when we hit a conflict where the pci INTL register gives us
a different irq than we get from southbridge irq router, dont
just change the router setting to the bios assigned irq (that
was previously known as the BIOS workarround), but assume the
southbridge setting to be valid and change the pci INTL register
on the device to it.
only when the router link doesnt seem to be configured or
disabled, then program the router to the irq that bios asisgned
in the INTL register.
the reason is that changing the router setting changes the
irq routing for *all* devices on the same link and changing
it breaks previously checked and valid interrupt routings.
(so happend with virtualbox where the last device on the bus
is some powermanagement device that has wrong INTL setting
and changing the routing breaks the ethernet interrupts)
this change shouldnt affect modern machines which use ioapic
and mp tables or acpi for pci interrupt routing.
we add new function convmemsize() that returns the size of
*usable* conventional memory that does some sanity checking
and reserves the last KB below the top of memory pointer.
this avoids lowraminit() overriding potential bios tables
and sigsearch() going off the rails looking for tables
at above 640K.
the x200s is too slow on a single core to keep up without
audio buffer underruns, so the idea is to flush screen
in parallel to witing audio samples in a separate process.
with the proc, we also can keep updating the screen on resize
when paused.
Based on OpenBSD driver:
- /sys/dev/pci/azalia.c rev 1.209
- /sys/dev/pci/pcidevs rev 1.1689
- only tested on amd64; machine is an Acer V5-573G
exact model: V5-573G-74518G1Takk
sed just continued writing past genbuf when it should stop
with "Output line too long".
quit when we get unspecified options.
stupid casts from long to char* for no reason.
some 0 vs nil cleanup.
traditionally, the pc kernel mapped the first 8MB of physical
address space. when the kernel size grows beyond that memory mapping,
it will crash on boot and theres no checking in the build process
making sure it fits.
with the pc64 kernel, it is not hard to always map the whole
kernel memory image from KZERO to end[], so that the kernel will
always fit into the initial mapping.
we can improve performance alot by using webfs which
does http keep alives for us, so connection setup
overhead is eleminated.
fix 9p flushes and double frees.
we can avoid some flickering when removing the software cursor
from the shadow framebuffer by avoiding the flushscreenimage()
call.
once the cursor is redrawn, we flush the combined rect of its
old and new position in one go.
werrstr() takes a format string as its first argument.
a common error is to pass user controlled string buffers
into werrstr() that might contain format string escapes
causing werrstr() to take bogus arguments from the stack
and crash.
so instead of doing:
werrstr(buf);
we want todo:
werrstr("%s", buf);
or if we have a local ERRMAX sized buffer that we can override:
errstr(buf, sizeof buf);
this fixes a potential format string problem where the
error string is passed to werrstr() as fmt. also, the
directory comparsion is simplified in this version using
a helper function.
when dial is called with a generic dialstring, it will try
/net and /net.alt in sequence. error out if the /net dial
gets interrupted and do not continue dialing /net.alt.
reduce stack usage by using the swaping nature of errstr()
instead of keeping two error string buffers on the stack.
