2 * CMOS/NV-RAM driver for Linux
4 * Copyright (C) 1997 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
5 * idea by and with help from Richard Jelinek <rj@suse.de>
6 * Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
8 * This driver allows you to access the contents of the non-volatile memory in
9 * the mc146818rtc.h real-time clock. This chip is built into all PCs and into
10 * many Atari machines. In the former it's called "CMOS-RAM", in the latter
11 * "NVRAM" (NV stands for non-volatile).
13 * The data are supplied as a (seekable) character device, /dev/nvram. The
14 * size of this file is dependant on the controller. The usual size is 114,
15 * the number of freely available bytes in the memory (i.e., not used by the
18 * Checksums over the NVRAM contents are managed by this driver. In case of a
19 * bad checksum, reads and writes return -EIO. The checksum can be initialized
20 * to a sane state either by ioctl(NVRAM_INIT) (clear whole NVRAM) or
21 * ioctl(NVRAM_SETCKS) (doesn't change contents, just makes checksum valid
22 * again; use with care!)
24 * This file also provides some functions for other parts of the kernel that
25 * want to access the NVRAM: nvram_{read,write,check_checksum,set_checksum}.
26 * Obviously this can be used only if this driver is always configured into
27 * the kernel and is not a module. Since the functions are used by some Atari
28 * drivers, this is the case on the Atari.
31 * 1.1 Cesar Barros: SMP locking fixes
33 * 1.2 Erik Gilling: Cobalt Networks support
34 * Tim Hockin: general cleanup, Cobalt support
37 #define NVRAM_VERSION "1.2"
39 #include <linux/module.h>
40 #include <linux/config.h>
41 #include <linux/sched.h>
42 #include <linux/smp_lock.h>
43 #include <linux/nvram.h>
49 /* select machine configuration */
50 #if defined(CONFIG_ATARI)
52 #elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and others?? */
54 # if defined(CONFIG_COBALT)
55 # include <linux/cobalt-nvram.h>
61 # error Cannot build nvram driver for this machine configuration.
67 #define CHECK_DRIVER_INIT() 1
69 /* On PCs, the checksum is built only over bytes 2..31 */
70 #define PC_CKS_RANGE_START 2
71 #define PC_CKS_RANGE_END 31
73 #define NVRAM_BYTES (128-NVRAM_FIRST_BYTE)
75 #define mach_check_checksum pc_check_checksum
76 #define mach_set_checksum pc_set_checksum
77 #define mach_proc_infos pc_proc_infos
83 #define CHECK_DRIVER_INIT() 1
85 #define NVRAM_BYTES (128-NVRAM_FIRST_BYTE)
87 #define mach_check_checksum cobalt_check_checksum
88 #define mach_set_checksum cobalt_set_checksum
89 #define mach_proc_infos cobalt_proc_infos
95 /* Special parameters for RTC in Atari machines */
96 #include <asm/atarihw.h>
97 #include <asm/atariints.h>
98 #define RTC_PORT(x) (TT_RTC_BAS + 2*(x))
99 #define CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
101 #define NVRAM_BYTES 50
103 /* On Ataris, the checksum is over all bytes except the checksum bytes
104 * themselves; these are at the very end */
105 #define ATARI_CKS_RANGE_START 0
106 #define ATARI_CKS_RANGE_END 47
107 #define ATARI_CKS_LOC 48
109 #define mach_check_checksum atari_check_checksum
110 #define mach_set_checksum atari_set_checksum
111 #define mach_proc_infos atari_proc_infos
115 /* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with
116 * rtc_lock held. Due to the index-port/data-port design of the RTC, we
117 * don't want two different things trying to get to it at once. (e.g. the
118 * periodic 11 min sync from time.c vs. this driver.)
