[PATCH v4 3/8] firmware: fw_base: Simplified setup trap handler

[Xiang W]

The same detection was done twice when setting mtvec and trap_exit.
Merging can reduce code size.

Signed-off-by: Xiang W <wxjstz at 126.com>
Reviewed-by: Anup Patel <anup at brainfault.org>
---
 firmware/fw_base.S | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/firmware/fw_base.S b/firmware/fw_base.S
index d418041..f0dd0da 100644
--- a/firmware/fw_base.S
+++ b/firmware/fw_base.S
@@ -362,22 +362,14 @@ _start_warm:
 	srli	a5, a5, ('H' - 'A')
 	andi	a5, a5, 0x1
 	beq	a5, zero, _skip_trap_handler_rv32_hyp
-	lla	a4, _trap_handler_rv32_hyp
-_skip_trap_handler_rv32_hyp:
-#endif
-	csrw	CSR_MTVEC, a4
-
-#if __riscv_xlen == 32
 	/* Override trap exit for H-extension */
-	csrr	a5, CSR_MISA
-	srli	a5, a5, ('H' - 'A')
-	andi	a5, a5, 0x1
-	beq	a5, zero, _skip_trap_exit_rv32_hyp
-	lla	a4, _trap_exit_rv32_hyp
 	csrr	a5, CSR_MSCRATCH
+	lla	a4, _trap_exit_rv32_hyp
 	REG_S	a4, SBI_SCRATCH_TRAP_EXIT_OFFSET(a5)
-_skip_trap_exit_rv32_hyp:
+	lla	a4, _trap_handler_rv32_hyp
+_skip_trap_handler_rv32_hyp:
 #endif
+	csrw	CSR_MTVEC, a4
 
 	/* Initialize SBI runtime */
 	csrr	a0, CSR_MSCRATCH
-- 
2.43.0