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| author | Kevin O'Connor <kevin@koconnor.net> | 2015-08-10 16:14:48 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2015-08-24 11:02:13 -0400 |
| commit | bd5f6c7432f4c8297871ed4e243dc69a9cece318 (patch) | |
| tree | 68dd87717f2d7ff05b1540ea8911810192f823e6 /src/hw/timer.c | |
| parent | bc46ebe2edeb624c1d1ae6f5c914dd0ae12fb0fa (diff) | |
| download | seabios-hppa-bd5f6c7432f4c8297871ed4e243dc69a9cece318.zip seabios-hppa-bd5f6c7432f4c8297871ed4e243dc69a9cece318.tar.gz seabios-hppa-bd5f6c7432f4c8297871ed4e243dc69a9cece318.tar.bz2 | |
Add minimal support for machines without hardware interrupts
Some Chromebooks (with Baytrail CPUs) apparently do not support
routing of legacy interrupts. This patch adds minimal support for
running SeaBIOS in such an environment. Even with this patch, it is
known that old operating systems and even some recent bootloaders will
not function without real hardware interrupts.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/hw/timer.c')
| -rw-r--r-- | src/hw/timer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/hw/timer.c b/src/hw/timer.c index 882b772..03d22b2 100644 --- a/src/hw/timer.c +++ b/src/hw/timer.c @@ -242,6 +242,8 @@ ticks_from_ms(u32 ms) void pit_setup(void) { + if (!CONFIG_HARDWARE_IRQ) + return; // timer0: binary count, 16bit count, mode 2 outb(PM_SEL_TIMER0|PM_ACCESS_WORD|PM_MODE2|PM_CNT_BINARY, PORT_PIT_MODE); // maximum count of 0000H = 18.2Hz |