1/* 2 * Copyright (c) 2015, Linaro Limited 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <tee_syscall_numbers.h> 30#include <asm.S> 31 32 .section .text 33 .balign 4 34 .code 32 35 36 .macro UTEE_SYSCALL name, scn, num_args 37 FUNC \name , : 38 39 push {r5-r7,lr} 40 mov r7, #(\scn) 41 .if \num_args > TEE_SVC_MAX_ARGS 42 .error "Too many arguments for syscall" 43 .endif 44 .if \num_args <= 4 45 @ No arguments passed on stack 46 mov r6, #0 47 .else 48 @ Tell number of arguments passed on the stack 49 mov r6, #(\num_args - 4) 50 @ Point just before the push (4 registers) above on the first argument 51 add r5, sp, #(4 * 4) 52 .endif 53 svc #0 54 pop {r5-r7,pc} 55 END_FUNC \name 56 .endm 57 58#include "utee_syscalls_asm.S" 59