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--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -125,9 +125,11 @@ obj-$(CONFIG_FSL_EMB_PERF_EVENT_E500) +=
obj-$(CONFIG_8XX_MINIMAL_FPEMU) += softemu8xx.o
+ifneq ($(CONFIG_RB_IOMAP),y)
ifneq ($(CONFIG_PPC_INDIRECT_IO),y)
obj-y += iomap.o
endif
+endif
obj-$(CONFIG_PPC64) += $(obj64-y)
obj-$(CONFIG_PPC32) += $(obj32-y)
--- a/arch/powerpc/platforms/83xx/Makefile
+++ b/arch/powerpc/platforms/83xx/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_MCU_MPC8349EMITX) += mcu_mp
obj-$(CONFIG_MPC830x_RDB) += mpc830x_rdb.o
obj-$(CONFIG_MPC831x_RDB) += mpc831x_rdb.o
obj-$(CONFIG_MPC832x_RDB) += mpc832x_rdb.o
+obj-$(CONFIG_RB_PPC) += rbppc.o
obj-$(CONFIG_MPC834x_MDS) += mpc834x_mds.o
obj-$(CONFIG_MPC834x_ITX) += mpc834x_itx.o
obj-$(CONFIG_MPC836x_MDS) += mpc836x_mds.o
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -175,6 +175,10 @@ config PPC_INDIRECT_MMIO
config PPC_IO_WORKAROUNDS
bool
+config RB_IOMAP
+ bool
+ default y if RB_PPC
+
source "drivers/cpufreq/Kconfig"
menu "CPU Frequency drivers"
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -65,3 +65,5 @@ obj-$(CONFIG_PPC_SCOM) += scom.o
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
obj-$(CONFIG_PPC_XICS) += xics/
+
+obj-$(CONFIG_RB_IOMAP) += rb_iomap.o
--- /dev/null
+++ b/arch/powerpc/sysdev/rb_iomap.c
@@ -0,0 +1,204 @@
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/mm.h>
+#include <asm/io.h>
+
+#define LOCALBUS_START 0x40000000
+#define LOCALBUS_MASK 0x007fffff
+#define LOCALBUS_REGMASK 0x001fffff
+
+static void __iomem *localbus_base;
+
+static inline int is_localbus(void __iomem *addr)
+{
+ return ((unsigned) addr & ~LOCALBUS_MASK) == LOCALBUS_START;
+}
+
+static inline unsigned localbus_regoff(unsigned reg) {
+ return (reg << 16) | (((reg ^ 8) & 8) << 17);
+}
+
+static inline void __iomem *localbus_addr(void __iomem *addr)
+{
+ return localbus_base
+ + ((unsigned) addr & LOCALBUS_MASK & ~LOCALBUS_REGMASK)
+ + localbus_regoff((unsigned) addr & LOCALBUS_REGMASK);
+}
+
+unsigned int ioread8(void __iomem *addr)
+{
+ if (is_localbus(addr))
+ return in_be16(localbus_addr(addr)) >> 8;
+ return readb(addr);
+}
+EXPORT_SYMBOL(ioread8);
+
+unsigned int ioread16(void __iomem *addr)
+{
+ if (is_localbus(addr))
+ return le16_to_cpu(in_be16(localbus_addr(addr)));
+ return readw(addr);
+}
+EXPORT_SYMBOL(ioread16);
+
+unsigned int ioread16be(void __iomem *addr)
+{
+ return in_be16(addr);
+}
+EXPORT_SYMBOL(ioread16be);
+
+unsigned int ioread32(void __iomem *addr)
+{
+ return readl(addr);
+}
+EXPORT_SYMBOL(ioread32);
+
+unsigned int ioread32be(void __iomem *addr)
+{
+ return in_be32(addr);
+}
+EXPORT_SYMBOL(ioread32be);
+
+void iowrite8(u8 val, void __iomem *addr)
+{
+ if (is_localbus(addr))
+ out_be16(localbus_addr(addr), ((u16) val) << 8);
+ else
+ writeb(val, addr);
+}
+EXPORT_SYMBOL(iowrite8);
+
+void iowrite16(u16 val, void __iomem *addr)
+{
+ if (is_localbus(addr))
+ out_be16(localbus_addr(addr), cpu_to_le16(val));
