| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2009 coresystems GmbH |
| * Copyright (C) 2014 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 <console/console.h> |
| #include <arch/acpi.h> |
| #include <arch/io.h> |
| #include <stdint.h> |
| #include <delay.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <cbmem.h> |
| #include <vendorcode/google/chromeos/chromeos.h> |
| #include <soc/cpu.h> |
| #include <soc/iomap.h> |
| #include <soc/pci_devs.h> |
| #include <soc/ramstage.h> |
| #include <soc/systemagent.h> |
| |
| u8 systemagent_revision(void) |
| { |
| return pci_read_config8(SA_DEV_ROOT, PCI_REVISION_ID); |
| } |
| |
| static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len) |
| { |
| u32 pciexbar_reg; |
| |
| *base = 0; |
| *len = 0; |
| |
| pciexbar_reg = pci_read_config32(dev, index); |
| |
| if (!(pciexbar_reg & (1 << 0))) |
| return 0; |
| |
| switch ((pciexbar_reg >> 1) & 3) { |
| case 0: // 256MB |
| *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)| |
| (1 << 28)); |
| *len = 256 * 1024 * 1024; |
| return 1; |
| case 1: // 128M |
| *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)| |
| (1 << 28)|(1 << 27)); |
| *len = 128 * 1024 * 1024; |
| return 1; |
| case 2: // 64M |
| *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)| |
| (1 << 28)|(1 << 27)|(1 << 26)); |
| *len = 64 * 1024 * 1024; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int get_bar(device_t dev, unsigned int index, u32 *base, u32 *len) |
| { |
| u32 bar; |
| |
| bar = pci_read_config32(dev, index); |
| |
| /* If not enabled don't report it. */ |
| if (!(bar & 0x1)) |
| return 0; |
| |
| /* Knock down the enable bit. */ |
| *base = bar & ~1; |
| |
| return 1; |
| } |
| |
| /* There are special BARs that actually are programmed in the MCHBAR. These |
| * Intel special features, but they do consume resources that need to be |
| * accounted for. */ |
| static int get_bar_in_mchbar(device_t dev, unsigned int index, u32 *base, |
| u32 *len) |
| { |
| u32 bar; |
| |
| bar = MCHBAR32(index); |
| |
| /* If not enabled don't report it. */ |
| if (!(bar & 0x1)) |
| return 0; |
| |
| /* Knock down the enable bit. */ |
| *base = bar & ~1; |
| |
| return 1; |
| } |
| |
| struct fixed_mmio_descriptor { |
| unsigned int index; |
| u32 size; |
| int (*get_resource)(device_t dev, unsigned int index, |
| u32 *base, u32 *size); |
| const char *description; |
| }; |
| |
| struct fixed_mmio_descriptor mc_fixed_resources[] = { |
| { PCIEXBAR, 0, get_pcie_bar, "PCIEXBAR" }, |
| { MCHBAR, MCH_BASE_SIZE, get_bar, "MCHBAR" }, |
| { DMIBAR, DMI_BASE_SIZE, get_bar, "DMIBAR" }, |
| { EPBAR, EP_BASE_SIZE, get_bar, "EPBAR" }, |
| { GDXCBAR, GDXC_BASE_SIZE, get_bar_in_mchbar, "GDXCBAR" }, |
| { EDRAMBAR, EDRAM_BASE_SIZE, get_bar_in_mchbar, "EDRAMBAR" }, |
| }; |
| |
| /* |
| * Add all known fixed MMIO ranges that hang off the host bridge/memory |
| * controller device. |
| */ |
| static void mc_add_fixed_mmio_resources(device_t dev) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mc_fixed_resources); i++) { |
| u32 base; |
| u32 size; |
| struct resource *resource; |
| unsigned int index; |
