1#ifndef _ASM_POWERPC_KEXEC_H
2#define _ASM_POWERPC_KEXEC_H
3#ifdef __KERNEL__
4
5#if defined(CONFIG_FSL_BOOKE) || defined(CONFIG_44x)
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 <asm/reg.h>
53
54typedef void (*crash_shutdown_t)(void);
55
56#ifdef CONFIG_KEXEC
57
58/*
59 * This function is responsible for capturing register states if coming
60 * via panic or invoking dump using sysrq-trigger.
61 */
62static inline void crash_setup_regs(struct pt_regs *newregs,
63					struct pt_regs *oldregs)
64{
65	if (oldregs)
66		memcpy(newregs, oldregs, sizeof(*newregs));
67	else
68		ppc_save_regs(newregs);
69}
70
71extern void kexec_smp_wait(void);	/* get and clear naca physid, wait for
72					  master to copy new code to 0 */
73extern int crashing_cpu;
74extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
75
76struct kimage;
77struct pt_regs;
78extern void default_machine_kexec(struct kimage *image);
79extern int default_machine_kexec_prepare(struct kimage *image);
80extern void default_machine_crash_shutdown(struct pt_regs *regs);
81extern int crash_shutdown_register(crash_shutdown_t handler);
82extern int crash_shutdown_unregister(crash_shutdown_t handler);
83
84extern void machine_kexec_simple(struct kimage *image);
85extern void crash_kexec_secondary(struct pt_regs *regs);
86extern int overlaps_crashkernel(unsigned long start, unsigned long size);
87extern void reserve_crashkernel(void);
88extern void machine_kexec_mask_interrupts(void);
89
90#else /* !CONFIG_KEXEC */
91static inline void crash_kexec_secondary(struct pt_regs *regs) { }
92
93static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
94{
95	return 0;
96}
97
98static inline void reserve_crashkernel(void) { ; }
99
100static inline int crash_shutdown_register(crash_shutdown_t handler)
101{
102	return 0;
103}
104
105static inline int crash_shutdown_unregister(crash_shutdown_t handler)
106{
107	return 0;
108}
109
110#endif /* CONFIG_KEXEC */
111#endif /* ! __ASSEMBLY__ */
112#endif /* __KERNEL__ */
113#endif /* _ASM_POWERPC_KEXEC_H */
114