addr)
{
uae_u32 *m, l;
m = (uae_u32 *)(FrameBaseDiff + addr);
l = *m;
return (l >> 16) | (l << 16);
}
uae_u32 REGPARAM2 frame_host_555_wget(uaecptr addr)
{
uae_u16 *m;
m = (uae_u16 *)(FrameBaseDiff + addr);
return *m;
}
void REGPARAM2 frame_host_555_lput(uaecptr addr, uae_u32 l)
{
uae_u32 *m;
m = (uae_u32 *)(FrameBaseDiff + addr);
*m = (l >> 16) | (l << 16);
}
void REGPARAM2 frame_host_555_wput(uaecptr addr, uae_u32 w)
{
uae_u16 *m;
m = (uae_u16 *)(FrameBaseDiff + addr);
*m = w;
}
uae_u32 REGPARAM2 frame_host_565_lget(uaecptr addr)
{
uae_u32 *m, l;
m = (uae_u32 *)(FrameBaseDiff + addr);
l = *m;
l = (l & 0x001f001f) | ((l >> 1) & 0x7fe07fe0);
return (l >> 16) | (l << 16);
}
uae_u32 REGPARAM2 frame_host_565_wget(uaecptr addr)
{
uae_u16 *m, w;
m = (uae_u16 *)(FrameBaseDiff + addr);
w = *m;
return (w & 0x1f) | ((w >> 1) & 0x7fe0);
}
void REGPARAM2 frame_host_565_lput(uaecptr addr, uae_u32 l)
{
uae_u32 *m;
m = (uae_u32 *)(FrameBaseDiff + addr);
l = (l & 0x001f001f) | ((l << 1) & 0xffc0ffc0);
*m = (l >> 16) | (l << 16);
}
void REGPARAM2 frame_host_565_wput(uaecptr addr, uae_u32 w)
{
uae_u16 *m;
m = (uae_u16 *)(FrameBaseDiff + addr);
*m = (w & 0x1f) | ((w << 1) & 0xffc0);
}
uae_u32 REGPARAM2 frame_host_888_lget(uaecptr addr)
{
uae_u32 *m, l;
m = (uae_u32 *)(FrameBaseDiff + addr);
return *m;
}
void REGPARAM2 frame_host_888_lput(uaecptr addr, uae_u32 l)
{
uae_u32 *m;
m = (uae_u32 *)(MacFrameBaseHost + addr - MacFrameBaseMac);
*m = l;
}
int REGPARAM2 frame_check(uaecptr addr, uae_u32 size)
{
return (addr - MacFrameBaseMac + size) < MacFrameSize;
}
uae_u8 *REGPARAM2 frame_xlate(uaecptr addr)
{
return (uae_u8 *)(FrameBaseDiff + addr);
}
/* Default memory access functions */
int REGPARAM2 default_check (uaecptr a, uae_u32 b)
{
return 0;
}
uae_u8 *REGPARAM2 default_xlate (uaecptr a)
{
write_log("Your Mac program just did something terribly stupid\n");
return NULL;
}
/* Address banks */
addrbank dummy_bank = {
dummy_lget, dummy_wget, dummy_bget,
dummy_lput, dummy_wput, dummy_bput,
default_xlate, dummy_check
};
addrbank ram_bank = {
ram_lget, ram_wget, ram_bget,
ram_lput, ram_wput, ram_bput,
ram_xlate, ram_check
};
addrbank ram24_bank = {
ram24_lget, ram24_wget, ram24_bget,
ram24_lput, ram24_wput, ram24_bput,
ram24_xlate, ram24_check
};
addrbank rom_bank = {
rom_lget, rom_wget, rom_bget,
rom_lput, rom_wput, rom_bput,
rom_xlate, rom_check
};
addrbank rom24_bank = {
rom24_lget, rom24_wget, rom24_bget,
rom_lput, rom_wput, rom_bput,
rom24_xlate, rom24_check
};
addrbank frame_direct_bank = {
frame_direct_lget, frame_direct_wget, frame_direct_bget,
frame_direct_lput, frame_direct_wput, frame_direct_bput,
frame_xlate, frame_check
};
addrbank frame_host_555_bank = {
frame_host_555_lget, frame_host_555_wget, frame_direct_bget,
frame_host_555_lput, frame_host_555_wput, frame_direct_bput,
frame_xlate, frame_check
};
addrbank frame_host_565_bank = {
frame_host_565_lget, frame_host_565_wget, frame_direct_bget,
frame_host_565_lput, frame_host_565_wput, frame_direct_bput,
frame_xlate, frame_check
};
addrbank frame_host_888_bank = {
frame_host_888_lget, frame_direct_wget, frame_direct_bget,
frame_host_888_lput, frame_direct_wput, frame_direct_bput,
frame_xlate, frame_check
};
void memory_init(void)
{
char buffer[4096];
char *nam;
int i, fd;
for(i=0; i<65536; i++)
put_mem_bank(i<<16, &dummy_bank);
// Limit RAM size to not overlap ROM
#if REAL_ADDRESSING
uint32 ram_size = RAMSize;
#else
uint32 ram_size = RAMSize > ROMBaseMac ? ROMBaseMac : RAMSize;
#endif
RAMBaseDiff = (uae_u32)RAMBaseHost - (uae_u32)RAMBaseMac;
ROMBaseDiff = (uae_u32)ROMBaseHost - (uae_u32)ROMBaseMac;
FrameBaseDiff = (uae_u32)MacFrameBaseHost - (uae_u32)MacFrameBaseMac;
// Map RAM and ROM
if (TwentyFourBitAddressing) {
map_banks(&ram24_bank, RAMBaseMac >> 16, ram_size >> 16);
map_banks(&rom24_bank, ROMBaseMac >> 16, ROMSize >> 16);
} else {
map_banks(&ram_bank, RAMBaseMac >> 16, ram_size >> 16);
map_banks(&rom_bank, ROMBaseMac >> 16, ROMSize >> 16);
}
// Map frame buffer
switch (MacFrameLayout) {
case FLAYOUT_DIRECT:
map_banks(&frame_direct_bank, MacFrameBaseMac >> 16, (MacFrameSize >> 16) + 1);
break;
case FLAYOUT_HOST_555:
map_banks(&frame_host_555_bank, MacFrameBaseMac >> 16, (MacFrameSize >> 16) + 1);
break;
case FLAYOUT_HOST_565:
map_banks(&frame_host_565_bank, MacFrameBaseMac >> 16, (MacFrameSize >> 16) + 1);
break;
case FLAYOUT_HOST_888:
map_banks(&frame_host_888_bank, MacFrameBaseMac >> 16, (MacFrameSize >> 16) + 1);
break;
}
}
void map_banks(addrbank *bank, int start, int size)
{
int bnr;
unsigned long int hioffs = 0, endhioffs = 0x100;
if (start >= 0x100) {
for (bnr = start; bnr < start + size; bnr++)
put_mem_bank (bnr << 16, bank);
return;
}
if (TwentyFourBitAddressing) endhioffs = 0x10000;
for (hioffs = 0; hioffs < endhioffs; hioffs += 0x100)
for (bnr = start; bnr < start+size; bnr++)
put_mem_bank((bnr + hioffs) << 16, bank);
}