6f4183bc9a
The qemu target has 128KB of ram at 0 and the rest at 0x90000000. Split the binary so that the vector table lives at 0 and everything else in the high address.
83 lines
2.2 KiB
ArmAsm
83 lines
2.2 KiB
ArmAsm
/*
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* Copyright (c) 2015 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <asm.h>
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.section ".vectors", "ax"
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.globl _vectab
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_vectab:
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/* vector table here */
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# start vector
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brai start
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# user exception
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brai unhandled_exception
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# interrupt
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brai microblaze_irq
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# break
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brai unhandled_exception
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# hardware exception
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brai unhandled_exception
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# reserved for future
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.fill (0x50 - 0x28)
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.section ".text.boot"
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FUNCTION(start)
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# set the default stack
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addik r1, r0, default_stack_top
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# set up small data pointers
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addik r2, r0, _SDATA2_START__
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addik r13, r0, _SDATA_START__
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# set the processor mode to default
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mts rmsr, r0
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# zero out bss sections
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addik r5, r0, __bss_start
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addik r6, r0, 0
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rsubik r7, r5, __bss_end
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brlid r15, memset
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nop
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# arguments to main
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addik r5, r0, 1
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addik r6, r0, 2
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addik r7, r0, 3
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brlid r15, lk_main
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addik r8, r0, 4
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# shouldn't be here
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bri .
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FUNCTION(unhandled_exception)
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bri .
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.bss
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.align 3
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LOCAL_DATA(default_stack)
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.skip 4096
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LOCAL_DATA(default_stack_top)
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/* vim: set ts=4 sw=4 expandtab: */
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