xref: /linux/arch/s390/include/asm/extmem.h (revision 621cde16e49b3ecf7d59a8106a20aaebfb4a59a9)
1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2c6557e7fSMartin Schwidefsky /*
3c6557e7fSMartin Schwidefsky  *  definitions for external memory segment support
4a53c8fabSHeiko Carstens  *  Copyright IBM Corp. 2003
5c6557e7fSMartin Schwidefsky  */
6c6557e7fSMartin Schwidefsky 
7c6557e7fSMartin Schwidefsky #ifndef _ASM_S390X_DCSS_H
8c6557e7fSMartin Schwidefsky #define _ASM_S390X_DCSS_H
9c6557e7fSMartin Schwidefsky #ifndef __ASSEMBLY__
10c6557e7fSMartin Schwidefsky 
11*b2b15f07SAlexander Gordeev /*
12*b2b15f07SAlexander Gordeev  * DCSS segment is defined as a contiguous range of pages using DEFSEG command.
13*b2b15f07SAlexander Gordeev  * The range start and end is a page number with a value less than or equal to
14*b2b15f07SAlexander Gordeev  * 0x7ffffff (see CP Commands and Utilities Reference).
15*b2b15f07SAlexander Gordeev  */
16*b2b15f07SAlexander Gordeev #define MAX_DCSS_ADDR	(512UL * SZ_1G)
17*b2b15f07SAlexander Gordeev 
18c6557e7fSMartin Schwidefsky /* possible values for segment type as returned by segment_info */
19c6557e7fSMartin Schwidefsky #define SEG_TYPE_SW 0
20c6557e7fSMartin Schwidefsky #define SEG_TYPE_EW 1
21c6557e7fSMartin Schwidefsky #define SEG_TYPE_SR 2
22c6557e7fSMartin Schwidefsky #define SEG_TYPE_ER 3
23c6557e7fSMartin Schwidefsky #define SEG_TYPE_SN 4
24c6557e7fSMartin Schwidefsky #define SEG_TYPE_EN 5
25c6557e7fSMartin Schwidefsky #define SEG_TYPE_SC 6
26c6557e7fSMartin Schwidefsky #define SEG_TYPE_EWEN 7
27c6557e7fSMartin Schwidefsky 
28c6557e7fSMartin Schwidefsky #define SEGMENT_SHARED 0
29c6557e7fSMartin Schwidefsky #define SEGMENT_EXCLUSIVE 1
30c6557e7fSMartin Schwidefsky 
31c6557e7fSMartin Schwidefsky int segment_load (char *name, int segtype, unsigned long *addr, unsigned long *length);
32c6557e7fSMartin Schwidefsky void segment_unload(char *name);
33c6557e7fSMartin Schwidefsky void segment_save(char *name);
34c6557e7fSMartin Schwidefsky int segment_type (char* name);
35c6557e7fSMartin Schwidefsky int segment_modify_shared (char *name, int do_nonshared);
36c6557e7fSMartin Schwidefsky void segment_warning(int rc, char *seg_name);
37c6557e7fSMartin Schwidefsky 
38c6557e7fSMartin Schwidefsky #endif
39c6557e7fSMartin Schwidefsky #endif
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