diff options
Diffstat (limited to 'arch/microblaze/include/asm')
| -rw-r--r-- | arch/microblaze/include/asm/device.h | 4 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/dma-mapping.h | 154 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/futex.h | 2 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/io.h | 36 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/irq.h | 37 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/page.h | 12 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pci-bridge.h | 195 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pci.h | 178 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pgalloc.h | 2 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pgtable.h | 40 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/processor.h | 1 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/prom.h | 15 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/segment.h | 49 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/system.h | 3 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/thread_info.h | 5 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/tlbflush.h | 5 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/uaccess.h | 447 |
17 files changed, 894 insertions, 291 deletions
diff --git a/arch/microblaze/include/asm/device.h b/arch/microblaze/include/asm/device.h index 78a038452c0f..402b46e630f6 100644 --- a/arch/microblaze/include/asm/device.h +++ b/arch/microblaze/include/asm/device.h @@ -14,6 +14,10 @@ struct device_node; struct dev_archdata { /* Optional pointer to an OF device node */ struct device_node *of_node; + + /* DMA operations on that device */ + struct dma_map_ops *dma_ops; + void *dma_data; }; struct pdev_archdata { diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h index d00e40099165..18b3731c8509 100644 --- a/arch/microblaze/include/asm/dma-mapping.h +++ b/arch/microblaze/include/asm/dma-mapping.h @@ -1 +1,153 @@ -#include <asm-generic/dma-mapping-broken.h> +/* + * Implements the generic device dma API for microblaze and the pci + * + * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2009-2010 PetaLogix + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * This file is base on powerpc and x86 dma-mapping.h versions + * Copyright (C) 2004 IBM + */ + +#ifndef _ASM_MICROBLAZE_DMA_MAPPING_H +#define _ASM_MICROBLAZE_DMA_MAPPING_H + +/* + * See Documentation/PCI/PCI-DMA-mapping.txt and + * Documentation/DMA-API.txt for documentation. + */ + +#include <linux/types.h> +#include <linux/cache.h> +#include <linux/mm.h> +#include <linux/scatterlist.h> +#include <linux/dma-debug.h> +#include <linux/dma-attrs.h> +#include <asm/io.h> +#include <asm-generic/dma-coherent.h> + +#define DMA_ERROR_CODE (~(dma_addr_t)0x0) + +#define __dma_alloc_coherent(dev, gfp, size, handle) NULL +#define __dma_free_coherent(size, addr) ((void)0) +#define __dma_sync(addr, size, rw) ((void)0) + +static inline unsigned long device_to_mask(struct device *dev) +{ + if (dev->dma_mask && *dev->dma_mask) + return *dev->dma_mask; + /* Assume devices without mask can take 32 bit addresses */ + return 0xfffffffful; +} + +extern struct dma_map_ops *dma_ops; + +/* + * Available generic sets of operations + */ +extern struct dma_map_ops dma_direct_ops; + +static inline struct dma_map_ops *get_dma_ops(struct device *dev) +{ + /* We don't handle the NULL dev case for ISA for now. We could + * do it via an out of line call but it is not needed for now. The + * only ISA DMA device we support is the floppy and we have a hack + * in the floppy driver directly to get a device for us. + */ + if (unlikely(!dev) || !dev->archdata.dma_ops) + return NULL; + + return dev->archdata.dma_ops; +} + +static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) +{ + dev->archdata.dma_ops = ops; +} + +static inline int dma_supported(struct device *dev, u64 mask) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + if (unlikely(!ops)) + return 0; + if (!ops->dma_supported) + return 1; + return ops->dma_supported(dev, mask); +} + +#ifdef CONFIG_PCI +/* We have our own implementation of pci_set_dma_mask() */ +#define HAVE_ARCH_PCI_SET_DMA_MASK + +#endif + +static inline int dma_set_mask(struct device *dev, u64 dma_mask) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + if (unlikely(ops == NULL)) + return -EIO; + if (ops->set_dma_mask) + return ops->set_dma_mask(dev, dma_mask); + if (!dev->dma_mask || !dma_supported(dev, dma_mask)) + return -EIO; + *dev->dma_mask = dma_mask; + return 0; +} + +#include <asm-generic/dma-mapping-common.h> + +static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + if (ops->mapping_error) + return ops->mapping_error(dev, dma_addr); + + return (dma_addr == DMA_ERROR_CODE); +} + +#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) +#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) +#define dma_is_consistent(d, h) (1) + +static inline void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + void *memory; + + BUG_ON(!ops); + + memory = ops->alloc_coherent(dev, size, dma_handle, flag); + + debug_dma_alloc_coherent(dev, size, *dma_handle, memory); + return memory; +} + +static inline void dma_free_coherent(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_handle) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!ops); + debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); + ops->free_coherent(dev, size, cpu_addr, dma_handle); +} + +static inline int dma_get_cache_alignment(void) +{ + return L1_CACHE_BYTES; +} + +static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(direction == DMA_NONE); + __dma_sync(vaddr, size, (int)direction); +} + +#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ diff --git a/arch/microblaze/include/asm/futex.h b/arch/microblaze/include/asm/futex.h index 8dbb6e7a03a2..ad3fd61b2fe7 100644 --- a/arch/microblaze/include/asm/futex.h +++ b/arch/microblaze/include/asm/futex.h @@ -55,7 +55,7 @@ futex_atomic_op_inuser(int encoded_op, int __user *uaddr) __futex_atomic_op("or %1,%0,%4;", ret, oldval, uaddr, oparg); break; case FUTEX_OP_ANDN: - __futex_atomic_op("and %1,%0,%4;", ret, oldval, uaddr, oparg); + __futex_atomic_op("andn %1,%0,%4;", ret, oldval, uaddr, oparg); break; case FUTEX_OP_XOR: __futex_atomic_op("xor %1,%0,%4;", ret, oldval, uaddr, oparg); diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h index 267c7c779e53..e45a6eea92e0 100644 --- a/arch/microblaze/include/asm/io.h +++ b/arch/microblaze/include/asm/io.h @@ -15,7 +15,23 @@ #include <asm/page.h> #include <linux/types.h> #include <linux/mm.h> /* Get struct page {...} */ +#include <asm-generic/iomap.h> +#ifndef CONFIG_PCI +#define _IO_BASE 0 +#define _ISA_MEM_BASE 0 +#define PCI_DRAM_OFFSET 0 +#else +#define _IO_BASE isa_io_base +#define _ISA_MEM_BASE isa_mem_base +#define PCI_DRAM_OFFSET pci_dram_offset +#endif + +extern unsigned long isa_io_base; +extern unsigned long pci_io_base; +extern unsigned long pci_dram_offset; + +extern resource_size_t isa_mem_base; #define IO_SPACE_LIMIT (0xFFFFFFFF) @@ -92,6 +108,11 @@ static inline void writel(unsigned int v, volatile void __iomem *addr) #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) +#define ioread16be(addr) __raw_readw((u16 *)(addr)) +#define ioread32be(addr) __raw_readl((u32 *)(addr)) +#define iowrite16be(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) +#define iowrite32be(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) + /* These are the definitions for the x86 IO instructions * inb/inw/inl/outb/outw/outl, the "string" versions * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions @@ -124,9 +145,6 @@ static inline void writel(unsigned int v, volatile void __iomem *addr) #define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) #define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) -#define __page_address(page) \ - (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) -#define page_to_phys(page) virt_to_phys((void *)__page_address(page)) #define page_to_bus(page) (page_to_phys(page)) #define bus_to_virt(addr) (phys_to_virt(addr)) @@ -227,15 +245,7 @@ static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, #define out_8(a, v) __raw_writeb((v), (a)) #define in_8(a) __raw_readb(a) -/* FIXME */ -static inline void __iomem *ioport_map(unsigned long port, unsigned int len) -{ - return (void __iomem *) (port); -} - -static inline void ioport_unmap(void __iomem *addr) -{ - /* Nothing to do */ -} +#define ioport_map(port, nr) ((void __iomem *)(port)) +#define ioport_unmap(addr) #endif /* _ASM_MICROBLAZE_IO_H */ diff --git a/arch/microblaze/include/asm/irq.h b/arch/microblaze/include/asm/irq.h index 90f050535ebe..31a35c33df63 100644 --- a/arch/microblaze/include/asm/irq.h +++ b/arch/microblaze/include/asm/irq.h @@ -14,6 +14,12 @@ #include <linux/interrupt.h> +/* This type is the placeholder for a hardware interrupt number. It has to + * be big enough to enclose