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-rw-r--r--arch/sh/include/asm/io.h490
1 files changed, 257 insertions, 233 deletions
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index a4fbf0c84fb..728c4c571f4 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -3,143 +3,93 @@
/*
* Convention:
- * read{b,w,l}/write{b,w,l} are for PCI,
+ * read{b,w,l,q}/write{b,w,l,q} are for PCI,
* while in{b,w,l}/out{b,w,l} are for ISA
- * These may (will) be platform specific function.
+ *
* In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p
* and 'string' versions: ins{b,w,l}/outs{b,w,l}
- * For read{b,w,l} and write{b,w,l} there are also __raw versions, which
- * do not have a memory barrier after them.
*
- * In addition, we have
- * ctrl_in{b,w,l}/ctrl_out{b,w,l} for SuperH specific I/O.
- * which are processor specific.
- */
-
-/*
- * We follow the Alpha convention here:
- * __inb expands to an inline function call (which calls via the mv)
- * _inb is a real function call (note ___raw fns are _ version of __raw)
- * inb by default expands to _inb, but the machine specific code may
- * define it to __inb if it chooses.
+ * While read{b,w,l,q} and write{b,w,l,q} contain memory barriers
+ * automatically, there are also __raw versions, which do not.
*/
+#include <linux/errno.h>
#include <asm/cache.h>
-#include <asm/system.h>
#include <asm/addrspace.h>
#include <asm/machvec.h>
#include <asm/pgtable.h>
#include <asm-generic/iomap.h>
#ifdef __KERNEL__
-
-/*
- * Depending on which platform we are running on, we need different
- * I/O functions.
- */
-#define __IO_PREFIX generic
+#define __IO_PREFIX generic
#include <asm/io_generic.h>
#include <asm/io_trapped.h>
+#include <mach/mangle-port.h>
+
+#define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile u8 __force *)(a) = (v))
+#define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile u16 __force *)(a) = (v))
+#define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile u32 __force *)(a) = (v))
+#define __raw_writeq(v,a) (__chk_io_ptr(a), *(volatile u64 __force *)(a) = (v))
+
+#define __raw_readb(a) (__chk_io_ptr(a), *(volatile u8 __force *)(a))
+#define __raw_readw(a) (__chk_io_ptr(a), *(volatile u16 __force *)(a))
+#define __raw_readl(a) (__chk_io_ptr(a), *(volatile u32 __force *)(a))
+#define __raw_readq(a) (__chk_io_ptr(a), *(volatile u64 __force *)(a))
+
+#define readb_relaxed(c) ({ u8 __v = ioswabb(__raw_readb(c)); __v; })
+#define readw_relaxed(c) ({ u16 __v = ioswabw(__raw_readw(c)); __v; })
+#define readl_relaxed(c) ({ u32 __v = ioswabl(__raw_readl(c)); __v; })
+#define readq_relaxed(c) ({ u64 __v = ioswabq(__raw_readq(c)); __v; })
+
+#define writeb_relaxed(v,c) ((void)__raw_writeb((__force u8)ioswabb(v),c))
+#define writew_relaxed(v,c) ((void)__raw_writew((__force u16)ioswabw(v),c))
+#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)ioswabl(v),c))
+#define writeq_relaxed(v,c) ((void)__raw_writeq((__force u64)ioswabq(v),c))
+
+#define readb(a) ({ u8 r_ = readb_relaxed(a); rmb(); r_; })
+#define readw(a) ({ u16 r_ = readw_relaxed(a); rmb(); r_; })
+#define readl(a) ({ u32 r_ = readl_relaxed(a); rmb(); r_; })
+#define readq(a) ({ u64 r_ = readq_relaxed(a); rmb(); r_; })
+
+#define writeb(v,a) ({ wmb(); writeb_relaxed((v),(a)); })
+#define writew(v,a) ({ wmb(); writew_relaxed((v),(a)); })
+#define writel(v,a) ({ wmb(); writel_relaxed((v),(a)); })
+#define writeq(v,a) ({ wmb(); writeq_relaxed((v),(a)); })
+
+#define readsb(p,d,l) __raw_readsb(p,d,l)
+#define readsw(p,d,l) __raw_readsw(p,d,l)
+#define readsl(p,d,l) __raw_readsl(p,d,l)
+
+#define writesb(p,d,l) __raw_writesb(p,d,l)
+#define writesw(p,d,l) __raw_writesw(p,d,l)
+#define writesl(p,d,l) __raw_writesl(p,d,l)
+
+#define __BUILD_UNCACHED_IO(bwlq, type) \
+static inline type read##bwlq##_uncached(unsigned long addr) \
+{ \
+ type ret; \
+ jump_to_uncached(); \
+ ret = __raw_read##bwlq(addr); \
+ back_to_cached(); \
+ return ret; \
+} \
+ \
+static inline void write##bwlq##_uncached(type v, unsigned long addr) \
+{ \
+ jump_to_uncached(); \
+ __raw_write##bwlq(v, addr); \
+ back_to_cached(); \
+}
-#define maybebadio(port) \
- printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \
- __FUNCTION__, __LINE__, (port), (u32)__builtin_return_address(0))
-
-/*
- * Since boards are able to define their own set of I/O routines through
- * their respective machine vector, we always wrap through the mv.
