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-rw-r--r--src/northbridge/intel/haswell/haswell.h9
-rw-r--r--src/northbridge/intel/haswell/northbridge.c457
2 files changed, 275 insertions, 191 deletions
diff --git a/src/northbridge/intel/haswell/haswell.h b/src/northbridge/intel/haswell/haswell.h
index 967a186e81..bbb51aaf81 100644
--- a/src/northbridge/intel/haswell/haswell.h
+++ b/src/northbridge/intel/haswell/haswell.h
@@ -63,7 +63,6 @@
#define MCHBAR 0x48
#define PCIEXBAR 0x60
#define DMIBAR 0x68
-#define X60BAR 0x60
#define GGC 0x50 /* GMCH Graphics Control */
@@ -91,8 +90,14 @@
#define G_SMRAME (1 << 3)
#define C_BASE_SEG ((0 << 2) | (1 << 1) | (0 << 0))
-#define TOM 0xa0
+#define MESEG_BASE 0x70 /* Management Engine Base. */
+#define MESEG_LIMIT 0x78 /* Management Engine Limit. */
+#define REMAPBASE 0x90 /* Remap base. */
+#define REMAPLIMIT 0x98 /* Remap limit. */
+#define TOM 0xa0 /* Top of DRAM in memory controller space. */
#define TOUUD 0xa8 /* Top of Upper Usable DRAM */
+#define BDSM 0xb0 /* Base Data Stolen Memory */
+#define BGSM 0xb4 /* Base GTT Stolen Memory */
#define TSEG 0xb8 /* TSEG base */
#define TOLUD 0xbc /* Top of Low Used Memory */
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c
index 5731077999..e97ef55699 100644
--- a/src/northbridge/intel/haswell/northbridge.c
+++ b/src/northbridge/intel/haswell/northbridge.c
@@ -65,19 +65,14 @@ void cbmem_post_handling(void)
update_mrc_cache();
}
-static int get_pcie_bar(u32 *base, u32 *len)
+static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len)
{
- device_t dev;
u32 pciexbar_reg;
*base = 0;
*len = 0;
- dev = dev_find_slot(0, PCI_DEVFN(0, 0));
- if (!dev)
- return 0;
-
- pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
+ pciexbar_reg = pci_read_config32(dev, index);
if (!(pciexbar_reg & (1 << 0)))
return 0;
@@ -100,221 +95,305 @@ static int get_pcie_bar(u32 *base, u32 *len)
return 0;
}
-static void add_fixed_resources(struct device *dev, int index)
+static void pci_domain_set_resources(device_t dev)
{
- struct resource *resource;
- u32 pcie_config_base, pcie_config_size;
-
- printk(BIOS_DEBUG, "Adding UMA memory area base=0x%llx "
- "size=0x%llx\n", uma_memory_base, uma_memory_size);
- resource = new_resource(dev, index);
- resource->base = (resource_t) uma_memory_base;
- resource->size = (resource_t) uma_memory_size;
- resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
- IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
-
- /* Clear these values here so they don't get used by MTRR code */
- uma_memory_base = 0;
- uma_memory_size = 0;
-
- if (get_pcie_bar(&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);
- resource = new_resource(dev, index+1);
- resource->base = (resource_t) pcie_config_base;
- resource->size = (resource_t) pcie_config_size;
- resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
- IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
- }
-
- mmio_resource(dev, index++, legacy_hole_base_k, legacy_hole_size_k);
+ assign_resources(dev->link_list);
+}
-#if CONFIG_CHROMEOS_RAMOOPS
- mmio_resource(dev, index++, CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10,
- CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10);
+ /* TODO We could determine how many PCIe busses we need in
+ * the bar. For now that number is hardcoded to a max of 64.
+ * See e7525/northbridge.c for an example.
