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/* SPDX-License-Identifier: GPL-2.0 / #ifndef __ASM_SH_IO_H #define __ASM_SH_IO_H / * Convention: * 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 * * 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} * * 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/addrspace.h> #include <asm/machvec.h> #include <asm/pgtable.h> #include <asm-generic/iomap.h> #ifdef __KERNEL__ #define __IO_PREFIX generic #include <asm/io_generic.h> #include <asm/io_trapped.h> #include <asm-generic/pci_iomap.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(); \ } __BUILD_UNCACHED_IO(b, u8) __BUILD_UNCACHED_IO(w, u16) __BUILD_UNCACHED_IO(l, u32) __BUILD_UNCACHED_IO(q, u64) #define __BUILD_MEMORY_STRING(pfx, bwlq, type) \ \ static inline void \ pfx##writes##bwlq(volatile void __iomem mem, const void addr, \ unsigned int count) \ { \ const volatile type __addr = addr; \ \ while (count--) { \ __raw_write##bwlq(__addr, mem); \ __addr++; \ } \ } \ \ static inline void pfx##reads##bwlq(volatile void __iomem mem, \ void addr, unsigned int count) \ { \ volatile type __addr = addr; \ \ while (count--) { \ __addr = __raw_read##bwlq(mem); \ __addr++; \ } \ } __BUILD_MEMORY_STRING(__raw_, b, u8) __BUILD_MEMORY_STRING(__raw_, w, u16) #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 __BUILD_MEMORY_STRING(__raw_, q, u64) #ifdef CONFIG_HAS_IOPORT_MAP / * Slowdown I/O port space accesses for antique hardware. / #undef CONF_SLOWDOWN_IO / * 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) { (unsigned long )&sh_io_port_base = pbase; barrier(); } #ifdef CONFIG_GENERIC_IOMAP #define __ioport_map ioport_map #else extern void __iomem __ioport_map(unsigned long addr, unsigned int size); #endif #ifdef CONF_SLOWDOWN_IO #define SLOW_DOWN_IO __raw_readw(sh_io_port_base) #else #define SLOW_DOWN_IO #endif #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; \ } #define __BUILD_IOPORT_PFX(bus, bwlq, type) \ __BUILD_IOPORT_SINGLE(bus, bwlq, type, ,) \ __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO) #define BUILDIO_IOPORT(bwlq, type) \ __BUILD_IOPORT_PFX(, bwlq, type) BUILDIO_IOPORT(b, u8) BUILDIO_IOPORT(w, u16) BUILDIO_IOPORT(l, u32) BUILDIO_IOPORT(q, u64) #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++; \ } \ } __BUILD_IOPORT_STRING(b, u8) __BUILD_IOPORT_STRING(w, u16) __BUILD_IOPORT_STRING(l, u32) __BUILD_IOPORT_STRING(q, u64) #else /* !CONFIG_HAS_IOPORT_MAP / #include <asm/io_noioport.h> #endif #define IO_SPACE_LIMIT 0xffffffff / 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); unsigned long long poke_real_address_q(unsigned long long addr, unsigned long long val); #if !defined(CONFIG_MMU) #define virt_to_phys(address) ((unsigned long)(address)) #define phys_to_virt(address) ((void )(address)) #else #define virt_to_phys(address) (__pa(address)) #define phys_to_virt(address) (__va(address)) #endif /* * On 32-bit 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. * * On the SH-5 the concept of segmentation in the 1:1 PXSEG sense simply * doesn't exist, so everything must go through page tables. / #ifdef CONFIG_MMU void __iomem __ioremap_caller(phys_addr_t offset, unsigned long size, pgprot_t prot, void caller); void __iounmap(void __iomem addr); static inline void __iomem * __ioremap(phys_addr_t offset, unsigned long size, pgprot_t prot) { return __ioremap_caller(offset, size, prot, __builtin_return_address(0)); } 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; /* * 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)) { 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 NULL; } 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); } #define ioremap_cache ioremap_cache #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 ioremap_uc ioremap static inline void iounmap(void __iomem addr) { __iounmap(addr); } /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access / #define xlate_dev_mem_ptr(p) __va(p) / * Convert a virtual cached pointer to an uncached pointer / #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 */

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