| /* |
| * Copyright 2013 Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Ben Skeggs |
| */ |
| |
| #include <subdev/bios.h> |
| #include <subdev/bios/bit.h> |
| #include <subdev/bios/rammap.h> |
| |
| u16 |
| nvbios_rammap_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, |
| u8 *cnt, u8 *len, u8 *snr, u8 *ssz) |
| { |
| struct bit_entry bit_P; |
| u16 rammap = 0x0000; |
| |
| if (!bit_entry(bios, 'P', &bit_P)) { |
| if (bit_P.version == 2) |
| rammap = nv_ro16(bios, bit_P.offset + 4); |
| |
| if (rammap) { |
| *ver = nv_ro08(bios, rammap + 0); |
| switch (*ver) { |
| case 0x10: |
| case 0x11: |
| *hdr = nv_ro08(bios, rammap + 1); |
| *cnt = nv_ro08(bios, rammap + 5); |
| *len = nv_ro08(bios, rammap + 2); |
| *snr = nv_ro08(bios, rammap + 4); |
| *ssz = nv_ro08(bios, rammap + 3); |
| return rammap; |
| default: |
| break; |
| } |
| } |
| } |
| |
| return 0x0000; |
| } |
| |
| u16 |
| nvbios_rammap_entry(struct nouveau_bios *bios, int idx, |
| u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| u8 snr, ssz; |
| u16 rammap = nvbios_rammap_table(bios, ver, hdr, cnt, len, &snr, &ssz); |
| if (rammap && idx < *cnt) { |
| rammap = rammap + *hdr + (idx * (*len + (snr * ssz))); |
| *hdr = *len; |
| *cnt = snr; |
| *len = ssz; |
| return rammap; |
| } |
| return 0x0000; |
| } |
| |
| u16 |
| nvbios_rammap_match(struct nouveau_bios *bios, u16 khz, |
| u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| int idx = 0; |
| u32 data; |
| while ((data = nvbios_rammap_entry(bios, idx++, ver, hdr, cnt, len))) { |
| if (khz >= nv_ro16(bios, data + 0x00) && |
| khz <= nv_ro16(bios, data + 0x02)) |
| break; |
| } |
| return data; |
| } |
