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authorJordan Crouse <jordan.crouse@amd.com>2008-10-20 16:51:20 +0000
committerJordan Crouse <jordan.crouse@amd.com>2008-10-20 16:51:20 +0000
commit369a5f6c7a18516cb4da054d0e328f7464da9da7 (patch)
treecbb2dd56a1ec1227e8e8295c750c65bbe77c0bb6 /payloads/libpayload/drivers
parent17f6a8778817ad592a2458083a1ba46032df22f6 (diff)
downloadcoreboot-369a5f6c7a18516cb4da054d0e328f7464da9da7.tar.xz
[PATCH] libpayload: Add pci_set_bus_master() function
Allow the payload to enable a PCI device as a bus master. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Acked-by: Patrick Georgi <patrick.georgi@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3672 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'payloads/libpayload/drivers')
-rw-r--r--payloads/libpayload/drivers/pci.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/pci.c b/payloads/libpayload/drivers/pci.c
index fc1940afbc..be92613e88 100644
--- a/payloads/libpayload/drivers/pci.c
+++ b/payloads/libpayload/drivers/pci.c
@@ -112,3 +112,11 @@ u32 pci_read_resource(pcidev_t dev, int bar)
{
return pci_read_config32(dev, 0x10 + (bar * 4));
}
+
+void pci_set_bus_master(pcidev_t dev)
+{
+ u16 val = pci_read_config16(dev, REG_COMMAND);
+ val |= REG_COMMAND_BM;
+ pci_write_config16(dev, REG_COMMAND, val);
+}
+