1 // 2 // Copyright (c) 2012-2014, ARM Limited. All rights reserved. 3 // Copyright (c) 2014, 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 16 INCLUDE AsmMacroExport.inc 17 18 RVCT_ASM_EXPORT ArmCallHvc 19 push {r4-r8} 20 // r0 will be popped just after the HVC call 21 push {r0} 22 23 // Load the HVC arguments values into the appropriate registers 24 ldr r7, [r0, #28] 25 ldr r6, [r0, #24] 26 ldr r5, [r0, #20] 27 ldr r4, [r0, #16] 28 ldr r3, [r0, #12] 29 ldr r2, [r0, #8] 30 ldr r1, [r0, #4] 31 ldr r0, [r0, #0] 32 33 hvc #0 34 35 // Pop the ARM_HVC_ARGS structure address from the stack into r8 36 pop {r8} 37 38 // Load the HVC returned values into the appropriate registers 39 // A HVC call can return up to 4 values - we do not need to store back r4-r7. 40 str r3, [r8, #12] 41 str r2, [r8, #8] 42 str r1, [r8, #4] 43 str r0, [r8, #0] 44 45 mov r0, r8 46 47 // Restore the registers r4-r8 48 pop {r4-r8} 49 50 bx lr 51 52 END 53
