diff options
Diffstat (limited to 'DuetPkg/AcpiResetDxe/Reset.c')
| -rw-r--r-- | DuetPkg/AcpiResetDxe/Reset.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/DuetPkg/AcpiResetDxe/Reset.c b/DuetPkg/AcpiResetDxe/Reset.c new file mode 100644 index 0000000000..fe2d0a8da8 --- /dev/null +++ b/DuetPkg/AcpiResetDxe/Reset.c @@ -0,0 +1,194 @@ +/*++ @file
+ Reset Architectural Protocol implementation.
+
+Copyright (c) 2006 - 2010, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+--*/
+
+#include "Reset.h"
+
+/**
+ Use ACPI method to reset the sytem. If fail, use legacy 8042 method to reset the system
+
+ @param[in] AcpiDescription Global variable to record reset info
+
+**/
+VOID
+SystemReset (
+ IN EFI_ACPI_DESCRIPTION *AcpiDescription
+ )
+{
+ UINT8 Dev;
+ UINT8 Func;
+ UINT8 Register;
+
+ if ((AcpiDescription->RESET_REG.Address != 0) &&
+ ((AcpiDescription->RESET_REG.AddressSpaceId == EFI_ACPI_3_0_SYSTEM_IO) ||
+ (AcpiDescription->RESET_REG.AddressSpaceId == EFI_ACPI_3_0_SYSTEM_MEMORY) ||
+ (AcpiDescription->RESET_REG.AddressSpaceId == EFI_ACPI_3_0_PCI_CONFIGURATION_SPACE))) {
+ //
+ // Use ACPI System Reset
+ //
+ switch (AcpiDescription->RESET_REG.AddressSpaceId) {
+ case EFI_ACPI_3_0_SYSTEM_IO:
+ IoWrite8 ((UINTN) AcpiDescription->RESET_REG.Address, AcpiDescription->RESET_VALUE);
+ break;
+ case EFI_ACPI_3_0_SYSTEM_MEMORY:
+ MmioWrite8 ((UINTN) AcpiDescription->RESET_REG.Address, AcpiDescription->RESET_VALUE);
+ break;
+ case EFI_ACPI_3_0_PCI_CONFIGURATION_SPACE:
+ Register = (UINT8) AcpiDescription->RESET_REG.Address;
+ Func = (UINT8) (RShiftU64 (AcpiDescription->RESET_REG.Address, 16) & 0x7);
+ Dev = (UINT8) (RShiftU64 (AcpiDescription->RESET_REG.Address, 32) & 0x1F);
+ PciWrite8 (PCI_LIB_ADDRESS (0, Dev, Func, Register), AcpiDescription->RESET_VALUE);
+ break;
+ }
+ }
+
+ //
+ // If system comes here, means ACPI reset fail, do Legacy System Reset, assume 8042 available
+ //
+ Register = 0xfe;
+ IoWrite8 (0x64, Register);
+
+ //
+ // System should reset now
+ //
+
+ return ;
+}
+
+/**
+ Use ACPI method to shutdown the sytem
+
+ @param[in] AcpiDescription Global variable to record reset info
+
+ @retval EFI_UNSUPPORTED Shutdown fails
+
+**/
+EFI_STATUS
+SystemShutdown (
+ IN EFI_ACPI_DESCRIPTION *AcpiDescription
+ )
+{
+ UINT16 Value;
+
+ //
+ // 1. Write SLP_TYPa
+ //
+ if ((AcpiDescription->PM1a_CNT_BLK.Address != 0) && (AcpiDescription->SLP_TYPa != 0)) {
+ switch (AcpiDescription->PM1a_CNT_BLK.AddressSpaceId) {
+ case EFI_ACPI_3_0_SYSTEM_IO:
+ Value = IoRead16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address);
+ Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPa << 10);
+ IoWrite16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address, Value);
+ break;
+ case EFI_ACPI_3_0_SYSTEM_MEMORY:
+ Value = MmioRead16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address);
+ Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPa << 10);
+ MmioWrite16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address, Value);
+ break;
+ }
+ }
+
+ //
+ // 2. Write SLP_TYPb
+ //
+ if ((AcpiDescription->PM1b_CNT_BLK.Address != 0) && (AcpiDescription->SLP_TYPb != 0)) {
+ switch (AcpiDescription->PM1b_CNT_BLK.AddressSpaceId) {
+ case EFI_ACPI_3_0_SYSTEM_IO:
+ Value = IoRead16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address);
+ Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPb << 10);
+ IoWrite16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address, Value);
+ break;
+ case EFI_ACPI_3_0_SYSTEM_MEMORY:
+ Value = MmioRead16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address);
+ Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPb << 10);
+ MmioWrite16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address, Value);
+ break;
+ }
+ }
+
+ //
+ // Done, if code runs here, mean not shutdown correctly
+ //
+ return EFI_UNSUPPORTED;
+}
+
+/**
+ Reset the system.
+
+ @param[in] ResetType Warm or cold
+ @param[in] ResetStatus Possible cause of reset
+ @param[in] DataSize Size of ResetData in bytes
+ @param[in] ResetData Optional Unicode string
+ @param[in] AcpiDescription Global variable to record reset info
+
+**/
+VOID
+EFIAPI
+AcpiResetSystem (
+ IN EFI_RESET_TYPE ResetType,
+ IN EFI_STATUS ResetStatus,
+ IN UINTN DataSize,
+ IN CHAR16 *ResetData, OPTIONAL
+ IN EFI_ACPI_DESCRIPTION *AcpiDescription
+ )
+{
+ EFI_STATUS Status;
+
+ switch (ResetType) {
+ case EfiResetWarm:
+ case EfiResetCold:
+ SystemReset (AcpiDescription);
+ break;
+
+ case EfiResetShutdown:
+ Status = SystemShutdown (AcpiDescription);
+ if (EFI_ERROR (Status)) {
+ SystemReset (AcpiDescription);
+ }
+ break;
+
+ default:
+ return ;
+ }
+
+ //
+ // Given we should have reset getting here would be bad
+ //
+ ASSERT (FALSE);
+}
+
+BOOLEAN
+GetAcpiDescription (
+ IN EFI_ACPI_DESCRIPTION *AcpiDescription
+ )
+{
+ EFI_HOB_GUID_TYPE *HobAcpiDescription;
+ //
+ // Get AcpiDescription Hob
+ //
+ HobAcpiDescription = GetFirstGuidHob (&gEfiAcpiDescriptionGuid);
+ if (HobAcpiDescription == NULL) {
+ return FALSE;
+ }
+
+ //
+ // Copy it to Runtime Memory
+ //
+ ASSERT (sizeof (EFI_ACPI_DESCRIPTION) == GET_GUID_HOB_DATA_SIZE (HobAcpiDescription));
+ CopyMem (AcpiDescription, GET_GUID_HOB_DATA (HobAcpiDescription), sizeof (EFI_ACPI_DESCRIPTION));
+
+ DEBUG ((EFI_D_ERROR, "ACPI Reset Base - %lx\n", AcpiDescription->RESET_REG.Address));
+ DEBUG ((EFI_D_ERROR, "ACPI Reset Value - %02x\n", (UINTN)AcpiDescription->RESET_VALUE));
+ DEBUG ((EFI_D_ERROR, "IAPC support - %x\n", (UINTN)(AcpiDescription->IAPC_BOOT_ARCH)));
+ return TRUE;
+}
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