+ */
+static struct device_operations pci_domain_ops = {
+ .read_resources = pci_domain_read_resources,
+ .set_resources = pci_domain_set_resources,
+ .enable_resources = NULL,
+ .init = NULL,
+ .scan_bus = pci_domain_scan_bus,
+#if CONFIG_MMCONF_SUPPORT_DEFAULT
+ .ops_pci_bus = &pci_ops_mmconf,
+#else
+ .ops_pci_bus = &pci_cf8_conf1,
#endif
+};
- /* Required for SandyBridge sighting 3715511 */
- bad_ram_resource(dev, index++, 0x20000000 >> 10, 0x00200000 >> 10);
- bad_ram_resource(dev, index++, 0x40000000 >> 10, 0x00200000 >> 10);
+static int get_bar(device_t dev, unsigned int index, u32 *base, u32 *len)
+{
+ u32 bar;
+
+ bar = pci_read_config32(dev, index);
+
+ /* If not enabled don't report it. */
+ if (!(bar & 0x1))
+ return 0;
+
+ /* Knock down the enable bit. */
+ *base = bar & ~1;
+
+ return 1;
}
-static void pci_domain_set_resources(device_t dev)
+/* There are special BARs that actually are programmed in the MCHBAR. These
+ * Intel special features, but they do consume resources that need to be
+ * accounted for. */
+static int get_bar_in_mchbar(device_t dev, unsigned int index, u32 *base,
+ u32 *len)
{
- uint64_t tom, me_base, touud;
- uint32_t tseg_base, uma_size, tolud;
- uint16_t ggc;
- unsigned long long tomk;
+ u32 bar;
- /* Total Memory 2GB example:
- *
- * 00000000 0000MB-1992MB 1992MB RAM (writeback)
- * 7c800000 1992MB-2000MB 8MB TSEG (SMRR)
- * 7d000000 2000MB-2002MB 2MB GFX GTT (uncached)
- * 7d200000 2002MB-2034MB 32MB GFX UMA (uncached)
- * 7f200000 2034MB TOLUD
- * 7f800000 2040MB MEBASE
- * 7f800000 2040MB-2048MB 8MB ME UMA (uncached)
- * 80000000 2048MB TOM
- * 100000000 4096MB-4102MB 6MB RAM (writeback)
- *
- * Total Memory 4GB example:
- *
- * 00000000 0000MB-2768MB 2768MB RAM (writeback)
- * ad000000 2768MB-2776MB 8MB TSEG (SMRR)
- * ad800000 2776MB-2778MB 2MB GFX GTT (uncached)
- * ada00000 2778MB-2810MB 32MB GFX UMA (uncached)
- * afa00000 2810MB TOLUD
- * ff800000 4088MB MEBASE
- * ff800000 4088MB-4096MB 8MB ME UMA (uncached)
- * 100000000 4096MB TOM
- * 100000000 4096MB-5374MB 1278MB RAM (writeback)
- * 14fe00000 5368MB TOUUD
- */
+ bar = MCHBAR32(index);
- /* Top of Upper Usable DRAM, including remap */
- touud = pci_read_config32(dev, TOUUD+4);
- touud <<= 32;
- touud |= pci_read_config32(dev, TOUUD) & ~1;
-
- /* Top of Lower Usable DRAM */
- tolud = pci_read_config32(dev, TOLUD) & ~1;
-
- /* Top of Memory - does not account for any UMA */
- tom = pci_read_config32(dev, 0xa4);
- tom <<= 32;
- tom |= pci_read_config32(dev, 0xa0) & ~1;
-
- printk(BIOS_DEBUG, "TOUUD 0x%llx TOLUD 0x%08x TOM 0x%llx\n",
- touud, tolud, tom);
-
- /* ME UMA needs excluding if total memory <4GB */
- me_base = pci_read_config32(dev, 0x74);
- me_base <<= 32;
- me_base |= pci_read_config32(dev, 0x70);
-
- printk(BIOS_DEBUG, "MEBASE 0x%llx\n", me_base);
-
- tomk = tolud >> 10;
- if (me_base == tolud) {
- /* ME is from MEBASE-TOM */
- uma_size = (tom - me_base) >> 10;
- /* Increment TOLUD to account for ME as RAM */
- tolud += uma_size << 10;
- /* UMA starts at old TOLUD */
- uma_memory_base = tomk * 1024ULL;
- uma_memory_size = uma_size * 1024ULL;
- printk(BIOS_DEBUG, "ME UMA base 0x%llx size %uM\n",
- me_base, uma_size >> 10);
- }
+ /* If not enabled don't report it. */
+ if (!(bar & 0x1))
