45af717a66
Improves context-switch performance. TLB invalidation and the nG bit are used conservatively. This could be improved in future work. Tested with tests/benchmarks/sched_userspace: BEFORE: ``` Swapping 2 threads: 161562583 cyc & 1000000 rounds -> 1615 ns per ctx Swapping 8 threads: 161569289 cyc & 1000000 rounds -> 1615 ns per ctx Swapping 16 threads: 161649163 cyc & 1000000 rounds -> 1616 ns per ctx Swapping 32 threads: 163487880 cyc & 1000000 rounds -> 1634 ns per ctx ``` AFTER: ``` Swapping 2 threads: 18129207 cyc & 1000000 rounds -> 181 ns per ctx Swapping 8 threads: 49702891 cyc & 1000000 rounds -> 497 ns per ctx Swapping 16 threads: 55898650 cyc & 1000000 rounds -> 558 ns per ctx Swapping 32 threads: 58059704 cyc & 1000000 rounds -> 580 ns per ctx ``` Signed-off-by: Henri Xavier <datacomos@huawei.com>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
|
|
* Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com<
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Private kernel definitions (ARM64)
|
|
*
|
|
* This file contains private kernel function definitions and various
|
|
* other definitions for the ARM Cortex-A processor architecture family.
|
|
*
|
|
* This file is also included by assembly language files which must #define
|
|
* _ASMLANGUAGE before including this header file. Note that kernel
|
|
* assembly source files obtains structure offset values via "absolute symbols"
|
|
* in the offsets.o module.
|
|
*/
|
|
|
|
#ifndef ZEPHYR_ARCH_ARM64_INCLUDE_KERNEL_ARCH_FUNC_H_
|
|
#define ZEPHYR_ARCH_ARM64_INCLUDE_KERNEL_ARCH_FUNC_H_
|
|
|
|
#include <kernel_arch_data.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#ifndef _ASMLANGUAGE
|
|
|
|
static ALWAYS_INLINE void arch_kernel_init(void)
|
|
{
|
|
}
|
|
|
|
static inline void arch_switch(void *switch_to, void **switched_from)
|
|
{
|
|
extern void z_arm64_context_switch(struct k_thread *new,
|
|
struct k_thread *old);
|
|
struct k_thread *new = switch_to;
|
|
struct k_thread *old = CONTAINER_OF(switched_from, struct k_thread,
|
|
switch_handle);
|
|
|
|
z_arm64_context_switch(new, old);
|
|
}
|
|
|
|
extern void z_arm64_fatal_error(z_arch_esf_t *esf, unsigned int reason);
|
|
extern void z_arm64_set_ttbr0(uint64_t ttbr0);
|
|
extern void z_arm64_mem_cfg_ipi(void);
|
|
|
|
#ifdef CONFIG_FPU_SHARING
|
|
void z_arm64_flush_local_fpu(void);
|
|
void z_arm64_flush_fpu_ipi(unsigned int cpu);
|
|
#endif
|
|
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* ZEPHYR_ARCH_ARM64_INCLUDE_KERNEL_ARCH_FUNC_H_ */
|