| #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 <cpu/cpu.h> |
| #include <cbmem.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "northbridge.h" |
| |
| /* |
| * This fixup is based on capturing values from an Award bios. Without |
| * this fixup the DMA write performance is awful (i.e. hdparm -t /dev/hda is 20x |
| * slower than normal, ethernet drops packets). |
| * Apparently these registers govern some sort of bus master behavior. |
| */ |
| static void northbridge_init(device_t dev) |
| { |
| printk(BIOS_SPEW, "VT8601 random fixup ...\n"); |
| pci_write_config8(dev, 0x70, 0xc0); |
| pci_write_config8(dev, 0x71, 0x88); |
| pci_write_config8(dev, 0x72, 0xec); |
| pci_write_config8(dev, 0x73, 0x0c); |
| pci_write_config8(dev, 0x74, 0x0e); |
| pci_write_config8(dev, 0x75, 0x81); |
| pci_write_config8(dev, 0x76, 0x52); |
| } |
| |
| static struct device_operations northbridge_operations = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = northbridge_init, |
| .enable = 0, |
| .ops_pci = 0, |
| }; |
| |
| static const struct pci_driver northbridge_driver __pci_driver = { |
| .ops = &northbridge_operations, |
| .vendor = PCI_VENDOR_ID_VIA, |
| .device = 0x0601, /* 0x8601 is the AGP bridge? */ |
| }; |
| |
| static void pci_domain_set_resources(device_t dev) |
| { |
| static const uint8_t ramregs[] = { |
| 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x56, 0x57 |
| }; |
| device_t mc_dev; |
| uint32_t pci_tolm; |
| |
| pci_tolm = find_pci_tolm(dev->link_list); |
| mc_dev = dev->link_list->children; |
| if (mc_dev) { |
| unsigned long tomk, tolmk; |
| unsigned char rambits; |
| int i, idx; |
| |
| for(rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) { |
| unsigned char reg; |
| reg = pci_read_config8(mc_dev, ramregs[i]); |
| /* these are ENDING addresses, not sizes. |
| * if there is memory in this slot, then reg will be > rambits. |
| * So we just take the max, that gives us total. |
| * We take the highest one to cover for once and future coreboot |
| * bugs. We warn about bugs. |
| */ |
| if (reg > rambits) |
| rambits = reg; |
| if (reg < rambits) |
| printk(BIOS_ERR, "ERROR! register 0x%x is not set!\n", |
| ramregs[i]); |
| } |
| printk(BIOS_DEBUG, "I would set ram size to 0x%x Kbytes\n", (rambits)*8*1024); |
| tomk = rambits*8*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; |
| } |
| |
| high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE; |
| high_tables_size = HIGH_MEMORY_SIZE; |
| printk(BIOS_DEBUG, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n", |
| tomk*1024, high_tables_base, high_tables_size); |
| |
| /* Report the memory regions */ |
| idx = 10; |
| ram_resource(dev, idx++, 0, tolmk); |
| } |
| assign_resources(dev->link_list); |
| } |
| |
| 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 = pci_domain_scan_bus, |
| }; |
| |
| 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(struct device *dev) |
| { |
| /* Set the operations if it is a special bus type */ |
| if (dev->path.type == DEVICE_PATH_DOMAIN) { |
| dev->ops = &pci_domain_ops; |
| pci_set_method(dev); |
| } |
| else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) { |
| dev->ops = &cpu_bus_ops; |
| } |
| } |
| |
| struct chip_operations northbridge_via_vt8601_ops = { |
| CHIP_NAME("VIA VT8601 Northbridge") |
| .enable_dev = enable_dev, |
| }; |