#include <asm/processor.h>
#include <asm/string.h>
+#include <ioremap.h>
#include <mangle-port.h>
/*
static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
unsigned long flags)
{
+#define __IS_LOW512(addr) (!((phys_t)(addr) & (phys_t) ~0x1fffffffULL))
+
if (cpu_has_64bit_addresses) {
u64 base = UNCAC_BASE;
if (flags == _CACHE_UNCACHED)
base = (u64) IO_BASE;
return (void __iomem *) (unsigned long) (base + offset);
+ } else if (__builtin_constant_p(offset) &&
+ __builtin_constant_p(size) && __builtin_constant_p(flags)) {
+ phys_t phys_addr, last_addr;
+
+ phys_addr = fixup_bigphys_addr(offset, size);
+
+ /* Don't allow wraparound or zero size. */
+ last_addr = phys_addr + size - 1;
+ if (!size || last_addr < phys_addr)
+ return NULL;
+
+ /*
+ * Map uncached objects in the low 512MB of address
+ * space using KSEG1.
+ */
+ if (__IS_LOW512(phys_addr) && __IS_LOW512(last_addr) &&
+ flags == _CACHE_UNCACHED)
+ return (void __iomem *)CKSEG1ADDR(phys_addr);
}
return __ioremap(offset, size, flags);
+
+#undef __IS_LOW512
}
/*
static inline void iounmap(volatile void __iomem *addr)
{
- if (cpu_has_64bit_addresses)
+#define __IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)
+
+ if (cpu_has_64bit_addresses ||
+ (__builtin_constant_p(addr) && __IS_KSEG1(addr)))
return;
__iounmap(addr);
-}
+#undef __IS_KSEG1
+}
#define __BUILD_MEMORY_SINGLE(pfx, bwlq, type, irq) \
\
\
__val = pfx##ioswab##bwlq(val); \
\
- if (sizeof(type) != sizeof(u64)) { \
- *__addr = __val; \
- slow; \
- } else \
- BUILD_BUG(); \
+ /* Really, we want this to be atomic */ \
+ BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
+ \
+ *__addr = __val; \
+ slow; \
} \
\
static inline type pfx##in##bwlq##p(unsigned long port) \
port = __swizzle_addr_##bwlq(port); \
__addr = (void *)(mips_io_port_base + port); \
\
- if (sizeof(type) != sizeof(u64)) { \
- __val = *__addr; \
- slow; \
- } else { \
- __val = 0; \
- BUILD_BUG(); \
- } \
+ BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
+ \
+ __val = *__addr; \
+ slow; \
\
return pfx##ioswab##bwlq(__val); \
}
\
__BUILD_MEMORY_SINGLE(bus, bwlq, type, 1)
-#define __BUILD_IOPORT_PFX(bus, bwlq, type) \
- \
-__BUILD_IOPORT_SINGLE(bus, bwlq, type, ,) \
-__BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
-
-#define BUILDIO(bwlq, type) \
+#define BUILDIO_MEM(bwlq, type) \
\
__BUILD_MEMORY_PFX(__raw_, bwlq, type) \
__BUILD_MEMORY_PFX(, bwlq, type) \
__BUILD_MEMORY_PFX(mem_, bwlq, type) \
-__BUILD_IOPORT_PFX(, bwlq, type) \
-__BUILD_IOPORT_PFX(mem_, bwlq, type)
+
+BUILDIO_MEM(b, u8)
+BUILDIO_MEM(w, u16)
+BUILDIO_MEM(l, u32)
+BUILDIO_MEM(q, u64)
+
+#define __BUILD_IOPORT_PFX(bus, bwlq, type) \
+ __BUILD_IOPORT_SINGLE(bus, bwlq, type, ,) \
+ __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
+
+#define BUILDIO_IOPORT(bwlq, type) \
+ __BUILD_IOPORT_PFX(, bwlq, type) \
+ __BUILD_IOPORT_PFX(mem_, bwlq, type)
+
+BUILDIO_IOPORT(b, u8)
+BUILDIO_IOPORT(w, u16)
+BUILDIO_IOPORT(l, u32)
+#ifdef CONFIG_64BIT
+BUILDIO_IOPORT(q, u64)
+#endif
#define __BUILDIO(bwlq, type) \
\
__BUILD_MEMORY_SINGLE(____raw_, bwlq, type, 0)
-BUILDIO(b, u8)
-BUILDIO(w, u16)
-BUILDIO(l, u32)
-BUILDIO(q, u64)
-
__BUILDIO(q, u64)
#define readb_relaxed readb
BUILDSTRING(b, u8)
BUILDSTRING(w, u16)
BUILDSTRING(l, u32)
+#ifdef CONFIG_64BIT
BUILDSTRING(q, u64)
+#endif
/* Depends on MIPS II instruction set */