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-rw-r--r--arch/powerpc/include/asm/kexec.h160
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
new file mode 100644
index 000000000000..acdcdc66f1b6
--- /dev/null
+++ b/arch/powerpc/include/asm/kexec.h
@@ -0,0 +1,160 @@
1#ifndef _ASM_POWERPC_KEXEC_H
2#define _ASM_POWERPC_KEXEC_H
3#ifdef __KERNEL__
4
5/*
6 * Maximum page that is mapped directly into kernel memory.
7 * XXX: Since we copy virt we can use any page we allocate
8 */
9#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
10
11/*
12 * Maximum address we can reach in physical address mode.
13 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
14 */
15#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
16
17/* Maximum address we can use for the control code buffer */
18#ifdef __powerpc64__
19#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
20#else
21/* TASK_SIZE, probably left over from use_mm ?? */
22#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
23#endif
24
25#define KEXEC_CONTROL_CODE_SIZE 4096
26
27/* The native architecture */
28#ifdef __powerpc64__
29#define KEXEC_ARCH KEXEC_ARCH_PPC64
30#else
31#define KEXEC_ARCH KEXEC_ARCH_PPC
32#endif
33
34#ifndef __ASSEMBLY__
35#include <linux/cpumask.h>
36
37typedef void (*crash_shutdown_t)(void);
38
39#ifdef CONFIG_KEXEC
40
41#ifdef __powerpc64__
42/*
43 * This function is responsible for capturing register states if coming
44 * via panic or invoking dump using sysrq-trigger.
45 */
46static inline void crash_setup_regs(struct pt_regs *newregs,
47 struct pt_regs *oldregs)
48{
49 if (oldregs)
50 memcpy(newregs, oldregs, sizeof(*newregs));
51 else {
52 /* FIXME Merge this with xmon_save_regs ?? */
53 unsigned long tmp1, tmp2;
54 __asm__ __volatile__ (
55 "std 0,0(%2)\n"
56 "std 1,8(%2)\n"
57 "std 2,16(%2)\n"
58 "std 3,24(%2)\n"
59 "std 4,32(%2)\n"
60 "std 5,40(%2)\n"
61 "std 6,48(%2)\n"
62 "std 7,56(%2)\n"
63 "std 8,64(%2)\n"
64 "std 9,72(%2)\n"
65 "std 10,80(%2)\n"
66 "std 11,88(%2)\n"
67 "std 12,96(%2)\n"
68 "std 13,104(%2)\n"
69 "std 14,112(%2)\n"
70 "std 15,120(%2)\n"
71 "std 16,128(%2)\n"
72 "std 17,136(%2)\n"
73 "std 18,144(%2)\n"
74 "std 19,152(%2)\n"
75 "std 20,160(%2)\n"
76 "std 21,168(%2)\n"
77 "std 22,176(%2)\n"
78 "std 23,184(%2)\n"
79 "std 24,192(%2)\n"
80 "std 25,200(%2)\n"
81 "std 26,208(%2)\n"
82 "std 27,216(%2)\n"
83 "std 28,224(%2)\n"
84 "std 29,232(%2)\n"
85 "std 30,240(%2)\n"
86 "std 31,248(%2)\n"
87 "mfmsr %0\n"
88 "std %0, 264(%2)\n"
89 "mfctr %0\n"
90 "std %0, 280(%2)\n"
91 "mflr %0\n"
92 "std %0, 288(%2)\n"
93 "bl 1f\n"
94 "1: mflr %1\n"
95 "std %1, 256(%2)\n"
96 "mtlr %0\n"
97 "mfxer %0\n"
98 "std %0, 296(%2)\n"
99 : "=&r" (tmp1), "=&r" (tmp2)
100 : "b" (newregs)
101 : "memory");
102 }
103}
104#else
105/*
106 * Provide a dummy definition to avoid build failures. Will remain
107 * empty till crash dump support is enabled.
108 */
109static inline void crash_setup_regs(struct pt_regs *newregs,
110 struct pt_regs *oldregs) { }
111#endif /* !__powerpc64 __ */
112
113extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
114 master to copy new code to 0 */
115extern int crashing_cpu;
116extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
117extern cpumask_t cpus_in_sr;
118static inline int kexec_sr_activated(int cpu)
119{
120 return cpu_isset(cpu,cpus_in_sr);
121}
122
123struct kimage;
124struct pt_regs;
125extern void default_machine_kexec(struct kimage *image);
126extern int default_machine_kexec_prepare(struct kimage *image);
127extern void default_machine_crash_shutdown(struct pt_regs *regs);
128extern int crash_shutdown_register(crash_shutdown_t handler);
129extern int crash_shutdown_unregister(crash_shutdown_t handler);
130
131extern void machine_kexec_simple(struct kimage *image);
132extern void crash_kexec_secondary(struct pt_regs *regs);
133extern int overlaps_crashkernel(unsigned long start, unsigned long size);
134extern void reserve_crashkernel(void);
135
136#else /* !CONFIG_KEXEC */
137static inline int kexec_sr_activated(int cpu) { return 0; }
138static inline void crash_kexec_secondary(struct pt_regs *regs) { }
139
140static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
141{
142 return 0;
143}
144
145static inline void reserve_crashkernel(void) { ; }
146
147static inline int crash_shutdown_register(crash_shutdown_t handler)
148{
149 return 0;
150}
151
152static inline int crash_shutdown_unregister(crash_shutdown_t handler)
153{
154 return 0;
155}
156
157#endif /* CONFIG_KEXEC */
158#endif /* ! __ASSEMBLY__ */
159#endif /* __KERNEL__ */
160#endif /* _ASM_POWERPC_KEXEC_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-19 11:11:49 -0500