4a470114fa
Consistently place C++ use of extern "C" after all include directives, within the negative branch of _ASMLANGUAGE if used. Remove extern "C" support from files that don't declare objects or functions. In arch/arc/arch.h the extern "C" in the including context is left active during an include to avoid more complex restructuring. Background from issue #17997: Declarations that use C linkage should be placed within extern "C" so the language linkage is correct when the header is included by a C++ compiler. Similarly #include directives should be outside the extern "C" to ensure the language-specific default linkage is applied to any declarations provided by the included header. See: https://en.cppreference.com/w/cpp/language/language_linkage Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Cache helper functions and defines (ARC)
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*
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* This file contains cache related functions and definitions for the
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* ARCv2 processor architecture.
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*/
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#ifndef ZEPHYR_ARCH_ARC_INCLUDE_V2_CACHE_H_
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#define ZEPHYR_ARCH_ARC_INCLUDE_V2_CACHE_H_
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#include <arch/cpu.h>
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#ifndef _ASMLANGUAGE
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* i-cache defines for IC_CTRL register */
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#define IC_CACHE_ENABLE 0x00
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#define IC_CACHE_DISABLE 0x01
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#define IC_CACHE_DIRECT 0x00
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#define IC_CACHE_INDIRECT 0x20
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/*
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* @brief Initialize the I-cache
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*
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* Enables the i-cache and sets it to direct access mode.
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*/
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static ALWAYS_INLINE void z_icache_setup(void)
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{
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u32_t icache_config = (
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IC_CACHE_DIRECT | /* direct mapping (one-way assoc.) */
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IC_CACHE_ENABLE /* i-cache enabled */
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);
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u32_t val;
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val = z_arc_v2_aux_reg_read(_ARC_V2_I_CACHE_BUILD);
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val &= 0xff;
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if (val != 0U) { /* is i-cache present? */
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/* configure i-cache */
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z_arc_v2_aux_reg_write(_ARC_V2_IC_CTRL, icache_config);
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}
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ASMLANGUAGE */
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#endif /* ZEPHYR_ARCH_ARC_INCLUDE_V2_CACHE_H_ */
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