target/riscv: rvv-1.0: add vcsr register
Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com> Signed-off-by: Frank Chang <frank.chang@sifive.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20211210075704.23951-10-frank.chang@sifive.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
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@ -60,9 +60,16 @@
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#define CSR_VSTART 0x008
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#define CSR_VXSAT 0x009
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#define CSR_VXRM 0x00a
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#define CSR_VCSR 0x00f
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#define CSR_VL 0xc20
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#define CSR_VTYPE 0xc21
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/* VCSR fields */
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#define VCSR_VXSAT_SHIFT 0
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#define VCSR_VXSAT (0x1 << VCSR_VXSAT_SHIFT)
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#define VCSR_VXRM_SHIFT 1
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#define VCSR_VXRM (0x3 << VCSR_VXRM_SHIFT)
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/* User Timers and Counters */
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#define CSR_CYCLE 0xc00
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#define CSR_TIME 0xc01
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@ -336,6 +336,22 @@ static RISCVException write_vstart(CPURISCVState *env, int csrno,
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return RISCV_EXCP_NONE;
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}
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static int read_vcsr(CPURISCVState *env, int csrno, target_ulong *val)
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{
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*val = (env->vxrm << VCSR_VXRM_SHIFT) | (env->vxsat << VCSR_VXSAT_SHIFT);
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return RISCV_EXCP_NONE;
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}
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static int write_vcsr(CPURISCVState *env, int csrno, target_ulong val)
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{
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#if !defined(CONFIG_USER_ONLY)
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env->mstatus |= MSTATUS_VS;
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#endif
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env->vxrm = (val & VCSR_VXRM) >> VCSR_VXRM_SHIFT;
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env->vxsat = (val & VCSR_VXSAT) >> VCSR_VXSAT_SHIFT;
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return RISCV_EXCP_NONE;
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}
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/* User Timers and Counters */
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static RISCVException read_instret(CPURISCVState *env, int csrno,
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target_ulong *val)
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@ -1816,6 +1832,7 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
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[CSR_VSTART] = { "vstart", vs, read_vstart, write_vstart },
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[CSR_VXSAT] = { "vxsat", vs, read_vxsat, write_vxsat },
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[CSR_VXRM] = { "vxrm", vs, read_vxrm, write_vxrm },
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[CSR_VCSR] = { "vcsr", vs, read_vcsr, write_vcsr },
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[CSR_VL] = { "vl", vs, read_vl },
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[CSR_VTYPE] = { "vtype", vs, read_vtype },
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/* User Timers and Counters */
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