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