diff options
| author | Linus Walleij <linus.walleij@stericsson.com> | 2009-09-15 17:30:37 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-15 22:11:05 +0100 |
| commit | bc581770cfdd8c17ea17d324dc05e2f9c599e7ca (patch) | |
| tree | c6d2c2eb82d8a6c6851de0ecc7d8c0e63e026266 /arch/arm/include | |
| parent | 18240904960a39e582ced8ba8ececb10b8c22dd3 (diff) | |
ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3
This adds the TCM interface to Linux, when active, it will
detect and report TCM memories and sizes early in boot if
present, introduce generic TCM memory handling, provide a
generic TCM memory pool and select TCM memory for the U300
platform.
See the Documentation/arm/tcm.txt for documentation.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/cputype.h | 5 | ||||
| -rw-r--r-- | arch/arm/include/asm/tcm.h | 31 |
2 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index b3e656c6fb7..54a1f1d76b1 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -63,6 +63,11 @@ static inline unsigned int __attribute_const__ read_cpuid_cachetype(void) return read_cpuid(CPUID_CACHETYPE); } +static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void) +{ + return read_cpuid(CPUID_TCM); +} + /* * Intel's XScale3 core supports some v6 features (supersections, L2) * but advertises itself as v5 as it does not support the v6 ISA. For diff --git a/arch/arm/include/asm/tcm.h b/arch/arm/include/asm/tcm.h new file mode 100644 index 00000000000..5929ef5d927 --- /dev/null +++ b/arch/arm/include/asm/tcm.h @@ -0,0 +1,31 @@ +/* + * + * Copyright (C) 2008-2009 ST-Ericsson AB + * License terms: GNU General Public License (GPL) version 2 + * + * Author: Rickard Andersson <rickard.andersson@stericsson.com> + * Author: Linus Walleij <linus.walleij@stericsson.com> + * + */ +#ifndef __ASMARM_TCM_H +#define __ASMARM_TCM_H + +#ifndef CONFIG_HAVE_TCM +#error "You should not be including tcm.h unless you have a TCM!" +#endif + +#include <linux/compiler.h> + +/* Tag variables with this */ +#define __tcmdata __section(.tcm.data) +/* Tag constants with this */ +#define __tcmconst __section(.tcm.rodata) +/* Tag functions inside TCM called from outside TCM with this */ +#define __tcmfunc __attribute__((long_call)) __section(.tcm.text) noinline +/* Tag function inside TCM called from inside TCM with this */ +#define __tcmlocalfunc __section(.tcm.text) + +void *tcm_alloc(size_t len); +void tcm_free(void *addr, size_t len); + +#endif |