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Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_KEXEC_H
3#define _ASM_POWERPC_KEXEC_H
4#ifdef __KERNEL__
5
6#if defined(CONFIG_FSL_BOOKE) || defined(CONFIG_44x)
7
8/*
9 * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory
10 * and therefore we can only deal with memory within this range
11 */
12#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
13#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
14#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
15
16#else
17
18/*
19 * Maximum page that is mapped directly into kernel memory.
20 * XXX: Since we copy virt we can use any page we allocate
21 */
22#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
23
24/*
25 * Maximum address we can reach in physical address mode.
26 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
27 */
28#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
29
30/* Maximum address we can use for the control code buffer */
31#ifdef __powerpc64__
32#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
33#else
34/* TASK_SIZE, probably left over from use_mm ?? */
35#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
36#endif
37#endif
38
39#define KEXEC_CONTROL_PAGE_SIZE 4096
40
41/* The native architecture */
42#ifdef __powerpc64__
43#define KEXEC_ARCH KEXEC_ARCH_PPC64
44#else
45#define KEXEC_ARCH KEXEC_ARCH_PPC
46#endif
47
48#define KEXEC_STATE_NONE 0
49#define KEXEC_STATE_IRQS_OFF 1
50#define KEXEC_STATE_REAL_MODE 2
51
52#ifndef __ASSEMBLY__
53#include <asm/reg.h>
54
55typedef void (*crash_shutdown_t)(void);
56
57#ifdef CONFIG_KEXEC_CORE
58
59/*
60 * This function is responsible for capturing register states if coming
61 * via panic or invoking dump using sysrq-trigger.
62 */
63static inline void crash_setup_regs(struct pt_regs *newregs,
64 struct pt_regs *oldregs)
65{
66 if (oldregs)
67 memcpy(newregs, oldregs, sizeof(*newregs));
68 else
69 ppc_save_regs(newregs);
70}
71
72extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
73 master to copy new code to 0 */
74extern int crashing_cpu;
75extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
76
77struct kimage;
78struct pt_regs;
79extern void default_machine_kexec(struct kimage *image);
80extern int default_machine_kexec_prepare(struct kimage *image);
81extern void default_machine_crash_shutdown(struct pt_regs *regs);
82extern int crash_shutdown_register(crash_shutdown_t handler);
83extern int crash_shutdown_unregister(crash_shutdown_t handler);
84
85extern void crash_kexec_secondary(struct pt_regs *regs);
86extern int overlaps_crashkernel(unsigned long start, unsigned long size);
87extern void reserve_crashkernel(void);
88extern void machine_kexec_mask_interrupts(void);
89
90static inline bool kdump_in_progress(void)
91{
92 return crashing_cpu >= 0;
93}
94
95#ifdef CONFIG_KEXEC_FILE
96extern struct kexec_file_ops kexec_elf64_ops;
97
98#ifdef CONFIG_IMA_KEXEC
99#define ARCH_HAS_KIMAGE_ARCH
100
101struct kimage_arch {
102 phys_addr_t ima_buffer_addr;
103 size_t ima_buffer_size;
104};
105#endif
106
107int setup_purgatory(struct kimage *image, const void *slave_code,
108 const void *fdt, unsigned long kernel_load_addr,
109 unsigned long fdt_load_addr);
110int setup_new_fdt(const struct kimage *image, void *fdt,
111 unsigned long initrd_load_addr, unsigned long initrd_len,
112 const char *cmdline);
113int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size);
114#endif /* CONFIG_KEXEC_FILE */
115
116#else /* !CONFIG_KEXEC_CORE */
117static inline void crash_kexec_secondary(struct pt_regs *regs) { }
118
119static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
120{
121 return 0;
122}
123
124static inline void reserve_crashkernel(void) { ; }
125
126static inline int crash_shutdown_register(crash_shutdown_t handler)
127{
128 return 0;
129}
130
131static inline int crash_shutdown_unregister(crash_shutdown_t handler)
132{
133 return 0;
134}
135
136static inline bool kdump_in_progress(void)
137{
138 return false;
139}
140
141#endif /* CONFIG_KEXEC_CORE */
142#endif /* ! __ASSEMBLY__ */
143#endif /* __KERNEL__ */
144#endif /* _ASM_POWERPC_KEXEC_H */