/*
 * 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/sb900/sb900.h>
#include "chip.h"

#define ONE_MB  0x100000
//#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 torpedo board.
*************************************************/
static void torpedo_enable(device_t dev)
{
  printk(BIOS_INFO, "Mainboard Torpedo 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 Family12h BKDG. */
  /* Please reference MemNGetUmaSizeLN () */
  /*
   *     Total system memory   UMASize
   *     >= 2G                 512M
   *     >=1G                  256M
   *     <1G                    64M
   */
  sys_mem = msr.lo;
  sys_mem = msr.lo + 16 * ONE_MB;   // Ignore 16MB allocated for C6 when finding UMA size
  if (sys_mem >= 2048 * ONE_MB) {
    uma_memory_size = 512 * ONE_MB;
  } else if (sys_mem >= 1024 * ONE_MB) {
    uma_memory_size = 256 * ONE_MB;
  } else {
    uma_memory_size = 64 * ONE_MB;
  }
  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 TORPEDO Mainboard")
  .enable_dev = torpedo_enable,
};