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| author | Daniel Cederman <cederman@gaisler.com> | 2017-07-13 09:26:50 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-07-17 07:41:38 +0200 |
| commit | 2f8704b6c8c3ce65cdf2b589a98de1d1d9dc8ffa (patch) | |
| tree | bd540adf388432ec7db34e5d2c4a3d4b8574b344 /cpukit/score/cpu/sparc/sparc-context-validate.S | |
| parent | psxtests: Add a mmap dedicated test case (diff) | |
| download | rtems-2f8704b6c8c3ce65cdf2b589a98de1d1d9dc8ffa.tar.bz2 | |
sparc: Add assembly workaround for LEON3FT B2BST errata
This patch adds NOP instructions to prevent instruction sequences
that are sensitive to the LEON3FT B2BST errata. See GRLIB-TN-0009:
"LEON3FT Stale Cache Entry After Store with Data Tag Parity Error"
for more information.
The sequences are only modified if __FIX_LEON3FT_B2BST is defined.
The patch works in conjunction with the -mfix-ut700, -mfix-gr712rc,
and -mfix-ut699 GCC flags that prevents the sensitive sequences from
being generated.
Update #3057.
Diffstat (limited to 'cpukit/score/cpu/sparc/sparc-context-validate.S')
| -rw-r--r-- | cpukit/score/cpu/sparc/sparc-context-validate.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/cpukit/score/cpu/sparc/sparc-context-validate.S b/cpukit/score/cpu/sparc/sparc-context-validate.S index e0724e0e94..777f4dd8a6 100644 --- a/cpukit/score/cpu/sparc/sparc-context-validate.S +++ b/cpukit/score/cpu/sparc/sparc-context-validate.S @@ -282,6 +282,7 @@ y_checking: nop st %o1, [%sp + FRAME_OFFSET_BUFFER_2] + SPARC_LEON3FT_B2BST_NOP /* Check floating point registers */ check_float_register %f31 check_float_register %f30 |