8.4.7.1.11. _CPC 实现示例
本示例展示了通过 PCC 接口在 PCC 子空间 2 中实现 _CPC 接口的双处理器实现。该实现使用寄存器来描述处理器的能力，并且不支持最小性能、最大性能或时间窗口寄存器。
Processor (\_SB.CPU0, 1, 0, 0)
{
Name(_CPC, Package()
{
21, // NumEntries
2, // Revision
ResourceTemplate(){Register(PCC, 32, 0, 0x120, 2)},
// Highest Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x124, 2)},
// Nominal Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x128, 2)},
// Lowest Nonlinear Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x12C, 2)},
// Lowest Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x130, 2)},
// Guaranteed Performance Register
ResourceTemplate(){Register(PCC, 32, 0, 0x110, 2)},
// Desired Performance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Minimum Performance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Maximum Performance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Performance Reduction Tolerance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Time Window Register
ResourceTemplate(){Register(PCC, 8, 0, 0x11B, 2)},
// Counter Wraparound Time
ResourceTemplate(){Register(PCC, 32, 0, 0x114, 2)},
// Reference Performance Counter Register
ResourceTemplate(){Register(PCC, 32, 0, 0x116, 2)},
// Delivered Performance Counter Register
ResourceTemplate(){Register(PCC, 8, 0, 0x11A, 2)},
// Performance Limited Register
ResourceTemplate(){Register(PCC, 1, 0, 0x100, 2)},
// CPPC Enable Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Autonomous Selection Enable
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Autonomous Activity Window Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Energy Performance Preference Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)}
// Reference Performance
})
}
Processor (\_SB.CPU1, 2, 0, 0)
{
Name(_CPC, Package()
{
21, // NumEntries
2, // Revision
ResourceTemplate(){Register(PCC, 32, 0, 0x220, 2)},
// Highest Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x224, 2)},
// Nominal Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x228, 2)},
// Lowest Nonlinear Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x22C, 2)},
// Lowest Performance
ResourceTemplate(){Register(PCC, 32, 0, 0x230, 2)},
// Guaranteed Performance Register
ResourceTemplate(){Register(PCC, 32, 0, 0x210, 2)},
// Desired Performance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Minimum Performance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Maximum Performance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Performance Reduction Tolerance Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Time Window Register
ResourceTemplate(){Register(PCC, 8, 0, 0x21B, 2)},
// Counter Wraparound Time
ResourceTemplate(){Register(PCC, 32, 0, 0x214, 2)},
// Reference Performance Counter Register
ResourceTemplate(){Register(PCC, 32, 0, 0x216, 2)},
// Delivered Performance Counter Register
ResourceTemplate(){Register(PCC, 8, 0, 0x21A, 2)},
// Performance Limited Register
ResourceTemplate(){Register(PCC, 1, 0, 0x200, 2)},
// CPPC Enable Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Autonomous Selection Enable
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Autonomous Activity Window Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)},
// Energy Performance Preference Register
ResourceTemplate(){Register(SystemMemory, 0, 0, 0, 0)}
// Reference Performance
})