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#ifndef SYS_SCHEDULE_H
#define SYS_SCHEDULE_H
#define TQUEUE_MAX 0x100
#define STACK_SIZE 0x4000
#define TQUEUE_CNT 3
#define PRIORITIES 8
#define MAX_THREADS TQUEUE_MAX*PRIORITIES*TQUEUE_CNT
enum ThreadStatus {
THREAD_READY = 0,
THREAD_MWAIT = 1,
THREAD_SWAIT = 2,
};
struct Thread {
void* pc;
void* sp; // Store r0-r12,lr on stack
unsigned long sp_base;
unsigned long cpsr;
unsigned long pid;
unsigned char priority;
unsigned char preempt;
unsigned short status;
void* mptr;
unsigned long offset;
unsigned char old_priority;
unsigned char c_reserved;
unsigned short s_reserved;
};
struct ThreadEntry {
struct Thread* thread;
struct ThreadEntry* prev;
struct ThreadEntry* next;
};
struct ThreadEntryIterator {
struct ThreadEntry* entry;
};
struct ThreadQueue {
struct ThreadEntry entry[TQUEUE_MAX];
struct ThreadEntryIterator read;
struct ThreadEntryIterator write;
};
struct Scheduler {
struct Thread* rthread;
struct ThreadQueue ready[PRIORITIES];
struct ThreadQueue mwait[PRIORITIES];
struct ThreadQueue swait[PRIORITIES];
};
void init_scheduler(void);
void add_thread(void* pc, void* arg, unsigned char priority);
void uart_scheduler(void);
struct Thread* next_thread(void);
extern void schedule(void);
extern void cleanup(void);
void yield(void);
void sched_mutex_yield(void* m);
void sched_mutex_resurrect(void* m);
#endif
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