1 /* 2 * Copyright (c) 2020 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _ARM64_SMCCC_ASM_H_ 30 #define _ARM64_SMCCC_ASM_H_ 31 32 #ifndef __ASSEMBLER__ 33 #error "This header should only be used in .s files" 34 #endif 35 36 /* 37 * SAVE_SMCCC_CLOBBERED_REGISTERS 38 * 39 * Saves x0-x3 to stack in preparation for an hvc/smc call. 40 */ 41 42 .macro SAVE_SMCCC_CLOBBERED_REGISTERS 43 stp x0, x1, [sp, #- 16]! 44 stp x2, x3, [sp, #- 16]! 45 .endmacro 46 47 /* 48 * LOAD_SMCCC_CLOBBERED_REGISTERS 49 * 50 * Loads x0-x3 from stack after an hvc/smc call. 51 */ 52 53 .macro LOAD_SMCCC_CLOBBERED_REGISTERS 54 ldp x2, x3, [sp], #16 55 ldp x0, x1, [sp], #16 56 .endmacro 57 58 #endif /* _ARM64_SMCCC_ASM_H_ */ 59 60 /* vim: set ts=4 ft=asm: */ 61