138 lines
3.2 KiB
C
138 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2013-2016 Wind River Systems, Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Private kernel definitions (ARM)
|
|
*
|
|
* This file contains private kernel function definitions and various
|
|
* other definitions for the ARM Cortex-M3 processor architecture.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* this file is only meant to be included by kernel_structs.h */
|
|
|
|
#ifndef _kernel_arch_func__h_
|
|
#define _kernel_arch_func__h_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#ifndef _ASMLANGUAGE
|
|
extern void _FaultInit(void);
|
|
extern void _CpuIdleInit(void);
|
|
static ALWAYS_INLINE void kernel_arch_init(void)
|
|
{
|
|
_InterruptStackSetup();
|
|
_ExcSetup();
|
|
_FaultInit();
|
|
_CpuIdleInit();
|
|
}
|
|
|
|
static ALWAYS_INLINE void
|
|
_arch_switch_to_main_thread(struct k_thread *main_thread,
|
|
k_thread_stack_t *main_stack,
|
|
size_t main_stack_size, k_thread_entry_t _main)
|
|
{
|
|
/* get high address of the stack, i.e. its start (stack grows down) */
|
|
char *start_of_main_stack;
|
|
|
|
#ifdef CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
|
|
start_of_main_stack =
|
|
K_THREAD_STACK_BUFFER(main_stack) + main_stack_size -
|
|
MPU_GUARD_ALIGN_AND_SIZE;
|
|
#else
|
|
start_of_main_stack =
|
|
K_THREAD_STACK_BUFFER(main_stack) + main_stack_size;
|
|
#endif
|
|
start_of_main_stack = (void *)STACK_ROUND_DOWN(start_of_main_stack);
|
|
|
|
_current = main_thread;
|
|
|
|
/* the ready queue cache already contains the main thread */
|
|
|
|
#if defined(CONFIG_BUILTIN_STACK_GUARD)
|
|
/* Set PSPLIM register for built-in stack guarding of main thread. */
|
|
#if defined(CONFIG_CPU_CORTEX_M_HAS_SPLIM)
|
|
__set_PSPLIM((u32_t)main_stack);
|
|
#else
|
|
#error "Built-in PSP limit checks not supported by HW"
|
|
#endif
|
|
#endif /* CONFIG_BUILTIN_STACK_GUARD */
|
|
|
|
__asm__ __volatile__(
|
|
|
|
/* move to main() thread stack */
|
|
"msr PSP, %0 \t\n"
|
|
|
|
/* unlock interrupts */
|
|
#if defined(CONFIG_ARMV6_M_ARMV8_M_BASELINE)
|
|
"cpsie i \t\n"
|
|
#elif defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE)
|
|
"movs %%r1, #0 \n\t"
|
|
"msr BASEPRI, %%r1 \n\t"
|
|
#else
|
|
#error Unknown ARM architecture
|
|
#endif /* CONFIG_ARMV6_M_ARMV8_M_BASELINE */
|
|
|
|
#ifdef CONFIG_MPU_STACK_GUARD
|
|
/*
|
|
* if guard is enabled, make sure to set it before jumping to thread
|
|
* entry function
|
|
*/
|
|
"mov %%r0, %3 \t\n"
|
|
"push {r2, lr} \t\n"
|
|
"blx configure_mpu_stack_guard \t\n"
|
|
"pop {r2, lr} \t\n"
|
|
#endif
|
|
/* branch to _thread_entry(_main, 0, 0, 0) */
|
|
"mov %%r0, %1 \n\t"
|
|
"bx %2 \t\n"
|
|
|
|
/* never gets here */
|
|
|
|
:
|
|
: "r"(start_of_main_stack),
|
|
"r"(_main), "r"(_thread_entry),
|
|
"r"(main_thread)
|
|
|
|
: "r0", "r1", "sp"
|
|
);
|
|
|
|
CODE_UNREACHABLE;
|
|
}
|
|
|
|
static ALWAYS_INLINE void
|
|
_set_thread_return_value(struct k_thread *thread, unsigned int value)
|
|
{
|
|
thread->arch.swap_return_value = value;
|
|
}
|
|
|
|
extern void k_cpu_atomic_idle(unsigned int key);
|
|
|
|
#define _is_in_isr() _IsInIsr()
|
|
|
|
extern void _IntLibInit(void);
|
|
|
|
|
|
extern FUNC_NORETURN void _arm_userspace_enter(k_thread_entry_t user_entry,
|
|
void *p1, void *p2, void *p3,
|
|
u32_t stack_end,
|
|
u32_t stack_start);
|
|
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _kernel_arch_func__h_ */
|