1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright IBM Corp. 2005
5 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
12 #include <linux/module.h>
14 #include <asm/processor.h>
17 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
18 * I.e. Maximum page that is mapped directly into kernel memory,
19 * and kmap is not required.
22 /* Maximum physical address we can use pages from */
23 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
25 /* Maximum address we can reach in physical address mode */
26 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
28 /* Maximum address we can use for the control pages */
29 /* Not more than 2GB */
30 #define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
32 /* Allocate control page with GFP_DMA */
33 #define KEXEC_CONTROL_MEMORY_GFP GFP_DMA
35 /* Maximum address we can use for the crash control pages */
36 #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
38 /* Allocate one page for the pdp and the second for the code */
39 #define KEXEC_CONTROL_PAGE_SIZE 4096
41 /* Alignment of crashkernel memory */
42 #define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
44 /* The native architecture */
45 #define KEXEC_ARCH KEXEC_ARCH_S390
47 /* Provide a dummy definition to avoid build failures. */
48 static inline void crash_setup_regs(struct pt_regs *newregs,
49 struct pt_regs *oldregs) { }
52 struct s390_load_data {
53 /* Pointer to the kernel buffer. Used to register cmdline etc.. */
56 /* Total size of loaded segments in memory. Used as an offset. */
59 /* Load address of initrd. Used to register INITRD_START in kernel. */
60 unsigned long initrd_load_addr;
63 int kexec_file_add_purgatory(struct kimage *image,
64 struct s390_load_data *data);
65 int kexec_file_add_initrd(struct kimage *image,
66 struct s390_load_data *data,
67 char *initrd, unsigned long initrd_len);
68 int *kexec_file_update_kernel(struct kimage *iamge,
69 struct s390_load_data *data);
71 extern const struct kexec_file_ops s390_kexec_image_ops;
72 extern const struct kexec_file_ops s390_kexec_elf_ops;
74 #ifdef CONFIG_KEXEC_FILE
75 struct purgatory_info;
76 int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
78 const Elf_Shdr *relsec,
79 const Elf_Shdr *symtab);
80 #define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
82 #endif /*_S390_KEXEC_H */