sh: support for platforms without PIO.

This extends some of the existing special casing for HAS_IOPORT
platforms and gets it to the point where platforms can begin to
conditionally select it.

The major changes here are that the PIO routines themselves go away
completely, including all of the machvec port mapping wrappers. With this
in place it's possible for any non-machvec abusing platform to disable
PIO completely. At present this is left as an opt-in until the abusers
are the odd ones out instead of the majority.

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

2 files changed, 13 insertions, 4 deletions

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index f689554e17c1..b237d525d592 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -39,6 +39,8 @@
 #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))
@@ -60,6 +62,8 @@
 #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))
@@ -240,6 +244,8 @@ __BUILD_MEMORY_STRING(q, u64)
 
 #define IO_SPACE_LIMIT 0xffffffff
 
+#ifdef CONFIG_HAS_IOPORT
+
 /*
  * This function provides a method for the generic case where a
  * board-specific ioport_map simply needs to return the port + some
@@ -255,6 +261,8 @@ static inline void __set_io_port_base(unsigned long pbase)
 
 #define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n))
 
+#endif
+
 /* We really want to try and get these to memcpy etc */
 void memcpy_fromio(void *, const volatile void __iomem *, unsigned long);
 void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
diff --git a/arch/sh/include/asm/machvec.h b/arch/sh/include/asm/machvec.h
index bc0218cb72e1..a0b0cf79cf8a 100644
--- a/arch/sh/include/asm/machvec.h
+++ b/arch/sh/include/asm/machvec.h
@@ -19,6 +19,10 @@ struct sh_machine_vector {
         const char *mv_name;
         int mv_nr_irqs;
 
+        int (*mv_irq_demux)(int irq);
+        void (*mv_init_irq)(void);
+
+#ifdef CONFIG_HAS_IOPORT
         u8 (*mv_inb)(unsigned long);
         u16 (*mv_inw)(unsigned long);
         u32 (*mv_inl)(unsigned long);
@@ -40,12 +44,9 @@ struct sh_machine_vector {
         void (*mv_outsw)(unsigned long, const void *src, unsigned long count);
         void (*mv_outsl)(unsigned long, const void *src, unsigned long count);
 
-        int (*mv_irq_demux)(int irq);
-
-        void (*mv_init_irq)(void);
-
         void __iomem *(*mv_ioport_map)(unsigned long port, unsigned int size);
         void (*mv_ioport_unmap)(void __iomem *);
+#endif
 
         int (*mv_clk_init)(void);
         int (*mv_mode_pins)(void);