121 #include <linux/types.h>
122 #include <linux/errno.h>
123 #include <linux/miscdevice.h>
124 #include <linux/slab.h>
125 #include <linux/ioport.h>
126 #include <linux/fcntl.h>
127 #include <linux/mc146818rtc.h>
128 #include <linux/init.h>
129 #include <linux/proc_fs.h>
130 #include <linux/spinlock.h>
133 #include <asm/uaccess.h>
134 #include <asm/system.h>
136 static spinlock_t nvram_state_lock = SPIN_LOCK_UNLOCKED;
137 static int nvram_open_cnt; /* #times opened */
138 static int nvram_open_mode; /* special open modes */
139 #define NVRAM_WRITE 1 /* opened for writing (exclusive) */
140 #define NVRAM_EXCL 2 /* opened with O_EXCL */
142 static int mach_check_checksum(void);
143 static void mach_set_checksum(void);
145 #ifdef CONFIG_PROC_FS
146 static int mach_proc_infos(unsigned char *contents, char *buffer, int *len,
147 off_t *begin, off_t offset, int size);
151 * These functions are provided to be called internally or by other parts of
152 * the kernel. It's up to the caller to ensure correct checksum before reading
153 * or after writing (needs to be done only once).
155 * It is worth noting that these functions all access bytes of general
156 * purpose memory in the NVRAM - that is to say, they all add the
157 * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not
158 * know about the RTC cruft.
162 __nvram_read_byte(int i)
164 return CMOS_READ(NVRAM_FIRST_BYTE + i);
168 nvram_read_byte(int i)
173 spin_lock_irqsave(&rtc_lock, flags);
174 c = __nvram_read_byte(i);
175 spin_unlock_irqrestore(&rtc_lock, flags);
179 /* This races nicely with trying to read with checksum checking (nvram_read) */
181 __nvram_write_byte(unsigned char c, int i)
183 CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
187 nvram_write_byte(unsigned char c, int i)
191 spin_lock_irqsave(&rtc_lock, flags);
192 __nvram_write_byte(c, i);
193 spin_unlock_irqrestore(&rtc_lock, flags);
197 __nvram_check_checksum(void)
199 return mach_check_checksum();
203 nvram_check_checksum(void)
208 spin_lock_irqsave(&rtc_lock, flags);
209 rv = __nvram_check_checksum();
210 spin_unlock_irqrestore(&rtc_lock, flags);
215 __nvram_set_checksum(void)
221 nvram_set_checksum(void)
225 spin_lock_irqsave(&rtc_lock, flags);
226 __nvram_set_checksum();
227 spin_unlock_irqrestore(&rtc_lock, flags);
231 * The are the file operation function for user access to /dev/nvram
235 nvram_llseek(struct file *file, loff_t offset, int origin)
242 offset += file->f_pos;
245 offset += NVRAM_BYTES;
248 return (offset >= 0) ? (file->f_pos = offset) : -EINVAL;
252 nvram_read(struct file *file, char *buf, size_t count, loff_t *ppos)
254 unsigned char contents[NVRAM_BYTES];
258 spin_lock_irq(&rtc_lock);
260 if (!__nvram_check_checksum())
263 for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
264 *tmp = __nvram_read_byte(i);
266 spin_unlock_irq(&rtc_lock);
268 if (copy_to_user(buf, contents, tmp - contents))
273 return tmp - contents;
276 spin_unlock_irq(&rtc_lock);
281 nvram_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
283 unsigned char contents[NVRAM_BYTES];
288 len = (NVRAM_BYTES - i) < count ? (NVRAM_BYTES - i) : count;
289 if (copy_from_user(contents, buf, len))
292 spin_lock_irq(&rtc_lock);
294 if (!__nvram_check_checksum())
297 for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
298 __nvram_write_byte(*tmp, i);
300 __nvram_set_checksum();
302 spin_unlock_irq(&rtc_lock);
306 return tmp - contents;
309 spin_unlock_irq(&rtc_lock);
314 nvram_ioctl(struct inode *inode, struct file *file,
315 unsigned int cmd, unsigned long arg)
