Define MIPS CSRs used for P8700 CPU.
Signed-off-by: Chao-ying Fu <cfu@mips.com>
Signed-off-by: Djordje Todorovic <djordje.todorovic@htecgroup.com>
---
target/riscv/cpu.c | 1 +
target/riscv/cpu.h | 7 ++
target/riscv/meson.build | 1 +
target/riscv/mips_csr.c | 226 +++++++++++++++++++++++++++++++++++++++
4 files changed, 235 insertions(+)
create mode 100644 target/riscv/mips_csr.c
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 029e2c7929..d22c1baf09 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -530,6 +530,7 @@ static void rv64_mips_p8700_cpu_init(Object *obj)
env->priv_ver = PRIV_VERSION_1_12_0;
#ifndef CONFIG_USER_ONLY
set_satp_mode_max_supported(RISCV_CPU(obj), VM_1_10_SV48);
+ mips_register_custom_csrs(cpu);
#endif
/* inherited from parent obj via riscv_cpu_init() */
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 6d0acbce80..f403a743b2 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -500,6 +500,10 @@ struct CPUArchState {
target_ulong rnmip;
uint64_t rnmi_irqvec;
uint64_t rnmi_excpvec;
+
+ uint64_t mipstvec; /* MIPS tvec register */
+ uint64_t mipsconfig[12]; /* MIPS config register */
+ uint64_t mipspmacfg[15]; /* MIPS pmacfg register */
};
/*
@@ -944,5 +948,8 @@ const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
/* Implemented in th_csr.c */
void th_register_custom_csrs(RISCVCPU *cpu);
+/* Implemented in mips_csr.c */
+void mips_register_custom_csrs(RISCVCPU *cpu);
+
const char *priv_spec_to_str(int priv_version);
#endif /* RISCV_CPU_H */
diff --git a/target/riscv/meson.build b/target/riscv/meson.build
index a4bd61e52a..fbb6c8fb45 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -32,6 +32,7 @@ riscv_system_ss.add(files(
'debug.c',
'monitor.c',
'machine.c',
+ 'mips_csr.c',
'pmu.c',
'th_csr.c',
'time_helper.c',
diff --git a/target/riscv/mips_csr.c b/target/riscv/mips_csr.c
new file mode 100644
index 0000000000..b655798cb4
--- /dev/null
+++ b/target/riscv/mips_csr.c
@@ -0,0 +1,226 @@
+/*
+ * MIPS-specific CSRs.
+ *
+ * Copyright (c) 2025 MIPS
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "cpu_vendorid.h"
+
+/* MIPS CSR */
+#define CSR_MIPSTVEC 0x7c0
+#define CSR_MIPSCONFIG0 0x7d0
+#define CSR_MIPSCONFIG1 0x7d1
+#define CSR_MIPSCONFIG2 0x7d2
+#define CSR_MIPSCONFIG3 0x7d3
+#define CSR_MIPSCONFIG4 0x7d4
+#define CSR_MIPSCONFIG5 0x7d5
+#define CSR_MIPSCONFIG6 0x7d6
+#define CSR_MIPSCONFIG7 0x7d7
+#define CSR_MIPSCONFIG8 0x7d8
+#define CSR_MIPSCONFIG9 0x7d9
+#define CSR_MIPSCONFIG10 0x7da
+#define CSR_MIPSCONFIG11 0x7db
+#define CSR_MIPSPMACFG0 0x7e0
+#define CSR_MIPSPMACFG1 0x7e1
+#define CSR_MIPSPMACFG2 0x7e2
+#define CSR_MIPSPMACFG3 0x7e3
+#define CSR_MIPSPMACFG4 0x7e4
+#define CSR_MIPSPMACFG5 0x7e5
+#define CSR_MIPSPMACFG6 0x7e6
+#define CSR_MIPSPMACFG7 0x7e7
+#define CSR_MIPSPMACFG8 0x7e8
+#define CSR_MIPSPMACFG9 0x7e9
+#define CSR_MIPSPMACFG10 0x7ea
+#define CSR_MIPSPMACFG11 0x7eb
+#define CSR_MIPSPMACFG12 0x7ec
+#define CSR_MIPSPMACFG13 0x7ed
+#define CSR_MIPSPMACFG14 0x7ee
+#define CSR_MIPSPMACFG15 0x7ef
+
+static RISCVException any(CPURISCVState *env, int csrno)
+{
+ return RISCV_EXCP_NONE;
+}
+
+static int read_mipstvec(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->mipstvec;
+ return RISCV_EXCP_NONE;
+}
+
+static int write_mipstvec(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->mipstvec = val;
+ return RISCV_EXCP_NONE;
+}
+
+static int read_mipsconfig(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->mipsconfig[csrno - CSR_MIPSCONFIG0];
+ return RISCV_EXCP_NONE;
+}
+
