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