arm: clean cache management

unify arm cache management except for non standard cache as ARM7TDMI

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 11 insertions, 37 deletions

diff --git a/cpu/arm946es/cpu.c b/cpu/arm946es/cpu.c
index 25684f201..8d0c53343 100644
--- a/cpu/arm946es/cpu.c
+++ b/cpu/arm946es/cpu.c
@@ -38,13 +38,7 @@
 DECLARE_GLOBAL_DATA_PTR;
 #endif
 
-static void cp_delay (void)
-{
-	volatile int i;
-
-	/* copro seems to need some delay between reading and writing */
-	for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
 
 int cpu_init (void)
 {
@@ -67,8 +61,6 @@ int cleanup_before_linux (void)
 	 * we turn off caches etc ...
 	 */
 
-	unsigned long i;
-
 	disable_interrupts ();
 
 	/* ARM926E-S needs the protection unit enabled for the icache to have
@@ -76,15 +68,12 @@ int cleanup_before_linux (void)
 	 * should turn off the protection unit as well....
 	 */
 	/* turn off I/D-cache */
-	asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
-	i &= ~(CR_C | CR_I);
-	asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
-
+	icache_disable();
+	dcache_disable();
 	/* flush I/D-cache */
-	i = 0;
-	asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
-	asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
-	return (0);
+	cache_flush();
+
+	return 0;
 }
 
 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -96,27 +85,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	/*NOTREACHED*/
 	return (0);
 }
-/* ARM926E-S needs the protection unit enabled for this to have any effect
-   - left for possible later use */
-void icache_enable (void)
-{
-	ulong reg;
 
-	reg = get_cr ();		/* get control reg. */
-	cp_delay ();
-	set_cr (reg | CR_I);
-}
-
-void icache_disable (void)
+/* flush I/D-cache */
+static void cache_flush (void)
 {
-	ulong reg;
+	unsigned long i = 0;
 
-	reg = get_cr ();
-	cp_delay ();
-	set_cr (reg & ~CR_I);
-}
-
-int icache_status (void)
-{
-	return (get_cr () & CR_I) != 0;
+	asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+	asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
 }