| #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 <stdlib.h> |
| #include <string.h> |
| #include <bitops.h> |
| #include <cpu/cpu.h> |
| #include "chip.h" |
| #include "northbridge.h" |
| #include "e7525.h" |
| |
| |
| static unsigned int max_bus; |
| |
| static void ram_resource(device_t dev, unsigned long index, |
| unsigned long basek, unsigned long sizek) |
| { |
| struct resource *resource; |
| |
| 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 pci_domain_read_resources(device_t dev) |
| { |
| struct resource *resource; |
| |
| /* Initialize the system wide io space constraints */ |
| resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0)); |
| resource->base = 0; |
| resource->size = 0; |
| resource->align = 0; |
| resource->gran = 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->base = 0; |
| resource->size = 0; |
| resource->align = 0; |
| resource->gran = 0; |
| resource->limit = 0xffffffffUL; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | 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]); |
| |
| #if 1 |
| printk_debug("PCI mem marker = %x\n", pci_tolm); |
| #endif |
| /* FIXME Me temporary hack */ |
| if(pci_tolm > 0xe0000000) |
| pci_tolm = 0xe0000000; |
| /* Ensure pci_tolm is 128M aligned */ |
| pci_tolm &= 0xf8000000; |
| mc_dev = dev->link[0].children; |
| if (mc_dev) { |
| /* Figure out which areas are/should be occupied by RAM. |
| * This is all computed in kilobytes and converted to/from |
| * the memory controller right at the edges. |
| * Having different variables in different units is |
| * too confusing to get right. Kilobytes are good up to |
| * 4 Terabytes of RAM... |
| */ |
| uint16_t tolm_r, remapbase_r, remaplimit_r, remapoffset_r; |
| unsigned long tomk, tolmk; |
| unsigned long remapbasek, remaplimitk, remapoffsetk; |
| |
| /* Get the Top of Memory address, units are 128M */ |
| tomk = ((unsigned long)pci_read_config16(mc_dev, TOM)) << 17; |
| /* Compute the Top of Low Memory */ |
| tolmk = (pci_tolm & 0xf8000000) >> 10; |
| |
| if (tolmk >= tomk) { |
| /* The PCI hole does not overlap memory |
| * we won't use the remap window. |
| */ |
| tolmk = tomk; |
| remapbasek = 0x3ff << 16; |
| remaplimitk = 0 << 16; |
| remapoffsetk = 0 << 16; |
| } |
| else { |
| /* The PCI memory hole overlaps memory |
| * setup the remap window. |
| */ |
| /* Find the bottom of the remap window |
| * is it above 4G? |
| */ |
| remapbasek = 4*1024*1024; |
| if (tomk > remapbasek) { |
| remapbasek = tomk; |
| } |
| /* Find the limit of the remap window */ |
| remaplimitk = (remapbasek + (4*1024*1024 - tolmk) - (1 << 16)); |
| /* Find the offset of the remap window from tolm */ |
| remapoffsetk = remapbasek - tolmk; |
| } |
| /* Write the ram configruation registers, |
| * preserving the reserved bits. |
| */ |
| tolm_r = pci_read_config16(mc_dev, 0xc4); |
| tolm_r = ((tolmk >> 17) << 11) | (tolm_r & 0x7ff); |
| pci_write_config16(mc_dev, 0xc4, tolm_r); |
| |
| remapbase_r = pci_read_config16(mc_dev, 0xc6); |
| remapbase_r = (remapbasek >> 16) | (remapbase_r & 0xfc00); |
| pci_write_config16(mc_dev, 0xc6, remapbase_r); |
| |
| remaplimit_r = pci_read_config16(mc_dev, 0xc8); |
| remaplimit_r = (remaplimitk >> 16) | (remaplimit_r & 0xfc00); |
| pci_write_config16(mc_dev, 0xc8, remaplimit_r); |
| |
| remapoffset_r = pci_read_config16(mc_dev, 0xca); |
| remapoffset_r = (remapoffsetk >> 16) | (remapoffset_r & 0xfc00); |
| pci_write_config16(mc_dev, 0xca, remapoffset_r); |
| |
| /* Report the memory regions */ |
| ram_resource(dev, 3, 0, 640); |
| ram_resource(dev, 4, 768, tolmk - 768); |
| if (tomk > 4*1024*1024) { |
| ram_resource(dev, 5, 4096*1024, tomk - 4*1024*1024); |
| } |
| if (remaplimitk >= remapbasek) { |
| ram_resource(dev, 6, remapbasek, |
| (remaplimitk + 64*1024) - remapbasek); |
| } |
| } |
| 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], 0, 0xff, max); |
| if (max > max_bus) { |
| max_bus = 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, |
| .ops_pci_bus = &pci_cf8_conf1, /* Do we want to use the memory mapped space here? */ |
| }; |
| |
| static void mc_read_resources(device_t dev) |
| { |
| struct resource *resource; |
| |
| pci_dev_read_resources(dev); |
| |
| resource = new_resource(dev, 0xcf); |
| resource->base = 0xe0000000; |
| resource->size = max_bus * 4096*256; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; |
| } |
| |
| static void mc_set_resources(device_t dev) |
| { |
| struct resource *resource, *last; |
| |
| last = &dev->resource[dev->resources]; |
| resource = find_resource(dev, 0xcf); |
| if (resource) { |
| report_resource_stored(dev, resource, "<mmconfig>"); |
| } |
| pci_dev_set_resources(dev); |
| } |
| |
| static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device) |
| { |
| pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
| ((device & 0xffff) << 16) | (vendor & 0xffff)); |
| } |
| |
| static struct pci_operations intel_pci_ops = { |
| .set_subsystem = intel_set_subsystem, |
| }; |
| |
| static struct device_operations mc_ops = { |
| .read_resources = mc_read_resources, |
| .set_resources = mc_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = 0, |
| .scan_bus = 0, |
| .ops_pci = &intel_pci_ops, |
| }; |
| |
| static const struct pci_driver mc_driver __pci_driver = { |
| .ops = &mc_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x359e, |
| }; |
| |
| 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(device_t dev) |
| { |
| /* Set the operations if it is a special bus type */ |
| if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { |
| dev->ops = &pci_domain_ops; |
| } |
| else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { |
| dev->ops = &cpu_bus_ops; |
| } |
| } |
| |
| struct chip_operations northbridge_intel_e7525_ops = { |
| CHIP_NAME("Intel E7525 Northbridge") |
| .enable_dev = enable_dev, |
| }; |