4f77c2ad53
Promote the private z_arch_* namespace, which specifies the interface between the core kernel and the architecture code, to a new top-level namespace named arch_*. This allows our documentation generation to create online documentation for this set of interfaces, and this set of interfaces is worth treating in a more formal way anyway. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/*
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* Copyright (c) 2016 Wind River Systems, Inc.
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* Copyright (c) 2016 Cadence Design Systems, Inc.
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* this file is only meant to be included by kernel_structs.h */
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#ifndef ZEPHYR_ARCH_XTENSA_INCLUDE_KERNEL_ARCH_FUNC_H_
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#define ZEPHYR_ARCH_XTENSA_INCLUDE_KERNEL_ARCH_FUNC_H_
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#ifndef _ASMLANGUAGE
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#include <kernel_arch_data.h>
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* stack alignment related macros: STACK_ALIGN_SIZE is defined above */
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#define STACK_ROUND_UP(x) ROUND_UP(x, STACK_ALIGN_SIZE)
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#define STACK_ROUND_DOWN(x) ROUND_DOWN(x, STACK_ALIGN_SIZE)
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extern void FatalErrorHandler(void);
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extern void ReservedInterruptHandler(unsigned int intNo);
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extern void z_xtensa_fatal_error(unsigned int reason, const z_arch_esf_t *esf);
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/* Defined in xtensa_context.S */
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extern void z_xt_coproc_init(void);
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extern K_THREAD_STACK_DEFINE(_interrupt_stack, CONFIG_ISR_STACK_SIZE);
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static ALWAYS_INLINE void arch_kernel_init(void)
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{
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_cpu_t *cpu0 = &_kernel.cpus[0];
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cpu0->nested = 0;
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cpu0->irq_stack = (Z_THREAD_STACK_BUFFER(_interrupt_stack) +
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CONFIG_ISR_STACK_SIZE);
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/* The asm2 scheme keeps the kernel pointer in MISC0 for easy
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* access. That saves 4 bytes of immediate value to store the
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* address when compared to the legacy scheme. But in SMP
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* this record is a per-CPU thing and having it stored in a SR
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* already is a big win.
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*/
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WSR(CONFIG_XTENSA_KERNEL_CPU_PTR_SR, cpu0);
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#ifdef CONFIG_INIT_STACKS
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memset(Z_THREAD_STACK_BUFFER(_interrupt_stack), 0xAA,
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CONFIG_ISR_STACK_SIZE);
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#endif
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}
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void xtensa_switch(void *switch_to, void **switched_from);
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static inline void arch_switch(void *switch_to, void **switched_from)
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{
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return xtensa_switch(switch_to, switched_from);
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}
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#ifdef __cplusplus
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}
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#endif
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static inline bool arch_is_in_isr(void)
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{
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return arch_curr_cpu()->nested != 0U;
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}
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#endif /* _ASMLANGUAGE */
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#endif /* ZEPHYR_ARCH_XTENSA_INCLUDE_KERNEL_ARCH_FUNC_H_ */
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