1. 根目录:
2. drivers
3. gpu
4. drm
5. nouveau
6. core
7. subdev
8. bios
9. rammap.c

/*
 * 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/ramcfg.h>
#include <subdev/bios/rammap.h>

u32
nvbios_rammapTe(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;
}

u32
nvbios_rammapEe(struct nouveau_bios *bios, int idx,
		u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
	u8  snr, ssz;
	u16 rammap = nvbios_rammapTe(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;
}

u32
nvbios_rammapEm(struct nouveau_bios *bios, u16 khz,
		u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
	int idx = 0;
	u32 data;
	while ((data = nvbios_rammapEe(bios, idx++, ver, hdr, cnt, len))) {
		if (khz >= nv_ro16(bios, data + 0x00) &&
		    khz <= nv_ro16(bios, data + 0x02))
			break;
	}
	return data;
}

u32
nvbios_rammapEp(struct nouveau_bios *bios, u16 khz,
		u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
		struct nvbios_ramcfg *p)
{
	u32 data = nvbios_rammapEm(bios, khz, ver, hdr, cnt, len);
	memset(p, 0x00, sizeof(*p));
	switch (!!data * *ver) {
	case 0x11:
		p->rammap_11_08_01 = (nv_ro08(bios, data + 0x08) & 0x01) >> 0;
		p->rammap_11_08_0c = (nv_ro08(bios, data + 0x08) & 0x0c) >> 2;
		p->rammap_11_08_10 = (nv_ro08(bios, data + 0x08) & 0x10) >> 4;
		p->rammap_11_11_0c = (nv_ro08(bios, data + 0x11) & 0x0c) >> 2;
		break;
	default:
		data = 0;
		break;
	}
	return data;
}

u32
nvbios_rammapSe(struct nouveau_bios *bios, u32 data,
		u8 ever, u8 ehdr, u8 ecnt, u8 elen, int idx,
		u8 *ver, u8 *hdr)
{
	if (idx < ecnt) {
		data = data + ehdr + (idx * elen);
		*ver = ever;
		*hdr = elen;
		return data;
	}
	return 0;
}

u32
nvbios_rammapSp(struct nouveau_bios *bios, u32 data,
		u8 ever, u8 ehdr, u8 ecnt, u8 elen, int idx,
		u8 *ver, u8 *hdr, struct nvbios_ramcfg *p)
{
	data = nvbios_rammapSe(bios, data, ever, ehdr, ecnt, elen, idx, ver, hdr);
	switch (!!data * *ver) {
	case 0x11:
		p->ramcfg_11_01_01 = (nv_ro08(bios, data + 0x01) & 0x01) >> 0;
		p->ramcfg_11_01_02 = (nv_ro08(bios, data + 0x01) & 0x02) >> 1;
		p->ramcfg_11_01_04 = (nv_ro08(bios, data + 0x01) & 0x04) >> 2;
		p->ramcfg_11_01_08 = (nv_ro08(bios, data + 0x01) & 0x08) >> 3;
		p->ramcfg_11_01_10 = (nv_ro08(bios, data + 0x01) & 0x10) >> 4;
		p->ramcfg_11_01_20 = (nv_ro08(bios, data + 0x01) & 0x20) >> 5;
		p->ramcfg_11_01_40 = (nv_ro08(bios, data + 0x01) & 0x40) >> 6;
		p->ramcfg_11_01_80 = (nv_ro08(bios, data + 0x01) & 0x80) >> 7;
		p->ramcfg_11_02_03 = (nv_ro08(bios, data + 0x02) & 0x03) >> 0;
		p->ramcfg_11_02_04 = (nv_ro08(bios, data + 0x02) & 0x04) >> 2;
		p->ramcfg_11_02_08 = (nv_ro08(bios, data + 0x02) & 0x08) >> 3;
		p->ramcfg_11_02_10 = (nv_ro08(bios, data + 0x02) & 0x10) >> 4;
		p->ramcfg_11_02_40 = (nv_ro08(bios, data + 0x02) & 0x40) >> 6;
		p->ramcfg_11_02_80 = (nv_ro08(bios, data + 0x02) & 0x80) >> 7;
		p->ramcfg_11_03_0f = (nv_ro08(bios, data + 0x03) & 0x0f) >> 0;
		p->ramcfg_11_03_30 = (nv_ro08(bios, data + 0x03) & 0x30) >> 4;
		p->ramcfg_11_03_c0 = (nv_ro08(bios, data + 0x03) & 0xc0) >> 6;
		p->ramcfg_11_03_f0 = (nv_ro08(bios, data + 0x03) & 0xf0) >> 4;
		p->ramcfg_11_04    = (nv_ro08(bios, data + 0x04) & 0xff) >> 0;
		p->ramcfg_11_06    = (nv_ro08(bios, data + 0x06) & 0xff) >> 0;
		p->ramcfg_11_07_02 = (nv_ro08(bios, data + 0x07) & 0x02) >> 1;
		p->ramcfg_11_07_04 = (nv_ro08(bios, data + 0x07) & 0x04) >> 2;
		p->ramcfg_11_07_08 = (nv_ro08(bios, data + 0x07) & 0x08) >> 3;
		p->ramcfg_11_07_10 = (nv_ro08(bios, data + 0x07) & 0x10) >> 4;
		p->ramcfg_11_07_40 = (nv_ro08(bios, data + 0x07) & 0x40) >> 6;
		p->ramcfg_11_07_80 = (nv_ro08(bios, data + 0x07) & 0x80) >> 7;
		p->ramcfg_11_08_01 = (nv_ro08(bios, data + 0x08) & 0x01) >> 0;
		p->ramcfg_11_08_02 = (nv_ro08(bios, data + 0x08) & 0x02) >> 1;
		p->ramcfg_11_08_04 = (nv_ro08(bios, data + 0x08) & 0x04) >> 2;
		p->ramcfg_11_08_08 = (nv_ro08(bios, data + 0x08) & 0x08) >> 3;
		p->ramcfg_11_08_10 = (nv_ro08(bios, data + 0x08) & 0x10) >> 4;
		p->ramcfg_11_08_20 = (nv_ro08(bios, data + 0x08) & 0x20) >> 5;
		p->ramcfg_11_09    = (nv_ro08(bios, data + 0x09) & 0xff) >> 0;
		break;
	default:
		data = 0;
		break;
	}
	return data;
}