*/
#include <linux/module.h>
-#include <linux/smp_lock.h>
#include <linux/file.h>
#include <linux/utsname.h>
#include <linux/version.h>
#include "power.h"
-extern char resume_file[];
-
#define SWSUSP_SIG "S1SUSPEND"
-static struct swsusp_header {
- char reserved[PAGE_SIZE - 20 - sizeof(sector_t)];
+struct swsusp_header {
+ char reserved[PAGE_SIZE - 20 - sizeof(sector_t) - sizeof(int)];
sector_t image;
+ unsigned int flags; /* Flags to pass to the "boot" kernel */
char orig_sig[10];
char sig[10];
-} __attribute__((packed, aligned(PAGE_SIZE))) swsusp_header;
+} __attribute__((packed));
+
+static struct swsusp_header *swsusp_header;
/*
* General things
bio->bi_end_io = end_swap_bio_read;
if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
- printk("swsusp: ERROR: adding page to bio at %ld\n", page_off);
+ printk(KERN_ERR "PM: Adding page to bio failed at %ld\n",
+ page_off);
bio_put(bio);
return -EFAULT;
}
* Saving part
*/
-static int mark_swapfiles(sector_t start)
+static int mark_swapfiles(sector_t start, unsigned int flags)
{
int error;
- bio_read_page(swsusp_resume_block, &swsusp_header, NULL);
- if (!memcmp("SWAP-SPACE",swsusp_header.sig, 10) ||
- !memcmp("SWAPSPACE2",swsusp_header.sig, 10)) {
- memcpy(swsusp_header.orig_sig,swsusp_header.sig, 10);
- memcpy(swsusp_header.sig,SWSUSP_SIG, 10);
- swsusp_header.image = start;
+ bio_read_page(swsusp_resume_block, swsusp_header, NULL);
+ if (!memcmp("SWAP-SPACE",swsusp_header->sig, 10) ||
+ !memcmp("SWAPSPACE2",swsusp_header->sig, 10)) {
+ memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10);
+ memcpy(swsusp_header->sig,SWSUSP_SIG, 10);
+ swsusp_header->image = start;
+ swsusp_header->flags = flags;
error = bio_write_page(swsusp_resume_block,
- &swsusp_header, NULL);
+ swsusp_header, NULL);
} else {
- printk(KERN_ERR "swsusp: Swap header not found!\n");
+ printk(KERN_ERR "PM: Swap header not found!\n");
error = -ENODEV;
}
return error;
struct swap_map_handle {
struct swap_map_page *cur;
sector_t cur_swap;
- struct bitmap_page *bitmap;
unsigned int k;
};
if (handle->cur)
free_page((unsigned long)handle->cur);
handle->cur = NULL;
- if (handle->bitmap)
- free_bitmap(handle->bitmap);
- handle->bitmap = NULL;
}
static int get_swap_writer(struct swap_map_handle *handle)
handle->cur = (struct swap_map_page *)get_zeroed_page(GFP_KERNEL);
if (!handle->cur)
return -ENOMEM;
- handle->bitmap = alloc_bitmap(count_swap_pages(root_swap, 0));
- if (!handle->bitmap) {
- release_swap_writer(handle);
- return -ENOMEM;
- }
- handle->cur_swap = alloc_swapdev_block(root_swap, handle->bitmap);
+ handle->cur_swap = alloc_swapdev_block(root_swap);
if (!handle->cur_swap) {
release_swap_writer(handle);
return -ENOSPC;
if (!handle->cur)
return -EINVAL;
- offset = alloc_swapdev_block(root_swap, handle->bitmap);
+ offset = alloc_swapdev_block(root_swap);
error = write_page(buf, offset, bio_chain);
if (error)
return error;
error = wait_on_bio_chain(bio_chain);
if (error)
goto out;
- offset = alloc_swapdev_block(root_swap, handle->bitmap);
+ offset = alloc_swapdev_block(root_swap);
if (!offset)
return -ENOSPC;
handle->cur->next_swap = offset;
struct timeval start;
struct timeval stop;
- printk("Saving image data pages (%u pages) ... ", nr_to_write);
+ printk(KERN_INFO "PM: Saving image data pages (%u pages) ... ",
+ nr_to_write);
m = nr_to_write / 100;
if (!m)
m = 1;
{
unsigned int free_swap = count_swap_pages(root_swap, 1);
- pr_debug("swsusp: free swap pages: %u\n", free_swap);
+ pr_debug("PM: Free swap pages: %u\n", free_swap);
return free_swap > nr_pages + PAGES_FOR_IO;
}
/**
* swsusp_write - Write entire image and metadata.
+ * @flags: flags to pass to the "boot" kernel in the image header
*
* It is important _NOT_ to umount filesystems at this point. We want
* them synced (in case something goes wrong) but we DO not want to mark
* correctly, we'll mark system clean, anyway.)
