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| author | Stewart Smith <stewart@linux.ibm.com> | 2019-04-26 11:59:57 -0500 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.ibm.com> | 2019-05-02 09:57:15 +1000 |
| commit | b877a4e8b9eaafcacd2ed31ebcf47b769929e68d (patch) | |
| tree | 3800af8139ceb1409d5453df331abf7722517a3c /hw/fsp | |
| parent | c51914b87b48a7b836b5048961e891e23cba457c (diff) | |
| download | skiboot-b877a4e8b9eaafcacd2ed31ebcf47b769929e68d.zip skiboot-b877a4e8b9eaafcacd2ed31ebcf47b769929e68d.tar.gz skiboot-b877a4e8b9eaafcacd2ed31ebcf47b769929e68d.tar.bz2 | |
Write boot progress to LPC port 80h
This is an adaptation of what we currently do for op_display() on FSP
machines, inventing an encoding for what we can write into the single
byte at LPC port 80h.
Port 80h is often used on x86 systems to indicate boot progress/status
and dates back a decent amount of time. Since a byte isn't exactly very
expressive for everything that can go on (and wrong) during boot, it's
all about compromise.
Some systems (such as Zaius/Barreleye G2) have a physical dual 7 segment
display that display these codes. So far, this has only been driven by
hostboot (see hostboot commit 90ec2e65314c).
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
Diffstat (limited to 'hw/fsp')
| -rw-r--r-- | hw/fsp/fsp-op-panel.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/hw/fsp/fsp-op-panel.c b/hw/fsp/fsp-op-panel.c index 7063cbb..6477e73 100644 --- a/hw/fsp/fsp-op-panel.c +++ b/hw/fsp/fsp-op-panel.c @@ -55,8 +55,10 @@ void op_display(enum op_severity sev, enum op_module mod, uint16_t code) uint32_t w0; uint32_t w1; - if (!fsp_present()) + if (!fsp_present()) { + op_display_lpc(sev, mod, code); return; + } w0 = sev << 16 | mod; |