diff options
Diffstat (limited to 'libgloss/sparc_leon/locore_svt_reset.S')
| -rw-r--r-- | libgloss/sparc_leon/locore_svt_reset.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libgloss/sparc_leon/locore_svt_reset.S b/libgloss/sparc_leon/locore_svt_reset.S new file mode 100644 index 000000000..cde9a7b09 --- /dev/null +++ b/libgloss/sparc_leon/locore_svt_reset.S @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2011 Aeroflex Gaisler + * + * BSD license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + + +#include <asm-leon/head.h> + + .section .text + /* ------- */ + .weak _hardreset_svt + .set _hardreset_svt, __hardreset_svt + /* ------- */ + .global _hardreset, _hardreset_svt_real + +! reset entry point for single vector trapping. Try enable svt +_hardreset_svt_real: + nop +__hardreset_svt: + mov %psr, %l3 + srl %l3, 24, %g5 + and %g5, 3, %g5 + subcc %g5, 3, %g0 ! leon2: 0 or 2, leon3: 3 + bne .L2 + nop + + mov %asr17, %g5 ! set svt + set 1<<13,%g1 + or %g5,%g1,%g5 + mov %g5, %asr17 + nop; nop; nop + mov %asr17,%g5 ! check svt + andcc %g5, %g1, %g0 + beq .L2 + nop + + set _hardreset,%l3 + jmp %l3 + nop + +.L2: ta 0x0 ! no svt implemented (ether leon2 or svt != 1) + nop + |