You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
227 lines
4.9 KiB
Diff
227 lines
4.9 KiB
Diff
--- /dev/null
|
|
+++ b/arch/powerpc/sysdev/rb_iomap.c
|
|
@@ -0,0 +1,223 @@
|
|
+#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 __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
|
|
+{
|
|
+ unsigned long start = pci_resource_start(dev, bar);
|
|
+ unsigned long len = pci_resource_len(dev, bar);
|
|
+ unsigned long flags = pci_resource_flags(dev, bar);
|
|
+
|
|
+ if (!len)
|
|
+ return NULL;
|
|
+ if (max && len > max)
|
|
+ len = max;
|
|
+ if (flags & IORESOURCE_IO)
|
|
+ return ioport_map(start, len);
|
|
+ if (flags & IORESOURCE_MEM)
|
|
+ return ioremap(start, len);
|
|
+ /* What? */
|
|
+ return NULL;
|
|
+}
|
|
+EXPORT_SYMBOL(pci_iomap);
|
|
+
|
|
+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);
|