66 lines · c
1/*2 * Copyright 2013 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24#include "ram.h"25#include "regsnv04.h"26 27const struct nvkm_ram_func28nv04_ram_func = {29};30 31int32nv04_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 else62 type = NVKM_RAM_TYPE_SDRAM;63 64 return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);65}66