From a06c1d6e156b90ce9bfa18664256dfe8f815857e Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Thu, 23 Dec 2010 19:18:36 +0200
Subject: [PATCH] drc: map bios and fix dummy reads

---
 libpcsxcore/new_dynarec/linkage_arm.s | 22 ++++++++++++++++++++++
 libpcsxcore/new_dynarec/pcsxmem.c     | 12 +++++++++++-
 libpcsxcore/psxmem.c                  |  8 +++++---
 3 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/libpcsxcore/new_dynarec/linkage_arm.s b/libpcsxcore/new_dynarec/linkage_arm.s
index 906c466d..8f1a2b2f 100644
--- a/libpcsxcore/new_dynarec/linkage_arm.s
+++ b/libpcsxcore/new_dynarec/linkage_arm.s
@@ -803,6 +803,9 @@ new_dyna_start:
 .global	ari_write_ram_mirror8
 .global	ari_write_ram_mirror16
 .global	ari_write_ram_mirror32
+.global	ari_read_bios8
+.global	ari_read_bios16
+.global	ari_read_bios32
 .global	ari_read_io8
 .global	ari_read_io16
 .global	ari_read_io32
@@ -893,6 +896,25 @@ ari_write_ram_mirror32:
 	ari_write_ram_mirror (3<<11), word, str
 
 
+.macro ari_read_bios_mirror bic_const op
+	ldr	r0, [fp, #address-dynarec_local]
+	orr	r0, r0, #0x80000000
+	bic	r0, r0, #(0x20000000|\bic_const)	@ map to 0x9fc...
+	\op	r0, [r0]
+	str	r0, [fp, #readmem_dword-dynarec_local]
+	mov	pc, lr
+.endm
+
+ari_read_bios8:
+	ari_read_bios_mirror 0, ldrb
+
+ari_read_bios16:
+	ari_read_bios_mirror 1, ldrh
+
+ari_read_bios32:
+	ari_read_bios_mirror 3, ldr
+
+
 @ for testing
 .macro ari_read_io_old tab_shift
 	str     lr, [sp, #-8]! @ EABI alignment..
diff --git a/libpcsxcore/new_dynarec/pcsxmem.c b/libpcsxcore/new_dynarec/pcsxmem.c
index dc3ce690..a323c18d 100644
--- a/libpcsxcore/new_dynarec/pcsxmem.c
+++ b/libpcsxcore/new_dynarec/pcsxmem.c
@@ -72,6 +72,9 @@ extern void ari_write_ram32();
 extern void ari_write_ram_mirror8();
 extern void ari_write_ram_mirror16();
 extern void ari_write_ram_mirror32();
+extern void ari_read_bios8();
+extern void ari_read_bios16();
+extern void ari_read_bios32();
 extern void ari_read_io8();
 extern void ari_read_io16();
 extern void ari_read_io32();
@@ -295,7 +298,7 @@ void new_dyna_pcsx_mem_init(void)
 		writemem[i] = write_mem32;
 #if 1
 		readmemb[i] = readmemh[i] = readmem[i] = read_mem_dummy;
-		readmemb[i] = readmemh[i] = readmem[i] = write_mem_dummy;
+		writememb[i] = writememh[i] = writemem[i] = write_mem_dummy;
 #endif
 	}
 
@@ -320,6 +323,13 @@ void new_dyna_pcsx_mem_init(void)
 		writemem[i] = ari_write_ram32;
 	}
 
+	// BIOS and it's mirrors
+	for (i = 0x1fc0; i < 0x1fc8; i++) {
+		readmemb[i] = readmemb[0x8000|i] = readmemb[0xa000|i] = ari_read_bios8;
+		readmemh[i] = readmemh[0x8000|i] = readmemh[0xa000|i] = ari_read_bios16;
+		readmem[i]  = readmem[0x8000|i]  = readmem[0xa000|i]  = ari_read_bios32;
+	}
+
 	// I/O
 	readmemb[0x1f80] = ari_read_io8;
 	readmemh[0x1f80] = ari_read_io16;
diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c
index cc27552a..898eac9c 100644
--- a/libpcsxcore/psxmem.c
+++ b/libpcsxcore/psxmem.c
@@ -73,10 +73,12 @@ int psxMemInit() {
 	psxP = &psxM[0x200000];
 	psxH = &psxM[0x210000];
 
-	psxR = (s8 *)malloc(0x00080000);
+	psxR = mmap((void *)0x9fc00000, 0x80000,
+		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 
 	if (psxMemRLUT == NULL || psxMemWLUT == NULL || 
-		psxM != (void *)0x80000000 || psxP == NULL || psxH == NULL) {
+		psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 ||
+		psxP == NULL || psxH == NULL) {
 		SysMessage(_("Error allocating memory!"));
 		return -1;
 	}
@@ -132,8 +134,8 @@ void psxMemReset() {
 
 void psxMemShutdown() {
 	munmap(psxM, 0x00220000);
+	munmap(psxR, 0x80000);
 
-	free(psxR);
 	free(psxMemRLUT);
 	free(psxMemWLUT);
 }
-- 
2.39.2