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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2009 coresystems GmbH
*
* 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 <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/hypertransport.h>
#include <device/pci_ids.h>
#include <stdlib.h>
#include <string.h>
#include <bitops.h>
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include "chip.h"
#include "northbridge.h"
static void ram_resource(device_t dev, unsigned long index,
unsigned long basek, unsigned long sizek)
{
struct resource *resource;
if (!sizek) {
return;
}
resource = new_resource(dev, index);
resource->base = ((resource_t) basek) << 10;
resource->size = ((resource_t) sizek) << 10;
resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE |
IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
}
static void tolm_test(void *gp, struct device *dev, struct resource *new)
{
struct resource **best_p = gp;
struct resource *best;
best = *best_p;
if (!best || (best->base > new->base)) {
best = new;
}
*best_p = best;
}
static u32 find_pci_tolm(struct bus *bus)
{
struct resource *min = NULL;
u32 tolm;
search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
tolm = 0xffffffffUL;
if (min && tolm > min->base) {
tolm = min->base;
}
return tolm;
}
#if CONFIG_HAVE_HIGH_TABLES==1
/* maximum size of high tables in KB */
#define HIGH_TABLES_SIZE 64
extern uint64_t high_tables_base, high_tables_size;
#endif
static void pci_domain_set_resources(device_t dev)
{
device_t mc_dev;
u32 pci_tolm;
unsigned char reg;
unsigned long tomk, tolmk;
unsigned char rambits;
int idx;
pci_tolm = find_pci_tolm(&dev->link[0]);
mc_dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3324, 0);
rambits = pci_read_config8(mc_dev, 0x88);
rambits >>= 2;
/* Get memory size and frame buffer from northbridge's registers.
*
* If register contains an invalid value we set frame buffer size to a
* default of 32M, but that probably won't happen.
*/
reg = pci_read_config8(mc_dev, 0xa1);
reg &= 0x70;
reg = reg >> 4;
/* TOP 1M SMM Memory */
if (reg == 0x0 || reg == 0x6 || reg == 0x7)
tomk = (((rambits << 6) - 32 - 1) * 1024); // Set frame buffer 32M for default
else
tomk = (((rambits << 6) - (4 << reg) - 1) * 1024);
/* Compute the top of Low memory */
tolmk = pci_tolm >> 10;
if (tolmk >= tomk) {
/* The PCI hole does does not overlap the memory. */
tolmk = tomk;
tolmk -= 1024; // TOP 1M SM Memory
}
#if CONFIG_HAVE_HIGH_TABLES == 1
high_tables_base = (tolmk - HIGH_TABLES_SIZE) * 1024;
high_tables_size = HIGH_TABLES_SIZE* 1024;
printk_debug("tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n", tomk*1024, high_tables_base, high_tables_size);
#endif
/* Report the memory regions */
idx = 10;
/* TODO: Hole needed? Should this go elsewhere? */
ram_resource(dev, idx++, 0, 640); /* first 640k */
ram_resource(dev, idx++, 768, (tolmk - 768)); /* leave a hole for vga */
assign_resources(&dev->link[0]);
}
static struct device_operations pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = pci_domain_set_resources,
.enable_resources = enable_childrens_resources,
.init = 0,
.scan_bus = pci_domain_scan_bus,
};
static void cpu_bus_init(device_t dev)
{
initialize_cpus(&dev->link[0]);
}
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(struct device *dev)
{
/* Our wonderful device model */
if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
dev->ops = &pci_domain_ops;
pci_set_method(dev);
} else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
}
struct chip_operations northbridge_via_cx700_ops = {
CHIP_NAME("VIA CX700 Northbridge")
.enable_dev = enable_dev
};
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