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Rev Age Author Path Log message Diff
2454 6358 d 2 h jermar /trunk/kernel/ A bit of infrastructure for building with different compilers.
CFLAGS split into GCC_CFLAGS and SUNCC_CFLAGS.
As of now, there are no separate ICC_CFLAGS, but can be easily added.
 
2272 6405 d 5 h jermar /trunk/kernel/ Indentation and formatting fixes.  
2267 6407 d 4 h jermar /trunk/kernel/arch/sparc64/src/mm/ Fix indentation.  
2266 6407 d 5 h jermar /trunk/kernel/arch/sparc64/src/mm/ Add few assertions to tsb.c and clean it up a little bit.  
2252 6409 d 2 h jermar /trunk/kernel/arch/sparc64/src/mm/ Move one MEMBAR instruction from a delay slot,
which is, due to SF Erratum #51, a potentionally
dangerous place for a MEMBAR to be.
 
2231 6415 d 7 h jermar /trunk/kernel/arch/sparc64/ Fix a nasty bug in the TLB miss handlers on sparc64.
After we no longer lock the kernel stack in the DTLB,
there is a real danger of nested DTLB misses. The nested
miss can very easily clobber the DTLB Tag Access register.
Therefore, the original miss may not read this register, but
it has to receive its value as an argument. The argument
value is saved in the trap table when it is guaranteed that
the nested TLB miss will not occur.
 
2228 6415 d 10 h jermar /trunk/kernel/arch/sparc64/src/ Fix ticket #28.
In switch_to_userspace(), the uarg argument is in %i2, not in %i3.
 
2227 6415 d 17 h decky /trunk/kernel/ start shutdown infrastructure  
2216 6417 d 3 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls
 
2170 6424 d 1 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 6426 d 4 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 6427 d 2 h jermar /trunk/kernel/arch/sparc64/src/mm/ Fix TSB size.  
2143 6427 d 8 h jermar /trunk/kernel/arch/sparc64/include/ Remove unneeded enum member.  
2141 6428 d 0 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 6429 d 4 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 6464 d 3 h jermar /trunk/ Fix small problem in sparc64 port.

Bump version to 0.2.0.4 (Sunset).
 
2125 6472 d 3 h decky /trunk/ experimental support for Objective C
(disabled by default)
 
2107 6480 d 2 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 6480 d 10 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 6484 d 11 h decky /trunk/kernel/ move ipc structures to ipc.h  
2091 6486 d 6 h jermar /trunk/kernel/arch/sparc64/src/ Fix creating the kkbdpoll() kernel thread on sparc64 SMP machines.
This fixes Ticket #19.
 
2089 6486 d 10 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes
 
2083 6492 d 10 h decky /trunk/kernel/ typedef elimination  
2082 6492 d 10 h decky /trunk/ __asm__ __volatile__ -> asm volatile  
2079 6493 d 5 h decky /trunk/kernel/ remove some typedefs in favor of anonymous structures  
2078 6493 d 7 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 6495 d 11 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 6497 d 3 h jermar /trunk/ (c) versus (C)  
2068 6504 d 10 h jermar /trunk/kernel/ Formatting and indentation fixes.  
2067 6507 d 9 h jermar /trunk/kernel/ More formatting changes.  
2065 6511 d 1 h jermar /trunk/kernel/ Coding style fixes and formatting improvements.  
2058 6523 d 12 h jermar /trunk/kernel/arch/sparc64/src/ Improve comments.  
2056 6524 d 15 h jermar /trunk/kernel/arch/sparc64/include/ Fix mismatched byteswapping macros on sparc64.  
2055 6524 d 15 h jermar /trunk/kernel/arch/sparc64/src/ sparc64 work:
- No need to lock kernel stack and userspace window buffer into DTLB.
 
2054 6525 d 1 h jermar /trunk/kernel/ Fix important comment in kernel/arch/sparc64/src/proc/scheduler.c.

Improve framebuffer code.

Formatting and indentation fixes.
 
2049 6528 d 11 h jermar /trunk/kernel/arch/sparc64/src/ More formatting and indentation changes.  
2048 6529 d 4 h jermar /trunk/ Formatting and indentation changes.  
2047 6531 d 2 h jermar /trunk/kernel/arch/sparc64/include/ Convert sparc64 critical section barriers to RMO memory model.
More portable, no confusion from documentation.
 
2046 6531 d 4 h jermar /trunk/kernel/arch/sparc64/include/ Another comment fix.  
2045 6531 d 4 h jermar /trunk/kernel/arch/sparc64/include/ Fix comment.