diff options
Diffstat (limited to 'libgloss/sparc_leon/contextswitch.c')
| -rw-r--r-- | libgloss/sparc_leon/contextswitch.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/libgloss/sparc_leon/contextswitch.c b/libgloss/sparc_leon/contextswitch.c new file mode 100644 index 000000000..7aafec41f --- /dev/null +++ b/libgloss/sparc_leon/contextswitch.c @@ -0,0 +1,121 @@ +/* + * 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/irq.h> +#include <asm-leon/irq.h> +#include <asm-leon/time.h> +#include <asm-leon/contextswitch.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 */ + +int +_do_thread_setjmp (threadctx_t env, unsigned int savesigs) +{ + +#ifndef _FLAT + /* first restore should trap */ + env[THREAD_JB_WIM] = 1 << ((env[THREAD_JB_PSR] & SPARC_PSR_WIN_MASK) + 1); + env[THREAD_JB_WIM] |= env[THREAD_JB_WIM] >> SPARC_NUM_REGWIN; +#else + env[THREAD_JB_WIM] = 0; +#endif + +#ifndef _SOFT_FLOAT + env[THREAD_JB_FPUCTX] = fpustate_current; +#endif + return 0; +} + +void +thread_longjmp (threadctx_t env, int val) +{ + + if (!val) + val = 1; + +#ifndef _SOFT_FLOAT + fpustate_current = env[THREAD_JB_FPUCTX]; +#endif + + _switch_to (env, val); + +/* __asm__ __volatile__( \ */ +/* " mov %8,%%i0 /\* propagate on restore *\/ \n\t"\ */ +/* " mov %0,%%i1 /\* propagate on restore *\/ \n\t"\ */ +/* " restore \n\t"\ */ +/* " mov %%o0,%%g6 \n\t"\ */ +/* " mov %%o1,%%g3 /\* former %%i1 (val) *\/ \n\t"\ */ +/* " \n\t"\ */ +/* " !ta 0x03 /\* flush registers *\/ \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " save %%sp, %7, %%sp \n\t"\ */ +/* " \n\t"\ */ +/* " ldd [%%g6+%5], %%g4 /\* load psr,wim *\/ \n\t"\ */ +/* " wr %%g4, 0x20, %%psr \n\t"\ */ +/* " nop \n\t"\ */ +/* " nop \n\t"\ */ +/* " nop \n\t"\ */ +/* " ldd [%%g6 +%1], %%sp /\* load sp, pc to jump to *\/ \n\t"\ */ +/* " wr %%g5, 0x0, %%wim \n\t"\ */ +/* " \n\t"\ */ +/* " ldd [%%sp], %%l0 /\* restore window *\/ \n\t"\ */ +/* " ldd [%%sp+8], %%l2 \n\t"\ */ +/* " ldd [%%sp+16], %%l4 \n\t"\ */ +/* " ldd [%%sp+24], %%l6 \n\t"\ */ +/* " \n\t"\ */ +/* " ldd [%%sp+32], %%i0 \n\t"\ */ +/* " ldd [%%sp+40], %%i2 \n\t"\ */ +/* " ldd [%%sp+48], %%i4 \n\t"\ */ +/* " ldd [%%sp+56], %%i6 \n\t"\ */ +/* " wr %%g4, 0x00, %%psr \n\t"\ */ +/* " nop \n\t"\ */ +/* " nop \n\t"\ */ +/* " nop \n\t"\ */ +/* " \n\t"\ */ +/* " jmp %%o7 + 8 /\* success *\/ \n\t"\ */ +/* " mov %%g3, %%o0 /\* return %%g3 *\/ \n\t"\ */ +/* : : /\* %0 *\/ "r" (val), \ */ +/* /\* %1 *\/ "i" (sizeof(int) * THREAD_JB_SP), \ */ +/* /\* %2 *\/ "i" (sizeof(int) * THREAD_JB_I7), \ */ +/* /\* %3 *\/ "i" (sizeof(int) * THREAD_JB_FP), \ */ +/* /\* %4 *\/ "i" (sizeof(int) * THREAD_JB_PC), \ */ +/* /\* %5 *\/ "i" (sizeof(int) * THREAD_JB_PSR), \ */ +/* /\* %6 *\/ "i" (sizeof(int) * THREAD_JB_WIM), \ */ +/* /\* %7 *\/ "i" (-SF_REGS_SZ), \ */ +/* /\* %8 *\/ "r" (env) ); */ + + /* never come here */ +} |