2 * c 2001 PPC 64 Team, IBM Corp
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; either version
7 * 2 of the License, or (at your option) any later version.
9 * /proc/powerpc/rtas/firmware_flash interface
11 * This file implements a firmware_flash interface to pump a firmware
12 * image into the kernel. At reboot time rtas_restart() will see the
13 * firmware image and flash it as it reboots (see rtas.c).
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/proc_fs.h>
20 #include <linux/reboot.h>
21 #include <asm/delay.h>
22 #include <asm/uaccess.h>
25 #define MODULE_VERS "1.0"
26 #define MODULE_NAME "rtas_flash"
28 #define FIRMWARE_FLASH_NAME "firmware_flash"
29 #define FIRMWARE_UPDATE_NAME "firmware_update"
30 #define MANAGE_FLASH_NAME "manage_flash"
31 #define VALIDATE_FLASH_NAME "validate_flash"
33 /* General RTAS Status Codes */
34 #define RTAS_RC_SUCCESS 0
35 #define RTAS_RC_HW_ERR -1
36 #define RTAS_RC_BUSY -2
38 /* Flash image status values */
39 #define FLASH_AUTH -9002 /* RTAS Not Service Authority Partition */
40 #define FLASH_NO_OP -1099 /* No operation initiated by user */
41 #define FLASH_IMG_SHORT -1005 /* Flash image shorter than expected */
42 #define FLASH_IMG_BAD_LEN -1004 /* Bad length value in flash list block */
43 #define FLASH_IMG_NULL_DATA -1003 /* Bad data value in flash list block */
44 #define FLASH_IMG_READY 0 /* Firmware img ready for flash on reboot */
46 /* Manage image status values */
47 #define MANAGE_AUTH -9002 /* RTAS Not Service Authority Partition */
48 #define MANAGE_ACTIVE_ERR -9001 /* RTAS Cannot Overwrite Active Img */
49 #define MANAGE_NO_OP -1099 /* No operation initiated by user */
50 #define MANAGE_PARAM_ERR -3 /* RTAS Parameter Error */
51 #define MANAGE_HW_ERR -1 /* RTAS Hardware Error */
53 /* Validate image status values */
54 #define VALIDATE_AUTH -9002 /* RTAS Not Service Authority Partition */
55 #define VALIDATE_NO_OP -1099 /* No operation initiated by the user */
56 #define VALIDATE_INCOMPLETE -1002 /* User copied < VALIDATE_BUF_SIZE */
57 #define VALIDATE_READY -1001 /* Firmware image ready for validation */
58 #define VALIDATE_PARAM_ERR -3 /* RTAS Parameter Error */
59 #define VALIDATE_HW_ERR -1 /* RTAS Hardware Error */
60 #define VALIDATE_TMP_UPDATE 0 /* Validate Return Status */
61 #define VALIDATE_FLASH_AUTH 1 /* Validate Return Status */
62 #define VALIDATE_INVALID_IMG 2 /* Validate Return Status */
63 #define VALIDATE_CUR_UNKNOWN 3 /* Validate Return Status */
64 #define VALIDATE_TMP_COMMIT_DL 4 /* Validate Return Status */
65 #define VALIDATE_TMP_COMMIT 5 /* Validate Return Status */
66 #define VALIDATE_TMP_UPDATE_DL 6 /* Validate Return Status */
68 /* ibm,manage-flash-image operation tokens */
69 #define RTAS_REJECT_TMP_IMG 0
70 #define RTAS_COMMIT_TMP_IMG 1
73 #define VALIDATE_BUF_SIZE 4096
74 #define RTAS_MSG_MAXLEN 64
76 /* Quirk - RTAS requires 4k list length and block size */
77 #define RTAS_BLKLIST_LENGTH 4096
78 #define RTAS_BLK_SIZE 4096
85 /* This struct is very similar but not identical to
86 * that needed by the rtas flash update.
