| #include <console/console.h> |
| #include <arch/io.h> |
| #include <stdint.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <cpu/cpu.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <bitops.h> |
| #include "chip.h" |
| |
| 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; |
| } |
| |
| #if CONFIG_WRITE_HIGH_TABLES==1 |
| #define HIGH_TABLES_SIZE 64 // maximum size of high tables in KB |
| extern uint64_t high_tables_base, high_tables_size; |
| #endif |
| |
| static void pci_domain_set_resources(device_t dev) |
| { |
| 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) { |
| /* 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; |
| unsigned long tomk, tolmk; |
| unsigned long remapbasek, remaplimitk; |
| int idx; |
| |
| /* Get the value of the highest DRB. This tells the end of |
| * the physical memory. The units are ticks of 64MB |
| * i.e. 1 means 64MB. |
| */ |
| tomk = ((unsigned long)pci_read_config8(mc_dev, 0x67)) << 16; |
| /* Compute the top of Low memory */ |
| tolmk = pci_tolm >> 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; |
| } |
| 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)); |
| } |
| /* Write the ram configuration 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); |
| |
| /* Report the memory regions */ |
| idx = 10; |
| ram_resource(dev, idx++, 0, 640); |
| ram_resource(dev, idx++, 768, tolmk - 768); |
| if (tomk > 4*1024*1024) { |
| ram_resource(dev, idx++, 4096*1024, tomk - 4*1024*1024); |
| } |
| if (remaplimitk >= remapbasek) { |
| ram_resource(dev, idx++, remapbasek, |
| (remaplimitk + 64*1024) - remapbasek); |
| } |
| |
| #if CONFIG_WRITE_HIGH_TABLES==1 |
| /* Leave some space for ACPI, PIRQ and MP tables */ |
| high_tables_base = (tolmk - HIGH_TABLES_SIZE) * 1024; |
| high_tables_size = HIGH_TABLES_SIZE * 1024; |
| #endif |
| } |
| 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, |
| .ops_pci_bus = &pci_cf8_conf1, |
| }; |
| |
| 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_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_e7501_ops = { |
| CHIP_NAME("Intel E7501 Northbridge") |
| .enable_dev = enable_dev, |
| }; |