- *
- * Also, in the event that a board hasn't provided its own definition for
- * a given routine, it will be wrapped to generic code at run-time.
- */
-
-#define __inb(p) sh_mv.mv_inb((p))
-#define __inw(p) sh_mv.mv_inw((p))
-#define __inl(p) sh_mv.mv_inl((p))
-#define __outb(x,p) sh_mv.mv_outb((x),(p))
-#define __outw(x,p) sh_mv.mv_outw((x),(p))
-#define __outl(x,p) sh_mv.mv_outl((x),(p))
-
-#define __inb_p(p) sh_mv.mv_inb_p((p))
-#define __inw_p(p) sh_mv.mv_inw_p((p))
-#define __inl_p(p) sh_mv.mv_inl_p((p))
-#define __outb_p(x,p) sh_mv.mv_outb_p((x),(p))
-#define __outw_p(x,p) sh_mv.mv_outw_p((x),(p))
-#define __outl_p(x,p) sh_mv.mv_outl_p((x),(p))
-
-#define __insb(p,b,c) sh_mv.mv_insb((p), (b), (c))
-#define __insw(p,b,c) sh_mv.mv_insw((p), (b), (c))
-#define __insl(p,b,c) sh_mv.mv_insl((p), (b), (c))
-#define __outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c))
-#define __outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c))
-#define __outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c))
-
-#define __readb(a) sh_mv.mv_readb((a))
-#define __readw(a) sh_mv.mv_readw((a))
-#define __readl(a) sh_mv.mv_readl((a))
-#define __writeb(v,a) sh_mv.mv_writeb((v),(a))
-#define __writew(v,a) sh_mv.mv_writew((v),(a))
-#define __writel(v,a) sh_mv.mv_writel((v),(a))
-
-#define inb __inb
-#define inw __inw
-#define inl __inl
-#define outb __outb
-#define outw __outw
-#define outl __outl
-
-#define inb_p __inb_p
-#define inw_p __inw_p
-#define inl_p __inl_p
-#define outb_p __outb_p
-#define outw_p __outw_p
-#define outl_p __outl_p
-
-#define insb __insb
-#define insw __insw
-#define insl __insl
-#define outsb __outsb
-#define outsw __outsw
-#define outsl __outsl
-
-#define __raw_readb(a) __readb((void __iomem *)(a))
-#define __raw_readw(a) __readw((void __iomem *)(a))
-#define __raw_readl(a) __readl((void __iomem *)(a))
-#define __raw_writeb(v, a) __writeb(v, (void __iomem *)(a))
-#define __raw_writew(v, a) __writew(v, (void __iomem *)(a))
-#define __raw_writel(v, a) __writel(v, (void __iomem *)(a))
-
-void __raw_writesl(unsigned long addr, const void *data, int longlen);
-void __raw_readsl(unsigned long addr, void *data, int longlen);
-
-/*
- * The platform header files may define some of these macros to use
- * the inlined versions where appropriate. These macros may also be
- * redefined by userlevel programs.