+static int write_mipsconfig(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->mipsconfig[csrno - CSR_MIPSCONFIG0] = val;
+ return RISCV_EXCP_NONE;
+}
+
+static int read_mipspmacfg(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = env->mipspmacfg[csrno - CSR_MIPSPMACFG0];
+ return RISCV_EXCP_NONE;
+}
+
+static int write_mipspmacfg(CPURISCVState *env, int csrno, target_ulong val)
+{
+ env->mipspmacfg[csrno - CSR_MIPSPMACFG0] = val;
+ return RISCV_EXCP_NONE;
+}
+
+typedef struct {
+ int csrno;
+ riscv_csr_operations csr_ops;
+} riscv_csr;
+
+static riscv_csr mips_csr_list[] = {
+ {
+ .csrno = CSR_MIPSTVEC,
+ .csr_ops = { "mipstvec", any, read_mipstvec, write_mipstvec }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG0,
+ .csr_ops = { "mipsconfig0", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG1,
+ .csr_ops = { "mipsconfig1", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG2,
+ .csr_ops = { "mipsconfig2", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG3,
+ .csr_ops = { "mipsconfig3", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG4,
+ .csr_ops = { "mipsconfig4", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG5,
+ .csr_ops = { "mipsconfig5", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG6,
+ .csr_ops = { "mipsconfig6", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG7,
+ .csr_ops = { "mipsconfig7", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG8,
+ .csr_ops = { "mipsconfig8", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG9,
+ .csr_ops = { "mipsconfig9", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG10,
+ .csr_ops = { "mipsconfig10", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSCONFIG11,
+ .csr_ops = { "mipsconfig11", any, read_mipsconfig, write_mipsconfig }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG0,
+ .csr_ops = { "mipspmacfg0", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG1,
+ .csr_ops = { "mipspmacfg1", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG2,
+ .csr_ops = { "mipspmacfg2", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG3,
+ .csr_ops = { "mipspmacfg3", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG4,
+ .csr_ops = { "mipspmacfg4", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG5,
+ .csr_ops = { "mipspmacfg5", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG6,
+ .csr_ops = { "mipspmacfg6", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG7,
+ .csr_ops = { "mipspmacfg7", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG8,
+ .csr_ops = { "mipspmacfg8", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG9,
+ .csr_ops = { "mipspmacfg9", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG10,
+ .csr_ops = { "mipspmacfg10", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG11,
+ .csr_ops = { "mipspmacfg11", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG12,
+ .csr_ops = { "mipspmacfg12", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG13,
+ .csr_ops = { "mipspmacfg13", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG14,
+ .csr_ops = { "mipspmacfg14", any, read_mipspmacfg, write_mipspmacfg }
+ },
+ {
+ .csrno = CSR_MIPSPMACFG15,
+ .csr_ops = { "mipspmacfg15", any, read_mipspmacfg, write_mipspmacfg }
+ },
+};
+
+void mips_register_custom_csrs(RISCVCPU *cpu)
+{
+ for (size_t i = 0; i < ARRAY_SIZE(mips_csr_list); i++) {
+ int csrno = mips_csr_list[i].csrno;
+ riscv_csr_operations *csr_ops = &mips_csr_list[i].csr_ops;
+ riscv_set_csr_ops(csrno, csr_ops);
+ }
+}
--
2.34.1© 2016 - 2025 Red Hat, Inc.