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authorniruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524>2010-03-11 09:33:40 +0000
committerniruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524>2010-03-11 09:33:40 +0000
commit4903c013bcdb61a487cbf72c0ad784ba3a1b18f9 (patch)
treea58017422006abc02a2ab6619cdd46c496f60e08 /DuetPkg
parente8c23923dad746e8cb365bf1f89c8552e27a6c11 (diff)
downloadedk2-platforms-4903c013bcdb61a487cbf72c0ad784ba3a1b18f9.tar.xz
Change the PM Timer RegisterBitWidth according to the Flags
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10231 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'DuetPkg')
-rw-r--r--DuetPkg/DxeIpl/LegacyTable.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/DuetPkg/DxeIpl/LegacyTable.c b/DuetPkg/DxeIpl/LegacyTable.c
index 539cf25732..9232414d6d 100644
--- a/DuetPkg/DxeIpl/LegacyTable.c
+++ b/DuetPkg/DxeIpl/LegacyTable.c
@@ -316,9 +316,17 @@ PrepareFadtTable (
if (AcpiDescription->PM_TMR_BLK.Address == 0) {
AcpiDescription->PM_TMR_BLK.Address = Fadt->PmTmrBlk;
AcpiDescription->PM_TMR_BLK.AddressSpaceId = EFI_ACPI_3_0_SYSTEM_IO;
- AcpiDescription->PM_TMR_BLK.RegisterBitWidth = (UINT8) ((AcpiDescription->TMR_VAL_EXT == 0) ? 24 : 32);
}
+ //
+ // It's possible that the PM_TMR_BLK.RegisterBitWidth is always 32,
+ // we need to set the correct RegisterBitWidth value according to the TMR_VAL_EXT
+ // A zero indicates TMR_VAL is implemented as a 24-bit value.
+ // A one indicates TMR_VAL is implemented as a 32-bit value
+ //
+ AcpiDescription->PM_TMR_BLK.RegisterBitWidth = (UINT8) ((AcpiDescription->TMR_VAL_EXT == 0) ? 24 : 32);
+
+
return ;
}