+ return 0;
+
+ /* Knock down the enable bit. */
+ *base = bar & ~1;
- /* Graphics memory comes next */
- ggc = pci_read_config16(dev, GGC);
- if (!(ggc & 2)) {
- printk(BIOS_DEBUG, "IGD decoded, subtracting ");
-
- /* Graphics memory */
- uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL;
- printk(BIOS_DEBUG, "%uM UMA", uma_size >> 10);
- tomk -= uma_size;
- uma_memory_base = tomk * 1024ULL;
- uma_memory_size += uma_size * 1024ULL;
-
- /* GTT Graphics Stolen Memory Size (GGMS) */
- uma_size = ((ggc >> 8) & 0x3) * 1024ULL;
- tomk -= uma_size;
- uma_memory_base = tomk * 1024ULL;
- uma_memory_size += uma_size * 1024ULL;
- printk(BIOS_DEBUG, " and %uM GTT\n", uma_size >> 10);
+ return 1;
+}
+
+struct fixed_mmio_descriptor {
+ unsigned int index;
+ u32 size;
+ int (*get_resource)(device_t dev, unsigned int index,
+ u32 *base, u32 *size);
+ const char *description;
+};
+
+#define SIZE_KB(x) ((x)*1024)
+struct fixed_mmio_descriptor mc_fixed_resources[] = {
+ { PCIEXBAR, SIZE_KB(0), get_pcie_bar, "PCIEXBAR" },
+ { MCHBAR, SIZE_KB(32), get_bar, "MCHBAR" },
+ { DMIBAR, SIZE_KB(4), get_bar, "DMIBAR" },
+ { EPBAR, SIZE_KB(4), get_bar, "EPBAR" },
+ { 0x5420, SIZE_KB(4), get_bar_in_mchbar, "GDXCBAR" },
+ { 0x5408, SIZE_KB(16), get_bar_in_mchbar, "EDRAMBAR" },
+};
+#undef SIZE_KB
+
+/*
+ * Add all known fixed MMIO ranges that hang off the host bridge/memory
+ * controller device.
+ */
+static void mc_add_fixed_mmio_resources(device_t dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mc_fixed_resources); i++) {
+ u32 base;
+ u32 size;
+ struct resource *resource;
+ unsigned int index;
+
+ size = mc_fixed_resources[i].size;
+ index = mc_fixed_resources[i].index;
+ if (!mc_fixed_resources[i].get_resource(dev, index,
+ &base, &size))
+ continue;
+
+ resource = new_resource(dev, mc_fixed_resources[i].index);
+ resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
+ IORESOURCE_STORED | IORESOURCE_RESERVE |
+ IORESOURCE_ASSIGNED;
+ resource->base = base;
+ resource->size = size;
+ printk(BIOS_DEBUG, "%s: Adding %s @ %x 0x%08lx-0x%08lx.\n",
+ __func__, mc_fixed_resources[i].description, index,
+ (unsigned long)base, (unsigned long)(base + size - 1));
}
+}
- /* Calculate TSEG size from its base which must be below GTT */
- tseg_base = pci_read_config32(dev, 0xb8);
- uma_size = (uma_memory_base - tseg_base) >> 10;
- tomk -= uma_size;
- uma_memory_base = tomk * 1024ULL;
- uma_memory_size += uma_size * 1024ULL;
- printk(BIOS_DEBUG, "TSEG base 0x%08x size %uM\n",
- tseg_base, uma_size >> 10);
+/* Host Memory Map:
+ *
+ * +--------------------------+ TOUUD
+ * | |
+ * +--------------------------+ 4GiB
+ * | PCI Address Space |
+ * +--------------------------+ TOLUD (also maps into MC address space)
+ * | iGD |
+ * +--------------------------+ BDSM
+ * | GTT |
+ * +--------------------------+ BGSM
+ * | TSEG |
+ * +--------------------------+ TSEGMB
+ * | Usage DRAM |
+ * +--------------------------+ 0
+ *
+ * Some of the base registers above can be equal making the size of those
+ * regions 0. The reason is because the memory controller internally subtracts
+ * the base registers from each other to determine sizes of the regions. In
+ * other words, the memory map is in a fixed order no matter what.
