#define PIO_RESERVED 0x40000UL
#endif
+static void bad_io_access(unsigned long port, const char *access)
+{
+ static int count = 10;
+ if (count) {
+ count--;
+ printk(KERN_ERR "Bad IO access at port %lx (%s)\n", port, access);
+ WARN_ON(1);
+ }
+}
+
/*
* Ugly macros are a way of life.
*/
-#define VERIFY_PIO(port) BUG_ON((port & ~PIO_MASK) != PIO_OFFSET)
-
#define IO_COND(addr, is_pio, is_mmio) do { \
unsigned long port = (unsigned long __force)addr; \
- if (port < PIO_RESERVED) { \
- VERIFY_PIO(port); \
+ if (port >= PIO_RESERVED) { \
+ is_mmio; \
+ } else if (port > PIO_OFFSET) { \
port &= PIO_MASK; \
is_pio; \
- } else { \
- is_mmio; \
- } \
+ } else \
+ bad_io_access(port, #is_pio ); \
} while (0)
#ifndef pio_read16be
unsigned int fastcall ioread8(void __iomem *addr)
{
IO_COND(addr, return inb(port), return readb(addr));
+ return 0xff;
}
unsigned int fastcall ioread16(void __iomem *addr)
{
IO_COND(addr, return inw(port), return readw(addr));
+ return 0xffff;
}
unsigned int fastcall ioread16be(void __iomem *addr)
{
IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr));
+ return 0xffff;
}
unsigned int fastcall ioread32(void __iomem *addr)
{
IO_COND(addr, return inl(port), return readl(addr));
+ return 0xffffffff;
}
unsigned int fastcall ioread32be(void __iomem *addr)
{
IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr));
+ return 0xffffffff;
}
EXPORT_SYMBOL(ioread8);
EXPORT_SYMBOL(ioread16);
EXPORT_SYMBOL(ioport_map);
EXPORT_SYMBOL(ioport_unmap);
-/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
+/**
+ * pci_iomap - create a virtual mapping cookie for a PCI BAR
+ * @dev: PCI device that owns the BAR
+ * @bar: BAR number
+ * @maxlen: length of the memory to map
+ *
+ * Using this function you will get a __iomem address to your device BAR.
+ * You can access it using ioread*() and iowrite*(). These functions hide
+ * the details if this is a MMIO or PIO address space and will just do what
+ * you expect from them in the correct way.
+ *
+ * @maxlen specifies the maximum length to map. If you want to get access to
+ * the complete BAR without checking for its length first, pass %0 here.
+ * */
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
unsigned long start = pci_resource_start(dev, bar);