1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright IBM Corp. 2005
5 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
12 #include <asm/processor.h>
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.
20 /* Maximum physical address we can use pages from */
21 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
23 /* Maximum address we can reach in physical address mode */
24 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
26 /* Maximum address we can use for the control pages */
27 /* Not more than 2GB */
28 #define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
30 /* Allocate control page with GFP_DMA */
31 #define KEXEC_CONTROL_MEMORY_GFP GFP_DMA
33 /* Maximum address we can use for the crash control pages */
34 #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
36 /* Allocate one page for the pdp and the second for the code */
37 #define KEXEC_CONTROL_PAGE_SIZE 4096
39 /* Alignment of crashkernel memory */
40 #define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
42 /* The native architecture */
43 #define KEXEC_ARCH KEXEC_ARCH_S390
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) { }
50 struct s390_load_data {
51 /* Pointer to the kernel buffer. Used to register cmdline etc.. */
54 /* Total size of loaded segments in memory. Used as an offset. */
57 /* Load address of initrd. Used to register INITRD_START in kernel. */
58 unsigned long initrd_load_addr;
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);
69 extern const struct kexec_file_ops s390_kexec_image_ops;
70 extern const struct kexec_file_ops s390_kexec_elf_ops;
72 #endif /*_S390_KEXEC_H */