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-rw-r--r--src/northbridge/intel/haswell/acpi.c39
-rw-r--r--src/northbridge/intel/haswell/haswell.h2
-rw-r--r--src/northbridge/intel/haswell/northbridge.c5
3 files changed, 11 insertions, 35 deletions
diff --git a/src/northbridge/intel/haswell/acpi.c b/src/northbridge/intel/haswell/acpi.c
index 1df66bc4d1..cc4487c43c 100644
--- a/src/northbridge/intel/haswell/acpi.c
+++ b/src/northbridge/intel/haswell/acpi.c
@@ -2,6 +2,7 @@
#include <types.h>
#include <console/console.h>
+#include <commonlib/helpers.h>
#include <acpi/acpi.h>
#include <device/device.h>
#include <device/pci_ops.h>
@@ -10,44 +11,12 @@
unsigned long acpi_fill_mcfg(unsigned long current)
{
- struct device *dev;
- u32 pciexbar = 0;
- u32 pciexbar_reg;
- int max_buses;
- u32 mask;
-
- dev = pcidev_on_root(0, 0);
- if (!dev)
- return current;
-
- pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
-
- /* MMCFG not supported or not enabled. */
- if (!(pciexbar_reg & (1 << 0)))
- return current;
+ u32 length, pciexbar;
- mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28);
- switch ((pciexbar_reg >> 1) & 3) {
- case 0: /* 256MB */
- pciexbar = pciexbar_reg & mask;
- max_buses = 256;
- break;
- case 1: /* 128M */
- mask |= (1 << 27);
- pciexbar = pciexbar_reg & mask;
- max_buses = 128;
- break;
- case 2: /* 64M */
- mask |= (1 << 27) | (1 << 26);
- pciexbar = pciexbar_reg & mask;
- max_buses = 64;
- break;
- default: /* RSVD */
+ if (!decode_pcie_bar(&pciexbar, &length))
return current;
- }
- if (!pciexbar)
- return current;
+ const int max_buses = length / MiB;
current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, pciexbar, 0, 0,
max_buses - 1);
diff --git a/src/northbridge/intel/haswell/haswell.h b/src/northbridge/intel/haswell/haswell.h
index 5e28336b0c..9a99c2abc5 100644
--- a/src/northbridge/intel/haswell/haswell.h
+++ b/src/northbridge/intel/haswell/haswell.h
@@ -157,6 +157,8 @@ void haswell_unhide_peg(void);
void report_platform_info(void);
+int decode_pcie_bar(u32 *const base, u32 *const len);
+
#include <device/device.h>
struct acpi_rsdp;
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c
index 0a5af4fa7b..e1c26d162c 100644
--- a/src/northbridge/intel/haswell/northbridge.c
+++ b/src/northbridge/intel/haswell/northbridge.c
@@ -51,6 +51,11 @@ static int get_pcie_bar(struct device *dev, unsigned int index, u32 *base, u32 *
return 0;
}
+int decode_pcie_bar(u32 *const base, u32 *const len)
+{
+ return get_pcie_bar(pcidev_on_root(0, 0), PCIEXBAR, base, len);
+}
+
static const char *northbridge_acpi_name(const struct device *dev)
{
if (dev->path.type == DEVICE_PATH_DOMAIN)