| #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 <stdlib.h> |
| #include <string.h> |
| #include <bitops.h> |
| #include <cpu/cpu.h> |
| #include <pc80/keyboard.h> |
| #include "chip.h" |
| #include "northbridge.h" |
| #include "i440bx.h" |
| |
| static void northbridge_init(device_t dev) |
| { |
| printk_spew("Northbridge Init\n"); |
| } |
| |
| 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_INTEL, |
| .device = 0x7190, |
| }; |
| |
| |
| #define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM) |
| |
| static void pci_domain_read_resources(device_t dev) |
| { |
| struct resource *resource; |
| unsigned reg; |
| |
| /* Initialize the system wide io space constraints */ |
| resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| resource->limit = 0xffffUL; |
| resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; |
| |
| /* Initialize the system wide memory resources constraints */ |
| resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| resource->limit = 0xffffffffULL; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; |
| } |
| |
| 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 uint32_t find_pci_tolm(struct bus *bus) |
| { |
| struct resource *min; |
| uint32_t tolm; |
| min = 0; |
| search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min); |
| tolm = 0xffffffffUL; |
| if (min && tolm > min->base) { |
| tolm = min->base; |
| } |
| return tolm; |
| } |
| |
| static void pci_domain_set_resources(device_t dev) |
| { |
| device_t mc_dev; |
| uint32_t pci_tolm; |
| |
| pci_tolm = find_pci_tolm(&dev->link[0]); |
| mc_dev = dev->link[0].children; |
| |
| if (mc_dev) { |
| uint16_t tolm_r; |
| unsigned long tomk, tolmk; |
| int idx; |
| |
| /* Figure out which areas are/should be occupied by RAM. The |
| * value of the highest DRB denotes the end of the physical |
| * memory (in units of 8MB). |
| */ |
| tomk = ((unsigned long)pci_read_config8(mc_dev, DRB7)); |
| |
| /* Convert to KB. */ |
| tomk *= (8 * 1024); |
| |
| printk_debug("Setting RAM size to %d MB\n", tomk / 1024); |
| |
| /* Compute the top of low memory. */ |
| tolmk = pci_tolm / 1024; |
| |
| if (tolmk >= tomk) { |
| /* The PCI hole does does not overlap the memory. */ |
| tolmk = tomk; |
| } |
| |
| /* Report the memory regions. */ |
| idx = 10; |
| ram_resource(dev, idx++, 0, 640); |
| ram_resource(dev, idx++, 768, tolmk - 768); |
| } |
| |
| assign_resources(&dev->link[0]); |
| } |
| |
| static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) |
| { |
| max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max); |
| return max; |
| } |
| |
| 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) |
| { |
| struct device_path path; |
| |
| /* Set the operations if it is a special bus type */ |
| 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_intel_i440bx_ops = { |
| CHIP_NAME("Intel 82443BX (440BX) Northbridge") |
| .enable_dev = enable_dev, |
| }; |