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>
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 650b92f..e25f3c6 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -12,7 +12,7 @@
CFLAGS_REMOVE_return_address.o = -pg
obj-y := clkdev.o debugtraps.o dma-nommu.o dumpstack.o \
- idle.o io.o io_generic.o irq.o \
+ idle.o io.o irq.o \
irq_$(BITS).o machvec.o nmi_debug.o process.o \
process_$(BITS).o ptrace_$(BITS).o \
reboot.o return_address.o \
@@ -39,6 +39,7 @@
obj-$(CONFIG_HIBERNATION) += swsusp.o
obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_callchain.o
+obj-$(CONFIG_HAS_IOPORT) += io_generic.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += localtimer.o
diff --git a/arch/sh/kernel/io.c b/arch/sh/kernel/io.c
index 4770c24..5c51b79 100644
--- a/arch/sh/kernel/io.c
+++ b/arch/sh/kernel/io.c
@@ -112,25 +112,3 @@
}
}
EXPORT_SYMBOL(memset_io);
-
-#ifndef CONFIG_GENERIC_IOMAP
-
-void __iomem *ioport_map(unsigned long port, unsigned int nr)
-{
- void __iomem *ret;
-
- ret = __ioport_map_trapped(port, nr);
- if (ret)
- return ret;
-
- return __ioport_map(port, nr);
-}
-EXPORT_SYMBOL(ioport_map);
-
-void ioport_unmap(void __iomem *addr)
-{
- sh_mv.mv_ioport_unmap(addr);
-}
-EXPORT_SYMBOL(ioport_unmap);
-
-#endif /* CONFIG_GENERIC_IOMAP */
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index e1e1dbd..447d78f 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -158,3 +158,23 @@
void generic_ioport_unmap(void __iomem *addr)
{
}
+
+#ifndef CONFIG_GENERIC_IOMAP
+void __iomem *ioport_map(unsigned long port, unsigned int nr)
+{
+ void __iomem *ret;
+
+ ret = __ioport_map_trapped(port, nr);
+ if (ret)
+ return ret;
+
+ return __ioport_map(port, nr);
+}
+EXPORT_SYMBOL(ioport_map);
+
+void ioport_unmap(void __iomem *addr)
+{
+ sh_mv.mv_ioport_unmap(addr);
+}
+EXPORT_SYMBOL(ioport_unmap);
+#endif /* CONFIG_GENERIC_IOMAP */
diff --git a/arch/sh/kernel/io_trapped.c b/arch/sh/kernel/io_trapped.c
index 4a8bb4e..2947d2b 100644
--- a/arch/sh/kernel/io_trapped.c
+++ b/arch/sh/kernel/io_trapped.c
@@ -91,10 +91,14 @@
tiop->magic = IO_TRAPPED_MAGIC;
INIT_LIST_HEAD(&tiop->list);
spin_lock_irq(&trapped_lock);
+#ifdef CONFIG_HAS_IOPORT
if (flags & IORESOURCE_IO)
list_add(&tiop->list, &trapped_io);
+#endif
+#ifdef CONFIG_HAS_IOMEM
if (flags & IORESOURCE_MEM)
list_add(&tiop->list, &trapped_mem);
+#endif
spin_unlock_irq(&trapped_lock);
return 0;
diff --git a/arch/sh/kernel/machvec.c b/arch/sh/kernel/machvec.c
index 85cfaf9..9f9bb63 100644
--- a/arch/sh/kernel/machvec.c
+++ b/arch/sh/kernel/machvec.c
@@ -118,6 +118,14 @@
sh_mv.mv_##elem = generic_##elem; \
} while (0)
+#ifdef CONFIG_HAS_IOPORT
+
+#ifdef P2SEG
+ __set_io_port_base(P2SEG);
+#else
+ __set_io_port_base(0);
+#endif
+
mv_set(inb); mv_set(inw); mv_set(inl);
mv_set(outb); mv_set(outw); mv_set(outl);
@@ -129,16 +137,13 @@
mv_set(ioport_map);
mv_set(ioport_unmap);
+
+#endif
+
mv_set(irq_demux);
mv_set(mode_pins);
mv_set(mem_init);
if (!sh_mv.mv_nr_irqs)
sh_mv.mv_nr_irqs = NR_IRQS;
-
-#ifdef P2SEG
- __set_io_port_base(P2SEG);
-#else
- __set_io_port_base(0);
-#endif
}