arch/s390/include/asm/crw.h

Source file repositories/reference/linux-study-clean/arch/s390/include/asm/crw.h

File Facts

System
Linux kernel
Corpus path
arch/s390/include/asm/crw.h
Extension
.h
Size
1858 bytes
Lines
56
Domain
Architecture Layer
Bucket
arch/s390
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct crw {
	__u32 res1 :  1;   /* reserved zero */
	__u32 slct :  1;   /* solicited */
	__u32 oflw :  1;   /* overflow */
	__u32 chn  :  1;   /* chained */
	__u32 rsc  :  4;   /* reporting source code */
	__u32 anc  :  1;   /* ancillary report */
	__u32 res2 :  1;   /* reserved zero */
	__u32 erc  :  6;   /* error-recovery code */
	__u32 rsid : 16;   /* reporting-source ID */
} __attribute__ ((packed));

typedef void (*crw_handler_t)(struct crw *, struct crw *, int);

extern int crw_register_handler(int rsc, crw_handler_t handler);
extern void crw_unregister_handler(int rsc);
extern void crw_handle_channel_report(void);
void crw_wait_for_channel_report(void);

#define NR_RSCS 16

#define CRW_RSC_MONITOR  0x2  /* monitoring facility */
#define CRW_RSC_SCH	 0x3  /* subchannel */
#define CRW_RSC_CPATH	 0x4  /* channel path */
#define CRW_RSC_CONFIG	 0x9  /* configuration-alert facility */
#define CRW_RSC_CSS	 0xB  /* channel subsystem */

#define CRW_ERC_EVENT	 0x00 /* event information pending */
#define CRW_ERC_AVAIL	 0x01 /* available */
#define CRW_ERC_INIT	 0x02 /* initialized */
#define CRW_ERC_TERROR	 0x03 /* temporary error */
#define CRW_ERC_IPARM	 0x04 /* installed parm initialized */
#define CRW_ERC_TERM	 0x05 /* terminal */
#define CRW_ERC_PERRN	 0x06 /* perm. error, fac. not init */
#define CRW_ERC_PERRI	 0x07 /* perm. error, facility init */
#define CRW_ERC_PMOD	 0x08 /* installed parameters modified */

#endif /* _ASM_S390_CRW_H */

Annotation

Implementation Notes