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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <arch/io.h>
#include <boot/tables.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/mtrr.h>
#include <device/pci_def.h>
//#include <southbridge/amd/sb800/sb800.h>
#include "chip.h"
//#define SMBUS_IO_BASE 0x6000
/**
* TODO
* SB CIMx callback
*/
void set_pcie_reset(void)
{
}
/**
* TODO
* mainboard specific SB CIMx callback
*/
void set_pcie_dereset(void)
{
}
uint64_t uma_memory_base, uma_memory_size;
/*************************************************
* enable the dedicated function in persimmon board.
*************************************************/
static void persimmon_enable(device_t dev)
{
printk(BIOS_INFO, "Mainboard Persimmon Enable. dev=0x%p\n", dev);
#if (CONFIG_GFXUMA == 1)
msr_t msr, msr2;
uint32_t sys_mem;
/* TOP_MEM: the top of DRAM below 4G */
msr = rdmsr(TOP_MEM);
printk
(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
__func__, msr.lo, msr.hi);
/* TOP_MEM2: the top of DRAM above 4G */
msr2 = rdmsr(TOP_MEM2);
printk
(BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
__func__, msr2.lo, msr2.hi);
/* refer to UMA Size Consideration in Family14h BKDG. */
sys_mem = msr.lo + 0x1000000; // Ignore 16MB allocated for C6 when finding UMA size, refer MemNGetUmaSizeON()
if ((msr.hi & 0x0000000F) || (sys_mem >= 0x80000000)) {
uma_memory_size = 0x18000000; /* >= 2G memory, 384M recommended UMA */
}
else {
if (sys_mem >= 0x40000000) {
uma_memory_size = 0x10000000; /* >= 1G memory, 256M recommended UMA */
}
else {
uma_memory_size = 0x4000000; /* <1G memory, 64M recommended UMA */
}
}
uma_memory_base = msr.lo - uma_memory_size; /* TOP_MEM1 */
printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
__func__, uma_memory_size, uma_memory_base);
/* TODO: TOP_MEM2 */
#else
uma_memory_size = 0x10000000; /* 256M recommended UMA */
uma_memory_base = 0x30000000; /* 1GB system memory supported */
#endif
}
int add_mainboard_resources(struct lb_memory *mem)
{
/* UMA is removed from system memory in the northbridge code, but
* in some circumstances we want the memory mentioned as reserved.
*/
#if (CONFIG_GFXUMA == 1)
printk(BIOS_INFO, "uma_memory_start=0x%llx, uma_memory_size=0x%llx \n",
uma_memory_base, uma_memory_size);
lb_add_memory_range(mem, LB_MEM_RESERVED, uma_memory_base,
uma_memory_size);
#endif
return 0;
}
struct chip_operations mainboard_ops = {
CHIP_NAME("AMD PERSIMMON Mainboard")
.enable_dev = persimmon_enable,
};
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