1 // 2 // Copyright (c) 2012-2014, ARM Limited. All rights reserved. 3 // Copyright (c) 2014-2016, Linaro Limited. All rights reserved. 4 // 5 // This program and the accompanying materials 6 // are licensed and made available under the terms and conditions of the BSD License 7 // which accompanies this distribution. The full text of the license may be found at 8 // http://opensource.org/licenses/bsd-license.php 9 // 10 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 // 13 // 14 15 #include <AsmMacroIoLibV8.h> 16 17 ASM_FUNC(ArmCallHvc) 18 // Push x0 on the stack - The stack must always be quad-word aligned 19 str x0, [sp, #-16]! 20 21 // Load the HVC arguments values into the appropriate registers 22 ldp x6, x7, [x0, #48] 23 ldp x4, x5, [x0, #32] 24 ldp x2, x3, [x0, #16] 25 ldp x0, x1, [x0, #0] 26 27 hvc #0 28 29 // Pop the ARM_HVC_ARGS structure address from the stack into x9 30 ldr x9, [sp], #16 31 32 // Store the HVC returned values into the ARM_HVC_ARGS structure. 33 // A HVC call can return up to 4 values 34 stp x2, x3, [x9, #16] 35 stp x0, x1, [x9, #0] 36 37 mov x0, x9 38 39 ret 40
