diff options
Diffstat (limited to 'cpu/arm1176/cpu.c')
| -rw-r--r-- | cpu/arm1176/cpu.c | 103 | 
1 files changed, 2 insertions, 101 deletions
| diff --git a/cpu/arm1176/cpu.c b/cpu/arm1176/cpu.c index 1e94f7d6d..bfa437835 100644 --- a/cpu/arm1176/cpu.c +++ b/cpu/arm1176/cpu.c @@ -34,55 +34,10 @@  #include <common.h>  #include <command.h>  #include <s3c6400.h> +#include <asm/system.h>  static void cache_flush (void); -/* 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"); -	return value; -} - -/* write to co-processor 15, register #1 (control register) */ -static void write_p15_c1 (unsigned long 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; - -	/* Many OMAP regs need at least 2 nops  */ -	for (i = 0; i < 100; i++) -		__asm__ __volatile__("nop\n"); -} - -/* 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 */ -#define RESERVED_1	(0xf << 3)	/* must be 111b for R/W */ -  int cpu_init (void)  {  	return 0; @@ -102,6 +57,7 @@ int cleanup_before_linux (void)  	/* turn off I/D-cache */  	icache_disable();  	dcache_disable(); +	/* flush I/D-cache */  	cache_flush();  	return 0; @@ -123,61 +79,6 @@ void reset_cpu (ulong ignored)  	/*NOTREACHED*/  } -int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ -	disable_interrupts (); -	reset_cpu (0); -	/*NOTREACHED*/ -	return 0; -} - -void icache_enable (void) -{ -	ulong reg; - -	reg = read_p15_c1 ();	/* get control reg. */ -	cp_delay (); -	write_p15_c1 (reg | C1_IC); -} - -void icache_disable (void) -{ -	ulong reg; - -	reg = read_p15_c1 (); -	cp_delay (); -	write_p15_c1 (reg & ~C1_IC); -} - -int icache_status (void) -{ -	return (read_p15_c1 () & C1_IC) != 0; -} - -/* It makes no sense to use the dcache if the MMU is not enabled */ -void dcache_enable (void) -{ -	ulong reg; - -	reg = read_p15_c1 (); -	cp_delay (); -	write_p15_c1 (reg | C1_DC); -} - -void dcache_disable (void) -{ -	ulong reg; - -	reg = read_p15_c1 (); -	cp_delay (); -	write_p15_c1 (reg & ~C1_DC); -} - -int dcache_status (void) -{ -	return (read_p15_c1 () & C1_DC) != 0; -} -  /* flush I/D-cache */  static void cache_flush (void)  { |