diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/iomap.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/lib/iomap.c b/lib/iomap.c index 4d43f37c015..a57d262a5ed 100644 --- a/lib/iomap.c +++ b/lib/iomap.c @@ -35,20 +35,28 @@ #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 @@ -64,22 +72,27 @@ 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); |