From: notaz <notasas@gmail.com>
Date: Mon, 1 Aug 2011 20:22:04 +0000 (+0300)
Subject: frontnd: pcnt: enable counters to avoid using ext tools
X-Git-Tag: r9~20
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=pcsx_rearmed.git;a=commitdiff_plain;h=19e57cbf170d1ce49f00097f3cc3a4ed96d77374

frontnd: pcnt: enable counters to avoid using ext tools
---

diff --git a/frontend/pcnt.h b/frontend/pcnt.h
index 232ae077..3969aa4e 100644
--- a/frontend/pcnt.h
+++ b/frontend/pcnt.h
@@ -83,6 +83,19 @@ static inline unsigned int pcnt_get(void)
 	return val;
 }
 
+static inline void pcnt_init(void)
+{
+#ifdef __ARM_ARCH_7A__
+	int v;
+	asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(v));
+	v |= 5; // master enable, ccnt reset
+	v &= ~8; // ccnt divider 0
+	asm volatile("mcr p15, 0, %0, c9, c12, 0" :: "r"(v));
+	// enable cycle counter
+	asm volatile("mcr p15, 0, %0, c9, c12, 1" :: "r"(1<<31));
+#endif
+}
+
 #else
 
 #define pcnt_start(id)
diff --git a/frontend/plugin.c b/frontend/plugin.c
index cbb5558d..7b0d3011 100644
--- a/frontend/plugin.c
+++ b/frontend/plugin.c
@@ -271,8 +271,7 @@ pc_hook_func              (SPU_playCDDAchannel, (short *a0, int a1), (a0, a1), P
 
 void pcnt_hook_plugins(void)
 {
-	/* test it first */
-	pcnt_get();
+	pcnt_init();
 
 	hook_it(GPU_writeStatus);
 	hook_it(GPU_writeData);