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/*
* Copyright (c) 2016 Wind River Systems, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _kernel_structs__h_
#define _kernel_structs__h_
#if !defined(_ASMLANGUAGE)
#include <kernel.h>
#include <atomic.h>
#include <misc/dlist.h>
#endif
#include <kernel_arch_data.h>
#if !defined(_ASMLANGUAGE)
#ifdef CONFIG_THREAD_MONITOR
struct __thread_entry {
_thread_entry_t pEntry;
void *parameter1;
void *parameter2;
void *parameter3;
};
#endif
/* can be used for creating 'dummy' threads, e.g. for pending on objects */
struct _thread_base {
/* this thread's entry in a ready/wait queue */
sys_dnode_t k_q_node;
/* execution flags */
int flags;
/* thread priority used to sort linked list */
int prio;
/* scheduler lock count */
atomic_t sched_locked;
/* data returned by APIs */
void *swap_data;
#ifdef CONFIG_NANO_TIMEOUTS
/* this thread's entry in a timeout queue */
struct _timeout timeout;
#endif
};
typedef struct _thread_base _thread_base_t;
struct k_thread {
struct _thread_base base;
/* defined by the architecture, but all archs need these */
struct _caller_saved caller_saved;
struct _callee_saved callee_saved;
/* static thread init data */
void *init_data;
/* abort function */
void (*fn_abort)(void);
#if defined(CONFIG_THREAD_MONITOR)
/* thread entry and parameters description */
struct __thread_entry *entry;
/* next item in list of all threads */
struct k_thread *next_thread;
#endif
#ifdef CONFIG_THREAD_CUSTOM_DATA
/* crude thread-local storage */
void *custom_data;
#endif
#ifdef CONFIG_ERRNO
/* per-thread errno variable */
int errno_var;
#endif
/* arch-specifics: must always be at the end */
struct _thread_arch arch;
};
typedef struct k_thread _thread_t;
struct _ready_q {
/* next thread to run if known, NULL otherwise */
struct k_thread *cache;
/* bitmap of priorities that contain at least one ready thread */
uint32_t prio_bmap[K_NUM_PRIO_BITMAPS];
/* ready queues, one per priority */
sys_dlist_t q[K_NUM_PRIORITIES];
};
struct _kernel {
/* nested interrupt count */
uint32_t nested;
/* interrupt stack pointer base */
char *irq_stack;
/* currently scheduled thread */
struct k_thread *current;
#ifdef CONFIG_SYS_CLOCK_EXISTS
/* queue of timeouts */
sys_dlist_t timeout_q;
#endif
#ifdef CONFIG_SYS_POWER_MANAGEMENT
int32_t idle; /* Number of ticks for kernel idling */
#endif
/*
* ready queue: can be big, keep after small fields, since some
* assembly (e.g. ARC) are limited in the encoding of the offset
*/
struct _ready_q ready_q;
#ifdef CONFIG_FP_SHARING
/*
* A 'current_sse' field does not exist in addition to the 'current_fp'
* field since it's not possible to divide the IA-32 non-integer
* registers into 2 distinct blocks owned by differing threads. In
* other words, given that the 'fxnsave/fxrstor' instructions
* save/restore both the X87 FPU and XMM registers, it's not possible
* for a thread to only "own" the XMM registers.
*/
/* thread (fiber or task) that owns the FP regs */
struct k_thread *current_fp;
#endif
#if defined(CONFIG_THREAD_MONITOR)
struct k_thread *threads; /* singly linked list of ALL fiber+tasks */
#endif
/* arch-specific part of _kernel */
struct _kernel_arch arch;
};
typedef struct _kernel _kernel_t;
extern struct _kernel _kernel;
#define _current _kernel.current
#define _ready_q _kernel.ready_q
#define _timeout_q _kernel.timeout_q
#define _threads _kernel.threads
#include <kernel_arch_func.h>
static ALWAYS_INLINE void
_set_thread_return_value_with_data(struct k_thread *thread,
unsigned int value,
void *data)
{
_set_thread_return_value(thread, value);
thread->base.swap_data = data;
}
#endif /* _ASMLANGUAGE */
#endif /* _kernel_structs__h_ */
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