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a5ds: Add handler for when user tries to switch off secondary cores 

a5ds only has always-on power domain and there is no power control
present. However, without the pwr_domain_off handler, the kernel
panics when the user will try to switch off secondary cores. The
a5ds_pwr_domain_off handler will prevent kernel from crashing,
i.e. the kernel will attempt but fail to shut down the secondary CPUs
if the user tries to switch them offline.

Change-Id: I3c2239a1b6f035113ddbdda063c8495000cbe30c
Signed-off-by: Usama Arif <usama.arif@arm.com>
This commit is contained in:
Usama Arif 2019-09-26 16:07:53 +01:00
parent ace23683be
commit 59ffec157c
1 changed files with 15 additions and 1 deletions
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16
plat/arm/board/a5ds/a5ds_pm.c
View File

@ -3,6 +3,7 @@
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <lib/psci/psci.h>
#include <plat/arm/common/plat_arm.h>
@ -39,6 +40,18 @@ void a5ds_pwr_domain_on_finish(const psci_power_state_t *target_state)
gicv2_cpuif_enable();
}
/*******************************************************************************
* Platform handler called when a power domain is about to be turned off. The
* target_state encodes the power state that each level should transition to.
* a5ds only has always-on power domain and there is no power control present.
******************************************************************************/
void a5ds_pwr_domain_off(const psci_power_state_t *target_state)
{
ERROR("CPU_OFF not supported on this platform\n");
assert(false);
panic();
}
/*******************************************************************************
* Export the platform handlers via a5ds_psci_pm_ops. The ARM Standard
* platform layer will take care of registering the handlers with PSCI.
@ -47,7 +60,8 @@ plat_psci_ops_t a5ds_psci_pm_ops = {
/* dummy struct */
.validate_ns_entrypoint = NULL,
.pwr_domain_on = a5ds_pwr_domain_on,
.pwr_domain_on_finish = a5ds_pwr_domain_on_finish
.pwr_domain_on_finish = a5ds_pwr_domain_on_finish,
.pwr_domain_off = a5ds_pwr_domain_off
};
int __init plat_setup_psci_ops(uintptr_t sec_entrypoint,