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| author | Daniel Hellstrom <daniel@gaisler.com> | 2014-12-03 11:35:52 +0100 |
|---|---|---|
| committer | Daniel Hellstrom <daniel@gaisler.com> | 2014-12-04 12:51:11 +0100 |
| commit | dff1803cfbec3775fff1b9c34cc707c05494dc3b (patch) | |
| tree | dbb8850d94b30f8388f9e3df9a68fc6c99855f74 /c/src/lib/libbsp/sparc/leon3/startup/spurious.c | |
| parent | pc386 bsp fix for default mode (diff) | |
| download | rtems-dff1803cfbec3775fff1b9c34cc707c05494dc3b.tar.bz2 | |
SPARC: optimize IRQ enable & disable
* Coding style cleanups.
* Use OS reserved trap 0x89 for IRQ Disable
* Use OS reserved trap 0x8A for IRQ Enable
* Add to SPARC CPU supplement documentation
This will result in faster Disable/Enable code since the
system trap handler does not need to decode which function
the user wants. Besides the IRQ disable/enabled can now
be inline which avoids the caller to take into account that
o0-o7+g1-g4 registers are destroyed by trap handler.
It was also possible to reduce the interrupt trap handler by
five instructions due to this.
Diffstat (limited to 'c/src/lib/libbsp/sparc/leon3/startup/spurious.c')
| -rw-r--r-- | c/src/lib/libbsp/sparc/leon3/startup/spurious.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/c/src/lib/libbsp/sparc/leon3/startup/spurious.c b/c/src/lib/libbsp/sparc/leon3/startup/spurious.c index a29f113226..8801f6e933 100644 --- a/c/src/lib/libbsp/sparc/leon3/startup/spurious.c +++ b/c/src/lib/libbsp/sparc/leon3/startup/spurious.c @@ -18,6 +18,7 @@ */ #include <bsp.h> +#include <rtems/score/cpu.h> #include <rtems/bspIo.h> void _CPU_Exception_frame_print( const CPU_Exception_frame *frame ) @@ -146,14 +147,15 @@ void bsp_spurious_initialize() /* * Skip window overflow, underflow, and flush as well as software - * trap 0 which we will use as a shutdown. Also avoid trap 0x70 - 0x7f - * which cannot happen and where some of the space is used to pass - * paramaters to the program. + * trap 0,9,10 which we will use as a shutdown, IRQ disable, IRQ enable. + * Also avoid trap 0x70 - 0x7f which cannot happen and where some of the + * space is used to pass paramaters to the program. */ - if (( trap == 5 || trap == 6 ) || + if (( trap == 5 ) || ( trap == 6 ) || (( trap >= 0x11 ) && ( trap <= 0x1f )) || - (( trap >= 0x70 ) && ( trap <= 0x83 ))) + (( trap >= 0x70 ) && ( trap <= 0x83 )) || + ( trap == SPARC_SWTRAP_IRQDIS ) || ( trap == SPARC_SWTRAP_IRQEN )) continue; set_vector( |