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authorWolfgang Denk <wd@denx.de>2009-04-05 23:04:30 +0200
committerWolfgang Denk <wd@denx.de>2009-04-05 23:04:30 +0200
commit712ac6a1a6909a58d6549fb220cc921a7e9f9979 (patch)
tree7391a68d2b81d9a9096e170b97bbfe0ed81c2c7f /cpu/arm720t
parent23e4af49e066a53cd3e3659b68ef90572d88de84 (diff)
parentc6fadb9c73a6a3e0c7f20696e978304a593a8d2d (diff)
Merge branch 'master' of git://git.denx.de/u-boot-arm
Diffstat (limited to 'cpu/arm720t')
-rw-r--r--cpu/arm720t/cpu.c120
1 files changed, 13 insertions, 107 deletions
diff --git a/cpu/arm720t/cpu.c b/cpu/arm720t/cpu.c
index 8166982e6a7..6c40903b7db 100644
--- a/cpu/arm720t/cpu.c
+++ b/cpu/arm720t/cpu.c
@@ -34,6 +34,11 @@
#include <command.h>
#include <clps7111.h>
#include <asm/hardware.h>
+#include <asm/system.h>
+
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+static void cache_flush(void);
+#endif
int cpu_init (void)
{
@@ -58,17 +63,14 @@ int cleanup_before_linux (void)
*/
#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
- unsigned long i;
-
disable_interrupts ();
/* turn off I-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~0x1000;
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ icache_disable();
+ dcache_disable();
/* flush I-cache */
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ cache_flush();
#ifdef CONFIG_ARM7_REVD
/* go to high speed */
IO_SYSCON3 = (IO_SYSCON3 & ~CLKCTL) | CLKCTL_73;
@@ -84,109 +86,13 @@ int cleanup_before_linux (void)
return 0;
}
-int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
-{
- disable_interrupts ();
- reset_cpu (0);
- /*NOTREACHED*/
- return (0);
-}
-
-/*
- * Instruction and Data cache enable and disable functions
- *
- */
-
-#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_NETARM) || defined(CONFIG_ARMADILLO)
-/* 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");
- /* printf("p15/c1 is = %08lx\n", value); */
- return value;
-}
-
-/* write to co-processor 15, register #1 (control register) */
-static void write_p15_c1(unsigned long value)
-{
- /* printf("write %08lx to p15/c1\n", value); */
- __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;
-
- /* copro seems to need some delay between reading and writing */
- 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_IDC (1<<2) /* icache and/or dcache off/on */
-#define C1_WRITE_BUFFER (1<<3) /* write buffer off/on */
-#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_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */
-
-void icache_enable (void)
-{
- ulong reg;
-
- reg = read_p15_c1 ();
- cp_delay ();
- write_p15_c1 (reg | C1_IDC);
-}
-
-void icache_disable (void)
-{
- ulong reg;
-
- reg = read_p15_c1 ();
- cp_delay ();
- write_p15_c1 (reg & ~C1_IDC);
-}
-
-int icache_status (void)
-{
- return (read_p15_c1 () & C1_IDC) != 0;
-}
-
-void dcache_enable (void)
-{
- ulong reg;
-
- reg = read_p15_c1 ();
- cp_delay ();
- write_p15_c1 (reg | C1_IDC);
-}
-
-void dcache_disable (void)
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- ulong reg;
-
- reg = read_p15_c1 ();
- cp_delay ();
- write_p15_c1 (reg & ~C1_IDC);
-}
+ unsigned long i = 0;
-int dcache_status (void)
-{
- return (read_p15_c1 () & C1_IDC) != 0;
+ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
}
#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
/* No specific cache setup for IntegratorAP/CM720T as yet */