mirror of
https://github.com/plctlab/riscv-operating-system-mooc.git
synced 2025-12-05 23:23:26 +00:00
fd1d098906
The purpose is to facilitate porting to RV64. Signed-off-by: Wang Chen <wangchen20@iscas.ac.cn>
77 lines
1.2 KiB
C
77 lines
1.2 KiB
C
#ifndef __OS_H__
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#define __OS_H__
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#include "types.h"
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#include "riscv.h"
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#include "platform.h"
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#include <stddef.h>
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#include <stdarg.h>
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/* uart */
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extern int uart_putc(char ch);
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extern void uart_puts(char *s);
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extern int uart_getc(void);
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/* printf */
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extern int printf(const char* s, ...);
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extern void panic(char *s);
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/* memory management */
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extern void *page_alloc(int npages);
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extern void page_free(void *p);
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/* task management */
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struct context {
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/* ignore x0 */
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reg_t ra;
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reg_t sp;
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reg_t gp;
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reg_t tp;
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reg_t t0;
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reg_t t1;
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reg_t t2;
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reg_t s0;
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reg_t s1;
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reg_t a0;
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reg_t a1;
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reg_t a2;
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reg_t a3;
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reg_t a4;
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reg_t a5;
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reg_t a6;
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reg_t a7;
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reg_t s2;
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reg_t s3;
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reg_t s4;
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reg_t s5;
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reg_t s6;
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reg_t s7;
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reg_t s8;
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reg_t s9;
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reg_t s10;
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reg_t s11;
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reg_t t3;
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reg_t t4;
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reg_t t5;
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reg_t t6;
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// upon is trap frame
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// save the pc to run in next schedule cycle
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reg_t pc; // offset: 31 * sizeof(reg_t)
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};
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extern int task_create(void (*task)(void));
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extern void task_delay(volatile int count);
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extern void task_yield();
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/* plic */
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extern int plic_claim(void);
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extern void plic_complete(int irq);
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/* lock */
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extern int spin_lock(void);
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extern int spin_unlock(void);
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#endif /* __OS_H__ */
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