sh: machvec IO death.

This takes a bit of a sledgehammer to the machvec I/O routines. The
iomem case requires no special casing and so can just be dropped
outright. This only leaves the ioport casing for PCI and SuperIO
mangling. With the SuperIO case going through the standard ioport
mapping, it's possible to replace everything with generic routines.

With this done the standard I/O routines are tidied up and NO_IOPORT
now gets default-enabled for the vast majority of boards.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 180 insertions, 165 deletions

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index b237d525d592..89ab2c57a4c2 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -1,5 +1,6 @@
 #ifndef __ASM_SH_IO_H
 #define __ASM_SH_IO_H
+
 /*
  * Convention:
  *    read{b,w,l,q}/write{b,w,l,q} are for PCI,
@@ -15,12 +16,6 @@
  * SuperH specific I/O (raw I/O to on-chip CPU peripherals). In practice
  * these have the same semantics as the __raw variants, and as such, all
  * new code should be using the __raw versions.
- *
- * All ISA I/O routines are wrapped through the machine vector. If a
- * board does not provide overrides, a generic set that are copied in
- * from the default machine vector are used instead. These are largely
- * for old compat code for I/O offseting to SuperIOs, all of which are
- * better handled through the machvec ioport mapping routines these days.
  */
 #include <linux/errno.h>
 #include <asm/cache.h>
@@ -31,39 +26,10 @@
 #include <asm-generic/iomap.h>
 
 #ifdef __KERNEL__
-/*
- * Depending on which platform we are running on, we need different
- * I/O functions.
- */
-#define __IO_PREFIX	generic
+#define __IO_PREFIX     generic
 #include <asm/io_generic.h>
 #include <asm/io_trapped.h>
 
-#ifdef CONFIG_HAS_IOPORT
-
-#define inb(p)			sh_mv.mv_inb((p))
-#define inw(p)			sh_mv.mv_inw((p))
-#define inl(p)			sh_mv.mv_inl((p))
-#define outb(x,p)		sh_mv.mv_outb((x),(p))
-#define outw(x,p)		sh_mv.mv_outw((x),(p))
-#define outl(x,p)		sh_mv.mv_outl((x),(p))
-
-#define inb_p(p)		sh_mv.mv_inb_p((p))
-#define inw_p(p)		sh_mv.mv_inw_p((p))
-#define inl_p(p)		sh_mv.mv_inl_p((p))
-#define outb_p(x,p)		sh_mv.mv_outb_p((x),(p))
-#define outw_p(x,p)		sh_mv.mv_outw_p((x),(p))
-#define outl_p(x,p)		sh_mv.mv_outl_p((x),(p))
-
-#define insb(p,b,c)		sh_mv.mv_insb((p), (b), (c))
-#define insw(p,b,c)		sh_mv.mv_insw((p), (b), (c))
-#define insl(p,b,c)		sh_mv.mv_insl((p), (b), (c))
-#define outsb(p,b,c)		sh_mv.mv_outsb((p), (b), (c))
-#define outsw(p,b,c)		sh_mv.mv_outsw((p), (b), (c))
-#define outsl(p,b,c)		sh_mv.mv_outsl((p), (b), (c))
-
-#endif
-
 #define __raw_writeb(v,a)	(__chk_io_ptr(a), *(volatile u8  __force *)(a) = (v))
 #define __raw_writew(v,a)	(__chk_io_ptr(a), *(volatile u16 __force *)(a) = (v))
 #define __raw_writel(v,a)	(__chk_io_ptr(a), *(volatile u32 __force *)(a) = (v))
@@ -74,68 +40,39 @@
 #define __raw_readl(a)		(__chk_io_ptr(a), *(volatile u32 __force *)(a))
 #define __raw_readq(a)		(__chk_io_ptr(a), *(volatile u64 __force *)(a))
 
