Commit Graph

180 Commits

Author SHA1 Message Date
Thomas Moestl
5f19cf9309 Implement DELAY() using the %tick register. 2001-10-12 15:51:19 +00:00
Thomas Moestl
4bc38523ec Add pmap_kenter_flags(), which is used by MD bus code that will be
committed soon, add a stub form pmap_kenter_temporary(), and implement
pmap_extract() and pmap_kextract().
2001-10-12 15:49:51 +00:00
Paul Saab
cbc89bfbfe Make MAXTSIZ, DFLDSIZ, MAXDSIZ, DFLSSIZ, MAXSSIZ, SGROWSIZ loader
tunable.

Reviewed by:	peter
MFC after:	2 weeks
2001-10-10 23:06:54 +00:00
Dag-Erling Smørgrav
3da3249106 Dissociate ptrace from procfs.
Until now, the ptrace syscall was implemented as a wrapper that called
various functions in procfs depending on which ptrace operation was
requested.  Most of these functions were themselves wrappers around
procfs_{read,write}_{,db,fp}regs(), with only some extra error checks,
which weren't necessary in the ptrace case anyway.

This commit moves procfs_rwmem() from procfs_mem.c into sys_process.c
(renaming it to proc_rwmem() in the process), and implements ptrace()
directly in terms of procfs_{read,write}_{,db,fp}regs() instead of
having it fake up a struct uio and then call procfs_do{,db,fp}regs().

It also moves the prototypes for procfs_{read,write}_{,db,fp}regs()
and proc_rwmem() from proc.h to ptrace.h, and marks all procfs files
except procfs_machdep.c as "optional procfs" instead of "standard".
2001-10-07 20:08:42 +00:00
Jake Burkholder
fc67f24833 Add contents to struct *reg. 2001-09-30 19:59:07 +00:00
Jake Burkholder
fa753b0bcb Optimize bcopy and bzero etc to use 64 bit loads and stores if possible.
Handle overlap in bcopy.
Add routines for copying and zeroing pages using physical addresses
directly.
Remove all the hacks to account for calling the firmware on its own
trap table, we use the kernel trap table.  There is still a problem
with OF_exit().
2001-09-30 19:50:39 +00:00
Jake Burkholder
c4bc2cc714 Use %ver to identify the cpu instead of openfirmware.
Submitted by:	robert
2001-09-30 19:45:34 +00:00
Jake Burkholder
92767809a8 Remove some debug code, add traces. 2001-09-30 19:44:19 +00:00
Jake Burkholder
6b75800a1e Return EIO for procfs_*_dbregs. 2001-09-30 19:43:18 +00:00
Jake Burkholder
b34f88ee74 Add a place holder for PSTATE_SECURE, which detects if user code it
trying to set bad pstate bits.
2001-09-30 19:42:34 +00:00
Jake Burkholder
e5e8823f37 Split the low level trap code into trap, interrupt and syscall, its
easier and hopefully this code is done changing radically.

Don't use the mmu tlb register to address the kernel page table, nor
the 8k pointer register.  The hardware will do some of the page table
lookup by storing the the base address in an internal register and
calculating the address of the tte in the table.  However it is limited
to a 1 meg tsb, which only maps 512 megs.  The kernel page table only
has one level, so its easy to just do it by hand, which has the advantage
of supporting abitrary amounts of kvm and only costs a few more instructions.

Increase kvm to 1 gig now that its easy to do so and so we don't waste
most of a 4 meg page.

Fix some traces.  Fix more proc locking.

Call tsb_stte_promote if we get a soft fault on a mapping in the upper
levels of the tsb.  If there is an invalid or unreferenced mapping
in the primary tsb, it will be replaced.