322 /* initialize NVRAM contents and checksum */
323 if (!capable(CAP_SYS_ADMIN))
326 spin_lock_irq(&rtc_lock);
328 for (i = 0; i < NVRAM_BYTES; ++i)
329 __nvram_write_byte(0, i);
330 __nvram_set_checksum();
332 spin_unlock_irq(&rtc_lock);
336 /* just set checksum, contents unchanged (maybe useful after
337 * checksum garbaged somehow...) */
338 if (!capable(CAP_SYS_ADMIN))
341 spin_lock_irq(&rtc_lock);
342 __nvram_set_checksum();
343 spin_unlock_irq(&rtc_lock);
352 nvram_open(struct inode *inode, struct file *file)
354 spin_lock(&nvram_state_lock);
356 if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
357 (nvram_open_mode & NVRAM_EXCL) ||
358 ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
359 spin_unlock(&nvram_state_lock);
363 if (file->f_flags & O_EXCL)
364 nvram_open_mode |= NVRAM_EXCL;
365 if (file->f_mode & 2)
366 nvram_open_mode |= NVRAM_WRITE;
369 spin_unlock(&nvram_state_lock);
375 nvram_release(struct inode *inode, struct file *file)
377 spin_lock(&nvram_state_lock);
381 /* if only one instance is open, clear the EXCL bit */
382 if (nvram_open_mode & NVRAM_EXCL)
383 nvram_open_mode &= ~NVRAM_EXCL;
384 if (file->f_mode & 2)
385 nvram_open_mode &= ~NVRAM_WRITE;
387 spin_unlock(&nvram_state_lock);
392 #ifndef CONFIG_PROC_FS
394 nvram_read_proc(char *buffer, char **start, off_t offset,
395 int size, int *eof, void *data)
402 nvram_read_proc(char *buffer, char **start, off_t offset,
403 int size, int *eof, void *data)
405 unsigned char contents[NVRAM_BYTES];
409 spin_lock_irq(&rtc_lock);
410 for (i = 0; i < NVRAM_BYTES; ++i)
411 contents[i] = __nvram_read_byte(i);
412 spin_unlock_irq(&rtc_lock);
414 *eof = mach_proc_infos(contents, buffer, &len, &begin, offset, size);
416 if (offset >= begin + len)
418 *start = buffer + (offset - begin);
419 return (size < begin + len - offset) ? size : begin + len - offset;
423 /* This macro frees the machine specific function from bounds checking and
424 * this like that... */
425 #define PRINT_PROC(fmt,args...) \
427 *len += sprintf(buffer+*len, fmt, ##args); \
428 if (*begin + *len > offset + size) \
430 if (*begin + *len < offset) { \
436 #endif /* CONFIG_PROC_FS */
438 static struct file_operations nvram_fops = {
440 llseek: nvram_llseek,
445 release: nvram_release,
448 static struct miscdevice nvram_dev = {
459 /* First test whether the driver should init at all */
460 if (!CHECK_DRIVER_INIT())
463 ret = misc_register(&nvram_dev);
465 printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",
469 if (!create_proc_read_entry("driver/nvram", 0, 0, nvram_read_proc,
471 printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");
476 printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n");
480 misc_deregister(&nvram_dev);
485 nvram_cleanup_module(void)
487 remove_proc_entry("driver/nvram", 0);
488 misc_deregister(&nvram_dev);
491 module_init(nvram_init);
492 module_exit(nvram_cleanup_module);
495 * Machine specific functions
501 pc_check_checksum(void)
504 unsigned short sum = 0;
505 unsigned short expect;
507 for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
508 sum += __nvram_read_byte(i);
509 expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
510 __nvram_read_byte(PC_CKS_LOC+1);
511 return ((sum & 0xffff) == expect);
515 pc_set_checksum(void)
518 unsigned short sum = 0;
520 for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
521 sum += __nvram_read_byte(i);
522 __nvram_write_byte(sum >> 8, PC_CKS_LOC);
523 __nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1);
526 #ifdef CONFIG_PROC_FS
528 static char *floppy_types[] = {
