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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 *));
76extern void crash_ipi_callback(struct pt_regs *);
77extern int crash_wake_offline;
78
79struct kimage;
80struct pt_regs;
81extern void default_machine_kexec(struct kimage *image);
82extern void default_machine_crash_shutdown(struct pt_regs *regs);
83extern int crash_shutdown_register(crash_shutdown_t handler);
84extern int crash_shutdown_unregister(crash_shutdown_t handler);
85
86extern void crash_kexec_secondary(struct pt_regs *regs);
87int __init overlaps_crashkernel(unsigned long start, unsigned long size);
88extern void reserve_crashkernel(void);
89extern void machine_kexec_mask_interrupts(void);
90
91static inline bool kdump_in_progress(void)
92{
93 return crashing_cpu >= 0;
94}
95
96void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer,
97 unsigned long start_address) __noreturn;
98
99#ifdef CONFIG_KEXEC_FILE
100extern const struct kexec_file_ops kexec_elf64_ops;
101
102#define ARCH_HAS_KIMAGE_ARCH
103
104struct kimage_arch {
105 struct crash_mem *exclude_ranges;
106
107 unsigned long backup_start;
108 void *backup_buf;
109 void *fdt;
110};
111
112char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
113 unsigned long cmdline_len);
114int setup_purgatory(struct kimage *image, const void *slave_code,
115 const void *fdt, unsigned long kernel_load_addr,
116 unsigned long fdt_load_addr);
117
118#ifdef CONFIG_PPC64
119struct kexec_buf;
120
121int load_crashdump_segments_ppc64(struct kimage *image,
122 struct kexec_buf *kbuf);
123int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
124 const void *fdt, unsigned long kernel_load_addr,
125 unsigned long fdt_load_addr);
126unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image);
127int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
128 unsigned long initrd_load_addr,
129 unsigned long initrd_len, const char *cmdline);
130#endif /* CONFIG_PPC64 */
131
132#endif /* CONFIG_KEXEC_FILE */
133
134#else /* !CONFIG_KEXEC_CORE */
135static inline void crash_kexec_secondary(struct pt_regs *regs) { }
136
137static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
138{
139 return 0;
140}
141
142static inline void reserve_crashkernel(void) { ; }
143
144static inline int crash_shutdown_register(crash_shutdown_t handler)
145{
146 return 0;
147}
148
149static inline int crash_shutdown_unregister(crash_shutdown_t handler)
150{
151 return 0;
152}
153
154static inline bool kdump_in_progress(void)
155{
156 return false;
157}
158
159static inline void crash_ipi_callback(struct pt_regs *regs) { }
160
161static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
162{
163}
164
165#endif /* CONFIG_KEXEC_CORE */
166
167#ifdef CONFIG_PPC_BOOK3S_64
168#include <asm/book3s/64/kexec.h>
169#endif
170
171#ifndef reset_sprs
172#define reset_sprs reset_sprs
173static inline void reset_sprs(void)
174{
175}
176#endif
177
178#endif /* ! __ASSEMBLY__ */
179#endif /* __KERNEL__ */
180#endif /* _ASM_POWERPC_KEXEC_H */