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#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/hypertransport.h>
#include <stdlib.h>
#include <string.h>
#include <cpu/cpu.h>
#include "chip.h"
#include "northbridge.h"
#include "e7520.h"
static unsigned int max_bus;
#if CONFIG_WRITE_HIGH_TABLES
#include <cbmem.h>
#endif
static void pci_domain_set_resources(device_t dev)
{
device_t mc_dev;
uint32_t pci_tolm;
pci_tolm = find_pci_tolm(dev->link_list);
#if 1
printk(BIOS_DEBUG, "PCI mem marker = %x\n", pci_tolm);
#endif
/* FIXME Me temporary hack */
if(pci_tolm > 0xe0000000)
pci_tolm = 0xe0000000;
/* Ensure pci_tolm is 128M aligned */
pci_tolm &= 0xf8000000;
mc_dev = dev->link_list->children;
if (mc_dev) {
/* Figure out which areas are/should be occupied by RAM.
* This is all computed in kilobytes and converted to/from
* the memory controller right at the edges.
* Having different variables in different units is
* too confusing to get right. Kilobytes are good up to
* 4 Terabytes of RAM...
*/
uint16_t tolm_r, remapbase_r, remaplimit_r, remapoffset_r;
unsigned long tomk, tolmk;
unsigned long remapbasek, remaplimitk, remapoffsetk;
/* Get the Top of Memory address, units are 128M */
tomk = ((unsigned long)pci_read_config16(mc_dev, TOM)) << 17;
/* Compute the Top of Low Memory */
tolmk = (pci_tolm & 0xf8000000) >> 10;
if (tolmk >= tomk) {
/* The PCI hole does not overlap memory
* we won't use the remap window.
*/
tolmk = tomk;
remapbasek = 0x3ff << 16;
remaplimitk = 0 << 16;
remapoffsetk = 0 << 16;
}
else {
/* The PCI memory hole overlaps memory
* setup the remap window.
*/
/* Find the bottom of the remap window
* is it above 4G?
*/
remapbasek = 4*1024*1024;
if (tomk > remapbasek) {
remapbasek = tomk;
}
/* Find the limit of the remap window */
remaplimitk = (remapbasek + (4*1024*1024 - tolmk) - (1 << 16));
/* Find the offset of the remap window from tolm */
remapoffsetk = remapbasek - tolmk;
}
/* Write the ram configruation registers,
* preserving the reserved bits.
*/
tolm_r = pci_read_config16(mc_dev, 0xc4);
tolm_r = ((tolmk >> 17) << 11) | (tolm_r & 0x7ff);
pci_write_config16(mc_dev, 0xc4, tolm_r);
remapbase_r = pci_read_config16(mc_dev, 0xc6);
remapbase_r = (remapbasek >> 16) | (remapbase_r & 0xfc00);
pci_write_config16(mc_dev, 0xc6, remapbase_r);
remaplimit_r = pci_read_config16(mc_dev, 0xc8);
remaplimit_r = (remaplimitk >> 16) | (remaplimit_r & 0xfc00);
pci_write_config16(mc_dev, 0xc8, remaplimit_r);
remapoffset_r = pci_read_config16(mc_dev, 0xca);
remapoffset_r = (remapoffsetk >> 16) | (remapoffset_r & 0xfc00);
pci_write_config16(mc_dev, 0xca, remapoffset_r);
/* Report the memory regions */
ram_resource(dev, 3, 0, 640);
ram_resource(dev, 4, 768, (tolmk - 768));
if (tomk > 4*1024*1024) {
ram_resource(dev, 5, 4096*1024, tomk - 4*1024*1024);
}
if (remaplimitk >= remapbasek) {
ram_resource(dev, 6, remapbasek,
(remaplimitk + 64*1024) - remapbasek);
}
#if CONFIG_WRITE_HIGH_TABLES
/* Leave some space for ACPI, PIRQ and MP tables */
high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
high_tables_size = HIGH_MEMORY_SIZE;
#endif
}
assign_resources(dev->link_list);
}
static u32 e7520_domain_scan_bus(device_t dev, u32 max)
{
max_bus = pci_domain_scan_bus(dev, max);
return max_bus;
}
static struct device_operations pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = pci_domain_set_resources,
.enable_resources = NULL,
.init = NULL,
.scan_bus = e7520_domain_scan_bus,
.ops_pci_bus = &pci_cf8_conf1, /* Do we want to use the memory mapped space here? */
};
static void mc_read_resources(device_t dev)
{
struct resource *resource;
pci_dev_read_resources(dev);
resource = new_resource(dev, 0xcf);
resource->base = 0xe0000000;
resource->size = max_bus * 4096*256;
resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
}
static void mc_set_resources(device_t dev)
{
struct resource *resource;
resource = find_resource(dev, 0xcf);
if (resource) {
report_resource_stored(dev, resource, "<mmconfig>");
}
pci_dev_set_resources(dev);
}
static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
{
pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
((device & 0xffff) << 16) | (vendor & 0xffff));
}
static struct pci_operations intel_pci_ops = {
.set_subsystem = intel_set_subsystem,
};
static struct device_operations mc_ops = {
.read_resources = mc_read_resources,
.set_resources = mc_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = 0,
.scan_bus = 0,
.ops_pci = &intel_pci_ops,
};
static const struct pci_driver mc_driver __pci_driver = {
.ops = &mc_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x3590,
};
static void cpu_bus_init(device_t dev)
{
initialize_cpus(dev->link_list);
}
static void cpu_bus_noop(device_t dev)
{
}
static struct device_operations cpu_bus_ops = {
.read_resources = cpu_bus_noop,
.set_resources = cpu_bus_noop,
.enable_resources = cpu_bus_noop,
.init = cpu_bus_init,
.scan_bus = 0,
};
static void enable_dev(device_t dev)
{
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_DOMAIN) {
dev->ops = &pci_domain_ops;
}
else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
}
struct chip_operations northbridge_intel_e7520_ops = {
CHIP_NAME("Intel E7520 Northbridge")
.enable_dev = enable_dev,
};
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