2 * This file is part of the LinuxBIOS project.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 * Turn off machine check triggers when reading
19 * pci space where there are no devices.
20 * This is necessary when scaning the bus for
21 * devices which is done by the kernel
23 * written in 2003 by Eric Biederman
25 * - Athlon64 workarounds by Stefan Reinauer
26 * - "reset once" logic by Yinghai Lu
27 * Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS)
28 * Written by Morgan Tsai <my_tsai@sis.com> for SiS.
32 #include <console/console.h>
33 #include <device/device.h>
34 #include <device/pci.h>
35 #include <device/pci_ids.h>
36 #include <device/pci_ops.h>
37 #include <part/hard_reset.h>
38 #include <pc80/mc146818rtc.h>
40 #include <cpu/amd/model_fxx_rev.h>
47 * @brief Read resources for AGP aperture
51 * There is only one AGP aperture resource needed. The resoruce is added to
52 * the northbridge of BSP.
54 * The same trick can be used to augment legacy VGA resources which can
55 * be detect by generic pci reousrce allocator for VGA devices.
56 * BAD: it is more tricky than I think, the resource allocation code is
57 * implemented in a way to NOT DOING legacy VGA resource allcation on
62 typedef struct msr_struct
68 static inline msr_t rdmsr(unsigned index)
78 static void sis761_read_resources(device_t dev)
80 struct resource *resource;
82 /* Read the generic PCI resources */
83 printk_debug("sis761_read_resources\n");
84 pci_dev_read_resources(dev);
86 /* If we are not the first processor don't allocate the gart apeture */
87 if (dev->path.u.pci.devfn != PCI_DEVFN(0x0, 0)) {
95 get_option(&iommu, "iommu");
98 /* Add a Gart apeture resource */
99 resource = new_resource(dev, 0x94);
100 resource->size = iommu?AGP_APERTURE_SIZE:1;
101 resource->align = log2(resource->size);
102 resource->gran = log2(resource->size);
103 resource->limit = 0xffffffff; /* 4G */
104 resource->flags = IORESOURCE_MEM;
108 static void set_agp_aperture(device_t dev)
110 struct resource *resource;
114 resource = probe_resource(dev, 0x94);
117 uint32_t gart_base, gart_acr;
119 /* Remember this resource has been stored */
120 resource->flags |= IORESOURCE_STORED;
122 /* Find the size of the GART aperture */
123 gart_acr = (0<<6)|(0<<5)|(0<<4)|((resource->gran - 25) << 1)|(0<<0);
125 /* Get the base address */
126 gart_base = ((resource->base) >> 25) & 0x00007fff;
128 /* Update the other northbriges */
130 while((pdev = dev_find_device(PCI_VENDOR_ID_AMD, 0x1103, pdev))) {
131 /* Store the GART size but don't enable it */
132 pci_write_config32(pdev, 0x90, gart_acr);
134 /* Store the GART base address */
135 pci_write_config32(pdev, 0x94, gart_base);
137 /* Don't set the GART Table base address */
138 pci_write_config32(pdev, 0x98, 0);
140 /* Report the resource has been stored... */
141 report_resource_stored(pdev, resource, " <gart>");
146 static void sis761_set_resources(device_t dev)
148 printk_debug("sis761_set_resources ------->\n");
149 /* Set the gart apeture */
150 // set_agp_aperture(dev);
152 /* Set the generic PCI resources */
153 pci_dev_set_resources(dev);
154 printk_debug("sis761_set_resources <-------\n");
157 static void sis761_init(struct device *dev)
159 uint32_t cmd, cmd_ref;
161 struct device *f0_dev, *f2_dev;
166 printk_debug("sis761_init: ---------->\n");
168 msr = rdmsr(0xC001001A);
169 pci_write_config16(dev, 0x8E, msr.lo >> 16); // Topbound
170 pci_write_config8(dev, 0x7F, 0x08); // ACPI Base
171 outb(inb(0x856) | 0x40, 0x856); // Auto-Reset Function
173 printk_debug("sis761_init: <----------\n");
174 printk_debug("done.\n");
178 static struct device_operations sis761_ops = {
179 .read_resources = sis761_read_resources,
180 .set_resources = sis761_set_resources,
181 .enable_resources = pci_dev_enable_resources,
187 static const struct pci_driver sis761_driver __pci_driver = {
189 .vendor = PCI_VENDOR_ID_SIS,
190 .device = PCI_DEVICE_ID_SIS_SIS761,