summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/soc/amd/picasso/Makefile.inc1
-rw-r--r--src/soc/amd/picasso/root_complex.c95
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,
+};