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/bit.h>
26 #include <subdev/bios/image.h>
27 #include <subdev/bios/pmu.h>
28
29 static u32
weirdo_pointer(struct nvkm_bios * bios,u32 data)30 weirdo_pointer(struct nvkm_bios *bios, u32 data)
31 {
32 struct nvbios_image image;
33 int idx = 0;
34 if (nvbios_image(bios, idx++, &image)) {
35 data -= image.size;
36 while (nvbios_image(bios, idx++, &image)) {
37 if (image.type == 0xe0)
38 return image.base + data;
39 }
40 }
41 return 0;
42 }
43
44 u32
nvbios_pmuTe(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)45 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
46 {
47 struct bit_entry bit_p;
48 u32 data = 0;
49
50 if (!bit_entry(bios, 'p', &bit_p)) {
51 if (bit_p.version == 2 && bit_p.length >= 4)
52 data = nvbios_rd32(bios, bit_p.offset + 0x00);
53 if ((data = weirdo_pointer(bios, data))) {
54 *ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
55 *hdr = nvbios_rd08(bios, data + 0x01);
56 *len = nvbios_rd08(bios, data + 0x02);
57 *cnt = nvbios_rd08(bios, data + 0x03);
58 }
59 }
60
61 return data;
62 }
63
64 u32
nvbios_pmuEe(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr)65 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
66 {
67 u8 cnt, len;
68 u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
69 if (data && idx < cnt) {
70 data = data + *hdr + (idx * len);
71 *hdr = len;
72 return data;
73 }
74 return 0;
75 }
76
77 u32
nvbios_pmuEp(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,struct nvbios_pmuE * info)78 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
79 struct nvbios_pmuE *info)
80 {
81 u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
82 memset(info, 0x00, sizeof(*info));
83 switch (!!data * *ver) {
84 default:
85 info->type = nvbios_rd08(bios, data + 0x00);
86 info->data = nvbios_rd32(bios, data + 0x02);
87 break;
88 }
89 return data;
90 }
91
92 bool
nvbios_pmuRm(struct nvkm_bios * bios,u8 type,struct nvbios_pmuR * info)93 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
94 {
95 struct nvbios_pmuE pmuE;
96 u8 ver, hdr, idx = 0;
97 u32 data;
98 memset(info, 0x00, sizeof(*info));
99 while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
100 if ( pmuE.type == type &&
101 (data = weirdo_pointer(bios, pmuE.data))) {
102 info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
103 info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
104 info->boot_addr = data + 0x30;
105 info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
106 nvbios_rd32(bios, data + 0x18);
107 info->boot_size = nvbios_rd32(bios, data + 0x1c) -
108 nvbios_rd32(bios, data + 0x18);
109 info->code_addr = info->boot_addr + info->boot_size;
110 info->code_addr_pmu = info->boot_addr_pmu +
111 info->boot_size;
112 info->code_size = nvbios_rd32(bios, data + 0x20);
113 info->data_addr = data + 0x30 +
114 nvbios_rd32(bios, data + 0x24);
115 info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
116 info->data_size = nvbios_rd32(bios, data + 0x2c);
117 return true;
118 }
119 }
120 return false;
121 }
122