cinap_lenrek [Sat, 22 Nov 2014 16:23:46 +0000 (17:23 +0100)]
pc, pc64: more conservative pcirouting
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.
cinap_lenrek [Thu, 20 Nov 2014 18:05:43 +0000 (19:05 +0100)]
pc, pc64: preserve last KB of conventional memory (might contain bios tables)
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.
cinap_lenrek [Tue, 18 Nov 2014 15:07:34 +0000 (16:07 +0100)]
games/snes: flush screen in parallel to audio (fixes buffer underruns on x200s)
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.
cinap_lenrek [Mon, 17 Nov 2014 09:12:29 +0000 (10:12 +0100)]
audiohda: add pci ids for Intel 8 Series Lynx Point (thanks quux)
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
cinap_lenrek [Sat, 15 Nov 2014 10:43:05 +0000 (11:43 +0100)]
pc64: get rid of fixed 8MB INIMAP and dynamically map KZERO-end in l.s
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.
cinap_lenrek [Mon, 10 Nov 2014 11:13:07 +0000 (12:13 +0100)]
ether8169: add support for RTL8411B (thanks quux)
from quux 9fans post:
- based on the following changes in FreeBSD/OpenBSD:
http://svnweb.freebsd.org/base?view=revision&revision=257305
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/ic/re.c.diff?r1=1.144&r2=1.145&f=h
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/ic/rtl81x9reg.h.diff?r1=1.76&r2=1.77&f=h
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/ic/rtl81x9reg.h.diff?r1=1.83&r2=1.84&f=h
- sysinfo _with_ patch, on amd64 (please disregard non-working audio and iwl stuff):
http://sysinfo.9front.org/src/86/body
- tested only on amd64; machine is an Acer V5-573G (exact model: V5-573G-74518G1Takk)
cinap_lenrek [Fri, 7 Nov 2014 11:51:59 +0000 (12:51 +0100)]
fix dangerous werrstr() usages
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);
cinap_lenrek [Fri, 7 Nov 2014 07:42:19 +0000 (08:42 +0100)]
libc: import cleaned up syslog() function from sources
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.
cinap_lenrek [Fri, 7 Nov 2014 07:10:19 +0000 (08:10 +0100)]
libc: improve dial error handling
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.
cinap_lenrek [Fri, 7 Nov 2014 04:21:42 +0000 (05:21 +0100)]
devproc: reset p->pdbg under p->debug qlock in procstopwait()
theres a race where procstopwait() is interrupted by a note,
setting p->pdbg to nil *before* acquiering the lock and
and pexit() and procctl() accessing it assuming it doesnt
change under them while they are holding the lock.
mischief [Thu, 6 Nov 2014 01:24:55 +0000 (17:24 -0800)]
libc: allow dial to be interrupted
previously, if dial was interrupted by an alarm or other note while connecting to a host that resolved to multiple ips, dial would ignore the interruption and try the next host. now dial properly returns with error when it is interrupted.
cinap_lenrek [Wed, 5 Nov 2014 19:42:47 +0000 (20:42 +0100)]
termrc: setup mouse when we have a framebuffer
previously, we setup mouse only when vgasize= was specifid in
plan9.ini. with efi systems, the framebuffer is already setup
for us and theres no requirement for going thru aux/vga setup,
but we still want to setup the mouse.
so do the mouseport= check once theres a framebuffer by testing
the existence of '#i/winname' (which fails when thers no
framebuffer).
cinap_lenrek [Tue, 4 Nov 2014 04:52:42 +0000 (05:52 +0100)]
pc: enable page size extension early in apbootstrap
vmware in efi mode brings application processors up
with CR4 = 0 (pse disabled) which makes us page fault
when accessing the ap's pdb which might be in a 4MB
mapping when the boot processor used pse to setup
page tables.
so we unconditionally enable pse in apbootstrap
(and disable pae in case of surprises).
cinap_lenrek [Fri, 31 Oct 2014 18:43:47 +0000 (19:43 +0100)]
efi: iso filesystem support for cdrom booting
instead of including kernel and config in the efi
fat image, we can just include the loaders and
read the plan9.ini and kernel from iso filesystem
just like the bios loaders.
cinap_lenrek [Thu, 23 Oct 2014 22:40:09 +0000 (00:40 +0200)]
efi: change eficonfig ordering so memconf() is first, dont fallback to fs when /cfg/pxe/ file isnt there
having the memconf() (*e820=) last clutters the screen.
do it first, so we can read *acpi= and *bootscreen=
prints.
we want to continue using tftp even when the /cfg/pxe/$ether
file is not found. only when we detect no pxe/dhcp session,
then we switch to local filesystem (non-network boot).
cinap_lenrek [Tue, 21 Oct 2014 04:03:03 +0000 (06:03 +0200)]
pc, pc64: make mtrr() callable from interrupt context and before mpinit
to make it possible to mark the bootscreen framebuffer
as write combining in early initialization, mtrr() is
changed not not to error() but to return an error string.
as bootscreen() is used before multiprocessor initialization,
we have to synchronize the mtrr's for every processor as
it comes online. for this, a new mtrrsync() function is
provided that is called from cpuidentify() if mtrr support
is indicated.
the boot processor runs mtrrsync() which snarfs the
registers. later, mtrrsync() is run again from the
application processors which apply the values from the
boot processor.
checkmtrr() from mp.c was removed as its task is also
done by mtrrsync() now.
cinap_lenrek [Sat, 18 Oct 2014 00:01:58 +0000 (02:01 +0200)]
pc, pc64: allow passing RSDT pointer in *acpi= boot parameter, early bootscreeninit(), fix rampage() usage
rampage() cannot be used after meminit(), so test for
conf.mem[0].npage != 0 and use xalloc()/mallocalign()
instead. this allows us to use vmap() early before
mmuinit() which is needed for bootscreeninit() and
acpi.
to get memory for page tables, pc64 needs a lowraminit().
with EFI, the RSDT pointer is passed in *acpi= parameter
from the efi loader. as the RSDT is ususally at the end of
the physical address space (and not to be found in
bios areas), we cannot KMAP() it so we need to vmap().