| Rev |
Age |
Author |
Path |
Log message |
Diff |
| 2141 |
6305 d 20 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 |
6307 d 0 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. |
|
| 2133 |
6307 d 0 h |
jermar |
/trunk/kernel/generic/src/mm/ |
Coding style and indentation fixes. |
|
| 2132 |
6308 d 6 h |
jermar |
/trunk/kernel/generic/src/mm/ |
Fix coding style in the address space area backends. |
|
| 2128 |
6349 d 0 h |
jermar |
/trunk/ |
Add arm32 architecture. The 32 suffix is used to specify that 16-bit Thumb
instructions are not used. The arm32 code is mostly composed of placeholders
that need to be replaced by real implementation. So far, the arm32 tree
only compiles. If run under GXEmul simulator, an infinit loop at the
kernel entry point will be entered. |
|
| 2126 |
6349 d 21 h |
decky |
/trunk/kernel/ |
small cleanup, more work coming |
|
| 2125 |
6349 d 23 h |
decky |
/trunk/ |
experimental support for Objective C
(disabled by default) |
|
| 2124 |
6350 d 1 h |
decky |
/trunk/kernel/generic/ |
implement simple realloc() |
|
| 2123 |
6356 d 4 h |
decky |
/trunk/kernel/generic/src/mm/ |
add forgotten unsigned |
|
| 2122 |
6356 d 4 h |
decky |
/trunk/kernel/generic/ |
explicit typecast, fix signed/unsigned comparison |
|
| 2121 |
6356 d 4 h |
decky |
/trunk/kernel/generic/src/mm/ |
remove anonymous structure, add static qualifier |
|
| 2106 |
6358 d 6 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. |
|
| 2094 |
6363 d 2 h |
decky |
/trunk/kernel/generic/ |
avoid conflict with potential keyword |
|
| 2089 |
6364 d 6 h |
decky |
/trunk/ |
huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes |
|
| 2087 |
6365 d 2 h |
jermar |
/trunk/kernel/ |
Indentaion and formatting changes even Martin will like :-) |
|
| 2083 |
6370 d 6 h |
decky |
/trunk/kernel/ |
typedef elimination |
|
| 2076 |
6373 d 7 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 |
6374 d 23 h |
jermar |
/trunk/ |
(c) versus (C) |
|
| 2069 |
6376 d 21 h |
jermar |
/trunk/ |
Improve formatting. |
|
| 2059 |
6398 d 8 h |
jermar |
/trunk/kernel/generic/ |
Improve indentation and formatting. |
|
| 2052 |
6404 d 2 h |
decky |
/trunk/kernel/generic/src/mm/ |
pretty-print slabs |
|
| 2048 |
6407 d 0 h |
jermar |
/trunk/ |
Formatting and indentation changes. |
|
| 2035 |
6410 d 4 h |
decky |
/trunk/kernel/generic/src/ |
more fancy kconsole output |
|
| 2015 |
6413 d 23 h |
jermar |
/trunk/ |
Rework support for virtually indexed cache.
Instead of repeatedly flushing the data cache, which was a huge overkill, refuse to create an illegal address alias
in the kernel (again) and allocate appropriate page color in userspace instead. Extend the detection also to
SYS_PHYSMEM_MAP syscall.
Add support for tracking physical memory areas mappable by SYS_PHYSMEM_MAP.
Lots of coding style changes. |
|
| 2009 |
6418 d 22 h |
jermar |
/trunk/kernel/ |
Initial support for handling illegal virtual aliases on sparc64. |
|
| 2007 |
6421 d 21 h |
jermar |
/trunk/kernel/ |
Introduce page colors. So far, only sparc64 uses correct page color bits. Other architectures have a dummy define
specifying zero bits for a page color.
There is a new check of page color in as_area_share(). Because of lack of support for this in the userspace, the
check has been #ifef'ed out. |
|
| 2000 |
6425 d 8 h |
decky |
/trunk/kernel/ |
move files to more proper locations |
|
| 1999 |
6425 d 8 h |
decky |
/trunk/ |
start RAM disk support |
|
| 1981 |
6435 d 7 h |
jermar |
/trunk/kernel/ |
Indentation, formatting and minor changes. |
|
| 1954 |
6457 d 22 h |
jermar |
/trunk/ |
Minor changes. Some coding style fixes and also a type (tee vs. tree).
One AS -> as change. |
|
| 1950 |
6462 d 2 h |
jermar |
/trunk/kernel/ |
Indentation changes and coding style fixes in slab.c and slab.h. |
|
| 1915 |
6475 d 23 h |
jermar |
/trunk/kernel/ |
A quote from from SPARC V9 specification:
The Y register is deprecated; it is provided only for compatibility with previous versions
of the architecture. It should not be used in new SPARC-V9 software. It is
recommended that all instructions that reference the Y register (i.e., SMUL,
SMULcc, UMUL, UMULcc, MULScc, SDIV, SDIVcc, UDIV, UDIVcc, RDY, and
WRY) be avoided. See the appropriate pages in Appendix A, “Instruction Definitions,”
for suitable substitute instructions.
Still gcc is generating code which uses Y and some of the instructions above.
This change modifies the preemptible_handler() to preserve the Y register
across preemption. |
|
| 1914 |
6476 d 5 h |
jermar |
/trunk/kernel/generic/ |
Add function for printing out info about address space. |
|
| 1904 |
6486 d 4 h |
jermar |
/trunk/kernel/ |
IPI/cross-call support for sparc64.
SMP on sparc64 is now fully supported. |
|
| 1894 |
6494 d 21 h |
jermar |
/trunk/ |
Add balloc() (a.k.a boot allocator):
- balloc() only needs to know how to allocate memory.
- Memory allocated via balloc() is supposed to be passed to kernel and never freed by boot itself.
- make kernel aware of boot allocations
More work on OFW device tree:
- use balloc() to efficiently and safely allocate memory for the canonical copy of the device tree
sparc64 boot:
- pass OFW device tree root node pointer to kernel |
|
| 1891 |
6495 d 21 h |
jermar |
/trunk/kernel/ |
sparc64 work:
- Experimental support for TSB (Translation Storage Buffer). |
|
| 1890 |
6496 d 8 h |
jermar |
/trunk/ |
- Create a dedicated slab cache for as_t objects and switch from malloc/free to slab_alloc/slab_free for
them.
- Slightly fix and improve both the kernel and userspace atomic_add() on sparc64.
- More TSB work on the sparc64 front. |
|
| 1889 |
6496 d 23 h |
jermar |
/trunk/kernel/ |
Fix bug in mm/as.c:
- as_area_destroy() should not work with AS but as
sparc64 work:
- start implementing TSB support |
|
| 1854 |
6516 d 8 h |
jermar |
/trunk/kernel/ |
Define architecture-specific thread sub-constructors and sub-destructors on all architectures.
Define the THREAD_FLAG_USPACE which means that the thread runs in user space.
The forementioned changes allow for allocating of user window buffer on sparc64
threads that execute in userspace.
A lot of formatting and indentation fixes. |
|
| 1851 |
6524 d 6 h |
jermar |
/trunk/kernel/ |
sparc64 work.
Define the istate structure.
Move the identity-mapping handler to assembly.
Make the preemptible handler more general so that TL=1 MMU exceptions can make use of it.
Little bit of formatting and indentation. |
|