diff options
Diffstat (limited to 'arch/riscv/kernel/head.S')
| -rw-r--r-- | arch/riscv/kernel/head.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 7ed1b22950fd..0a4e81b8dc79 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -138,9 +138,23 @@ secondary_start_common: la a0, swapper_pg_dir call relocate #endif + call setup_trap_vector tail smp_callin #endif /* CONFIG_SMP */ +.align 2 +setup_trap_vector: + /* Set trap vector to exception handler */ + la a0, handle_exception + csrw CSR_TVEC, a0 + + /* + * Set sup0 scratch register to 0, indicating to exception vector that + * we are presently executing in kernel. + */ + csrw CSR_SCRATCH, zero + ret + .Lsecondary_park: /* We lack SMP support or have too many harts, so park this hart */ wfi @@ -234,6 +248,7 @@ clear_bss_done: call relocate #endif /* CONFIG_MMU */ + call setup_trap_vector /* Restore C environment */ la tp, init_task sw zero, TASK_TI_CPU(tp) |