mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
7e6735c357
This patch fixes the /dev/mem driver to use phys_addr_t for physical addresses. This is required on PAE systems, especially those that run entirely out of >4G physical memory space. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
391 lines
11 KiB
C
391 lines
11 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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#include <linux/errno.h>
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#include <asm/cache.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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#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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#include <mach/mangle-port.h>
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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_relaxed(c) ({ u8 __v = ioswabb(__raw_readb(c)); __v; })
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#define readw_relaxed(c) ({ u16 __v = ioswabw(__raw_readw(c)); __v; })
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#define readl_relaxed(c) ({ u32 __v = ioswabl(__raw_readl(c)); __v; })
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#define readq_relaxed(c) ({ u64 __v = ioswabq(__raw_readq(c)); __v; })
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#define writeb_relaxed(v,c) ((void)__raw_writeb((__force u8)ioswabb(v),c))
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#define writew_relaxed(v,c) ((void)__raw_writew((__force u16)ioswabw(v),c))
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#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)ioswabl(v),c))
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#define writeq_relaxed(v,c) ((void)__raw_writeq((__force u64)ioswabq(v),c))
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#define readb(a) ({ u8 r_ = readb_relaxed(a); rmb(); r_; })
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#define readw(a) ({ u16 r_ = readw_relaxed(a); rmb(); r_; })
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#define readl(a) ({ u32 r_ = readl_relaxed(a); rmb(); r_; })
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#define readq(a) ({ u64 r_ = readq_relaxed(a); rmb(); r_; })
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#define writeb(v,a) ({ wmb(); writeb_relaxed((v),(a)); })
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#define writew(v,a) ({ wmb(); writew_relaxed((v),(a)); })
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#define writel(v,a) ({ wmb(); writel_relaxed((v),(a)); })
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#define writeq(v,a) ({ wmb(); writeq_relaxed((v),(a)); })
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#define readsb(p,d,l) __raw_readsb(p,d,l)
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#define readsw(p,d,l) __raw_readsw(p,d,l)
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#define readsl(p,d,l) __raw_readsl(p,d,l)
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#define writesb(p,d,l) __raw_writesb(p,d,l)
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#define writesw(p,d,l) __raw_writesw(p,d,l)
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#define writesl(p,d,l) __raw_writesl(p,d,l)
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#define __BUILD_UNCACHED_IO(bwlq, type) \
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static inline type read##bwlq##_uncached(unsigned long addr) \
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{ \
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type ret; \
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jump_to_uncached(); \
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ret = __raw_read##bwlq(addr); \
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back_to_cached(); \
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return ret; \
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} \
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\
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static inline void write##bwlq##_uncached(type v, unsigned long addr) \
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{ \
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jump_to_uncached(); \
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__raw_write##bwlq(v, addr); \
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back_to_cached(); \
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}
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__BUILD_UNCACHED_IO(b, u8)
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__BUILD_UNCACHED_IO(w, u16)
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__BUILD_UNCACHED_IO(l, u32)
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__BUILD_UNCACHED_IO(q, u64)
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#define __BUILD_MEMORY_STRING(pfx, bwlq, type) \
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\
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static inline void \
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pfx##writes##bwlq(volatile void __iomem *mem, const void *addr, \
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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 pfx##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(__raw_, b, u8)
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__BUILD_MEMORY_STRING(__raw_, 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(__raw_, l, u32)
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#endif
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__BUILD_MEMORY_STRING(__raw_, q, u64)
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#ifdef CONFIG_HAS_IOPORT
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/*
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* Slowdown I/O port space accesses for antique hardware.
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*/
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#undef CONF_SLOWDOWN_IO
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/*
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* On SuperH I/O ports are memory mapped, so we access them using normal
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* load/store instructions. sh_io_port_base is the virtual address to
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* which all ports are being mapped.
