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arch: riscv32: support CONFIG_WDOG_INIT

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Borrow from an Arm Cortex-M convention where each Kconfig.soc can
define a 'config WDOG_INIT' that does watchdog initialization early in
the boot process if that SoC needs it.

Some SoCs have watchdogs that are enabled by default and need to be
turned off during reset handling (to be re-enabled if necessary by a
Zephyr watchdog driver).

Signed-off-by: Marti Bolivar <marti@foundries.io>
This commit is contained in:
Marti Bolivar 2018-11-13 14:37:41 -07:00 committed by Anas Nashif
parent ef765b28cb
commit 449170548b
1 changed files with 4 additions and 0 deletions
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4
arch/riscv32/core/reset.S
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@ -53,6 +53,10 @@ aa_loop:
li t0, CONFIG_ISR_STACK_SIZE
add sp, sp, t0
#ifdef CONFIG_WDOG_INIT
call _WdogInit
#endif
/*
* Jump into C domain. _PrepC zeroes BSS, copies rw data into RAM,
* and then enters kernel _Cstart