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 <linux/module.h> 13 14 #include <asm/processor.h> 15 #include <asm/page.h> 16 #include <asm/setup.h> 17 /* 18 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. 19 * I.e. Maximum page that is mapped directly into kernel memory, 20 * and kmap is not required. 21 */ 22 23 /* Maximum physical address we can use pages from */ 24 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 25 26 /* Maximum address we can reach in physical address mode */ 27 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 28 29 /* Maximum address we can use for the control pages */ 30 /* Not more than 2GB */ 31 #define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31) 32 33 /* Allocate control page with GFP_DMA */ 34 #define KEXEC_CONTROL_MEMORY_GFP (GFP_DMA | __GFP_NORETRY) 35 36 /* Maximum address we can use for the crash control pages */ 37 #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL) 38 39 /* Allocate one page for the pdp and the second for the code */ 40 #define KEXEC_CONTROL_PAGE_SIZE 4096 41 42 /* Alignment of crashkernel memory */ 43 #define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE 44 45 /* The native architecture */ 46 #define KEXEC_ARCH KEXEC_ARCH_S390 47 48 /* Allow kexec_file to load a segment to 0 */ 49 #define KEXEC_BUF_MEM_UNKNOWN -1 50 51 /* Provide a dummy definition to avoid build failures. */ 52 static inline void crash_setup_regs(struct pt_regs *newregs, 53 struct pt_regs *oldregs) { } 54 55 struct kimage; 56 struct s390_load_data { 57 /* Pointer to the kernel buffer. Used to register cmdline etc.. */ 58 void *kernel_buf; 59 60 /* Load address of the kernel_buf. */ 61 unsigned long kernel_mem; 62 63 /* Parmarea in the kernel buffer. */ 64 struct parmarea *parm; 65 66 /* Total size of loaded segments in memory. Used as an offset. */ 67 size_t memsz; 68 69 struct ipl_report *report; 70 }; 71 72 int s390_verify_sig(const char *kernel, unsigned long kernel_len); 73 void *kexec_file_add_components(struct kimage *image, 74 int (*add_kernel)(struct kimage *image, 75 struct s390_load_data *data)); 76 int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val, 77 unsigned long addr); 78 79 #define ARCH_HAS_KIMAGE_ARCH 80 81 struct kimage_arch { 82 void *ipl_buf; 83 }; 84 85 extern const struct kexec_file_ops s390_kexec_image_ops; 86 extern const struct kexec_file_ops s390_kexec_elf_ops; 87 88 #ifdef CONFIG_KEXEC_FILE 89 struct purgatory_info; 90 int arch_kexec_apply_relocations_add(struct purgatory_info *pi, 91 Elf_Shdr *section, 92 const Elf_Shdr *relsec, 93 const Elf_Shdr *symtab); 94 #define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add 95 #endif 96 #endif /*_S390_KEXEC_H */ 97