1 /*
2 * Copyright 2013 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
23 */
24 #include "ram.h"
25 #include "regsnv04.h"
26
27 const struct nvkm_ram_func
28 nv04_ram_func = {
29 };
30
31 int
32 nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
33 {
34 struct nvkm_device *device = fb->subdev.device;
35 u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
36 u64 size;
37 enum nvkm_ram_type type;
38
39 if (boot0 & 0x00000100) {
40 size = ((boot0 >> 12) & 0xf) * 2 + 2;
41 size *= 1024 * 1024;
42 } else {
43 switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
44 case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
45 size = 32 * 1024 * 1024;
46 break;
47 case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
48 size = 16 * 1024 * 1024;
49 break;
50 case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
51 size = 8 * 1024 * 1024;
52 break;
53 case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
54 size = 4 * 1024 * 1024;
55 break;
56 }
57 }
58
59 if ((boot0 & 0x00000038) <= 0x10)
60 type = NVKM_RAM_TYPE_SGRAM;
61 else
62 type = NVKM_RAM_TYPE_SDRAM;
63
64 return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
65 }