diff options
Diffstat (limited to 'machine/minit.c')
| -rw-r--r-- | machine/minit.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/machine/minit.c b/machine/minit.c index c519926..d35f9df 100644 --- a/machine/minit.c +++ b/machine/minit.c @@ -24,6 +24,19 @@ void* kernel_end; static void mstatus_init() { uintptr_t mstatus = 0; +#if __riscv_xlen == 32 + uint32_t mstatush = 0; +#endif + + // Set endianness +#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +#if __riscv_xlen == 32 + mstatush |= MSTATUSH_SBE | MSTATUSH_MBE; +#else + mstatus |= MSTATUS_SBE | MSTATUS_MBE; +#endif + mstatus |= MSTATUS_UBE; +#endif // Enable FPU if (supports_extension('F')) @@ -34,6 +47,9 @@ static void mstatus_init() mstatus |= MSTATUS_VS; write_csr(mstatus, mstatus); +#if __riscv_xlen == 32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + write_csr(0x310, mstatush); /* mstatush is not known to gas */ +#endif // Enable user/supervisor use of perf counters if (supports_extension('S')) |