[RFC PATCH v2 1/4] include: Add defines for SBI CPPC extension

[Xiang W]

在 2023-03-23星期四的 14:33 +0530，Sunil V L写道：
> Add SBI CPPC extension related defines to the
> SBI ecall interface header.
> 
> Signed-off-by: Sunil V L <sunilvl at ventanamicro.com>
> Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
> ---
>  include/sbi/sbi_ecall_interface.h | 34 +++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/include/sbi/sbi_ecall_interface.h b/include/sbi/sbi_ecall_interface.h
> index 4597358..dee2dd9 100644
> --- a/include/sbi/sbi_ecall_interface.h
> +++ b/include/sbi/sbi_ecall_interface.h
> @@ -31,6 +31,7 @@
>  #define SBI_EXT_PMU                            0x504D55
>  #define SBI_EXT_DBCN                           0x4442434E
>  #define SBI_EXT_SUSP                           0x53555350
> +#define SBI_EXT_CPPC                           0x43505043
>  
>  /* SBI function IDs for BASE extension*/
>  #define SBI_EXT_BASE_GET_SPEC_VERSION          0x0
> @@ -256,6 +257,39 @@ enum sbi_pmu_ctr_type {
>  #define SBI_SUSP_SLEEP_TYPE_LAST               SBI_SUSP_SLEEP_TYPE_SUSPEND
>  #define SBI_SUSP_PLATFORM_SLEEP_START          0x80000000
>  
> +/* SBI function IDs for CPPC extension */
> +#define SBI_EXT_CPPC_PROBE                     0x0
> +#define SBI_EXT_CPPC_READ                      0x1
> +#define SBI_EXT_CPPC_READ_HI                   0x2
> +#define SBI_EXT_CPPC_WRITE                     0x3

The FID is specified in the documentation:
https://docs.google.com/document/d/16FLCZtW_JVrN7fnTivHRLH2E7hGdRjMfzDWzsvPRLEc

sbi_cppc_read    0
sbi_cppc_read_hi 1
sbi_cppc_write   2

We need to modify SBI_EXT_CPPC_PROBE to 0x3

Regards,
Xiang W
> +
> +enum sbi_cppc_reg_id {
> +       SBI_CPPC_HIGHEST_PERF           = 0x00000000,
> +       SBI_CPPC_NOMINAL_PERF           = 0x00000001,
> +       SBI_CPPC_LOW_NON_LINEAR_PERF    = 0x00000002,
> +       SBI_CPPC_LOWEST_PERF            = 0x00000003,
> +       SBI_CPPC_GUARANTEED_PERF        = 0x00000004,
> +       SBI_CPPC_DESIRED_PERF           = 0x00000005,
> +       SBI_CPPC_MIN_PERF               = 0x00000006,
> +       SBI_CPPC_MAX_PERF               = 0x00000007,
> +       SBI_CPPC_PERF_REDUC_TOLERANCE   = 0x00000008,
> +       SBI_CPPC_TIME_WINDOW            = 0x00000009,
> +       SBI_CPPC_CTR_WRAP_TIME          = 0x0000000A,
> +       SBI_CPPC_REFERENCE_CTR          = 0x0000000B,
> +       SBI_CPPC_DELIVERED_CTR          = 0x0000000C,
> +       SBI_CPPC_PERF_LIMITED           = 0x0000000D,
> +       SBI_CPPC_ENABLE                 = 0x0000000E,
> +       SBI_CPPC_AUTO_SEL_ENABLE        = 0x0000000F,
> +       SBI_CPPC_AUTO_ACT_WINDOW        = 0x00000010,
> +       SBI_CPPC_ENERGY_PERF_PREFERENCE = 0x00000011,
> +       SBI_CPPC_REFERENCE_PERF         = 0x00000012,
> +       SBI_CPPC_LOWEST_FREQ            = 0x00000013,
> +       SBI_CPPC_NOMINAL_FREQ           = 0x00000014,
> +       SBI_CPPC_ACPI_LAST              = SBI_CPPC_NOMINAL_FREQ,
> +       SBI_CPPC_TRANSITION_LATENCY     = 0x80000000,
> +       SBI_CPPC_NON_ACPI_LAST          = SBI_CPPC_TRANSITION_LATENCY,
> +};
> +
>  /* SBI base specification related macros */
>  #define SBI_SPEC_VERSION_MAJOR_OFFSET          24
>  #define SBI_SPEC_VERSION_MAJOR_MASK            0x7f
> -- 
> 2.34.1
> 
>