*/
-int swsusp_write(void)
+int swsusp_write(unsigned int flags)
{
struct swap_map_handle handle;
struct snapshot_handle snapshot;
error = swsusp_swap_check();
if (error) {
- printk(KERN_ERR "swsusp: Cannot find swap device, try "
+ printk(KERN_ERR "PM: Cannot find swap device, try "
"swapon -a.\n");
return error;
}
}
header = (struct swsusp_info *)data_of(snapshot);
if (!enough_swap(header->pages)) {
- printk(KERN_ERR "swsusp: Not enough free swap\n");
+ printk(KERN_ERR "PM: Not enough free swap\n");
error = -ENOSPC;
goto out;
}
if (!error) {
flush_swap_writer(&handle);
- printk("S");
- error = mark_swapfiles(start);
+ printk(KERN_INFO "PM: S");
+ error = mark_swapfiles(start, flags);
printk("|\n");
}
}
if (error)
- free_all_swap_pages(root_swap, handle.bitmap);
+ free_all_swap_pages(root_swap);
+
release_swap_writer(&handle);
out:
swsusp_close();
int err2;
unsigned nr_pages;
- printk("Loading image data pages (%u pages) ... ", nr_to_read);
+ printk(KERN_INFO "PM: Loading image data pages (%u pages) ... ",
+ nr_to_read);
m = nr_to_read / 100;
if (!m)
m = 1;
return error;
}
-int swsusp_read(void)
+/**
+ * swsusp_read - read the hibernation image.
+ * @flags_p: flags passed by the "frozen" kernel in the image header should
+ * be written into this memeory location
+ */
+
+int swsusp_read(unsigned int *flags_p)
{
int error;
struct swap_map_handle handle;
struct snapshot_handle snapshot;
struct swsusp_info *header;
+ *flags_p = swsusp_header->flags;
if (IS_ERR(resume_bdev)) {
- pr_debug("swsusp: block device not initialised\n");
+ pr_debug("PM: Image device not initialised\n");
return PTR_ERR(resume_bdev);
}
if (error < PAGE_SIZE)
return error < 0 ? error : -EFAULT;
header = (struct swsusp_info *)data_of(snapshot);
- error = get_swap_reader(&handle, swsusp_header.image);
+ error = get_swap_reader(&handle, swsusp_header->image);
if (!error)
error = swap_read_page(&handle, header, NULL);
if (!error)
blkdev_put(resume_bdev);
if (!error)
- pr_debug("swsusp: Reading resume file was successful\n");
+ pr_debug("PM: Image successfully loaded\n");
else
- pr_debug("swsusp: Error %d resuming\n", error);
+ pr_debug("PM: Error %d resuming\n", error);
return error;
}
resume_bdev = open_by_devnum(swsusp_resume_device, FMODE_READ);
if (!IS_ERR(resume_bdev)) {
set_blocksize(resume_bdev, PAGE_SIZE);
- memset(&swsusp_header, 0, sizeof(swsusp_header));
+ memset(swsusp_header, 0, PAGE_SIZE);
error = bio_read_page(swsusp_resume_block,
- &swsusp_header, NULL);
+ swsusp_header, NULL);
if (error)
return error;
- if (!memcmp(SWSUSP_SIG, swsusp_header.sig, 10)) {
- memcpy(swsusp_header.sig, swsusp_header.orig_sig, 10);
+ if (!memcmp(SWSUSP_SIG, swsusp_header->sig, 10)) {
+ memcpy(swsusp_header->sig, swsusp_header->orig_sig, 10);
/* Reset swap signature now */
error = bio_write_page(swsusp_resume_block,
- &swsusp_header, NULL);
+ swsusp_header, NULL);
} else {
return -EINVAL;
}
if (error)
blkdev_put(resume_bdev);
else
- pr_debug("swsusp: Signature found, resuming\n");
+ pr_debug("PM: Signature found, resuming\n");
} else {
error = PTR_ERR(resume_bdev);
}
if (error)
- pr_debug("swsusp: Error %d check for resume file\n", error);
+ pr_debug("PM: Error %d checking image file\n", error);
return error;
}
void swsusp_close(void)
{
if (IS_ERR(resume_bdev)) {
- pr_debug("swsusp: block device not initialised\n");
+ pr_debug("PM: Image device not initialised\n");
return;
}
blkdev_put(resume_bdev);
}
+
+static int swsusp_header_init(void)
+{
+ swsusp_header = (struct swsusp_header*) __get_free_page(GFP_KERNEL);
+ if (!swsusp_header)
+ panic("Could not allocate memory for swsusp_header\n");
+ return 0;
+}
+
+core_initcall(swsusp_header_init);
projects / linux-2.6-omap-h63xx.git / blobdiff