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soc/intel/tigerlake: Move PMC PCI resources under PMC device 

Historically in coreboot, the PMC's fixed PCI resources were described
by the System Agent (the MMIO resource), and eSPI/LPC (the I/O
resource). This patch moves both of those to a new Intel SoC-specific
function, soc_pmc_read_resources(). On TGL, this new function takes care
of providing the MMIO and I/O resources for the PMC.

BUG=b:156388055
TEST=verified on volteer that the resource allocator is aware of and
does not touch these two resources:
("PCI: 00:1f.2 resource base fe000000 size 10000 align 0 gran 0 limit 0
	flags f0000200 index 0
  PCI: 00:1f.2 resource base 1800 size 100 align 0 gran 0 limit 18ff
	flags c0000100 index 1")

Also verify that the MEM resource is described in the coreboot table:
("BIOS-e820: [mem 0x00000000fe000000-0x00000000fe00ffff] reserved")

Verified the memory range is also untouchable from Linux:
("system 00:00: [mem 0xfe000000-0xffffffff] could not be reserved")

Change-Id: Ia7c6ae849aefaf549fb682416a87320907fb3fe3
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41385
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Tim Wawrzynczak 2020-05-13 17:00:33 -06:00 committed by Patrick Georgi
parent dbcf7b1621
commit 6d20d0c140
9 changed files with 42 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/mainboard/google/deltaur/variants/baseboard/devicetree.cb
View File

@ -305,7 +305,7 @@ chip soc/intel/tigerlake
end
end # eSPI
device pci 1f.1 off end # P2SB
device pci 1f.2 on end # PMC
device pci 1f.2 hidden end # PMC
device pci 1f.3 on end # Intel HDA
device pci 1f.4 on end # SMBus
device pci 1f.5 on end # PCH SPI Flash Controller

2
src/mainboard/google/volteer/variants/baseboard/devicetree.cb
View File

@ -387,7 +387,7 @@ chip soc/intel/tigerlake
end
end # eSPI 0xA080 - A09F
device pci 1f.1 off end # P2SB 0xA0A0
device pci 1f.2 on end # PMC 0xA0A1
device pci 1f.2 hidden end # PMC 0xA0A1
device pci 1f.3 on
chip drivers/generic/max98357a
register "hid" = ""MX98357A""

2
src/mainboard/intel/tglrvp/variants/tglrvp_up3/devicetree.cb
View File

@ -243,7 +243,7 @@ chip soc/intel/tigerlake
device pci 1e.3 off end # GSPI1 0xA0AB
device pci 1f.0 on end # eSPI 0xA080 - A09F
device pci 1f.1 on end # P2SB 0xA0A0
device pci 1f.2 on end # PMC 0xA0A1
device pci 1f.2 hidden end # PMC 0xA0A1
device pci 1f.3 on end # Intel HD audio 0xA0C8-A0CF
device pci 1f.4 on end # SMBus 0xA0A3
device pci 1f.5 on end # SPI 0xA0A4

2
src/mainboard/intel/tglrvp/variants/tglrvp_up4/devicetree.cb
View File

@ -239,7 +239,7 @@ chip soc/intel/tigerlake
device pci 1e.3 off end # GSPI1 0xA0AB
device pci 1f.0 on end # eSPI 0xA080 - A09F
device pci 1f.1 on end # P2SB 0xA0A0
device pci 1f.2 on end # PMC 0xA0A1
device pci 1f.2 hidden end # PMC 0xA0A1
device pci 1f.3 on end # Intel HD audio 0xA0C8-A0CF
device pci 1f.4 on end # SMBus 0xA0A3
device pci 1f.5 on end # SPI 0xA0A4

9
src/soc/intel/tigerlake/chip.c
View File

@ -1,5 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <fsp/api.h>
@ -151,11 +152,17 @@ static struct device_operations cpu_bus_ops = {
static void soc_enable(struct device *dev)
{
/* Set the operations if it is a special bus type */
/*
* Set the operations if it is a special bus type or a hidden PCI
* device.
*/
if (dev->path.type == DEVICE_PATH_DOMAIN)
dev->ops = &pci_domain_ops;
else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER)
dev->ops = &cpu_bus_ops;
else if (dev->path.type == DEVICE_PATH_PCI &&
dev->path.pci.devfn == PCH_DEVFN_PMC)
dev->ops = &pmc_ops;
}
struct chip_operations soc_intel_tigerlake_ops = {

