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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <fsp/util.h>
static const uint8_t fsp_tracehub_guid[16] = {
0x09, 0x59, 0xb3, 0x5f, 0x1c, 0x5a, 0x31, 0x4a,
0xad, 0xaf, 0x57, 0x7b, 0x54, 0x68, 0x26, 0x3f,
};
static void tracehub_read_resources(struct device *dev)
{
const struct hob_resource *tracehub_info_hob;
/* Read standard PCI resources. */
pci_dev_read_resources(dev);
/*
* Find the Trace Hub HOB generated by Intel FSP. If the Trace Hub
* is configured to save data in DRAM, FSP will generate this HOB.
* This HOB contains address and length of the memory region used
* by Trace Hub to save traces. Mark this memory region as reserved.
*/
tracehub_info_hob = fsp_find_resource_hob_by_guid(fsp_tracehub_guid);
if (!tracehub_info_hob) {
printk(BIOS_INFO, "Trace Hub HOB not found\n");
return;
}
printk(BIOS_DEBUG, "Trace Hub HOB found: addr=0x%08llx length=0x%08llx\n",
tracehub_info_hob->addr, tracehub_info_hob->length);
reserved_ram_range(dev, 0, tracehub_info_hob->addr,
tracehub_info_hob->length);
}
static struct device_operations dev_ops = {
.read_resources = tracehub_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.ops_pci = &pci_dev_ops_pci,
};
static const unsigned short pci_device_ids[] = {
PCI_DID_INTEL_MTL_TRACEHUB,
0
};
static const struct pci_driver tracehub_driver __pci_driver = {
.ops = &dev_ops,
.vendor = PCI_VID_INTEL,
.devices = pci_device_ids,
};
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