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author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-12 22:28:04 -0500 |
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committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 09:13:03 +0200 |
commit | ea0364f1bbfed1e3ea711147420875cf338fe77a (patch) | |
tree | 15c051bc4d2e94c1661c73e1b87c22c7beda7c24 /arch/arm/lib/cache-cp15.c | |
parent | 89f39e177e7b0152aa1d3152baa25d986e36cdcf (diff) | |
download | u-boot-imx-ea0364f1bbfed1e3ea711147420875cf338fe77a.zip u-boot-imx-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.gz u-boot-imx-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.bz2 |
Move lib_$ARCH directories to arch/$ARCH/lib
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk
This change is intended to clean up the top-level directory structure
and more closely mimic Linux's directory organization.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/arm/lib/cache-cp15.c')
-rw-r--r-- | arch/arm/lib/cache-cp15.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c new file mode 100644 index 0000000..62ed54f --- /dev/null +++ b/arch/arm/lib/cache-cp15.c @@ -0,0 +1,120 @@ +/* + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/system.h> + +#if !(defined(CONFIG_SYS_NO_ICACHE) && defined(CONFIG_SYS_NO_DCACHE)) +static void cp_delay (void) +{ + volatile int i; + + /* copro seems to need some delay between reading and writing */ + for (i = 0; i < 100; i++) + nop(); +} + +/* 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); +} +#endif + +#ifdef CONFIG_SYS_NO_ICACHE +void icache_enable (void) +{ + return; +} + +void icache_disable (void) +{ + return; +} + +int icache_status (void) +{ + return 0; /* always off */ +} +#else +void icache_enable(void) +{ + cache_enable(CR_I); +} + +void icache_disable(void) +{ + cache_disable(CR_I); +} + +int icache_status(void) +{ + return (get_cr() & CR_I) != 0; +} +#endif + +#ifdef CONFIG_SYS_NO_DCACHE +void dcache_enable (void) +{ + return; +} + +void dcache_disable (void) +{ + return; +} + +int dcache_status (void) +{ + return 0; /* always off */ +} +#else +void dcache_enable(void) +{ + cache_enable(CR_C); +} + +void dcache_disable(void) +{ + cache_disable(CR_C); +} + +int dcache_status(void) +{ + return (get_cr() & CR_C) != 0; +} +#endif |