embox

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/**
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 * @file
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 *
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 * @date   08.10.2020
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 * @author Alexander Kalmuk
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 */
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.syntax unified
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.arch   armv8-m.main
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.equ RESET_STAT_REG, 0x500000BC
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.section text_retained
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.thumb
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.thumb_func
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.align  2
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.globl  wakeup_reset_handler
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.type   wakeup_reset_handler, %function
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wakeup_reset_handler:
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	ldr     r1, =RESET_STAT_REG
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	ldr     r2, [r1]
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	cbnz    r2, .cold_reset            /* if RESET_STAT_REG != 0 then jump to .cold_reset */
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	ldr     r3, =wakeup_from_deepsleep
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	bx      r3
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.cold_reset:
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	ldr     r3, =start
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	bx      r3
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.size   wakeup_reset_handler, . - wakeup_reset_handler
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.section .text
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.thumb
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.thumb_func
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.align  2
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.globl  set_wakeup_reset_handler
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.type   set_wakeup_reset_handler, %function
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set_wakeup_reset_handler:
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	ldr     r0, =0x20000004
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	ldr     r1, =wakeup_reset_handler
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	str     r1, [r0]
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	bx      lr
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.size   set_wakeup_reset_handler, . - set_wakeup_reset_handler
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