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zephyr/include/arch/arm64/structs.h

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kernel: add an architecture specific structs header Add the ability to define architecture specific structures, notably the ability to extend struct _cpu with per-CPU arch-specific stuff that can be accessed with _current_cpu->arch.* similarly to _current->arch.* for per-thead architecture data. This is opt-in for architectures that want to benefit from this, otherwise empty defaults are provided. A placeholder for ARM64 is included to show the pattern. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2021-04-15 16:27:45 -04:00
/*
* Copyright (c) BayLibre SAS
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_ARM64_STRUCTS_H_
#define ZEPHYR_INCLUDE_ARM64_STRUCTS_H_
/* Per CPU architecture specifics */
struct _cpu_arch {
arm64: FPU context switching support This adds FPU sharing support with a lazy context switching algorithm. Every thread is allowed to use FPU/SIMD registers. In fact, the compiler may insert FPU reg accesses in anycontext to optimize even non-FP code unless the -mgeneral-regs-only compiler flag is used, but Zephyr currently doesn't support such a build. It is therefore possible to do FP access in IRS as well with this patch although IRQs are then disabled to prevent nested IRQs in such cases. Because the thread object grows in size, some tests have to be adjusted. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2021-04-07 23:31:44 -04:00
#ifdef CONFIG_FPU_SHARING
struct k_thread *fpu_owner;
#endif
kernel: add an architecture specific structs header Add the ability to define architecture specific structures, notably the ability to extend struct _cpu with per-CPU arch-specific stuff that can be accessed with _current_cpu->arch.* similarly to _current->arch.* for per-thead architecture data. This is opt-in for architectures that want to benefit from this, otherwise empty defaults are provided. A placeholder for ARM64 is included to show the pattern. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2021-04-15 16:27:45 -04:00
};
#endif /* ZEPHYR_INCLUDE_ARM64_STRUCTS_H_ */
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