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