diff options
author | Stefan Reinauer <reinauer@chromium.org> | 2011-10-21 12:57:59 -0700 |
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committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2011-10-28 22:01:03 +0200 |
commit | b15975bf5a4a1b9ed4d83e2c8caf622d71a7e4d5 (patch) | |
tree | 91e645b98fdfc145236b1d1f027b61e6895aff6b /src/northbridge/intel/e7505/northbridge.c | |
parent | 94a458626a9f12aa670926d633f445bebc1fb63c (diff) |
copy e7501 component to e7505
Change-Id: Ie69a6b6a040a8b0e7693083b3a2d13c327a165b3
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/310
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'src/northbridge/intel/e7505/northbridge.c')
-rw-r--r-- | src/northbridge/intel/e7505/northbridge.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/northbridge/intel/e7505/northbridge.c b/src/northbridge/intel/e7505/northbridge.c new file mode 100644 index 0000000000..e6e955fb4f --- /dev/null +++ b/src/northbridge/intel/e7505/northbridge.c @@ -0,0 +1,141 @@ +#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" + +#if CONFIG_WRITE_HIGH_TABLES==1 +#include <cbmem.h> +#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 * 1024) - HIGH_MEMORY_SIZE; + high_tables_size = HIGH_MEMORY_SIZE; +#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, +}; |