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138 lines
3.8 KiB
138 lines
3.8 KiB
/* |
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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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