/* 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