1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 2005 4 * 5 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com> 6 * 7 */ 8 9 #ifndef _S390_KEXEC_H 10 #define _S390_KEXEC_H 11 12 #include <asm/processor.h> 13 #include <asm/page.h> 14 /* 15 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. 16 * I.e. Maximum page that is mapped directly into kernel memory, 17 * and kmap is not required. 18 */ 19 20 /* Maximum physical address we can use pages from */ 21 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 22 23 /* Maximum address we can reach in physical address mode */ 24 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 25 26 /* Maximum address we can use for the control pages */ 27 /* Not more than 2GB */ 28 #define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31) 29 30 /* Allocate control page with GFP_DMA */ 31 #define KEXEC_CONTROL_MEMORY_GFP GFP_DMA 32 33 /* Maximum address we can use for the crash control pages */ 34 #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL) 35 36 /* Allocate one page for the pdp and the second for the code */ 37 #define KEXEC_CONTROL_PAGE_SIZE 4096 38 39 /* Alignment of crashkernel memory */ 40 #define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE 41 42 /* The native architecture */ 43 #define KEXEC_ARCH KEXEC_ARCH_S390 44 45 /* Provide a dummy definition to avoid build failures. */ 46 static inline void crash_setup_regs(struct pt_regs *newregs, 47 struct pt_regs *oldregs) { } 48 49 #endif /*_S390_KEXEC_H */ 50