mirror of https://gitee.com/openkylin/linux.git
305 lines
9.9 KiB
C
305 lines
9.9 KiB
C
#ifndef __ASM_SH_IO_H
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#define __ASM_SH_IO_H
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/*
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* Convention:
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* read{b,w,l,q}/write{b,w,l,q} are for PCI,
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* while in{b,w,l}/out{b,w,l} are for ISA
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*
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* In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p
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* and 'string' versions: ins{b,w,l}/outs{b,w,l}
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*
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* While read{b,w,l,q} and write{b,w,l,q} contain memory barriers
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* automatically, there are also __raw versions, which do not.
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*
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* Historically, we have also had ctrl_in{b,w,l,q}/ctrl_out{b,w,l,q} for
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* SuperH specific I/O (raw I/O to on-chip CPU peripherals). In practice
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* these have the same semantics as the __raw variants, and as such, all
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* new code should be using the __raw versions.
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*
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* All ISA I/O routines are wrapped through the machine vector. If a
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* board does not provide overrides, a generic set that are copied in
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* from the default machine vector are used instead. These are largely
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* for old compat code for I/O offseting to SuperIOs, all of which are
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* better handled through the machvec ioport mapping routines these days.
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*/
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#include <asm/cache.h>
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#include <asm/system.h>
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#include <asm/addrspace.h>
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#include <asm/machvec.h>
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#include <asm/pgtable.h>
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#include <asm-generic/iomap.h>
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#ifdef __KERNEL__
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/*
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* Depending on which platform we are running on, we need different
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* I/O functions.
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*/
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#define __IO_PREFIX generic
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#include <asm/io_generic.h>
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#include <asm/io_trapped.h>
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#define inb(p) sh_mv.mv_inb((p))
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#define inw(p) sh_mv.mv_inw((p))
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#define inl(p) sh_mv.mv_inl((p))
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#define outb(x,p) sh_mv.mv_outb((x),(p))
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#define outw(x,p) sh_mv.mv_outw((x),(p))
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#define outl(x,p) sh_mv.mv_outl((x),(p))
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#define inb_p(p) sh_mv.mv_inb_p((p))
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#define inw_p(p) sh_mv.mv_inw_p((p))
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#define inl_p(p) sh_mv.mv_inl_p((p))
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#define outb_p(x,p) sh_mv.mv_outb_p((x),(p))
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#define outw_p(x,p) sh_mv.mv_outw_p((x),(p))
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#define outl_p(x,p) sh_mv.mv_outl_p((x),(p))
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#define insb(p,b,c) sh_mv.mv_insb((p), (b), (c))
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#define insw(p,b,c) sh_mv.mv_insw((p), (b), (c))
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#define insl(p,b,c) sh_mv.mv_insl((p), (b), (c))
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#define outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c))
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#define outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c))
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#define outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c))
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#define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile u8 __force *)(a) = (v))
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#define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile u16 __force *)(a) = (v))
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#define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile u32 __force *)(a) = (v))
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#define __raw_writeq(v,a) (__chk_io_ptr(a), *(volatile u64 __force *)(a) = (v))
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#define __raw_readb(a) (__chk_io_ptr(a), *(volatile u8 __force *)(a))
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#define __raw_readw(a) (__chk_io_ptr(a), *(volatile u16 __force *)(a))
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#define __raw_readl(a) (__chk_io_ptr(a), *(volatile u32 __force *)(a))
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#define __raw_readq(a) (__chk_io_ptr(a), *(volatile u64 __force *)(a))
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#define readb(a) ({ u8 r_ = __raw_readb(a); mb(); r_; })
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#define readw(a) ({ u16 r_ = __raw_readw(a); mb(); r_; })
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#define readl(a) ({ u32 r_ = __raw_readl(a); mb(); r_; })
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#define readq(a) ({ u64 r_ = __raw_readq(a); mb(); r_; })
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#define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); })
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#define writew(v,a) ({ __raw_writew((v),(a)); mb(); })
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#define writel(v,a) ({ __raw_writel((v),(a)); mb(); })
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#define writeq(v,a) ({ __raw_writeq((v),(a)); mb(); })
