/* $Id: stack.hh,v 1.8 2008-04-28 20:29:15 sybreon Exp $
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/* $Id: stack.hh,v 1.8 2008-04-28 20:29:15 sybreon Exp $
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**
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**
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** AEMB2 HI-PERFORMANCE CPU
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** AEMB2 HI-PERFORMANCE CPU
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** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap
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** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap
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**
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**
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** This file is part of AEMB.
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** This file is part of AEMB.
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**
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**
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** AEMB is free software: you can redistribute it and/or modify it
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** AEMB is free software: you can redistribute it and/or modify it
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** under the terms of the GNU General Public License as published by
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** under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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** (at your option) any later version.
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**
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**
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** AEMB is distributed in the hope that it will be useful, but WITHOUT
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** AEMB is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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** License for more details.
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** License for more details.
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**
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**
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** You should have received a copy of the GNU General Public License
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** You should have received a copy of the GNU General Public License
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** along with AEMB. If not, see .
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** along with AEMB. If not, see .
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*/
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*/
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/**
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/**
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Basic stack related functions
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Basic stack related functions
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@file stack.hh
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@file stack.hh
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*/
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*/
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#ifndef _AEMB_STACK_HH
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#ifndef _AEMB_STACK_HH
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#define _AEMB_STACK_HH
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#define _AEMB_STACK_HH
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#ifdef __cplusplus
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#ifdef __cplusplus
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extern "C" {
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extern "C" {
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#endif
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#endif
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/**
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/**
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Reads the size of the memory space allocated for the stack in bytes.
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Reads the size of the memory space allocated for the stack in bytes.
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@return size of stack
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@return size of stack
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*/
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*/
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inline int aembGetStackSize()
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static inline int aembGetStackSize()
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{
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{
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int tmp;
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int tmp;
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asm ("la %0, r0, _STACK_SIZE":"=r"(tmp));
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asm ("la %0, r0, _STACK_SIZE":"=r"(tmp));
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return tmp;
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return tmp;
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}
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}
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/**
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/**
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Reads the end of the memory space allocated for the stack. This is
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Reads the end of the memory space allocated for the stack. This is
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where the stack ends.
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where the stack ends.
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@return end of stack
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@return end of stack
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*/
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*/
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inline int aembGetStackEnd()
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static inline int aembGetStackEnd()
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{
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{
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int tmp;
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int tmp;
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asm ("la %0, r0, _stack_end":"=r"(tmp));
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asm ("la %0, r0, _stack_end":"=r"(tmp));
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return tmp;
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return tmp;
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}
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}
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/**
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/**
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Reads the top of the memory space allocated for the stack. This is
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Reads the top of the memory space allocated for the stack. This is
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where the stack starts.
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where the stack starts.
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@return top of stack
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@return top of stack
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*/
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*/
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inline int aembGetStackTop()
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static inline int aembGetStackTop()
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{
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{
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int tmp;
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int tmp;
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asm ("la %0, r0, _stack":"=r"(tmp));
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asm ("la %0, r0, _stack":"=r"(tmp));
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return tmp;
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return tmp;
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}
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}
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/**
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/**
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Reads register R1 which is the designated stack pointer.
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Reads register R1 which is the designated stack pointer.
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@return stack pointer
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@return stack pointer
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*/
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*/
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inline int aembGetStack()
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static inline int aembGetStack()
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{
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{
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int tmp;
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int tmp;
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asm ("addk %0, r0, r1":"=r"(tmp));
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asm ("addk %0, r0, r1":"=r"(tmp));
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return tmp;
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return tmp;
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}
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}
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/**
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/**
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Sets register R1 to the new stack pointer.
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Sets register R1 to the new stack pointer.
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@param stk new stack pointer
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@param stk new stack pointer
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@return new stack pointer
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@return new stack pointer
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*/
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*/
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inline int aembSetStack(int stk)
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static inline int aembSetStack(int stk)
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{
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{
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asm ("addk r1, r0, %0"::"r"(stk));
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asm ("addk r1, r0, %0"::"r"(stk));
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return stk;
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return stk;
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}
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}
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/**
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/**
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Duplicates the stack
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Duplicates the stack
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@param newp new stack pointer
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@param newp new stack pointer
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@param oldp old stack pointer
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@param oldp old stack pointer
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@param endp end of the stack
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@param endp end of the stack
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*/
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*/
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inline void aembDupStack(unsigned int *newp, unsigned int *oldp, unsigned int *endp)
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static inline void aembDupStack(unsigned int *newp, unsigned int *oldp, unsigned int *endp)
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{
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{
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while (oldp < endp)
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while (oldp < endp)
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{
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{
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// copy the stack content
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// copy the stack content
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*newp = *oldp;
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*newp = *oldp;
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// this increments 1 word (not 1 byte)
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// this increments 1 word (not 1 byte)
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newp++;
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newp++;
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oldp++;
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oldp++;
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}
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}
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}
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}
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#ifdef __cplusplus
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#ifdef __cplusplus
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}
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}
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#endif
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#endif
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#endif
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#endif
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/*
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/*
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$Log: not supported by cvs2svn $
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$Log: not supported by cvs2svn $
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Revision 1.7 2008/04/27 16:33:42 sybreon
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Revision 1.7 2008/04/27 16:33:42 sybreon
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License change to GPL3.
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License change to GPL3.
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Revision 1.6 2008/04/27 16:04:42 sybreon
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Revision 1.6 2008/04/27 16:04:42 sybreon
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Minor cosmetic changes.
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Minor cosmetic changes.
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Revision 1.5 2008/04/26 19:31:35 sybreon
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Revision 1.5 2008/04/26 19:31:35 sybreon
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Made headers C compatible.
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Made headers C compatible.
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Revision 1.4 2008/04/26 18:04:31 sybreon
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Revision 1.4 2008/04/26 18:04:31 sybreon
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Updated software to freeze T0 and run T1.
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Updated software to freeze T0 and run T1.
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Revision 1.3 2008/04/23 14:19:39 sybreon
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Revision 1.3 2008/04/23 14:19:39 sybreon
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Fixed minor bugs.
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Fixed minor bugs.
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Initial use of hardware mutex.
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Initial use of hardware mutex.
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Revision 1.2 2008/04/20 16:35:53 sybreon
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Revision 1.2 2008/04/20 16:35:53 sybreon
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Added C/C++ compatible #ifdef statements
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Added C/C++ compatible #ifdef statements
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Revision 1.1 2008/04/09 19:48:37 sybreon
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Revision 1.1 2008/04/09 19:48:37 sybreon
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Added new C++ files
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Added new C++ files
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*/
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*/
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