From f12a6e13ce6e9ea1b9a7d0f48b76633e3c9c0164 Mon Sep 17 00:00:00 2001
From: Zachary Cook
Date: Tue, 18 Feb 2020 23:29:38 -0500
Subject: Add fallback addresses so second instance runahead can work

Also prefer MAP_FIXED_NOREPLACE over MAP_FIXED, as it won't remove old memory maps
---
 libpcsxcore/psxmem.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'libpcsxcore')

diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c
index cfd880b..11a01ad 100644
--- a/libpcsxcore/psxmem.c
+++ b/libpcsxcore/psxmem.c
@@ -43,7 +43,11 @@ void *psxMap(unsigned long addr, size_t size, int is_fixed,
 		enum psxMapTag tag)
 {
 #ifdef LIGHTREC
+#ifdef MAP_FIXED_NOREPLACE
+	int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
+#else
 	int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED;
+#endif
 #else
 	int flags = MAP_PRIVATE | MAP_ANONYMOUS;
 #endif
@@ -142,6 +146,9 @@ int psxMemInit() {
 
 #ifdef LIGHTREC
 	psxM = psxMap(0x30000000, 0x00210000, 1, MAP_TAG_RAM);
+	if (psxM == NULL)
+		psxM = psxMap(0x70000000, 0x00210000, 1, MAP_TAG_RAM);
+
 #else
 	psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 #endif
@@ -157,7 +164,12 @@ int psxMemInit() {
 	psxP = &psxM[0x200000];
 #ifdef LIGHTREC
 	psxH = psxMap(0x4f800000, 0x10000, 0, MAP_TAG_OTHER);
+	if (psxH == NULL)
+		psxH = psxMap(0x8f800000, 0x10000, 0, MAP_TAG_OTHER);
+
 	psxR = psxMap(0x4fc00000, 0x80000, 0, MAP_TAG_OTHER);
+	if (psxR == NULL)
+		psxR = psxMap(0x8fc00000, 0x80000, 0, MAP_TAG_OTHER);
 #else
 	psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
 	psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
-- 
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