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| author | Marcus Comstedt <marcus@mc.pp.se> | 2020-10-21 18:51:01 +0200 |
|---|---|---|
| committer | Marcus Comstedt <marcus@mc.pp.se> | 2020-11-07 15:34:19 +0100 |
| commit | 212249e7c0d484fe69c953226ab7f4326427a73f (patch) | |
| tree | 8ef5bda164bb0417b68a3470033d3ed703a50e32 | |
| parent | 8e3bcb2eef7f195a9cd61f5b79c1e67a0c3c28ff (diff) | |
| download | spike-212249e7c0d484fe69c953226ab7f4326427a73f.zip spike-212249e7c0d484fe69c953226ab7f4326427a73f.tar.gz spike-212249e7c0d484fe69c953226ab7f4326427a73f.tar.bz2 | |
Allow fixed endianness to be observed through MBE/SBE/UBE
| -rw-r--r-- | riscv/encoding.h | 8 | ||||
| -rw-r--r-- | riscv/processor.cc | 12 | ||||
| -rw-r--r-- | riscv/sim.cc | 1 |
3 files changed, 18 insertions, 3 deletions
diff --git a/riscv/encoding.h b/riscv/encoding.h index fb1536e..219fee3 100644 --- a/riscv/encoding.h +++ b/riscv/encoding.h @@ -9,7 +9,7 @@ #define MSTATUS_MIE 0x00000008 #define MSTATUS_UPIE 0x00000010 #define MSTATUS_SPIE 0x00000020 -#define MSTATUS_HPIE 0x00000040 +#define MSTATUS_UBE 0x00000040 #define MSTATUS_MPIE 0x00000080 #define MSTATUS_SPP 0x00000100 #define MSTATUS_VS 0x00000600 @@ -25,14 +25,20 @@ #define MSTATUS32_SD 0x80000000 #define MSTATUS_UXL 0x0000000300000000 #define MSTATUS_SXL 0x0000000C00000000 +#define MSTATUS_SBE 0x0000001000000000 +#define MSTATUS_MBE 0x0000002000000000 #define MSTATUS_GVA 0x0000004000000000 #define MSTATUS_MPV 0x0000008000000000 #define MSTATUS64_SD 0x8000000000000000 +#define MSTATUSH_SBE 0x00000010 +#define MSTATUSH_MBE 0x00000020 + #define SSTATUS_UIE 0x00000001 #define SSTATUS_SIE 0x00000002 #define SSTATUS_UPIE 0x00000010 #define SSTATUS_SPIE 0x00000020 +#define SSTATUS_UBE 0x00000040 #define SSTATUS_SPP 0x00000100 #define SSTATUS_VS 0x00000600 #define SSTATUS_FS 0x00006000 diff --git a/riscv/processor.cc b/riscv/processor.cc index 564f1b3..b61bd33 100644 --- a/riscv/processor.cc +++ b/riscv/processor.cc @@ -446,6 +446,10 @@ void processor_t::enable_log_commits() void processor_t::reset() { state.reset(max_isa); +#ifdef RISCV_ENABLE_DUAL_ENDIAN + if (mmu->is_target_big_endian()) + state.mstatus |= MSTATUS_UBE | MSTATUS_SBE | MSTATUS_MBE; +#endif state.mideleg = supports_extension('H') ? MIDELEG_FORCED_MASK : 0; @@ -1411,8 +1415,8 @@ reg_t processor_t::get_csr(int which, insn_t insn, bool write, bool peek) ret(state.mcounteren); case CSR_MCOUNTINHIBIT: ret(0); case CSR_SSTATUS: { - reg_t mask = SSTATUS_SIE | SSTATUS_SPIE | SSTATUS_SPP | SSTATUS_FS - | (supports_extension('V') ? SSTATUS_VS : 0) + reg_t mask = SSTATUS_SIE | SSTATUS_SPIE | SSTATUS_UBE | SSTATUS_SPP + | SSTATUS_FS | (supports_extension('V') ? SSTATUS_VS : 0) | SSTATUS_XS | SSTATUS_SUM | SSTATUS_MXR | SSTATUS_UXL; reg_t sstatus = state.mstatus & mask; if ((sstatus & SSTATUS_FS) == SSTATUS_FS || @@ -1486,6 +1490,10 @@ reg_t processor_t::get_csr(int which, insn_t insn, bool write, bool peek) } } case CSR_MSTATUS: ret(state.mstatus); + case CSR_MSTATUSH: + if (xlen == 32) + ret((state.mstatus >> 32) & (MSTATUSH_SBE | MSTATUSH_MBE)); + break; case CSR_MIP: ret(state.mip); case CSR_MIE: ret(state.mie); case CSR_MEPC: ret(state.mepc & pc_alignment_mask()); diff --git a/riscv/sim.cc b/riscv/sim.cc index 6faa1ac..ddf1f2c 100644 --- a/riscv/sim.cc +++ b/riscv/sim.cc @@ -350,6 +350,7 @@ void sim_t::set_target_endianness(memif_endianness_t endianness) debug_mmu->set_target_big_endian(enable); for (size_t i = 0; i < procs.size(); i++) { procs[i]->get_mmu()->set_target_big_endian(enable); + procs[i]->reset(); } #else assert(endianness == memif_endianness_little); |