| /* |
| * Copyright (c) 2015 Travis Geiselbrecht |
| * |
| * 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.h> |
| |
| .section ".vectors", "ax" |
| .globl _vectab |
| _vectab: |
| /* vector table here */ |
| # start vector |
| brai start |
| # user exception |
| brai unhandled_exception |
| # interrupt |
| brai microblaze_irq |
| # break |
| brai unhandled_exception |
| # hardware exception |
| brai unhandled_exception |
| |
| # reserved for future |
| .fill (0x50 - 0x28) |
| |
| .section ".text.boot" |
| FUNCTION(start) |
| # set the default stack |
| addik r1, r0, default_stack_top |
| |
| # set up small data pointers |
| addik r2, r0, _SDATA2_START__ |
| addik r13, r0, _SDATA_START__ |
| |
| # set the processor mode to default |
| mts rmsr, r0 |
| |
| # zero out bss sections |
| addik r5, r0, __bss_start |
| addik r6, r0, 0 |
| rsubik r7, r5, __bss_end |
| brlid r15, memset |
| nop |
| |
| # arguments to main |
| addik r5, r0, 1 |
| addik r6, r0, 2 |
| addik r7, r0, 3 |
| brlid r15, lk_main |
| addik r8, r0, 4 |
| |
| # shouldn't be here |
| bri . |
| |
| FUNCTION(unhandled_exception) |
| bri . |
| |
| .bss |
| .align 3 |
| LOCAL_DATA(default_stack) |
| .skip 4096 |
| LOCAL_DATA(default_stack_top) |
| |
| /* vim: set ts=4 sw=4 expandtab: */ |
| |