+ */
- printk(BIOS_INFO, "Available memory below 4GB: %lluM\n", tomk >> 10);
+struct map_entry {
+ int reg;
+ int is_64_bit;
+ int is_limit;
+ const char *description;
+};
- /* Report the memory regions */
- ram_resource(dev, 3, 0, legacy_hole_base_k);
- ram_resource(dev, 4, legacy_hole_base_k + legacy_hole_size_k,
- (tomk - (legacy_hole_base_k + legacy_hole_size_k)));
+static void read_map_entry(device_t dev, struct map_entry *entry,
+ uint64_t *result)
+{
+ uint64_t value;
+ uint64_t mask;
- /*
- * 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 > 4096 * 1024) {
- ram_resource(dev, 5, 4096 * 1024, touud - (4096 * 1024));
- printk(BIOS_INFO, "Available memory above 4GB: %lluM\n",
- (touud >> 10) - 4096);
+ /* All registers are on a 1MiB granularity. */
+ mask = ((1ULL<<20)-1);
+ mask = ~mask;
+
+ value = 0;
+
+ if (entry->is_64_bit) {
+ value = pci_read_config32(dev, entry->reg + 4);
+ value <<= 32;
}
- add_fixed_resources(dev, 6);
+ value |= pci_read_config32(dev, entry->reg);
+ value &= mask;
- assign_resources(dev->link_list);
+ if (entry->is_limit)
+ value |= ~mask;
- /* Leave some space for ACPI, PIRQ and MP tables */
- high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
- high_tables_size = HIGH_MEMORY_SIZE;
+ *result = value;
}
- /* TODO We could determine how many PCIe busses we need in
- * the bar. For now that number is hardcoded to a max of 64.
- * See e7525/northbridge.c for an example.
- */
-static struct device_operations pci_domain_ops = {
- .read_resources = pci_domain_read_resources,
- .set_resources = pci_domain_set_resources,
- .enable_resources = NULL,
- .init = NULL,
- .scan_bus = pci_domain_scan_bus,
-#if CONFIG_MMCONF_SUPPORT_DEFAULT
- .ops_pci_bus = &pci_ops_mmconf,
-#else
- .ops_pci_bus = &pci_cf8_conf1,
-#endif
+#define MAP_ENTRY(reg_, is_64_, is_limit_, desc_) \
+ { \
+ .reg = reg_, \
+ .is_64_bit = is_64_, \
+ .is_limit = is_limit_, \
+ .description = desc_, \
+ }
+
+#define MAP_ENTRY_BASE_64(reg_, desc_) \
+ MAP_ENTRY(reg_, 1, 0, desc_)
+#define MAP_ENTRY_LIMIT_64(reg_, desc_) \
+ MAP_ENTRY(reg_, 1, 1, desc_)
+#define MAP_ENTRY_BASE_32(reg_, desc_) \
+ MAP_ENTRY(reg_, 0, 0, desc_)
+
+enum {
+ TOM_REG,
+ TOUUD_REG,
+ MESEG_BASE_REG,
+ MESEG_LIMIT_REG,
+ REMAP_BASE_REG,
+ REMAP_LIMIT_REG,
+ TOLUD_REG,
+ BGSM_REG,
+ BDSM_REG,
+ TSEG_REG,
+ // Must be last.
+ NUM_MAP_ENTRIES
};
-static void mc_read_resources(device_t dev)
+static struct map_entry memory_map[NUM_MAP_ENTRIES] = {
+ [TOM_REG] = MAP_ENTRY_BASE_64(TOM, "TOM"),
+ [TOUUD_REG] = MAP_ENTRY_BASE_64(TOUUD, "TOUUD"),
+ [MESEG_BASE_REG] = MAP_ENTRY_BASE_64(MESEG_BASE, "MESEG_BASE"),
+ [MESEG_LIMIT_REG] = MAP_ENTRY_LIMIT_64(MESEG_LIMIT, "MESEG_LIMIT"),
+ [REMAP_BASE_REG] = MAP_ENTRY_BASE_64(REMAPBASE, "REMAP_BASE"),
+ [REMAP_LIMIT_REG] = MAP_ENTRY_LIMIT_64(REMAPLIMIT, "REMAP_LIMIT"),
+ [TOLUD_REG] = MAP_ENTRY_BASE_32(TOLUD, "TOLUD"),
+ [BGSM_REG] = MAP_ENTRY_BASE_32(BDSM, "BDSM"),
+ [BDSM_REG] = MAP_ENTRY_BASE_32(BGSM, "BGSM"),
+ [TSEG_REG] = MAP_ENTRY_BASE_32(TSEG, "TESGMB"),
+};
+
+static void mc_read_map_entries(device_t dev, uint64_t *values)
{
+ int i;
+ for (i = 0; i < NUM_MAP_ENTRIES; i++) {
+ read_map_entry(dev, &memory_map[i], &values[i]);
+ }
+}
+
+static void mc_report_map_entries(device_t dev, uint64_t *values)
+{
+ int i;
+ for (i = 0; i < NUM_MAP_ENTRIES; i++) {
+ printk(BIOS_DEBUG, "MC MAP: %s: 0x%llx\n",
+ memory_map[i].description, values[i]);
+ }
+ /* One can validate the BDSM and BGSM against the GGC. */
+ printk(BIOS_DEBUG, "MC MAP: GGC: 0x%x\n", pci_read_config16(dev, GGC));
+}
+
+static void mc_add_dram_resources(device_t dev)
+{
+ unsigned long base_k, size_k;
+ unsigned long index;
struct resource *resource;
+ uint64_t mc_values[NUM_MAP_ENTRIES];
- pci_dev_read_resources(dev);
+ /* Read in the MAP registers and report their values. */
+ mc_read_map_entries(dev, &mc_values[0]);
+ mc_report_map_entries(dev, &mc_values[0]);
- /* So, this is one of the big mysteries in the coreboot resource
- * allocator. This resource should make sure that the address space
- * of the PCIe memory mapped config space bar. But it does not.