| |
| size = mc_fixed_resources[i].size; |
| index = mc_fixed_resources[i].index; |
| if (!mc_fixed_resources[i].get_resource(dev, index, |
| &base, &size)) |
| continue; |
| |
| resource = new_resource(dev, mc_fixed_resources[i].index); |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | |
| IORESOURCE_STORED | IORESOURCE_RESERVE | |
| IORESOURCE_ASSIGNED; |
| resource->base = base; |
| resource->size = size; |
| printk(BIOS_DEBUG, "%s: Adding %s @ %x 0x%08lx-0x%08lx.\n", |
| __func__, mc_fixed_resources[i].description, index, |
| (unsigned long)base, (unsigned long)(base + size - 1)); |
| } |
| } |
| |
| /* Host Memory Map: |
| * |
| * +--------------------------+ TOUUD |
| * | | |
| * +--------------------------+ 4GiB |
| * | PCI Address Space | |
| * +--------------------------+ TOLUD (also maps into MC address space) |
| * | iGD | |
| * +--------------------------+ BDSM |
| * | GTT | |
| * +--------------------------+ BGSM |
| * | TSEG | |
| * +--------------------------+ TSEGMB |
| * | Usage DRAM | |
| * +--------------------------+ 0 |
| * |
| * Some of the base registers above can be equal making the size of those |
| * regions 0. The reason is because the memory controller internally subtracts |
| * the base registers from each other to determine sizes of the regions. In |
| * other words, the memory map is in a fixed order no matter what. |
| */ |
| |
| struct map_entry { |
| int reg; |
| int is_64_bit; |
| int is_limit; |
| const char *description; |
| }; |
| |
| static void read_map_entry(device_t dev, struct map_entry *entry, |
| uint64_t *result) |
| { |
| uint64_t value; |
| uint64_t mask; |
| |
| /* All registers are on a 1MiB granularity. */ |
| mask = ((1ULL<<20)-1); |
| mask = ~mask; |
| |
| value = 0; |
| |
| if (entry->is_64_bit) { |
| value = pci_read_config32(dev, entry->reg + 4); |
| value <<= 32; |
| } |
| |
| value |= pci_read_config32(dev, entry->reg); |
| value &= mask; |
| |
| if (entry->is_limit) |
| value |= ~mask; |
| |
| *result = value; |
| } |
| |
| #define MAP_ENTRY(reg_, is_64_, is_limit_, desc_) \ |
| { \ |
| .reg = reg_, \ |
| .is_64_bit = is_64_, \ |
| .is_limit = is_limit_, \ |
| .description = desc_, \ |
| } |
| |
| #define MAP_ENTRY_BASE_64(reg_, desc_) \ |
| MAP_ENTRY(reg_, 1, 0, desc_) |
| #define MAP_ENTRY_LIMIT_64(reg_, desc_) \ |
| MAP_ENTRY(reg_, 1, 1, desc_) |
| #define MAP_ENTRY_BASE_32(reg_, desc_) \ |
| MAP_ENTRY(reg_, 0, 0, desc_) |
| |
| enum { |
| TOM_REG, |
| TOUUD_REG, |
| MESEG_BASE_REG, |
| MESEG_LIMIT_REG, |
| REMAP_BASE_REG, |
| REMAP_LIMIT_REG, |
| TOLUD_REG, |
| BGSM_REG, |
| BDSM_REG, |
| TSEG_REG, |
| // Must be last. |
| NUM_MAP_ENTRIES |
| }; |
| |
| static struct map_entry memory_map[NUM_MAP_ENTRIES] = { |
| [TOM_REG] = MAP_ENTRY_BASE_64(TOM, "TOM"), |
| [TOUUD_REG] = MAP_ENTRY_BASE_64(TOUUD, "TOUUD"), |
| [MESEG_BASE_REG] = MAP_ENTRY_BASE_64(MESEG_BASE, "MESEG_BASE"), |
| [MESEG_LIMIT_REG] = MAP_ENTRY_LIMIT_64(MESEG_LIMIT, "MESEG_LIMIT"), |
| [REMAP_BASE_REG] = MAP_ENTRY_BASE_64(REMAPBASE, "REMAP_BASE"), |
| [REMAP_LIMIT_REG] = MAP_ENTRY_LIMIT_64(REMAPLIMIT, "REMAP_LIMIT"), |