Immediately fail for faults occuring in {f,s}uswintr.
2001-09-30 19:41:20 +00:00
Jake Burkholder
15b39a57a5 Implement sysarch(). 2001-09-30 19:06:45 +00:00
Jake Burkholder
c92d1bd289 Fix some traces. td->p_comm doesn't exist. 2001-09-30 19:05:30 +00:00
Jake Burkholder
956856ae06 Move the kernel to end of the first 4 gigabytes of address space, so that
one 4 meg page can map both the kernel and the openfirmware mappings.
Add the openfirmware mappings to the kernel tsb so we can call the firmware
on the kernel trap table and access kernel memory normally.
Implement pmap_swapout_proc, pmap_swapin_proc, pmap_swapout_thread,
pmap_swapin_thread, pmap_activate, pmap_page_exists, and pmap_phys_address.
2001-09-30 19:03:22 +00:00
Jake Burkholder
954f0d930e Add a macro to get the context from a tte tag, not necesarily a whole
tte.  Remove the old inline.
2001-09-30 18:55:05 +00:00
Jake Burkholder
ba0eb60597 Include <machine/setjmp.h> instead of <setjmp.h>. 2001-09-30 18:52:56 +00:00
Jake Burkholder
b71c31cefa Don't use types that require other headers. 2001-09-30 18:52:17 +00:00
Jake Burkholder
6df08a9593 Wrap hardware trap types in ifdef _kernel. 2001-09-30 18:51:18 +00:00
Jake Burkholder
18ef271232 Move the pcb the to the top of the kernel stack.
Add a guard page at the bottom of the kernel stack.  Its unclear how easy
it will be to detect these faults and do something useful.
Setup the registers on exec how the c runtime expects.
Implement various {fill,set}_*regs.
Fix proc locking.
2001-09-30 18:48:37 +00:00
Jake Burkholder
75c6786401 Don't overflow the ktr buffer <gulp>. 2001-09-30 18:42:56 +00:00
Jake Burkholder
c81f893d0c Implement PCPU_ADDR. Align functions on 16 bytes boundaries. 2001-09-30 18:41:57 +00:00
David E. O'Brien
090905a55c + Fix misplacement of `txp'
+ Document our -CURRENT debugging bits
2001-09-24 03:23:48 +00:00
Jake Burkholder
53beacfa00 Add kernbase symbol and use it instead of magic numbers in the
linker script.
2001-09-21 05:43:38 +00:00
John Baldwin
fd54558a83 - If we ever do the per-cpu KTR stuff, the index won't be volatile as it
will be private to each CPU.
- Re-style(9) the globaldata structures.  There really needs to be a MI
  struct pcpu that has a MD struct mdpcpu member at some point.
2001-09-18 21:46:26 +00:00
Peter Wemm
949224d60e Set thread0->td_pcb, this is probably why jake was getting a null deref. 2001-09-14 09:41:26 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Peter Wemm
eb30c1c0b9 Rip some well duplicated code out of cpu_wait() and cpu_exit() and move
it to the MI area.  KSE touched cpu_wait() which had the same change
replicated five ways for each platform.  Now it can just do it once.
The only MD parts seemed to be dealing with fpu state cleanup and things
like vm86 cleanup on x86.  The rest was identical.

XXX: ia64 and powerpc did not have cpu_throw(), so I've put a functional
stub in place.

Reviewed by:	jake, tmm, dillon
2001-09-10 04:28:58 +00:00
David E. O'Brien
45ae6e9aca style(9) the structure definitions. 2001-09-05 16:20:30 +00:00
David E. O'Brien
bcc9d95fe0 style(9) the structure definitions. 2001-09-05 05:18:35 +00:00
David E. O'Brien
68b0bc4fa3 style(9) the structure names 2001-09-04 09:23:23 +00:00
Peter Wemm
cfbf880deb Zap #if 0'ed map init code that got moved to the MI area.
Convert the powerpc tree to use the common code.
2001-09-04 08:42:35 +00:00
Jake Burkholder
5566cfb4db Make this compile. 2001-09-04 01:17:39 +00:00
Jake Burkholder
e94e5aae9f Remove some stale definitions and update for new assembler code. 2001-09-03 23:19:18 +00:00
Jake Burkholder
1faf318ce0 Add ktr traces to copy{in,out} and cpu_switch.
Context switch the cwp value.  The register usage in cpu_switch will
be updated shortly to better reflect the fact that the current window
may change.
2001-09-03 23:18:02 +00:00
Jake Burkholder
8114bd27c1 Add comments following what other architectures have.
Fiddle the register values in the trapframe so children returning from
fork() return 0 (and success).
2001-09-03 23:15:54 +00:00
Jake Burkholder
cc8b4c0416 Change tf_arg to uintptr_t from void * to reflect the fact that
non-pointer values may be passed in it.  Add appropriate casts.

