diff options
Diffstat (limited to 'v/entry.S')
| -rw-r--r-- | v/entry.S | 30 |
1 files changed, 12 insertions, 18 deletions
@@ -13,30 +13,25 @@ #define STACK_TOP (_end + 131072) .section ".text.init","ax",@progbits - .align 6 -entry_from_user: - mrts - .align 6 -entry_from_supervisor: - csrr t0, mcause - addi t0, t0, -CAUSE_SUPERVISOR_ECALL - beqz t0, handle_tohost - j wtf +reset_vector: + j handle_reset - .align 6 -entry_from_hypervisor: + /* NMI vector */ +nmi_vector: j wtf - .align 6 -entry_from_machine: +trap_vector: + # we can safely clobber caller-saved registers here, because we were + # either invoked via do_tohost or we are about to bail out csrr t0, mcause - addi t0, t0, -CAUSE_MACHINE_ECALL - beqz t0, handle_tohost + li t1, CAUSE_SUPERVISOR_ECALL + beq t0, t1, handle_tohost + li t1, CAUSE_MACHINE_ECALL + beq t0, t1, handle_tohost j wtf - .align 6 -power_on_reset: +handle_reset: la sp, STACK_TOP - SIZEOF_TRAPFRAME_T csrw mscratch, sp li a1, 1337 @@ -45,7 +40,6 @@ power_on_reset: .globl pop_tf pop_tf: - csrc sstatus, SSTATUS_IE LOAD t0,33*REGBYTES(a0) csrw sepc,t0 LOAD x1,1*REGBYTES(a0) |