87 * All we need to do for rtas is rewrite num_blocks
88 * into a version/length and translate the pointers
91 #define FLASH_BLOCKS_PER_NODE ((RTAS_BLKLIST_LENGTH - 16) / sizeof(struct flash_block))
92 struct flash_block_list
{
93 unsigned long num_blocks
;
94 struct flash_block_list
*next
;
95 struct flash_block blocks
[FLASH_BLOCKS_PER_NODE
];
98 static struct flash_block_list
*rtas_firmware_flash_list
;
100 /* Use slab cache to guarantee 4k alignment */
101 static struct kmem_cache
*flash_block_cache
= NULL
;
103 #define FLASH_BLOCK_LIST_VERSION (1UL)
105 /* Local copy of the flash block list.
106 * We only allow one open of the flash proc file and create this
107 * list as we go. The rtas_firmware_flash_list varable will be
108 * set once the data is fully read.
110 * For convenience as we build the list we use virtual addrs,
111 * we do not fill in the version number, and the length field
112 * is treated as the number of entries currently in the block
113 * (i.e. not a byte count). This is all fixed when calling
117 /* Status int must be first member of struct */
118 struct rtas_update_flash_t
120 int status
; /* Flash update status */
121 struct flash_block_list
*flist
; /* Local copy of flash block list */
124 /* Status int must be first member of struct */
125 struct rtas_manage_flash_t
127 int status
; /* Returned status */
128 unsigned int op
; /* Reject or commit image */
131 /* Status int must be first member of struct */
132 struct rtas_validate_flash_t
134 int status
; /* Returned status */
135 char buf
[VALIDATE_BUF_SIZE
]; /* Candidate image buffer */
136 unsigned int buf_size
; /* Size of image buf */
137 unsigned int update_results
; /* Update results token */
140 static DEFINE_SPINLOCK(flash_file_open_lock
);
141 static struct proc_dir_entry
*firmware_flash_pde
;
142 static struct proc_dir_entry
*firmware_update_pde
;
143 static struct proc_dir_entry
*validate_pde
;
144 static struct proc_dir_entry
*manage_pde
;
146 /* Do simple sanity checks on the flash image. */
147 static int flash_list_valid(struct flash_block_list
*flist
)
149 struct flash_block_list
*f
;
151 unsigned long block_size
, image_size
;
153 /* Paranoid self test here. We also collect the image size. */
155 for (f
= flist
; f
; f
= f
->next
) {
156 for (i
= 0; i
< f
->num_blocks
; i
++) {
157 if (f
->blocks
[i
].data
== NULL
) {
158 return FLASH_IMG_NULL_DATA
;
160 block_size
= f
->blocks
[i
].length
;
161 if (block_size
<= 0 || block_size
> RTAS_BLK_SIZE
) {
162 return FLASH_IMG_BAD_LEN
;
164 image_size
+= block_size
;
168 if (image_size
< (256 << 10)) {
173 printk(KERN_INFO
"FLASH: flash image with %ld bytes stored for hardware flash on reboot\n", image_size
);
175 return FLASH_IMG_READY
;
178 static void free_flash_list(struct flash_block_list
*f
)
180 struct flash_block_list
*next
;
184 for (i
= 0; i
< f
->num_blocks
; i
++)
185 kmem_cache_free(flash_block_cache
, f
->blocks
[i
].data
);
187 kmem_cache_free(flash_block_cache
, f
);
192 static int rtas_flash_release(struct inode
*inode
, struct file
*file
)
194 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
195 struct rtas_update_flash_t
*uf
;
197 uf
= (struct rtas_update_flash_t
*) dp
->data
;
199 /* File was opened in write mode for a new flash attempt */
200 /* Clear saved list */
201 if (rtas_firmware_flash_list
) {
202 free_flash_list(rtas_firmware_flash_list
);
203 rtas_firmware_flash_list
= NULL
;
206 if (uf
->status
!= FLASH_AUTH
)
207 uf
->status
