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. */ 46 static inline void crash_setup_regs(struct pt_regs *newregs, 47 struct pt_regs *oldregs) { } 48 49 struct kimage; 50 struct 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 61 int kexec_file_add_purgatory(struct kimage *image, 62 struct s390_load_data *data); 63 int kexec_file_add_initrd(struct kimage *image, 64 struct s390_load_data *data, 65 char *initrd, unsigned long initrd_len); 66 int *kexec_file_update_kernel(struct kimage *iamge, 67 struct s390_load_data *data); 68 69 extern const struct kexec_file_ops s390_kexec_image_ops; 70 extern const struct kexec_file_ops s390_kexec_elf_ops; 71 72 #endif /*_S390_KEXEC_H */ 73