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#include <asm/setup.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/* Allocate control page with GFP_DMA */
32#define KEXEC_CONTROL_MEMORY_GFP GFP_DMA
33
34/* Maximum address we can use for the crash control pages */
35#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
36
37/* Allocate one page for the pdp and the second for the code */
38#define KEXEC_CONTROL_PAGE_SIZE 4096
39
40/* Alignment of crashkernel memory */
41#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
42
43/* The native architecture */
44#define KEXEC_ARCH KEXEC_ARCH_S390
45
46/* Allow kexec_file to load a segment to 0 */
47#define KEXEC_BUF_MEM_UNKNOWN -1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
48
49/* Provide a dummy definition to avoid build failures. */
50static inline void crash_setup_regs(struct pt_regs *newregs,
51					struct pt_regs *oldregs) { }
52
53struct kimage;
54struct s390_load_data {
55	/* Pointer to the kernel buffer. Used to register cmdline etc.. */
56	void *kernel_buf;
57
58	/* Load address of the kernel_buf. */
59	unsigned long kernel_mem;
60
61	/* Parmarea in the kernel buffer. */
62	struct parmarea *parm;
63
64	/* Total size of loaded segments in memory. Used as an offset. */
65	size_t memsz;
66
67	struct ipl_report *report;
68};
69
70int s390_verify_sig(const char *kernel, unsigned long kernel_len);
71void *kexec_file_add_components(struct kimage *image,
72				int (*add_kernel)(struct kimage *image,
73						  struct s390_load_data *data));
74int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val,
75			 unsigned long addr);
76
77extern const struct kexec_file_ops s390_kexec_image_ops;
78extern const struct kexec_file_ops s390_kexec_elf_ops;
79
80#endif /*_S390_KEXEC_H */

 
 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/*
45 * Size for s390x ELF notes per CPU
46 *
47 * Seven notes plus zero note at the end: prstatus, fpregset, timer,
48 * tod_cmp, tod_reg, control regs, and prefix
49 */
50#define KEXEC_NOTE_BYTES \
51	(ALIGN(sizeof(struct elf_note), 4) * 8 + \
52	 ALIGN(sizeof("CORE"), 4) * 7 + \
53	 ALIGN(sizeof(struct elf_prstatus), 4) + \
54	 ALIGN(sizeof(elf_fpregset_t), 4) + \
55	 ALIGN(sizeof(u64), 4) + \
56	 ALIGN(sizeof(u64), 4) + \
57	 ALIGN(sizeof(u32), 4) + \
58	 ALIGN(sizeof(u64) * 16, 4) + \
59	 ALIGN(sizeof(u32), 4) \
60	)
61
62/* Provide a dummy definition to avoid build failures. */
63static inline void crash_setup_regs(struct pt_regs *newregs,
64					struct pt_regs *oldregs) { }
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
65
66#endif /*_S390_KEXEC_H */