2 /* flash.c: Allow mmap access to the OBP Flash, for OBP updates.
31 } flash;  variable
40 	if (flash.read_base == flash.write_base) {  in flash_mmap()
41 		addr = flash.read_base;  in flash_mmap()
42 		size = flash.read_size;  in flash_mmap()
50 			addr = flash.read_base;  in flash_mmap()
51 			size = flash.read_size;  in flash_mmap()
53 			addr = flash.write_base;  in flash_mmap()
54 			size = flash.write_size;  in flash_mmap()
87 			if (file->f_pos > flash.read_size)  in flash_llseek()
88 				file->f_pos = flash.read_size;  in flash_llseek()
91 			file->f_pos = flash.read_size;  in flash_llseek()
108 	if (count > flash.read_size - p)  in flash_read()
109 		count = flash.read_size - p;  in flash_read()
112 		u8 data = upa_readb(flash.read_base + p + i);  in flash_read()
126 	if (test_and_set_bit(0, (void *)&flash.busy) != 0) {  in flash_open()
139 	flash.busy = 0;  in flash_release()
146 	/* no write to the Flash, use mmap
147 	 * and play flash dependent tricks.
157 static struct miscdevice flash_dev = { SBUS_FLASH_MINOR, "flash", &flash_fops };
171 	flash.read_base = op->resource[0].start;  in flash_probe()
172 	flash.read_size = resource_size(&op->resource[0]);  in flash_probe()
174 		flash.write_base = op->resource[1].start;  in flash_probe()
175 		flash.write_size = resource_size(&op->resource[1]);  in flash_probe()
177 		flash.write_base = op->resource[0].start;  in flash_probe()
178 		flash.write_size = resource_size(&op->resource[0]);  in flash_probe()
180 	flash.busy = 0;  in flash_probe()
182 	printk(KERN_INFO "%pOF: OBP Flash, RD %lx[%lx] WR %lx[%lx]\n",  in flash_probe()
184 	       flash.read_base, flash.read_size,  in flash_probe()
185 	       flash.write_base, flash.write_size);  in flash_probe()
207 		.name = "flash",