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/* SPDX-License-Identifier: GPL-2.0 */
/*
* definitions for external memory segment support
* Copyright IBM Corp. 2003
*/
#ifndef _ASM_S390X_DCSS_H
#define _ASM_S390X_DCSS_H
#ifndef __ASSEMBLY__
/*
* 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
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