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lib: Send IPI for all harts to hang on system shutdown

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In case the platform specific method for shutting down
the system fails (or is not implemented), at least make
sure that all harts hang instead of just the current hart.

Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
This commit is contained in:
Nick Kossifidis
2019-02-17 03:52:44 +02:00
committed by Anup Patel
parent 16426420b5
commit b44878b773
1 changed files with 8 additions and 0 deletions
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8
lib/sbi_system.c
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@@ -5,11 +5,13 @@
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
* Nick Kossifidis <mick@ics.forth.gr>
*/
#include <sbi/sbi_hart.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_ipi.h>
int sbi_system_early_init(struct sbi_scratch *scratch, bool cold_boot)
{
@@ -34,6 +36,12 @@ void __attribute__((noreturn)) sbi_system_reboot(struct sbi_scratch *scratch,
void __attribute__((noreturn)) sbi_system_shutdown(struct sbi_scratch *scratch,
u32 type)
{
/* First try the platform-specific method */
sbi_platform_system_shutdown(sbi_platform_ptr(scratch), type);
/* If that fails (or is not implemented) send an IPI on every
* hart to hang and then hang the current hart */
sbi_ipi_send_many(scratch, NULL, SBI_IPI_EVENT_HALT);
sbi_hart_hang();
}