Stefan Reinauer | b15975b | 2011-10-21 12:57:59 -0700 | [diff] [blame] | 1 | #include <console/console.h> |
| 2 | #include <arch/io.h> |
| 3 | #include <stdint.h> |
| 4 | #include <device/device.h> |
| 5 | #include <device/pci.h> |
| 6 | #include <cpu/cpu.h> |
| 7 | #include <stdlib.h> |
| 8 | #include <string.h> |
| 9 | #include <bitops.h> |
| 10 | #include "chip.h" |
| 11 | |
| 12 | #if CONFIG_WRITE_HIGH_TABLES==1 |
| 13 | #include <cbmem.h> |
| 14 | #endif |
| 15 | |
| 16 | static void pci_domain_set_resources(device_t dev) |
| 17 | { |
| 18 | device_t mc_dev; |
| 19 | uint32_t pci_tolm; |
| 20 | |
| 21 | pci_tolm = find_pci_tolm(dev->link_list); |
| 22 | mc_dev = dev->link_list->children; |
| 23 | if (mc_dev) { |
| 24 | /* Figure out which areas are/should be occupied by RAM. |
| 25 | * This is all computed in kilobytes and converted to/from |
| 26 | * the memory controller right at the edges. |
| 27 | * Having different variables in different units is |
| 28 | * too confusing to get right. Kilobytes are good up to |
| 29 | * 4 Terabytes of RAM... |
| 30 | */ |
| 31 | uint16_t tolm_r, remapbase_r, remaplimit_r; |
| 32 | unsigned long tomk, tolmk; |
| 33 | unsigned long remapbasek, remaplimitk; |
| 34 | int idx; |
| 35 | |
| 36 | /* Get the value of the highest DRB. This tells the end of |
| 37 | * the physical memory. The units are ticks of 64MB |
| 38 | * i.e. 1 means 64MB. |
| 39 | */ |
| 40 | tomk = ((unsigned long)pci_read_config8(mc_dev, 0x67)) << 16; |
| 41 | /* Compute the top of Low memory */ |
| 42 | tolmk = pci_tolm >> 10; |
| 43 | if (tolmk >= tomk) { |
| 44 | /* The PCI hole does not overlap memory |
| 45 | * we won't use the remap window. |
| 46 | */ |
| 47 | tolmk = tomk; |
| 48 | remapbasek = 0x3ff << 16; |
| 49 | remaplimitk = 0 << 16; |
| 50 | } |
| 51 | else { |
| 52 | /* The PCI memory hole overlaps memory |
| 53 | * setup the remap window. |
| 54 | */ |
| 55 | /* Find the bottom of the remap window |
| 56 | * is it above 4G? |
| 57 | */ |
| 58 | remapbasek = 4*1024*1024; |
| 59 | if (tomk > remapbasek) { |
| 60 | remapbasek = tomk; |
| 61 | } |
| 62 | /* Find the limit of the remap window */ |
| 63 | remaplimitk = (remapbasek + (4*1024*1024 - tolmk) - (1 << 16)); |
| 64 | } |
| 65 | /* Write the ram configuration registers, |
| 66 | * preserving the reserved bits. |
| 67 | */ |
| 68 | tolm_r = pci_read_config16(mc_dev, 0xc4); |
| 69 | tolm_r = ((tolmk >> 17) << 11) | (tolm_r & 0x7ff); |
| 70 | pci_write_config16(mc_dev, 0xc4, tolm_r); |
| 71 | |
| 72 | remapbase_r = pci_read_config16(mc_dev, 0xc6); |
| 73 | remapbase_r = (remapbasek >> 16) | (remapbase_r & 0xfc00); |
| 74 | pci_write_config16(mc_dev, 0xc6, remapbase_r); |
| 75 | |
| 76 | remaplimit_r = pci_read_config16(mc_dev, 0xc8); |
| 77 | remaplimit_r = (remaplimitk >> 16) | (remaplimit_r & 0xfc00); |
| 78 | pci_write_config16(mc_dev, 0xc8, remaplimit_r); |
| 79 | |
| 80 | /* Report the memory regions */ |
| 81 | idx = 10; |
| 82 | ram_resource(dev, idx++, 0, 640); |
| 83 | ram_resource(dev, idx++, 768, tolmk - 768); |
| 84 | if (tomk > 4*1024*1024) { |
| 85 | ram_resource(dev, idx++, 4096*1024, tomk - 4*1024*1024); |
| 86 | } |
| 87 | if (remaplimitk >= remapbasek) { |
| 88 | ram_resource(dev, idx++, remapbasek, |
| 89 | (remaplimitk + 64*1024) - remapbasek); |
| 90 | } |
| 91 | |
| 92 | #if CONFIG_WRITE_HIGH_TABLES==1 |
| 93 | /* Leave some space for ACPI, PIRQ and MP tables */ |
| 94 | high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE; |
| 95 | high_tables_size = HIGH_MEMORY_SIZE; |
| 96 | #endif |
| 97 | } |
| 98 | assign_resources(dev->link_list); |
| 99 | } |
| 100 | |
| 101 | static struct device_operations pci_domain_ops = { |
| 102 | .read_resources = pci_domain_read_resources, |
| 103 | .set_resources = pci_domain_set_resources, |
| 104 | .enable_resources = NULL, |
| 105 | .init = NULL, |
| 106 | .scan_bus = pci_domain_scan_bus, |
| 107 | .ops_pci_bus = &pci_cf8_conf1, |
| 108 | }; |
| 109 | |
| 110 | static void cpu_bus_init(device_t dev) |
| 111 | { |
| 112 | initialize_cpus(dev->link_list); |
| 113 | } |
| 114 | |
| 115 | static void cpu_bus_noop(device_t dev) |
| 116 | { |
| 117 | } |
| 118 | |
| 119 | static struct device_operations cpu_bus_ops = { |
| 120 | .read_resources = cpu_bus_noop, |
| 121 | .set_resources = cpu_bus_noop, |
| 122 | .enable_resources = cpu_bus_noop, |
| 123 | .init = cpu_bus_init, |
| 124 | .scan_bus = 0, |
| 125 | }; |
| 126 | |
| 127 | static void enable_dev(struct device *dev) |
| 128 | { |
| 129 | /* Set the operations if it is a special bus type */ |
| 130 | if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { |
| 131 | dev->ops = &pci_domain_ops; |
| 132 | } |
| 133 | else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { |
| 134 | dev->ops = &cpu_bus_ops; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | struct chip_operations northbridge_intel_e7501_ops = { |
| 139 | CHIP_NAME("Intel E7501 Northbridge") |
| 140 | .enable_dev = enable_dev, |
| 141 | }; |