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authorScott Duplichan <scott@notabs.org>2011-05-15 21:10:20 +0000
committerMarc Jones <marc.jones@amd.com>2011-05-15 21:10:20 +0000
commitb0b4063d6a5a43ffb2d9fc6cb6caadc21c31af3c (patch)
tree5fbab27e434dbbbd818cde2c9acedd18fab15113 /src/mainboard/amd/persimmon
parent6f7375c24c0284af1811f7d14118b21fff10160a (diff)
downloadcoreboot-b0b4063d6a5a43ffb2d9fc6cb6caadc21c31af3c.tar.xz
1) Use D18F1xF4 VGA Enable to simplify legacy video I/O support.
2) Extend PCI MMIO limit from dfffffff to fecfffff. 3) Add AMD recommended non-posted mapping for SB800 legacy devices. Signed-off-by: Scott Duplichan <scott@notabs.org> Acked-by: Marc Jones <marcj303@gmail.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6573 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/mainboard/amd/persimmon')
-rw-r--r--src/mainboard/amd/persimmon/agesawrapper.c37
1 files changed, 19 insertions, 18 deletions
diff --git a/src/mainboard/amd/persimmon/agesawrapper.c b/src/mainboard/amd/persimmon/agesawrapper.c
index 649fcb72e4..e946a3bd0a 100644
--- a/src/mainboard/amd/persimmon/agesawrapper.c
+++ b/src/mainboard/amd/persimmon/agesawrapper.c
@@ -85,38 +85,39 @@ agesawrapper_amdinitcpuio (
PCI_ADDR PciAddress;
AMD_CONFIG_PARAMS StdHeader;
- /* Enable MMIO on AMD CPU Address Map Controller */
-
- /* Start to set MMIO 0000A0000-0000BFFFF to Node0 Link0 */
+ /* Enable legacy video routing: D18F1xF4 VGA Enable */
+ PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0xF4);
+ PciData = 1;
+ LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
+
+ /* The platform BIOS needs to ensure the memory ranges of SB800 legacy
+ * devices (TPM, HPET, BIOS RAM, Watchdog Timer, I/O APIC and ACPI) are
+ * set to non-posted regions.
+ */
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0x84);
- PciData = 0x00000B00;
+ PciData = 0x00FEDF00; // last address before processor local APIC at FEE00000
+ PciData |= 1 << 7; // set NP (non-posted) bit
LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0x80);
- PciData = 0x00000A03;
- LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
-
- /* Set TOM-DFFFFFFF to Node0 Link0. */
+ PciData = (0xFED00000 >> 8) | 3; // lowest NP address is HPET at FED00000
+ LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
+
+ /* Map the remaining PCI hole as posted MMIO */
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0x8C);
- PciData = 0x00DFFF00;
+ PciData = 0x00FECF00; // last address before non-posted range
LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
LibAmdMsrRead (0xC001001A, &MsrReg, &StdHeader);
MsrReg = (MsrReg >> 8) | 3;
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0x88);
PciData = (UINT32)MsrReg;
LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
- /* Set E0000000-FFFFFFFF to Node0 Link0 with NP set. */
- PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0xBC);
- PciData = 0x00FFFF00 | 0x80;
- LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
- PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0xB8);
- PciData = (PCIE_BASE_ADDRESS >> 8) | 03;
- LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
- /* Start to set PCIIO 0000-FFFF to Node0 Link0 with ISA&VGA set. */
+
+ /* Send all IO (0000-FFFF) to southbridge. */
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0xC4);
PciData = 0x0000F000;
LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 0x18, 1, 0xC0);
- PciData = 0x00000013;
+ PciData = 0x00000003;
LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
Status = AGESA_SUCCESS;
return (UINT32)Status;