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https://github.com/fail0verflow/switch-coreboot.git
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f8030bd924
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2649 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/*
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* This file is part of the LinuxBIOS project.
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*
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* Copyright (C) 2007 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 <arch/io.h>
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#include <stdint.h>
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#include <cpu/amd/vr.h>
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#include <console/console.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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void graphics_init(void)
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{
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uint16_t wClassIndex, wData, res;
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/* SoftVG initialization */
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printk_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/../Options.lb
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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 (value in 7:0 looks like /2)
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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 | (CONFIG_VIDEO_MB & VG_MEM_MASK);
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vrWrite(wClassIndex, wData);
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res = vrRead(wClassIndex);
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printk_debug("VRC_VG value: 0x%04x\n", res);
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}
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