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aa49b41989
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://coreboot.org/repository/coreboot-v3@642 f3766cd6-281f-0410-b1cd-43a5c92072e9
63 lines
2 KiB
C
63 lines
2 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <io.h>
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#include <amd_geodelx.h>
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#include <console.h>
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#include <statictree.h>
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/**
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* This function mirrors the Graphics_Init routine in GeodeROM.
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*
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* @param video_mb Size of the video RAM in 2 MB chunks.
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*/
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void graphics_init(u8 video_mb)
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{
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u16 wClassIndex, wData, res;
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/* SoftVG initialization */
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printk(BIOS_DEBUG, "Graphics init...\n");
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/* Call SoftVG with the main configuration parameters. */
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/* NOTE: SoftVG expects the memory size to be given in 2MB blocks. */
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wClassIndex = (VRC_VG << 8) + VG_CONFIG;
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/*
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* Graphics Driver Enabled (13) 0, NO (lets BIOS controls the GP)
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* External Monochrome Card Support(12) 0, NO
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* Controller Priority Select(11) 1, Primary
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* Display Select(10:8) 0x0, CRT
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* Graphics Memory Size(7:1) CONFIG_VIDEO_MB >> 1,
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* defined in mainboard/../dts
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* PLL Reference Clock Bypass(0) 0, Default
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*/
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/* Video RAM has to be given in 2MB chunks.
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* The value is read @ 7:1 (looks like video_mb & ~1)
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* so we can add the real value in megabytes.
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*/
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wData = VG_CFG_DRIVER | VG_CFG_PRIORITY |
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VG_CFG_DSCRT | (video_mb & VG_MEM_MASK);
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vr_write(wClassIndex, wData);
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res = vr_read(wClassIndex);
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printk(BIOS_DEBUG, "VRC_VG value: 0x%04x\n", res);
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}
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