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riscv: Use SBI shutdown call to implement RB_POWEROFF

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Currently we only call sbi_shutdown in cpu_reset, which means we reach
"Please press any key to reboot." even when RB_POWEROFF is set, and only
once the user presses a key do we then shutdown. Instead, register a
shutdown_final event handler and make an SBI shutdown call if
RB_POWEROFF is set.

Reviewed by:	br, jhb (mentor), kp
Approved by:	br, jhb (mentor), kp
Differential Revision:	https://reviews.freebsd.org/D25183
This commit is contained in:
Jessica Clarke 2020-06-08 17:57:21 +00:00
parent 953171ba9e
commit e28d8a5b26
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361932
1 changed files with 19 additions and 0 deletions
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19
sys/riscv/riscv/sbi.c
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@ -29,8 +29,11 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/eventhandler.h>
#include <sys/reboot.h>
#include <machine/md_var.h>
#include <machine/sbi.h>
@ -80,6 +83,13 @@ sbi_get_mimpid(void)
return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MIMPID));
}
static void
sbi_shutdown_final(void *dummy __unused, int howto)
{
if ((howto & RB_POWEROFF) != 0)
sbi_shutdown();
}
void
sbi_print_version(void)
{
@ -187,3 +197,12 @@ sbi_init(void)
KASSERT(sbi_probe_extension(SBI_SHUTDOWN) != 0,
("SBI doesn't implement sbi_shutdown()"));
}
static void
sbi_late_init(void *dummy __unused)
{
EVENTHANDLER_REGISTER(shutdown_final, sbi_shutdown_final, NULL,
SHUTDOWN_PRI_LAST);
}
SYSINIT(sbi, SI_SUB_KLD, SI_ORDER_ANY, sbi_late_init, NULL);