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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
* Copyright (C) 2012 Nils Jacobs
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <stdint.h>
#include <cpu/amd/vr.h>
#include <console/console.h>
#include <cpu/amd/gx2def.h>
#include <cpu/x86/msr.h>
#include <stdlib.h>
void geodegx2_vga_msr_init(void);
void graphics_init(void);
struct msrinit {
u32 msrnum;
msr_t msr;
};
static const struct msrinit geodegx2_vga_msr[] = {
/* Enable the GLIU Memory routing to the memory A0000-BFFFF
* PDID1 : Port 4, GLIU0
* PBASE : 0x000A0
* PMASK : 0xFFFE0
*/
{.msrnum = GLIU0_P2D_BM_4, {.lo = 0x0a0fffe0, .hi = 0x80000000}},
};
void geodegx2_vga_msr_init(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(geodegx2_vga_msr); i++)
wrmsr(geodegx2_vga_msr[i].msrnum, geodegx2_vga_msr[i].msr);
}
/* This function mirrors the Graphics_Init routine in GeodeROM. */
void graphics_init(void)
{
uint16_t wClassIndex, wData, res;
/* SoftVG initialization */
printk(BIOS_DEBUG, "Graphics init...\n");
geodegx2_vga_msr_init();
/* Call SoftVG with the main configuration parameters. */
/* NOTE: SoftVG expects the memory size to be given in 512 KB blocks */
wClassIndex = (VRC_VG << 8) + VG_CONFIG;
/*
* Graphics Driver Enabled (13) 0, NO (lets BIOS controls the GP)
* External Monochrome Card Support(12) 0, NO
* Controller Priority Select(11) 1, Primary
* Display Select(10:8) 0x0, CRT
* Graphics Memory Size(7:1) CONFIG_VIDEO_MB >> 1,
* defined in devicetree.cb
* PLL Reference Clock Bypass(0) 0, Default
*/
/* Video RAM has to be given in 512KB chunks
* the value is read @ 7:1 (value in 7:0 looks like /2)
* so we can add the real value in megabytes
*/
wData = VG_CFG_PRIORITY | VG_CFG_DSCRT | ((CONFIG_VIDEO_MB * 2) & VG_MEM_MASK);
vrWrite(wClassIndex, wData);
res = vrRead(wClassIndex);
printk(BIOS_DEBUG, "VRC_VG value: 0x%04x\n", res);
}
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