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Commit Graph

3730 Commits

Author SHA1 Message Date
Peter Wemm
bf8ca114e2 Fix the VADDR() macros to use either KVADDR() or UVADDR(), depending
on the implied sign extension.  The single unified VADDR() macro was
not able to avoid sign extending the VM_MAXUSER_ADDRESS/USRSTACK values.
Be explicit about UVADDR() (positive address space) and KVADDR()
(kernel negative address space) to make mistakes show up more
spectacularly.

Increase user VM space from 1/2TB (512GB) to 128TB.
2003-07-09 23:04:23 +00:00
Peter Wemm
6486c09935 Fix up bogus index/offset/mask calculations in the allocpte and the
corresponding release code.  This was preventing the use of more than
1/2TB of user VM.  I also spent a week staring at this code only to
eventually find that I'd mistakenly typed a P as an R.
2003-07-09 22:59:45 +00:00
Peter Wemm
4afd44c16a Turn the 2MB page mappings that cover the kernel text+data+bss area back
on now that pmap_pte() can handle it.  I never actually ran into anything
that broke that I know of, but this was turned off as a precaution.
2003-07-09 22:55:00 +00:00
Peter Wemm
436e1f203f Have pmap_pte() on a 2MB mapped address return the 2MB pde itself
rather than a non-existing pte.  There is code elsewhere in i386/amd64
pmap that neglects to handle the large page cases because it knows that
it will see PG_PS in the returned "pte".
2003-07-09 22:53:45 +00:00
Alan Cox
90a7c7b671 In pmap_object_init_pt(), the pmap_invalidate_all() should be performed on
the caller-provided pmap, not the kernel_pmap.  Using the kernel_pmap
results in an unnecessary IPI for TLB shootdown on SMPs.

Reviewed by:	jake, peter
2003-07-08 19:40:35 +00:00
Alan Cox
1f78f902a8 Background: pmap_object_init_pt() premaps the pages of a object in
order to avoid the overhead of later page faults.  In general, it
implements two cases: one for vnode-backed objects and one for
device-backed objects.  Only the device-backed case is really
machine-dependent, belonging in the pmap.

This commit moves the vnode-backed case into the (relatively) new
function vm_map_pmap_enter().  On amd64 and i386, this commit only
amounts to code rearrangement.  On alpha and ia64, the new machine
independent (MI) implementation of the vnode case is smaller and more
efficient than their pmap-based implementations.  (The MI
implementation takes advantage of the fact that objects in -CURRENT
are ordered collections of pages.)  On sparc64, pmap_object_init_pt()
hadn't (yet) been implemented.
2003-07-03 20:18:02 +00:00
Maxime Henrion
331e012396 Sync more things with other backends. 2003-07-01 19:16:48 +00:00
Maxime Henrion
4813f72a9b Honor the boundary of the busdma tag when allocating bounce pages.
This was fixed in revision 1.5 of alpha/alpha/busdma_machdep.c and
was never fixed in other busdma backends using bounce pages.
2003-07-01 16:54:54 +00:00
Scott Long
f6b1c44d1f Mega busdma API commit.
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg.
Lockfunc allows a driver to provide a function for managing its locking
semantics while using busdma.  At the moment, this is used for the
asynchronous busdma_swi and callback mechanism.  Two lockfunc implementations
are provided: busdma_lock_mutex() performs standard mutex operations on the
mutex that is specified from lockfuncarg.  dftl_lock() is a panic
implementation and is defaulted to when NULL, NULL are passed to
bus_dma_tag_create().  The only time that NULL, NULL should ever be used is
when the driver ensures that bus_dmamap_load() will not be deferred.
Drivers that do not provide their own locking can pass
busdma_lock_mutex,&Giant args in order to preserve the former behaviour.

sparc64 and powerpc do not provide real busdma_swi functions, so this is
largely a noop on those platforms.  The busdma_swi on is64 is not properly
locked yet, so warnings will be emitted on this platform when busdma
callback deferrals happen.

If anyone gets panics or warnings from dflt_lock() being called, please
let me know right away.

