arm: update co-processor 15 access
import system.h from linux
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/arm925t/cpu.c b/cpu/arm925t/cpu.c
index b9f0931..8d1b562 100644
--- a/cpu/arm925t/cpu.c
+++ b/cpu/arm925t/cpu.c
@@ -32,43 +32,12 @@
#include <common.h>
#include <command.h>
#include <arm925t.h>
+#include <asm/system.h>
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
#endif
-/* read co-processor 15, register #1 (control register) */
-static unsigned long read_p15_c1 (void)
-{
- unsigned long value;
-
- __asm__ __volatile__(
- "mrc p15, 0, %0, c1, c0, 0 @ read control reg\n"
- : "=r" (value)
- :
- : "memory");
-
-#ifdef MMU_DEBUG
- printf ("p15/c1 is = %08lx\n", value);
-#endif
- return value;
-}
-
-/* write to co-processor 15, register #1 (control register) */
-static void write_p15_c1 (unsigned long value)
-{
-#ifdef MMU_DEBUG
- printf ("write %08lx to p15/c1\n", value);
-#endif
- __asm__ __volatile__(
- "mcr p15, 0, %0, c1, c0, 0 @ write it back\n"
- :
- : "r" (value)
- : "memory");
-
- read_p15_c1 ();
-}
-
static void cp_delay (void)
{
volatile int i;
@@ -77,18 +46,6 @@
for (i = 0; i < 100; i++);
}
-/* See also ARM Ref. Man. */
-#define C1_MMU (1<<0) /* mmu off/on */
-#define C1_ALIGN (1<<1) /* alignment faults off/on */
-#define C1_DC (1<<2) /* dcache off/on */
-#define C1_WB (1<<3) /* merging write buffer on/off */
-#define C1_BIG_ENDIAN (1<<7) /* big endian off/on */
-#define C1_SYS_PROT (1<<8) /* system protection */
-#define C1_ROM_PROT (1<<9) /* ROM protection */
-#define C1_IC (1<<12) /* icache off/on */
-#define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */
-#define RESERVED_1 (0xf << 3) /* must be 111b for R/W */
-
int cpu_init (void)
{
/*
@@ -116,7 +73,7 @@
/* turn off I/D-cache */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(C1_DC | C1_IC);
+ i &= ~(CR_C | CR_I);
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
/* flush I/D-cache */
@@ -137,21 +94,21 @@
{
ulong reg;
- reg = read_p15_c1 (); /* get control reg. */
+ reg = get_cr (); /* get control reg. */
cp_delay ();
- write_p15_c1 (reg | C1_IC);
+ set_cr (reg | CR_I);
}
void icache_disable (void)
{
ulong reg;
- reg = read_p15_c1 ();
+ reg = get_cr ();
cp_delay ();
- write_p15_c1 (reg & ~C1_IC);
+ set_cr (reg & ~CR_I);
}
int icache_status (void)
{
- return (read_p15_c1 () & C1_IC) != 0;
+ return (get_cr () & CR_I) != 0;
}