+ /*
+ * There are 4 host memory ranges that should be added:
+ * - 0 -> 0xa0000 : cacheable
+ * - 0xc0000 -> TSEG : cacheable
+ * - TESG -> TOLUD: not cacheable with standard MTRRs and reserved
+ * - 4GiB -> TOUUD: cacheable
+ *
+ * The range 0xa0000 -> 0xc0000 does not have any resources
+ * associated with it to handle legacy VGA memory. If this range
+ * is not omitted the mtrr code will setup the area as cacheable
+ * causing VGA access to not work.
+ *
+ * The resource index starts low and should not meet or exceed
+ * PCI_BASE_ADDRESS_0. In this case there are only 3 entries so there
+ * are no conflicts in the index space.
*/
+ index = 0;
+
+ /* 0 - > 0xa0000 */
+ base_k = 0;
+ size_k = 0xa0000 >> 10;
+ ram_resource(dev, index++, base_k, size_k);
+
+ /* 0xa0000 -> TSEG */
+ base_k = 0xc0000 >> 10;
+ size_k = (unsigned long)(mc_values[TSEG_REG] >> 10) - base_k;
+ ram_resource(dev, index++, base_k, size_k);
+
+ /* TSEG -> TOLUD */
+ resource = new_resource(dev, index++);
+ resource->base = mc_values[TSEG_REG];
+ resource->size = mc_values[TOLUD_REG] - resource->base;
+ resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
+ IORESOURCE_STORED | IORESOURCE_RESERVE |
+ IORESOURCE_ASSIGNED;
+
+ /* 4GiB -> TOUUD */
+ base_k = 4096 * 1024; /* 4GiB */
+ size_k = (unsigned long)(mc_values[TOUUD_REG] >> 10) - base_k;
+ ram_resource(dev, index++, base_k, size_k);
+
+ mmio_resource(dev, index++, legacy_hole_base_k, legacy_hole_size_k);
+#if CONFIG_CHROMEOS_RAMOOPS
+ mmio_resource(dev, index++, CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10,
+ CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10);
+#endif
- /* We use 0xcf as an unused index for our PCIe bar so that we find it again */
- resource = new_resource(dev, 0xcf);
- resource->base = DEFAULT_PCIEXBAR;
- resource->size = 64 * 1024 * 1024; /* 64MB hard coded PCIe config space */
- resource->flags =
- IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
- IORESOURCE_ASSIGNED;
- printk(BIOS_DEBUG, "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
- (unsigned long)(resource->base), (unsigned long)(resource->base + resource->size));
+ /* Leave some space for ACPI, PIRQ and MP tables */
+ high_tables_size = HIGH_MEMORY_SIZE;
+ high_tables_base = mc_values[TSEG_REG] - high_tables_size;
}
-static void mc_set_resources(device_t dev)
+static void mc_read_resources(device_t dev)
{
- struct resource *resource;
+ /* Read standard PCI resources. */
+ pci_dev_read_resources(dev);
- /* Report the PCIe BAR */
- resource = find_resource(dev, 0xcf);
- if (resource) {
- report_resource_stored(dev, resource, "<mmconfig>");
- }
+ /* Add all fixed MMIO resources. */
+ mc_add_fixed_mmio_resources(dev);
- /* And call the normal set_resources */
- pci_dev_set_resources(dev);
+ /* Calculate and add DRAM resources. */
+ mc_add_dram_resources(dev);
}
static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
@@ -453,7 +532,7 @@ static struct pci_operations intel_pci_ops = {
static struct device_operations mc_ops = {
.read_resources = mc_read_resources,
- .set_resources = mc_set_resources,
+ .set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = northbridge_init,
.enable = northbridge_enable,
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-07 23:56:13 +0000