Denis Carikli (GNUtoo@no-log.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3273
-gerrit
commit 34334d963b4e9306868cba35507f3a273e968c1a Author: Denis 'GNUtoo' Carikli GNUtoo@no-log.org Date: Mon Apr 22 00:13:15 2013 +0200
Lenovo ThinkPad X60: Native VGA init: Add MARK_GRAPHICS_MEM_WRCOMB
This commit is based on the commit f567f16af4c3cbfcadc3bc5c44b569a592829262 (sandybridge: add option to mark graphics memory write-combining.)
Change-Id: If4bfbe6fe975fbda93b08d68596ef0a1378a2c17 Signed-off-by: Denis 'GNUtoo' Carikli GNUtoo@no-log.org --- src/mainboard/lenovo/x60/Kconfig | 1 + src/northbridge/intel/i945/Kconfig | 8 ++++++++ src/northbridge/intel/i945/gma.c | 19 ++++++++++++++++++- 3 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/src/mainboard/lenovo/x60/Kconfig b/src/mainboard/lenovo/x60/Kconfig index 1431a2f..737a789 100644 --- a/src/mainboard/lenovo/x60/Kconfig +++ b/src/mainboard/lenovo/x60/Kconfig @@ -25,6 +25,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy select USE_OPTION_TABLE select MAINBOARD_HAS_NATIVE_VGA_INIT select EARLY_CBMEM_INIT + select MARK_GRAPHICS_MEM_WRCOMB
config MAINBOARD_DIR string diff --git a/src/northbridge/intel/i945/Kconfig b/src/northbridge/intel/i945/Kconfig index aec3e33..98170d2 100644 --- a/src/northbridge/intel/i945/Kconfig +++ b/src/northbridge/intel/i945/Kconfig @@ -66,4 +66,12 @@ config CHECK_SLFRCS_ON_RESUME On other boards the check always creates a false positive, effectively making it impossible to resume.
+config MARK_GRAPHICS_MEM_WRCOMB + bool "Mark graphics memory as write-combining." + default n + help + The graphics performance may increase if the graphics + memory is set as write-combining cache type. This option + enables marking the graphics memory as write-combining. + endif diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c index 20e8bf3..e63178d 100644 --- a/src/northbridge/intel/i945/gma.c +++ b/src/northbridge/intel/i945/gma.c @@ -107,12 +107,29 @@ static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device) } }
+static void gma_read_resources(struct device *dev) +{ + pci_dev_read_resources(dev); + +#if CONFIG_MARK_GRAPHICS_MEM_WRCOMB + struct resource *res; + + /* Set the graphics memory to write combining. */ + res = find_resource(dev, PCI_BASE_ADDRESS_2); + if (res == NULL) { + printk(BIOS_DEBUG, "gma: memory resource not found.\n"); + return; + } + res->flags |= IORESOURCE_WRCOMB; +#endif +} + static struct pci_operations gma_pci_ops = { .set_subsystem = gma_set_subsystem, };
static struct device_operations gma_func0_ops = { - .read_resources = pci_dev_read_resources, + .read_resources = gma_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = gma_func0_init,