- */
-#ifdef __readb
-# define readb(a) ({ unsigned int r_ = __raw_readb(a); mb(); r_; })
-#endif
-#ifdef __raw_readw
-# define readw(a) ({ unsigned int r_ = __raw_readw(a); mb(); r_; })
-#endif
-#ifdef __raw_readl
-# define readl(a) ({ unsigned int r_ = __raw_readl(a); mb(); r_; })
-#endif
-
-#ifdef __raw_writeb
-# define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); })
-#endif
-#ifdef __raw_writew
-# define writew(v,a) ({ __raw_writew((v),(a)); mb(); })
-#endif
-#ifdef __raw_writel
-# define writel(v,a) ({ __raw_writel((v),(a)); mb(); })
-#endif
+__BUILD_UNCACHED_IO(b, u8)
+__BUILD_UNCACHED_IO(w, u16)
+__BUILD_UNCACHED_IO(l, u32)
+__BUILD_UNCACHED_IO(q, u64)
-#define __BUILD_MEMORY_STRING(bwlq, type) \
+#define __BUILD_MEMORY_STRING(pfx, bwlq, type) \
\
-static inline void writes##bwlq(volatile void __iomem *mem, \
- const void *addr, unsigned int count) \
+static inline void \
+pfx##writes##bwlq(volatile void __iomem *mem, const void *addr, \
+ unsigned int count) \
{ \
const volatile type *__addr = addr; \
\
@@ -149,8 +99,8 @@ static inline void writes##bwlq(volatile void __iomem *mem, \
} \
} \
\
-static inline void reads##bwlq(volatile void __iomem *mem, void *addr, \
- unsigned int count) \
+static inline void pfx##reads##bwlq(volatile void __iomem *mem, \
+ void *addr, unsigned int count) \
{ \
volatile type *__addr = addr; \
\
@@ -160,108 +110,130 @@ static inline void reads##bwlq(volatile void __iomem *mem, void *addr, \
} \
}
-__BUILD_MEMORY_STRING(b, u8)
-__BUILD_MEMORY_STRING(w, u16)
-#define writesl __raw_writesl
-#define readsl __raw_readsl
+__BUILD_MEMORY_STRING(__raw_, b, u8)
+__BUILD_MEMORY_STRING(__raw_, w, u16)
-#define readb_relaxed(a) readb(a)
-#define readw_relaxed(a) readw(a)
-#define readl_relaxed(a) readl(a)
-
-/* Simple MMIO */
-#define ioread8(a) readb(a)
-#define ioread16(a) readw(a)
-#define ioread16be(a) be16_to_cpu(__raw_readw((a)))
-#define ioread32(a) readl(a)
-#define ioread32be(a) be32_to_cpu(__raw_readl((a)))
-
-#define iowrite8(v,a) writeb((v),(a))
-#define iowrite16(v,a) writew((v),(a))
-#define iowrite16be(v,a) __raw_writew(cpu_to_be16((v)),(a))
-#define iowrite32(v,a) writel((v),(a))
-#define iowrite32be(v,a) __raw_writel(cpu_to_be32((v)),(a))
-
-#define ioread8_rep(a, d, c) readsb((a), (d), (c))
-#define ioread16_rep(a, d, c) readsw((a), (d), (c))
-#define ioread32_rep(a, d, c) readsl((a), (d), (c))
+#ifdef CONFIG_SUPERH32
+void __raw_writesl(void __iomem *addr, const void *data, int longlen);
+void __raw_readsl(const void __iomem *addr, void *data, int longlen);
+#else
+__BUILD_MEMORY_STRING(__raw_, l, u32)
+#endif
-#define iowrite8_rep(a, s, c) writesb((a), (s), (c))
-#define iowrite16_rep(a, s, c) writesw((a), (s), (c))
-#define iowrite32_rep(a, s, c) writesl((a), (s), (c))
+__BUILD_MEMORY_STRING(__raw_, q, u64)
-#define mmiowb() wmb() /* synco on SH-4A, otherwise a nop */
+#ifdef CONFIG_HAS_IOPORT_MAP
-#define IO_SPACE_LIMIT 0xffffffff
+/*
+ * Slowdown I/O port space accesses for antique hardware.
+ */
+#undef CONF_SLOWDOWN_IO
/*
- * This function provides a method for the generic case where a board-specific
- * ioport_map simply needs to return the port + some arbitrary port base.
- *
- * We use this at board setup time to implicitly set the port base, and
- * as a result, we can use the generic ioport_map.
+ * On SuperH I/O ports are memory mapped, so we access them using normal
+ * load/store instructions. sh_io_port_base is the virtual address to
+ * which all ports are being mapped.