= flash_list_valid(uf
->flist
);
209 if (uf
->status
== FLASH_IMG_READY
)
210 rtas_firmware_flash_list
= uf
->flist
;
212 free_flash_list(uf
->flist
);
217 atomic_dec(&dp
->count
);
221 static void get_flash_status_msg(int status
, char *buf
)
227 msg
= "error: this partition does not have service authority\n";
230 msg
= "info: no firmware image for flash\n";
232 case FLASH_IMG_SHORT
:
233 msg
= "error: flash image short\n";
235 case FLASH_IMG_BAD_LEN
:
236 msg
= "error: internal error bad length\n";
238 case FLASH_IMG_NULL_DATA
:
239 msg
= "error: internal error null data\n";
241 case FLASH_IMG_READY
:
242 msg
= "ready: firmware image ready for flash on reboot\n";
245 sprintf(buf
, "error: unexpected status value %d\n", status
);
252 /* Reading the proc file will show status (not the firmware contents) */
253 static ssize_t
rtas_flash_read(struct file
*file
, char __user
*buf
,
254 size_t count
, loff_t
*ppos
)
256 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
257 struct rtas_update_flash_t
*uf
;
258 char msg
[RTAS_MSG_MAXLEN
];
262 if (!strcmp(dp
->name
, FIRMWARE_FLASH_NAME
)) {
263 get_flash_status_msg(uf
->status
, msg
);
264 } else { /* FIRMWARE_UPDATE_NAME */
265 sprintf(msg
, "%d\n", uf
->status
);
268 return simple_read_from_buffer(buf
, count
, ppos
, msg
, strlen(msg
));
271 /* constructor for flash_block_cache */
272 void rtas_block_ctor(void *ptr
)
274 memset(ptr
, 0, RTAS_BLK_SIZE
);
277 /* We could be much more efficient here. But to keep this function
278 * simple we allocate a page to the block list no matter how small the
279 * count is. If the system is low on memory it will be just as well
282 static ssize_t
rtas_flash_write(struct file
*file
, const char __user
*buffer
,
283 size_t count
, loff_t
*off
)
285 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
286 struct rtas_update_flash_t
*uf
;
289 struct flash_block_list
*fl
;
291 uf
= (struct rtas_update_flash_t
*) dp
->data
;
293 if (uf
->status
== FLASH_AUTH
|| count
== 0)
294 return count
; /* discard data */
296 /* In the case that the image is not ready for flashing, the memory
297 * allocated for the block list will be freed upon the release of the
300 if (uf
->flist
== NULL
) {
301 uf
->flist
= kmem_cache_alloc(flash_block_cache
, GFP_KERNEL
);
308 fl
= fl
->next
; /* seek to last block_list for append */
309 next_free
= fl
->num_blocks
;
310 if (next_free
== FLASH_BLOCKS_PER_NODE
) {
311 /* Need to allocate another block_list */
312 fl
->next
= kmem_cache_alloc(flash_block_cache
, GFP_KERNEL
);
319 if (count
> RTAS_BLK_SIZE
)
320 count
= RTAS_BLK_SIZE
;
321 p
= kmem_cache_alloc(flash_block_cache
, GFP_KERNEL
);
325 if(copy_from_user(p
, buffer
, count
)) {
326 kmem_cache_free(flash_block_cache
, p
);
329 fl
->blocks
[next_free
].data
= p
;
330 fl
->blocks
[next_free
].length
= count
;
336 static int rtas_excl_open(struct inode
*inode
, struct file
*file
)
338 struct proc_dir_entry
*dp
= PDE(inode
);
340 /* Enforce exclusive open with use count of PDE */
341 spin_lock(&flash_file_open_lock
);
342 if (atomic_read(&dp
->count
) > 2) {
343 spin_unlock(&flash_file_open_lock
);
347 atomic_inc(&dp
->count
);
348 spin_unlock(&flash_file_open_lock
);
353 static int rtas_excl_release(struct inode
*inode
, struct file
*file
)
355 struct proc_dir_entry
*dp
= PDE(inode
);
357 atomic_dec(&dp
->count
);
362 static void manage_flash(struct rtas_manage_flash_t
*args_buf
)
367 rc
= rtas_call(rtas_token("ibm,manage-flash-image"), 1,
