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 }
66