529 "none", "5.25'' 360k", "5.25'' 1.2M", "3.5'' 720k", "3.5'' 1.44M",
530 "3.5'' 2.88M", "3.5'' 2.88M"
533 static char *gfx_types[] = {
534 "EGA, VGA, ... (with BIOS)",
541 pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
542 off_t *begin, off_t offset, int size)
547 spin_lock_irq(&rtc_lock);
548 checksum = __nvram_check_checksum();
549 spin_unlock_irq(&rtc_lock);
551 PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
553 PRINT_PROC("# floppies : %d\n",
554 (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0);
555 PRINT_PROC("Floppy 0 type : ");
556 type = nvram[2] >> 4;
557 if (type < sizeof (floppy_types) / sizeof (*floppy_types))
558 PRINT_PROC("%s\n", floppy_types[type]);
560 PRINT_PROC("%d (unknown)\n", type);
561 PRINT_PROC("Floppy 1 type : ");
562 type = nvram[2] & 0x0f;
563 if (type < sizeof (floppy_types) / sizeof (*floppy_types))
564 PRINT_PROC("%s\n", floppy_types[type]);
566 PRINT_PROC("%d (unknown)\n", type);
568 PRINT_PROC("HD 0 type : ");
569 type = nvram[4] >> 4;
571 PRINT_PROC("%02x\n", type == 0x0f ? nvram[11] : type);
573 PRINT_PROC("none\n");
575 PRINT_PROC("HD 1 type : ");
576 type = nvram[4] & 0x0f;
578 PRINT_PROC("%02x\n", type == 0x0f ? nvram[12] : type);
580 PRINT_PROC("none\n");
582 PRINT_PROC("HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
583 nvram[18] | (nvram[19] << 8),
584 nvram[20], nvram[25],
585 nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8));
586 PRINT_PROC("HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
587 nvram[39] | (nvram[40] << 8),
588 nvram[41], nvram[46],
589 nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8));
591 PRINT_PROC("DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));
592 PRINT_PROC("Extended memory: %d kB (configured), %d kB (tested)\n",
593 nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8));
595 PRINT_PROC("Gfx adapter : %s\n", gfx_types[(nvram[6] >> 4) & 3]);
597 PRINT_PROC("FPU : %sinstalled\n",
598 (nvram[6] & 2) ? "" : "not ");
604 #endif /* MACH == PC */
608 /* the cobalt CMOS has a wider range of it's checksum */
609 static int cobalt_check_checksum(void)
612 unsigned short sum = 0;
613 unsigned short expect;
615 for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
616 if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
619 sum += __nvram_read_byte(i);
621 expect = __nvram_read_byte(COBT_CMOS_CHECKSUM) << 8 |
622 __nvram_read_byte(COBT_CMOS_CHECKSUM+1);
623 return ((sum & 0xffff) == expect);
626 static void cobalt_set_checksum(void)
629 unsigned short sum = 0;
631 for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
632 if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
635 sum += __nvram_read_byte(i);
638 __nvram_write_byte(sum >> 8, COBT_CMOS_CHECKSUM);
639 __nvram_write_byte(sum & 0xff, COBT_CMOS_CHECKSUM+1);
642 #ifdef CONFIG_PROC_FS
644 static int cobalt_proc_infos(unsigned char *nvram, char *buffer, int *len,
645 off_t *begin, off_t offset, int size)
648 unsigned int checksum;
651 char *key = "cNoEbTaWlOtR!";
652 unsigned char bto_csum;
654 spin_lock_irq(&rtc_lock);
655 checksum = __nvram_check_checksum();
656 spin_unlock_irq(&rtc_lock);
658 PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
660 flags = nvram[COBT_CMOS_FLAG_BYTE_0] << 8
661 | nvram[COBT_CMOS_FLAG_BYTE_1];
663 PRINT_PROC("Console: %s\n",
664 flags & COBT_CMOS_CONSOLE_FLAG ? "on": "off");
666 PRINT_PROC("Firmware Debug Messages: %s\n",
667 flags & COBT_CMOS_DEBUG_FLAG ? "on": "off");
669 PRINT_PROC("Auto Prompt: %s\n",
670 flags & COBT_CMOS_AUTO_PROMPT_FLAG ? "on": "off");
