#include <common.h>
#include <command.h>
#include <asm/arch/pxa-regs.h>
+#include <asm/system.h>
+
+#ifdef CONFIG_USE_IRQ
+DECLARE_GLOBAL_DATA_PTR;
+#endif
int cpu_init (void)
{
* setup up stacks if necessary
*/
#ifdef CONFIG_USE_IRQ
- DECLARE_GLOBAL_DATA_PTR;
-
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
+ IRQ_STACK_START = _armboot_start - CONFIG_SYS_MALLOC_LEN - CONFIG_SYS_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
return (0);
}
-/* taken from blob */
-void icache_enable (void)
+/* cache_bit must be either CR_I or CR_C */
+static void cache_enable(uint32_t cache_bit)
{
- register u32 i;
-
- /* read control register */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
-
- /* set i-cache */
- i |= 0x1000;
+ uint32_t reg;
- /* write back to control register */
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ reg = get_cr(); /* get control reg. */
+ cp_delay();
+ set_cr(reg | cache_bit);
}
-void icache_disable (void)
+/* cache_bit must be either CR_I or CR_C */
+static void cache_disable(uint32_t cache_bit)
{
- register u32 i;
-
- /* read control register */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+ uint32_t reg;
- /* clear i-cache */
- i &= ~0x1000;
-
- /* write back to control register */
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
-
- /* flush i-cache */
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ reg = get_cr();
+ cp_delay();
+ set_cr(reg & ~cache_bit);
}
-int icache_status (void)
+void icache_enable(void)
{
- register u32 i;
+ cache_enable(CR_I);
+}
- /* read control register */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+void icache_disable(void)
+{
+ cache_disable(CR_I);
+}
- /* return bit */
- return (i & 0x1000);
+int icache_status(void)
+{
+ return (get_cr() & CR_I) != 0;
}
/* we will never enable dcache, because we have to setup MMU first */