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Add support for SMCCC_VERSION in PSCI features 

On some platforms it may be necessary to discover the SMCCC version
via a PSCI features call.

Change-Id: I95281ac2263ca9aefda1809eb03464fbdb8ac24d
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
This commit is contained in:
Dimitris Papastamos 2018-01-22 12:58:52 +00:00
parent 3a1b0676c7
commit 6eabbb07d7
1 changed files with 5 additions and 1 deletions
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6
lib/psci/psci_main.c
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@ -1,11 +1,12 @@
/*
* Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <arch_helpers.h>
#include <arm_arch_svc.h>
#include <assert.h>
#include <debug.h>
#include <platform.h>
@ -322,6 +323,9 @@ int psci_features(unsigned int psci_fid)
{
unsigned int local_caps = psci_caps;
if (psci_fid == SMCCC_VERSION)
return PSCI_E_SUCCESS;
/* Check if it is a 64 bit function */
if (((psci_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_64)
local_caps &= PSCI_CAP_64BIT_MASK;