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bsps/powerpc: Fix AltiVec enable

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There must be an isync after the mtmsr to ensure that the AltiVec is
enabled for subsequent instructions.

Close #2760.
This commit is contained in:
Sebastian Huber
2016-07-12 10:02:40 +02:00
parent 3f72dda6ee
commit c6c4fce942
3 changed files with 3 additions and 0 deletions
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1
c/src/lib/libbsp/powerpc/mvme5500/start/start.S
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@@ -68,6 +68,7 @@ __rtems_entry_point:
mfmsr r0 mfmsr r0
oris r0, r0, (1<<(31-16-6)) oris r0, r0, (1<<(31-16-6))
mtmsr r0 mtmsr r0
isync
/* /*
* set vscr and vrsave to known values * set vscr and vrsave to known values
*/ */

1
c/src/lib/libbsp/powerpc/psim/start/start.S
View File

@@ -103,6 +103,7 @@ _start:
mfmsr r0 mfmsr r0
oris r0, r0, (1<<(31-16-6)) oris r0, r0, (1<<(31-16-6))
mtmsr r0 mtmsr r0
isync
/* /*
* set vscr and vrsave to known values * set vscr and vrsave to known values
*/ */

1
c/src/lib/libbsp/powerpc/shared/start/start.S
View File

@@ -64,6 +64,7 @@ __rtems_entry_point:
mfmsr r0 mfmsr r0
oris r0, r0, (1<<(31-16-6)) oris r0, r0, (1<<(31-16-6))
mtmsr r0 mtmsr r0
isync
/* /*
* set vscr and vrsave to known values * set vscr and vrsave to known values
*/ */