Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mips / include / asm / mach-generic / ide.h

diff --git a/kernel/arch/mips/include/asm/mach-generic/ide.h b/kernel/arch/mips/include/asm/mach-generic/ide.h
new file mode 100644 (file)
index 0000000..4ae5fbc
--- /dev/null
+++ b/kernel/arch/mips/include/asm/mach-generic/ide.h
@@ -0,0 +1,138 @@
+/*
+ * 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 */