include: Add defines for [m|h|s]envcfg CSRs

The latest RISC-V privileged specification introduces xenvcfg CSRs
to enable/disable certain features/extensions for lower privilege
modes. This patch adds defines for these new [m|h|s]envcfg CSRs.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Xiang W <wxjstz@126.com>

include/sbi/riscv_encoding.h

@@ -203,6 +203,22 @@
 
 #define MHPMEVENT_SSCOF_MASK		_ULL(0xFFFF000000000000)
 
+#if __riscv_xlen > 32
+#define ENVCFG_STCE			(_ULL(1) << 63)
+#define ENVCFG_PBMTE			(_ULL(1) << 62)
+#else
+#define ENVCFGH_STCE			(_UL(1) << 31)
+#define ENVCFGH_PBMTE			(_UL(1) << 30)
+#endif
+#define ENVCFG_CBZE			(_UL(1) << 7)
+#define ENVCFG_CBCFE			(_UL(1) << 6)
+#define ENVCFG_CBIE_SHIFT		4
+#define ENVCFG_CBIE			(_UL(0x3) << ENVCFG_CBIE_SHIFT)
+#define ENVCFG_CBIE_ILL			_UL(0x0)
+#define ENVCFG_CBIE_FLUSH		_UL(0x1)
+#define ENVCFG_CBIE_INV			_UL(0x3)
+#define ENVCFG_FIOM			_UL(0x1)
+
 /* ===== User-level CSRs ===== */
 
 /* User Trap Setup (N-extension) */
@@ -298,6 +314,9 @@
 #define CSR_STVEC			0x105
 #define CSR_SCOUNTEREN			0x106
 
+/* Supervisor Configuration */
+#define CSR_SENVCFG			0x10a
+
 /* Supervisor Trap Handling */
 #define CSR_SSCRATCH			0x140
 #define CSR_SEPC			0x141
@@ -336,6 +355,10 @@
 #define CSR_HCOUNTEREN			0x606
 #define CSR_HGEIE			0x607
 
+/* Hypervisor Configuration */
+#define CSR_HENVCFG			0x60a
+#define CSR_HENVCFGH			0x61a
+
 /* Hypervisor Trap Handling (H-extension) */
 #define CSR_HTVAL			0x643
 #define CSR_HIP				0x644
@@ -408,6 +431,10 @@
 #define CSR_MCOUNTEREN			0x306
 #define CSR_MSTATUSH			0x310
 
+/* Machine Configuration */
+#define CSR_MENVCFG			0x30a
+#define CSR_MENVCFGH			0x31a
+
 /* Machine Trap Handling */
 #define CSR_MSCRATCH			0x340
 #define CSR_MEPC			0x341