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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/ioapic.h>
#include <amdblocks/data_fabric.h>
#include <amdblocks/root_complex.h>
#include <amdblocks/smn.h>
#include <arch/ioapic.h>
#include <console/console.h>
#include <device/device.h>
#include <types.h>
#include <vendorcode/amd/opensil/genoa_poc/opensil.h>
#define IOHC_IOAPIC_BASE_ADDR_LO 0x2f0
static void genoa_domain_read_resources(struct device *domain)
{
amd_pci_domain_read_resources(domain);
// We only want to add the DRAM memory map once
if (domain->downstream->secondary == 0 && domain->downstream->segment_group == 0) {
/* 0x1000 is a large enough first index to be sure to not overlap with the
resources added by amd_pci_domain_read_resources */
add_opensil_memmap(domain, 0x1000);
}
}
static void genoa_domain_set_resources(struct device *domain)
{
if (domain->downstream->bridge_ctrl & PCI_BRIDGE_CTL_VGA) {
printk(BIOS_DEBUG, "Setting VGA decoding for domain 0x%x\n",
domain->path.domain.domain);
const union df_vga_en vga_en = {
.ve = 1,
.dst_fabric_id = get_iohc_fabric_id(domain),
};
data_fabric_broadcast_write32(DF_VGA_EN, vga_en.raw);
}
pci_domain_set_resources(domain);
/* Enable IOAPIC memory decoding */
struct resource *res = probe_resource(domain, IOMMU_IOAPIC_IDX);
if (res) {
const uint32_t iohc_misc_base = get_iohc_misc_smn_base(domain);
uint32_t ioapic_base = smn_read32(iohc_misc_base | IOHC_IOAPIC_BASE_ADDR_LO);
ioapic_base |= (1 << 0);
smn_write32(iohc_misc_base | IOHC_IOAPIC_BASE_ADDR_LO, ioapic_base);
}
}
static void genoa_domain_init(struct device *domain)
{
struct resource *res = probe_resource(domain, IOMMU_IOAPIC_IDX);
if (!res)
return;
register_new_ioapic((void *)(uintptr_t)res->base);
}
static const char *genoa_domain_acpi_name(const struct device *domain)
{
const char *domain_acpi_names[4] = {
"S0B0",
"S0B1",
"S0B2",
"S0B3",
};
if (domain->path.domain.domain < ARRAY_SIZE(domain_acpi_names))
return domain_acpi_names[domain->path.domain.domain];
return NULL;
}
struct device_operations genoa_pci_domain_ops = {
.read_resources = genoa_domain_read_resources,
.set_resources = genoa_domain_set_resources,
.scan_bus = amd_pci_domain_scan_bus,
.init = genoa_domain_init,
.acpi_name = genoa_domain_acpi_name,
.acpi_fill_ssdt = amd_pci_domain_fill_ssdt,
};
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