The interrupt type is now passed in tf_arg instead tf_type.
2001-09-03 23:13:42 +00:00
Jake Burkholder
880a354a4a Implement a slightly different window spill/fill algorithm for dealing
with user windows in kernel mode.  We split the windows using %otherwin,
but instead of spilling user window directly to the pcb, we attempt to
spill to user space.  If this fails because a stack page is not resident
(or the stack is smashed), the fault handler at tl 2 will detect the
situation and resume at tl 1 again where recovery code can spill to the
pcb.  Any windows that have been saved to the pcb will be copied out to
the user stack on return from kernel mode.

Add a first stab at 32 bit window handling.  This uses much of the same
recovery code as above because the alignment of the stack pointer is used
to detect 32 bit code.  Attempting to spill a 32 bit window to a 64 bit
stack, or vice versa, will cause an alignment fault.  The recovery code
then changes the window state to vector to a 32 bit spill/fill handler
and retries the faulting instruction.

Add ktr traces in useful places during trap processing.

Adjust comments to reflect new code and add many more.
2001-09-03 23:10:45 +00:00
Jake Burkholder
ce1e7a70b9 Move the alternate global register stack to struct globaldata. 2001-09-03 22:58:05 +00:00
Jake Burkholder
8cf38f95f7 Add ktr traces. 2001-09-03 22:57:21 +00:00
Jake Burkholder
ccc64d13f3 Implement pv_bit_count which is used by pmap_ts_referenced.
Remove the modified tte bit and add a softwrite bit.  Mappings are only
writeable if they have been written to, thus in general modify just
duplicates the write bit.  The softwrite bit makes it easier to distinguish
mappings which should be writeable but are not yet modified.

Move the exec bit down one, it was being sign extended when used as an
immediate operand.

Use the lock bit to mean tsb page and remove the tsb bit.  These are the
only form of locked (tsb) entries we support and we need to conserve bits
where possible.

Implement pmap_copy_page and pmap_is_modified and friends.

Detect mappings that are being being upgraded from read-only to read-write
due to copy-on-write and update the write bit appropriately.

Make trap_mmu_fault do the right thing for protection faults, which is
necessary to implement copy on write correctly.  Also handle a bunch
more userland trap types and add ktr traces.
2001-09-03 22:55:12 +00:00
Jake Burkholder
9a0f54a4de Implement signals. 2001-09-03 22:41:40 +00:00
Jake Burkholder
a5ffa592c7 Move %ver definitions from pstate.h to ver.h. Add definitions for normal
kernel pstate values, which include a memory store order override.
2001-09-03 22:36:11 +00:00
Jake Burkholder
a78f8e2104 Add simple macros for tracing in assembler files. There are quite
a few places where we cannot even call a function, and these have
proven to be very useful debugging tools for such situations.
2001-09-03 22:32:49 +00:00
Jake Burkholder
3d450a75c1 Use the correct copyrights. Note where most of this came from.
Requested by:	obrien
2001-09-03 22:27:23 +00:00
Jake Burkholder
e586bed159 Bump UPAGES to 4. The pcb can be rather large. 2001-09-03 22:19:36 +00:00
Jake Burkholder
4324ea045e mtx_savecrit is a pil level, not a pstate value, thus mtx_intr_enable
was not doing its thing.
2001-09-03 22:19:04 +00:00
Jake Burkholder
275e4fcf0a Add a flushw() macro. 2001-09-03 22:13:53 +00:00
Jake Burkholder
f8da586016 Add atomic_load and store functions without membars, fwiw. 2001-09-03 22:03:25 +00:00
Jake Burkholder
e19e5d8968 The definition for ASI_IMMU_TAG_TARGET_REG was wrong. Sort. 2001-09-03 22:02:15 +00:00
David E. O'Brien
de08586125 + Blah, there was nothing wrong in rev 1.1 talking about the i386/NOTES.
I should have diff'ed the header with the Alpha GENERIC.
+ fix style nit
+ turn on NO_MODULES for now.
2001-09-02 23:48:37 +00:00
David E. O'Brien
ee843c7fd1 Match the style of very other platform we have. 2001-09-02 23:37:45 +00:00
Peter Wemm
80d3dee1c9 Converge with i386/alpha/etc pmap.c for pmap_new_proc/pmap_dispose_proc(). 2001-08-31 06:30:27 +00:00
Matthew Dillon
356861db03 Remove the MPSAFE keyword from the parser for syscalls.master.
Instead introduce the [M] prefix to existing keywords.  e.g.
MSTD is the MP SAFE version of STD.  This is prepatory for a
massive Giant lock pushdown.  The old MPSAFE keyword made
syscalls.master too messy.

