/**
Get information about the VExpress platform the firmware is running on.
@param[out] Platform Address where the pointer to the platform information
(type ARM_VEXPRESS_PLATFORM*) should be stored.
The returned pointer does not point to an allocated
memory area.
@retval EFI_SUCCESS The platform information was returned.
@retval EFI_NOT_FOUND The platform was not recognised.
**/
EFI_STATUS
ArmVExpressGetPlatform (
OUT CONST ARM_VEXPRESS_PLATFORM** Platform
)
{
UINT32 SysId;
UINTN CpuType;
EFI_STATUS Status;
UINTN CoreCount;
ASSERT (Platform != NULL);
CpuType = 0;
Status = EFI_NOT_FOUND;
*Platform = NULL;
SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
if (SysId == ARM_RTSM_SYS_ID) {
// Get the Cortex-A version
CpuType = (ArmReadMidr () >> 4) & ARM_CPU_TYPE_MASK;
if (CpuType == ARM_CPU_TYPE_A9) {
Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A9x4, Platform);
} else if (CpuType == ARM_CPU_TYPE_A15) {
CoreCount = ArmGetCpuCountPerCluster ();
if (CoreCount == 1) {
Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x1, Platform);
} else if (CoreCount == 2) {
Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x2, Platform);
} else if (CoreCount == 4) {
Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x4, Platform);
}
}
}
EFI_STATUS
PrePeiCoreGetMpCoreInfo (
OUT UINTN *CoreCount,
OUT ARM_CORE_INFO **ArmCoreTable
)
{
UINT32 ProcType;
ProcType = MmioRead32 (ARM_VE_SYS_PROCID0_REG) & ARM_VE_SYS_PROC_ID_MASK;
if ((ProcType == ARM_VE_SYS_PROC_ID_CORTEX_A9) || (ProcType == ARM_VE_SYS_PROC_ID_CORTEX_A15)) {
// Only support one cluster on all but ARMv8 FVP platform. FVP still uses CortexA9 ID.
*CoreCount = ArmGetCpuCountPerCluster ();
*ArmCoreTable = mVersatileExpressMpCoreInfoTable;
return EFI_SUCCESS;
} else {
return EFI_UNSUPPORTED;
}
}
