diff options
| -rw-r--r-- | arch/arm64/include/asm/device.h | 26 | ||||
| -rw-r--r-- | arch/arm64/include/asm/fb.h | 34 | ||||
| -rw-r--r-- | arch/arm64/include/asm/io.h | 258 | ||||
| -rw-r--r-- | arch/arm64/kernel/io.c | 64 | ||||
| -rw-r--r-- | arch/arm64/mm/ioremap.c | 84 |
5 files changed, 466 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/device.h b/arch/arm64/include/asm/device.h new file mode 100644 index 000000000000..0d8453c755a8 --- /dev/null +++ b/arch/arm64/include/asm/device.h @@ -0,0 +1,26 @@ +/* + * 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_DEVICE_H +#define __ASM_DEVICE_H + +struct dev_archdata { + struct dma_map_ops *dma_ops; +}; + +struct pdev_archdata { +}; + +#endif diff --git a/arch/arm64/include/asm/fb.h b/arch/arm64/include/asm/fb.h new file mode 100644 index 000000000000..adb88a64b2fe --- /dev/null +++ b/arch/arm64/include/asm/fb.h @@ -0,0 +1,34 @@ +/* + * 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_FB_H_ +#define __ASM_FB_H_ + +#include <linux/fb.h> +#include <linux/fs.h> +#include <asm/page.h> + +static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, + unsigned long off) +{ + vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); +} + +static inline int fb_is_primary_device(struct fb_info *info) +{ + return 0; +} + +#endif /* __ASM_FB_H_ */ diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h new file mode 100644 index 000000000000..74a2a7d304a9 --- /dev/null +++ b/arch/arm64/include/asm/io.h @@ -0,0 +1,258 @@ +/* + * 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/pgtable.h> + +/* + * Generic IO read/write. These perform native-endian accesses. + */ +static inline void __raw_writeb(u8 val, volatile void __iomem *addr) +{ + asm volatile("strb %w0, [%1]" : : "r" (val), "r" (addr)); +} + +static inline void __raw_writew(u16 val, volatile void __iomem *addr) +{ + asm volatile("strh %w0, [%1]" : : "r" (val), "r" (addr)); +} + +static inline void __raw_writel(u32 val, volatile void __iomem *addr) +{ + asm volatile("str %w0, [%1]" : : "r" (val), "r" (addr)); +} + +static inline void __raw_writeq(u64 val, volatile void __iomem *addr) +{ + asm volatile("str %0, [%1]" : : "r" (val), "r" (addr)); +} + +static inline u8 __raw_readb(const volatile void __iomem *addr) +{ + u8 val; + asm volatile("ldrb %w0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +static inline u16 __raw_readw(const volatile void __iomem *addr) +{ + u16 val; + asm volatile("ldrh %w0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +static inline u32 __raw_readl(const volatile void __iomem *addr) +{ + u32 val; + asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +static inline u64 __raw_readq(const volatile void __iomem *addr) +{ + u64 val; + asm volatile("ldr %0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +/* IO barriers */ +#define __iormb() rmb() +#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 __v = __raw_readb(c); __v; }) +#define readw_relaxed(c) ({ u16 __v = le16_to_cpu((__force __le16)__raw_readw(c)); __v; }) +#define readl_relaxed(c) ({ u32 __v = le32_to_cpu((__force __le32)__raw_readl(c)); __v; }) + +#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))) + +/* + * 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; }) +#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; }) +#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __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)); }) + +/* + * I/O port access primitives. + */ +#define IO_SPACE_LIMIT 0xffff +#define PCI_IOBASE ((void __iomem *)0xffffffbbfffe0000UL) + +static inline u8 inb(unsigned long addr) +{ + return readb(addr + PCI_IOBASE); +} + +static inline u16 inw(unsigned long addr) +{ + return readw(addr + PCI_IOBASE); +} + +static inline u32 inl(unsigned long addr) +{ + return readl(addr + PCI_IOBASE); +} + +static inline void outb(u8 b, unsigned long addr) +{ + writeb(b, addr + PCI_IOBASE); +} + +static inline void outw(u16 b, unsigned long addr) +{ + writew(b, addr + PCI_IOBASE); +} + +static inline void outl(u32 b, unsigned long addr) +{ + writel(b, addr + PCI_IOBASE); +} + +#define inb_p(addr) inb(addr) +#define inw_p(addr) inw(addr) +#define inl_p(addr) inl(addr) + +#define outb_p(x, addr) outb((x), (addr)) +#define outw_p(x, addr) outw((x), (addr)) +#define outl_p(x, addr) outl((x), (addr)) + +static inline void insb(unsigned long addr, void *buffer, int count) +{ + u8 *buf = buffer; + while (count--) + *buf++ = __raw_readb(addr + PCI_IOBASE); +} + +static inline void insw(unsigned long addr, void *buffer, int count) +{ + u16 *buf = buffer; + while (count--) + *buf++ = __raw_readw(addr + PCI_IOBASE); +} + +static inline void insl(unsigned long addr, void *buffer, int count) +{ + u32 *buf = buffer; + while (count--) + *buf++ = __raw_readl(addr + PCI_IOBASE); +} + +static inline void outsb(unsigned long addr, const void *buffer, int count) +{ + const u8 *buf = buffer; + while (count--) + __raw_writeb(*buf++, addr + PCI_IOBASE); +} + +static inline void outsw(unsigned long addr, const void *buffer, int count) +{ + const u16 *buf = buffer; + while (count--) + __raw_writew(*buf++, addr + PCI_IOBASE); +} + +static inline void outsl(unsigned long addr, const void *buffer, int count) +{ + const u32 *buf = buffer; + while (count--) + __raw_writel(*buf++, addr + PCI_IOBASE); +} + +#define insb_p(port,to,len) insb(port,to,len) +#define insw_p(port,to,len) insw(port,to,len) +#define insl_p(port,to,len) insl(port,to,len) + +#define outsb_p(port,from,len) outsb(port,from,len) +#define outsw_p(port,from,len) outsw(port,from,len) +#define outsl_p(port,from,len) outsl(port,from,len) + +/* + * 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); + +#define PROT_DEFAULT (PTE_TYPE_PAGE | PTE_AF | PTE_DIRTY) +#define PROT_DEVICE_nGnRE (PROT_DEFAULT | PTE_XN | PTE_ATTRINDX(MT_DEVICE_nGnRE)) +#define PROT_NORMAL_NC (PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL_NC)) + +#define ioremap(addr, size) __ioremap((addr), (size), PROT_DEVICE_nGnRE) +#define ioremap_nocache(addr, size) __ioremap((addr), (size), PROT_DEVICE_nGnRE) +#define ioremap_wc(addr, size) __ioremap((addr), (size), PROT_NORMAL_NC) +#define iounmap __iounmap + +#define ARCH_HAS_IOREMAP_WC +#include <asm-generic/iomap.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(unsigned long 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); + +/* + * 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 + +#endif /* __KERNEL__ */ +#endif /* __ASM_IO_H */ diff --git a/arch/arm64/kernel/io.c b/arch/arm64/kernel/io.c new file mode 100644 index 000000000000..7d37ead4d199 --- /dev/null +++ b/arch/arm64/kernel/io.c @@ -0,0 +1,64 @@ +/* + * Based on arch/arm/kernel/io.c + * + * 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/>. + */ + +#include <linux/export.h> +#include <linux/types.h> +#include <linux/io.h> + +/* + * Copy data from IO memory space to "real" memory space. + */ +void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count) +{ + unsigned char *t = to; + while (count) { + count--; + *t = readb(from); + t++; + from++; + } +} +EXPORT_SYMBOL(__memcpy_fromio); + +/* + * Copy data from "real" memory space to IO memory space. + */ +void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count) +{ + const unsigned char *f = from; + while (count) { + count--; + writeb(*f, to); + f++; + to++; + } +} +EXPORT_SYMBOL(__memcpy_toio); + +/* + * "memset" on IO memory space. + */ +void __memset_io(volatile void __iomem *dst, int c, size_t count) +{ + while (count) { + count--; + writeb(c, dst); + dst++; + } +} +EXPORT_SYMBOL(__memset_io); diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c new file mode 100644 index 000000000000..1725cd6db37a --- /dev/null +++ b/arch/arm64/mm/ioremap.c @@ -0,0 +1,84 @@ +/* + * Based on arch/arm/mm/ioremap.c + * + * (C) Copyright 1995 1996 Linus Torvalds + * Hacked for ARM by Phil Blundell <philb@gnu.org> + * Hacked to allow all architectures to build, and various cleanups + * by 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/>. + */ + +#include <linux/export.h> +#include <linux/mm.h> +#include <linux/vmalloc.h> +#include <linux/io.h> + +static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size, + pgprot_t prot, void *caller) +{ + unsigned long last_addr; + unsigned long offset = phys_addr & ~PAGE_MASK; + int err; + unsigned long addr; + struct vm_struct *area; + + /* + * Page align the mapping address and size, taking account of any + * offset. + */ + phys_addr &= PAGE_MASK; + size = PAGE_ALIGN(size + offset); + + /* + * Don't allow wraparound, zero size or outside PHYS_MASK. + */ + last_addr = phys_addr + size - 1; + if (!size || last_addr < phys_addr || (last_addr & ~PHYS_MASK)) + return NULL; + + /* + * Don't allow RAM to be mapped. + */ + if (WARN_ON(pfn_valid(__phys_to_pfn(phys_addr)))) + return NULL; + + area = get_vm_area_caller(size, VM_IOREMAP, caller); + if (!area) + return NULL; + addr = (unsigned long)area->addr; + + err = ioremap_page_range(addr, addr + size, phys_addr, prot); + if (err) { + vunmap((void *)addr); + return NULL; + } + + return (void __iomem *)(offset + addr); +} + +void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot) +{ + return __ioremap_caller(phys_addr, size, prot, + __builtin_return_address(0)); +} +EXPORT_SYMBOL(__ioremap); + +void __iounmap(volatile void __iomem *io_addr) +{ + void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr); + + vunmap(addr); +} +EXPORT_SYMBOL(__iounmap); |