1/*
 2 * include/asm-s390/kexec.h
 3 *
 4 * (C) Copyright IBM Corp. 2005
 5 *
 6 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
 7 *
 8 */
 9
10#ifndef _S390_KEXEC_H
11#define _S390_KEXEC_H
12
13#include <asm/processor.h>
14#include <asm/page.h>
15/*
16 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
17 * I.e. Maximum page that is mapped directly into kernel memory,
18 * and kmap is not required.
19 */
20
21/* Maximum physical address we can use pages from */
22#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
23
24/* Maximum address we can reach in physical address mode */
25#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
26
27/* Maximum address we can use for the control pages */
28/* Not more than 2GB */
29#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
30
 
 
 
31/* Maximum address we can use for the crash control pages */
32#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
33
34/* Allocate one page for the pdp and the second for the code */
35#define KEXEC_CONTROL_PAGE_SIZE 4096
36
37/* Alignment of crashkernel memory */
38#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
39
40/* The native architecture */
41#define KEXEC_ARCH KEXEC_ARCH_S390
42
43/*
44 * Size for s390x ELF notes per CPU
45 *
46 * Seven notes plus zero note at the end: prstatus, fpregset, timer,
47 * tod_cmp, tod_reg, control regs, and prefix
48 */
49#define KEXEC_NOTE_BYTES \
50	(ALIGN(sizeof(struct elf_note), 4) * 8 + \
51	 ALIGN(sizeof("CORE"), 4) * 7 + \
52	 ALIGN(sizeof(struct elf_prstatus), 4) + \
53	 ALIGN(sizeof(elf_fpregset_t), 4) + \
54	 ALIGN(sizeof(u64), 4) + \
55	 ALIGN(sizeof(u64), 4) + \
56	 ALIGN(sizeof(u32), 4) + \
57	 ALIGN(sizeof(u64) * 16, 4) + \
58	 ALIGN(sizeof(u32), 4) \
59	)
60
61/* Provide a dummy definition to avoid build failures. */
62static inline void crash_setup_regs(struct pt_regs *newregs,
63					struct pt_regs *oldregs) { }
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
64
65#endif /*_S390_KEXEC_H */

 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. */
46static inline void crash_setup_regs(struct pt_regs *newregs,
47					struct pt_regs *oldregs) { }
48
49struct kimage;
50struct s390_load_data {
51	/* Pointer to the kernel buffer. Used to register cmdline etc.. */
52	void *kernel_buf;
53
54	/* Total size of loaded segments in memory. Used as an offset. */
55	size_t memsz;
56
57	/* Load address of initrd. Used to register INITRD_START in kernel. */
58	unsigned long initrd_load_addr;
59};
60
61int kexec_file_add_purgatory(struct kimage *image,
62			     struct s390_load_data *data);
63int kexec_file_add_initrd(struct kimage *image,
64			  struct s390_load_data *data,
65			  char *initrd, unsigned long initrd_len);
66int *kexec_file_update_kernel(struct kimage *iamge,
67			      struct s390_load_data *data);
68
69extern const struct kexec_file_ops s390_kexec_image_ops;
70extern const struct kexec_file_ops s390_kexec_elf_ops;
71
72#endif /*_S390_KEXEC_H */