-#define readb(a)		({ u8  r_ = __raw_readb(a); mb(); r_; })
-#define readw(a)		({ u16 r_ = __raw_readw(a); mb(); r_; })
-#define readl(a)		({ u32 r_ = __raw_readl(a); mb(); r_; })
-#define readq(a)		({ u64 r_ = __raw_readq(a); mb(); r_; })
-
-#define writeb(v,a)		({ __raw_writeb((v),(a)); mb(); })
-#define writew(v,a)		({ __raw_writew((v),(a)); mb(); })
-#define writel(v,a)		({ __raw_writel((v),(a)); mb(); })
-#define writeq(v,a)		({ __raw_writeq((v),(a)); mb(); })
-
-/*
- * Legacy SuperH on-chip I/O functions
- *
- * These are all deprecated, all new (and especially cross-platform) code
- * should be using the __raw_xxx() routines directly.
- */
-static inline u8 __deprecated ctrl_inb(unsigned long addr)
-{
-	return __raw_readb(addr);
-}
-
-static inline u16 __deprecated ctrl_inw(unsigned long addr)
-{
-	return __raw_readw(addr);
-}
-
-static inline u32 __deprecated ctrl_inl(unsigned long addr)
-{
-	return __raw_readl(addr);
-}
-
-static inline u64 __deprecated ctrl_inq(unsigned long addr)
-{
-	return __raw_readq(addr);
-}
-
-static inline void __deprecated ctrl_outb(u8 v, unsigned long addr)
-{
-	__raw_writeb(v, addr);
-}
-
-static inline void __deprecated ctrl_outw(u16 v, unsigned long addr)
-{
-	__raw_writew(v, addr);
-}
-
-static inline void __deprecated ctrl_outl(u32 v, unsigned long addr)
-{
-	__raw_writel(v, addr);
-}
-
-static inline void __deprecated ctrl_outq(u64 v, unsigned long addr)
-{
-	__raw_writeq(v, addr);
-}
-
-extern unsigned long generic_io_base;
-
-static inline void ctrl_delay(void)
-{
-	__raw_readw(generic_io_base);
-}
+#define readb_relaxed(c)	({ u8  __v = __raw_readb(c); __v; })
+#define readw_relaxed(c)	({ u16 __v = le16_to_cpu((__force __le16) \
+					__raw_readw(c)); __v; })
+#define readl_relaxed(c)	({ u32 __v = le32_to_cpu((__force __le32) \
+					__raw_readl(c)); __v; })
+#define readq_relaxed(c)	({ u64 __v = le64_to_cpu((__force __le64) \
+					__raw_readq(c)); __v; })
+
+#define writeb_relaxed(v,c)	((void)__raw_writeb(v,c))
+#define writew_relaxed(v,c)	((void)__raw_writew((__force u16) \
+					cpu_to_le16(v),c))
+#define writel_relaxed(v,c)	((void)__raw_writel((__force u32) \
+					cpu_to_le32(v),c))
+#define writeq_relaxed(v,c)	((void)__raw_writeq((__force u64) \
+					cpu_to_le64(v),c))
+
+#define readb(a)		({ u8  r_ = readb_relaxed(a); rmb(); r_; })
+#define readw(a)		({ u16 r_ = readw_relaxed(a); rmb(); r_; })
+#define readl(a)		({ u32 r_ = readl_relaxed(a); rmb(); r_; })
+#define readq(a)		({ u64 r_ = readq_relaxed(a); rmb(); r_; })
+
+#define writeb(v,a)		({ wmb(); writeb_relaxed((v),(a)); })
+#define writew(v,a)		({ wmb(); writew_relaxed((v),(a)); })
+#define writel(v,a)		({ wmb(); writel_relaxed((v),(a)); })
+#define writeq(v,a)		({ wmb(); writeq_relaxed((v),(a)); })
+
+#define readsb(p,d,l)		__raw_readsb(p,d,l)
+#define readsw(p,d,l)		__raw_readsw(p,d,l)
+#define readsl(p,d,l)		__raw_readsl(p,d,l)
+
+#define writesb(p,d,l)		__raw_writesb(p,d,l)
+#define writesw(p,d,l)		__raw_writesw(p,d,l)
+#define writesl(p,d,l)		__raw_writesl(p,d,l)
 
 #define __BUILD_UNCACHED_IO(bwlq, type)					\
 static inline type read##bwlq##_uncached(unsigned long addr)		\
@@ -159,10 +96,11 @@ __BUILD_UNCACHED_IO(w, u16)
 __BUILD_UNCACHED_IO(l, u32)
 __BUILD_UNCACHED_IO(q, u64)
 
-#define __BUILD_MEMORY_STRING(bwlq, type)				\
+#define __BUILD_MEMORY_STRING(pfx, bwlq, type)				\
 									\
-static inline void __raw_writes##bwlq(volatile void __iomem *mem,	\
-				const void *addr, unsigned int count)	\
+static inline void							\
+pfx##writes##bwlq(volatile void __iomem *mem, const void *addr,		\
+		  unsigned int count)					\
 {									\
 	const volatile type *__addr = addr;				\
 									\
@@ -172,8 +110,8 @@ static inline void __raw_writes##bwlq(volatile void __iomem *mem,	\
 	}								\
 }									\
 									\
-static inline void __raw_reads##bwlq(volatile void __iomem *mem,	\
-			       void *addr, unsigned int count)		\
+static inline void pfx##reads##bwlq(volatile void __iomem *mem,		\
+				    void *addr, unsigned int count)	\
 {									\
 	volatile type *__addr = addr;					\
 									\
@@ -183,85 +121,166 @@ static inline void __raw_reads##bwlq(volatile void __iomem *mem,	\
 	}								\
 }
 