Begin comments MP-Safe procedures with the comment:
/*
 * MPSAFE
 */
This comments means that the procedure may be called without
Giant held (The procedure itself may still need to obtain
Giant temporarily to do its thing).

sv_prepsyscall() is now MP SAFE and assumed to be MP SAFE
sv_transtrap() is now MP SAFE and assumed to be MP SAFE

ktrsyscall() and ktrsysret() are now MP SAFE (Giant Pushdown)
trapsignal() is now MP SAFE (Giant Pushdown)

Places which used to do the if (mtx_owned(&Giant)) mtx_unlock(&Giant)
test in syscall[2]() in */*/trap.c now do not.  Instead they
explicitly unlock Giant if they previously obtained it, and then
assert that it is no longer held to catch broken system calls.

Rebuild syscall tables.
2001-08-30 18:50:57 +00:00
Mike Barcroft
03516cfeb0 o Remove some GCCisms in src/powerpc/include/endian.h.
o Unify <machine/endian.h>'s across all architectures.
o Make bswapXX() functions use a different spelling of u_int16_t and
  friends to reduce namespace pollution.  The bswapXX() functions
  don't actually exist, but we'll probably import these at some
  point.  Atleast one driver (if_de) depends on bswapXX() for big
  endian cases.
o Deprecate byteorder(3) prototypes from <sys/types.h>, these are
  now prototyped indirectly in <arpa/inet.h>.
o Deprecate in_addr_t and in_port_t typedefs in <sys/types.h>, these
  are now typedef'd in <arpa/inet.h>.
o Change byteorder(3) prototypes to use standards compliant uint32_t
  (spelled __uint32_t to reduce namespace pollution).
o Document new preferred headers and standards compliance.

Discussed with:	bde
PR:		29946
Reviewed by:	bmilekic
2001-08-30 00:04:19 +00:00
Jake Burkholder
f2594a872e Use register g6 to point to a small stack for svaing alternate globals
during trap handlers.
Implement ptrace_set_pc FWIW.
Initialize the pcb window scratch area in setregs(), and setup user
registers as specified by the SCD.

Submitted by:	tmm
2001-08-21 00:07:37 +00:00
Jake Burkholder
0a90a07733 Handle the pcb window scratch area in cpu_fork.
Implement cpu_exit.

Submitted by:	tmm
2001-08-21 00:02:54 +00:00
Jake Burkholder
9e4ffd02dc Save and restore %fprs and %y, which are unused by kernel code, but
may be used by 32bit userland code.
Implement cpu_throw().

Submitted by:	tmm
2001-08-21 00:01:28 +00:00
Jake Burkholder
8d5e3be7a4 Disable interrupts when calling openfirmware. 2001-08-21 00:00:18 +00:00
Jake Burkholder
0839a4e34b Rename fp_init_pcb to fp_init_proc. Set the FEF bit in fprs register;
according the SCD it should be set if no user trap handler in set.

Submitted by:	tmm
2001-08-20 23:56:19 +00:00
Jake Burkholder
1f175fd0ec Add definitions for new assembler code. 2001-08-20 23:53:11 +00:00
Jake Burkholder
78d6df223d Catch up with new trap entry point names. 2001-08-20 23:51:40 +00:00
Jake Burkholder
ef3df3f0fe Add variables needed by hardware watchpoint support.
Submitted by:	tmm
2001-08-20 23:50:48 +00:00
Jake Burkholder
11676d49ba Add code for supporting hardware watch points.
Submitted by:	tmm
2001-08-20 23:50:08 +00:00
Jake Burkholder
bdb71a81f3 Add a system call trap type and syscall() call request handler.
Also add support for hardware watch point traps.

