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/** @file
Macros to work around lack of Apple support for LDR register, =expr
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __MACRO_IO_LIB_H__
#define __MACRO_IO_LIB_H__
#if defined(__APPLE__)
//
// ldr reg, =expr does not work with current Apple tool chain. So do the work our selves
//
// returns _Data in R0 and _Address in R1
#define MmioWrite32(_Address, _Data) \
ldr r1, [pc, #8] ; \
ldr r0, [pc, #8] ; \
str r0, [r1] ; \
b 1f ; \
.long (_Address) ; \
.long (_Data) ; \
1:
// returns _Data in R0 and _Address in R1, and _OrData in r2
#define MmioOr32(_Address, _OrData) \
ldr r1, [pc, #16] ; \
ldr r2, [pc, #16] ; \
ldr r0, [r1] ; \
orr r0, r0, r2 ; \
str r0, [r1] ; \
b 1f ; \
.long (_Address) ; \
.long (_OrData) ; \
1:
// returns _Data in R0 and _Address in R1, and _OrData in r2
#define MmioAnd32(_Address, _AndData) \
ldr r1, [pc, #16] ; \
ldr r2, [pc, #16] ; \
ldr r0, [r1] ; \
and r0, r0, r2 ; \
str r0, [r1] ; \
b 1f ; \
.long (_Address) ; \
.long (_AndData) ; \
1:
// returns result in R0, _Address in R1, and _OrData in r2
#define MmioAndThenOr32(_Address, _AndData, _OrData) \
ldr r1, [pc, #24] ; \
ldr r0, [r1] ; \
ldr r2, [pc, #20] ; \
and r0, r0, r2 ; \
ldr r2, [pc, #16] ; \
orr r0, r0, r2 ; \
str r0, [r1] ; \
b 1f ; \
.long (_Address) ; \
.long (_AndData) ; \
.long (_OrData) ; \
1:
// returns _Data in _Reg and _Address in R1
#define MmioWriteFromReg32(_Address, _Reg) \
ldr r1, [pc, #4] ; \
str _Reg, [r1] ; \
b 1f ; \
.long (_Address) ; \
1:
// returns _Data in R0 and _Address in R1
#define MmioRead32(_Address) \
ldr r1, [pc, #4] ; \
ldr r0, [r1] ; \
b 1f ; \
.long (_Address) ; \
1:
// returns _Data in Reg and _Address in R1
#define MmioReadToReg32(_Address, _Reg) \
ldr r1, [pc, #4] ; \
ldr _Reg, [r1] ; \
b 1f ; \
.long (_Address) ; \
1:
// load R0 with _Data
#define LoadConstant(_Data) \
ldr r0, [pc, #0] ; \
b 1f ; \
.long (_Data) ; \
1:
// load _Reg with _Data
#define LoadConstantToReg(_Data, _Reg) \
ldr _Reg, [pc, #0] ; \
b 1f ; \
.long (_Data) ; \
1:
// load _Reg with _Data if eq
#define LoadConstantToRegIfEq(_Data, _Reg) \
ldreq _Reg, [pc, #0] ; \
b 1f ; \
.long (_Data) ; \
1:
// Reserve a region at the top of the Primary Core stack
// for Global variables for the XIP phase
#define SetPrimaryStack(StackTop, GlobalSize, Tmp) \
and Tmp, GlobalSize, #7 ; \
rsbne Tmp, Tmp, #8 ; \
add GlobalSize, GlobalSize, Tmp ; \
sub sp, StackTop, GlobalSize ; \
; \
mov Tmp, sp ; \
mov GlobalSize, #0x0 ; \
_SetPrimaryStackInitGlobals: ; \
cmp Tmp, StackTop ; \
beq _SetPrimaryStackEnd ; \
str GlobalSize, [Tmp], #4 ; \
b _SetPrimaryStackInitGlobals ; \
_SetPrimaryStackEnd:
// Initialize the Global Variable with '0'
#define InitializePrimaryStack(GlobalSize, Tmp1) \
and Tmp1, GlobalSize, #7 ; \
rsbne Tmp1, Tmp1, #8 ; \
add GlobalSize, GlobalSize, Tmp1 ; \
; \
mov Tmp1, sp ; \
sub sp, GlobalSize ; \
mov GlobalSize, #0x0 ; \
_InitializePrimaryStackLoop: ; \
cmp Tmp1, sp ; \
bls _InitializePrimaryStackEnd ; \
str GlobalSize, [Tmp1, #-4]! ; \
b _InitializePrimaryStackLoop ; \
_InitializePrimaryStackEnd:
#elif defined (__GNUC__)
#define MmioWrite32(Address, Data) \
ldr r1, =Address ; \
ldr r0, =Data ; \
str r0, [r1]
#define MmioOr32(Address, OrData) \
ldr r1, =Address ; \
ldr r2, =OrData ; \
ldr r0, [r1] ; \
orr r0, r0, r2 ; \
str r0, [r1]
#define MmioAnd32(Address, AndData) \
ldr r1, =Address ; \
ldr r2, =AndData ; \
ldr r0, [r1] ; \
and r0, r0, r2 ; \
str r0, [r1]
#define MmioAndThenOr32(Address, AndData, OrData) \
ldr r1, =Address ; \
ldr r0, [r1] ; \
ldr r2, =AndData ; \
and r0, r0, r2 ; \
ldr r2, =OrData ; \
orr r0, r0, r2 ; \
str r0, [r1]
#define MmioWriteFromReg32(Address, Reg) \
ldr r1, =Address ; \
str Reg, [r1]
#define MmioRead32(Address) \
ldr r1, =Address ; \
ldr r0, [r1]
#define MmioReadToReg32(Address, Reg) \
ldr r1, =Address ; \
ldr Reg, [r1]
#define LoadConstant(Data) \
ldr r0, =Data
#define LoadConstantToReg(Data, Reg) \
ldr Reg, =Data
#else
//
// Use ARM assembly macros, form armasam
//
// Less magic in the macros if ldr reg, =expr works
//
// returns _Data in R0 and _Address in R1
#define MmioWrite32(Address, Data) MmioWrite32Macro Address, Data
// returns Data in R0 and Address in R1, and OrData in r2
#define MmioOr32(Address, OrData) MmioOr32Macro Address, OrData
// returns _Data in R0 and _Address in R1, and _OrData in r2
#define MmioAnd32(Address, AndData) MmioAnd32Macro Address, AndData
// returns result in R0, _Address in R1, and _OrData in r2
#define MmioAndThenOr32(Address, AndData, OrData) MmioAndThenOr32Macro Address, AndData, OrData
// returns _Data in _Reg and _Address in R1
#define MmioWriteFromReg32(Address, Reg) MmioWriteFromReg32Macro Address, Reg
// returns _Data in R0 and _Address in R1
#define MmioRead32(Address) MmioRead32Macro Address
// returns _Data in Reg and _Address in R1
#define MmioReadToReg32(Address, Reg) MmioReadToReg32Macro Address, Reg
// load R0 with _Data
#define LoadConstant(Data) LoadConstantMacro Data
// load _Reg with _Data
#define LoadConstantToReg(Data, Reg) LoadConstantToRegMacro Data, Reg
// conditional load testing eq flag
#define LoadConstantToRegIfEq(Data, Reg) LoadConstantToRegIfEqMacro Data, Reg
#endif
#endif
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