672 PRINT_PROC("Shutdown Status: %s\n",
673 flags & COBT_CMOS_CLEAN_BOOT_FLAG ? "clean": "dirty");
675 PRINT_PROC("Hardware Probe: %s\n",
676 flags & COBT_CMOS_HW_NOPROBE_FLAG ? "partial": "full");
678 PRINT_PROC("System Fault: %sdetected\n",
679 flags & COBT_CMOS_SYSFAULT_FLAG ? "": "not ");
681 PRINT_PROC("Panic on OOPS: %s\n",
682 flags & COBT_CMOS_OOPSPANIC_FLAG ? "yes": "no");
684 PRINT_PROC("Delayed Cache Initialization: %s\n",
685 flags & COBT_CMOS_DELAY_CACHE_FLAG ? "yes": "no");
687 PRINT_PROC("Show Logo at Boot: %s\n",
688 flags & COBT_CMOS_NOLOGO_FLAG ? "no": "yes");
690 PRINT_PROC("Boot Method: ");
691 switch (nvram[COBT_CMOS_BOOT_METHOD]) {
692 case COBT_CMOS_BOOT_METHOD_DISK:
693 PRINT_PROC("disk\n");
696 case COBT_CMOS_BOOT_METHOD_ROM:
700 case COBT_CMOS_BOOT_METHOD_NET:
705 PRINT_PROC("unknown\n");
709 PRINT_PROC("Primary Boot Device: %d:%d\n",
710 nvram[COBT_CMOS_BOOT_DEV0_MAJ],
711 nvram[COBT_CMOS_BOOT_DEV0_MIN] );
712 PRINT_PROC("Secondary Boot Device: %d:%d\n",
713 nvram[COBT_CMOS_BOOT_DEV1_MAJ],
714 nvram[COBT_CMOS_BOOT_DEV1_MIN] );
715 PRINT_PROC("Tertiary Boot Device: %d:%d\n",
716 nvram[COBT_CMOS_BOOT_DEV2_MAJ],
717 nvram[COBT_CMOS_BOOT_DEV2_MIN] );
719 PRINT_PROC("Uptime: %d\n",
720 nvram[COBT_CMOS_UPTIME_0] << 24 |
721 nvram[COBT_CMOS_UPTIME_1] << 16 |
722 nvram[COBT_CMOS_UPTIME_2] << 8 |
723 nvram[COBT_CMOS_UPTIME_3]);
725 PRINT_PROC("Boot Count: %d\n",
726 nvram[COBT_CMOS_BOOTCOUNT_0] << 24 |
727 nvram[COBT_CMOS_BOOTCOUNT_1] << 16 |
728 nvram[COBT_CMOS_BOOTCOUNT_2] << 8 |
729 nvram[COBT_CMOS_BOOTCOUNT_3]);
731 /* 13 bytes of serial num */
732 for (i=0 ; i<13 ; i++) {
733 sernum[i] = nvram[COBT_CMOS_SYS_SERNUM_0 + i];
738 for (i=0 ; i<13 ; i++) {
739 checksum += sernum[i] ^ key[i];
741 checksum = ((checksum & 0x7f) ^ (0xd6)) & 0xff;
743 PRINT_PROC("Serial Number: %s", sernum);
744 if (checksum != nvram[COBT_CMOS_SYS_SERNUM_CSUM]) {
745 PRINT_PROC(" (invalid checksum)");
749 PRINT_PROC("Rom Revison: %d.%d.%d\n", nvram[COBT_CMOS_ROM_REV_MAJ],
750 nvram[COBT_CMOS_ROM_REV_MIN], nvram[COBT_CMOS_ROM_REV_REV]);
752 PRINT_PROC("BTO Server: %d.%d.%d.%d", nvram[COBT_CMOS_BTO_IP_0],
753 nvram[COBT_CMOS_BTO_IP_1], nvram[COBT_CMOS_BTO_IP_2],
754 nvram[COBT_CMOS_BTO_IP_3]);
755 bto_csum = nvram[COBT_CMOS_BTO_IP_0] + nvram[COBT_CMOS_BTO_IP_1]
756 + nvram[COBT_CMOS_BTO_IP_2] + nvram[COBT_CMOS_BTO_IP_3];
757 if (bto_csum != nvram[COBT_CMOS_BTO_IP_CSUM]) {
758 PRINT_PROC(" (invalid checksum)");
762 if (flags & COBT_CMOS_VERSION_FLAG
763 && nvram[COBT_CMOS_VERSION] >= COBT_CMOS_VER_BTOCODE) {
764 PRINT_PROC("BTO Code: 0x%x\n",
765 nvram[COBT_CMOS_BTO_CODE_0] << 24 |
766 nvram[COBT_CMOS_BTO_CODE_1] << 16 |
767 nvram[COBT_CMOS_BTO_CODE_2] << 8 |
768 nvram[COBT_CMOS_BTO_CODE_3]);
773 #endif /* CONFIG_PROC_FS */
775 #endif /* MACH == COBALT */
780 atari_check_checksum(void)
783 unsigned char sum = 0;
785 for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
786 sum += __nvram_read_byte(i);
787 return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff) &&
788 __nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
792 atari_set_checksum(void)
795 unsigned char sum = 0;
797 for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
798 sum += __nvram_read_byte(i);
799 __nvram_write_byte(~sum, ATARI_CKS_LOC);
800 __nvram_write_byte(sum, ATARI_CKS_LOC + 1);
803 #ifdef CONFIG_PROC_FS
811 { 0x20, "NetBSD (?)" },
813 { 0x00, "unspecified" }
816 static char *languages[] = {
828 static char *dateformat[] = {
839 static char *colors[] = {
840 "2", "4", "16", "256", "65536", "??", "??", "??"
