diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2012-12-05 07:15:24 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2012-12-08 18:48:26 +0000 |
| commit | b7909d81f7658f64bba0faed83e7c2fd6a52fcba (patch) | |
| tree | 532268ec2f2f26c3321770fe23a4f7fab68cd6f5 /target-xtensa | |
| parent | 53593e90d13264dc88b3281ddf75ceaa641df05a (diff) | |
target-xtensa: implement MISC SR
The Miscellaneous Special Registers Option provides zero to four scratch
registers within the processor readable and writable by RSR, WSR, and
XSR. These registers are privileged. They may be useful for some
application-specific exception and interrupt processing tasks in the
kernel. The MISC registers are undefined after reset.
See ISA, 4.7.3 for details.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-xtensa')
| -rw-r--r-- | target-xtensa/cpu.h | 1 | ||||
| -rw-r--r-- | target-xtensa/overlay_tool.h | 1 | ||||
| -rw-r--r-- | target-xtensa/translate.c | 4 |
3 files changed, 6 insertions, 0 deletions
diff --git a/target-xtensa/cpu.h b/target-xtensa/cpu.h index a73d32d898..08fd5bc395 100644 --- a/target-xtensa/cpu.h +++ b/target-xtensa/cpu.h @@ -153,6 +153,7 @@ enum { ICOUNTLEVEL = 237, EXCVADDR = 238, CCOMPARE = 240, + MISC = 244, }; #define PS_INTLEVEL 0xf diff --git a/target-xtensa/overlay_tool.h b/target-xtensa/overlay_tool.h index 0b47029f8c..dd4f51a7b7 100644 --- a/target-xtensa/overlay_tool.h +++ b/target-xtensa/overlay_tool.h @@ -95,6 +95,7 @@ /* Other, TODO */ \ XCHAL_OPTION(XCHAL_HAVE_WINDOWED, XTENSA_OPTION_WINDOWED_REGISTER) | \ XCHAL_OPTION(XCHAL_HAVE_DEBUG, XTENSA_OPTION_DEBUG) |\ + XCHAL_OPTION(XCHAL_NUM_MISC_REGS > 0, XTENSA_OPTION_MISC_SR) | \ XCHAL_OPTION(XCHAL_HAVE_THREADPTR, XTENSA_OPTION_THREAD_POINTER) | \ XCHAL_OPTION(XCHAL_HAVE_PRID, XTENSA_OPTION_PROCESSOR_ID)) diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index 3303e5f693..52edcefb05 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -179,6 +179,10 @@ static const XtensaReg sregnames[256] = { XTENSA_OPTION_TIMER_INTERRUPT), [CCOMPARE + 2] = XTENSA_REG("CCOMPARE2", XTENSA_OPTION_TIMER_INTERRUPT), + [MISC] = XTENSA_REG("MISC0", XTENSA_OPTION_MISC_SR), + [MISC + 1] = XTENSA_REG("MISC1", XTENSA_OPTION_MISC_SR), + [MISC + 2] = XTENSA_REG("MISC2", XTENSA_OPTION_MISC_SR), + [MISC + 3] = XTENSA_REG("MISC3", XTENSA_OPTION_MISC_SR), }; static const XtensaReg uregnames[256] = { |