diff options
Diffstat (limited to 'cpu/pxa/cpu.c')
| -rw-r--r-- | cpu/pxa/cpu.c | 62 |
1 files changed, 9 insertions, 53 deletions
diff --git a/cpu/pxa/cpu.c b/cpu/pxa/cpu.c index e27b6b9..ab58d39 100644 --- a/cpu/pxa/cpu.c +++ b/cpu/pxa/cpu.c @@ -39,6 +39,8 @@ DECLARE_GLOBAL_DATA_PTR; #endif +static void cache_flush(void); + int cpu_init (void) { /* @@ -60,17 +62,14 @@ int cleanup_before_linux (void) * just disable everything that can disturb booting linux */ - 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(); return (0); } @@ -87,55 +86,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return (0); } -/* cache_bit must be either CR_I or CR_C */ -static void cache_enable(uint32_t cache_bit) -{ - uint32_t reg; - - reg = get_cr(); /* get control reg. */ - cp_delay(); - set_cr(reg | cache_bit); -} - -/* cache_bit must be either CR_I or CR_C */ -static void cache_disable(uint32_t cache_bit) -{ - uint32_t reg; - - reg = get_cr(); - cp_delay(); - set_cr(reg & ~cache_bit); -} - -void icache_enable(void) -{ - cache_enable(CR_I); -} - -void icache_disable(void) +/* flush I/D-cache */ +static void cache_flush (void) { - cache_disable(CR_I); -} + unsigned long i = 0; -int icache_status(void) -{ - return (get_cr() & CR_I) != 0; -} - -/* we will never enable dcache, because we have to setup MMU first */ -void dcache_enable (void) -{ - return; -} - -void dcache_disable (void) -{ - return; -} - -int dcache_status (void) -{ - return 0; /* always off */ + asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i)); } #ifndef CONFIG_CPU_MONAHANS |