2 * include/asm-s390/kexec.h
4 * (C) Copyright IBM Corp. 2005
6 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
13 #include <asm/processor.h>
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.
21 /* Maximum physical address we can use pages from */
22 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
24 /* Maximum address we can reach in physical address mode */
25 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
27 /* Maximum address we can use for the control pages */
28 /* Not more than 2GB */
29 #define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
31 /* Maximum address we can use for the crash control pages */
32 #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
34 /* Allocate one page for the pdp and the second for the code */
35 #define KEXEC_CONTROL_PAGE_SIZE 4096
37 /* Alignment of crashkernel memory */
38 #define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
40 /* The native architecture */
41 #define KEXEC_ARCH KEXEC_ARCH_S390
44 * Size for s390x ELF notes per CPU
46 * Seven notes plus zero note at the end: prstatus, fpregset, timer,
47 * tod_cmp, tod_reg, control regs, and prefix
49 #define KEXEC_NOTE_BYTES \
50 (ALIGN(sizeof(struct elf_note), 4) * 8 + \
51 ALIGN(sizeof("CORE"), 4) * 7 + \
52 ALIGN(sizeof(struct elf_prstatus), 4) + \
53 ALIGN(sizeof(elf_fpregset_t), 4) + \
54 ALIGN(sizeof(u64), 4) + \
55 ALIGN(sizeof(u64), 4) + \
56 ALIGN(sizeof(u32), 4) + \
57 ALIGN(sizeof(u64) * 16, 4) + \
58 ALIGN(sizeof(u32), 4) \
61 /* Provide a dummy definition to avoid build failures. */
62 static inline void crash_setup_regs(struct pt_regs *newregs,
63 struct pt_regs *oldregs) { }
65 #endif /*_S390_KEXEC_H */