Reviewed by:	tmm, gibbs
2003-07-01 15:52:06 +00:00
Alan Cox
dca96f1adc - Export pmap_enter_quick() to the MI VM. This will permit the
implementation of a largely MI pmap_object_init_pt() for vnode-backed
   objects.  pmap_enter_quick() is implemented via pmap_enter() on sparc64
   and powerpc.
 - Correct a mismatch between pmap_object_init_pt()'s prototype and its
   various implementations.  (I plan to keep pmap_object_init_pt() as
   the MD hook for device-backed objects on i386 and amd64.)
 - Correct an error in ia64's pmap_enter_quick() and adjust its interface
   to match the other versions.  Discussed with: marcel
2003-06-29 21:20:04 +00:00
Jeff Roberson
ab875ef896 - Construct a cpu topology map for Hyper Threading systems so that ULE may
take advantage of them.
2003-06-28 22:07:42 +00:00
David Xu
b8f480ab94 Add a machine depended function thread_siginfo, SA signal code
will use the function to construct a siginfo structure and use
the result to export to userland.

Reviewed by: julian
2003-06-28 06:34:08 +00:00
Scott Long
7f95801188 Catch amd64 up with the pending busdma async callback locking. Though this
mechanism might change in the near future, it's best to keep everything in
sync right now.

Reminded by:	peter
2003-06-28 06:07:06 +00:00
Peter Wemm
b6a5f89b4d Turn ips back on. 2003-06-27 23:11:22 +00:00
Peter Wemm
1e5d8b3b66 Oops, I only added a comment about why ips doesn't compile. Actually
comment it out for real.
2003-06-26 04:01:59 +00:00
Peter Wemm
ba1cabf4b9 Sync with i386 - add everything that compiles. There are a few drivers
that are trivially easy to fix (eg: ips) that I've not committed fixes for.
2003-06-26 03:49:54 +00:00
Peter Wemm
2d29639ebb Add back in the ability for pmap_mapdev() to use KVM if the region
being requested is outside of the range of the direct map region.  eg:
for pci windows.  While here, increase the minimum size of the direct
map region to be 4GB instead of 1GB.
2003-06-26 01:04:31 +00:00
Alan Cox
0183359659 MFi386
Add vm object locking to pmap_object_init_pt().
2003-06-23 06:10:52 +00:00
Hidetoshi Shimokawa
e07324646e Move KERNBASE to -2GB.
Currently, we cannot increase KVA more than 2GB.
2003-06-22 13:02:45 +00:00
Hidetoshi Shimokawa
bfcd2ec739 - Allow access to direct mapped region via /dev/kmem. This makes
'netstat -r' work.
- Use direct map for /dev/mem.
2003-06-22 12:59:43 +00:00
Hidetoshi Shimokawa
c1c1cc9c19 - Allocate a new PD Table if kernel grows beyond 1GB boundary.
Reviewed by: peter

- Use direct map in pmap_mapdev().
2003-06-22 12:55:20 +00:00
Hidetoshi Shimokawa
e14720d614 Use direct map in pmap_map().
This saves much KVA for vm_pages and you don't need to increase NKPT
for large physical memory anymore.

Suggested by: dfr
2003-06-20 14:09:33 +00:00
Hidetoshi Shimokawa
d25ac2fa68 Fix direct map page table for 2GB+ physical memory.
You may still need to increase NKPT for larger memory.
I have successfully booted 8GB system with NKPT=256.
2003-06-19 12:14:37 +00:00
Alan Cox
40ebf3e43a Fix a performance bug in all of the various implementations of
uma_small_alloc(): They always zeroed the page regardless of what the
caller requested.
2003-06-18 02:57:38 +00:00
David Xu
0e2a4d3aeb Rename P_THREADED to P_SA. P_SA means a process is using scheduler
activations.
2003-06-15 00:31:24 +00:00
Alan Cox
49a2507bd1 Migrate the thread stack management functions from the machine-dependent
to the machine-independent parts of the VM.  At the same time, this
introduces vm object locking for the non-i386 platforms.

Two details:

1. KSTACK_GUARD has been removed in favor of KSTACK_GUARD_PAGES.  The
different machine-dependent implementations used various combinations
of KSTACK_GUARD and KSTACK_GUARD_PAGES.  To disable guard page, set
KSTACK_GUARD_PAGES to 0.

