1 /***************************************************************************
2 * Copyright (C) 2004, 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
31 typedef unsigned char u8;
35 typedef unsigned short u16;
39 typedef unsigned int u32;
43 typedef unsigned long long u64;
46 typedef struct jtag_tap_s jtag_tap_t;
49 /* DANGER!!!! here be dragons!
51 * Leave these fn's as byte accesses because it is safe
52 * across architectures. Clever usage of 32 bit access
53 * will create problems on some hosts.
55 * Note that the "buf" pointer in memory is probably unaligned.
57 * Were these functions to be re-written to take a 32 bit wide or 16 bit wide
58 * memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
59 * ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
60 * will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
61 * memory access works as if aligned. So what follows below will work for all
62 * platforms and gives the compiler leeway to do its own platform specific optimizations.
64 * Again, note that the "buf" pointer in memory is probably unaligned.
68 static inline u32 le_to_h_u32(const u8* buf)
70 return (u32)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
73 static inline u16 le_to_h_u16(const u8* buf)
75 return (u16)(buf[0] | buf[1] << 8);
78 static inline u32 be_to_h_u32(const u8* buf)
80 return (u32)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
83 static inline u16 be_to_h_u16(const u8* buf)
85 return (u16)(buf[1] | buf[0] << 8);
88 static inline void h_u32_to_le(u8* buf, int val)
90 buf[3] = (u8) (val >> 24);
91 buf[2] = (u8) (val >> 16);
92 buf[1] = (u8) (val >> 8);
93 buf[0] = (u8) (val >> 0);
96 static inline void h_u32_to_be(u8* buf, int val)
98 buf[0] = (u8) (val >> 24);
99 buf[1] = (u8) (val >> 16);
100 buf[2] = (u8) (val >> 8);
101 buf[3] = (u8) (val >> 0);
104 static inline void h_u16_to_le(u8* buf, int val)
106 buf[1] = (u8) (val >> 8);
107 buf[0] = (u8) (val >> 0);
110 static inline void h_u16_to_be(u8* buf, int val)
112 buf[0] = (u8) (val >> 8);
113 buf[1] = (u8) (val >> 0);