-__BUILD_MEMORY_STRING(b, u8)
-__BUILD_MEMORY_STRING(w, u16)
+__BUILD_MEMORY_STRING(__raw_, b, u8)
+__BUILD_MEMORY_STRING(__raw_, w, u16)
 
 #ifdef CONFIG_SUPERH32
 void __raw_writesl(void __iomem *addr, const void *data, int longlen);
 void __raw_readsl(const void __iomem *addr, void *data, int longlen);
 #else
-__BUILD_MEMORY_STRING(l, u32)
+__BUILD_MEMORY_STRING(__raw_, l, u32)
 #endif
 
-__BUILD_MEMORY_STRING(q, u64)
-
-#define writesb			__raw_writesb
-#define writesw			__raw_writesw
-#define writesl			__raw_writesl
-
-#define readsb			__raw_readsb
-#define readsw			__raw_readsw
-#define readsl			__raw_readsl
-
-#define readb_relaxed(a)	readb(a)
-#define readw_relaxed(a)	readw(a)
-#define readl_relaxed(a)	readl(a)
-#define readq_relaxed(a)	readq(a)
-
-#ifndef CONFIG_GENERIC_IOMAP
-/* Simple MMIO */
-#define ioread8(a)		__raw_readb(a)
-#define ioread16(a)		__raw_readw(a)
-#define ioread16be(a)		be16_to_cpu(__raw_readw((a)))
-#define ioread32(a)		__raw_readl(a)
-#define ioread32be(a)		be32_to_cpu(__raw_readl((a)))
-
-#define iowrite8(v,a)		__raw_writeb((v),(a))
-#define iowrite16(v,a)		__raw_writew((v),(a))
-#define iowrite16be(v,a)	__raw_writew(cpu_to_be16((v)),(a))
-#define iowrite32(v,a)		__raw_writel((v),(a))
-#define iowrite32be(v,a)	__raw_writel(cpu_to_be32((v)),(a))
-
-#define ioread8_rep(a, d, c)	__raw_readsb((a), (d), (c))
-#define ioread16_rep(a, d, c)	__raw_readsw((a), (d), (c))
-#define ioread32_rep(a, d, c)	__raw_readsl((a), (d), (c))
-
-#define iowrite8_rep(a, s, c)	__raw_writesb((a), (s), (c))
-#define iowrite16_rep(a, s, c)	__raw_writesw((a), (s), (c))
-#define iowrite32_rep(a, s, c)	__raw_writesl((a), (s), (c))
+__BUILD_MEMORY_STRING(__raw_, q, u64)
+
+#ifdef CONFIG_HAS_IOPORT
+
+/*
+ * Slowdown I/O port space accesses for antique hardware.
+ */
+#undef CONF_SLOWDOWN_IO
+
+/*
+ * On SuperH I/O ports are memory mapped, so we access them using normal
+ * load/store instructions. sh_io_port_base is the virtual address to
+ * which all ports are being mapped.
+ */
+extern const unsigned long sh_io_port_base;
+
+static inline void __set_io_port_base(unsigned long pbase)
+{
+	*(unsigned long *)&sh_io_port_base = pbase;
+	barrier();
+}
+
+#ifdef CONFIG_GENERIC_IOMAP
+#define __ioport_map ioport_map
+#else
+extern void __iomem *__ioport_map(unsigned long addr, unsigned int size);
 #endif
 
-#define mmio_insb(p,d,c)	__raw_readsb(p,d,c)
-#define mmio_insw(p,d,c)	__raw_readsw(p,d,c)
-#define mmio_insl(p,d,c)	__raw_readsl(p,d,c)
+#ifdef CONF_SLOWDOWN_IO
+#define SLOW_DOWN_IO __raw_readw(sh_io_port_base)
+#else
+#define SLOW_DOWN_IO
+#endif
 
