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Rev Age Author Path Log message Diff
2227 6277 d 11 h decky /trunk/kernel/ start shutdown infrastructure  
2216 6278 d 21 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls
 
2170 6285 d 18 h jermar /trunk/kernel/ Simplify synchronization in as_switch().
The function was oversynchronized, which
was causing deadlocks on the address
space mutex.

Now, address spaces can only be switched
when the asidlock is held. This also protects
stealing of ASIDs. No other synchronization
is necessary.
 
2161 6287 d 21 h jermar /trunk/kernel/arch/sparc64/src/mm/ Fix TSB bug during TSB refill.
When one wants to enable a TSB entry, he or she should set the
entry invalid bit to false, as opposed to setting it to true.
 
2144 6288 d 19 h jermar /trunk/kernel/arch/sparc64/src/mm/ Fix TSB size.  
2143 6289 d 1 h jermar /trunk/kernel/arch/sparc64/include/ Remove unneeded enum member.  
2141 6289 d 17 h jermar /trunk/ The Ultimate Solution To Illegal Virtual Aliases.
It is better to avoid them completely than to fight them.
Switch the sparc64 port to 16K pages. The TLBs and TSBs
continue to operate with 8K pages only. Page tables and
other generic parts operate with 16K pages.

Because the MMU doesn't support 16K directly, each 16K
page is emulated by a pair of 8K pages. With 16K pages,
illegal aliases cannot be created in 16K D-cache.
 
2134 6290 d 21 h jermar /trunk/kernel/ Reworked handling of illegal virtual aliases caused by frame reuse.
We moved the incomplete handling from backend's frame method to
backend's page_fault method. The page_fault method is the one that
can create an illegal alias if it writes the userspace frame using
kernel address with a different page color than the page to which is
this frame mapped in userspace. When we detect this, we do D-cache
shootdown on all processors (!!!).

If we add code that accesses userspace memory from kernel address
space, we will have to check for illegal virtual aliases at all such
places.

I tested this on a 4-way simulated E6500 and a real-world Ultra 5,
which has unfortunatelly only one processor.

This solves ticket #26.
 
2129 6325 d 20 h jermar /trunk/ Fix small problem in sparc64 port.

Bump version to 0.2.0.4 (Sunset).
 
2125 6333 d 21 h decky /trunk/ experimental support for Objective C
(disabled by default)
 
2107 6341 d 19 h jermar /trunk/ When clock() is called by an external interrupt dispatched by the IRQ dispatcher,
no spinlock can be held or the kernel will not be preemptive. This fixes Ticket #24.

Formating and indentation fixes.
 
2106 6342 d 3 h jermar /trunk/kernel/ Merge as_t structure into one and leave the differring parts in as_genarch_t.

Indentation and formatting changes in header files.
 
2105 6346 d 4 h decky /trunk/kernel/ move ipc structures to ipc.h  
2091 6347 d 23 h jermar /trunk/kernel/arch/sparc64/src/ Fix creating the kkbdpoll() kernel thread on sparc64 SMP machines.
This fixes Ticket #19.
 
2089 6348 d 3 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes
 
2083 6354 d 3 h decky /trunk/kernel/ typedef elimination  
2082 6354 d 4 h decky /trunk/ __asm__ __volatile__ -> asm volatile  
2079 6354 d 22 h decky /trunk/kernel/ remove some typedefs in favor of anonymous structures  
2078 6355 d 0 h jermar /trunk/kernel/arch/sparc64/src/ When invalidating entire TLBs on sparc64, make sure to also invalidate any (locked) global entries.
This fixes Ticket #21.
Fix a comment in start.S stating that the kernel installs a global entry for itself. All entries installed by the kernel
are local to some memory context.
 
2076 6357 d 4 h jermar /trunk/kernel/ Beat the implicit illegal virtual alias created by reusing userspace frames.
In the anonymous and ELF backends, if the architecture has virtually indexed D-cache,
selectively flush cachelines belonging to the frame being freed.
This fixes Ticket #20.
 
2071 6358 d 20 h jermar /trunk/ (c) versus (C)  
2068 6366 d 4 h jermar /trunk/kernel/ Formatting and indentation fixes.  
2067 6369 d 2 h jermar /trunk/kernel/ More formatting changes.  
2065 6372 d 19 h jermar /trunk/kernel/ Coding style fixes and formatting improvements.  
2058 6385 d 5 h jermar /trunk/kernel/arch/sparc64/src/ Improve comments.  
2056 6386 d 8 h jermar /trunk/kernel/arch/sparc64/include/ Fix mismatched byteswapping macros on sparc64.  
2055 6386 d 9 h jermar /trunk/kernel/arch/sparc64/src/ sparc64 work:
- No need to lock kernel stack and userspace window buffer into DTLB.
 
2054 6386 d 19 h jermar /trunk/kernel/ Fix important comment in kernel/arch/sparc64/src/proc/scheduler.c.

Improve framebuffer code.

Formatting and indentation fixes.
 
2049 6390 d 5 h jermar /trunk/kernel/arch/sparc64/src/ More formatting and indentation changes.  
2048 6390 d 22 h jermar /trunk/ Formatting and indentation changes.  
2047 6392 d 19 h jermar /trunk/kernel/arch/sparc64/include/ Convert sparc64 critical section barriers to RMO memory model.
More portable, no confusion from documentation.
 
2046 6392 d 22 h jermar /trunk/kernel/arch/sparc64/include/ Another comment fix.  
2045 6392 d 22 h jermar /trunk/kernel/arch/sparc64/include/ Fix comment.  
2044 6392 d 23 h jermar /trunk/kernel/arch/sparc64/ On sparc64's tick interrupt, adjust the TICK_COMPARE register instead of the TICK
register. The TICK register now increments linearily and can be used by the get_cycle()
function.
 
2043 6392 d 23 h jermar /trunk/kernel/arch/sparc64/src/ Make the sparc64 kernel compile again.  
2038 6393 d 18 h jermar /trunk/kernel/arch/sparc64/ Remove old stuff.  
2037 6393 d 18 h jermar /trunk/kernel/arch/sparc64/include/ Backout change from revision 2034.
sparc64 is not yet ready for get_cycle().
 
2034 6394 d 2 h jermar /trunk/kernel/arch/sparc64/include/ get_cycle() for sparc64.  
2025 6395 d 18 h jermar /trunk/ Coding style fixes.  
2023 6395 d 21 h decky /trunk/kernel/arch/ add dummy cycle.h