| #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 "chip.h" |
| #include "northbridge.h" |
| #include <cpu/amd/gx1def.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/cpu.h> |
| |
| #define NORTHBRIDGE_FILE "northbridge.c" |
| /* |
| */ |
| |
| static void optimize_xbus(device_t dev) |
| { |
| /* Optimise X-Bus performance */ |
| pci_write_config8(dev, 0x40, 0x1e); |
| pci_write_config8(dev, 0x41, 0x52); |
| pci_write_config8(dev, 0x43, 0xc1); |
| pci_write_config8(dev, 0x44, 0x00); |
| } |
| |
| /** |
| * Enables memory from 0xC0000 up to 0xFFFFF. |
| * So this region is read/write and cache able |
| * |
| * FIXME: What about PCI master access into |
| * this region? |
| **/ |
| |
| static void enable_shadow(device_t dev) |
| { |
| writel(0x77777777,GX_BASE+BC_XMAP_2); |
| writel(0x77777777,GX_BASE+BC_XMAP_3); |
| } |
| |
| static void northbridge_init(device_t dev) |
| { |
| printk_debug("northbridge: %s()\n", __func__); |
| |
| optimize_xbus(dev); |
| enable_shadow(dev); |
| printk_spew("Calling enable_cache()\n"); |
| enable_cache(); |
| } |
| |
| |
| 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_CYRIX, |
| .device = PCI_DEVICE_ID_CYRIX_PCI_MASTER, |
| }; |
| |
| |
| |
| #define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM) |
| |
| static void pci_domain_read_resources(device_t dev) |
| { |
| struct resource *resource; |
| |
| printk_spew("%s:%s()\n", NORTHBRIDGE_FILE, __func__); |
| |
| /* 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) { |
| unsigned int tomk, tolmk; |
| unsigned int ramreg = 0; |
| int i, idx; |
| unsigned int *bcdramtop = (unsigned int *)(GX_BASE + BC_DRAM_TOP); |
| unsigned int *mcgbaseadd = (unsigned int *)(GX_BASE + MC_GBASE_ADD); |
| |
| for(i=0; i<0x20; i+= 0x10) { |
| unsigned int *mcreg = (unsigned int *)(GX_BASE + MC_BANK_CFG); |
| unsigned int mem_config = *mcreg; |
| |
| if (((mem_config & (DIMM_PG_SZ << i)) >> (4 + i)) == 7) |
| continue; |
| ramreg += 1 << (((mem_config & (DIMM_SZ << i)) >> (i + 8)) + 2); |
| } |
| |
| tomk = ramreg << 10; |
| |
| /* Sort out the framebuffer size */ |
| tomk -= CONFIG_VIDEO_MB * 1024; |
| *bcdramtop = ((tomk << 10) - 1); |
| *mcgbaseadd = (tomk >> 9); |
| |
| printk_debug("BC_DRAM_TOP = 0x%08x\n", *bcdramtop); |
| printk_debug("MC_GBASE_ADD = 0x%08x\n", *mcgbaseadd); |
| |
| printk_debug("I would set ram size to %d Mbytes\n", (tomk >> 10)); |
| |
| /* Compute the top of Low memory */ |
| tolmk = pci_tolm >> 10; |
| 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, tolmk); |
| } |
| 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) |
| { |
| printk_spew("%s:%s()\n", NORTHBRIDGE_FILE, __func__); |
| 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) |
| { |
| printk_spew("%s:%s()\n", NORTHBRIDGE_FILE, __func__); |
| /* Set the operations if it is a special bus type */ |
| if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { |
| printk_spew("DEVICE_PATH_PCI_DOMAIN\n"); |
| dev->ops = &pci_domain_ops; |
| pci_set_method(dev); |
| } |
| else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { |
| printk_spew("DEVICE_PATH_APIC_CLUSTER\n"); |
| dev->ops = &cpu_bus_ops; |
| } else { |
| printk_spew("device path type %d\n",dev->path.type); |
| } |
| } |
| |
| struct chip_operations northbridge_amd_gx1_ops = { |
| CHIP_NAME("AMD GX1 Northbridge") |
| .enable_dev = enable_dev, |
| }; |