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. */ 50 static inline void crash_setup_regs(struct pt_regs *newregs, 51 struct pt_regs *oldregs) { } 52 53 struct kimage; 54 struct 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 70 int s390_verify_sig(const char *kernel, unsigned long kernel_len); 71 void *kexec_file_add_components(struct kimage *image, 72 int (*add_kernel)(struct kimage *image, 73 struct s390_load_data *data)); 74 int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val, 75 unsigned long addr); 76 77 extern const struct kexec_file_ops s390_kexec_image_ops; 78 extern const struct kexec_file_ops s390_kexec_elf_ops; 79 80 #endif /*_S390_KEXEC_H */ 81