mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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85 lines
2 KiB
ArmAsm
85 lines
2 KiB
ArmAsm
/*
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* FreeRTOS V202104.00
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, 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 included in all
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://www.github.com/FreeRTOS
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*
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* 1 tab == 4 spaces!
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*/
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#include "riscv-virt.h"
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.section .init
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.globl _start
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.type _start,@function
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_start:
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.cfi_startproc
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.cfi_undefined ra
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.option push
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.option norelax
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la gp, __global_pointer$
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.option pop
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// Continue primary hart
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csrr a0, mhartid
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li a1, PRIM_HART
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bne a0, a1, secondary
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// Primary hart
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la sp, _stack_top
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// Load data section
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la a0, _data_lma
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la a1, _data
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la a2, _edata
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bgeu a1, a2, 2f
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1:
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LOAD t0, (a0)
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STOR t0, (a1)
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addi a0, a0, REGSIZE
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addi a1, a1, REGSIZE
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bltu a1, a2, 1b
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2:
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// Clear bss section
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la a0, _bss
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la a1, _ebss
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bgeu a0, a1, 2f
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1:
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STOR zero, (a0)
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addi a0, a0, REGSIZE
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bltu a0, a1, 1b
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2:
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// argc, argv, envp is 0
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li a0, 0
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li a1, 0
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li a2, 0
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jal main
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1:
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wfi
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j 1b
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secondary:
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// TODO: Multicore is not supported
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wfi
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j secondary
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.cfi_endproc
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