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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef _ASM_POWERPC_KEXEC_H
2#define _ASM_POWERPC_KEXEC_H
3#ifdef __KERNEL__
4
5#ifdef CONFIG_FSL_BOOKE
6
7/*
8 * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory
9 * and therefore we can only deal with memory within this range
10 */
11#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
12#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
13#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
14
15#else
16
17/*
18 * Maximum page that is mapped directly into kernel memory.
19 * XXX: Since we copy virt we can use any page we allocate
20 */
21#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
22
23/*
24 * Maximum address we can reach in physical address mode.
25 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
26 */
27#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
28
29/* Maximum address we can use for the control code buffer */
30#ifdef __powerpc64__
31#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
32#else
33/* TASK_SIZE, probably left over from use_mm ?? */
34#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
35#endif
36#endif
37
38#define KEXEC_CONTROL_PAGE_SIZE 4096
39
40/* The native architecture */
41#ifdef __powerpc64__
42#define KEXEC_ARCH KEXEC_ARCH_PPC64
43#else
44#define KEXEC_ARCH KEXEC_ARCH_PPC
45#endif
46
47#define KEXEC_STATE_NONE 0
48#define KEXEC_STATE_IRQS_OFF 1
49#define KEXEC_STATE_REAL_MODE 2
50
51#ifndef __ASSEMBLY__
52#include <linux/cpumask.h>
53#include <asm/reg.h>
54
55typedef void (*crash_shutdown_t)(void);
56
57#ifdef CONFIG_KEXEC
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 cpumask_t cpus_in_sr;
77static inline int kexec_sr_activated(int cpu)
78{
79 return cpumask_test_cpu(cpu, &cpus_in_sr);
80}
81
82struct kimage;
83struct pt_regs;
84extern void default_machine_kexec(struct kimage *image);
85extern int default_machine_kexec_prepare(struct kimage *image);
86extern void default_machine_crash_shutdown(struct pt_regs *regs);
87extern int crash_shutdown_register(crash_shutdown_t handler);
88extern int crash_shutdown_unregister(crash_shutdown_t handler);
89
90extern void machine_kexec_simple(struct kimage *image);
91extern void crash_kexec_secondary(struct pt_regs *regs);
92extern int overlaps_crashkernel(unsigned long start, unsigned long size);
93extern void reserve_crashkernel(void);
94extern void machine_kexec_mask_interrupts(void);
95
96#else /* !CONFIG_KEXEC */
97static inline int kexec_sr_activated(int cpu) { return 0; }
98static inline void crash_kexec_secondary(struct pt_regs *regs) { }
99
100static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
101{
102 return 0;
103}
104
105static inline void reserve_crashkernel(void) { ; }
106
107static inline int crash_shutdown_register(crash_shutdown_t handler)
108{
109 return 0;
110}
111
112static inline int crash_shutdown_unregister(crash_shutdown_t handler)
113{
114 return 0;
115}
116
117#endif /* CONFIG_KEXEC */
118#endif /* ! __ASSEMBLY__ */
119#endif /* __KERNEL__ */
120#endif /* _ASM_POWERPC_KEXEC_H */