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/* SuperH on-chip I/O functions */
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#define ctrl_inb __raw_readb
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#define ctrl_inw __raw_readw
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#define ctrl_inl __raw_readl
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#define ctrl_inq __raw_readq
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#define ctrl_outb __raw_writeb
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#define ctrl_outw __raw_writew
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#define ctrl_outl __raw_writel
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#define ctrl_outq __raw_writeq
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static inline void ctrl_delay(void)
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{
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#ifdef P2SEG
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__raw_readw(P2SEG);
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#endif
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}
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#define __BUILD_MEMORY_STRING(bwlq, type) \
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\
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static inline void __raw_writes##bwlq(volatile void __iomem *mem, \
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const void *addr, unsigned int count) \
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{ \
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const volatile type *__addr = addr; \
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\
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while (count--) { \
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__raw_write##bwlq(*__addr, mem); \
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__addr++; \
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} \
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} \
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\
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static inline void __raw_reads##bwlq(volatile void __iomem *mem, \
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void *addr, unsigned int count) \
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{ \
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volatile type *__addr = addr; \
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\
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while (count--) { \
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*__addr = __raw_read##bwlq(mem); \
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__addr++; \
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} \
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}
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__BUILD_MEMORY_STRING(b, u8)
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__BUILD_MEMORY_STRING(w, u16)
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#ifdef CONFIG_SUPERH32
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void __raw_writesl(void __iomem *addr, const void *data, int longlen);
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void __raw_readsl(const void __iomem *addr, void *data, int longlen);
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#else
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__BUILD_MEMORY_STRING(l, u32)
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#endif
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__BUILD_MEMORY_STRING(q, u64)
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#define writesb __raw_writesb
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#define writesw __raw_writesw
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#define writesl __raw_writesl
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#define readsb __raw_readsb
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#define readsw __raw_readsw
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#define readsl __raw_readsl
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#define readb_relaxed(a) readb(a)
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#define readw_relaxed(a) readw(a)
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#define readl_relaxed(a) readl(a)
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#define readq_relaxed(a) readq(a)
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/* Simple MMIO */
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#define ioread8(a) __raw_readb(a)
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#define ioread16(a) __raw_readw(a)
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#define ioread16be(a) be16_to_cpu(__raw_readw((a)))
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#define ioread32(a) __raw_readl(a)
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#define ioread32be(a) be32_to_cpu(__raw_readl((a)))
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#define iowrite8(v,a) __raw_writeb((v),(a))
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#define iowrite16(v,a) __raw_writew((v),(a))
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#define iowrite16be(v,a) __raw_writew(cpu_to_be16((v)),(a))
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#define iowrite32(v,a) __raw_writel((v),(a))
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#define iowrite32be(v,a) __raw_writel(cpu_to_be32((v)),(a))
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#define ioread8_rep(a, d, c) __raw_readsb((a), (d), (c))
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#define ioread16_rep(a, d, c) __raw_readsw((a), (d), (c))
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#define ioread32_rep(a, d, c) __raw_readsl((a), (d), (c))
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#define iowrite8_rep(a, s, c) __raw_writesb((a), (s), (c))
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#define iowrite16_rep(a, s, c) __raw_writesw((a), (s), (c))
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#define iowrite32_rep(a, s, c) __raw_writesl((a), (s), (c))
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/* synco on SH-4A, otherwise a nop */
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#define mmiowb() wmb()
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#define IO_SPACE_LIMIT 0xffffffff
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extern unsigned long generic_io_base;
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/*
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* This function provides a method for the generic case where a
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* board-specific ioport_map simply needs to return the port + some
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* arbitrary port base.
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*
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* We use this at board setup time to implicitly set the port base, and
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* as a result, we can use the generic ioport_map.
