ArmPlatformPkg/ArmSmcLib: Added helper library to make SMC call to the Secure World

[mirror_edk2.git] / ArmPkg / Library / ArmLib / Common / ArmLibSupport.S

#------------------------------------------------------------------------------ \r
#\r
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
# Copyright (c) 2011, ARM Limited. All rights reserved.\r
#\r
# This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
#------------------------------------------------------------------------------\r
\r
#include <AsmMacroIoLib.h>\r
\r
#ifdef ARM_CPU_ARMv6\r
// No memory barriers for ARMv6\r
#define isb\r
#define dsb\r
#endif\r
\r
.text\r
.align 2\r
GCC_ASM_EXPORT(Cp15IdCode)\r
GCC_ASM_EXPORT(Cp15CacheInfo)\r
GCC_ASM_EXPORT(ArmGetInterruptState)\r
GCC_ASM_EXPORT(ArmGetFiqState)\r
GCC_ASM_EXPORT(ArmGetTTBR0BaseAddress)\r
GCC_ASM_EXPORT(ArmSetTTBR0)\r
GCC_ASM_EXPORT(ArmSetDomainAccessControl)\r
GCC_ASM_EXPORT(CPSRMaskInsert)\r
GCC_ASM_EXPORT(CPSRRead)\r
GCC_ASM_EXPORT(ArmWriteCPACR)\r
GCC_ASM_EXPORT(ArmWriteAuxCr)\r
GCC_ASM_EXPORT(ArmReadAuxCr)\r
GCC_ASM_EXPORT(ArmInvalidateTlb)\r
GCC_ASM_EXPORT(ArmUpdateTranslationTableEntry)\r
GCC_ASM_EXPORT(ArmWriteNsacr)\r
GCC_ASM_EXPORT(ArmWriteScr)\r
GCC_ASM_EXPORT(ArmWriteVMBar)\r
\r
#------------------------------------------------------------------------------\r
\r
ASM_PFX(Cp15IdCode):\r
  mrc     p15,0,R0,c0,c0,0\r
  bx      LR\r
\r
ASM_PFX(Cp15CacheInfo):\r
  mrc     p15,0,R0,c0,c0,1\r
  bx      LR\r
\r
ASM_PFX(ArmGetInterruptState):\r
  mrs     R0,CPSR\r
  tst     R0,#0x80      @Check if IRQ is enabled.\r
  moveq   R0,#1\r
  movne   R0,#0\r
  bx      LR\r
\r
ASM_PFX(ArmGetFiqState):\r
  mrs     R0,CPSR\r
  tst     R0,#0x40      @Check if FIQ is enabled.\r
  moveq   R0,#1\r
  movne   R0,#0\r
  bx      LR\r
\r
ASM_PFX(ArmSetDomainAccessControl):\r
  mcr     p15,0,r0,c3,c0,0\r
  bx      lr\r
\r
ASM_PFX(CPSRMaskInsert):    @ on entry, r0 is the mask and r1 is the field to insert\r
  stmfd   sp!, {r4-r12, lr} @ save all the banked registers\r
  mov     r3, sp            @ copy the stack pointer into a non-banked register\r
  mrs     r2, cpsr          @ read the cpsr\r
  bic     r2, r2, r0        @ clear mask in the cpsr\r
  and     r1, r1, r0        @ clear bits outside the mask in the input\r
  orr     r2, r2, r1        @ set field\r
  msr     cpsr_cxsf, r2     @ write back cpsr (may have caused a mode switch)\r
  isb\r
  mov     sp, r3            @ restore stack pointer\r
  ldmfd   sp!, {r4-r12, lr} @ restore registers\r
  bx      lr                @ return (hopefully thumb-safe!)             @ return (hopefully thumb-safe!)\r
\r
ASM_PFX(CPSRRead):\r
  mrs     r0, cpsr\r
  bx      lr\r
\r
ASM_PFX(ArmWriteCPACR):\r
  mcr     p15, 0, r0, c1, c0, 2\r
  bx      lr\r
\r
ASM_PFX(ArmWriteAuxCr):\r
  mcr     p15, 0, r0, c1, c0, 1\r
  bx      lr\r
\r
ASM_PFX(ArmReadAuxCr):\r
  mrc     p15, 0, r0, c1, c0, 1\r
  bx      lr  \r
\r
ASM_PFX(ArmSetTTBR0):\r
  mcr     p15,0,r0,c2,c0,0\r
  isb\r
  bx      lr\r
\r
ASM_PFX(ArmGetTTBR0BaseAddress):\r
  mrc     p15,0,r0,c2,c0,0\r
  LoadConstantToReg(0xFFFFC000, r1)\r
  and     r0, r0, r1\r
  isb\r
  bx      lr\r
\r
//\r
//VOID\r
//ArmUpdateTranslationTableEntry (\r
//  IN VOID  *TranslationTableEntry  // R0\r
//  IN VOID  *MVA                    // R1\r
//  );\r
ASM_PFX(ArmUpdateTranslationTableEntry):\r
  mcr     p15,0,R0,c7,c14,1     @ DCCIMVAC Clean data cache by MVA\r
  dsb\r
  mcr     p15,0,R1,c8,c7,1      @ TLBIMVA TLB Invalidate MVA  \r
  mcr     p15,0,R9,c7,c5,6      @ BPIALL Invalidate Branch predictor array. R9 == NoOp\r
  dsb\r
  isb\r
  bx      lr\r
\r
ASM_PFX(ArmInvalidateTlb):\r
  mov     r0,#0\r
  mcr     p15,0,r0,c8,c7,0\r
  mcr     p15,0,R9,c7,c5,6      @ BPIALL Invalidate Branch predictor array. R9 == NoOp\r
  dsb\r
  isb\r
  bx      lr\r
\r
ASM_PFX(ArmWriteNsacr):\r
  mcr     p15, 0, r0, c1, c1, 2\r
  bx      lr\r
\r
ASM_PFX(ArmWriteScr):\r
  mcr     p15, 0, r0, c1, c1, 0\r
  bx      lr\r
\r
ASM_PFX(ArmWriteVMBar):\r
  mcr     p15, 0, r0, c12, c0, 1\r
  bx      lr\r
\r
ASM_FUNCTION_REMOVE_IF_UNREFERENCED\r