368 1, NULL
, args_buf
->op
);
369 } while (rtas_busy_delay(rc
));
371 args_buf
->status
= rc
;
374 static ssize_t
manage_flash_read(struct file
*file
, char __user
*buf
,
375 size_t count
, loff_t
*ppos
)
377 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
378 struct rtas_manage_flash_t
*args_buf
;
379 char msg
[RTAS_MSG_MAXLEN
];
383 if (args_buf
== NULL
)
386 msglen
= sprintf(msg
, "%d\n", args_buf
->status
);
388 return simple_read_from_buffer(buf
, count
, ppos
, msg
, msglen
);
391 static ssize_t
manage_flash_write(struct file
*file
, const char __user
*buf
,
392 size_t count
, loff_t
*off
)
394 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
395 struct rtas_manage_flash_t
*args_buf
;
396 const char reject_str
[] = "0";
397 const char commit_str
[] = "1";
401 args_buf
= (struct rtas_manage_flash_t
*) dp
->data
;
402 if ((args_buf
->status
== MANAGE_AUTH
) || (count
== 0))
407 if (count
> 9) count
= 9;
408 if (copy_from_user (stkbuf
, buf
, count
)) {
411 if (strncmp(stkbuf
, reject_str
, strlen(reject_str
)) == 0)
412 op
= RTAS_REJECT_TMP_IMG
;
413 else if (strncmp(stkbuf
, commit_str
, strlen(commit_str
)) == 0)
414 op
= RTAS_COMMIT_TMP_IMG
;
417 if (op
== -1) /* buf is empty, or contains invalid string */
421 manage_flash(args_buf
);
426 static void validate_flash(struct rtas_validate_flash_t
*args_buf
)
428 int token
= rtas_token("ibm,validate-flash-image");
434 spin_lock(&rtas_data_buf_lock
);
435 memcpy(rtas_data_buf
, args_buf
->buf
, VALIDATE_BUF_SIZE
);
436 rc
= rtas_call(token
, 2, 2, &update_results
,
437 (u32
) __pa(rtas_data_buf
), args_buf
->buf_size
);
438 memcpy(args_buf
->buf
, rtas_data_buf
, VALIDATE_BUF_SIZE
);
439 spin_unlock(&rtas_data_buf_lock
);
440 } while (rtas_busy_delay(rc
));
442 args_buf
->status
= rc
;
443 args_buf
->update_results
= update_results
;
446 static int get_validate_flash_msg(struct rtas_validate_flash_t
*args_buf
,
451 if (args_buf
->status
>= VALIDATE_TMP_UPDATE
) {
452 n
= sprintf(msg
, "%d\n", args_buf
->update_results
);
453 if ((args_buf
->update_results
>= VALIDATE_CUR_UNKNOWN
) ||
454 (args_buf
->update_results
== VALIDATE_TMP_UPDATE
))
455 n
+= sprintf(msg
+ n
, "%s\n", args_buf
->buf
);
457 n
= sprintf(msg
, "%d\n", args_buf
->status
);
462 static ssize_t
validate_flash_read(struct file
*file
, char __user
*buf
,
463 size_t count
, loff_t
*ppos
)
465 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
466 struct rtas_validate_flash_t
*args_buf
;
467 char msg
[RTAS_MSG_MAXLEN
];
472 msglen
= get_validate_flash_msg(args_buf
, msg
);
474 return simple_read_from_buffer(buf
, count
, ppos
, msg
, msglen
);
477 static ssize_t
validate_flash_write(struct file
*file
, const char __user
*buf
,
478 size_t count
, loff_t
*off
)
480 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
481 struct rtas_validate_flash_t
*args_buf
;
484 args_buf
= (struct rtas_validate_flash_t
*) dp
->data
;
486 if (dp
->data
== NULL
) {
487 dp
->data
= kmalloc(sizeof(struct rtas_validate_flash_t
),
489 if (dp
->data
== NULL
)
493 /* We are only interested in the first 4K of the
495 if ((*off
>= VALIDATE_BUF_SIZE
) ||
496 (args_buf
->status
== VALIDATE_AUTH
)) {
501 if (*off
+ count
>= VALIDATE_BUF_SIZE
) {
502 count
= VALIDATE_BUF_SIZE
- *off
;
503 args_buf
->status
= VALIDATE_READY
;
505 args_buf
->status
= VALIDATE_INCOMPLETE
;
508 if (!access_ok(VERIFY_READ
, buf
, count
)) {
512 if (copy_from_user(args_buf
->buf
+ *off
, buf
, count
)) {
