227 lines
4.9 KiB
Diff
227 lines
4.9 KiB
Diff
--- /dev/null
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+++ b/arch/powerpc/sysdev/rb_iomap.c
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@@ -0,0 +1,223 @@
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+#include <linux/init.h>
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+#include <linux/pci.h>
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+#include <linux/mm.h>
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+#include <asm/io.h>
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+
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+#define LOCALBUS_START 0x40000000
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+#define LOCALBUS_MASK 0x007fffff
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+#define LOCALBUS_REGMASK 0x001fffff
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+
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+static void __iomem *localbus_base;
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+
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+static inline int is_localbus(void __iomem *addr)
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+{
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+ return ((unsigned) addr & ~LOCALBUS_MASK) == LOCALBUS_START;
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+}
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+
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+static inline unsigned localbus_regoff(unsigned reg) {
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+ return (reg << 16) | (((reg ^ 8) & 8) << 17);
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+}
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+
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+static inline void __iomem *localbus_addr(void __iomem *addr)
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+{
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+ return localbus_base
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+ + ((unsigned) addr & LOCALBUS_MASK & ~LOCALBUS_REGMASK)
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+ + localbus_regoff((unsigned) addr & LOCALBUS_REGMASK);
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+}
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+
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+unsigned int ioread8(void __iomem *addr)
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+{
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+ if (is_localbus(addr))
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+ return in_be16(localbus_addr(addr)) >> 8;
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+ return readb(addr);
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+}
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+EXPORT_SYMBOL(ioread8);
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+
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+unsigned int ioread16(void __iomem *addr)
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+{
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+ if (is_localbus(addr))
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+ return le16_to_cpu(in_be16(localbus_addr(addr)));
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+ return readw(addr);
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+}
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+EXPORT_SYMBOL(ioread16);
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+
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+unsigned int ioread16be(void __iomem *addr)
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+{
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+ return in_be16(addr);
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+}
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+EXPORT_SYMBOL(ioread16be);
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+
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+unsigned int ioread32(void __iomem *addr)
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+{
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+ return readl(addr);
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+}
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+EXPORT_SYMBOL(ioread32);
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+
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+unsigned int ioread32be(void __iomem *addr)
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+{
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+ return in_be32(addr);
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+}
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+EXPORT_SYMBOL(ioread32be);
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+
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+void iowrite8(u8 val, void __iomem *addr)
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+{
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+ if (is_localbus(addr))
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+ out_be16(localbus_addr(addr), ((u16) val) << 8);
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+ else
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+ writeb(val, addr);
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+}
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+EXPORT_SYMBOL(iowrite8);
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+
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+void iowrite16(u16 val, void __iomem *addr)
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+{
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+ if (is_localbus(addr))
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+ out_be16(localbus_addr(addr), cpu_to_le16(val));
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+ else
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+ writew(val, addr);
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+}
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+EXPORT_SYMBOL(iowrite16);
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+
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+void iowrite16be(u16 val, void __iomem *addr)
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+{
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+ out_be16(addr, val);
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+}
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+EXPORT_SYMBOL(iowrite16be);
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+
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+void iowrite32(u32 val, void __iomem *addr)
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+{
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+ writel(val, addr);
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+}
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+EXPORT_SYMBOL(iowrite32);
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+
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+void iowrite32be(u32 val, void __iomem *addr)
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+{
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+ out_be32(addr, val);
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+}
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+EXPORT_SYMBOL(iowrite32be);
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+
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+void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
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+{
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+ if (is_localbus(addr)) {
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+ unsigned i;
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+ void *laddr = localbus_addr(addr);
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+ u8 *buf = dst;
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+
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+ for (i = 0; i < count; ++i) {
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+ *buf++ = in_be16(laddr) >> 8;
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+ }
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+ } else {
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+ _insb((u8 __iomem *) addr, dst, count);
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+ }
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+}
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+EXPORT_SYMBOL(ioread8_rep);
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+
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+void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
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+{
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+ if (is_localbus(addr)) {
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+ unsigned i;
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+ void *laddr = localbus_addr(addr);
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+ u16 *buf = dst;
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+
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+ for (i = 0; i < count; ++i) {
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+ *buf++ = in_be16(laddr);
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+ }
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+ } else {
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+ _insw_ns((u16 __iomem *) addr, dst, count);
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+ }
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+}
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+EXPORT_SYMBOL(ioread16_rep);
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+
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+void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
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+{
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+ _insl_ns((u32 __iomem *) addr, dst, count);
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+}
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+EXPORT_SYMBOL(ioread32_rep);
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+
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+void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
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+{
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+ if (is_localbus(addr)) {
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+ unsigned i;
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+ void *laddr = localbus_addr(addr);
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+ const u8 *buf = src;
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+
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+ for (i = 0; i < count; ++i) {
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+ out_be16(laddr, ((u16) *buf++) << 8);
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+ }
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+ } else {
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+ _outsb((u8 __iomem *) addr, src, count);
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+ }
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+}
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+EXPORT_SYMBOL(iowrite8_rep);
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+
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+void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
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+{
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+ if (is_localbus(addr)) {
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+ unsigned i;
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+ void *laddr = localbus_addr(addr);
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+ const u16 *buf = src;
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+
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+ for (i = 0; i < count; ++i) {
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+ out_be16(laddr, *buf++);
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+ }
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+ } else {
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+ _outsw_ns((u16 __iomem *) addr, src, count);
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+ }
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+}
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+EXPORT_SYMBOL(iowrite16_rep);
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+
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+void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
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+{
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+ _outsl_ns((u32 __iomem *) addr, src, count);
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+}
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+EXPORT_SYMBOL(iowrite32_rep);
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+
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+void __iomem *ioport_map(unsigned long port, unsigned int len)
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+{
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+ return (void __iomem *) (port + _IO_BASE);
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+}
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+EXPORT_SYMBOL(ioport_unmap);
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+
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+void ioport_unmap(void __iomem *addr)
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+{
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+ /* Nothing to do */
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+}
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+EXPORT_SYMBOL(ioport_map);
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+
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+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
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+{
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+ unsigned long start = pci_resource_start(dev, bar);
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+ unsigned long len = pci_resource_len(dev, bar);
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+ unsigned long flags = pci_resource_flags(dev, bar);
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+
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+ if (!len)
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+ return NULL;
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+ if (max && len > max)
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+ len = max;
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+ if (flags & IORESOURCE_IO)
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+ return ioport_map(start, len);
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+ if (flags & IORESOURCE_MEM)
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+ return ioremap(start, len);
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+ /* What? */
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+ return NULL;
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+}
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+EXPORT_SYMBOL(pci_iomap);
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+
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+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
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+{
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+ /* Nothing to do */
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+}
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+EXPORT_SYMBOL(pci_iounmap);
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+
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+void __iomem *localbus_map(unsigned long addr, unsigned int len)
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+{
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+ if (!localbus_base)
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+ localbus_base = ioremap(addr & ~LOCALBUS_MASK,
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+ LOCALBUS_MASK + 1);
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+ return (void *) (LOCALBUS_START + (addr & LOCALBUS_MASK));
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+}
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+EXPORT_SYMBOL(localbus_map);
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+
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+void localbus_unmap(void __iomem *addr)
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+{
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+}
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+EXPORT_SYMBOL(localbus_unmap);
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