diff options
Diffstat (limited to 'arch/sh/include/asm/io.h')
| -rw-r--r-- | arch/sh/include/asm/io.h | 257 |
1 files changed, 96 insertions, 161 deletions
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h index d9e794e..436c285 100644 --- a/arch/sh/include/asm/io.h +++ b/arch/sh/include/asm/io.h @@ -1,27 +1,26 @@ #ifndef __ASM_SH_IO_H #define __ASM_SH_IO_H - /* * 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. + * + * Historically, we have also had ctrl_in{b,w,l,q}/ctrl_out{b,w,l,q} for + * SuperH specific I/O (raw I/O to on-chip CPU peripherals). In practice + * these have the same semantics as the __raw variants, and as such, all + * new code should be using the __raw versions. + * + * All ISA I/O routines are wrapped through the machine vector. If a + * board does not provide overrides, a generic set that are copied in + * from the default machine vector are used instead. These are largely + * for old compat code for I/O offseting to SuperIOs, all of which are + * better handled through the machvec ioport mapping routines these days. */ #include <asm/cache.h> #include <asm/system.h> @@ -31,7 +30,6 @@ #include <asm-generic/iomap.h> #ifdef __KERNEL__ - /* * Depending on which platform we are running on, we need different * I/O functions. @@ -40,90 +38,64 @@ #include <asm/io_generic.h> #include <asm/io_trapped.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)) +#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 __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(a) ({ u8 r_ = __raw_readb(a); mb(); r_; }) +#define readw(a) ({ u16 r_ = __raw_readw(a); mb(); r_; }) +#define readl(a) ({ u32 r_ = __raw_readl(a); mb(); r_; }) +#define readq(a) ({ u64 r_ = __raw_readq(a); mb(); r_; }) + +#define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); }) +#define writew(v,a) ({ __raw_writew((v),(a)); mb(); }) +#define writel(v,a) ({ __raw_writel((v),(a)); mb(); }) +#define writeq(v,a) ({ __raw_writeq((v),(a)); mb(); }) -/* - * 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_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v)) -#define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v)) -#define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v)) - -#define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a)) -#define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a)) -#define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a)) - -void __raw_writesl(void __iomem *addr, const void *data, int longlen); -void __raw_readsl(const void __iomem *addr, void *data, int longlen); +/* SuperH on-chip I/O functions */ +#define ctrl_inb __raw_readb +#define ctrl_inw __raw_readw +#define ctrl_inl __raw_readl +#define ctrl_inq __raw_readq -/* - * 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. - */ -#define readb(a) ({ unsigned int r_ = __readb(a); mb(); r_; }) -#define readw(a) ({ unsigned int r_ = __readw(a); mb(); r_; }) -#define readl(a) ({ unsigned int r_ = __readl(a); mb(); r_; }) +#define ctrl_outb __raw_writeb +#define ctrl_outw __raw_writew +#define ctrl_outl __raw_writel +#define ctrl_outq __raw_writeq -#define writeb(v,a) ({ __writeb((v),(a)); mb(); }) -#define writew(v,a) ({ __writew((v),(a)); mb(); }) -#define writel(v,a) ({ __writel((v),(a)); mb(); }) +static inline void ctrl_delay(void) +{ +#ifdef P2SEG + __raw_readw(P2SEG); +#endif +} #define __BUILD_MEMORY_STRING(bwlq, type) \ \ @@ -151,18 +123,23 @@ static inline void __raw_reads##bwlq(volatile void __iomem *mem, \ __BUILD_MEMORY_STRING(b, u8) __BUILD_MEMORY_STRING(w, u16) +__BUILD_MEMORY_STRING(q, u64) + +void __raw_writesl(void __iomem *addr, const void *data, int longlen); +void __raw_readsl(const void __iomem *addr, void *data, int longlen); -#define writesb __raw_writesb -#define writesw __raw_writesw -#define writesl __raw_writesl +#define writesb __raw_writesb +#define writesw __raw_writesw +#define writesl __raw_writesl -#define readsb __raw_readsb -#define readsw __raw_readsw -#define readsl __raw_readsl +#define readsb __raw_readsb +#define readsw __raw_readsw +#define readsl __raw_readsl -#define readb_relaxed(a) readb(a) -#define readw_relaxed(a) readw(a) -#define readl_relaxed(a) readl(a) +#define readb_relaxed(a) readb(a) +#define readw_relaxed(a) readw(a) +#define readl_relaxed(a) readl(a) +#define readq_relaxed(a) readq(a) /* Simple MMIO */ #define ioread8(a) __raw_readb(a) @@ -185,15 +162,17 @@ __BUILD_MEMORY_STRING(w, u16) #define iowrite16_rep(a, s, c) __raw_writesw((a), (s), (c)) #define iowrite32_rep(a, s, c) __raw_writesl((a), (s), (c)) -#define mmiowb() wmb() /* synco on SH-4A, otherwise a nop */ +/* synco on SH-4A, otherwise a nop */ +#define mmiowb() wmb() #define IO_SPACE_LIMIT 0xffffffff extern unsigned long generic_io_base; /* - * 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. + * 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. @@ -206,57 +185,9 @@ static inline void __set_io_port_base(unsigned long pbase) #define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n)) /* 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); - -/* SuperH on-chip I/O functions */ -static inline unsigned char ctrl_inb(unsigned long addr) -{ - return *(volatile unsigned char*)addr; -} - -static inline unsigned short ctrl_inw(unsigned long addr) -{ - return *(volatile unsigned short*)addr; -} - -static inline unsigned int ctrl_inl(unsigned long addr) -{ - return *(volatile unsigned long*)addr; -} - -static inline unsigned long long ctrl_inq(unsigned long addr) -{ - return *(volatile unsigned long 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) -{ - *(volatile unsigned short*)addr = b; -} - -static inline void ctrl_outl(unsigned int b, unsigned long addr) -{ - *(volatile unsigned long*)addr = b; -} - -static inline void ctrl_outq(unsigned long long b, unsigned long addr) -{ - *(volatile unsigned long long*)addr = b; -} - -static inline void ctrl_delay(void) -{ -#ifdef P2SEG - ctrl_inw(P2SEG); -#endif -} +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); @@ -347,6 +278,10 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags) #define iounmap(addr) \ __iounmap((addr)) +#define maybebadio(port) \ + printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \ + __func__, __LINE__, (port), (u32)__builtin_return_address(0)) + /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access |