whatever representation is used by a given + * platform. + */ +typedef unsigned long irq_hw_number_t; + extern unsigned int nr_irq; #define NO_IRQ (-1) @@ -21,7 +27,8 @@ extern unsigned int nr_irq; struct pt_regs; extern void do_IRQ(struct pt_regs *regs); -/* irq_of_parse_and_map - Parse and Map an interrupt into linux virq space +/** + * irq_of_parse_and_map - Parse and Map an interrupt into linux virq space * @device: Device node of the device whose interrupt is to be mapped * @index: Index of the interrupt to map * @@ -40,4 +47,32 @@ static inline void irq_dispose_mapping(unsigned int virq) return; } +struct irq_host; + +/** + * irq_create_mapping - Map a hardware interrupt into linux virq space + * @host: host owning this hardware interrupt or NULL for default host + * @hwirq: hardware irq number in that host space + * + * Only one mapping per hardware interrupt is permitted. Returns a linux + * virq number. + * If the sense/trigger is to be specified, set_irq_type() should be called + * on the number returned from that call. + */ +extern unsigned int irq_create_mapping(struct irq_host *host, + irq_hw_number_t hwirq); + +/** + * irq_create_of_mapping - Map a hardware interrupt into linux virq space + * @controller: Device node of the interrupt controller + * @inspec: Interrupt specifier from the device-tree + * @intsize: Size of the interrupt specifier from the device-tree + * + * This function is identical to irq_create_mapping except that it takes + * as input informations straight from the device-tree (typically the results + * of the of_irq_map_*() functions. + */ +extern unsigned int irq_create_of_mapping(struct device_node *controller, + u32 *intspec, unsigned int intsize); + #endif /* _ASM_MICROBLAZE_IRQ_H */ diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index 9b66c0fa9a32..2dd1d04129e0 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -62,12 +62,6 @@ extern unsigned int __page_offset; #define PAGE_OFFSET CONFIG_KERNEL_START /* - * MAP_NR -- given an address, calculate the index of the page struct which - * points to the address's page. - */ -#define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT) - -/* * The basic type of a PTE - 32 bit physical addressing. */ typedef unsigned long pte_basic_t; @@ -154,7 +148,11 @@ extern int page_is_ram(unsigned long pfn); # define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) # ifdef CONFIG_MMU -# define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr)) + +# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)) +# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) +# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) + # else /* CONFIG_MMU */ # define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) # define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) diff --git a/arch/microblaze/include/asm/pci-bridge.h b/arch/microblaze/include/asm/pci-bridge.h index 7ad28f6f5f1a..0c77cda9f5d8 100644 --- a/arch/microblaze/include/asm/pci-bridge.h +++ b/arch/microblaze/include/asm/pci-bridge.h @@ -1 +1,196 @@ +#ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H +#define _ASM_MICROBLAZE_PCI_BRIDGE_H +#ifdef __KERNEL__ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ #include <linux/pci.h> +#include <linux/list.h> +#include <linux/ioport.h> + +struct device_node; + +enum { + /* Force re-assigning all resources (ignore firmware + * setup completely) + */ + PCI_REASSIGN_ALL_RSRC = 0x00000001, + + /* Re-assign all bus numbers */ + PCI_REASSIGN_ALL_BUS = 0x00000002, + + /* Do not try to assign, just use existing setup */ + PCI_PROBE_ONLY = 0x00000004, + + /* Don't bother with ISA alignment unless the bridge has + * ISA forwarding enabled + */ + PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, + + /* Enable domain numbers in /proc */ + PCI_ENABLE_PROC_DOMAINS = 0x00000010, + /* ... except for domain 0 */ + PCI_COMPAT_DOMAIN_0 = 0x00000020, +}; + +/* + * Structure of a PCI controller (host bridge) + */ +struct pci_controller { + struct pci_bus *bus; + char is_dynamic; + struct device_node *dn; + struct list_head list_node; + struct device *parent; + + int first_busno; + int last_busno; + + int self_busno; + + void __iomem *io_base_virt; + resource_size_t io_base_phys; + + resource_size_t pci_io_size; + + /* Some machines (PReP) have a non 1:1 mapping of + * the PCI memory space in the CPU bus space + */ + resource_size_t pci_mem_offset; + + /* Some machines have a