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/*
* FreeRTOS V202107.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* 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.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
#include "riscv-virt.h"
.section .init
.globl _start
.type _start,@function
_start:
.cfi_startproc
.cfi_undefined ra
.option push
.option norelax
la gp, __global_pointer$
.option pop
// Continue primary hart
csrr a0, mhartid
li a1, PRIM_HART
bne a0, a1, secondary
// Primary hart
la sp, _stack_top
// Load data section
la a0, _data_lma
la a1, _data
la a2, _edata
bgeu a1, a2, 2f
1:
LOAD t0, (a0)
STOR t0, (a1)
addi a0, a0, REGSIZE
addi a1, a1, REGSIZE
bltu a1, a2, 1b
2:
// Clear bss section
la a0, _bss
la a1, _ebss
bgeu a0, a1, 2f
1:
STOR zero, (a0)
addi a0, a0, REGSIZE
bltu a0, a1, 1b
2:
// argc, argv, envp is 0
li a0, 0
li a1, 0
li a2, 0
jal main
1:
wfi
j 1b
secondary:
// TODO: Multicore is not supported
wfi
j secondary
.cfi_endproc
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