diff options
Diffstat (limited to 'src/southbridge/sis/sis966/sis761.c')
| -rw-r--r-- | src/southbridge/sis/sis966/sis761.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/southbridge/sis/sis966/sis761.c b/src/southbridge/sis/sis966/sis761.c new file mode 100644 index 0000000000..e622d9f7cf --- /dev/null +++ b/src/southbridge/sis/sis966/sis761.c @@ -0,0 +1,191 @@ +/* + * 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, +}; |