/* * Based on arch/arm/include/asm/io.h * * Copyright (C) 1996-2000 Russell King * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_IO_H #define __ASM_IO_H #ifdef __KERNEL__ #include <linux/types.h> #include <asm/byteorder.h> #include <asm/barrier.h> #include <asm/memory.h> #include <asm/pgtable.h> #include <asm/early_ioremap.h> #include <asm/alternative.h> #include <asm/cpufeature.h> #include <xen/xen.h> /* * Generic IO read/write. These perform native-endian accesses. */ #define __raw_writeb __raw_writeb static inline void __raw_writeb(u8 val, volatile void __iomem *addr) { asm volatile("strb %w0, [%1]" : : "rZ" (val), "r" (addr)); } #define __raw_writew __raw_writew static inline void __raw_writew(u16 val, volatile void __iomem *addr) { asm volatile("strh %w0, [%1]" : : "rZ" (val), "r" (addr)); } #define __raw_writel __raw_writel static inline void __raw_writel(u32 val, volatile void __iomem *addr) { asm volatile("str %w0, [%1]" : : "rZ" (val), "r" (addr)); } #define __raw_writeq __raw_writeq static inline void __raw_writeq(u64 val, volatile void __iomem *addr) { asm volatile("str %x0, [%1]" : : "rZ" (val), "r" (addr)); } #define __raw_readb __raw_readb static inline u8 __raw_readb(const volatile void __iomem *addr) { u8 val; asm volatile(ALTERNATIVE("ldrb %w0, [%1]", "ldarb %w0, [%1]", ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) : "=r" (val) : "r" (addr)); return val; } #define __raw_readw __raw_readw static inline u16 __raw_readw(const volatile void __iomem *addr) { u16 val; asm volatile(ALTERNATIVE("ldrh %w0, [%1]", "ldarh %w0, [%1]", ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) : "=r" (val) : "r" (addr)); return val; } #define __raw_readl __raw_readl static inline u32 __raw_readl(const volatile void __iomem *addr) { u32 val; asm volatile(ALTERNATIVE("ldr %w0, [%1]", "ldar %w0, [%1]", ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) : "=r" (val) : "r" (addr)); return val; } #define __raw_readq __raw_readq static inline u64 __raw_readq(const volatile void __iomem *addr) { u64 val; asm volatile(ALTERNATIVE("ldr %0, [%1]", "ldar %0, [%1]", ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) : "=r" (val) : "r" (addr)); return val; } /* IO barriers */ #define __iormb(v) \ ({ \ unsigned long tmp; \ \ rmb(); \ \ /* \ * Create a dummy control dependency from the IO read to any \ * later instructions. This ensures that a subsequent call to \ * udelay() will be ordered due to the ISB in get_cycles(). \ */ \ asm volatile("eor %0, %1, %1\n" \ "cbnz %0, ." \ : "=r" (tmp) : "r" ((unsigned long)(v)) \ : "memory"); \ }) #define __iowmb() wmb() #define mmiowb() do { } while (0) /* * Relaxed I/O memory access primitives. These follow the Device memory * ordering rules but do not guarantee any ordering relative to Normal memory * accesses. */ #define readb_relaxed(c) ({ u8 __r = __raw_readb(c); __r; }) #define readw_relaxed(c) ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; }) #define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; }) #define readq_relaxed(c) ({ u64 __r = le64_to_cpu((__force __le64)__raw_readq(c)); __r; }) #define writeb_relaxed(v,c) ((void)__raw_writeb((v),(c))) #define writew_relaxed(v,c) ((void)__raw_writew((__force u16)cpu_to_le16(v),(c))) #define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c))) #define writeq_relaxed(v,c) ((void)__raw_writeq((__force u64)cpu_to_le64(v),(c))) /* * I/O memory access primitives. Reads are ordered relative to any * following Normal memory access. Writes are ordered relative to any prior * Normal memory access. */ #define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(__v); __v; }) #define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(__v); __v; }) #define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(__v); __v; }) #define readq(c) ({ u64 __v = readq_relaxed(c); __iormb(__v); __v; }) #define writeb(v,c) ({ __iowmb(); writeb_relaxed((v),(c)); }) #define writew(v,c) ({ __iowmb(); writew_relaxed((v),(c)); }) #define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c)); }) #define writeq(v,c) ({ __iowmb(); writeq_relaxed((v),(c)); }) /* * I/O port access primitives. */ #define arch_has_dev_port() (1) #define IO_SPACE_LIMIT (PCI_IO_SIZE - 1) #define PCI_IOBASE ((void __iomem *)PCI_IO_START) /* * String version of I/O memory access operations. */ extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t); extern void __memcpy_toio(volatile void __iomem *, const void *, size_t); extern void __memset_io(volatile void __iomem *, int, size_t); #define memset_io(c,v,l) __memset_io((c),(v),(l)) #define memcpy_fromio(a,c,l) __memcpy_fromio((a),(c),(l)) #define memcpy_toio(c,a,l) __memcpy_toio((c),(a),(l)) /* * I/O memory mapping functions. */ extern void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot); extern void __iounmap(volatile void __iomem *addr); extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size); #define ioremap(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC)) #define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define iounmap __iounmap /* * PCI configuration space mapping function. * * The PCI specification disallows posted write configuration transactions. * Add an arch specific pci_remap_cfgspace() definition that is implemented * through nGnRnE device memory attribute as recommended by the ARM v8 * Architecture reference manual Issue A.k B2.8.2 "Device memory". */ #define pci_remap_cfgspace(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRnE)) /* * io{read,write}{16,32,64}be() macros */ #define ioread16be(p) ({ __u16 __v = be16_to_cpu((__force __be16)__raw_readw(p)); __iormb(__v); __v; }) #define ioread32be(p) ({ __u32 __v = be32_to_cpu((__force __be32)__raw_readl(p)); __iormb(__v); __v; }) #define ioread64be(p) ({ __u64 __v = be64_to_cpu((__force __be64)__raw_readq(p)); __iormb(__v); __v; }) #define iowrite16be(v,p) ({ __iowmb(); __raw_writew((__force __u16)cpu_to_be16(v), p); }) #define iowrite32be(v,p) ({ __iowmb(); __raw_writel((__force __u32)cpu_to_be32(v), p); }) #define iowrite64be(v,p) ({ __iowmb(); __raw_writeq((__force __u64)cpu_to_be64(v), p); }) #include <asm-generic/io.h> /* * More restrictive address range checking than the default implementation * (PHYS_OFFSET and PHYS_MASK taken into account). */ #define ARCH_HAS_VALID_PHYS_ADDR_RANGE extern int valid_phys_addr_range(phys_addr_t addr, size_t size); extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); extern int devmem_is_allowed(unsigned long pfn); struct bio_vec; extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, const struct bio_vec *vec2); #define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ (__BIOVEC_PHYS_MERGEABLE(vec1, vec2) && \ (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))) #endif /* __KERNEL__ */ #endif /* __ASM_IO_H */
