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target/riscv: Add Smdbltrp CSRs handling

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Add `ext_smdbltrp`in RISCVCPUConfig and implement MSTATUS.MDT behavior.
Also set MDT to 1 at reset according to the specification.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20250110125441.3208676-7-cleger@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Clément Léger 2025-01-10 13:54:37 +01:00 • committed by Alistair Francis
parent b0edcbe755
commit d2e92f1c6d
4 changed files with 18 additions and 0 deletions
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1
target/riscv/cpu_bits.h
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@ -559,6 +559,7 @@
#define MSTATUS_MPELP 0x020000000000 /* zicfilp */
#define MSTATUS_GVA 0x4000000000ULL
#define MSTATUS_MPV 0x8000000000ULL
#define MSTATUS_MDT 0x40000000000ULL /* Smdbltrp extension */
#define MSTATUS64_UXL 0x0000000300000000ULL
#define MSTATUS64_SXL 0x0000000C00000000ULL