2. Remove the (unnecessary) clearing of PG_ZERO in vm_thread_new.  In
5.x, (but not 4.x,) PG_ZERO can only be set if VM_ALLOC_ZERO is passed
to vm_page_alloc() or vm_page_grab().
2003-06-14 23:23:55 +00:00
Alan Cox
89f4fca265 Move the *_new_altkstack() and *_dispose_altkstack() functions out of the
various pmap implementations into the machine-independent vm.  They were
all identical.
2003-06-14 06:20:25 +00:00
Peter Wemm
77e2a274d0 GC unused cpu_wait() function 2003-06-11 05:20:33 +00:00
John Baldwin
6b9691f103 - Use IDTVEC() to declare IPI handlers since they are also IDT vectors.
- Make handlers for IPI's used by SMP kernels #ifdef SMP.
2003-06-06 17:45:25 +00:00
John Baldwin
e59ae32f18 - Document the thermal and performance counter LVT entries in the local
APIC.
- Add a lvt_thermal member to the LAPIC struct.
- Add constants for the SMI and INIT LVT delivery modes.
2003-06-06 17:22:15 +00:00
Marcel Moolenaar
c2e4eb969f Change the second (and last) argument of cpu_set_upcall(). Previously
we were passing in a void* representing the PCB of the parent thread.
Now we pass a pointer to the parent thread itself.
The prime reason for this change is to allow cpu_set_upcall() to copy
(parts of) the trapframe instead of having it done in MI code in each
caller of cpu_set_upcall(). Copying the trapframe cannot always be
done with a simply bcopy() or may not always be optimal that way. On
ia64 specifically the trapframe contains information that is specific
to an entry into the kernel and can only be used by the corresponding
exit from the kernel. A trapframe copied verbatim from another frame
is in most cases useless without some additional normalization.

Note that this change removes the assignment to td->td_frame in some
implementations of cpu_set_upcall(). The assignment is redundant.
A previous call to cpu_thread_setup() already did the exact same
assignment. An added benefit of removing the redundant assignment is
that we can now change td_pcb without nasty side-effects.

This change officially marks the ability on ia64 for 1:1 threading.

Not tested on: amd64, powerpc
Compile & boot tested on: alpha, sparc64
Functionally tested on: i386, ia64
2003-06-04 22:46:27 +00:00
Peter Wemm
7fc03ef474 Fix ALIGNED_POINTER(). sizeof((u_int32_t)) is not legal C. 2003-06-04 02:15:13 +00:00
Peter Wemm
babc58fd74 Fix restarted syscalls. When we rewind %rip, we also need to restore
all the argument registers etc since we have almost certainly have trashed
them by now.  Take particular car of %r10 since it held the original value
of %rcx (which we saved in tf_rcx on entry and doreti doesn't know this).
2003-06-02 21:56:08 +00:00
Peter Wemm
c35518b4ed Make this more compatable with libc_r. Make the internal types for storing
registers an array of longs rather than int.
2003-06-02 21:49:35 +00:00
David E. O'Brien
006124d811 Use __FBSDID(). 2003-06-02 16:32:55 +00:00
David E. O'Brien
9676a785e7 Use __FBSDID(). 2003-06-02 06:43:15 +00:00
Peter Wemm
193b147c05 MFi386: i386/include/asm.h rev 1.11: Do not abuse ##. 2003-06-02 05:59:35 +00:00
David E. O'Brien
69bb404192 Use C99 compatable asm statements. 2003-06-02 00:29:35 +00:00
David E. O'Brien
713c939103 Sync with i386/GENERIC ordering. 2003-06-01 20:26:38 +00:00
Peter Wemm
395aac85f8 MFi386: rev 1.56: remove break after return 2003-05-31 22:02:11 +00:00
Peter Wemm
0c5b3efcb0 MFi386: rev 1.23: use gdb_strlen()/gdb_strcpy() directly. 2003-05-31 22:00:57 +00:00
Peter Wemm
fbbfc4c335 MFi386: rev 1.50: remove unused variable 2003-05-31 21:58:55 +00:00
Poul-Henning Kamp
618b80ddcf Avoid unbalancing the { } count in the source file with #ifdef by
putting the opening { after the #ifdef ... #endif sequence.

Found by:       FlexeLint
2003-05-31 20:25:53 +00:00
Peter Wemm
4af5a3de60 Add acpi to the build. Remove the hack from machdep.c that lies to the
loader to shut it up.
2003-05-31 07:00:08 +00:00
Peter Wemm
b043c80645 Have hammer_time() return the proc0 stack location, and have locore
switch to it before calling mi_startup().  The bootstack is WAY too small
for running acpica during probe/attach.  While here, pass modulep/physfree
to the startup routine, rather than writing to the global variables in
locore.S.

