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| author | Christian Mauderer <Christian.Mauderer@embedded-brains.de> | 2014-06-02 16:31:51 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-06-03 08:35:47 +0200 |
| commit | 8df1f408fd8c4f67629f32470b5b7d94123bc305 (patch) | |
| tree | c64a21cd0f587bae7926c2ff4d7349df026249e3 /c/src/lib/libcpu/sparc/syscall | |
| parent | libblock: Avoid recursive mutex (diff) | |
| download | rtems-8df1f408fd8c4f67629f32470b5b7d94123bc305.tar.bz2 | |
score/sparc: Add support for paravirtualization
Guest systems in paravirtualization environments run usually in user
mode. Thus it is not possible to directly access the PSR and TBR
registers. Use functions instead of inline assembler to access these
registers if RTEMS_PARAVIRT is defined.
Diffstat (limited to 'c/src/lib/libcpu/sparc/syscall')
| -rw-r--r-- | c/src/lib/libcpu/sparc/syscall/syscall.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/sparc/syscall/syscall.S b/c/src/lib/libcpu/sparc/syscall/syscall.S index a36ffaf220..9ce7fa54ef 100644 --- a/c/src/lib/libcpu/sparc/syscall/syscall.S +++ b/c/src/lib/libcpu/sparc/syscall/syscall.S @@ -83,4 +83,40 @@ SYM(sparc_syscall_exit): mov %o1, %g3 ! Additional exit code 2 ta 0 +#if defined(RTEMS_PARAVIRT) + + PUBLIC(_SPARC_Get_PSR) + +SYM(_SPARC_Get_PSR): + + retl + rd %psr, %o0 + + PUBLIC(_SPARC_Set_PSR) + +SYM(_SPARC_Set_PSR): + + mov %o0, %psr + nop + nop + nop + retl + nop + + PUBLIC(_SPARC_Get_TBR) + +SYM(_SPARC_Get_TBR): + + retl + rd %tbr, %o0 + + PUBLIC(_SPARC_Set_TBR) + +SYM(_SPARC_Set_TBR): + + retl + wr %o0, 0, %tbr + +#endif /* defined(RTEMS_PARAVIRT) */ + /* end of file */ |