diff options
| author | Atish Patra <atish.patra@wdc.com> | 2019-03-06 05:03:27 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-03-07 05:37:18 +0300 |
| commit | b225583881c82eaab3059af9277c091432d50266 (patch) | |
| tree | b4261f2bd35af68233d9cbacd5238750bd59b1f8 /firmware | |
| parent | 69d794cbcbab9ad50e090b06fd7ff6fd2b7b8315 (diff) | |
| download | opensbi-b225583881c82eaab3059af9277c091432d50266.tar.xz | |
firmware: Add nop to reduce bus traffic.
All the non-boot harts run in a tight loop which may cause a heavy load
on the memory bus. This may delay the boot hart to complete the cold boot
process.
Introduce few nop that will ease up the traffic.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/fw_base.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/firmware/fw_base.S b/firmware/fw_base.S index 9b525cc..dccaef1 100644 --- a/firmware/fw_base.S +++ b/firmware/fw_base.S @@ -116,6 +116,10 @@ _fdt_reloc_done: _wait_for_boot_hart: la a4, _boot_hart_done REG_L a5, (a4) + /* Reduce the bus traffic so that boot hart may proceed faster */ + nop + nop + nop beqz a5, _wait_for_boot_hart _start_warm: |