17
src/soc/intel/tigerlake/espi.c
View File

@ -197,21 +197,4 @@ void lpc_soc_init(struct device *dev)
soc_mirror_dmi_pcr_io_dec();
}
/* Fill up ESPI IO resource structure inside SoC directory */
void pch_lpc_soc_fill_io_resources(struct device *dev)
{
/*
* PMC pci device gets hidden from PCI bus due to Silicon
* policy hence bind ACPI BASE aka ABASE (offset 0x20) with
* ESPI IO resources to ensure that ABASE falls under PCI reserved
* IO memory range.
*
* Note: Don't add any more resource with same offset 0x20
* under this device space.
*/
pch_lpc_add_new_resource(dev, PCI_BASE_ADDRESS_4,
ACPI_BASE_ADDRESS, ACPI_BASE_SIZE, IORESOURCE_IO |
IORESOURCE_ASSIGNED | IORESOURCE_FIXED);
}
#endif

4
src/soc/intel/tigerlake/include/soc/pmc.h
View File

@ -3,6 +3,10 @@
#ifndef _SOC_TIGERLAKE_PMC_H_
#define _SOC_TIGERLAKE_PMC_H_
#include <device/device.h>
extern struct device_operations pmc_ops;
/* PCI Configuration Space (D31:F2): PMC */
#define PWRMBASE 0x10
#define ABASE 0x20

31
src/soc/intel/tigerlake/pmc.c
View File

@ -75,7 +75,7 @@ static void config_deep_sx(uint32_t deepsx_config)
write32(pmcbase + DSX_CFG, reg);
}
static void pmc_init(void *unused)
static void pmc_init(struct device *dev)
{
const config_t *config = config_of_soc();
@ -91,11 +91,24 @@ static void pmc_init(void *unused)
config_deep_sx(config->deep_sx_config);
}
/*
* Initialize PMC controller.
*
* PMC controller gets hidden from PCI bus during FSP-Silicon init call.
* Hence PCI enumeration can't be used to initialize bus device and
* allocate resources.
*/
BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_EXIT, pmc_init, NULL);
static void soc_pmc_read_resources(struct device *dev)
{
struct resource *res;
/* Add the fixed MMIO resource */
mmio_resource(dev, 0, PCH_PWRM_BASE_ADDRESS / KiB, PCH_PWRM_BASE_SIZE / KiB);
/* Add the fixed I/O resource */
res = new_resource(dev, 1);
res->base = (resource_t)ACPI_BASE_ADDRESS;
res->size = (resource_t)ACPI_BASE_SIZE;
res->limit = res->base + res->size - 1;
res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}
struct device_operations pmc_ops = {
.read_resources = soc_pmc_read_resources,
.set_resources = noop_set_resources,
.enable = pmc_init,
.scan_bus = scan_static_bus,
};

11
src/soc/intel/tigerlake/systemagent.c
View File

@ -32,17 +32,6 @@ void soc_add_fixed_mmio_resources(struct device *dev, int *index)
{ EPBAR, EP_BASE_ADDRESS, EP_BASE_SIZE, "EPBAR" },
{ REGBAR, REG_BASE_ADDRESS, REG_BASE_SIZE, "REGBAR" },
{ EDRAMBAR, EDRAM_BASE_ADDRESS, EDRAM_BASE_SIZE, "EDRAMBAR" },
/*
* PMC pci device gets hidden from PCI bus due to Silicon
* policy hence binding PMCBAR aka PWRMBASE (offset 0x10) with
* SA resources to ensure that PMCBAR falls under PCI reserved
* memory range.
*
* Note: Don't add any more resource with same offset 0x10
* under this device space.
*/
{ PCI_BASE_ADDRESS_0, PCH_PWRM_BASE_ADDRESS, PCH_PWRM_BASE_SIZE,
"PMCBAR" },
};
sa_add_fixed_mmio_resources(dev, index, soc_fixed_resources,