From d5725c24c6ea04368d90bc0f5af3ec20862b4a3b Mon Sep 17 00:00:00 2001
From: Alistair Francis <alistair.francis@wdc.com>
Date: Tue, 16 Jun 2020 17:06:15 -0700
Subject: lib: Don't print delegation CSRs if there is no S-Mode
If the platform doesn't support S-Mode don't print the delegation
registers.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
---
lib/sbi/sbi_hart.c | 4 ++++
1 file changed, 4 insertions(+)
(limited to 'lib/sbi/sbi_hart.c')
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 88d0ac8..e943346 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -122,6 +122,10 @@ static int delegate_traps(struct sbi_scratch *scratch, u32 hartid)
void sbi_hart_delegation_dump(struct sbi_scratch *scratch)
{
+ if (!misa_extension('S'))
+ /* No delegation possible as mideleg does not exist*/
+ return;
+
#if __riscv_xlen == 32
sbi_printf("MIDELEG : 0x%08lx\n", csr_read(CSR_MIDELEG));
sbi_printf("MEDELEG : 0x%08lx\n", csr_read(CSR_MEDELEG));
--
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