+ else
+ writew(val, addr);
+}
+EXPORT_SYMBOL(iowrite16);
+
+void iowrite16be(u16 val, void __iomem *addr)
+{
+ out_be16(addr, val);
+}
+EXPORT_SYMBOL(iowrite16be);
+
+void iowrite32(u32 val, void __iomem *addr)
+{
+ writel(val, addr);
+}
+EXPORT_SYMBOL(iowrite32);
+
+void iowrite32be(u32 val, void __iomem *addr)
+{
+ out_be32(addr, val);
+}
+EXPORT_SYMBOL(iowrite32be);
+
+void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
+{
+ if (is_localbus(addr)) {
+ unsigned i;
+ void *laddr = localbus_addr(addr);
+ u8 *buf = dst;
+
+ for (i = 0; i < count; ++i) {
+ *buf++ = in_be16(laddr) >> 8;
+ }
+ } else {
+ _insb((u8 __iomem *) addr, dst, count);
+ }
+}
+EXPORT_SYMBOL(ioread8_rep);
+
+void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
+{
+ if (is_localbus(addr)) {
+ unsigned i;
+ void *laddr = localbus_addr(addr);
+ u16 *buf = dst;
+
+ for (i = 0; i < count; ++i) {
+ *buf++ = in_be16(laddr);
+ }
+ } else {
+ _insw_ns((u16 __iomem *) addr, dst, count);
+ }
+}
+EXPORT_SYMBOL(ioread16_rep);
+
+void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
+{
+ _insl_ns((u32 __iomem *) addr, dst, count);
+}
+EXPORT_SYMBOL(ioread32_rep);
+
+void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
+{
+ if (is_localbus(addr)) {
+ unsigned i;
+ void *laddr = localbus_addr(addr);
+ const u8 *buf = src;
+
+ for (i = 0; i < count; ++i) {
+ out_be16(laddr, ((u16) *buf++) << 8);
+ }
+ } else {
+ _outsb((u8 __iomem *) addr, src, count);
+ }
+}
+EXPORT_SYMBOL(iowrite8_rep);
+
+void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
+{
+ if (is_localbus(addr)) {
+ unsigned i;
+ void *laddr = localbus_addr(addr);
+ const u16 *buf = src;
+
+ for (i = 0; i < count; ++i) {
+ out_be16(laddr, *buf++);
+ }
+ } else {
+ _outsw_ns((u16 __iomem *) addr, src, count);
+ }
+}
+EXPORT_SYMBOL(iowrite16_rep);
+
+void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
+{
+ _outsl_ns((u32 __iomem *) addr, src, count);
+}
+EXPORT_SYMBOL(iowrite32_rep);
+
+void __iomem *ioport_map(unsigned long port, unsigned int len)
+{
+ return (void __iomem *) (port + _IO_BASE);
+}
+EXPORT_SYMBOL(ioport_unmap);
+
+void ioport_unmap(void __iomem *addr)
+{
+ /* Nothing to do */
+}
+EXPORT_SYMBOL(ioport_map);
+
+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
+{
+ /* Nothing to do */
+}
+EXPORT_SYMBOL(pci_iounmap);
+
+void __iomem *localbus_map(unsigned long addr, unsigned int len)
+{
+ if (!localbus_base)
+ localbus_base = ioremap(addr & ~LOCALBUS_MASK,
+ LOCALBUS_MASK + 1);
+ return (void *) (LOCALBUS_START + (addr & LOCALBUS_MASK));
+}
+EXPORT_SYMBOL(localbus_map);
+
+void localbus_unmap(void __iomem *addr)
+{
+}
+EXPORT_SYMBOL(localbus_unmap);
--- a/arch/powerpc/platforms/83xx/Kconfig
+++ b/arch/powerpc/platforms/83xx/Kconfig
@@ -44,6 +44,7 @@ config RB_PPC
select QUICC_ENGINE
select PPC_MPC832x
select PPC_MPC834x
+ select RB_IOMAP
help
This option enables support for MikroTik RouterBOARD 333/600 series boards.
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