Approved by:  re (amd64/*)
2003-05-31 06:54:29 +00:00
Peter Wemm
5681a6f60d Regenerate. 2003-05-31 06:51:04 +00:00
Peter Wemm
1f5b79bc16 Make this compile with WITNESS enabled. It wants the syscall names. 2003-05-31 06:49:53 +00:00
Peter Wemm
ff7bf2f72e Port acpica to amd64.
Approved by:  re (amd64/* blanket)
2003-05-31 06:47:05 +00:00
Peter Wemm
cc71eb5e10 With the help of jhb, fix the ACPI_ACQUIRE_GLOBAL_LOCK() macros and
port to amd64 after repocopy.

Approved by: re (amd64/*)
2003-05-31 06:43:55 +00:00
Hiten Pandya
b77c32a07e Rename BUS_DMAMEM_NOSYNC to BUS_DMA_COHERENT.
The current name is confusing, because it indicates to
the client that a bus_dmamap_sync() operation is not
necessary when the flag is specified, which is wrong.

The main purpose of this flag is to hint the underlying
architecture that DMA memory should be mapped in a coherent
way, but the architecture can ignore it.  But if the
architecture does supports coherent mapping of memory, then
it makes bus_dmamap_sync() calls cheap.

This flag is the same as the one in NetBSD's Bus DMA.

Reviewed by: gibbs, scottl, des (implicitly)
Approved by: re@ (jhb)
2003-05-30 20:40:33 +00:00
Peter Wemm
5c980babcd Nasty 'make it compile' port to amd64. Note that it needs some other
wire protocol for the extra registers.  I should probably just remove it
from here for now since its quite useless.

Approved by:	re (amd64/* blanket)
2003-05-30 01:02:52 +00:00
Peter Wemm
5feb2148ba Initial port to amd64 after repocopy from i386. Note that the
disassembler has not been updated yet, and will do some very strange
things.  It does tracebacks (without function arguments due to regparm
calling conventions) if -fno-omit-frame-pointer is used (to come later).
This achieves basic functionality.

Approved by:	re (amd64/* blanket)
2003-05-30 01:01:07 +00:00
Peter Wemm
0afbc83dfd Add setjmp/longjmp for ddb 2003-05-30 00:58:48 +00:00
Peter Wemm
5e1b7df5cf Update AMD Features vector to include NX (page table entry no-execute bit)
and LM (long mode) etc.
2003-05-27 21:59:56 +00:00
Scott Long
7e71df9339 Bring back bus_dmasync_op_t. It is now a typedef to an int, though the
BUS_DMASYNC_ definitions remain as before.  The does not change the ABI,
and reverts the API to be a bit more compatible and flexible.  This has
survived a full 'make universe'.

Approved by:	re (bmah)
2003-05-27 04:59:59 +00:00
Scott Long
c87d464f28 De-orbit bus_dmamem_alloc_size(). It's a hack and was never used anyways.
No need for it to pollute the 5.x API any further.

Approved by:	re (bmah)
2003-05-26 04:00:52 +00:00
Peter Wemm
3ebd9b48ce Stop profiled libc from exploding, matching gcc's generated code.
Approved by: re (amd64/* blanket)
2003-05-24 18:24:03 +00:00
Peter Wemm
d9cd1af4aa Typo fix. oops.
Submitted by:  jmallett
Approved by:   re (blanket amd64/*)
2003-05-23 06:36:46 +00:00
Peter Wemm
cbd667fa2f Update comments. Note that the kernel is at -1GB, not -2GB as erroniously
implied by the previous commit.  KVM is still only 1GB until
pmap_growkernel() learns about the extra page table level.

Approved by:  re (blanket)
2003-05-23 06:35:45 +00:00
Peter Wemm
f229f5cf85 As suggested by the gdb folks, pad the 'struct fpreg' to a full 512 bytes
to match the native fxsave/fxrstor object size since thats apparently what
the Linux/NetBSD folks do.
2003-05-23 06:31:56 +00:00
Peter Wemm
9f0c4ab393 Deal with the user VM space expanding. 32 bit applications do not like
having their stack at the 512GB mark.  Give 4GB of user VM space for 32
bit apps.  Note that this is significantly more than on i386 which gives
only about 2.9GB of user VM to a process (1GB for kernel, plus page
table pages which eat user VM space).

