figuring out all the crazy nuances of getting this working, and to
Michael Lorenz for testing/fixing my changes on macppc. Tested with a
quad-proc 7044-270.
Summary of changes:
Bumped CPU_MAXNUM to 16 on ofppc.
Added md_* routines to ofppc/cpu.c, to sync the timebase, and awaken the CPUs.
Fixed a bug in the test for a 64bit bridge cpu early in locore.S
Added code to set the interrupt priority for all CPUs with an openpic.
Change rtas to probe before cpus, to allow use of the rtas freeze/thaw
timebase code routines.
Fix CPU_INFO_FOREACH macro to iterate through detected cpus, not CPU_MAXNUM.
Change most uses of ci_cpuid to ci_index, to deal with CPUs that do not allow
writing to SPR_PIR. Don't write SPR_PIR unless the secondary cpu identifies
itself as 0.
Change the hatchstack/interrupt stack allocations to allocate a 8192byte
interrupt stack, and a 4096 byte hatch stack, align them to 16 bytes, and
allocate them no lower than 0x10000. Allocate them separately to prevent the
hatch stack corrupting the interrupt stack later on.
If the CPU is a 64bit cpu, copy SPR_ASR in cpu_hatch()
Set the idle stack to ci->ci_data.cpu_idlelwp->l_addr->u_pcb.pcb_sp.
Add OF_start_cpu(). Add a routine to ofwoea_initppc to spin up secondary
procs early, and place them into a spinloop waiting for the hatch routines
to be ready.
Modify the ipi routines to deal with openpics that reverse byte order on read
from an ipi register. (such as on the 7044)
Change the rtas setup to allocate the rtas physical base address above
the kernel, to avoid mucking up the hatch/interrupt stacks.
PCI_NETBSD_CONFIGURE. Add some code to hopefully better handle the
firepower and powerstackII, based on the OFW dumps from those machines.
Untested on those machines, but doesn't break anything on pegasos/7044.
configuration of the machine is. Amusingly, the OFW on the pegasos is
dead wrong.
Bump CPU_MAXNUM to 8, because, thats probably a reasonable number for now.
based machine. Currently the kernel to run on this machine is
incompatible with the standard GENERIC kernel, so for now, we have a
separate GENERIC_B64. Eventually, I hope to combine the two.
Please note, this is a port of 32bit ofppc, not a powerpc64 port.
Thanks to Matt Thomas and Kevin Bowling for helping to make this port
possible.
Summary of changes:
Change ofwpci to use the ofmethod config for configuring the PCI bus,
rather than indirect configuration.
Move the wiring of the interrupt controllers from at the start of the
boot, into the configuration of the first PCI bus.
Rewrite the map_isa_ioregs() hack to work on a machine without BATs
Fix a ton of bugs in the genofw_find_pics routine, and in the map_space code.
Split the pic_openpic into openpic_common and pic_openpic.
Create a new pic_distopenpic driver, for the distributed openpic found on
some newer IBM machines.
Fix a bad panic in pmap_extract on 64bit bridge mode
better on ofppc. In doing so, we also move a few functions around in
macppc and the generic ofw powerpc stuff to allow better sharing of code.
Also, introduce a model_init function.
move ofb_cons.c from macppc/dev to powerpc/oea and rename it to rascons.
This gets rid of some naming confusion, and makes it OFW-MI rather than
macppc specific.
platform tends to just declare anything from 0x8 to 0xf as mem or io
regions willy-nilly, we need to avoid batmapping a few of those in order
to save space for USER_SR, KERNEL_SR and KERNEL2_SR. I picked values for
these three that are least-commonly used or used for non-vital things.
Remove the ofb driver. I'm not interested in trying to make this work.
It should be replaced with the genfb driver, which I have added,
commented out because that driver needs work before it will function on
ofppc. (it's too panic-happy, and ofppc needs a working autoconf.c)
Change the way we do isa_inb/outb. The new way is a slightly nastier
hack, but won't run afoul of the other isa drivers as much.
Fix ofw_consinit.c to remove the dependency on ofb.
working properly. This is still a work in progress, and all work so far
has been based on the PegasosII machne.
1) Rewrite how the ISA memory and IO space maps are found. More work
will still need to be done in this area.
2) Add a new OFW method of pci configuration. So far I can only get this
to work on the primary PCI bus on the Pegasos. Unsure if this is a
pegasos bug or a code bug.
3) Add the rtas device to ofppc, and add an "rtas_reboot" function to
rtas to allow me to reboot the PegasosII. The rtas driver works, and is
a great start but needs to be changed slightly to allow easier access to
the functions from outside the driver.
4) Fix a number of bugs that existed in the shared PCI code for ofw that
probably weren't tickled by macppc.
There is much much more left to do here, this is all still a work in
progress, but this commit will allow other people to play around with the
code if they want to.
This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.
TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.
NOTES:
pmppc was removed as an arch, and moved to a evbppc target.
int _bus_dmatag_subregion(bus_dma_tag_t tag,
bus_addr_t min_addr,
bus_addr_t max_addr,
bus_dma_tag_t *newtag,
int flags)
void _bus_dmatag_destroy(bus_dma_tag_t tag)
that allow a (normally broken/limited) device to restrict the bus address
range it can talk to. this is used by bce(4) to limit DMA addresses to
1GB range, the maximum the chip can address.
all this is from Yorick Hardy <yhardy@uj.ac.za> with input from several
people on tech-kern.
XXX: bus_dma(9) needs an update still.
- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.
to select the maximum segment size for each bus_dmamap_load (up to the maxsegsz
supplied to bus_dmamap_create). dm_maxsegsz is reset to the value supplied to
bus_dmamap_create when the dmamap is unloaded.
Use <powerpc/oea/bat.h> exclusively and remove <machine/bat.h> and
<powerpc/bat.h>. Remove unneeded <machine/cpufunc.h>. To insure
1:1 correspondence of <powerpc/FOO.h> to <machine/FOO.h> include
"../../powerpc/include/Makefile" in "arch/FOO/include/Makefile".
Incororpate <byte_swap.h> into <bswap.h> and then byte_swap.h
enabled on amd64). Add a dmat64 field to various PCI attach structures,
and pass it down where needed. Implement a simple new function called
pci_dma64_available(pa) to test if 64bit DMA addresses may be used.
This returns 1 iff _PCI_HAVE_DMA64 is defined in <machine/pci_machdep.h>,
and there is more than 4G of memory.