Submitted by:	tmm
2001-08-20 23:43:43 +00:00
Jake Burkholder
e2aceedd5a Add support for splitting the register windows on entry to the
kernel from usermode.  The remaining user windows are spilled
to the pcb as necessary.  The user land window fault handlers
fill directly from the pcb on return.
Add system call entry points.

Submitted by:	tmm
2001-08-20 23:40:31 +00:00
Jake Burkholder
b3ef0bf465 db_expr_t is signed. 2001-08-20 23:35:15 +00:00
Jake Burkholder
076f1c081a Add definitions for bits in condition code register and the load store
unit control registers.  Move tstate definitions to their own file.

Submitted by:	tmm
2001-08-20 23:34:46 +00:00
Jake Burkholder
2b31cfd3a0 Add a definition for the load store unit control register. 2001-08-20 23:31:41 +00:00
David E. O'Brien
c9ba45aa7a Sync globals.h up with the other platforms. There is still some cruft in
here, but now all the platforms have the same cruft.  Consistantly spell
the `struct globaldata *' "globalp".

Reviewed by:	peter
2001-08-20 21:29:16 +00:00
Jake Burkholder
8091b69762 Don't needlessly duplicate what's basically the same copyright. 2001-08-18 19:09:55 +00:00
Jake Burkholder
be30ee31a5 Implement cpu_wait(). 2001-08-18 18:11:48 +00:00
Jake Burkholder
cdc04697be Increase the size of the phys_avail memory map. Implement pmap_dispose_proc.
Turn some more potentially import functions into nops so we can do stuff
until they matter.
2001-08-18 18:11:13 +00:00
Jake Burkholder
f70bfa97c0 Spell ta 1 correctly as ta %xcc, 1. Use %pil for critical enter/exit
instead of pstate.ie.  Note that popc is not implemented in hardware
on certain ultras, so we can't use it for inline ffs (suck).
2001-08-18 18:07:37 +00:00
Jake Burkholder
cae71da765 Gcc 3.0 requires a .register pseudo-op for certain global registers when
used in assembly language.  Tell it to ignore the registers for now.
2001-08-18 18:05:24 +00:00
David E. O'Brien
589278dbae style(9) and make consistent across platforms 2001-08-16 09:29:35 +00:00
Andrey A. Chernov
2a54e09dff OFF_T -> OFF (more standard style) 2001-08-15 19:50:59 +00:00
Andrey A. Chernov
a6314641a4 Add OFF_T_MAX/OFF_T_MIN 2001-08-15 19:25:08 +00:00
David E. O'Brien
7a92dc6167 Sync up with the latest ansi.h in other platforms -- especially RUNE and
wchar bits.
2001-08-15 03:55:37 +00:00
Jake Burkholder
c64e8a395b Add a GENERIC kernel config for sparc64. 2001-08-14 03:27:02 +00:00
Jake Burkholder
05ae93afbf Add some definitions that got left out, *blush*. 2001-08-14 03:10:41 +00:00
Jake Burkholder
39f004ea89 Don't define ELF_RTLD_ADDR twice. 2001-08-14 03:09:19 +00:00
John Baldwin
688ebe120c - Close races with signals and other AST's being triggered while we are in
the process of exiting the kernel.  The ast() function now loops as long
  as the PS_ASTPENDING or PS_NEEDRESCHED flags are set.  It returns with
  preemption disabled so that any further AST's that arrive via an
  interrupt will be delayed until the low-level MD code returns to user
  mode.
- Use u_int's to store the tick counts for profiling purposes so that we
  do not need sched_lock just to read p_sticks.  This also closes a
  problem where the call to addupc_task() could screw up the arithmetic
  due to non-atomic reads of p_sticks.
- Axe need_proftick(), aston(), astoff(), astpending(), need_resched(),
  clear_resched(), and resched_wanted() in favor of direct bit operations
  on p_sflag.
- Fix up locking with sched_lock some.  In addupc_intr(), use sched_lock
  to ensure pr_addr and pr_ticks are updated atomically with setting
  PS_OWEUPC.  In ast() we clear pr_ticks atomically with clearing
  PS_OWEUPC.  We also do not grab the lock just to test a flag.
- Simplify the handling of Giant in ast() slightly.

