-/* 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;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
-
-/* See also ARM920T Technical reference Manual */
-#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_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 */
-
-
-int cpu_init (void)
-{
- /*
- * setup up stacks if necessary
- */
-#ifdef CONFIG_USE_IRQ
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
- FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
-#endif
- return 0;
-}