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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
* Copyright (C) 2013-2014 Sage Electronic Engineering, LLC.
*
* 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.
*/
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <cpu/x86/lapic.h>
#include <soc/iomap.h>
#include <soc/iosf.h>
#include <soc/pci_devs.h>
#include <soc/ramstage.h>
#include <cbmem.h>
#include <soc/baytrail.h>
#include <drivers/intel/fsp1_0/fsp_util.h>
#include <arch/acpi.h>
static const int legacy_hole_base_k = 0xa0000 / 1024;
static const int legacy_hole_size_k = 384;
/* Host Memory Map:
*
* +--------------------------+ BMBOUND_HI
* | Usable DRAM |
* +--------------------------+ 4GiB
* | PCI Address Space |
* +--------------------------+ BMBOUND
* | TPM |
* +--------------------------+ IMR2
* | TXE |
* +--------------------------+ IMR1
* | iGD |
* +--------------------------+
* | GTT |
* +--------------------------+ SMMRRH, IRM0
* | TSEG |
* +--------------------------+ SMMRRL
* | FSP |
* +--------------------------+ SMMRRL - 2MB
* | Usable DRAM |
* +--------------------------+ FFFFF
* | ROM Area |
* +--------------------------+ A0000
* | Usable DRAM |
* +--------------------------+ 0
*
* Note that there are really only a few regions that need to enumerated w.r.t.
* coreboot's resource model:
*
* +--------------------------+ BMBOUND_HI
* | Cacheable/Usable |
* +--------------------------+ 4GiB
*
* +--------------------------+ BMBOUND
* | Uncacheable/Reserved |
* +--------------------------+ SMMRRH
* | Cacheable/Reserved |
* +--------------------------+ SMMRRL - 2MB
* | Cacheable/Usable |
* +--------------------------+ 0
*/
/*
* Get the top of low memory for use by ACPI
*/
uint32_t nc_read_top_of_low_memory(void)
{
uint32_t fsp_mem_base = 0;
GetLowMemorySize(&fsp_mem_base);
return fsp_mem_base;
}
static int get_pcie_bar(u32 *base)
{
struct device *dev;
u32 pciexbar_reg;
*base = 0;
dev = pcidev_on_root(0, 0);
if (!dev)
return 0;
pciexbar_reg = iosf_bunit_read(BUNIT_MMCONF_REG);
if (!(pciexbar_reg & (1 << 0)))
return 0;
*base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
(1 << 28));
return 256;
}
static int add_fixed_resources(struct device *dev, int index)
{
struct resource *resource;
resource = new_resource(dev, index++); /* Local APIC */
resource->base = LAPIC_DEFAULT_BASE;
resource->size = 0x00001000;
resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
mmio_resource(dev, index++, legacy_hole_base_k, legacy_hole_size_k);
return index;
}
static void mc_add_dram_resources(struct device *dev)
{
u32 bmbound, bsmmrrl;
int index = 0;
uint64_t highmem_size = 0;
uint32_t fsp_mem_base = 0;
GetHighMemorySize(&highmem_size);
fsp_mem_base=(uint32_t)cbmem_top();
bmbound = iosf_bunit_read(BUNIT_BMBOUND);
bsmmrrl = iosf_bunit_read(BUNIT_SMRRL) << 20;
if (bsmmrrl){
printk(BIOS_DEBUG, "UMA, GTT & SMM memory location: 0x%x\n"
"UMA, GTT & SMM memory size: %dM\n",
bsmmrrl, (bmbound - bsmmrrl) >> 20);
printk(BIOS_DEBUG, "FSP memory location: 0x%x\nFSP memory size: %dM\n",
fsp_mem_base, (bsmmrrl - fsp_mem_base) >> 20);
}
printk(BIOS_INFO, "Available memory below 4GB: 0x%08x (%dM)\n",
fsp_mem_base, fsp_mem_base >> 20);
/* Report the memory regions. */
ram_resource(dev, index++, 0, legacy_hole_base_k);
ram_resource(dev, index++, legacy_hole_base_k + legacy_hole_size_k,
((fsp_mem_base >> 10) - (legacy_hole_base_k + legacy_hole_size_k)));
/* Mark SMM & FSP regions reserved */
mmio_resource(dev, index++, fsp_mem_base >> 10,
(bmbound - fsp_mem_base) >> 10);
if (highmem_size) {
ram_resource(dev, index++, 0x100000000 >> 10, highmem_size >> 10);
}
printk(BIOS_INFO, "Available memory above 4GB: %lluM\n",
highmem_size >> 20);
index = add_fixed_resources(dev, index);
}
static void nc_read_resources(struct device *dev)
{
u32 pcie_config_base;
int buses;
/* Call the normal read_resources */
pci_dev_read_resources(dev);
/* We use 0xcf as an unused index for our PCIe bar so that we find it again */
buses = get_pcie_bar(&pcie_config_base);
if (buses) {
struct resource *resource = new_resource(dev, 0xcf);
mmconf_resource_init(resource, pcie_config_base, buses);
}
/* Calculate and add DRAM resources. */
mc_add_dram_resources(dev);
}
static void nc_enable(struct device *dev)
{
print_fsp_info();
}
static struct device_operations nc_ops = {
.read_resources = nc_read_resources,
.acpi_fill_ssdt_generator = generate_cpu_entries,
.set_resources = DEVICE_NOOP,
.enable_resources = NULL,
.init = NULL,
.enable = &nc_enable,
.scan_bus = NULL,
.ops_pci = &soc_pci_ops,
};
static const struct pci_driver nc_driver __pci_driver = {
.ops = &nc_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = SOC_DEVID,
};
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