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

UefiCpuPkg/MpInitLib: Add CPU_VOLATILE_REGISTERS & worker functions

Browse Source 
Add CPU_VOLATILE_REGISTERS definitions for CRx and DRx required to be restored
after APs received INIT IPI.

Add worker functions SaveVolatileRegisters()/RestoreVolatileRegisters() used to
save/restore CRx and DRx. It also check if Debugging Extensions supported or
not.

v5:
  1. Add comment block for structure CPU_VOLATILE_REGISTERS.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
This commit is contained in:
Jeff Fan
2016-07-20 23:47:59 +08:00
parent 03a1a92515
commit 68cb933071
2 changed files with 87 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
UefiCpuPkg/Library/MpInitLib/MpLib.h
View File

@@ -65,6 +65,21 @@ typedef enum {
CpuStateDisabled
} CPU_STATE;
//
// CPU volatile registers around INIT-SIPI-SIPI
//
typedef struct {
UINTN Cr0;
UINTN Cr3;
UINTN Cr4;
UINTN Dr0;
UINTN Dr1;
UINTN Dr2;
UINTN Dr3;
UINTN Dr6;
UINTN Dr7;
} CPU_VOLATILE_REGISTERS;
//
// AP related data
//
@@ -78,6 +93,7 @@ typedef struct {
UINT32 Health;
BOOLEAN CpuHealthy;
volatile CPU_STATE State;
CPU_VOLATILE_REGISTERS VolatileRegisters;
BOOLEAN Waiting;
BOOLEAN *Finished;
UINT64 ExpectedTime;