Approved by: re (blanket)
2003-05-23 05:07:33 +00:00
Peter Wemm
3c9a3c9ca3 Major pmap rework to take advantage of the larger address space on amd64
systems.  Of note:
- Implement a direct mapped region using 2MB pages.  This eliminates the
  need for temporary mappings when getting ptes.  This supports up to
  512GB of physical memory for now.  This should be enough for a while.
- Implement a 4-tier page table system.  Most of the infrastructure is
  there for 128TB of userland virtual address space, but only 512GB is
  presently enabled due to a mystery bug somewhere.  The design of this
  was heavily inspired by the alpha pmap.c.
- The kernel is moved into the negative address space(!).
- The kernel has 2GB of KVM available.
- Provide a uma memory allocator to use the direct map region to take
  advantage of the 2MB TLBs.
- Fixed some assumptions in the bus_space macros about the ability
  to fit virtual addresses in an 'int'.

Notable missing things:
- pmap_growkernel() should be able to grow to 512GB of KVM by expanding
  downwards below kernbase.  The kernel must be at the top 2GB of the
  negative address space because of gcc code generation strategies.
- need to fix the >512GB user vm code.

Approved by:	re (blanket)
2003-05-23 05:04:54 +00:00
Peter Wemm
997f3bfc2a Merge from i386/trap.c rev 1.252. Use td_critnest instead of the
spinlocks count for explicitly enabling interrupts.

Approved by:	re (blanket)
2003-05-22 20:09:50 +00:00
Alexander Kabaev
980ded9a7d sys/sys/limits.h:
- Fix visibilty test for LONG_BIT and WORD_BIT.  `#if defined(__FOO_VISIBLE)'
   is alays wrong because __FOO_VISIBLE is always defined (to 0 for
   invisibility).

sys/<arch>/include/limits.h
sys/<arch>/include/_limits.h:

 - Style fixes.

Submitted by:	bde
Reviewed by:	bsdmike
Approved by:	re (scottl)
2003-05-19 20:29:07 +00:00
Peter Wemm
5c0fe26236 Actually get all the bits for sd_hibase.. it was 16 bits short. oops.
Approved by:	re (amd64/* blanket)
2003-05-17 02:05:10 +00:00
Alan Cox
4a0d6dfd2c Initialize logical_cpus_mask when the logical CPUs are enumerated in
the mptable.  (Previously, logical_cpus_mask was only initialized if
the hyperthreading fixup was executed.)

Approved by:	re (jhb)
Reviewed by:	ps
2003-05-15 05:12:24 +00:00
Peter Wemm
c0a54ff621 Collect the nastiness for preserving the kernel MSR_GSBASE around the
load_gs() calls into a single place that is less likely to go wrong.

Eliminate the per-process context switching of MSR_GSBASE, because it
should be constant for a single cpu.  Instead, save/restore it during
the loading of the new %gs selector for the new process.

Approved by:	re (amd64/* blanket)
2003-05-15 00:23:40 +00:00
Peter Wemm
be52ef1399 Use compile time constants for things like PTmap[] etc because they're
about to move outside of the +/- 2GB range

Suggested by:	jake
Approved by:	re (amd64/* blanket)
2003-05-15 00:20:17 +00:00
Peter Wemm
e14528b349 Regen
Approved by: re (amd64 blanket)
2003-05-14 04:11:25 +00:00
Peter Wemm
d85631c4ac Add BASIC i386 binary support for the amd64 kernel. This is largely
stolen from the ia64/ia32 code (indeed there was a repocopy), but I've
redone the MD parts and added and fixed a few essential syscalls.  It
is sufficient to run i386 binaries like /bin/ls, /usr/bin/id (dynamic)
and p4.  The ia64 code has not implemented signal delivery, so I had
to do that.

Before you say it, yes, this does need to go in a common place.  But
we're in a freeze at the moment and I didn't want to risk breaking ia64.
I will sort this out after the freeze so that the common code is in a
common place.

On the AMD64 side, this required adding segment selector context switch
support and some other support infrastructure.  The %fs/%gs etc code
is hairy because loading %gs will clobber the kernel's current MSR_GSBASE
setting.  The segment selectors are not used by the kernel, so they're only
changed at context switch time or when changing modes.  This still needs
to be optimized.

