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 #include <AsmMacroIoLibV8.h> 15 16 ASM_FUNC(ArmCallSmc) 17 // Push x0 on the stack - The stack must always be quad-word aligned 18 str x0, [sp, #-16]! 19 20 // Load the SMC arguments values into the appropriate registers 21 ldp x6, x7, [x0, #48] 22 ldp x4, x5, [x0, #32] 23 ldp x2, x3, [x0, #16] 24 ldp x0, x1, [x0, #0] 25 26 smc #0 27 28 // Pop the ARM_SMC_ARGS structure address from the stack into x9 29 ldr x9, [sp], #16 30 31 // Store the SMC returned values into the ARM_SMC_ARGS structure. 32 // A SMC call can return up to 4 values - we do not need to store back x4-x7. 33 stp x2, x3, [x9, #16] 34 stp x0, x1, [x9, #0] 35 36 mov x0, x9 37 38 ret 39