527 static int validate_flash_release(struct inode
*inode
, struct file
*file
)
529 struct proc_dir_entry
*dp
= PDE(file
->f_path
.dentry
->d_inode
);
530 struct rtas_validate_flash_t
*args_buf
;
532 args_buf
= (struct rtas_validate_flash_t
*) dp
->data
;
534 if (args_buf
->status
== VALIDATE_READY
) {
535 args_buf
->buf_size
= VALIDATE_BUF_SIZE
;
536 validate_flash(args_buf
);
539 /* The matching atomic_inc was in rtas_excl_open() */
540 atomic_dec(&dp
->count
);
545 static void rtas_flash_firmware(int reboot_type
)
547 unsigned long image_size
;
548 struct flash_block_list
*f
, *next
, *flist
;
549 unsigned long rtas_block_list
;
550 int i
, status
, update_token
;
552 if (rtas_firmware_flash_list
== NULL
)
553 return; /* nothing to do */
555 if (reboot_type
!= SYS_RESTART
) {
556 printk(KERN_ALERT
"FLASH: firmware flash requires a reboot\n");
557 printk(KERN_ALERT
"FLASH: the firmware image will NOT be flashed\n");
561 update_token
= rtas_token("ibm,update-flash-64-and-reboot");
562 if (update_token
== RTAS_UNKNOWN_SERVICE
) {
563 printk(KERN_ALERT
"FLASH: ibm,update-flash-64-and-reboot "
564 "is not available -- not a service partition?\n");
565 printk(KERN_ALERT
"FLASH: firmware will not be flashed\n");
570 * Just before starting the firmware flash, cancel the event scan work
571 * to avoid any soft lockup issues.
573 rtas_cancel_event_scan();
576 * NOTE: the "first" block must be under 4GB, so we create
577 * an entry with no data blocks in the reserved buffer in
578 * the kernel data segment.
580 spin_lock(&rtas_data_buf_lock
);
581 flist
= (struct flash_block_list
*)&rtas_data_buf
[0];
582 flist
->num_blocks
= 0;
583 flist
->next
= rtas_firmware_flash_list
;
584 rtas_block_list
= __pa(flist
);
585 if (rtas_block_list
>= 4UL*1024*1024*1024) {
586 printk(KERN_ALERT
"FLASH: kernel bug...flash list header addr above 4GB\n");
587 spin_unlock(&rtas_data_buf_lock
);
591 printk(KERN_ALERT
"FLASH: preparing saved firmware image for flash\n");
592 /* Update the block_list in place. */
593 rtas_firmware_flash_list
= NULL
; /* too hard to backout on error */
595 for (f
= flist
; f
; f
= next
) {
596 /* Translate data addrs to absolute */
597 for (i
= 0; i
< f
->num_blocks
; i
++) {
598 f
->blocks
[i
].data
= (char *)__pa(f
->blocks
[i
].data
);
599 image_size
+= f
->blocks
[i
].length
;
602 /* Don't translate NULL pointer for last entry */
604 f
->next
= (struct flash_block_list
*)__pa(f
->next
);
607 /* make num_blocks into the version/length field */
608 f
->num_blocks
= (FLASH_BLOCK_LIST_VERSION
<< 56) | ((f
->num_blocks
+1)*16);
611 printk(KERN_ALERT
"FLASH: flash image is %ld bytes\n", image_size
);
612 printk(KERN_ALERT
"FLASH: performing flash and reboot\n");
613 rtas_progress("Flashing \n", 0x0);
614 rtas_progress("Please Wait... ", 0x0);
615 printk(KERN_ALERT
"FLASH: this will take several minutes. Do not power off!\n");
616 status
= rtas_call(update_token
, 1, 1, NULL
, rtas_block_list
);
617 switch (status
) { /* should only get "bad" status */
619 printk(KERN_ALERT
"FLASH: success\n");
622 printk(KERN_ALERT
"FLASH: hardware error. Firmware may not be not flashed\n");
625 printk(KERN_ALERT
"FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n");
628 printk(KERN_ALERT
"FLASH: flash failed when partially complete. System may not reboot\n");
631 printk(KERN_ALERT
"FLASH: unknown flash return code %d\n", status
);
634 spin_unlock(&rtas_data_buf_lock
);
637 static void remove_flash_pde(struct proc_dir_entry
*dp
