| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2008 VIA Technologies, Inc. |
| * (Written by Aaron Lwe <aaron.lwe@gmail.com> for VIA) |
| * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #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 "chip.h" |
| #include "northbridge.h" |
| #include "cn700.h" |
| |
| static void memctrl_init(device_t dev) |
| { |
| device_t vlink_dev; |
| u16 reg16; |
| u8 ranks, pagec, paged, pagee, pagef, shadowreg; |
| |
| /* Set up the VGA framebuffer size. */ |
| reg16 = (log2(CONFIG_VIDEO_MB) << 12) | (1 << 15); |
| pci_write_config16(dev, 0xa0, reg16); |
| |
| /* Set up VGA timers. */ |
| pci_write_config8(dev, 0xa2, 0x44); |
| |
| for (ranks = 0x4b; ranks >= 0x48; ranks--) { |
| if (pci_read_config8(dev, ranks)) { |
| ranks -= 0x48; |
| break; |
| } |
| } |
| if (ranks == 0x47) |
| ranks = 0x00; |
| reg16 = 0xaae0; |
| reg16 |= ranks; |
| /* GMINT Misc. FrameBuffer rank */ |
| pci_write_config16(dev, 0xb0, reg16); |
| /* AGPCINT Misc. */ |
| pci_write_config8(dev, 0xb8, 0x08); |
| |
| /* Shadow RAM */ |
| pagec = 0xff, paged = 0xff, pagee = 0xff, pagef = 0x30; |
| /* PAGE C, D, E are all read write enable */ |
| pci_write_config8(dev, 0x80, pagec); |
| pci_write_config8(dev, 0x81, paged); |
| pci_write_config8(dev, 0x82, pagee); |
| /* PAGE F are read/writable */ |
| shadowreg = pci_read_config8(dev, 0x83); |
| shadowreg |= pagef; |
| pci_write_config8(dev, 0x83, shadowreg); |
| /* vlink mirror */ |
| vlink_dev = dev_find_device(PCI_VENDOR_ID_VIA, |
| PCI_DEVICE_ID_VIA_CN700_VLINK, 0); |
| if (vlink_dev) { |
| pci_write_config8(vlink_dev, 0x61, pagec); |
| pci_write_config8(vlink_dev, 0x62, paged); |
| pci_write_config8(vlink_dev, 0x64, pagee); |
| |
| shadowreg = pci_read_config8(vlink_dev, 0x63); |
| shadowreg |= pagef; |
| pci_write_config8(vlink_dev, 0x63, shadowreg); |
| } |
| } |
| |
| static const struct device_operations memctrl_operations = { |
| .read_resources = cn700_noop, |
| .init = memctrl_init, |
| }; |
| |
| static const struct pci_driver memctrl_driver __pci_driver = { |
| .ops = &memctrl_operations, |
| .vendor = PCI_VENDOR_ID_VIA, |
| .device = PCI_DEVICE_ID_VIA_CN700_MEMCTRL, |
| }; |
| |
| static void pci_domain_read_resources(device_t dev) |
| { |
| struct resource *resource; |
| |
| printk_spew("Entering cn700 pci_domain_read_resources.\n"); |
| |
| /* Initialize the system wide I/O 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; |
| |
| printk_spew("Leaving cn700 pci_domain_read_resources.\n"); |
| } |
| |
| 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 u32 find_pci_tolm(struct bus *bus) |
| { |
| struct resource *min; |
| u32 tolm; |
| |
| print_debug("Entering find_pci_tolm\n"); |
| |
| min = 0; |
| search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, |
| tolm_test, &min); |
| tolm = 0xffffffffUL; |
| if (min && tolm > min->base) |
| tolm = min->base; |
| |
| print_debug("Leaving find_pci_tolm\n"); |
| |
| return tolm; |
| } |
| |
| static void pci_domain_set_resources(device_t dev) |
| { |
| /* The order is important to find the correct RAM size. */ |
| static const u8 ramregs[] = { 0x43, 0x42, 0x41, 0x40 }; |
| device_t mc_dev; |
| u32 pci_tolm; |
| |
| printk_spew("Entering cn700 pci_domain_set_resources.\n"); |
| |
| pci_tolm = find_pci_tolm(&dev->link[0]); |
| mc_dev = dev_find_device(PCI_VENDOR_ID_VIA, |
| PCI_DEVICE_ID_VIA_CN700_MEMCTRL, 0); |
| |
| if (mc_dev) { |
| unsigned long tomk, tolmk; |
| unsigned char rambits; |
| int i, idx; |
| |
| /* |
| * Once the register value is not zero, the RAM size is |
| * this register's value multiply 64 * 1024 * 1024. |
| */ |
| for (rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) { |
| rambits = pci_read_config8(mc_dev, ramregs[i]); |
| if (rambits != 0) |
| break; |
| } |
| |
| tomk = rambits * 64 * 1024; |
| printk_spew("tomk is 0x%x\n", tomk); |
| /* Compute the Top Of Low Memory (TOLM), in Kb. */ |
| tolmk = pci_tolm >> 10; |
| if (tolmk >= tomk) { |
| /* The PCI hole does does not overlap the memory. */ |
| tolmk = tomk; |
| } |
| /* Report the memory regions. */ |
| idx = 10; |
| /* TODO: Hole needed? */ |
| ram_resource(dev, idx++, 0, 640); /* First 640k */ |
| /* Leave a hole for VGA, 0xa0000 - 0xc0000 */ |
| ram_resource(dev, idx++, 768, |
| (tolmk - 768 - CONFIG_VIDEO_MB * 1024)); |
| } |
| assign_resources(&dev->link[0]); |
| } |
| |
| static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) |
| { |
| printk_debug("Entering cn700 pci_domain_scan_bus.\n"); |
| |
| max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max); |
| return max; |
| } |
| |
| static const 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 const 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("In cn700 enable_dev for device %s.\n", dev_path(dev)); |
| |
| /* 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_via_cn700_ops = { |
| CHIP_NAME("VIA CN700 Northbridge") |
| .enable_dev = enable_dev, |
| }; |