11  * "NVRAM" (NV stands for non-volatile).
13  * The data are supplied as a (seekable) character device, /dev/nvram. The
18  * Checksums over the NVRAM contents are managed by this driver. In case of a
20  * to a sane state either by ioctl(NVRAM_INIT) (clear whole NVRAM) or
25  * want to access the NVRAM: nvram_{read,write,check_checksum,set_checksum}.
41 #include <linux/nvram.h>
52 #  error Cannot build nvram driver for this machine configuration.
137  * purpose memory in the NVRAM - that is to say, they all add the
138  * NVRAM_FIRST_BYTE offset.  Pass them offsets into NVRAM as if you did not
212  * The are the file operation function for user access to /dev/nvram
297 		/* initialize NVRAM contents and checksum */  in nvram_ioctl()
394 	if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read))  in nvram_add_proc_fs()
413 	"nvram",
427 		printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",  in nvram_init()
433 		printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");  in nvram_init()
447 	remove_proc_entry("driver/nvram", NULL);  in nvram_cleanup_module()
498 static void pc_proc_infos(unsigned char *nvram, struct seq_file *seq,  in pc_proc_infos()  argument
511 	    (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0);  in pc_proc_infos()
513 	type = nvram[2] >> 4;  in pc_proc_infos()
519 	type = nvram[2] & 0x0f;  in pc_proc_infos()
526 	type = nvram[4] >> 4;  in pc_proc_infos()
528 		seq_printf(seq, "%02x\n", type == 0x0f ? nvram[11] : type);  in pc_proc_infos()
533 	type = nvram[4] & 0x0f;  in pc_proc_infos()
535 		seq_printf(seq, "%02x\n", type == 0x0f ? nvram[12] : type);  in pc_proc_infos()
540 	    nvram[18] | (nvram[19] << 8),  in pc_proc_infos()
541 	    nvram[20], nvram[25],  in pc_proc_infos()
542 	    nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8));  in pc_proc_infos()
544 	    nvram[39] | (nvram[40] << 8),  in pc_proc_infos()
545 	    nvram[41], nvram[46],  in pc_proc_infos()
546 	    nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8));  in pc_proc_infos()
548 	seq_printf(seq, "DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));  in pc_proc_infos()
550 	    nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8));  in pc_proc_infos()
553 	    gfx_types[(nvram[6] >> 4) & 3]);  in pc_proc_infos()
556 	    (nvram[6] & 2) ? "" : "not ");  in pc_proc_infos()
628 static void atari_proc_infos(unsigned char *nvram, struct seq_file *seq,  in atari_proc_infos()  argument
639 		if (nvram[1] == boot_prefs[i].val) {  in atari_proc_infos()
645 		seq_printf(seq, "0x%02x (undefined)\n", nvram[1]);  in atari_proc_infos()
648 	    (nvram[16] & 0x80) ? "on" : "off");  in atari_proc_infos()
650 	if (nvram[16] & 0x80)  in atari_proc_infos()
651 		seq_printf(seq, "%d\n", nvram[16] & 7);  in atari_proc_infos()
660 	if (nvram[6] < ARRAY_SIZE(languages))  in atari_proc_infos()
661 		seq_printf(seq, "%s\n", languages[nvram[6]]);  in atari_proc_infos()
663 		seq_printf(seq, "%u (undefined)\n", nvram[6]);  in atari_proc_infos()
665 	if (nvram[7] < ARRAY_SIZE(languages))  in atari_proc_infos()
666 		seq_printf(seq, "%s\n", languages[nvram[7]]);  in atari_proc_infos()
668 		seq_printf(seq, "%u (undefined)\n", nvram[7]);  in atari_proc_infos()
670 	seq_printf(seq, dateformat[nvram[8] & 7],  in atari_proc_infos()
671 	    nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');  in atari_proc_infos()
672 	seq_printf(seq, ", %dh clock\n", nvram[8] & 16 ? 24 : 12);  in atari_proc_infos()
674 	if (nvram[10] == 0)  in atari_proc_infos()
677 		seq_printf(seq, "%ds%s\n", nvram[10],  in atari_proc_infos()
678 		    nvram[10] < 8 ? ", no memory test" : "");  in atari_proc_infos()
680 	vmode = (nvram[14] << 8) | nvram[15];  in atari_proc_infos()