843 #define fieldsize(a) (sizeof(a)/sizeof(*a))
846 atari_proc_infos(unsigned char *nvram, char *buffer, int *len,
847 off_t *begin, off_t offset, int size)
849 int checksum = nvram_check_checksum();
853 PRINT_PROC("Checksum status : %svalid\n", checksum ? "" : "not ");
855 PRINT_PROC("Boot preference : ");
856 for (i = fieldsize(boot_prefs) - 1; i >= 0; --i) {
857 if (nvram[1] == boot_prefs[i].val) {
858 PRINT_PROC("%s\n", boot_prefs[i].name);
863 PRINT_PROC("0x%02x (undefined)\n", nvram[1]);
865 PRINT_PROC("SCSI arbitration : %s\n",
866 (nvram[16] & 0x80) ? "on" : "off");
867 PRINT_PROC("SCSI host ID : ");
868 if (nvram[16] & 0x80)
869 PRINT_PROC("%d\n", nvram[16] & 7);
873 /* the following entries are defined only for the Falcon */
874 if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON)
877 PRINT_PROC("OS language : ");
878 if (nvram[6] < fieldsize(languages))
879 PRINT_PROC("%s\n", languages[nvram[6]]);
881 PRINT_PROC("%u (undefined)\n", nvram[6]);
882 PRINT_PROC("Keyboard language: ");
883 if (nvram[7] < fieldsize(languages))
884 PRINT_PROC("%s\n", languages[nvram[7]]);
886 PRINT_PROC("%u (undefined)\n", nvram[7]);
887 PRINT_PROC("Date format : ");
888 PRINT_PROC(dateformat[nvram[8] & 7],
889 nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');
890 PRINT_PROC(", %dh clock\n", nvram[8] & 16 ? 24 : 12);
891 PRINT_PROC("Boot delay : ");
893 PRINT_PROC("default");
895 PRINT_PROC("%ds%s\n", nvram[10],
896 nvram[10] < 8 ? ", no memory test" : "");
898 vmode = (nvram[14] << 8) || nvram[15];
899 PRINT_PROC("Video mode : %s colors, %d columns, %s %s monitor\n",
902 vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC");
903 PRINT_PROC(" %soverscan, compat. mode %s%s\n",
904 vmode & 64 ? "" : "no ",
905 vmode & 128 ? "on" : "off",
907 (vmode & 16 ? ", line doubling" : ", half screen") : "");
913 #endif /* MACH == ATARI */
915 MODULE_LICENSE("GPL");
917 EXPORT_SYMBOL(__nvram_read_byte);
918 EXPORT_SYMBOL(nvram_read_byte);
919 EXPORT_SYMBOL(__nvram_write_byte);
920 EXPORT_SYMBOL(nvram_write_byte);
921 EXPORT_SYMBOL(__nvram_check_checksum);
922 EXPORT_SYMBOL(nvram_check_checksum);
923 EXPORT_SYMBOL(__nvram_set_checksum);
924 EXPORT_SYMBOL(nvram_set_checksum);