| /* |
| * 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/leon.h> |
| #include <asm-leon/leonstack.h> |
| #include <asm-leon/contextswitch.h> |
| #include <asm-leon/winmacros.h> |
| |
| /* This asm code relies on the following offsets (setjmp.h): |
| #define THREAD_JB_SP 0 |
| #define THREAD_JB_PC 1 |
| #define THREAD_JB_PSR 8 |
| #define THREAD_JB_WIM 9 */ |
| |
| /* Number of register windows */ |
| .global _nwindows_min1, _nwindows |
| |
| .text |
| .global _switch_to |
| _switch_to: |
| |
| #ifndef _FLAT |
| !mov %o0,%i0 /* propagate env on restore */ |
| !mov %o1,%i1 /* propagate val on restore */ |
| !restore |
| mov %o0,%g7 |
| mov %o1,%g3 /* former %%i1 (val) */ |
| |
| sethi %hi(_nwindows_min1), %g4 /* flush registers */ |
| ld [%g4+%lo(_nwindows_min1)], %g4 |
| 1: save %sp, -SF_REGS_SZ, %sp !NWINDOWS-1 times |
| sub %g4,1,%g4 |
| cmp %g0,%g4 |
| bne 1b |
| nop |
| #else |
| mov %o0,%g7 |
| mov %o1,%g3 /* former %%i1 (val) */ |
| RW_STORE(sp) |
| #endif |
| |
| ldd [%g7+THREAD_JB_PSR*4], %g4 /* load psr,wim */ |
| wr %g4, 0x20, %psr |
| nop |
| nop |
| nop |
| ldd [%g7 +THREAD_JB_SP*4], %sp /* load sp, pc to jump to */ |
| wr %g5, 0x0, %wim |
| |
| RW_LOAD(sp) /* restore window */ |
| wr %g4, 0x00, %psr |
| nop |
| nop |
| nop |
| |
| jmp %o7 + 8 /* success */ |
| mov %g3, %o0 /* return %%g3 */ |
| |
| |
| |
| .text |
| .global thread_setjmp, _do_thread_setjmp |
| thread_setjmp: |
| |
| #ifdef _FLAT |
| RW_STORE(sp) /* store window */ |
| #endif |
| |
| ! RW_STORE(sp) /* store window for _FLAT and normal, SWITCH_TO_STACK in pthread need this*/ |
| |
| mov %psr,%o2 |
| #ifndef _SOFT_FLOAT |
| set 0x1000,%o3 |
| andn %o2,%o3,%o2 !disable fpu |
| #endif |
| std %sp,[%o0] !THREAD_JB_SP |
| st %o2,[%o0+(8*4)] !THREAD_JB_PSR |
| ba _do_thread_setjmp |
| nop |
