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https://github.com/edk2-porting/linux-next.git
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caf81329c3
This patch changes the io operations so that they are out of line if CONFIG_PPC_ISERIES is set and includes a firmware feature check in that case. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/*
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* I/O string operations
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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* Copyright (C) 2006 IBM Corporation
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*
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* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
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* and Paul Mackerras.
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*
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* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
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* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
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*
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* Rewritten in C by Stephen Rothwell.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <linux/module.h>
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#include <asm/io.h>
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#include <asm/firmware.h>
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#include <asm/bug.h>
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void _insb(volatile u8 __iomem *port, void *buf, long count)
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{
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u8 *tbuf = buf;
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u8 tmp;
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BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
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if (unlikely(count <= 0))
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return;
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asm volatile("sync");
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do {
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tmp = *port;
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asm volatile("eieio");
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*tbuf++ = tmp;
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} while (--count != 0);
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asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
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}
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EXPORT_SYMBOL(_insb);
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void _outsb(volatile u8 __iomem *port, const void *buf, long count)
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{
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const u8 *tbuf = buf;
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BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
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if (unlikely(count <= 0))
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return;
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asm volatile("sync");
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do {
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*port = *tbuf++;
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} while (--count != 0);
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asm volatile("sync");
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}
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EXPORT_SYMBOL(_outsb);
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void _insw_ns(volatile u16 __iomem *port, void *buf, long count)
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{
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u16 *tbuf = buf;
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u16 tmp;
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BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
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if (unlikely(count <= 0))
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return;
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asm volatile("sync");
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do {
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tmp = *port;
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asm volatile("eieio");
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*tbuf++ = tmp;
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} while (--count != 0);
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asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
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}
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EXPORT_SYMBOL(_insw_ns);
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void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
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{
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const u16 *tbuf = buf;
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BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
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if (unlikely(count <= 0))
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return;
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asm volatile("sync");
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do {
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*port = *tbuf++;
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} while (--count != 0);
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asm volatile("sync");
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}
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EXPORT_SYMBOL(_outsw_ns);
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void _insl_ns(volatile u32 __iomem *port, void *buf, long count)
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{
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u32 *tbuf = buf;
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u32 tmp;
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BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
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if (unlikely(count <= 0))
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return;
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asm volatile("sync");
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do {
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tmp = *port;
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asm volatile("eieio");
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*tbuf++ = tmp;
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} while (--count != 0);
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asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
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}
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EXPORT_SYMBOL(_insl_ns);
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void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
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{
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const u32 *tbuf = buf;
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BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
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if (unlikely(count <= 0))
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return;
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asm volatile("sync");
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do {
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*port = *tbuf++;
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} while (--count != 0);
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asm volatile("sync");
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}
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EXPORT_SYMBOL(_outsl_ns);
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