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xen | Folder | 0755 |
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Kbuild | File | 703 B | 0644 |
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acenv.h | File | 541 B | 0644 |
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acpi.h | File | 4.34 KB | 0644 |
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alternative.h | File | 7.63 KB | 0644 |
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arch_gicv3.h | File | 3.44 KB | 0644 |
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arch_timer.h | File | 4.87 KB | 0644 |
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arm-cci.h | File | 794 B | 0644 |
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asm-bug.h | File | 1.45 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-uaccess.h | File | 2.09 KB | 0644 |
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assembler.h | File | 13.51 KB | 0644 |
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atomic.h | File | 8.35 KB | 0644 |
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atomic_ll_sc.h | File | 10.61 KB | 0644 |
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atomic_lse.h | File | 14.82 KB | 0644 |
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barrier.h | File | 3.78 KB | 0644 |
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bitops.h | File | 1.9 KB | 0644 |
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bitrev.h | File | 452 B | 0644 |
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boot.h | File | 384 B | 0644 |
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brk-imm.h | File | 706 B | 0644 |
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bug.h | File | 1.09 KB | 0644 |
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cache.h | File | 2.23 KB | 0644 |
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cacheflush.h | File | 4.87 KB | 0644 |
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checksum.h | File | 1.35 KB | 0644 |
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clocksource.h | File | 192 B | 0644 |
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cmpxchg.h | File | 7.98 KB | 0644 |
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compat.h | File | 7.15 KB | 0644 |
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compiler.h | File | 1.18 KB | 0644 |
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cpu.h | File | 1.84 KB | 0644 |
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cpu_ops.h | File | 2.73 KB | 0644 |
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cpucaps.h | File | 1.87 KB | 0644 |
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cpufeature.h | File | 19.14 KB | 0644 |
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cpuidle.h | File | 401 B | 0644 |
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cputype.h | File | 8.1 KB | 0644 |
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current.h | File | 517 B | 0644 |
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daifflags.h | File | 1.59 KB | 0644 |
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dcc.h | File | 1.36 KB | 0644 |
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debug-monitors.h | File | 3.76 KB | 0644 |
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device.h | File | 886 B | 0644 |
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dma-mapping.h | File | 2.42 KB | 0644 |
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dmi.h | File | 850 B | 0644 |
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efi.h | File | 4.57 KB | 0644 |
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elf.h | File | 5.7 KB | 0644 |
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esr.h | File | 9.02 KB | 0644 |
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exception.h | File | 1.21 KB | 0644 |
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exec.h | File | 868 B | 0644 |
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extable.h | File | 815 B | 0644 |
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fb.h | File | 1000 B | 0644 |
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fixmap.h | File | 2.91 KB | 0644 |
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fpsimd.h | File | 4.21 KB | 0644 |
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fpsimdmacros.h | File | 5.62 KB | 0644 |
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ftrace.h | File | 1.92 KB | 0644 |
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futex.h | File | 3.41 KB | 0644 |
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hardirq.h | File | 2.08 KB | 0644 |
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hugetlb.h | File | 2.71 KB | 0644 |
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hw_breakpoint.h | File | 4.46 KB | 0644 |
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hwcap.h | File | 1.86 KB | 0644 |
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hypervisor.h | File | 144 B | 0644 |
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insn.h | File | 16.03 KB | 0644 |
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io.h | File | 7.72 KB | 0644 |
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irq.h | File | 307 B | 0644 |
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irq_work.h | File | 228 B | 0644 |
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irqflags.h | File | 2.3 KB | 0644 |
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jump_label.h | File | 1.68 KB | 0644 |
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kasan.h | File | 1.16 KB | 0644 |
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kernel-pgtable.h | File | 4.03 KB | 0644 |
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kexec.h | File | 2.42 KB | 0644 |
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kgdb.h | File | 3.79 KB | 0644 |
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kprobes.h | File | 1.74 KB | 0644 |
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kvm_arm.h | File | 8.38 KB | 0644 |
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kvm_asm.h | File | 4.26 KB | 0644 |
