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Michael Ellermane1df8702005-11-03 15:35:45 +11001#ifndef _ASM_POWERPC_KEXEC_H
2#define _ASM_POWERPC_KEXEC_H
Arnd Bergmann88ced032005-12-16 22:43:46 +01003#ifdef __KERNEL__
Michael Ellermane1df8702005-11-03 15:35:45 +11004
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
Michael Ellerman2babf5c2006-05-17 18:00:46 +100034#ifndef __ASSEMBLY__
Michael Ellermanb6f35b42006-07-05 14:39:43 +100035#include <linux/cpumask.h>
Michael Ellerman2babf5c2006-05-17 18:00:46 +100036
Michael Ellermancc532912005-12-04 18:39:43 +110037#ifdef CONFIG_KEXEC
38
Haren Myneni8385a6a2006-01-13 19:15:36 -080039#ifdef __powerpc64__
40/*
41 * This function is responsible for capturing register states if coming
42 * via panic or invoking dump using sysrq-trigger.
43 */
44static inline void crash_setup_regs(struct pt_regs *newregs,
45 struct pt_regs *oldregs)
46{
47 if (oldregs)
48 memcpy(newregs, oldregs, sizeof(*newregs));
49 else {
50 /* FIXME Merge this with xmon_save_regs ?? */
51 unsigned long tmp1, tmp2;
52 __asm__ __volatile__ (
53 "std 0,0(%2)\n"
54 "std 1,8(%2)\n"
55 "std 2,16(%2)\n"
56 "std 3,24(%2)\n"
57 "std 4,32(%2)\n"
58 "std 5,40(%2)\n"
59 "std 6,48(%2)\n"
60 "std 7,56(%2)\n"
61 "std 8,64(%2)\n"
62 "std 9,72(%2)\n"
63 "std 10,80(%2)\n"
64 "std 11,88(%2)\n"
65 "std 12,96(%2)\n"
66 "std 13,104(%2)\n"
67 "std 14,112(%2)\n"
68 "std 15,120(%2)\n"
69 "std 16,128(%2)\n"
70 "std 17,136(%2)\n"
71 "std 18,144(%2)\n"
72 "std 19,152(%2)\n"
73 "std 20,160(%2)\n"
74 "std 21,168(%2)\n"
75 "std 22,176(%2)\n"
76 "std 23,184(%2)\n"
77 "std 24,192(%2)\n"
78 "std 25,200(%2)\n"
79 "std 26,208(%2)\n"
80 "std 27,216(%2)\n"
81 "std 28,224(%2)\n"
82 "std 29,232(%2)\n"
83 "std 30,240(%2)\n"
84 "std 31,248(%2)\n"
85 "mfmsr %0\n"
86 "std %0, 264(%2)\n"
87 "mfctr %0\n"
88 "std %0, 280(%2)\n"
89 "mflr %0\n"
90 "std %0, 288(%2)\n"
91 "bl 1f\n"
92 "1: mflr %1\n"
93 "std %1, 256(%2)\n"
94 "mtlr %0\n"
95 "mfxer %0\n"
96 "std %0, 296(%2)\n"
97 : "=&r" (tmp1), "=&r" (tmp2)
Michael Matz2ec5e3a2006-03-07 21:55:48 -080098 : "b" (newregs)
99 : "memory");
Haren Myneni8385a6a2006-01-13 19:15:36 -0800100 }
101}
102#else
103/*
104 * Provide a dummy definition to avoid build failures. Will remain
105 * empty till crash dump support is enabled.
106 */
107static inline void crash_setup_regs(struct pt_regs *newregs,
108 struct pt_regs *oldregs) { }
109#endif /* !__powerpc64 __ */
110
Michael Ellermane1df8702005-11-03 15:35:45 +1100111extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
112 master to copy new code to 0 */
Michael Ellermancc532912005-12-04 18:39:43 +1100113extern int crashing_cpu;
114extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
David Wilderc0ce7d02006-06-23 15:29:34 -0700115extern cpumask_t cpus_in_sr;
116static inline int kexec_sr_activated(int cpu)
117{
118 return cpu_isset(cpu,cpus_in_sr);
119}
Michael Ellermane1df8702005-11-03 15:35:45 +1100120
Michael Ellerman3d1229d2005-11-14 23:35:00 +1100121struct kimage;
Michael Ellermancc532912005-12-04 18:39:43 +1100122struct pt_regs;
Michael Ellerman3d1229d2005-11-14 23:35:00 +1100123extern void default_machine_kexec(struct kimage *image);
124extern int default_machine_kexec_prepare(struct kimage *image);
Michael Ellermancc532912005-12-04 18:39:43 +1100125extern void default_machine_crash_shutdown(struct pt_regs *regs);
Michael Neuling496b0102008-01-18 15:50:30 +1100126typedef void (*crash_shutdown_t)(void);
127extern int crash_shutdown_register(crash_shutdown_t handler);
128extern int crash_shutdown_unregister(crash_shutdown_t handler);
Michael Ellermancc532912005-12-04 18:39:43 +1100129
Albert Herranz39931e42006-02-01 03:05:57 -0800130extern void machine_kexec_simple(struct kimage *image);
David Wilderc0ce7d02006-06-23 15:29:34 -0700131extern void crash_kexec_secondary(struct pt_regs *regs);
Michael Ellerman2babf5c2006-05-17 18:00:46 +1000132extern int overlaps_crashkernel(unsigned long start, unsigned long size);
Michael Ellerman35dd5432006-05-18 11:16:11 +1000133extern void reserve_crashkernel(void);
Albert Herranz39931e42006-02-01 03:05:57 -0800134
Michael Ellerman2babf5c2006-05-17 18:00:46 +1000135#else /* !CONFIG_KEXEC */
David Wilderc0ce7d02006-06-23 15:29:34 -0700136static inline int kexec_sr_activated(int cpu) { return 0; }
137static inline void crash_kexec_secondary(struct pt_regs *regs) { }
Michael Ellerman2babf5c2006-05-17 18:00:46 +1000138
139static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
140{
141 return 0;
142}
143
Michael Ellerman35dd5432006-05-18 11:16:11 +1000144static inline void reserve_crashkernel(void) { ; }
145
Haren Myneni8385a6a2006-01-13 19:15:36 -0800146#endif /* CONFIG_KEXEC */
Michael Ellerman2babf5c2006-05-17 18:00:46 +1000147#endif /* ! __ASSEMBLY__ */
Arnd Bergmann88ced032005-12-16 22:43:46 +0100148#endif /* __KERNEL__ */
Michael Ellermane1df8702005-11-03 15:35:45 +1100149#endif /* _ASM_POWERPC_KEXEC_H */