From 2c451f7831208741d0ff7ca6046cffcd9ee49def Mon Sep 17 00:00:00 2001 From: Aneesh V Date: Thu, 16 Jun 2011 23:30:47 +0000 Subject: armv7: cache maintenance operations for armv7 - Add a framework for layered cache maintenance - separate out SOC specific outer cache maintenance from maintenance of caches known to CPU - Add generic ARMv7 cache maintenance operations that affect all caches known to ARMv7 CPUs. For instance in Cortex-A8 these opertions will affect both L1 and L2 caches. In Cortex-A9 these will affect only L1 cache - D-cache operations supported: - Invalidate entire D-cache - Invalidate D-cache range - Flush(clean & invalidate) entire D-cache - Flush D-cache range - I-cache operations supported: - Invalidate entire I-cache - Add maintenance functions for TLB, branch predictor array etc. - Enable -march=armv7-a so that armv7 assembly instructions can be used Signed-off-by: Aneesh V --- arch/arm/include/asm/armv7.h | 67 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 arch/arm/include/asm/armv7.h (limited to 'arch/arm/include/asm/armv7.h') diff --git a/arch/arm/include/asm/armv7.h b/arch/arm/include/asm/armv7.h new file mode 100644 index 0000000000..88b9c62dd3 --- /dev/null +++ b/arch/arm/include/asm/armv7.h @@ -0,0 +1,67 @@ +/* + * (C) Copyright 2010 + * Texas Instruments, + * Aneesh V + * + * 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 + */ +#ifndef ARMV7_H +#define ARMV7_H +#include + +/* CCSIDR */ +#define CCSIDR_LINE_SIZE_OFFSET 0 +#define CCSIDR_LINE_SIZE_MASK 0x7 +#define CCSIDR_ASSOCIATIVITY_OFFSET 3 +#define CCSIDR_ASSOCIATIVITY_MASK (0x3FF << 3) +#define CCSIDR_NUM_SETS_OFFSET 13 +#define CCSIDR_NUM_SETS_MASK (0x7FFF << 13) + +/* + * Values for InD field in CSSELR + * Selects the type of cache + */ +#define ARMV7_CSSELR_IND_DATA_UNIFIED 0 +#define ARMV7_CSSELR_IND_INSTRUCTION 1 + +/* Values for Ctype fields in CLIDR */ +#define ARMV7_CLIDR_CTYPE_NO_CACHE 0 +#define ARMV7_CLIDR_CTYPE_INSTRUCTION_ONLY 1 +#define ARMV7_CLIDR_CTYPE_DATA_ONLY 2 +#define ARMV7_CLIDR_CTYPE_INSTRUCTION_DATA 3 +#define ARMV7_CLIDR_CTYPE_UNIFIED 4 + +/* + * CP15 Barrier instructions + * Please note that we have separate barrier instructions in ARMv7 + * However, we use the CP15 based instructtions because we use + * -march=armv5 in U-Boot + */ +#define CP15ISB asm volatile ("mcr p15, 0, %0, c7, c5, 4" : : "r" (0)) +#define CP15DSB asm volatile ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)) +#define CP15DMB asm volatile ("mcr p15, 0, %0, c7, c10, 5" : : "r" (0)) + +void v7_outer_cache_enable(void); +void v7_outer_cache_disable(void); +void v7_outer_cache_flush_all(void); +void v7_outer_cache_inval_all(void); +void v7_outer_cache_flush_range(u32 start, u32 end); +void v7_outer_cache_inval_range(u32 start, u32 end); + +#endif -- cgit v1.2.1