diff options
| author | Song Gao <gaosong@loongson.cn> | 2025-09-16 20:21:08 +0800 |
|---|---|---|
| committer | Song Gao <gaosong@loongson.cn> | 2025-09-28 17:31:04 +0800 |
| commit | ce47eaadbd6acb466095465049f8433459b022a8 (patch) | |
| tree | 2565b6b649bb209e9b8f5a0cb10f5e140a325e17 | |
| parent | c2396bfd4892091032a482118895a02ac87ab3e0 (diff) | |
| download | focaccia-qemu-ce47eaadbd6acb466095465049f8433459b022a8.tar.gz focaccia-qemu-ce47eaadbd6acb466095465049f8433459b022a8.zip | |
target/loongarch:Implement csrrd CSR_MSGIR register
implement the read-clear feature for CSR_MSGIR register. Reviewed-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn> Message-ID: <20250916122109.749813-11-gaosong@loongson.cn>
| -rw-r--r-- | target/loongarch/csr.c | 5 | ||||
| -rw-r--r-- | target/loongarch/tcg/csr_helper.c | 21 | ||||
| -rw-r--r-- | target/loongarch/tcg/helper.h | 1 | ||||
| -rw-r--r-- | target/loongarch/tcg/insn_trans/trans_privileged.c.inc | 1 |
4 files changed, 28 insertions, 0 deletions
diff --git a/target/loongarch/csr.c b/target/loongarch/csr.c index 7ea0a30450..f973780bba 100644 --- a/target/loongarch/csr.c +++ b/target/loongarch/csr.c @@ -97,6 +97,11 @@ static CSRInfo csr_info[] = { CSR_OFF(DBG), CSR_OFF(DERA), CSR_OFF(DSAVE), + CSR_OFF_ARRAY(MSGIS, 0), + CSR_OFF_ARRAY(MSGIS, 1), + CSR_OFF_ARRAY(MSGIS, 2), + CSR_OFF_ARRAY(MSGIS, 3), + CSR_OFF(MSGIR), }; CSRInfo *get_csr(unsigned int csr_num) diff --git a/target/loongarch/tcg/csr_helper.c b/target/loongarch/tcg/csr_helper.c index 0d99e2c92b..7bfe6c6c0c 100644 --- a/target/loongarch/tcg/csr_helper.c +++ b/target/loongarch/tcg/csr_helper.c @@ -73,6 +73,27 @@ target_ulong helper_csrrd_tval(CPULoongArchState *env) return cpu_loongarch_get_constant_timer_ticks(cpu); } +target_ulong helper_csrrd_msgir(CPULoongArchState *env) +{ + int irq, new; + + irq = find_first_bit((unsigned long *)env->CSR_MSGIS, 256); + if (irq < 256) { + clear_bit(irq, (unsigned long *)env->CSR_MSGIS); + new = find_first_bit((unsigned long *)env->CSR_MSGIS, 256); + if (new < 256) { + return irq; + } + + env->CSR_ESTAT = FIELD_DP64(env->CSR_ESTAT, CSR_ESTAT, MSGINT, 0); + } else { + /* bit 31 set 1 for no invalid irq */ + irq = BIT(31); + } + + return irq; +} + target_ulong helper_csrwr_estat(CPULoongArchState *env, target_ulong val) { int64_t old_v = env->CSR_ESTAT; diff --git a/target/loongarch/tcg/helper.h b/target/loongarch/tcg/helper.h index 1d5cb0198c..db57dbfc16 100644 --- a/target/loongarch/tcg/helper.h +++ b/target/loongarch/tcg/helper.h @@ -100,6 +100,7 @@ DEF_HELPER_1(rdtime_d, i64, env) DEF_HELPER_1(csrrd_pgd, i64, env) DEF_HELPER_1(csrrd_cpuid, i64, env) DEF_HELPER_1(csrrd_tval, i64, env) +DEF_HELPER_1(csrrd_msgir, i64, env) DEF_HELPER_2(csrwr_stlbps, i64, env, tl) DEF_HELPER_2(csrwr_estat, i64, env, tl) DEF_HELPER_2(csrwr_asid, i64, env, tl) diff --git a/target/loongarch/tcg/insn_trans/trans_privileged.c.inc b/target/loongarch/tcg/insn_trans/trans_privileged.c.inc index 34cfab8879..a407ab51b7 100644 --- a/target/loongarch/tcg/insn_trans/trans_privileged.c.inc +++ b/target/loongarch/tcg/insn_trans/trans_privileged.c.inc @@ -83,6 +83,7 @@ void loongarch_csr_translate_init(void) SET_CSR_FUNC(TCFG, NULL, gen_helper_csrwr_tcfg); SET_CSR_FUNC(TVAL, gen_helper_csrrd_tval, NULL); SET_CSR_FUNC(TICLR, NULL, gen_helper_csrwr_ticlr); + SET_CSR_FUNC(MSGIR, gen_helper_csrrd_msgir, NULL); } #undef SET_CSR_FUNC |