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*/
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extern unsigned long sh_io_port_base;
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static inline void __set_io_port_base(unsigned long pbase)
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{
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*(unsigned long *)&sh_io_port_base = pbase;
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barrier();
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}
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#ifdef CONFIG_GENERIC_IOMAP
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#define __ioport_map ioport_map
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#else
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extern void __iomem *__ioport_map(unsigned long addr, unsigned int size);
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#endif
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#ifdef CONF_SLOWDOWN_IO
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#define SLOW_DOWN_IO __raw_readw(sh_io_port_base)
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#else
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#define SLOW_DOWN_IO
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#endif
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#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p, slow) \
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\
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static inline void pfx##out##bwlq##p(type val, unsigned long port) \
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{ \
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volatile type *__addr; \
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\
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__addr = __ioport_map(port, sizeof(type)); \
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*__addr = val; \
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slow; \
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} \
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\
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static inline type pfx##in##bwlq##p(unsigned long port) \
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{ \
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volatile type *__addr; \
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type __val; \
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\
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__addr = __ioport_map(port, sizeof(type)); \
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__val = *__addr; \
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slow; \
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\
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return __val; \
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}
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#define __BUILD_IOPORT_PFX(bus, bwlq, type) \
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__BUILD_IOPORT_SINGLE(bus, bwlq, type, ,) \
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__BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
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#define BUILDIO_IOPORT(bwlq, type) \
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__BUILD_IOPORT_PFX(, bwlq, type)
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BUILDIO_IOPORT(b, u8)
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BUILDIO_IOPORT(w, u16)
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BUILDIO_IOPORT(l, u32)
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BUILDIO_IOPORT(q, u64)
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#define __BUILD_IOPORT_STRING(bwlq, type) \
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\
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static inline void outs##bwlq(unsigned long port, const void *addr, \
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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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out##bwlq(*__addr, port); \
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__addr++; \
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} \
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} \
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\
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static inline void ins##bwlq(unsigned long port, void *addr, \
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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 = in##bwlq(port); \
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__addr++; \
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} \
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}
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__BUILD_IOPORT_STRING(b, u8)
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__BUILD_IOPORT_STRING(w, u16)
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__BUILD_IOPORT_STRING(l, u32)
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__BUILD_IOPORT_STRING(q, u64)
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#else /* !CONFIG_HAS_IOPORT */
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#include <asm/io_noioport.h>
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#endif
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#define IO_SPACE_LIMIT 0xffffffff
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/* synco on SH-4A, otherwise a nop */
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#define mmiowb() wmb()
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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_caller(phys_addr_t offset, unsigned long size,
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pgprot_t prot, void *caller);
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void __iounmap(void __iomem *addr);
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static inline void __iomem *
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__ioremap(phys_addr_t offset, unsigned long size, pgprot_t prot)
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{
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return __ioremap_caller(offset, size, prot, __builtin_return_address(0));
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}
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static inline void __iomem *
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__ioremap_29bit(phys_addr_t offset, unsigned long size, pgprot_t prot)
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{
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#ifdef CONFIG_29BIT
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phys_addr_t last_addr = offset + size - 1;
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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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u64 flags = pgprot_val(prot);
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/*
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* Anything using the legacy PTEA space attributes needs
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* to be kicked down to page table mappings.
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*/
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if (unlikely(flags & _PAGE_PCC_MASK))
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return NULL;
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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 NULL;
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}
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static inline void __iomem *
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__ioremap_mode(phys_addr_t offset, unsigned long size, pgprot_t prot)
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{
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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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ret = __ioremap_29bit(offset, size, prot);
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if (ret)
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return ret;
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return __ioremap(offset, size, prot);
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}
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#else
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#define __ioremap(offset, size, prot) ((void __iomem *)(offset))
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#define __ioremap_mode(offset, size, prot) ((void __iomem *)(offset))
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#define __iounmap(addr) do { } while (0)
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#endif /* CONFIG_MMU */
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static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
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{
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return __ioremap_mode(offset, size, PAGE_KERNEL_NOCACHE);
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}
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static inline void __iomem *
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ioremap_cache(phys_addr_t offset, unsigned long size)
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{
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return __ioremap_mode(offset, size, PAGE_KERNEL);
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}
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#ifdef CONFIG_HAVE_IOREMAP_PROT
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static inline void __iomem *
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ioremap_prot(phys_addr_t offset, unsigned long size, unsigned long flags)
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{
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return __ioremap_mode(offset, size, __pgprot(flags));
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}
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#endif
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#ifdef CONFIG_IOREMAP_FIXED
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extern void __iomem *ioremap_fixed(phys_addr_t, unsigned long, pgprot_t);
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extern int iounmap_fixed(void __iomem *);
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extern void ioremap_fixed_init(void);
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#else
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static inline void __iomem *
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ioremap_fixed(phys_addr_t phys_addr, unsigned long size, pgprot_t prot)
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{
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BUG();
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return NULL;
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}
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static inline void ioremap_fixed_init(void) { }
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static inline int iounmap_fixed(void __iomem *addr) { return -EINVAL; }
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#endif
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#define ioremap_nocache ioremap
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#define iounmap __iounmap
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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(phys_addr_t 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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