139 строки
3.8 KiB
C
139 строки
3.8 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994-1996 Linus Torvalds & authors
|
|
*
|
|
* Copied from i386; many of the especially older MIPS or ISA-based platforms
|
|
* are basically identical. Using this file probably implies i8259 PIC
|
|
* support in a system but the very least interrupt numbers 0 - 15 need to
|
|
* be put aside for legacy devices.
|
|
*/
|
|
#ifndef __ASM_MACH_GENERIC_IDE_H
|
|
#define __ASM_MACH_GENERIC_IDE_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/stddef.h>
|
|
#include <asm/processor.h>
|
|
|
|
/* MIPS port and memory-mapped I/O string operations. */
|
|
static inline void __ide_flush_prologue(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
|
|
preempt_disable();
|
|
#endif
|
|
}
|
|
|
|
static inline void __ide_flush_epilogue(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
|
|
preempt_enable();
|
|
#endif
|
|
}
|
|
|
|
static inline void __ide_flush_dcache_range(unsigned long addr, unsigned long size)
|
|
{
|
|
if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc) {
|
|
unsigned long end = addr + size;
|
|
|
|
while (addr < end) {
|
|
local_flush_data_cache_page((void *)addr);
|
|
addr += PAGE_SIZE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* insw() and gang might be called with interrupts disabled, so we can't
|
|
* send IPIs for flushing due to the potencial of deadlocks, see the comment
|
|
* above smp_call_function() in arch/mips/kernel/smp.c. We work around the
|
|
* problem by disabling preemption so we know we actually perform the flush
|
|
* on the processor that actually has the lines to be flushed which hopefully
|
|
* is even better for performance anyway.
|
|
*/
|
|
static inline void __ide_insw(unsigned long port, void *addr,
|
|
unsigned int count)
|
|
{
|
|
__ide_flush_prologue();
|
|
insw(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 2);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_insl(unsigned long port, void *addr, unsigned int count)
|
|
{
|
|
__ide_flush_prologue();
|
|
insl(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 4);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_outsw(unsigned long port, const void *addr,
|
|
unsigned long count)
|
|
{
|
|
__ide_flush_prologue();
|
|
outsw(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 2);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_outsl(unsigned long port, const void *addr,
|
|
unsigned long count)
|
|
{
|
|
__ide_flush_prologue();
|
|
outsl(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 4);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_mm_insw(void __iomem *port, void *addr, u32 count)
|
|
{
|
|
__ide_flush_prologue();
|
|
readsw(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 2);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_mm_insl(void __iomem *port, void *addr, u32 count)
|
|
{
|
|
__ide_flush_prologue();
|
|
readsl(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 4);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_mm_outsw(void __iomem *port, void *addr, u32 count)
|
|
{
|
|
__ide_flush_prologue();
|
|
writesw(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 2);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
static inline void __ide_mm_outsl(void __iomem * port, void *addr, u32 count)
|
|
{
|
|
__ide_flush_prologue();
|
|
writesl(port, addr, count);
|
|
__ide_flush_dcache_range((unsigned long)addr, count * 4);
|
|
__ide_flush_epilogue();
|
|
}
|
|
|
|
/* ide_insw calls insw, not __ide_insw. Why? */
|
|
#undef insw
|
|
#undef insl
|
|
#undef outsw
|
|
#undef outsl
|
|
#define insw(port, addr, count) __ide_insw(port, addr, count)
|
|
#define insl(port, addr, count) __ide_insl(port, addr, count)
|
|
#define outsw(port, addr, count) __ide_outsw(port, addr, count)
|
|
#define outsl(port, addr, count) __ide_outsl(port, addr, count)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ASM_MACH_GENERIC_IDE_H */
|