sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

DynamicTablesPkg: AML code generation to add an _LPI state

Browse Source 
Add AmlAddLpiState() to generates AML code to add an _LPI state
to an _LPI object created using AmlCreateLpiNode().

AmlAddLpiState increments the count of LPI states in the LPI
node by one, and adds the following package:
  Package() {
    MinResidency,
    WorstCaseWakeLatency,
    Flags,
    ArchFlags,
    ResCntFreq,
    EnableParentState,
    (GenericRegisterDescriptor != NULL) ?           // Entry method. If a
      ResourceTemplate(GenericRegisterDescriptor) : // Register is given,
      Integer,                                      // use it. Use the
                                                    // Integer otherwise
    ResourceTemplate() {                            // NULL Residency
      Register (SystemMemory, 0, 0, 0, 0)           // Counter
    },
    ResourceTemplate() {                            // NULL Usage Counter
      Register (SystemMemory, 0, 0, 0, 0)
    },
    ""                                              // NULL State Name
  },

Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
This commit is contained in:
Pierre Gondois
2021-10-08 15:46:30 +01:00
committed by mergify[bot]
parent 018a962d92
commit a5e36ad9bc
2 changed files with 530 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
View File

@@ -716,6 +716,77 @@ AmlCreateLpiNode (
OUT AML_OBJECT_NODE_HANDLE * NewLpiNode OPTIONAL
);
/** Add an _LPI state to a LPI node created using AmlCreateLpiNode ().
AmlAddLpiState () increments the Count of LPI states in the LPI node by one,
and adds the following package:
Package() {
MinResidency,
WorstCaseWakeLatency,
Flags,
ArchFlags,
ResCntFreq,
EnableParentState,
(GenericRegisterDescriptor != NULL) ? // Entry method. If a
ResourceTemplate(GenericRegisterDescriptor) : // Register is given,
Integer, // use it. Use the
// Integer otherwise.
ResourceTemplate() { // NULL Residency Counter
Register (SystemMemory, 0, 0, 0, 0)
},
ResourceTemplate() { // NULL Usage Counter
Register (SystemMemory, 0, 0, 0, 0)
},
"" // NULL State Name
},
Cf ACPI 6.3 specification, s8.4.4 "Lower Power Idle States".
@ingroup CodeGenApis
@param [in] MinResidency Minimum Residency.
@param [in] WorstCaseWakeLatency Worst case wake-up latency.
@param [in] Flags Flags.
@param [in] ArchFlags Architectural flags.
@param [in] ResCntFreq Residency Counter Frequency.
@param [in] EnableParentState Enabled Parent State.
@param [in] GenericRegisterDescriptor Entry Method.
If not NULL, use this Register to
describe the entry method address.
@param [in] Integer Entry Method.
If GenericRegisterDescriptor is NULL,
take this value.
@param [in] ResidencyCounterRegister If not NULL, use it to populate the
residency counter register.
@param [in] UsageCounterRegister If not NULL, use it to populate the
usage counter register.
@param [in] StateName If not NULL, use it to populate the
state name.
@param [in] LpiNode Lpi node created with the function
AmlCreateLpiNode to which the new LPI
state is appended.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlAddLpiState (
IN UINT32 MinResidency,
IN UINT32 WorstCaseWakeLatency,
IN UINT32 Flags,
IN UINT32 ArchFlags,
IN UINT32 ResCntFreq,
IN UINT32 EnableParentState,
IN EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE * GenericRegisterDescriptor, OPTIONAL
IN UINT64 Integer, OPTIONAL
IN EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE * ResidencyCounterRegister, OPTIONAL
IN EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE * UsageCounterRegister, OPTIONAL
IN CHAR8 * StateName, OPTIONAL
IN AML_OBJECT_NODE_HANDLE LpiNode
);
// DEPRECATED APIS
#ifndef DISABLE_NEW_DEPRECATED_INTERFACES