*/
+extern unsigned long sh_io_port_base;
+
static inline void __set_io_port_base(unsigned long pbase)
{
- extern unsigned long generic_io_base;
-
- generic_io_base = pbase;
+ *(unsigned long *)&sh_io_port_base = pbase;
+ barrier();
}
-#define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n))
+#ifdef CONFIG_GENERIC_IOMAP
+#define __ioport_map ioport_map
+#else
+extern void __iomem *__ioport_map(unsigned long addr, unsigned int size);
+#endif
-/* We really want to try and get these to memcpy etc */
-extern void memcpy_fromio(void *, volatile void __iomem *, unsigned long);
-extern void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
-extern void memset_io(volatile void __iomem *, int, unsigned long);
+#ifdef CONF_SLOWDOWN_IO
+#define SLOW_DOWN_IO __raw_readw(sh_io_port_base)
+#else
+#define SLOW_DOWN_IO
+#endif
-/* SuperH on-chip I/O functions */
-static inline unsigned char ctrl_inb(unsigned long addr)
-{
- return *(volatile unsigned char*)addr;
+#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p, slow) \
+ \
+static inline void pfx##out##bwlq##p(type val, unsigned long port) \
+{ \
+ volatile type *__addr; \
+ \
+ __addr = __ioport_map(port, sizeof(type)); \
+ *__addr = val; \
+ slow; \
+} \
+ \
+static inline type pfx##in##bwlq##p(unsigned long port) \
+{ \
+ volatile type *__addr; \
+ type __val; \
+ \
+ __addr = __ioport_map(port, sizeof(type)); \
+ __val = *__addr; \
+ slow; \
+ \
+ return __val; \
}
-static inline unsigned short ctrl_inw(unsigned long addr)
-{
- return *(volatile unsigned short*)addr;
-}
+#define __BUILD_IOPORT_PFX(bus, bwlq, type) \
+ __BUILD_IOPORT_SINGLE(bus, bwlq, type, ,) \
+ __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
-static inline unsigned int ctrl_inl(unsigned long addr)
-{
- return *(volatile unsigned long*)addr;
-}
+#define BUILDIO_IOPORT(bwlq, type) \
+ __BUILD_IOPORT_PFX(, bwlq, type)
-static inline unsigned long long ctrl_inq(unsigned long addr)
-{
- return *(volatile unsigned long long*)addr;
-}
+BUILDIO_IOPORT(b, u8)
+BUILDIO_IOPORT(w, u16)
+BUILDIO_IOPORT(l, u32)
+BUILDIO_IOPORT(q, u64)
-static inline void ctrl_outb(unsigned char b, unsigned long addr)
-{
- *(volatile unsigned char*)addr = b;
+#define __BUILD_IOPORT_STRING(bwlq, type) \
+ \
+static inline void outs##bwlq(unsigned long port, const void *addr, \
+ unsigned int count) \
+{ \
+ const volatile type *__addr = addr; \
+ \
+ while (count--) { \
+ out##bwlq(*__addr, port); \
+ __addr++; \
+ } \
+} \
+ \
+static inline void ins##bwlq(unsigned long port, void *addr, \
+ unsigned int count) \
+{ \
+ volatile type *__addr = addr; \
+ \
+ while (count--) { \
+ *__addr = in##bwlq(port); \
+ __addr++; \
+ } \
}
-static inline void ctrl_outw(unsigned short b, unsigned long addr)
-{
- *(volatile unsigned short*)addr = b;
-}
+__BUILD_IOPORT_STRING(b, u8)
+__BUILD_IOPORT_STRING(w, u16)
+__BUILD_IOPORT_STRING(l, u32)
+__BUILD_IOPORT_STRING(q, u64)
-static inline void ctrl_outl(unsigned int b, unsigned long addr)
-{
- *(volatile unsigned long*)addr = b;
-}
+#else /* !CONFIG_HAS_IOPORT_MAP */
-static inline void ctrl_outq(unsigned long long b, unsigned long addr)
-{
- *(volatile unsigned long long*)addr = b;
-}
+#include <asm/io_noioport.h>
-static inline void ctrl_delay(void)
-{
-#ifdef P2SEG
- ctrl_inw(P2SEG);
#endif
-}
+
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/* synco on SH-4A, otherwise a nop */
+#define mmiowb() wmb()
+
+/* We really want to try and get these to memcpy etc */
+void memcpy_fromio(void *, const volatile void __iomem *, unsigned long);
+void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
+void memset_io(volatile void __iomem *, int, unsigned long);
/* Quad-word real-mode I/O, don't ask.. */
unsigned long long peek_real_address_q(unsigned long long addr);
@@ -294,34 +266,22 @@ unsigned long long poke_real_address_q(unsigned long long addr,
* doesn't exist, so everything must go through page tables.
