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| author | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-03-10 01:07:03 -0800 |
|---|---|---|
| committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-03-10 01:08:31 -0800 |
| commit | d5278834830bdd2cb8586f25fe05ae917b0eb949 (patch) | |
| tree | bef4b4c1405dc56cb0a3e37711a7e858d2f2a95b /machine | |
| parent | 469c5f16a7ce5a913248367a420d43dc3518eb88 (diff) | |
| download | pk-d5278834830bdd2cb8586f25fe05ae917b0eb949.zip pk-d5278834830bdd2cb8586f25fe05ae917b0eb949.tar.gz pk-d5278834830bdd2cb8586f25fe05ae917b0eb949.tar.bz2 | |
Misc improvements
Diffstat (limited to 'machine')
| -rw-r--r-- | machine/emulation.c | 4 | ||||
| -rw-r--r-- | machine/minit.c | 10 |
2 files changed, 8 insertions, 6 deletions
diff --git a/machine/emulation.c b/machine/emulation.c index 5e3ca2e..dad86f9 100644 --- a/machine/emulation.c +++ b/machine/emulation.c @@ -61,7 +61,7 @@ void illegal_insn_trap(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc) " .word truly_illegal_insn\n" " .word truly_illegal_insn\n" " .word truly_illegal_insn\n" - " .word emulate_system\n" + " .word emulate_system_opcode\n" " .word truly_illegal_insn\n" " .word truly_illegal_insn\n" " .word truly_illegal_insn\n" @@ -153,7 +153,7 @@ static inline int emulate_write_csr(int num, uintptr_t value, uintptr_t mstatus) return -1; } -DECLARE_EMULATION_FUNC(emulate_system) +DECLARE_EMULATION_FUNC(emulate_system_opcode) { int rs1_num = (insn >> 15) & 0x1f; uintptr_t rs1_val = GET_RS1(insn, regs); diff --git a/machine/minit.c b/machine/minit.c index 4bc0f27..055fdb3 100644 --- a/machine/minit.c +++ b/machine/minit.c @@ -11,21 +11,23 @@ uintptr_t num_harts; static void mstatus_init() { + // Enable FPU and set VM mode uintptr_t ms = 0; ms = INSERT_FIELD(ms, MSTATUS_VM, VM_CHOICE); ms = INSERT_FIELD(ms, MSTATUS_FS, 1); write_csr(mstatus, ms); + // Make sure the hart actually supports the VM mode we want ms = read_csr(mstatus); assert(EXTRACT_FIELD(ms, MSTATUS_VM) == VM_CHOICE); - write_csr(mtimecmp, 0); - clear_csr(mip, MIP_MSIP); - write_csr(mie, -1); + // Enable user/supervisor use of perf counters write_csr(mucounteren, -1); write_csr(mscounteren, -1); + write_csr(mie, ~MIP_MTIP); // disable timer; enable other interrupts } +// send S-mode interrupts and most exceptions straight to S-mode static void delegate_traps() { uintptr_t interrupts = MIP_SSIP | MIP_STIP; @@ -89,7 +91,7 @@ static void hart_init() void init_first_hart() { hart_init(); - memset(HLS(), 0, sizeof(*HLS())); + hls_init(0, NULL); // this might get called again from parse_config_string parse_config_string(); memory_init(); boot_loader(); |