diff options
Diffstat (limited to 'arch/s390/include/asm/extmem.h')
| -rw-r--r-- | arch/s390/include/asm/extmem.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/s390/include/asm/extmem.h b/arch/s390/include/asm/extmem.h index 6276002d76ba..225ee89c3f5e 100644 --- a/arch/s390/include/asm/extmem.h +++ b/arch/s390/include/asm/extmem.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * definitions for external memory segment support * Copyright IBM Corp. 2003 @@ -5,7 +6,14 @@ #ifndef _ASM_S390X_DCSS_H #define _ASM_S390X_DCSS_H -#ifndef __ASSEMBLY__ +#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 |