1/*
 2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 3 *
 4 *   This program is free software; you can redistribute it and/or
 5 *   modify it under the terms of the GNU General Public License
 6 *   as published by the Free Software Foundation, version 2.
 7 *
 8 *   This program is distributed in the hope that it will be useful, but
 9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 *
14 * based on kexec.h from other architectures in linux-2.6.18
15 */
16
17#ifndef _ASM_TILE_KEXEC_H
18#define _ASM_TILE_KEXEC_H
19
20#include <asm/page.h>
21
22#ifndef __tilegx__
23/* Maximum physical address we can use pages from. */
24#define KEXEC_SOURCE_MEMORY_LIMIT TASK_SIZE
25/* Maximum address we can reach in physical address mode. */
26#define KEXEC_DESTINATION_MEMORY_LIMIT TASK_SIZE
27/* Maximum address we can use for the control code buffer. */
28#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
29#else
30/* We need to limit the memory below PGDIR_SIZE since
31 * we only setup page table for [0, PGDIR_SIZE) before final kexec.
32 */
33/* Maximum physical address we can use pages from. */
34#define KEXEC_SOURCE_MEMORY_LIMIT PGDIR_SIZE
35/* Maximum address we can reach in physical address mode. */
36#define KEXEC_DESTINATION_MEMORY_LIMIT PGDIR_SIZE
37/* Maximum address we can use for the control code buffer. */
38#define KEXEC_CONTROL_MEMORY_LIMIT PGDIR_SIZE
39#endif
40
41#define KEXEC_CONTROL_PAGE_SIZE	PAGE_SIZE
42
43/*
44 * We don't bother to provide a unique identifier, since we can only
45 * reboot with a single type of kernel image anyway.
46 */
47#define KEXEC_ARCH KEXEC_ARCH_DEFAULT
48
49/* Use the tile override for the page allocator. */
50struct page *kimage_alloc_pages_arch(gfp_t gfp_mask, unsigned int order);
51#define kimage_alloc_pages_arch kimage_alloc_pages_arch
52
53#define MAX_NOTE_BYTES 1024
54
55/* Defined in arch/tile/kernel/relocate_kernel.S */
56extern const unsigned char relocate_new_kernel[];
57extern const unsigned long relocate_new_kernel_size;
58extern void relocate_new_kernel_end(void);
59
60/* Provide a dummy definition to avoid build failures. */
61static inline void crash_setup_regs(struct pt_regs *n, struct pt_regs *o)
62{
63}
64
65#endif /* _ASM_TILE_KEXEC_H */