diff options
Diffstat (limited to 'include/asm-sh/io.h')
| -rw-r--r-- | include/asm-sh/io.h | 283 |
1 files changed, 166 insertions, 117 deletions
diff --git a/include/asm-sh/io.h b/include/asm-sh/io.h index 6bc343fee7a0..b0b2937b6f83 100644 --- a/include/asm-sh/io.h +++ b/include/asm-sh/io.h @@ -11,7 +11,7 @@ * 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 + * In addition, we have * ctrl_in{b,w,l}/ctrl_out{b,w,l} for SuperH specific I/O. * which are processor specific. */ @@ -23,19 +23,27 @@ * inb by default expands to _inb, but the machine specific code may * define it to __inb if it chooses. */ - +#include <linux/config.h> #include <asm/cache.h> #include <asm/system.h> #include <asm/addrspace.h> #include <asm/machvec.h> -#include <linux/config.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 +#include <asm/io_generic.h> + +#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)) -#ifdef __KERNEL__ /* * Since boards are able to define their own set of I/O routines through * their respective machine vector, we always wrap through the mv. @@ -44,113 +52,120 @@ * 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 __ioremap(a,s) sh_mv.mv_ioremap((a), (s)) -# define __iounmap(a) sh_mv.mv_iounmap((a)) - -# define __isa_port2addr(a) sh_mv.mv_isa_port2addr(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 __readb -# define __raw_readw __readw -# define __raw_readl __readl -# define __raw_writeb __writeb -# define __raw_writew __writew -# define __raw_writel __writel +#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)) /* * 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 __raw_readb -# define readb(a) ({ unsigned long r_ = __raw_readb((unsigned long)a); mb(); r_; }) +#ifdef __readb +# define readb(a) ({ unsigned long r_ = __raw_readb(a); mb(); r_; }) #endif #ifdef __raw_readw -# define readw(a) ({ unsigned long r_ = __raw_readw((unsigned long)a); mb(); r_; }) +# define readw(a) ({ unsigned long r_ = __raw_readw(a); mb(); r_; }) #endif #ifdef __raw_readl -# define readl(a) ({ unsigned long r_ = __raw_readl((unsigned long)a); mb(); r_; }) +# define readl(a) ({ unsigned long r_ = __raw_readl(a); mb(); r_; }) #endif #ifdef __raw_writeb -# define writeb(v,a) ({ __raw_writeb((v),(unsigned long)(a)); mb(); }) +# define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); }) #endif #ifdef __raw_writew -# define writew(v,a) ({ __raw_writew((v),(unsigned long)(a)); mb(); }) +# define writew(v,a) ({ __raw_writew((v),(a)); mb(); }) #endif #ifdef __raw_writel -# define writel(v,a) ({ __raw_writel((v),(unsigned long)(a)); mb(); }) +# define writel(v,a) ({ __raw_writel((v),(a)); mb(); }) #endif #define readb_relaxed(a) readb(a) #define readw_relaxed(a) readw(a) #define readl_relaxed(a) readl(a) -#define mmiowb() +/* 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))) -/* - * If the platform has PC-like I/O, this function converts the offset into - * an address. - */ -static __inline__ unsigned long isa_port2addr(unsigned long offset) -{ - return __isa_port2addr(offset); -} +#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) insb((a),(d),(c)) +#define ioread16_rep(a,d,c) insw((a),(d),(c)) +#define ioread32_rep(a,d,c) insl((a),(d),(c)) + +#define iowrite8_rep(a,s,c) outsb((a),(s),(c)) +#define iowrite16_rep(a,s,c) outsw((a),(s),(c)) +#define iowrite32_rep(a,s,c) outsl((a),(s),(c)) + +#define mmiowb() wmb() /* synco on SH-4A, otherwise a nop */ /* * This function provides a method for the generic case where a board-specific - * isa_port2addr simply needs to return the port + some arbitrary port base. + * 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 isa_port2addr. + * as a result, we can use the generic ioport_map. */ static inline void __set_io_port_base(unsigned long pbase) { @@ -159,51 +174,52 @@ static inline void __set_io_port_base(unsigned long pbase) generic_io_base = pbase; } -#define isa_readb(a) readb(isa_port2addr(a)) -#define isa_readw(a) readw(isa_port2addr(a)) -#define isa_readl(a) readl(isa_port2addr(a)) -#define isa_writeb(b,a) writeb(b,isa_port2addr(a)) -#define isa_writew(w,a) writew(w,isa_port2addr(a)) -#define isa_writel(l,a) writel(l,isa_port2addr(a)) +#define isa_readb(a) readb(ioport_map(a, 1)) +#define isa_readw(a) readw(ioport_map(a, 2)) +#define isa_readl(a) readl(ioport_map(a, 4)) +#define isa_writeb(b,a) writeb(b,ioport_map(a, 1)) +#define isa_writew(w,a) writew(w,ioport_map(a, 2)) +#define isa_writel(l,a) writel(l,ioport_map(a, 4)) + #define isa_memset_io(a,b,c) \ - memset((void *)(isa_port2addr((unsigned long)a)),(b),(c)) + memset((void *)(ioport_map((unsigned long)(a), 1)),(b),(c)) #define isa_memcpy_fromio(a,b,c) \ - memcpy((a),(void *)(isa_port2addr((unsigned long)(b))),(c)) + memcpy((a),(void *)(ioport_map((unsigned long)(b), 1)),(c)) #define isa_memcpy_toio(a,b,c) \ - memcpy((void *)(isa_port2addr((unsigned long)(a))),(b),(c)) + memcpy((void *)(ioport_map((unsigned long)(a), 1)),(b),(c)) /* We really want to try and get these to memcpy etc */ -extern void memcpy_fromio(void *, unsigned long, unsigned long); -extern void memcpy_toio(unsigned long, const void *, unsigned long); -extern void memset_io(unsigned long, int, unsigned long); +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); /* SuperH on-chip I/O functions */ -static __inline__ unsigned char ctrl_inb(unsigned long addr) +static inline unsigned char ctrl_inb(unsigned long addr) { return *(volatile unsigned char*)addr; } -static __inline__ unsigned short ctrl_inw(unsigned long addr) +static inline unsigned short ctrl_inw(unsigned long addr) { return *(volatile unsigned short*)addr; } -static __inline__ unsigned int ctrl_inl(unsigned long addr) +static inline unsigned int ctrl_inl(unsigned long addr) { return *(volatile unsigned long*)addr; } -static __inline__ void ctrl_outb(unsigned char b, unsigned long addr) +static inline void ctrl_outb(unsigned char b, unsigned long addr) { *(volatile unsigned char*)addr = b; } -static __inline__ void ctrl_outw(unsigned short b, unsigned long addr) +static inline void ctrl_outw(unsigned short b, unsigned long addr) { *(volatile unsigned short*)addr = b; } -static __inline__ void ctrl_outl(unsigned int b, unsigned long addr) +static inline void ctrl_outl(unsigned int b, unsigned long addr) { *(volatile unsigned long*)addr = b; } @@ -214,12 +230,12 @@ static __inline__ void ctrl_outl(unsigned int b, unsigned long addr) * Change virtual addresses to physical addresses and vv. * These are trivial on the 1:1 Linux/SuperH mapping */ -static __inline__ unsigned long virt_to_phys(volatile void * address) +static inline unsigned long virt_to_phys(volatile void *address) { return PHYSADDR(address); } -static __inline__ void * phys_to_virt(unsigned long address) +static inline void *phys_to_virt(unsigned long address) { return (void *)P1SEGADDR(address); } @@ -234,27 +250,60 @@ static __inline__ void * phys_to_virt(unsigned long address) * differently. On the x86 architecture, we just read/write the * memory location directly. * - * On SH, we have the whole physical address space mapped at all times - * (as MIPS does), so "ioremap()" and "iounmap()" do not need to do - * anything. (This isn't true for all machines but we still handle - * these cases with wired TLB entries anyway ...) + * On SH, we traditionally have the whole physical address space mapped + * at all times (as MIPS does), so "ioremap()" and "iounmap()" do not + * need to do anything but place the address in the proper segment. This + * is true for P1 and P2 addresses, as well as some P3 ones. However, + * most of the P3 addresses and newer cores using extended addressing + * need to map through page tables, so the ioremap() implementation + * becomes a bit more complicated. See arch/sh/mm/ioremap.c for + * additional notes on this. * * We cheat a bit and always return uncachable areas until we've fixed - * the drivers to handle caching properly. + * the drivers to handle caching properly. */ -static __inline__ void * ioremap(unsigned long offset, unsigned long size) +#ifdef CONFIG_MMU +void __iomem *__ioremap(unsigned long offset, unsigned long size, + unsigned long flags); +void __iounmap(void __iomem *addr); +#else +#define __ioremap(offset, size, flags) ((void __iomem *)(offset)) +#define __iounmap(addr) do { } while (0) +#endif /* CONFIG_MMU */ + +static inline void __iomem * +__ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags) { - return __ioremap(offset, size); + unsigned long last_addr = offset + size - 1; + + /* + * For P1 and P2 space this is trivial, as everything is already + * mapped. Uncached access for P1 addresses are done through P2. + * In the P3 case or for addresses outside of the 29-bit space, + * mapping must be done by the PMB or by using page tables. + */ + if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) { + if (unlikely(flags & _PAGE_CACHABLE)) + return (void __iomem *)P1SEGADDR(offset); + + return (void __iomem *)P2SEGADDR(offset); + } + + return __ioremap(offset, size, flags); } -static __inline__ void iounmap(void *addr) -{ - return __iounmap(addr); -} - -#define ioremap_nocache(off,size) ioremap(off,size) - -static __inline__ int check_signature(unsigned long io_addr, +#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 int check_signature(char __iomem *io_addr, const unsigned char *signature, int length) { int retval = 0; |