| [TOLUD_REG] = MAP_ENTRY_BASE_32(TOLUD, "TOLUD"), |
| [BDSM_REG] = MAP_ENTRY_BASE_32(BDSM, "BDSM"), |
| [BGSM_REG] = MAP_ENTRY_BASE_32(BGSM, "BGSM"), |
| [TSEG_REG] = MAP_ENTRY_BASE_32(TSEG, "TESGMB"), |
| }; |
| |
| static void mc_read_map_entries(device_t dev, uint64_t *values) |
| { |
| int i; |
| for (i = 0; i < NUM_MAP_ENTRIES; i++) { |
| read_map_entry(dev, &memory_map[i], &values[i]); |
| } |
| } |
| |
| static void mc_report_map_entries(device_t dev, uint64_t *values) |
| { |
| int i; |
| for (i = 0; i < NUM_MAP_ENTRIES; i++) { |
| printk(BIOS_DEBUG, "MC MAP: %s: 0x%llx\n", |
| memory_map[i].description, values[i]); |
| } |
| /* One can validate the BDSM and BGSM against the GGC. */ |
| printk(BIOS_DEBUG, "MC MAP: GGC: 0x%x\n", pci_read_config16(dev, GGC)); |
| } |
| |
| static void mc_add_dram_resources(device_t dev) |
| { |
| unsigned long base_k, size_k; |
| unsigned long touud_k; |
| unsigned long index; |
| struct resource *resource; |
| uint64_t mc_values[NUM_MAP_ENTRIES]; |
| unsigned long dpr_size = 0; |
| u32 dpr_reg; |
| |
| /* Read in the MAP registers and report their values. */ |
| mc_read_map_entries(dev, &mc_values[0]); |
| mc_report_map_entries(dev, &mc_values[0]); |
| |
| /* |
| * DMA Protected Range can be reserved below TSEG for PCODE patch |
| * or TXT/BootGuard related data. Rather than report a base address |
| * the DPR register reports the TOP of the region, which is the same |
| * as TSEG base. The region size is reported in MiB in bits 11:4. |
| */ |
| dpr_reg = pci_read_config32(SA_DEV_ROOT, DPR); |
| if (dpr_reg & DPR_EPM) { |
| dpr_size = (dpr_reg & DPR_SIZE_MASK) << 16; |
| printk(BIOS_INFO, "DPR SIZE: 0x%lx\n", dpr_size); |
| } |
| |
| /* |
| * These are the host memory ranges that should be added: |
| * - 0 -> 0xa0000: cacheable |
| * - 0xc0000 -> TSEG : cacheable |
| * - TESG -> BGSM: cacheable with standard MTRRs and reserved |
| * - BGSM -> TOLUD: not cacheable with standard MTRRs and reserved |
| * - 4GiB -> TOUUD: cacheable |
| * |
| * The default SMRAM space is reserved so that the range doesn't |
| * have to be saved during S3 Resume. Once marked reserved the OS |
| * cannot use the memory. This is a bit of an odd place to reserve |
| * the region, but the CPU devices don't have dev_ops->read_resources() |
| * called on them. |
| * |
| * The range 0xa0000 -> 0xc0000 does not have any resources |
| * associated with it to handle legacy VGA memory. If this range |
| * is not omitted the mtrr code will setup the area as cacheable |
| * causing VGA access to not work. |
| * |
| * The TSEG region is mapped as cacheable so that one can perform |
| * SMRAM relocation faster. Once the SMRR is enabled the SMRR takes |
| * precedence over the existing MTRRs covering this region. |
| * |
| * It should be noted that cacheable entry types need to be added in |
| * order. The reason is that the current MTRR code assumes this and |
| * falls over itself if it isn't. |
| * |
| * The resource index starts low and should not meet or exceed |
| * PCI_BASE_ADDRESS_0. |
| */ |
| index = 0; |
| |
| /* 0 - > 0xa0000 */ |
| base_k = 0; |
| size_k = (0xa0000 >> 10) - base_k; |
