arch/s390/include/asm/extmem.h

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

File Facts

System
Linux kernel
Corpus path
arch/s390/include/asm/extmem.h
Extension
.h
Size
1066 bytes
Lines
40
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

#ifndef _ASM_S390X_DCSS_H
#define _ASM_S390X_DCSS_H
#ifndef __ASSEMBLER__

/*
 * DCSS segment is defined as a contiguous range of pages using DEFSEG command.
 * The range start and end is a page number with a value less than or equal to
 * 0x7ffffff (see CP Commands and Utilities Reference).
 */
#define MAX_DCSS_ADDR	(512UL * SZ_1G)

/* possible values for segment type as returned by segment_info */
#define SEG_TYPE_SW 0
#define SEG_TYPE_EW 1
#define SEG_TYPE_SR 2
#define SEG_TYPE_ER 3
#define SEG_TYPE_SN 4
#define SEG_TYPE_EN 5
#define SEG_TYPE_SC 6
#define SEG_TYPE_EWEN 7

#define SEGMENT_SHARED 0
#define SEGMENT_EXCLUSIVE 1

int segment_load (char *name, int segtype, unsigned long *addr, unsigned long *length);
void segment_unload(char *name);
void segment_save(char *name);
int segment_type (char* name);
int segment_modify_shared (char *name, int do_nonshared);
void segment_warning(int rc, char *seg_name);

#endif
#endif

Annotation

Implementation Notes