1 // 2 // Copyright (c) 2012-2014, ARM Limited. All rights reserved. 3 // 4 // This program and the accompanying materials 5 // are licensed and made available under the terms and conditions of the BSD License 6 // which accompanies this distribution. The full text of the license may be found at 7 // http://opensource.org/licenses/bsd-license.php 8 // 9 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 // 12 // 13 14 .text 15 .align 3 16 17 GCC_ASM_EXPORT(ArmCallSmc) 18 19 ASM_PFX(ArmCallSmc): 20 // Push x0 on the stack - The stack must always be quad-word aligned 21 str x0, [sp, #-16]! 22 23 // Load the SMC arguments values into the appropriate registers 24 ldp x6, x7, [x0, #48] 25 ldp x4, x5, [x0, #32] 26 ldp x2, x3, [x0, #16] 27 ldp x0, x1, [x0, #0] 28 29 smc #0 30 31 // Pop the ARM_SMC_ARGS structure address from the stack into x9 32 ldr x9, [sp], #16 33 34 // Store the SMC returned values into the ARM_SMC_ARGS structure. 35 // A SMC call can return up to 4 values - we do not need to store back x4-x7. 36 stp x2, x3, [x9, #16] 37 stp x0, x1, [x9, #0] 38 39 mov x0, x9 40 41 ret 42
