shadowrom.c (1992B)
1/* 2 * Copyright 2012 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 */ 23#include "priv.h" 24 25#include <subdev/pci.h> 26 27static u32 28prom_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) 29{ 30 struct nvkm_device *device = data; 31 u32 i; 32 if (offset + length <= 0x00100000) { 33 for (i = offset; i < offset + length; i += 4) 34 *(u32 *)&bios->data[i] = nvkm_rd32(device, 0x300000 + i); 35 return length; 36 } 37 return 0; 38} 39 40static void 41prom_fini(void *data) 42{ 43 struct nvkm_device *device = data; 44 nvkm_pci_rom_shadow(device->pci, true); 45} 46 47static void * 48prom_init(struct nvkm_bios *bios, const char *name) 49{ 50 struct nvkm_device *device = bios->subdev.device; 51 if (device->card_type == NV_40 && device->chipset >= 0x4c) 52 return ERR_PTR(-ENODEV); 53 nvkm_pci_rom_shadow(device->pci, false); 54 return device; 55} 56 57const struct nvbios_source 58nvbios_rom = { 59 .name = "PROM", 60 .init = prom_init, 61 .fini = prom_fini, 62 .read = prom_read, 63 .rw = false, 64};