// TODO: Implement caches & cycle penalty.
#include "psxmem.h"
+#include "psxmem_map.h"
#include "r3000a.h"
#include "psxhw.h"
+#include "debug.h"
#include <sys/mman.h>
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
+void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
+ enum psxMapTag tag);
+void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
+
+void *psxMap(unsigned long addr, size_t size, int is_fixed,
+ enum psxMapTag tag)
+{
+ int flags = MAP_PRIVATE | MAP_ANONYMOUS;
+ void *req, *ret;
+
+ if (psxMapHook != NULL)
+ return psxMapHook(addr, size, is_fixed, tag);
+
+ if (is_fixed)
+ flags |= MAP_FIXED;
+
+ req = (void *)addr;
+ ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
+ if (ret == MAP_FAILED)
+ return NULL;
+
+ if (req != NULL && ret != req)
+ SysMessage("psxMap: warning: wanted to map @%p, got %p\n",
+ req, ret);
+
+ return ret;
+}
+
+void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
+{
+ if (psxUnmapHook != NULL) {
+ psxUnmapHook(ptr, size, tag);
+ return;
+ }
+
+ munmap(ptr, size);
+}
+
s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
s8 *psxP = NULL; // Parallel Port (64K)
s8 *psxR = NULL; // BIOS ROM (512K)
memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
- psxM = mmap((void *)0x80000000, 0x00220000,
- PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
+#ifndef RAM_FIXED
+ if (psxM == NULL)
+ psxM = psxMap(0x70000000, 0x00210000, 0, MAP_TAG_RAM);
+#endif
+ if (psxM == NULL) {
+ SysMessage(_("mapping main RAM failed"));
+ return -1;
+ }
psxP = &psxM[0x200000];
- psxH = &psxM[0x210000];
-
- psxR = mmap((void *)0x9fc00000, 0x80000,
- PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ psxH = psxMap(0x1f800000, 0x10000, 1, MAP_TAG_OTHER);
+ psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
- psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 ||
- psxP == NULL || psxH == NULL) {
+ psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) {
SysMessage(_("Error allocating memory!"));
return -1;
}
}
void psxMemShutdown() {
- munmap(psxM, 0x00220000);
- munmap(psxR, 0x80000);
+ psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
+ psxUnmap(psxH, 0x1f800000, MAP_TAG_OTHER);
+ psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
free(psxMemRLUT);
free(psxMemWLUT);