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LAB 4 IS DONE.

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winPond
2019-07-06 10:39:40 +08:00
parent 21dd0e1a51
commit e78b336ba8
113 changed files with 11622 additions and 0 deletions
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29
lab/kern/kclock.h Normal file
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/* See COPYRIGHT for copyright information. */
#ifndef JOS_KERN_KCLOCK_H
#define JOS_KERN_KCLOCK_H
#ifndef JOS_KERNEL
# error "This is a JOS kernel header; user programs should not #include it"
#endif
#define IO_RTC 0x070 /* RTC port */
#define MC_NVRAM_START 0xe /* start of NVRAM: offset 14 */
#define MC_NVRAM_SIZE 50 /* 50 bytes of NVRAM */
/* NVRAM bytes 7 & 8: base memory size */
#define NVRAM_BASELO (MC_NVRAM_START + 7) /* low byte; RTC off. 0x15 */
#define NVRAM_BASEHI (MC_NVRAM_START + 8) /* high byte; RTC off. 0x16 */
/* NVRAM bytes 9 & 10: extended memory size (between 1MB and 16MB) */
#define NVRAM_EXTLO (MC_NVRAM_START + 9) /* low byte; RTC off. 0x17 */
#define NVRAM_EXTHI (MC_NVRAM_START + 10) /* high byte; RTC off. 0x18 */
/* NVRAM bytes 38 and 39: extended memory size (between 16MB and 4G) */
#define NVRAM_EXT16LO (MC_NVRAM_START + 38) /* low byte; RTC off. 0x34 */
#define NVRAM_EXT16HI (MC_NVRAM_START + 39) /* high byte; RTC off. 0x35 */
unsigned mc146818_read(unsigned reg);
void mc146818_write(unsigned reg, unsigned datum);
#endif // !JOS_KERN_KCLOCK_H