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/* SPDX-License-Identifier: GPL-2.0-only */
#include <cbmem.h>
#include <console/console.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <stdint.h>
#include <device/device.h>
#include <boot/tables.h>
#include <acpi/acpi.h>
#include <northbridge/intel/pineview/pineview.h>
#include <cpu/intel/smm_reloc.h>
/*
* Reserve everything between A segment and 1MB:
*
* 0xa0000 - 0xbffff: legacy VGA
* 0xc0000 - 0xcffff: VGA OPROM (needed by kernel)
* 0xe0000 - 0xfffff: SeaBIOS, if used, otherwise DMI
*/
static const int legacy_hole_base_k = 0xa0000 / 1024;
static void add_fixed_resources(struct device *dev, int index)
{
struct resource *resource;
resource = new_resource(dev, index++);
resource->base = (resource_t) 0xfed00000;
resource->size = (resource_t) 0x00100000;
resource->flags = IORESOURCE_MEM
| IORESOURCE_RESERVE
| IORESOURCE_FIXED
| IORESOURCE_STORED
| IORESOURCE_ASSIGNED;
mmio_resource(dev, index++, legacy_hole_base_k, (0xc0000 >> 10) - legacy_hole_base_k);
reserved_ram_resource(dev, index++, 0xc0000 >> 10, (0x100000 - 0xc0000) >> 10);
}
static void mch_domain_read_resources(struct device *dev)
{
u64 tom, touud;
u32 tomk, tolud, tseg_sizek;
u32 pcie_config_base, pcie_config_size, cbmem_topk, delta_cbmem;
u16 index;
const u32 top32memk = 4 * (GiB / KiB);
struct device *mch = pcidev_on_root(0, 0);
index = 3;
pci_domain_read_resources(dev);
/* Top of Upper Usable DRAM, including remap */
touud = pci_read_config16(mch, TOUUD);
touud <<= 20;
/* Top of Lower Usable DRAM */
tolud = pci_read_config16(mch, TOLUD) & 0xfff0;
tolud <<= 16;
/* Top of Memory - does not account for any UMA */
tom = pci_read_config16(mch, TOM) & 0x01ff;
tom <<= 27;
printk(BIOS_DEBUG, "TOUUD 0x%llx TOLUD 0x%08x TOM 0x%llx ", touud, tolud, tom);
tomk = tolud >> 10;
/* Graphics memory */
const u16 ggc = pci_read_config16(mch, GGC);
const u32 gms_sizek = decode_igd_memory_size((ggc >> 4) & 0xf);
printk(BIOS_DEBUG, "%uM UMA", gms_sizek >> 10);
tomk -= gms_sizek;
/* GTT Graphics Stolen Memory Size (GGMS) */
const u32 gsm_sizek = decode_igd_gtt_size((ggc >> 8) & 0xf);
printk(BIOS_DEBUG, " and %uM GTT\n", gsm_sizek >> 10);
tomk -= gsm_sizek;
const u32 tseg_basek = pci_read_config32(mch, TSEG) >> 10;
const u32 igd_basek = pci_read_config32(mch, GBSM) >> 10;
const u32 gtt_basek = pci_read_config32(mch, BGSM) >> 10;
/* Subtract TSEG size */
tseg_sizek = gtt_basek - tseg_basek;
tomk -= tseg_sizek;
printk(BIOS_DEBUG, "TSEG decoded, subtracting %dM\n", tseg_sizek >> 10);
/* cbmem_top can be shifted downwards due to alignment.
Mark the region between cbmem_top and tomk as unusable */
cbmem_topk = (uint32_t)cbmem_top() >> 10;
delta_cbmem = tomk - cbmem_topk;
tomk -= delta_cbmem;
printk(BIOS_DEBUG, "Unused RAM between cbmem_top and TOMK: 0x%xK\n", delta_cbmem);
/* Report the memory regions */
ram_resource(dev, index++, 0, 640);
ram_resource(dev, index++, 768, tomk - 768);
reserved_ram_resource(dev, index++, tseg_basek, tseg_sizek);
reserved_ram_resource(dev, index++, gtt_basek, gsm_sizek);
reserved_ram_resource(dev, index++, igd_basek, gms_sizek);
reserved_ram_resource(dev, index++, cbmem_topk, delta_cbmem);
/*
* If > 4GB installed then memory from TOLUD to 4GB
* is remapped above TOM, TOUUD will account for both
*/
touud >>= 10; /* Convert to KB */
if (touud > top32memk) {
ram_resource(dev, index++, top32memk, touud - top32memk);
printk(BIOS_INFO, "Available memory above 4GB: %lluM\n",
(touud - top32memk) >> 10);
}
if (decode_pciebar(&pcie_config_base, &pcie_config_size)) {
printk(BIOS_DEBUG, "Adding PCIe config bar base=0x%08x size=0x%x\n",
pcie_config_base, pcie_config_size);
fixed_mem_resource(dev, index++, pcie_config_base >> 10,
pcie_config_size >> 10, IORESOURCE_RESERVE);
}
add_fixed_resources(dev, index);
}
void northbridge_write_smram(u8 smram)
{
struct device *dev = pcidev_on_root(0, 0);
if (dev == NULL)
die("could not find pci 00:00.0!\n");
pci_write_config8(dev, SMRAM, smram);
}
static void mch_domain_set_resources(struct device *dev)
{
struct resource *res;
for (res = dev->resource_list; res; res = res->next)
report_resource_stored(dev, res, "");
assign_resources(dev->link_list);
}
static void mch_domain_init(struct device *dev)
{
u32 reg32;
/* Enable SERR */
reg32 = pci_read_config32(dev, PCI_COMMAND);
reg32 |= PCI_COMMAND_SERR;
pci_write_config32(dev, PCI_COMMAND, reg32);
}
static const char *northbridge_acpi_name(const struct device *dev)
{
if (dev->path.type == DEVICE_PATH_DOMAIN)
return "PCI0";
if (dev->path.type != DEVICE_PATH_PCI || dev->bus->secondary != 0)
return NULL;
switch (dev->path.pci.devfn) {
case PCI_DEVFN(0, 0):
return "MCHC";
}
return NULL;
}
static struct device_operations pci_domain_ops = {
.read_resources = mch_domain_read_resources,
.set_resources = mch_domain_set_resources,
.init = mch_domain_init,
.scan_bus = pci_domain_scan_bus,
.acpi_fill_ssdt = generate_cpu_entries,
.acpi_name = northbridge_acpi_name,
};
static struct device_operations cpu_bus_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.init = mp_cpu_bus_init,
};
static void enable_dev(struct device *dev)
{
/* Set the operations if it is a special bus type */
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;
}
}
struct chip_operations northbridge_intel_pineview_ops = {
CHIP_NAME("Intel Pineview Northbridge")
.enable_dev = enable_dev,
};
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