/*
* Copyright IBM Corp. 2005
*
* Author(s): Rolf Adelsberger <[email protected]>
*
*/

#ifndef _S390_KEXEC_H
#define _S390_KEXEC_H

#include <asm/processor.h>
#include <asm/page.h>
/*
* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
* I.e. Maximum page that is mapped directly into kernel memory,
* and kmap is not required.
*/

/* Maximum physical address we can use pages from */
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)

/* Maximum address we can reach in physical address mode */
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)

/* Maximum address we can use for the control pages */
/* Not more than 2GB */
#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)

/* Maximum address we can use for the crash control pages */
#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)

/* Allocate one page for the pdp and the second for the code */
#define KEXEC_CONTROL_PAGE_SIZE 4096

/* Alignment of crashkernel memory */
#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE

/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_S390

/*
* Size for s390x ELF notes per CPU
*
* Seven notes plus zero note at the end: prstatus, fpregset, timer,
* tod_cmp, tod_reg, control regs, and prefix
*/
#define KEXEC_NOTE_BYTES \
(ALIGN(sizeof(struct elf_note), 4) * 8 + \
ALIGN(sizeof("CORE"), 4) * 7 + \
ALIGN(sizeof(struct elf_prstatus), 4) + \
ALIGN(sizeof(elf_fpregset_t), 4) + \
ALIGN(sizeof(u64), 4) + \
ALIGN(sizeof(u64), 4) + \
ALIGN(sizeof(u32), 4) + \
ALIGN(sizeof(u64) * 16, 4) + \
ALIGN(sizeof(u32), 4) \
)

/* Provide a dummy definition to avoid build failures. */
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs) { }

#endif /*_S390_KEXEC_H */