Approved by:	re (amd64/* blanket)
2003-05-14 04:10:49 +00:00
Peter Wemm
5d5ca6d75e Fix some misunderstandings about 64 bit extension.
Fix fuword/suword - they're supposed to be 'long' - ie: point them
at fuword64/suword64 instead of the incorrect 32 bit versions.
2003-05-14 03:38:13 +00:00
John Baldwin
90af4afacb - Merge struct procsig with struct sigacts.
- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)
2003-05-13 20:36:02 +00:00
Peter Wemm
8a6d52c3f8 Really stop the loader from trying to load the acpi module by lying and
pretending that it is already here.

Approved by:	re (amd64/* stuff)
2003-05-12 18:37:56 +00:00
Peter Wemm
0fe93e7480 For the page fault handler, save %cr2 in the outer trap handler so that
we do not have to run so long with interrupts disabled.  This involved
creating tf_addr in the trapframe.  Reorganize the trap stubs so that
they consistently reserve the stack space and initialize any missing
bits.

Approved by:	re (amd64 stuff)
2003-05-12 18:33:19 +00:00
Peter Wemm
0f6241620b Sync ucontext with reality. The struct trapframe changes need to be
reflected here.

Approved by:	re (blanket amd64/*)
2003-05-12 18:23:04 +00:00
Peter Wemm
e9b193dc33 AMD64 physical space is much larger than i386, de-i386 the bus_space and
bus_dma MD code for AMD64.  (And a trivial ifdef update in dev/kbd because
of this).  More updates are needed here to take advantage of the 64 bit
instructions.

Approved by:	re (blanket amd64/*)
2003-05-12 02:44:37 +00:00
Peter Wemm
bf1e897425 Give a %fs and %gs to userland. Use swapgs to obtain the kernel %GS.base
value on entry and exit.  This isn't as easy as it sounds because when
we recursively trap or interrupt, we have to avoid duplicating the
swapgs instruction or we end up back with the userland %gs.  I implemented
this by testing TF_CS to see if we're coming from supervisor mode
already, and check for returning to supervisor. To avoid a race with
interrupts in the brief period after beginning executing the handler and
before the swapgs, convert all trap gates to interrupt gates, and reenable
interrupts immediately after the swapgs.  I am not happy with this.
There are other possible ways to do this that should be investigated.
(eg: storing the GS.base MSR value in the trapframe)

Add some sysarch functions to let the userland code get to this.

Approved by:	re (blanket amd64/*)
2003-05-12 02:37:29 +00:00
Peter Wemm
85983c59cd Call it an AMD64 Processor, not a Hammer. Also, it seems that the cpuid
model numbers are wider than I first thought.

Approved by: re (blanket amd64/*)
2003-05-11 23:01:04 +00:00
Peter Wemm
f75b005a99 I missed another printf format error while extracting the patch.
Approved by: re (blanket amd64/*)
2003-05-11 22:55:40 +00:00
Peter Wemm
eeee69d45c Make atdevbase long for the KERNBASE > 4GB case
Approved by: re (amd64/* blanket)
2003-05-11 22:53:43 +00:00
Peter Wemm
5a337b2589 Fix printf format errors that were undetected due to using the standard
FSF compiler during early development.
2003-05-11 22:40:25 +00:00
Peter Wemm
5048926df9 Export PML4SHIFT and PDPSHIFT
Approved by: re (blanket amd64/*)
2003-05-11 22:39:40 +00:00
Peter Wemm
4ce3e250ce Since compiling natively, the compile environment has been less forgiving
about silly typos.  Use the correct comment sequences.
2003-05-11 22:38:54 +00:00
Peter Wemm
0fe0f2515b Provide a fake varargs implementation for lint's benefit. This way
it can see the intent of the va_* macros, even though it cannot work.

Approved by:	re (blanket amd64/*)
2003-05-10 00:55:15 +00:00
Peter Wemm
e1ef71de2b Remove _ARCH_INDIRECT ifdefs. They existed for lib/msun/* on i386, which
could use different versions of the math code depending on whether there
was real floating point hardware or math emulation.  Since the fpu is
part of the core specification on amd64, there is no need for this here.

