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