diff options
Diffstat (limited to 'kernel/crash_dump.c')
| -rw-r--r-- | kernel/crash_dump.c | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c deleted file mode 100644 index 334c37f5218a..000000000000 --- a/kernel/crash_dump.c +++ /dev/null | |||
| @@ -1,61 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * kernel/crash_dump.c - Memory preserving reboot related code. | ||
| 3 | * | ||
| 4 | * Created by: Hariprasad Nellitheertha (hari@in.ibm.com) | ||
| 5 | * Copyright (C) IBM Corporation, 2004. All rights reserved | ||
| 6 | */ | ||
| 7 | |||
| 8 | #include <linux/smp_lock.h> | ||
| 9 | #include <linux/errno.h> | ||
| 10 | #include <linux/proc_fs.h> | ||
| 11 | #include <linux/bootmem.h> | ||
| 12 | #include <linux/highmem.h> | ||
| 13 | #include <linux/crash_dump.h> | ||
| 14 | |||
| 15 | #include <asm/io.h> | ||
| 16 | #include <asm/uaccess.h> | ||
| 17 | |||
| 18 | /* Stores the physical address of elf header of crash image. */ | ||
| 19 | unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX; | ||
| 20 | |||
| 21 | /** | ||
| 22 | * copy_oldmem_page - copy one page from "oldmem" | ||
| 23 | * @pfn: page frame number to be copied | ||
| 24 | * @buf: target memory address for the copy; this can be in kernel address | ||
| 25 | * space or user address space (see @userbuf) | ||
| 26 | * @csize: number of bytes to copy | ||
| 27 | * @offset: offset in bytes into the page (based on pfn) to begin the copy | ||
| 28 | * @userbuf: if set, @buf is in user address space, use copy_to_user(), | ||
| 29 | * otherwise @buf is in kernel address space, use memcpy(). | ||
| 30 | * | ||
| 31 | * Copy a page from "oldmem". For this page, there is no pte mapped | ||
| 32 | * in the current kernel. We stitch up a pte, similar to kmap_atomic. | ||
| 33 | */ | ||
| 34 | ssize_t copy_oldmem_page(unsigned long pfn, char *buf, | ||
| 35 | size_t csize, unsigned long offset, int userbuf) | ||
| 36 | { | ||
| 37 | void *page, *vaddr; | ||
| 38 | |||
| 39 | if (!csize) | ||
| 40 | return 0; | ||
| 41 | |||
| 42 | page = kmalloc(PAGE_SIZE, GFP_KERNEL); | ||
| 43 | if (!page) | ||
| 44 | return -ENOMEM; | ||
| 45 | |||
| 46 | vaddr = kmap_atomic_pfn(pfn, KM_PTE0); | ||
| 47 | copy_page(page, vaddr); | ||
| 48 | kunmap_atomic(vaddr, KM_PTE0); | ||
| 49 | |||
| 50 | if (userbuf) { | ||
| 51 | if (copy_to_user(buf, (page + offset), csize)) { | ||
| 52 | kfree(page); | ||
| 53 | return -EFAULT; | ||
| 54 | } | ||
| 55 | } else { | ||
| 56 | memcpy(buf, (page + offset), csize); | ||
| 57 | } | ||
| 58 | |||
| 59 | kfree(page); | ||
| 60 | return csize; | ||
| 61 | } | ||
