diff options
author | Alex White <alex.white@oarcorp.com> | 2021-09-30 23:57:01 -0500 |
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committer | Joel Sherrill <joel@rtems.org> | 2021-10-13 14:45:37 -0500 |
commit | d03776e804e2cb190442d2a2debf297714ca8049 (patch) | |
tree | 108aba7fb973915a52c407751ce23abf77eccac6 /bsps/microblaze/shared/start/start.S | |
parent | bsps: Add MicroBlaze FPGA BSP (diff) | |
download | rtems-d03776e804e2cb190442d2a2debf297714ca8049.tar.bz2 |
microblaze: Rework for RTEMS 6
This reworks the existing MicroBlaze architecture port and BSP to
achieve basic functionality using the latest RTEMS APIs.
Diffstat (limited to 'bsps/microblaze/shared/start/start.S')
-rw-r--r-- | bsps/microblaze/shared/start/start.S | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/bsps/microblaze/shared/start/start.S b/bsps/microblaze/shared/start/start.S new file mode 100644 index 0000000000..97250f9316 --- /dev/null +++ b/bsps/microblaze/shared/start/start.S @@ -0,0 +1,114 @@ +/* SPDX-License-Identifier: BSD-3-Clause */ + +/* Copyright (c) 2001, 2009 Xilinx, Inc. All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + + 1. Redistributions source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + 3. Neither the name of Xilinx nor the names of its contributors may be + used to endorse or promote products derived from this software without + specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + + XMD load *.elf error: + MicroBlaze Vector Map for standalone executables + + Address Vector type Label + ------- ----------- ------ + + # 0x00 # (-- IMM --) + # 0x04 # Reset _start1 + + # 0x08 # (-- IMM --) + # 0x0c # Software Exception _exception_handler + + # 0x10 # (-- IMM --) + # 0x14 # Hardware Interrupt _interrupt_handler + + # 0x18 # (-- IMM --) + # 0x1C # Breakpoint Exception (-- Don't Care --) + + # 0x20 # (-- IMM --) + # 0x24 # Hardware Exception _hw_exception_handler + +*/ + + + .globl _start + .section .vectors.reset, "ax" + .align 2 + .ent _start + .type _start, @function +_start: + brai _start1 + .end _start + + .section .vectors.sw_exception, "ax" + .align 2 +_vector_sw_exception: + brai _exception_handler + + .section .vectors.interrupt, "ax" + .align 2 +_vector_interrupt: + brai _interrupt_handler + + .section .vectors.hw_exception, "ax" + .align 2 +_vector_hw_exception: + brai _hw_exception_handler + + .section .text + .globl _start1 + .align 2 + .ent _start1 + .type _start1, @function +_start1: + //la r13, r0, _SDA_BASE_ /* Set the Small Data Anchors and the stack pointer */ + //la r2, r0, _SDA2_BASE_ + la r1, r0, _ISR_Stack_area_end-16 /* 16 bytes (4 words are needed by crtinit for args and link reg */ + + brlid r15, _crtinit /* Initialize BSS and run program */ + nop + +#ifndef __rtems__ + brlid r15, exit /* Call exit with the return value of main */ + addik r5, r3, 0 +#endif /* __rtems__ */ + + /* Control does not reach here */ + .end _start1 + +#ifndef __rtems__ +/* + _exit + Our simple _exit +*/ + .globl _exit + .align 2 + .ent _exit + .type _exit, @function +_exit: + bri 0 + .end _exit +#endif /* __rtems__ */ |