| /* |
| * Copyright (c) 2016 Wind River Systems, Inc. |
| * Copyright (c) 2016 Cadence Design Systems, Inc. |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /* this file is only meant to be included by kernel_structs.h */ |
| |
| #ifndef ZEPHYR_ARCH_XTENSA_INCLUDE_KERNEL_ARCH_FUNC_H_ |
| #define ZEPHYR_ARCH_XTENSA_INCLUDE_KERNEL_ARCH_FUNC_H_ |
| |
| #ifndef _ASMLANGUAGE |
| #include <kernel_arch_data.h> |
| #include <string.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* stack alignment related macros: STACK_ALIGN_SIZE is defined above */ |
| |
| #define STACK_ROUND_UP(x) ROUND_UP(x, STACK_ALIGN_SIZE) |
| #define STACK_ROUND_DOWN(x) ROUND_DOWN(x, STACK_ALIGN_SIZE) |
| |
| extern void FatalErrorHandler(void); |
| extern void ReservedInterruptHandler(unsigned int intNo); |
| extern void z_xtensa_fatal_error(unsigned int reason, const z_arch_esf_t *esf); |
| |
| /* Defined in xtensa_context.S */ |
| extern void z_xt_coproc_init(void); |
| |
| extern K_THREAD_STACK_DEFINE(_interrupt_stack, CONFIG_ISR_STACK_SIZE); |
| |
| static ALWAYS_INLINE void arch_kernel_init(void) |
| { |
| _cpu_t *cpu0 = &_kernel.cpus[0]; |
| |
| cpu0->nested = 0; |
| cpu0->irq_stack = (Z_THREAD_STACK_BUFFER(_interrupt_stack) + |
| CONFIG_ISR_STACK_SIZE); |
| |
| /* The asm2 scheme keeps the kernel pointer in MISC0 for easy |
| * access. That saves 4 bytes of immediate value to store the |
| * address when compared to the legacy scheme. But in SMP |
| * this record is a per-CPU thing and having it stored in a SR |
| * already is a big win. |
| */ |
| WSR(CONFIG_XTENSA_KERNEL_CPU_PTR_SR, cpu0); |
| |
| #ifdef CONFIG_INIT_STACKS |
| memset(Z_THREAD_STACK_BUFFER(_interrupt_stack), 0xAA, |
| CONFIG_ISR_STACK_SIZE); |
| #endif |
| } |
| |
| void xtensa_switch(void *switch_to, void **switched_from); |
| |
| static inline void arch_switch(void *switch_to, void **switched_from) |
| { |
| return xtensa_switch(switch_to, switched_from); |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| static inline bool arch_is_in_isr(void) |
| { |
| return arch_curr_cpu()->nested != 0U; |
| } |
| #endif /* _ASMLANGUAGE */ |
| |
| #endif /* ZEPHYR_ARCH_XTENSA_INCLUDE_KERNEL_ARCH_FUNC_H_ */ |