71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
#ifndef _CONTEXT_H_
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#define _CONTEXT_H_
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#include <stdint.h>
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#include "rtos/spinlock.h"
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struct register_context {
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uint32_t r0;
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uint32_t r1;
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uint32_t pc;
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uint32_t cpsr;
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uint32_t r2;
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uint32_t r3;
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uint32_t r4;
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uint32_t r5;
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uint32_t r6;
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uint32_t r7;
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uint32_t r8;
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uint32_t r9;
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uint32_t r10;
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uint32_t r11;
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uint32_t r12;
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uint32_t sp;
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uint32_t r14;
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};
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enum ctx_state {
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CONTEXT_NULL = 0,
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CONTEXT_RUNNING = 1,
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CONTEXT_READY = 2,
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CONTEXT_INTERRUPTED = 3,
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CONTEXT_SLEEP = 4,
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CONTEXT_SLEEP_QUEUE = 5,
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};
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struct context {
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/* regs *MUST* be first in struct! */
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struct register_context regs;
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void *stack;
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uint8_t state;
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uint8_t priority;
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/* next pointers for run & sleep queues */
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struct context *run_queue;
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struct context *sleep_queue;
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};
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extern struct context *current_context;
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void isr_context_yield(void);
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void context_yield(void);
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uint8_t isr_context_wait(struct spinlock *lock);
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uint8_t context_wait(struct spinlock *lock);
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uint8_t context_wait_queue(struct spinlock *lock, struct context **queue);
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uint8_t context_wait_pri_queue(struct spinlock *lock, struct context **queue);
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void isr_context_signal(struct context *c);
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void context_signal(struct context *c);
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uint32_t context_signal_queue(struct context **queue);
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void isr_context_interrupt(struct context *c);
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void context_interrupt(struct context *c);
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uint32_t context_interrupt_queue(struct context *c, struct context **queue);
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struct context * create_ctx(uint32_t stacksize, uint8_t priority, void (* code)(void *arg), void *arg);
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void init_context(void);
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#endif /* _CONTEXT_H_ */
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