12  * "NVRAM" (NV stands for non-volatile).
14  * The data are supplied as a (seekable) character device, /dev/nvram. The
19  * Checksums over the NVRAM contents are managed by this driver. In case of a
21  * to a sane state either by ioctl(NVRAM_INIT) (clear whole NVRAM) or
35 #include <linux/nvram.h>
53 #include <asm/nvram.h>
71  * purpose memory in the NVRAM - that is to say, they all add the
72  * NVRAM_FIRST_BYTE offset.  Pass them offsets into NVRAM as if you did not
219  * The are the file operation function for user access to /dev/nvram
288 		pr_warn("nvram: Using obsolete PMAC_NVRAM_GET_OFFSET ioctl\n");  in nvram_misc_ioctl()
323 		/* initialize NVRAM contents and checksum */  in nvram_misc_ioctl()
411 static void pc_nvram_proc_read(unsigned char *nvram, struct seq_file *seq,  in pc_nvram_proc_read()  argument
424 	    (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0);  in pc_nvram_proc_read()
426 	type = nvram[2] >> 4;  in pc_nvram_proc_read()
432 	type = nvram[2] & 0x0f;  in pc_nvram_proc_read()
439 	type = nvram[4] >> 4;  in pc_nvram_proc_read()
441 		seq_printf(seq, "%02x\n", type == 0x0f ? nvram[11] : type);  in pc_nvram_proc_read()
446 	type = nvram[4] & 0x0f;  in pc_nvram_proc_read()
448 		seq_printf(seq, "%02x\n", type == 0x0f ? nvram[12] : type);  in pc_nvram_proc_read()
453 	    nvram[18] | (nvram[19] << 8),  in pc_nvram_proc_read()
454 	    nvram[20], nvram[25],  in pc_nvram_proc_read()
455 	    nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8));  in pc_nvram_proc_read()
457 	    nvram[39] | (nvram[40] << 8),  in pc_nvram_proc_read()
458 	    nvram[41], nvram[46],  in pc_nvram_proc_read()
459 	    nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8));  in pc_nvram_proc_read()
461 	seq_printf(seq, "DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));  in pc_nvram_proc_read()
463 	    nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8));  in pc_nvram_proc_read()
466 	    gfx_types[(nvram[6] >> 4) & 3]);  in pc_nvram_proc_read()
469 	    (nvram[6] & 2) ? "" : "not ");  in pc_nvram_proc_read()
502 	"nvram",
516 		pr_err("nvram: can't misc_register on minor=%d\n", NVRAM_MINOR);  in nvram_module_init()
521 	if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read)) {  in nvram_module_init()
522 		pr_err("nvram: can't create /proc/driver/nvram\n");  in nvram_module_init()
535 	remove_proc_entry("driver/nvram", NULL);  in nvram_module_exit()
546 MODULE_ALIAS("devname:nvram");