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| author | Kevin O'Connor <kevin@koconnor.net> | 2008-06-21 12:15:10 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2008-06-21 12:15:10 -0400 |
| commit | 61d6b06696b7efc6e6bc1df6573ba58e743d6ae3 (patch) | |
| tree | b1c58d048abcbb27fe6130554828db45c803aded /src/output.c | |
| parent | db03d5db185430812775f0075a18da459b96a019 (diff) | |
| download | seabios-hppa-61d6b06696b7efc6e6bc1df6573ba58e743d6ae3.zip seabios-hppa-61d6b06696b7efc6e6bc1df6573ba58e743d6ae3.tar.gz seabios-hppa-61d6b06696b7efc6e6bc1df6573ba58e743d6ae3.tar.bz2 | |
Init serial port before using it for debug - also reinit after option rom.
Apparently, some VGA option roms will enable serial irqs - this could
cause problems with spurious irqs from debug messages.
Also, improve debugging of option roms that fail the checksum check.
Diffstat (limited to 'src/output.c')
| -rw-r--r-- | src/output.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/output.c b/src/output.c index 054082f..dd647a2 100644 --- a/src/output.c +++ b/src/output.c @@ -13,6 +13,25 @@ #define DEBUG_PORT 0x03f8 #define DEBUG_TIMEOUT 100000 +void +debug_serial_setup() +{ + if (!CONFIG_DEBUG_SERIAL) + return; + // setup for serial logging: 8N1 + u8 oldparam, newparam = 0x03; + oldparam = inb(DEBUG_PORT+3); + outb(newparam, DEBUG_PORT+3); + // Disable irqs + u8 oldier, newier = 0; + oldier = inb(DEBUG_PORT+1); + outb(newier, DEBUG_PORT+1); + + if (oldparam != newparam || oldier != newier) + dprintf(1, "Changing serial settings was %x/%x now %x/%x\n" + , oldparam, oldier, newparam, newier); +} + static void debug_serial(char c) { |