diff options
| author | Manish Ahuja <ahuja@austin.ibm.com> | 2008-03-21 23:37:08 (GMT) |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-25 21:44:06 (GMT) |
| commit | 6ac26c8a7eb149dbd669cc6cd9b77ffc9cd0d2fb (patch) | |
| tree | 4eb613ed5f8eb7accb042e30c89d9d25097d557f /include/asm-powerpc | |
| parent | d28a79326a4028dbb1755b8efe6daa915d8bfeea (diff) | |
| download | linux-6ac26c8a7eb149dbd669cc6cd9b77ffc9cd0d2fb.tar.xz | |
[POWERPC] pseries: phyp dump: Reserve and release memory
Initial patch for reserving memory in early boot, and freeing it
later. If the previous boot had ended with a crash, the reserved
memory would contain a copy of the crashed kernel data.
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com>
Signed-off-by: Linas Vepstas <linasvepstas@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/phyp_dump.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/asm-powerpc/phyp_dump.h b/include/asm-powerpc/phyp_dump.h new file mode 100644 index 0000000..e2d988d --- /dev/null +++ b/include/asm-powerpc/phyp_dump.h @@ -0,0 +1,41 @@ +/* + * Hypervisor-assisted dump + * + * Linas Vepstas, Manish Ahuja 2008 + * Copyright 2008 IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _PPC64_PHYP_DUMP_H +#define _PPC64_PHYP_DUMP_H + +#ifdef CONFIG_PHYP_DUMP + +/* The RMR region will be saved for later dumping + * whenever the kernel crashes. Set this to 256MB. */ +#define PHYP_DUMP_RMR_START 0x0 +#define PHYP_DUMP_RMR_END (1UL<<28) + +struct phyp_dump { + /* Memory that is reserved during very early boot. */ + unsigned long init_reserve_start; + unsigned long init_reserve_size; + /* Check status during boot if dump supported, active & present*/ + unsigned long phyp_dump_configured; + unsigned long phyp_dump_is_active; + /* store cpu & hpte size */ + unsigned long cpu_state_size; + unsigned long hpte_region_size; +}; + +extern struct phyp_dump *phyp_dump_info; + +int early_init_dt_scan_phyp_dump(unsigned long node, + const char *uname, int depth, void *data); + +#endif /* CONFIG_PHYP_DUMP */ +#endif /* _PPC64_PHYP_DUMP_H */ |