From: Jay Estabrook This code corrects the behavior of the t2_readX/t2_writeX routines, and t2_ioreadNN/t2_iowriteNN routines. The value T2_DENSE_MEM is now subtracted from the "xaddr" argument in each of the readX/writeX routines, since those routines may be called directly, rather than always through the ioreadNN/iowriteNN routines. Examples of the direct calls, via the __raw_readX/writeX macros, are the memcpy_fromio/toio, _memset_c_io, and scr_memcpyw routines. Signed-off-by: Jay Estabrook Signed-off-by: Ivan Kokshaysky Cc: Richard Henderson Signed-off-by: Andrew Morton --- include/asm-alpha/core_t2.h | 26 ++++++++++++++++---------- 1 files changed, 16 insertions(+), 10 deletions(-) diff -puN include/asm-alpha/core_t2.h~alpha-correct-low-level-i-o-routines-for-sable-lynx include/asm-alpha/core_t2.h --- a/include/asm-alpha/core_t2.h~alpha-correct-low-level-i-o-routines-for-sable-lynx +++ a/include/asm-alpha/core_t2.h @@ -437,9 +437,15 @@ static inline void t2_outl(u32 b, unsign static DEFINE_SPINLOCK(t2_hae_lock); +/* + * NOTE: take T2_DENSE_MEM off in each readX/writeX routine, since + * they may be called directly, rather than through the + * ioreadNN/iowriteNN routines. + */ + __EXTERN_INLINE u8 t2_readb(const volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long result, msb; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -453,7 +459,7 @@ __EXTERN_INLINE u8 t2_readb(const volati __EXTERN_INLINE u16 t2_readw(const volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long result, msb; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -471,7 +477,7 @@ __EXTERN_INLINE u16 t2_readw(const volat */ __EXTERN_INLINE u32 t2_readl(const volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long result, msb; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -485,7 +491,7 @@ __EXTERN_INLINE u32 t2_readl(const volat __EXTERN_INLINE u64 t2_readq(const volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long r0, r1, work, msb; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -501,7 +507,7 @@ __EXTERN_INLINE u64 t2_readq(const volat __EXTERN_INLINE void t2_writeb(u8 b, volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long msb, w; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -515,7 +521,7 @@ __EXTERN_INLINE void t2_writeb(u8 b, vol __EXTERN_INLINE void t2_writew(u16 b, volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long msb, w; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -533,7 +539,7 @@ __EXTERN_INLINE void t2_writew(u16 b, vo */ __EXTERN_INLINE void t2_writel(u32 b, volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long msb; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -546,7 +552,7 @@ __EXTERN_INLINE void t2_writel(u32 b, vo __EXTERN_INLINE void t2_writeq(u64 b, volatile void __iomem *xaddr) { - unsigned long addr = (unsigned long) xaddr; + unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM; unsigned long msb, work; unsigned long flags; spin_lock_irqsave(&t2_hae_lock, flags); @@ -587,14 +593,14 @@ __EXTERN_INLINE int t2_is_mmio(const vol __EXTERN_INLINE unsigned int t2_ioread##NS(void __iomem *xaddr) \ { \ if (t2_is_mmio(xaddr)) \ - return t2_read##OS(xaddr - T2_DENSE_MEM); \ + return t2_read##OS(xaddr); \ else \ return t2_in##OS((unsigned long)xaddr - T2_IO); \ } \ __EXTERN_INLINE void t2_iowrite##NS(u##NS b, void __iomem *xaddr) \ { \ if (t2_is_mmio(xaddr)) \ - t2_write##OS(b, xaddr - T2_DENSE_MEM); \ + t2_write##OS(b, xaddr); \ else \ t2_out##OS(b, (unsigned long)xaddr - T2_IO); \ } _