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/***************************************************************************
* Copyright (C) 2004, 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef TYPES_H
#define TYPES_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef u8
typedef unsigned char u8;
#endif
#ifndef u16
typedef unsigned short u16;
#endif
#ifndef u32
typedef unsigned int u32;
#endif
#ifndef u64
typedef unsigned long long u64;
#endif
typedef struct jtag_tap_s jtag_tap_t;
/* DANGER!!!! here be dragons!
*
* Leave these fn's as byte accesses because it is safe
* across architectures. Clever usage of 32 bit access
* will create problems on some hosts.
*
* Note that the "buf" pointer in memory is probably unaligned.
*
* Were these functions to be re-written to take a 32 bit wide or 16 bit wide
* memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
* ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
* will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
* memory access works as if aligned. So what follows below will work for all
* platforms and gives the compiler leeway to do its own platform specific optimizations.
*
* Again, note that the "buf" pointer in memory is probably unaligned.
*/
static inline u32 le_to_h_u32(const u8* buf)
{
return (u32)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
}
static inline u16 le_to_h_u16(const u8* buf)
{
return (u16)(buf[0] | buf[1] << 8);
}
static inline u32 be_to_h_u32(const u8* buf)
{
return (u32)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
}
static inline u16 be_to_h_u16(const u8* buf)
{
return (u16)(buf[1] | buf[0] << 8);
}
static inline void h_u32_to_le(u8* buf, int val)
{
buf[3] = (u8) (val >> 24);
buf[2] = (u8) (val >> 16);
buf[1] = (u8) (val >> 8);
buf[0] = (u8) (val >> 0);
}
static inline void h_u32_to_be(u8* buf, int val)
{
buf[0] = (u8) (val >> 24);
buf[1] = (u8) (val >> 16);
buf[2] = (u8) (val >> 8);
buf[3] = (u8) (val >> 0);
}
static inline void h_u16_to_le(u8* buf, int val)
{
buf[1] = (u8) (val >> 8);
buf[0] = (u8) (val >> 0);
}
static inline void h_u16_to_be(u8* buf, int val)
{
buf[0] = (u8) (val >> 8);
buf[1] = (u8) (val >> 0);
}
#endif /* TYPES_H */
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