Approved by:	re (blanket amd64/*)
2003-05-10 00:53:34 +00:00
Peter Wemm
2e4f687a1d bcopyb() isn't used on amd64 kernel (it only exists for i386/pcvt)
Approved by:	re (blanket amd64/*)
2003-05-10 00:51:29 +00:00
Peter Wemm
5826a47e9b Finish translating i386/support.s into amd64 asm - replace bcopy etc with
asm versions.  This yields about a 5% kernel compile time speedup.
2003-05-10 00:49:56 +00:00
Peter Wemm
395e65aa29 Include the MXCSR initial values, based on the AMD docs. This file
should really be renamed to fpu.h and npx.c to fpu.c since its part of
the core architecture on amd64 systems, not an isa 'numeric processor
extension'.
2003-05-09 18:28:05 +00:00
Peter Wemm
14426b9c3b Turn syscons on now that it works, so that anybody trying to run this
can see something.  Probing for keyboard still works for auto serial
console mode.
2003-05-09 18:26:06 +00:00
Peter Wemm
b3f7680e49 Oops. Turn T_PAGEFLT back into an interrupt gate. It is *critical*
that interrupts be disabled and remain disabled until %cr2 is read.
Otherwise we can preempt and another process can fault, and by the
time we read %cr2, we see a different processes fault address.  This
Greatly Confuses vm_fault() (to say the least).  The i386 port has
got this marked as a bug workaround for a Cyrix CPU, which is what
lead me astray.  Its actually necessary for preemption, regardless
of whether Cyrix cpus had a bug or not.
2003-05-08 08:25:51 +00:00
Peter Wemm
2dbe628162 Leave space for the 128 byte red-zone on the stack. 2003-05-08 00:13:24 +00:00
Peter Wemm
f3b234157e #include <machine/metadata.h> was missing; add it 2003-05-08 00:12:37 +00:00
Peter Wemm
9c43b77ff5 Fix a preemption race. I was reenabling interrupts in the fast system
call handler before it was safe.  It was possible for to lose context
and for something else to clobber the PCPU scratch variable.  This
moves the interrupt enable *way* too late, but its better safe than
sorry for the moment.
2003-05-08 00:05:00 +00:00
John Baldwin
ace85d0a3c Style nits.
Approved by:	re (bmah)
2003-05-07 17:21:38 +00:00
Alexander Kabaev
0eda4c08a5 Style fixes.
Remove DBL_DIG, DBL_MIN, DBL_MAX and their FLT_ counterparts, they
were marked for deprecation ever since SUSv1 at least.
Only define ULLONG_MIN/MAX and LLONG_MAX if long long type is
supported.
Restore a lost comment in MI _limits.h file and remove it from
sys/limits.h where it does not belong.
2003-05-04 22:13:04 +00:00
Peter Wemm
5b27e93419 Repocopy *.s to *.S 2003-05-03 00:21:43 +00:00
Peter Wemm
abf50ec921 I changed the numbering of the MODINFOMD_SMAP during the commit, so
recognize the old number for my development boxes so I can use old
loader/pxeboot for a while if I need to.
2003-05-01 04:18:02 +00:00
Peter Wemm
7f47668191 Slight reorg and added AMD64 support. A couple of the MODINFOMD_* values
that were added to sparc64 and later powerpc, really should have been in
the MI area.  But changing that now with insufficient preperation will
just cause too much pain.

Move MD_FETCH() to the MI sys/linker.h file to avoid another two copies
of it.
2003-05-01 03:31:18 +00:00
Peter Wemm
afa8862328 Commit MD parts of a loosely functional AMD64 port. This is based on
a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to
attempt to get a stable base to start from.  There is a lot missing still.
Worth noting:
- The kernel runs at 1GB in order to cheat with the pmap code.  pmap uses
  a variation of the PAE code in order to avoid having to worry about 4
  levels of page tables yet.
- It boots in 64 bit "long mode" with a tiny trampoline embedded in the
  i386 loader.  This simplifies locore.s greatly.
- There are still quite a few fragments of i386-specific code that have
  not been translated yet, and some that I cheated and wrote dumb C
  versions of (bcopy etc).
- It has both int 0x80 for syscalls (but using registers for argument
  passing, as is native on the amd64 ABI), and the 'syscall' instruction
  for syscalls.  int 0x80 preserves all registers, 'syscall' does not.
- I have tried to minimize looking at the NetBSD code, except in a couple
  of places (eg: to find which register they use to replace the trashed
  %rcx register in the syscall instruction).  As a result, there is not a
  lot of similarity.  I did look at NetBSD a few times while debugging to
  get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
Peter Wemm
1e57e9eba3 Repocopy from x86_64/... to amd64/...
Rename visible x86_64 references to amd64.
Kill MID_MACHINE, its a.out specific, the only platform that supports it
is i386.  All of the other platforms should remove it too.
2003-04-30 22:51:59 +00:00