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kvm_coproc.h | File | 2.04 KB | 0644 |
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kvm_emulate.h | File | 10.38 KB | 0644 |
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kvm_host.h | File | 15.73 KB | 0644 |
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kvm_hyp.h | File | 5.79 KB | 0644 |
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kvm_mmio.h | File | 1.3 KB | 0644 |
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kvm_mmu.h | File | 11.72 KB | 0644 |
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linkage.h | File | 114 B | 0644 |
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lse.h | File | 1.26 KB | 0644 |
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memblock.h | File | 720 B | 0644 |
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memory.h | File | 9.16 KB | 0644 |
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mmu.h | File | 2.76 KB | 0644 |
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mmu_context.h | File | 6.35 KB | 0644 |
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mmzone.h | File | 266 B | 0644 |
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module.h | File | 2.8 KB | 0644 |
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neon.h | File | 815 B | 0644 |
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numa.h | File | 1.33 KB | 0644 |
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page-def.h | File | 1.17 KB | 0644 |
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page.h | File | 1.61 KB | 0644 |
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paravirt.h | File | 458 B | 0644 |
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pci.h | File | 878 B | 0644 |
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percpu.h | File | 7.48 KB | 0644 |
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perf_event.h | File | 3.17 KB | 0644 |
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pgalloc.h | File | 3.71 KB | 0644 |
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pgtable-hwdef.h | File | 9.4 KB | 0644 |
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pgtable-prot.h | File | 4.38 KB | 0644 |
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pgtable-types.h | File | 1.84 KB | 0644 |
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pgtable.h | File | 21.55 KB | 0644 |
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probes.h | File | 1022 B | 0644 |
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proc-fns.h | File | 1.21 KB | 0644 |
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processor.h | File | 6.52 KB | 0644 |
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ptdump.h | File | 1.42 KB | 0644 |
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ptrace.h | File | 9 KB | 0644 |
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sdei.h | File | 1.46 KB | 0644 |
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seccomp.h | File | 714 B | 0644 |
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sections.h | File | 1.46 KB | 0644 |
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shmparam.h | File | 965 B | 0644 |
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signal32.h | File | 1.45 KB | 0644 |
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simd.h | File | 1.39 KB | 0644 |
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smp.h | File | 4.23 KB | 0644 |
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smp_plat.h | File | 1.43 KB | 0644 |
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sparsemem.h | File | 771 B | 0644 |
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spinlock.h | File | 3.33 KB | 0644 |
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spinlock_types.h | File | 1.06 KB | 0644 |
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stack_pointer.h | File | 247 B | 0644 |
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stackprotector.h | File | 1.11 KB | 0644 |
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stacktrace.h | File | 2.53 KB | 0644 |
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stage2_pgtable-nopmd.h | File | 1.3 KB | 0644 |
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stage2_pgtable-nopud.h | File | 1.24 KB | 0644 |
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stage2_pgtable.h | File | 4.89 KB | 0644 |
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stat.h | File | 1.43 KB | 0644 |
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string.h | File | 2.33 KB | 0644 |
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suspend.h | File | 1.65 KB | 0644 |
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sync_bitops.h | File | 1.11 KB | 0644 |
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syscall.h | File | 2.87 KB | 0644 |
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sysreg.h | File | 25.1 KB | 0644 |
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system_misc.h | File | 1.86 KB | 0644 |
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thread_info.h | File | 3.93 KB | 0644 |
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timex.h | File | 883 B | 0644 |
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tlb.h | File | 2.22 KB | 0644 |
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tlbflush.h | File | 5.38 KB | 0644 |
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topology.h | File | 1.29 KB | 0644 |
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traps.h | File | 3.33 KB | 0644 |
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uaccess.h | File | 12.01 KB | 0644 |
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unistd.h | File | 1.6 KB | 0644 |
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unistd32.h | File | 27.53 KB | 0644 |
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uprobes.h | File | 777 B | 0644 |
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vdso.h | File | 1.09 KB | 0644 |
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vdso_datapage.h | File | 1.53 KB | 0644 |
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vectors.h | File | 1.75 KB | 0644 |
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virt.h | File | 3 KB | 0644 |
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vmap_stack.h | File | 769 B | 0644 |
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word-at-a-time.h | File | 2.22 KB | 0644 |
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