Reviewed by:	bde (mostly)
2001-08-10 22:53:32 +00:00
Jake Burkholder
f02f55a8e3 Correct copyright language. 2001-08-10 04:51:19 +00:00
Jake Burkholder
416d9c00fa Add code to program the tick register and to setup its interrupt handler. 2001-08-10 04:49:33 +00:00
Jake Burkholder
228fa56391 Add early code to support interrupts. 2001-08-10 04:48:48 +00:00
Jake Burkholder
f69f6debc3 Fake up the frame pointers on a process's initial stack so they can be
restored correctly from the trapframe.

Submitted by:	tmm
2001-08-10 04:47:14 +00:00
Jake Burkholder
22693a0fef Handle all types of mmu misses from user mode.
Pass a context argument to tlb functions.
2001-08-10 04:44:33 +00:00
Jake Burkholder
a3698a6d7f Use the macro for getting the trap type from the trapframe.
Only set sticks (and acquire sched_lock) on entry from user mode.
Add handlers for all kinds of mmu misses, and for interrupts from
user mode.
Acquire Giant before calling into the vm system so this runs with
invariants.
Try to get the restrictions for page faults on user memory from
kernel mode right.
Only set pcb_onfault and return to the alternate return code if
this is actually a fault on user memory from kernel mode.
2001-08-10 04:43:31 +00:00
Jake Burkholder
c0eedfbccb Store 8 bytes instead of 4 in suword. Use a temporary stack that's known
to be locked in the tlb for calling openfirmware.

Submitted by:	tmm
2001-08-10 04:39:23 +00:00
Jake Burkholder
e822e0eefb Pass a context to tlb_store_slot, use a member(Sync) after setting the
secondary context register.
2001-08-10 04:37:03 +00:00
Jake Burkholder
9a6cacf3dd 1. Start the clock running early for testing.
2. Use the upcoming "tick" interface.
3. Save a call frame as well as a trap frame on proc0's initial stack.
4. Setup a pointer to the per-cpu interrupt queue.
5. Install the per-cpu pointer in interrupt and alternate globals as well.
6. Flush out setregs so exec works.

Submitted by:	tmm (3, 5, 6)
2001-08-10 04:36:00 +00:00
Jake Burkholder
346d41dd6f Set the pil to something sane on startup. 2001-08-10 04:32:13 +00:00
Jake Burkholder
4a7517d17f Add definitions needed by new assembler code. 2001-08-10 04:31:30 +00:00
Jake Burkholder
cc11501e3b 1. Add code to handle traps and interrupts from user mode.
2. Add spill and fill handlers for spills to the user stack on entry
   to the kernel.
3. Add code to handle instruction mmu misses from user mode.
4. Add code to handle level interrupts from kernel mode and vectored
   interrupt traps from either.
5. Save the pil in the trapframe on entry from kernel mode and restore
   it on return.

Submitted by:	tmm (1, 2)
2001-08-10 04:30:36 +00:00
Jake Burkholder
8dec6a681e Add code to handle stack traces that go all the way back to userland.
Use a better algorithm for finding out if an address is in the kernel.

Submitted by:	tmm
2001-08-10 04:23:41 +00:00
Jake Burkholder
8a7de3c054 Add trap types for interrupts. Ad definitions to get the interrupt level
from the trap type.
2001-08-10 04:22:24 +00:00
Jake Burkholder
fa01c0ff70 1. Add code to demap pages from the tlb for user contexts.
2. Add a context argument to most functions, instead of extracting it from
   from the tte.

Submitted by:	tmm (1).
2001-08-10 04:21:44 +00:00
Jake Burkholder
0cb2d36969 Add fields that point to per-cpu interrupt data. 2001-08-10 04:18:48 +00:00
Jake Burkholder
db6c479810 Add a field to trapframe for saving the pil. 2001-08-10 04:18:13 +00:00
Jake Burkholder
c13c9cbf4f Add asis for interrupt registers. 2001-08-10 04:17:29 +00:00