Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
---
target/riscv/cpu_bits.h | 11 ++++
target/riscv/csr.c | 119 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 130 insertions(+)
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 204d9d9a79..78067901a2 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -191,6 +191,17 @@
#define HGATP_PPN SATP64_PPN
#endif
+/* Virtual CSRs */
+#define CSR_VSSTATUS 0x200
+#define CSR_VSIE 0x204
+#define CSR_VSTVEC 0x205
+#define CSR_VSSCRATCH 0x240
+#define CSR_VSEPC 0x241
+#define CSR_VSCAUSE 0x242
+#define CSR_VSTVAL 0x243
+#define CSR_VSIP 0x244
+#define CSR_VSATP 0x280
+
/* Physical Memory Protection */
#define CSR_PMPCFG0 0x3a0
#define CSR_PMPCFG1 0x3a1
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 388775d45a..e2e908fbc0 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -817,6 +817,115 @@ static int write_hgatp(CPURISCVState *env, int csrno,
target_ulong val)
return 0;
}
+/* Virtual CSR Registers */
+static int read_vsstatus(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vsstatus;
+ return 0;
+}
+
+static int write_vsstatus(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vsstatus = val;
+ return 0;
+}
+
+static int read_vsie(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vsie;
+ return 0;
+}
+
+static int write_vsie(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vsie = val;
+ return 0;
+}
+
+static int read_vstvec(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vstvec;
+ return 0;
+}
+
+static int write_vstvec(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vstvec = val;
+ return 0;
+}
+
+static int read_vsscratch(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vsscratch;
+ return 0;
+}
+
+static int write_vsscratch(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vsscratch = val;
+ return 0;
+}
+
+static int read_vsepc(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vsepc;
+ return 0;
+}
+
+static int write_vsepc(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vsepc = val;
+ return 0;
+}
+
+static int read_vscause(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vscause;
+ return 0;
+}
+
+static int write_vscause(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vscause = val;
+ return 0;
+}
+
+static int read_vstval(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vstval;
+ return 0;
+}
+
+static int write_vstval(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vstval = val;
+ return 0;
+}
+
+static int read_vsip(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = (target_ulong)atomic_read(&env->vsip);
+ return 0;
+}
+
+static int write_vsip(CPURISCVState *env, int csrno, target_ulong val)
+{
+ atomic_set(&env->vsip, val);
+ return 0;
+}
+
+static int read_vsatp(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->vsatp;
+ return 0;
+}
+
+static int write_vsatp(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->vsatp = val;
+ return 0;
+}
+
/* Physical Memory Protection */
static int read_pmpcfg(CPURISCVState *env, int csrno, target_ulong *val)
{
@@ -1018,6 +1127,16 @@ static riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
[CSR_HIDELEG] = { hmode, read_hideleg, write_hideleg
},
[CSR_HGATP] = { hmode, read_hgatp, write_hgatp
},
+ [CSR_VSSTATUS] = { hmode, read_vsstatus, write_vsstatus
},
+ [CSR_VSIE] = { hmode, read_vsie, write_vsie
},
+ [CSR_VSTVEC] = { hmode, read_vstvec, write_vstvec
},
+ [CSR_VSSCRATCH] = { hmode, read_vsscratch, write_vsscratch
},
+ [CSR_VSEPC] = { hmode, read_vsepc, write_vsepc
},
+ [CSR_VSCAUSE] = { hmode, read_vscause, write_vscause
},
+ [CSR_VSTVAL] = { hmode, read_vstval, write_vstval
},
+ [CSR_VSIP] = { hmode, read_vsip, write_vsip
},
+ [CSR_VSATP] = { hmode, read_vsatp, write_vsatp
},
+
/* Physical Memory Protection */
[CSR_PMPCFG0 ... CSR_PMPADDR9] = { pmp, read_pmpcfg, write_pmpcfg },
[CSR_PMPADDR0 ... CSR_PMPADDR15] = { pmp, read_pmpaddr, write_pmpaddr },
