1 /*
2  * Copyright 2014 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs <bskeggs@redhat.com>
23  */
24 #include <subdev/bios.h>
25 #include <subdev/bios/npde.h>
26 #include <subdev/bios/pcir.h>
27 
28 u32
29 nvbios_npdeTe(struct nvkm_bios *bios, u32 base)
30 {
31 	struct nvbios_pcirT pcir;
32 	u8  ver; u16 hdr;
33 	u32 data = nvbios_pcirTp(bios, base, &ver, &hdr, &pcir);
34 	if (data = (data + hdr + 0x0f) & ~0x0f, data) {
35 		switch (nvbios_rd32(bios, data + 0x00)) {
36 		case 0x4544504e: /* NPDE */
37 			break;
38 		default:
39 			nvkm_debug(&bios->subdev,
40 				   "%08x: NPDE signature (%08x) unknown\n",
41 				   data, nvbios_rd32(bios, data + 0x00));
42 			data = 0;
43 			break;
44 		}
45 	}
46 	return data;
47 }
48 
49 u32
50 nvbios_npdeTp(struct nvkm_bios *bios, u32 base, struct nvbios_npdeT *info)
51 {
52 	u32 data = nvbios_npdeTe(bios, base);
53 	memset(info, 0x00, sizeof(*info));
54 	if (data) {
55 		info->image_size = nvbios_rd16(bios, data + 0x08) * 512;
56 		info->last = nvbios_rd08(bios, data + 0x0a) & 0x80;
57 	}
58 	return data;
59 }
60