-#define mmio_outsb(p,s,c)	__raw_writesb(p,s,c)
-#define mmio_outsw(p,s,c)	__raw_writesw(p,s,c)
-#define mmio_outsl(p,s,c)	__raw_writesl(p,s,c)
+#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p, slow)			\
+									\
+static inline void pfx##out##bwlq##p(type val, unsigned long port)	\
+{									\
+	volatile type *__addr;						\
+									\
+	__addr = __ioport_map(port, sizeof(type));			\
+	*__addr = val;							\
+	slow;								\
+}									\
+									\
+static inline type pfx##in##bwlq##p(unsigned long port)			\
+{									\
+	volatile type *__addr;						\
+	type __val;							\
+									\
+	__addr = __ioport_map(port, sizeof(type));			\
+	__val = *__addr;						\
+	slow;								\
+									\
+	return __val;							\
+}
 
-/* synco on SH-4A, otherwise a nop */
-#define mmiowb()		wmb()
+#define __BUILD_IOPORT_PFX(bus, bwlq, type)				\
+	__BUILD_IOPORT_SINGLE(bus, bwlq, type, ,)			\
+	__BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
 
-#define IO_SPACE_LIMIT 0xffffffff
+#define BUILDIO_IOPORT(bwlq, type)					\
+	__BUILD_IOPORT_PFX(, bwlq, type)
 
-#ifdef CONFIG_HAS_IOPORT
+BUILDIO_IOPORT(b, u8)
+BUILDIO_IOPORT(w, u16)
+BUILDIO_IOPORT(l, u32)
+BUILDIO_IOPORT(q, u64)
+
+#define __BUILD_IOPORT_STRING(bwlq, type)				\
+									\
+static inline void outs##bwlq(unsigned long port, const void *addr,	\
+			      unsigned int count)			\
+{									\
+	const volatile type *__addr = addr;				\
+									\
+	while (count--) {						\
+		out##bwlq(*__addr, port);				\
+		__addr++;						\
+	}								\
+}									\
+									\
+static inline void ins##bwlq(unsigned long port, void *addr,		\
+			     unsigned int count)			\
+{									\
+	volatile type *__addr = addr;					\
+									\
+	while (count--) {						\
+		*__addr = in##bwlq(port);				\
+		__addr++;						\
+	}								\
+}
+
+__BUILD_IOPORT_STRING(b, u8)
+__BUILD_IOPORT_STRING(w, u16)
+__BUILD_IOPORT_STRING(l, u32)
+__BUILD_IOPORT_STRING(q, u64)
+
+#endif
 
 /*
- * This function provides a method for the generic case where a
- * board-specific ioport_map simply needs to return the port + some
- * arbitrary port base.
+ * Legacy SuperH on-chip I/O functions
  *
- * We use this at board setup time to implicitly set the port base, and
- * as a result, we can use the generic ioport_map.
+ * These are all deprecated, all new (and especially cross-platform) code
+ * should be using the __raw_xxx() routines directly.
  */
-static inline void __set_io_port_base(unsigned long pbase)
+static inline u8 __deprecated ctrl_inb(unsigned long addr)
 {
-	generic_io_base = pbase;
+	return __raw_readb(addr);
 }
 
-#define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n))
+static inline u16 __deprecated ctrl_inw(unsigned long addr)
+{
+	return __raw_readw(addr);
+}
 
-#endif
+static inline u32 __deprecated ctrl_inl(unsigned long addr)
+{
+	return __raw_readl(addr);
+}
+
+static inline u64 __deprecated ctrl_inq(unsigned long addr)
+{
+	return __raw_readq(addr);
+}
+
+static inline void __deprecated ctrl_outb(u8 v, unsigned long addr)
+{
+	__raw_writeb(v, addr);
+}
+
+static inline void __deprecated ctrl_outw(u16 v, unsigned long addr)
+{
+	__raw_writew(v, addr);
+}
+
+static inline void __deprecated ctrl_outl(u32 v, unsigned long addr)
+{
+	__raw_writel(v, addr);
+}
+
+static inline void __deprecated ctrl_outq(u64 v, unsigned long addr)
+{
+	__raw_writeq(v, addr);
+}
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/* synco on SH-4A, otherwise a nop */
+#define mmiowb()		wmb()
 
 /* We really want to try and get these to memcpy etc */
 void memcpy_fromio(void *, const volatile void __iomem *, unsigned long);
@@ -395,10 +414,6 @@ static inline int iounmap_fixed(void __iomem *addr) { return -EINVAL; }
 #define ioremap_nocache	ioremap
 #define iounmap		__iounmap
 
-#define maybebadio(port) \
-	printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \
-	       __func__, __LINE__, (port), (u32)__builtin_return_address(0))
-
 /*
  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
  * access