| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |