From 77ff0b1a01d3d640be55d301b2fcf09a3f840ffe Mon Sep 17 00:00:00 2001 From: Lee Leahy Date: Tue, 5 May 2015 15:07:29 -0700 Subject: Braswell: Use Baytrail as Comparison Base Add baytrail source for comparison with Braswell. BRANCH=none BUG=None TEST=None Change-Id: I5170addf41676d95a3daf070a32bcee085f8156d Signed-off-by: Lee Leahy Reviewed-on: http://review.coreboot.org/10117 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/soc/intel/braswell/northcluster.c | 148 ++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 src/soc/intel/braswell/northcluster.c (limited to 'src/soc/intel/braswell/northcluster.c') diff --git a/src/soc/intel/braswell/northcluster.c b/src/soc/intel/braswell/northcluster.c new file mode 100644 index 0000000000..97b3bccba0 --- /dev/null +++ b/src/soc/intel/braswell/northcluster.c @@ -0,0 +1,148 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * 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; version 2 of the License. + * + * 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 +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +/* Host Memory Map: + * + * +--------------------------+ BMBOUND_HI + * | Usable DRAM | + * +--------------------------+ 4GiB + * | PCI Address Space | + * +--------------------------+ BMBOUND + * | TPM | + * +--------------------------+ IMR2 + * | TXE | + * +--------------------------+ IMR1 + * | iGD | + * +--------------------------+ + * | GTT | + * +--------------------------+ SMMRRH, IRM0 + * | TSEG | + * +--------------------------+ SMMRRL + * | Usable DRAM | + * +--------------------------+ 0 + * + * Note that there are really only a few regions that need to enumerated w.r.t. + * coreboot's resource model: + * + * +--------------------------+ BMBOUND_HI + * | Cacheable/Usable | + * +--------------------------+ 4GiB + * + * +--------------------------+ BMBOUND + * | Uncacheable/Reserved | + * +--------------------------+ SMMRRH + * | Cacheable/Reserved | + * +--------------------------+ SMMRRL + * | Cacheable/Usable | + * +--------------------------+ 0 + */ +#define RES_IN_KiB(r) ((r) >> 10) + +uint32_t nc_read_top_of_low_memory(void) +{ + return iosf_bunit_read(BUNIT_BMBOUND) & ~((1 << 27) - 1); +} + +static void nc_read_resources(device_t dev) +{ + unsigned long mmconf; + unsigned long bmbound; + unsigned long bmbound_hi; + unsigned long smmrrh; + unsigned long smmrrl; + unsigned long base_k, size_k; + const unsigned long four_gig_kib = (4 << (30 - 10)); + int index = 0; + + /* Read standard PCI resources. */ + pci_dev_read_resources(dev); + + /* PCIe memory-mapped config space access - 256 MiB. */ + mmconf = iosf_bunit_read(BUNIT_MMCONF_REG) & ~((1 << 28) - 1); + mmio_resource(dev, BUNIT_MMCONF_REG, RES_IN_KiB(mmconf), 256 * 1024); + + /* 0 -> 0xa0000 */ + base_k = RES_IN_KiB(0); + size_k = RES_IN_KiB(0xa0000) - base_k; + ram_resource(dev, index++, base_k, size_k); + + /* The SMMRR registers are 1MiB granularity with smmrrh being + * inclusive of the SMM region. */ + smmrrl = (iosf_bunit_read(BUNIT_SMRRL) & 0xffff) << 10; + smmrrh = ((iosf_bunit_read(BUNIT_SMRRH) & 0xffff) + 1) << 10; + + /* 0xc0000 -> smrrl - cacheable and usable */ + base_k = RES_IN_KiB(0xc0000); + size_k = smmrrl - base_k; + ram_resource(dev, index++, base_k, size_k); + + if (smmrrh > smmrrl) + reserved_ram_resource(dev, index++, smmrrl, smmrrh - smmrrl); + + /* All address space between bmbound and smmrrh is unusable. */ + bmbound = RES_IN_KiB(nc_read_top_of_low_memory()); + mmio_resource(dev, index++, smmrrh, bmbound - smmrrh); + + /* The BMBOUND_HI register matches register bits of 31:24 with address + * bits of 35:28. Therefore, shift register to align properly. */ + bmbound_hi = iosf_bunit_read(BUNIT_BMBOUND_HI) & ~((1 << 24) - 1); + bmbound_hi = RES_IN_KiB(bmbound_hi) << 4; + if (bmbound_hi > four_gig_kib) + ram_resource(dev, index++, four_gig_kib, + bmbound_hi - four_gig_kib); + + /* Reserve everything between A segment and 1MB: + * + * 0xa0000 - 0xbffff: legacy VGA + * 0xc0000 - 0xfffff: RAM + */ + mmio_resource(dev, index++, (0xa0000 >> 10), (0xc0000 - 0xa0000) >> 10); + reserved_ram_resource(dev, index++, (0xc0000 >> 10), + (0x100000 - 0xc0000) >> 10); + + chromeos_reserve_ram_oops(dev, index++); +} + +static struct device_operations nc_ops = { + .read_resources = nc_read_resources, + .set_resources = NULL, + .enable_resources = NULL, + .init = NULL, + .enable = NULL, + .scan_bus = NULL, + .ops_pci = &soc_pci_ops, +}; + +static const struct pci_driver nc_driver __pci_driver = { + .ops = &nc_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = SOC_DEVID, +}; -- cgit v1.2.3