*/
#ifdef CONFIG_MMU
-void __iomem *__ioremap(unsigned long offset, unsigned long size,
- unsigned long flags);
+void __iomem *__ioremap_caller(phys_addr_t offset, unsigned long size,
+ pgprot_t prot, void *caller);
void __iounmap(void __iomem *addr);
-/* arch/sh/mm/ioremap_64.c */
-unsigned long onchip_remap(unsigned long addr, unsigned long size,
- const char *name);
-extern void onchip_unmap(unsigned long vaddr);
-#else
-#define __ioremap(offset, size, flags) ((void __iomem *)(offset))
-#define __iounmap(addr) do { } while (0)
-#define onchip_remap(addr, size, name) (addr)
-#define onchip_unmap(addr) do { } while (0)
-#endif /* CONFIG_MMU */
-
static inline void __iomem *
-__ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
+__ioremap(phys_addr_t offset, unsigned long size, pgprot_t prot)
{
-#ifdef CONFIG_SUPERH32
- unsigned long last_addr = offset + size - 1;
-#endif
- void __iomem *ret;
+ return __ioremap_caller(offset, size, prot, __builtin_return_address(0));
+}
- ret = __ioremap_trapped(offset, size);
- if (ret)
- return ret;
+static inline void __iomem *
+__ioremap_29bit(phys_addr_t offset, unsigned long size, pgprot_t prot)
+{
+#ifdef CONFIG_29BIT
+ phys_addr_t last_addr = offset + size - 1;
-#ifdef CONFIG_SUPERH32
/*
* For P1 and P2 space this is trivial, as everything is already
* mapped. Uncached access for P1 addresses are done through P2.
@@ -329,26 +289,86 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
* mapping must be done by the PMB or by using page tables.
*/
if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) {
+ u64 flags = pgprot_val(prot);
+
+ /*
+ * Anything using the legacy PTEA space attributes needs
+ * to be kicked down to page table mappings.
+ */
+ if (unlikely(flags & _PAGE_PCC_MASK))
+ return NULL;
if (unlikely(flags & _PAGE_CACHABLE))
return (void __iomem *)P1SEGADDR(offset);
return (void __iomem *)P2SEGADDR(offset);
}
+
+ /* P4 above the store queues are always mapped. */
+ if (unlikely(offset >= P3_ADDR_MAX))
+ return (void __iomem *)P4SEGADDR(offset);
#endif
- return __ioremap(offset, size, flags);
+ return NULL;
}
-#define ioremap(offset, size) \
- __ioremap_mode((offset), (size), 0)
-#define ioremap_nocache(offset, size) \
- __ioremap_mode((offset), (size), 0)
-#define ioremap_cache(offset, size) \
- __ioremap_mode((offset), (size), _PAGE_CACHABLE)
-#define p3_ioremap(offset, size, flags) \
- __ioremap((offset), (size), (flags))
-#define iounmap(addr) \
- __iounmap((addr))
+static inline void __iomem *
+__ioremap_mode(phys_addr_t offset, unsigned long size, pgprot_t prot)
+{
+ void __iomem *ret;
+
+ ret = __ioremap_trapped(offset, size);
+ if (ret)
+ return ret;
+
+ ret = __ioremap_29bit(offset, size, prot);
+ if (ret)
+ return ret;
+
+ return __ioremap(offset, size, prot);
+}
+#else
+#define __ioremap(offset, size, prot) ((void __iomem *)(offset))
+#define __ioremap_mode(offset, size, prot) ((void __iomem *)(offset))
+#define __iounmap(addr) do { } while (0)
+#endif /* CONFIG_MMU */
+
+static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
+{
+ return __ioremap_mode(offset, size, PAGE_KERNEL_NOCACHE);
+}
+
+static inline void __iomem *
+ioremap_cache(phys_addr_t offset, unsigned long size)
+{
+ return __ioremap_mode(offset, size, PAGE_KERNEL);
+}
+
+#ifdef CONFIG_HAVE_IOREMAP_PROT
+static inline void __iomem *
+ioremap_prot(phys_addr_t offset, unsigned long size, unsigned long flags)
+{
+ return __ioremap_mode(offset, size, __pgprot(flags));
+}
+#endif
+
+#ifdef CONFIG_IOREMAP_FIXED
+extern void __iomem *ioremap_fixed(phys_addr_t, unsigned long, pgprot_t);
+extern int iounmap_fixed(void __iomem *);
+extern void ioremap_fixed_init(void);
+#else
+static inline void __iomem *
+ioremap_fixed(phys_addr_t phys_addr, unsigned long size, pgprot_t prot)
+{
+ BUG();
+ return NULL;
+}
+
+static inline void ioremap_fixed_init(void) { }
+static inline int iounmap_fixed(void __iomem *addr) { return -EINVAL; }
+#endif
+
+#define ioremap_nocache ioremap
+#define iounmap __iounmap
/*
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
@@ -361,6 +381,10 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
*/
#define xlate_dev_kmem_ptr(p) p
+#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
+int valid_phys_addr_range(phys_addr_t addr, size_t size);
+int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
+
#endif /* __KERNEL__ */
#endif /* __ASM_SH_IO_H */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 18:48:31 +0000