Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: Don't check MIDELEG and MEDELEG at end of delegate_traps()

Browse Source 
The MIDELEG and MEDELEG CSR checks at end of delegate_traps() were
added for initial bring-up on SiFive Unleashed and QEMU. These
checks are not required any more and in-future these checks can
cause failures because some of the MIDELEG/MEDELEG bits will be
hard-wired to 0 or 1.

For related discussion, refer github issue:
https://github.com/riscv/opensbi/issues/157

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-02-18 11:37:16 +05:30
committed by Anup Patel
parent c66543d049
commit bc874e34ce
1 changed files with 0 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
lib/sbi/sbi_hart.c
View File

@@ -104,11 +104,6 @@ static int delegate_traps(struct sbi_scratch *scratch, u32 hartid)
csr_write(CSR_MIDELEG, interrupts); csr_write(CSR_MIDELEG, interrupts);
csr_write(CSR_MEDELEG, exceptions); csr_write(CSR_MEDELEG, exceptions);
if ((csr_read(CSR_MIDELEG) & interrupts) != interrupts)
return SBI_EFAIL;
if ((csr_read(CSR_MEDELEG) & exceptions) != exceptions)
return SBI_EFAIL;
return 0; return 0;
} }