)
641 remove_proc_entry(dp
->name
, dp
->parent
);
645 static int initialize_flash_pde_data(const char *rtas_call_name
,
647 struct proc_dir_entry
*dp
)
652 dp
->data
= kzalloc(buf_size
, GFP_KERNEL
);
653 if (dp
->data
== NULL
) {
654 remove_flash_pde(dp
);
659 * This code assumes that the status int is the first member of the
662 status
= (int *) dp
->data
;
663 token
= rtas_token(rtas_call_name
);
664 if (token
== RTAS_UNKNOWN_SERVICE
)
665 *status
= FLASH_AUTH
;
667 *status
= FLASH_NO_OP
;
672 static struct proc_dir_entry
*create_flash_pde(const char *filename
,
673 const struct file_operations
*fops
)
675 return proc_create(filename
, S_IRUSR
| S_IWUSR
, NULL
, fops
);
678 static const struct file_operations rtas_flash_operations
= {
679 .owner
= THIS_MODULE
,
680 .read
= rtas_flash_read
,
681 .write
= rtas_flash_write
,
682 .open
= rtas_excl_open
,
683 .release
= rtas_flash_release
,
684 .llseek
= default_llseek
,
687 static const struct file_operations manage_flash_operations
= {
688 .owner
= THIS_MODULE
,
689 .read
= manage_flash_read
,
690 .write
= manage_flash_write
,
691 .open
= rtas_excl_open
,
692 .release
= rtas_excl_release
,
693 .llseek
= default_llseek
,
696 static const struct file_operations validate_flash_operations
= {
697 .owner
= THIS_MODULE
,
698 .read
= validate_flash_read
,
699 .write
= validate_flash_write
,
700 .open
= rtas_excl_open
,
701 .release
= validate_flash_release
,
702 .llseek
= default_llseek
,
705 static int __init
rtas_flash_init(void)
709 if (rtas_token("ibm,update-flash-64-and-reboot") ==
710 RTAS_UNKNOWN_SERVICE
) {
711 pr_info("rtas_flash: no firmware flash support\n");
715 firmware_flash_pde
= create_flash_pde("powerpc/rtas/"
717 &rtas_flash_operations
);
718 if (firmware_flash_pde
== NULL
) {
723 rc
= initialize_flash_pde_data("ibm,update-flash-64-and-reboot",
724 sizeof(struct rtas_update_flash_t
),
729 firmware_update_pde
= create_flash_pde("powerpc/rtas/"
730 FIRMWARE_UPDATE_NAME
,
731 &rtas_flash_operations
);
732 if (firmware_update_pde
== NULL
) {
737 rc
= initialize_flash_pde_data("ibm,update-flash-64-and-reboot",
738 sizeof(struct rtas_update_flash_t
),
739 firmware_update_pde
);
743 validate_pde
= create_flash_pde("powerpc/rtas/" VALIDATE_FLASH_NAME
,
744 &validate_flash_operations
);
745 if (validate_pde
== NULL
) {
750 rc
= initialize_flash_pde_data("ibm,validate-flash-image",
751 sizeof(struct rtas_validate_flash_t
),
756 manage_pde
= create_flash_pde("powerpc/rtas/" MANAGE_FLASH_NAME
,
757 &manage_flash_operations
);
758 if (manage_pde
== NULL
) {
763 rc
= initialize_flash_pde_data("ibm,manage-flash-image",
764 sizeof(struct rtas_manage_flash_t
),
769 rtas_flash_term_hook
= rtas_flash_firmware
;
771 flash_block_cache
= kmem_cache_create("rtas_flash_cache",
772 RTAS_BLK_SIZE
, RTAS_BLK_SIZE
, 0,
774 if (!flash_block_cache
) {
775 printk(KERN_ERR
"%s: failed to create block cache\n",
783 remove_flash_pde(firmware_flash_pde
);
784 remove_flash_pde(firmware_update_pde
);
785 remove_flash_pde(validate_pde
);
786 remove_flash_pde(manage_pde
);
791 static void __exit
rtas_flash_cleanup(void)
793 rtas_flash_term_hook
= NULL
;
795 if (flash_block_cache
)
796 kmem_cache_destroy(flash_block_cache
);
798 remove_flash_pde(firmware_flash_pde
);
799 remove_flash_pde(firmware_update_pde
);
800 remove_flash_pde(validate_pde
);
801 remove_flash_pde(manage_pde
);
804 module_init(rtas_flash_init
);
805 module_exit(rtas_flash_cleanup
);
806 MODULE_LICENSE("GPL");