| /* |
| * 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. |
| */ |
| |
| |
| #ifndef _SYS_STACK_H_ |
| #define _SYS_STACK_H_ |
| |
| #if !defined(_ASM) |
| #include <sys/types.h> |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /* |
| * A stack frame looks like: |
| * |
| * %fp->| | |
| * |-------------------------------| |
| * | Locals, temps, saved floats | |
| * |-------------------------------| |
| * | outgoing parameters past 6 | |
| * |-------------------------------|-\ |
| * | 6 words for callee to dump | | |
| * | register arguments | | |
| * |-------------------------------| > minimum stack frame |
| * | One word struct-ret address | | |
| * |-------------------------------| | |
| * | 16 words to save IN and | | |
| * %sp->| LOCAL register on overflow | | |
| * |-------------------------------|-/ |
| */ |
| |
| /* |
| * Constants defining a 32-bit stack frame. |
| */ |
| #define WINDOWSIZE (16*4) /* size of window save area */ |
| #define ARGPUSHSIZE (6*4) /* size of arg dump area */ |
| #define ARGPUSH (WINDOWSIZE + 4) /* arg dump area offset */ |
| #define MINFRAME (WINDOWSIZE + ARGPUSHSIZE + 4) /* min frame */ |
| |
| #define STACK_GROWTH_DOWN /* stacks grow from high to low addresses */ |
| |
| /* |
| * Stack alignment macros. |
| */ |
| #define STACK_ALIGN 8 |
| #define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1)) |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _SYS_STACK_H */ |