| ram_resource(dev, index++, base_k, size_k); |
| |
| /* 0xc0000 -> TSEG - DPR */ |
| base_k = 0xc0000 >> 10; |
| size_k = (unsigned long)(mc_values[TSEG_REG] >> 10) - base_k; |
| size_k -= dpr_size >> 10; |
| ram_resource(dev, index++, base_k, size_k); |
| |
| /* TSEG - DPR -> BGSM */ |
| resource = new_resource(dev, index++); |
| resource->base = mc_values[TSEG_REG] - dpr_size; |
| resource->size = mc_values[BGSM_REG] - resource->base; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | |
| IORESOURCE_STORED | IORESOURCE_RESERVE | |
| IORESOURCE_ASSIGNED | IORESOURCE_CACHEABLE; |
| |
| /* BGSM -> TOLUD */ |
| resource = new_resource(dev, index++); |
| resource->base = mc_values[BGSM_REG]; |
| resource->size = mc_values[TOLUD_REG] - resource->base; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | |
| IORESOURCE_STORED | IORESOURCE_RESERVE | |
| IORESOURCE_ASSIGNED; |
| |
| /* 4GiB -> TOUUD */ |
| base_k = 4096 * 1024; /* 4GiB */ |
| touud_k = mc_values[TOUUD_REG] >> 10; |
| size_k = touud_k - base_k; |
| if (touud_k > base_k) |
| ram_resource(dev, index++, base_k, size_k); |
| |
| /* 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 void systemagent_read_resources(device_t dev) |
| { |
| /* Read standard PCI resources. */ |
| pci_dev_read_resources(dev); |
| |
| /* Add all fixed MMIO resources. */ |
| mc_add_fixed_mmio_resources(dev); |
| |
| /* Calculate and add DRAM resources. */ |
| mc_add_dram_resources(dev); |
| } |
| |
| static void systemagent_init(struct device *dev) |
| { |
| u8 bios_reset_cpl, pair; |
| |
| /* Enable Power Aware Interrupt Routing */ |
| pair = MCHBAR8(MCH_PAIR); |
| pair &= ~0x7; /* Clear 2:0 */ |
| pair |= 0x4; /* Fixed Priority */ |
| MCHBAR8(MCH_PAIR) = pair; |
| |
| /* |
| * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU |
| * that BIOS has initialized memory and power management |
| */ |
| bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL); |
| bios_reset_cpl |= 3; |
| MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl; |
| printk(BIOS_DEBUG, "Set BIOS_RESET_CPL\n"); |
| |
| /* Configure turbo power limits 1ms after reset complete bit */ |
| mdelay(1); |
| set_power_limits(28); |
| } |
| |
| unsigned long acpi_fill_slit(unsigned long current) |
| { |
| // Not implemented |
| return current; |
| } |
| |
| unsigned long acpi_fill_srat(unsigned long current) |
| { |
| /* No NUMA, no SRAT */ |
| return current; |
| } |
| |
| static struct device_operations systemagent_ops = { |
| .read_resources = &systemagent_read_resources, |
| .acpi_fill_ssdt_generator = &generate_cpu_entries, |
| .set_resources = &pci_dev_set_resources, |
| .enable_resources = &pci_dev_enable_resources, |
| .init = &systemagent_init, |
| .ops_pci = &broadwell_pci_ops, |
| }; |
| |
| static const unsigned short systemagent_ids[] = { |
| 0x0a04, /* Haswell ULT */ |
| 0x1604, /* Broadwell-U/Y */ |
| 0x1610, /* Broadwell-H Desktop */ |
| 0x1614, /* Broadwell-H Mobile */ |
| 0 |
| }; |
| |
| static const struct pci_driver systemagent_driver __pci_driver = { |
| .ops = &systemagent_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = systemagent_ids |
| }; |