X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=pcsx_rearmed.git;a=blobdiff_plain;f=libpcsxcore%2Fpsxmem.c;h=9e4426755f9cca01dd92e788e70f9c279e9b1c0d;hp=498246cfe37a6eb148262983d7b07027d2d23eee;hb=b0dd9956467322aca812db75b5e0f11f23c1910b;hpb=6e1a0c4dc569a9635344e42e2f9e973f0b9ab6d5

diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c
index 498246cf..9e442675 100644
--- a/libpcsxcore/psxmem.c
+++ b/libpcsxcore/psxmem.c
@@ -24,6 +24,7 @@
 // TODO: Implement caches & cycle penalty.
 
 #include "psxmem.h"
+#include "psxmem_map.h"
 #include "r3000a.h"
 #include "psxhw.h"
 #include "debug.h"
@@ -33,6 +34,64 @@
 #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;
+	int tried_to_align = 0;
+	unsigned long mask;
+	void *req, *ret;
+
+retry:
+	if (psxMapHook != NULL) {
+		ret = psxMapHook(addr, size, is_fixed, tag);
+		goto out;
+	}
+
+	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;
+
+out:
+	if (addr != 0 && ret != (void *)addr) {
+		SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
+			addr, ret);
+
+		if (ret != NULL && ((addr ^ (long)ret) & 0x00ffffff)
+		    && !tried_to_align)
+		{
+			psxUnmap(ret, size, tag);
+
+			// try to use similarly aligned memory instead
+			// (recompiler needs this)
+			mask = (addr - 1) & ~addr & 0x07ffffff;
+			addr = (unsigned long)(ret + mask) & ~mask;
+			tried_to_align = 1;
+			goto retry;
+		}
+	}
+
+	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)
@@ -68,19 +127,22 @@ int psxMemInit() {
 	memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
 	memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
 
-	psxM = mmap((void *)0x80000000, 0x00210000,
-		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+	psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
+#ifndef RAM_FIXED
+	if (psxM == NULL)
+		psxM = psxMap(0x78000000, 0x00210000, 0, MAP_TAG_RAM);
+#endif
+	if (psxM == NULL) {
+		SysMessage(_("mapping main RAM failed"));
+		return -1;
+	}
 
 	psxP = &psxM[0x200000];
-	psxH = mmap((void *)0x1f800000, 0x00010000,
-		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
-
-	psxR = mmap((void *)0x1fc00000, 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 == MAP_FAILED ||
-		psxP == NULL || psxH != (void *)0x1f800000) {
+		psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) {
 		SysMessage(_("Error allocating memory!"));
 		return -1;
 	}
@@ -135,9 +197,9 @@ void psxMemReset() {
 }
 
 void psxMemShutdown() {
-	munmap(psxM, 0x00210000);
-	munmap(psxH, 0x1f800000);
-	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);