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*/
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static inline void __set_io_port_base(unsigned long pbase)
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{
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generic_io_base = pbase;
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}
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#define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n))
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/* We really want to try and get these to memcpy etc */
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void memcpy_fromio(void *, const volatile void __iomem *, unsigned long);
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void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
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void memset_io(volatile void __iomem *, int, unsigned long);
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/* Quad-word real-mode I/O, don't ask.. */
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unsigned long long peek_real_address_q(unsigned long long addr);
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unsigned long long poke_real_address_q(unsigned long long addr,
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unsigned long long val);
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#if !defined(CONFIG_MMU)
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#define virt_to_phys(address) ((unsigned long)(address))
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#define phys_to_virt(address) ((void *)(address))
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#else
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#define virt_to_phys(address) (__pa(address))
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#define phys_to_virt(address) (__va(address))
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#endif
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/*
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* On 32-bit SH, we traditionally have the whole physical address space
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* mapped at all times (as MIPS does), so "ioremap()" and "iounmap()" do
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* not need to do anything but place the address in the proper segment.
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* This is true for P1 and P2 addresses, as well as some P3 ones.
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* However, most of the P3 addresses and newer cores using extended
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* addressing need to map through page tables, so the ioremap()
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* implementation becomes a bit more complicated.
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*
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* See arch/sh/mm/ioremap.c for additional notes on this.
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*
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* We cheat a bit and always return uncachable areas until we've fixed
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* the drivers to handle caching properly.
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*
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* On the SH-5 the concept of segmentation in the 1:1 PXSEG sense simply
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* doesn't exist, so everything must go through page tables.
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*/
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#ifdef CONFIG_MMU
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void __iomem *__ioremap(unsigned long offset, unsigned long size,
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unsigned long flags);
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void __iounmap(void __iomem *addr);
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static inline void __iomem *
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__ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
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{
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#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED)
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unsigned long last_addr = offset + size - 1;
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#endif
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void __iomem *ret;
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ret = __ioremap_trapped(offset, size);
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if (ret)
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return ret;
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#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED)
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/*
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* For P1 and P2 space this is trivial, as everything is already
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* mapped. Uncached access for P1 addresses are done through P2.
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* In the P3 case or for addresses outside of the 29-bit space,
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* mapping must be done by the PMB or by using page tables.
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*/
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if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) {
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if (unlikely(flags & _PAGE_CACHABLE))
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return (void __iomem *)P1SEGADDR(offset);
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return (void __iomem *)P2SEGADDR(offset);
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}
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/* P4 above the store queues are always mapped. */
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if (unlikely(offset >= P3_ADDR_MAX))
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return (void __iomem *)P4SEGADDR(offset);
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#endif
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return __ioremap(offset, size, flags);
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}
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#else
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#define __ioremap_mode(offset, size, flags) ((void __iomem *)(offset))
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#define __iounmap(addr) do { } while (0)
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#endif /* CONFIG_MMU */
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#define ioremap(offset, size) \
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__ioremap_mode((offset), (size), 0)
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#define ioremap_nocache(offset, size) \
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__ioremap_mode((offset), (size), 0)
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#define ioremap_cache(offset, size) \
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__ioremap_mode((offset), (size), _PAGE_CACHABLE)
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#define p3_ioremap(offset, size, flags) \
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__ioremap((offset), (size), (flags))
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#define ioremap_prot(offset, size, flags) \
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__ioremap_mode((offset), (size), (flags))
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#define iounmap(addr) \
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__iounmap((addr))
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#define maybebadio(port) \
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printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \
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__func__, __LINE__, (port), (u32)__builtin_return_address(0))
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/*
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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* access
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*/
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#define xlate_dev_mem_ptr(p) __va(p)
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/*
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* Convert a virtual cached pointer to an uncached pointer
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*/
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#define xlate_dev_kmem_ptr(p) p
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#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
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int valid_phys_addr_range(unsigned long addr, size_t size);
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int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
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#endif /* __KERNEL__ */
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#endif /* __ASM_SH_IO_H */
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