rockbox/firmware/target/arm/system-arm.h, branch master

Add CPU mode asserts to kernel on blocking functions.

2017-01-21T19:25:52+00:00

This scourge finds it's way back in far too often.
Right now, only defined for ARM.

Have fun!

Change-Id: Ib21be09ebf71dec10dc652a7a664779251f49644

Create fimrware/asm directory for assembly optimized stuff.

2012-01-22T17:46:44+00:00

This dir is suitable for stuff that doesn't fit the target tree, e.g. because
it also builds on hosted or otherwise. It also has a generic subfolder for
fallback C implementations so that not all archs need to provide asm files.

SOURCES should only contain "foo.c" where foo.c includes the specific
/foo.c files from the subdirs using the preprocessor. This way automatic
selection of asm versions or generic C verion is possible.

For the start, the thread support files are moved, since ASM threads can
be used on hosted platforms as well. Since core_sleep() remains platform
specific it's moved to the corresponding system.h headers.

Change-Id: Iebff272f3407a6eaafeb7656ceb0ae9eca3f7cb9

AS3525v1/2: Enable nested handling of interrupts

2012-01-08T22:29:25+00:00

Mostly for the sake of reducing latency for audio servicing where other service
routines can take a long time to complete, leading to occasional drops of a
few samples, especially in recording, where they are fairly frequent.

One mystery that remains is GPIOA IRQ being interrupted causes strange
undefined instruction exceptions, most easily produced on my Fuze V2 with a
scrollwheel. Making GPIOA the top ISR for now, thus not interruptible, cures it.

SVC mode is used during the actual calls. Hopefully the SVC stack size is
sufficient. Prologue and epilogue code only uses the IRQ stack and is large
enough.

Any routine code that should not be interrupted should disable IRQ itself from
here on in.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31642 a1c6a512-1295-4272-9138-f99709370657

Merge functionality of wakeups and semaphores-- fewer APIs and object types. semaphore_wait takes a timeout now so codecs and plugins have to be made incompatible. Don't make semaphores for targets not using them.

2011-03-02T08:49:38+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29492 a1c6a512-1295-4272-9138-f99709370657

Byteswap routines don't really need 'asm volatile', just 'asm' since it should be safe to move them for optimizing. Clean up the line endings for ARM.

2011-02-25T00:46:39+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29394 a1c6a512-1295-4272-9138-f99709370657

Use thumb-compatible byte swap routines when building with -mthumb.

2011-02-24T23:12:00+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29391 a1c6a512-1295-4272-9138-f99709370657

Use __builtin_constant_p() to select the best byteswapping method: constant or target optimized. Same macro can then be used for constant values and inits as well as non-constant.

2011-01-30T00:58:45+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29171 a1c6a512-1295-4272-9138-f99709370657

Change "r" back to "i" (i is for immediate, so no syntax error) and reclaim a bit binsize. Live with that those function don't build with -O0 since they rely on inlining.

2009-11-15T22:29:22+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23641 a1c6a512-1295-4272-9138-f99709370657

Fix a few possible problems discovered in -O0 / eabi experiments.

2009-11-15T17:23:25+00:00

- two essential parts of Sansa AMS drivers are optimzed away in newer gcc, so mark them volatile.
- use "r" instead of "i" (which is apparently invalid syntax) for the input list in some inline assembly

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23634 a1c6a512-1295-4272-9138-f99709370657

ARMv6: Optimize interrupt enable/disable with cpsie and cpsid. Section off system-arm.h by ARM_ARCH rather than checking within each implementation.

2009-02-02T03:51:50+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19905 a1c6a512-1295-4272-9138-f99709370657