trusty-fiq-arm.c
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/*
* Copyright (C) 2013 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <asm/fiq_glue.h>
#include <linux/platform_device.h>
#include <linux/trusty/smcall.h>
#include <linux/trusty/trusty.h>
#include "trusty-fiq.h"
#define _STRINGIFY(x) #x
#define STRINGIFY(x) _STRINGIFY(x)
static void __naked trusty_fiq_return(void)
{
asm volatile(
".arch_extension sec\n"
"mov r12, r0\n"
"ldr r0, =" STRINGIFY(SMC_FC_FIQ_EXIT) "\n"
"smc #0");
}
int trusty_fiq_arch_probe(struct platform_device *pdev)
{
return fiq_glue_set_return_handler(trusty_fiq_return);
}
void trusty_fiq_arch_remove(struct platform_device *pdev)
{
fiq_glue_clear_return_handler(trusty_fiq_return);
}