2 * I/O string operations
3 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
4 * Copyright (C) 2006 IBM Corporation
6 * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
9 * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
10 * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
12 * Rewritten in C by Stephen Rothwell.
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/compiler.h>
22 #include <linux/module.h>
25 #include <asm/firmware.h>
28 void _insb(volatile u8 __iomem *port, void *buf, long count)
33 BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
35 if (unlikely(count <= 0))
40 asm volatile("eieio");
42 } while (--count != 0);
43 asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
47 void _outsb(volatile u8 __iomem *port, const void *buf, long count)
51 BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
53 if (unlikely(count <= 0))
58 } while (--count != 0);
61 EXPORT_SYMBOL(_outsb);
63 void _insw_ns(volatile u16 __iomem *port, void *buf, long count)
68 BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
70 if (unlikely(count <= 0))
75 asm volatile("eieio");
77 } while (--count != 0);
78 asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
80 EXPORT_SYMBOL(_insw_ns);
82 void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
84 const u16 *tbuf = buf;
86 BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
88 if (unlikely(count <= 0))
93 } while (--count != 0);
96 EXPORT_SYMBOL(_outsw_ns);
98 void _insl_ns(volatile u32 __iomem *port, void *buf, long count)
103 BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
105 if (unlikely(count <= 0))
107 asm volatile("sync");
110 asm volatile("eieio");
112 } while (--count != 0);
113 asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
115 EXPORT_SYMBOL(_insl_ns);
117 void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
119 const u32 *tbuf = buf;
121 BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
123 if (unlikely(count <= 0))
125 asm volatile("sync");
128 } while (--count != 0);
129 asm volatile("sync");
131 EXPORT_SYMBOL(_outsl_ns);