diff options
Diffstat (limited to 'c/src/lib/libbsp/microblaze/microblaze_fpga/startup/sim-crtinit.S')
| -rw-r--r-- | c/src/lib/libbsp/microblaze/microblaze_fpga/startup/sim-crtinit.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/microblaze/microblaze_fpga/startup/sim-crtinit.S b/c/src/lib/libbsp/microblaze/microblaze_fpga/startup/sim-crtinit.S new file mode 100644 index 0000000000..0cefb63116 --- /dev/null +++ b/c/src/lib/libbsp/microblaze/microblaze_fpga/startup/sim-crtinit.S @@ -0,0 +1,85 @@ +## Copyright (c) 2015, Hesham Almatary +## 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. +# +# +# sim-crtinit.s +# +# Default second stage of C run-time initialization that does not peform +# BSS initialization to zero. Typical use is on a simulator. +# + + .globl _crtinit + .align 2 + .ent _crtinit + +_crtinit: + addi r1, r1, -20 /* Save Link register */ + swi r15, r1, 0 + +#ifndef __rtems__ + brlid r15, _program_init /* Initialize the program */ + nop + + brlid r15, __init /* Invoke language initialization functions */ + nop +#endif + + + /* Init .bss */ + addi r6, r0, bsp_section_bss_begin + addi r7, r0, bsp_section_bss_end + +_clear_bss_loop: + swi r0, r6, 0 + + addi r6, r6, 4 + cmpu r8, r6, r7 + bgti r8, _clear_bss_loop + + addi r6, r0, 0 /* Initialize argc = 1 and argv = NULL and envp = NULL */ + addi r7, r0, 0 + brlid r15, boot_card /* Execute the program */ + addi r5, r0, 0 + + addik r19, r3, 0 /* Save return value */ + +#ifndef __rtems__ + brlid r15, __fini /* Invoke language cleanup functions */ + nop + + brlid r15, _program_clean /* Cleanup the program */ + nop +#endif + + lw r15, r1, r0 /* Return back to CRT */ + addik r3, r19, 0 /* Restore return value */ + rtsd r15, 8 + addi r1, r1, 20 + .end _crtinit |