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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright IBM Corp. 2005
*
* Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
*
*/
#ifndef _S390_KEXEC_H
#define _S390_KEXEC_H
#include <linux/module.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/setup.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)
/* Allocate control page with GFP_DMA */
#define KEXEC_CONTROL_MEMORY_GFP (GFP_DMA | __GFP_NORETRY)
/* 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
/* Allow kexec_file to load a segment to 0 */
#define KEXEC_BUF_MEM_UNKNOWN -1
/* Provide a dummy definition to avoid build failures. */
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs) { }
struct kimage;
struct s390_load_data {
/* Pointer to the kernel buffer. Used to register cmdline etc.. */
void *kernel_buf;
/* Load address of the kernel_buf. */
unsigned long kernel_mem;
/* Parmarea in the kernel buffer. */
struct parmarea *parm;
/* Total size of loaded segments in memory. Used as an offset. */
size_t memsz;
struct ipl_report *report;
};
int s390_verify_sig(const char *kernel, unsigned long kernel_len);
void *kexec_file_add_components(struct kimage *image,
int (*add_kernel)(struct kimage *image,
struct s390_load_data *data));
int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val,
unsigned long addr);
#define ARCH_HAS_KIMAGE_ARCH
struct kimage_arch {
void *ipl_buf;
};
extern const struct kexec_file_ops s390_kexec_image_ops;
extern const struct kexec_file_ops s390_kexec_elf_ops;
#ifdef CONFIG_KEXEC_FILE
struct purgatory_info;
int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
Elf_Shdr *section,
const Elf_Shdr *relsec,
const Elf_Shdr *symtab);
#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
#endif
#endif /*_S390_KEXEC_H */
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