From 0c2126b9446fea1eb2a4e4c84fcb5ac1f364e81c Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Thu, 14 Dec 2023 21:05:21 +0200
Subject: [PATCH] remove one of the hacks

seems to no longer be needed
added in 979b861b31ef1f5033db5bd4433b842944300a3e
---
 libpcsxcore/database.c            |  7 -------
 libpcsxcore/new_dynarec/pcsxmem.c |  4 ----
 libpcsxcore/psxcommon.h           |  1 -
 libpcsxcore/psxhw.c               | 18 +-----------------
 libpcsxcore/psxhw.h               |  1 -
 5 files changed, 1 insertion(+), 30 deletions(-)

diff --git a/libpcsxcore/database.c b/libpcsxcore/database.c
index 66b54f44..86a24a49 100644
--- a/libpcsxcore/database.c
+++ b/libpcsxcore/database.c
@@ -39,12 +39,6 @@ static const char * const gpu_slow_llist_db[] =
 	"SLES02731", "SLPS02477", "SLPS03198", "SLUS01138",
 };
 
-static const char * const gpu_busy_hack_db[] =
-{
-	/* ToHeart (Japan) */
-	"SLPS01919", "SLPS01920",
-};
-
 static const char * const gpu_centering_hack_db[] =
 {
 	/* Gradius Gaiden */
@@ -79,7 +73,6 @@ hack_db[] =
 {
 	HACK_ENTRY(cdr_read_timing, cdr_read_hack_db),
 	HACK_ENTRY(gpu_slow_list_walking, gpu_slow_llist_db),
-	HACK_ENTRY(gpu_busy, gpu_busy_hack_db),
 	HACK_ENTRY(gpu_centering, gpu_centering_hack_db),
 	HACK_ENTRY(gpu_timing1024, dualshock_timing1024_hack_db),
 	HACK_ENTRY(dualshock_init_analog, dualshock_init_analog_hack_db),
diff --git a/libpcsxcore/new_dynarec/pcsxmem.c b/libpcsxcore/new_dynarec/pcsxmem.c
index e61e8a35..905f3a2c 100644
--- a/libpcsxcore/new_dynarec/pcsxmem.c
+++ b/libpcsxcore/new_dynarec/pcsxmem.c
@@ -510,10 +510,6 @@ void new_dyna_pcsx_mem_reset(void)
 	// plugins might change so update the pointers
 	map_item(&mem_iortab[IOMEM32(0x1810)], GPU_readData, 1);
 	map_item(&mem_iowtab[IOMEM32(0x1810)], GPU_writeData, 1);
-	if (Config.hacks.gpu_busy)
-		map_item(&mem_iortab[IOMEM32(0x1814)], psxHwReadGpuSRbusyHack, 1);
-	else
-		map_item(&mem_iortab[IOMEM32(0x1814)], psxHwReadGpuSR, 1);
 }
 
 void new_dyna_pcsx_mem_shutdown(void)
diff --git a/libpcsxcore/psxcommon.h b/libpcsxcore/psxcommon.h
index dce4f41e..a25e6252 100644
--- a/libpcsxcore/psxcommon.h
+++ b/libpcsxcore/psxcommon.h
@@ -150,7 +150,6 @@ typedef struct {
 	struct {
 		boolean cdr_read_timing;
 		boolean gpu_slow_list_walking;
-		boolean gpu_busy;
 		boolean gpu_centering;
 		boolean dualshock_init_analog;
 		boolean gpu_timing1024;
diff --git a/libpcsxcore/psxhw.c b/libpcsxcore/psxhw.c
index 8179d959..0a468753 100644
--- a/libpcsxcore/psxhw.c
+++ b/libpcsxcore/psxhw.c
@@ -27,8 +27,6 @@
 #include "cdrom.h"
 #include "gpu.h"
 
-static u32 (*psxHwReadGpuSRptr)(void) = psxHwReadGpuSR;
-
 void psxHwReset() {
 	memset(psxH, 0, 0x10000);
 
@@ -36,8 +34,6 @@ void psxHwReset() {
 	cdrReset();
 	psxRcntInit();
 	HW_GPU_STATUS = SWAP32(0x10802000);
-	psxHwReadGpuSRptr = Config.hacks.gpu_busy
-		? psxHwReadGpuSRbusyHack : psxHwReadGpuSR;
 }
 
 void psxHwWriteIstat(u32 value)
@@ -121,18 +117,6 @@ u32 psxHwReadGpuSR(void)
 	return v;
 }
 
-// a hack due to poor timing of gpu idle bit
-// to get rid of this, GPU draw times, DMAs, cpu timing has to fall within
-// certain timing window or else games like "ToHeart" softlock
-u32 psxHwReadGpuSRbusyHack(void)
-{
-	u32 v = psxHwReadGpuSR();
-	static u32 hack;
-	if (!(hack++ & 3))
-		v &= ~PSXGPU_nBUSY;
-	return v;
-}
-
 u8 psxHwRead8(u32 add) {
 	u8 hard;
 
@@ -254,7 +238,7 @@ u32 psxHwRead32(u32 add) {
 	case 0x1124: hard = psxRcntRmode(2); break;
 	case 0x1128: hard = psxRcntRtarget(2); break;
 	case 0x1810: hard = GPU_readData(); break;
-	case 0x1814: hard = psxHwReadGpuSRptr(); break;
+	case 0x1814: hard = psxHwReadGpuSR(); break;
 	case 0x1820: hard = mdecRead0(); break;
 	case 0x1824: hard = mdecRead1(); break;
 
diff --git a/libpcsxcore/psxhw.h b/libpcsxcore/psxhw.h
index 574ee333..3017c901 100644
--- a/libpcsxcore/psxhw.h
+++ b/libpcsxcore/psxhw.h
@@ -93,7 +93,6 @@ void psxHwWriteChcr6(u32 value);
 void psxHwWriteDmaIcr32(u32 value);
 void psxHwWriteGpuSR(u32 value);
 u32  psxHwReadGpuSR(void);
-u32  psxHwReadGpuSRbusyHack(void);
 
 #ifdef __cplusplus
 }
-- 
2.39.5