1. 根目录:
2. drivers
3. gpu
4. drm
5. nouveau
6. core
7. subdev
8. devinit
9. nv20.c

/*
 * Copyright (C) 2010 Francisco Jerez.
 * All Rights Reserved.
 *
 * 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 (including the
 * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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.
 *
 */

#include "nv04.h"
#include "fbmem.h"

static void
nv20_devinit_meminit(struct nouveau_devinit *devinit)
{
	struct nv04_devinit_priv *priv = (void *)devinit;
	struct nouveau_device *device = nv_device(priv);
	uint32_t mask = (device->chipset >= 0x25 ? 0x300 : 0x900);
	uint32_t amount, off;
	struct io_mapping *fb;

	/* Map the framebuffer aperture */
	fb = fbmem_init(nv_device(priv)->pdev);
	if (!fb) {
		nv_error(priv, "failed to map fb\n");
		return;
	}

	nv_wr32(priv, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);

	/* Allow full addressing */
	nv_mask(priv, NV04_PFB_CFG0, 0, mask);

	amount = nv_rd32(priv, 0x10020c);
	for (off = amount; off > 0x2000000; off -= 0x2000000)
		fbmem_poke(fb, off - 4, off);

	amount = nv_rd32(priv, 0x10020c);
	if (amount != fbmem_peek(fb, amount - 4))
		/* IC missing - disable the upper half memory space. */
		nv_mask(priv, NV04_PFB_CFG0, mask, 0);

	fbmem_fini(fb);
}

struct nouveau_oclass *
nv20_devinit_oclass = &(struct nouveau_devinit_impl) {
	.base.handle = NV_SUBDEV(DEVINIT, 0x20),
	.base.ofuncs = &(struct nouveau_ofuncs) {
		.ctor = nv04_devinit_ctor,
		.dtor = nv04_devinit_dtor,
		.init = nv04_devinit_init,
		.fini = nv04_devinit_fini,
	},
	.meminit = nv20_devinit_meminit,
	.pll_set = nv04_devinit_pll_set,
}.base;