blob: 6a2af2f6853b368ad8765de253814e1a1f0f090e [file] [log] [blame]
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 Ellermancc532912005-12-04 18:39:43 +110034#ifdef CONFIG_KEXEC
35
Albert Herranz39931e42006-02-01 03:05:57 -080036#ifndef __ASSEMBLY__
Haren Myneni8385a6a2006-01-13 19:15:36 -080037#ifdef __powerpc64__
38/*
39 * This function is responsible for capturing register states if coming
40 * via panic or invoking dump using sysrq-trigger.
41 */
42static inline void crash_setup_regs(struct pt_regs *newregs,
43 struct pt_regs *oldregs)
44{
45 if (oldregs)
46 memcpy(newregs, oldregs, sizeof(*newregs));
47 else {
48 /* FIXME Merge this with xmon_save_regs ?? */
49 unsigned long tmp1, tmp2;
50 __asm__ __volatile__ (
51 "std 0,0(%2)\n"
52 "std 1,8(%2)\n"
53 "std 2,16(%2)\n"
54 "std 3,24(%2)\n"
55 "std 4,32(%2)\n"
56 "std 5,40(%2)\n"
57 "std 6,48(%2)\n"
58 "std 7,56(%2)\n"
59 "std 8,64(%2)\n"
60 "std 9,72(%2)\n"
61 "std 10,80(%2)\n"
62 "std 11,88(%2)\n"
63 "std 12,96(%2)\n"
64 "std 13,104(%2)\n"
65 "std 14,112(%2)\n"
66 "std 15,120(%2)\n"
67 "std 16,128(%2)\n"
68 "std 17,136(%2)\n"
69 "std 18,144(%2)\n"
70 "std 19,152(%2)\n"
71 "std 20,160(%2)\n"
72 "std 21,168(%2)\n"
73 "std 22,176(%2)\n"
74 "std 23,184(%2)\n"
75 "std 24,192(%2)\n"
76 "std 25,200(%2)\n"
77 "std 26,208(%2)\n"
78 "std 27,216(%2)\n"
79 "std 28,224(%2)\n"
80 "std 29,232(%2)\n"
81 "std 30,240(%2)\n"
82 "std 31,248(%2)\n"
83 "mfmsr %0\n"
84 "std %0, 264(%2)\n"
85 "mfctr %0\n"
86 "std %0, 280(%2)\n"
87 "mflr %0\n"
88 "std %0, 288(%2)\n"
89 "bl 1f\n"
90 "1: mflr %1\n"
91 "std %1, 256(%2)\n"
92 "mtlr %0\n"
93 "mfxer %0\n"
94 "std %0, 296(%2)\n"
95 : "=&r" (tmp1), "=&r" (tmp2)
Michael Matz2ec5e3a2006-03-07 21:55:48 -080096 : "b" (newregs)
97 : "memory");
Haren Myneni8385a6a2006-01-13 19:15:36 -080098 }
99}
100#else
101/*
102 * Provide a dummy definition to avoid build failures. Will remain
103 * empty till crash dump support is enabled.
104 */
105static inline void crash_setup_regs(struct pt_regs *newregs,
106 struct pt_regs *oldregs) { }
107#endif /* !__powerpc64 __ */
108
Michael Ellermane1df8702005-11-03 15:35:45 +1100109#define MAX_NOTE_BYTES 1024
Michael Ellermane1df8702005-11-03 15:35:45 +1100110
111#ifdef __powerpc64__
112extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
113 master to copy new code to 0 */
Michael Ellerman593e5372005-11-12 00:06:06 +1100114extern void __init kexec_setup(void);
Michael Ellermancc532912005-12-04 18:39:43 +1100115extern int crashing_cpu;
116extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
117#endif /* __powerpc64 __ */
Michael Ellermane1df8702005-11-03 15:35:45 +1100118
Michael Ellerman3d1229d2005-11-14 23:35:00 +1100119struct kimage;
Michael Ellermancc532912005-12-04 18:39:43 +1100120struct pt_regs;
Michael Ellerman3d1229d2005-11-14 23:35:00 +1100121extern void default_machine_kexec(struct kimage *image);
122extern int default_machine_kexec_prepare(struct kimage *image);
Michael Ellermancc532912005-12-04 18:39:43 +1100123extern void default_machine_crash_shutdown(struct pt_regs *regs);
124
Albert Herranz39931e42006-02-01 03:05:57 -0800125extern void machine_kexec_simple(struct kimage *image);
126
Michael Ellermane1df8702005-11-03 15:35:45 +1100127#endif /* ! __ASSEMBLY__ */
Haren Myneni8385a6a2006-01-13 19:15:36 -0800128#endif /* CONFIG_KEXEC */
Arnd Bergmann88ced032005-12-16 22:43:46 +0100129#endif /* __KERNEL__ */
Michael Ellermane1df8702005-11-03 15:35:45 +1100130#endif /* _ASM_POWERPC_KEXEC_H */