17c88f3f6SAchin Gupta/* 27c88f3f6SAchin Gupta * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. 37c88f3f6SAchin Gupta * 47c88f3f6SAchin Gupta * Redistribution and use in source and binary forms, with or without 57c88f3f6SAchin Gupta * modification, are permitted provided that the following conditions are met: 67c88f3f6SAchin Gupta * 77c88f3f6SAchin Gupta * Redistributions of source code must retain the above copyright notice, this 87c88f3f6SAchin Gupta * list of conditions and the following disclaimer. 97c88f3f6SAchin Gupta * 107c88f3f6SAchin Gupta * Redistributions in binary form must reproduce the above copyright notice, 117c88f3f6SAchin Gupta * this list of conditions and the following disclaimer in the documentation 127c88f3f6SAchin Gupta * and/or other materials provided with the distribution. 137c88f3f6SAchin Gupta * 147c88f3f6SAchin Gupta * Neither the name of ARM nor the names of its contributors may be used 157c88f3f6SAchin Gupta * to endorse or promote products derived from this software without specific 167c88f3f6SAchin Gupta * prior written permission. 177c88f3f6SAchin Gupta * 187c88f3f6SAchin Gupta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 197c88f3f6SAchin Gupta * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 207c88f3f6SAchin Gupta * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 217c88f3f6SAchin Gupta * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 227c88f3f6SAchin Gupta * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 237c88f3f6SAchin Gupta * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 247c88f3f6SAchin Gupta * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 257c88f3f6SAchin Gupta * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 267c88f3f6SAchin Gupta * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 277c88f3f6SAchin Gupta * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 287c88f3f6SAchin Gupta * POSSIBILITY OF SUCH DAMAGE. 297c88f3f6SAchin Gupta */ 307c88f3f6SAchin Gupta 317c88f3f6SAchin Gupta#include <tsp.h> 32*0a30cf54SAndrew Thoelke#include <asm_macros.S> 337c88f3f6SAchin Gupta 347c88f3f6SAchin Gupta .globl tsp_get_magic 357c88f3f6SAchin Gupta 367c88f3f6SAchin Gupta 377c88f3f6SAchin Gupta/* 387c88f3f6SAchin Gupta * This function raises an SMC to retrieve arguments from secure 397c88f3f6SAchin Gupta * monitor/dispatcher, saves the returned arguments the array received in x0, 407c88f3f6SAchin Gupta * and then returns to the caller 417c88f3f6SAchin Gupta */ 42*0a30cf54SAndrew Thoelkefunc tsp_get_magic 437c88f3f6SAchin Gupta /* Save address to stack */ 447c88f3f6SAchin Gupta stp x0, xzr, [sp, #-16]! 457c88f3f6SAchin Gupta 467c88f3f6SAchin Gupta /* Load arguments */ 477c88f3f6SAchin Gupta ldr w0, _tsp_fid_get_magic 487c88f3f6SAchin Gupta 497c88f3f6SAchin Gupta /* Raise SMC */ 507c88f3f6SAchin Gupta smc #0 517c88f3f6SAchin Gupta 527c88f3f6SAchin Gupta /* Restore address from stack */ 537c88f3f6SAchin Gupta ldp x4, xzr, [sp], #16 547c88f3f6SAchin Gupta 557c88f3f6SAchin Gupta /* Store returned arguments to the array */ 567c88f3f6SAchin Gupta stp x0, x1, [x4, #0] 577c88f3f6SAchin Gupta 587c88f3f6SAchin Gupta ret 597c88f3f6SAchin Gupta 607c88f3f6SAchin Gupta .align 2 617c88f3f6SAchin Gupta_tsp_fid_get_magic: 627c88f3f6SAchin Gupta .word TSP_GET_ARGS 63