@@ -63,6 +63,7 @@
#define CSR_VCSR 0x00f
#define CSR_VL 0xc20
#define CSR_VTYPE 0xc21
+#define CSR_VLENB 0xc22
/* VCSR fields */
#define VCSR_VXSAT_SHIFT 0
@@ -285,6 +285,12 @@ static RISCVException read_vl(CPURISCVState *env, int csrno,
return RISCV_EXCP_NONE;
}
+static int read_vlenb(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env_archcpu(env)->cfg.vlen >> 3;
+ return RISCV_EXCP_NONE;
+}
+
static RISCVException read_vxrm(CPURISCVState *env, int csrno,
target_ulong *val)
{
@@ -1835,6 +1841,7 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
[CSR_VCSR] = { "vcsr", vs, read_vcsr, write_vcsr },
[CSR_VL] = { "vl", vs, read_vl },
[CSR_VTYPE] = { "vtype", vs, read_vtype },
+ [CSR_VLENB] = { "vlenb", vs, read_vlenb },
/* User Timers and Counters */
[CSR_CYCLE] = { "cycle", ctr, read_instret },
[CSR_INSTRET] = { "instret", ctr, read_instret },