diff options
| -rw-r--r-- | src/soc/amd/picasso/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/amd/picasso/root_complex.c | 95 |
2 files changed, 96 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/Makefile.inc b/src/soc/amd/picasso/Makefile.inc index ef2b6b199e..ed94cfb63a 100644 --- a/src/soc/amd/picasso/Makefile.inc +++ b/src/soc/amd/picasso/Makefile.inc @@ -44,6 +44,7 @@ ramstage-y += i2c.c ramstage-y += chip.c ramstage-y += cpu.c ramstage-y += data_fabric_util.c +ramstage-y += root_complex.c ramstage-y += mca.c ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c ramstage-y += gpio.c diff --git a/src/soc/amd/picasso/root_complex.c b/src/soc/amd/picasso/root_complex.c new file mode 100644 index 0000000000..f621eeaf31 --- /dev/null +++ b/src/soc/amd/picasso/root_complex.c @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <acpi/acpigen.h> +#include <cbmem.h> +#include <console/console.h> +#include <cpu/amd/msr.h> +#include <cpu/amd/mtrr.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <fsp/util.h> +#include <stdint.h> + +static void read_resources(struct device *dev) +{ + uint32_t mem_usable = (uintptr_t)cbmem_top(); + unsigned int idx = 0; + const struct hob_header *hob = fsp_get_hob_list(); + const struct hob_resource *res; + + /* 0x0 - 0x9ffff */ + ram_resource(dev, idx++, 0, 0xa0000 / KiB); + + /* 0xa0000 - 0xbffff: legacy VGA */ + mmio_resource(dev, idx++, 0xa0000 / KiB, 0x20000 / KiB); + + /* 0xc0000 - 0xfffff: Option ROM */ + reserved_ram_resource(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB); + + /* 1MB to top of low usable RAM */ + ram_resource(dev, idx++, 1 * MiB / KiB, (mem_usable - 1 * MiB) / KiB); + + mmconf_resource(dev, MMIO_CONF_BASE); + + if (!hob) { + printk(BIOS_ERR, "Error: %s incomplete because no HOB list was found\n", + __func__); + return; + } + + for (; hob->type != HOB_TYPE_END_OF_HOB_LIST; hob = fsp_next_hob(hob)) { + + if (hob->type != HOB_TYPE_RESOURCE_DESCRIPTOR) + continue; + + res = fsp_hob_header_to_resource(hob); + + if (res->type == EFI_RESOURCE_SYSTEM_MEMORY && res->addr < mem_usable) + continue; /* 0 through low usable was set above */ + if (res->type == EFI_RESOURCE_MEMORY_MAPPED_IO) + continue; /* Done separately */ + + if (res->type == EFI_RESOURCE_SYSTEM_MEMORY) + ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); + else if (res->type == EFI_RESOURCE_MEMORY_RESERVED) + reserved_ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); + else + printk(BIOS_ERR, "Error: failed to set resources for type %d\n", + res->type); + } +} + +/* Used by \_SB.PCI0._CRS */ +static void root_complex_fill_ssdt(const struct device *device) +{ + msr_t msr; + + acpigen_write_scope(acpi_device_scope(device)); + + msr = rdmsr(TOP_MEM); + acpigen_write_name_dword("TOM1", msr.lo); + msr = rdmsr(TOP_MEM2); + /* + * Since XP only implements parts of ACPI 2.0, we can't use a qword + * here. + * See http://www.acpi.info/presentations/S01USMOBS169_OS%2520new.ppt + * slide 22ff. + * Shift value right by 20 bit to make it fit into 32bit, + * giving us 1MB granularity and a limit of almost 4Exabyte of memory. + */ + acpigen_write_name_dword("TOM2", (msr.hi << 12) | msr.lo >> 20); + acpigen_pop_len(); +} + +static struct device_operations root_complex_operations = { + .read_resources = read_resources, + .enable_resources = pci_dev_enable_resources, + .acpi_fill_ssdt = root_complex_fill_ssdt, +}; + +static const struct pci_driver family17_root_complex __pci_driver = { + .ops = &root_complex_operations, + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_17H_MODEL_101F_NB, +}; |