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/*
* This file is part of the LinuxBIOS project.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*
* Turn off machine check triggers when reading
* pci space where there are no devices.
* This is necessary when scaning the bus for
* devices which is done by the kernel
*
* written in 2003 by Eric Biederman
*
* - Athlon64 workarounds by Stefan Reinauer
* - "reset once" logic by Yinghai Lu
* Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS)
* Written by Morgan Tsai <my_tsai@sis.com> for SiS.
*
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <part/hard_reset.h>
#include <pc80/mc146818rtc.h>
#include <bitops.h>
#include <cpu/amd/model_fxx_rev.h>
//#include "amdk8.h"
#include <arch/io.h>
/**
* @brief Read resources for AGP aperture
*
* @param
*
* There is only one AGP aperture resource needed. The resoruce is added to
* the northbridge of BSP.
*
* The same trick can be used to augment legacy VGA resources which can
* be detect by generic pci reousrce allocator for VGA devices.
* BAD: it is more tricky than I think, the resource allocation code is
* implemented in a way to NOT DOING legacy VGA resource allcation on
* purpose :-(.
*/
typedef struct msr_struct
{
unsigned lo;
unsigned hi;
} msr_t;
static inline msr_t rdmsr(unsigned index)
{
msr_t result;
result.lo = 0;
result.hi = 0;
return result;
}
static void sis761_read_resources(device_t dev)
{
struct resource *resource;
unsigned char iommu;
/* Read the generic PCI resources */
printk_debug("sis761_read_resources\n");
pci_dev_read_resources(dev);
/* If we are not the first processor don't allocate the gart apeture */
if (dev->path.u.pci.devfn != PCI_DEVFN(0x0, 0)) {
return;
}
return;
iommu = 1;
get_option(&iommu, "iommu");
if (iommu) {
/* Add a Gart apeture resource */
resource = new_resource(dev, 0x94);
resource->size = iommu?AGP_APERTURE_SIZE:1;
resource->align = log2(resource->size);
resource->gran = log2(resource->size);
resource->limit = 0xffffffff; /* 4G */
resource->flags = IORESOURCE_MEM;
}
}
static void set_agp_aperture(device_t dev)
{
struct resource *resource;
return;
resource = probe_resource(dev, 0x94);
if (resource) {
device_t pdev;
uint32_t gart_base, gart_acr;
/* Remember this resource has been stored */
resource->flags |= IORESOURCE_STORED;
/* Find the size of the GART aperture */
gart_acr = (0<<6)|(0<<5)|(0<<4)|((resource->gran - 25) << 1)|(0<<0);
/* Get the base address */
gart_base = ((resource->base) >> 25) & 0x00007fff;
/* Update the other northbriges */
pdev = 0;
while((pdev = dev_find_device(PCI_VENDOR_ID_AMD, 0x1103, pdev))) {
/* Store the GART size but don't enable it */
pci_write_config32(pdev, 0x90, gart_acr);
/* Store the GART base address */
pci_write_config32(pdev, 0x94, gart_base);
/* Don't set the GART Table base address */
pci_write_config32(pdev, 0x98, 0);
/* Report the resource has been stored... */
report_resource_stored(pdev, resource, " <gart>");
}
}
}
static void sis761_set_resources(device_t dev)
{
printk_debug("sis761_set_resources ------->\n");
/* Set the gart apeture */
// set_agp_aperture(dev);
/* Set the generic PCI resources */
pci_dev_set_resources(dev);
printk_debug("sis761_set_resources <-------\n");
}
static void sis761_init(struct device *dev)
{
uint32_t cmd, cmd_ref;
int needs_reset;
struct device *f0_dev, *f2_dev;
msr_t msr;
needs_reset = 0;
printk_debug("sis761_init: ---------->\n");
msr = rdmsr(0xC001001A);
pci_write_config16(dev, 0x8E, msr.lo >> 16); // Topbound
pci_write_config8(dev, 0x7F, 0x08); // ACPI Base
outb(inb(0x856) | 0x40, 0x856); // Auto-Reset Function
printk_debug("sis761_init: <----------\n");
printk_debug("done.\n");
}
static struct device_operations sis761_ops = {
.read_resources = sis761_read_resources,
.set_resources = sis761_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = sis761_init,
.scan_bus = 0,
.ops_pci = 0,
};
static const struct pci_driver sis761_driver __pci_driver = {
.ops = &sis761_ops,
.vendor = PCI_VENDOR_ID_SIS,
.device = PCI_DEVICE_ID_SIS_SIS761,
};
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