diff options
Diffstat (limited to 'arch/riscv64')
| -rw-r--r-- | arch/riscv64/kernel/entry.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/riscv64/kernel/entry.S b/arch/riscv64/kernel/entry.S index 32a04f6..2f9a9e6 100644 --- a/arch/riscv64/kernel/entry.S +++ b/arch/riscv64/kernel/entry.S @@ -149,3 +149,24 @@ _load_context: /* assume supervisor for now */ sret + +.global ret_userspace_fast +ret_userspace_fast: + lr sp, offsetof_regs(tp) + addi sp, sp, -sizeof_registers + + lr s0, offsetof_exec(tp) + csrw CSR_SEPC, s0 + + csrw CSR_SSCRATCH, tp + + lr a0, offsetof_a0(sp) + lr a1, offsetof_a1(sp) + lr a2, offsetof_a2(sp) + lr a3, offsetof_a3(sp) + lr a4, offsetof_a4(sp) + lr a5, offsetof_a5(sp) + + lr sp, offsetof_sp(sp) + + sret |