special region to forward the ISA + * "memory" cycles such as VGA memory regions. Left to 0 + * if unsupported + */ + resource_size_t isa_mem_phys; + resource_size_t isa_mem_size; + + struct pci_ops *ops; + unsigned int __iomem *cfg_addr; + void __iomem *cfg_data; + + /* + * Used for variants of PCI indirect handling and possible quirks: + * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 + * EXT_REG - provides access to PCI-e extended registers + * SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS + * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS + * to determine which bus number to match on when generating type0 + * config cycles + * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with + * hanging if we don't have link and try to do config cycles to + * anything but the PHB. Only allow talking to the PHB if this is + * set. + * BIG_ENDIAN - cfg_addr is a big endian register + * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs + * on the PLB4. Effectively disable MRM commands by setting this. + */ +#define INDIRECT_TYPE_SET_CFG_TYPE 0x00000001 +#define INDIRECT_TYPE_EXT_REG 0x00000002 +#define INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004 +#define INDIRECT_TYPE_NO_PCIE_LINK 0x00000008 +#define INDIRECT_TYPE_BIG_ENDIAN 0x00000010 +#define INDIRECT_TYPE_BROKEN_MRM 0x00000020 + u32 indirect_type; + + /* Currently, we limit ourselves to 1 IO range and 3 mem + * ranges since the common pci_bus structure can't handle more + */ + struct resource io_resource; + struct resource mem_resources[3]; + int global_number; /* PCI domain number */ +}; + +static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) +{ + return bus->sysdata; +} + +static inline int isa_vaddr_is_ioport(void __iomem *address) +{ + /* No specific ISA handling on ppc32 at this stage, it + * all goes through PCI + */ + return 0; +} + +/* These are used for config access before all the PCI probing + has been done. */ +extern int early_read_config_byte(struct pci_controller *hose, int bus, + int dev_fn, int where, u8 *val); +extern int early_read_config_word(struct pci_controller *hose, int bus, + int dev_fn, int where, u16 *val); +extern int early_read_config_dword(struct pci_controller *hose, int bus, + int dev_fn, int where, u32 *val); +extern int early_write_config_byte(struct pci_controller *hose, int bus, + int dev_fn, int where, u8 val); +extern int early_write_config_word(struct pci_controller *hose, int bus, + int dev_fn, int where, u16 val); +extern int early_write_config_dword(struct pci_controller *hose, int bus, + int dev_fn, int where, u32 val); + +extern int early_find_capability(struct pci_controller *hose, int bus, + int dev_fn, int cap); + +extern void setup_indirect_pci(struct pci_controller *hose, + resource_size_t cfg_addr, + resource_size_t cfg_data, u32 flags); + +/* Get the PCI host controller for an OF device */ +extern struct pci_controller *pci_find_hose_for_OF_device( + struct device_node *node); + +/* Fill up host controller resources from the OF node */ +extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, + struct device_node *dev, int primary); + +/* Allocate & free a PCI host bridge structure */ +extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); +extern void pcibios_free_controller(struct pci_controller *phb); +extern void pcibios_setup_phb_resources(struct pci_controller *hose); + +#ifdef CONFIG_PCI +extern unsigned int pci_flags; + +static inline void pci_set_flags(int flags) +{ + pci_flags = flags; +} + +static inline void pci_add_flags(int flags) +{ + pci_flags |= flags; +} + +static inline int pci_has_flag(int flag) +{ + return pci_flags & flag; +} + +extern struct list_head hose_list; + +extern unsigned long pci_address_to_pio(phys_addr_t address); +extern int pcibios_vaddr_is_ioport(void __iomem *address); +#else +static inline unsigned long pci_address_to_pio(phys_addr_t address) +{ + return (unsigned long)-1; +} +static inline int pcibios_vaddr_is_ioport(void __iomem *address) +{ + return 0; +} + +static inline void pci_set_flags(int flags) { } +static inline void pci_add_flags(int flags) { } +static inline int pci_has_flag(int flag) +{ + return 0; +} +#endif /* CONFIG_PCI */ + +#endif /* __KERNEL__ */ +#endif /* _ASM_MICROBLAZE_PCI_BRIDGE_H */ diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h index 9f0df5faf2c8..bdd65aaee30d 100644 --- a/arch/microblaze/include/asm/pci.h +++ b/arch/microblaze/include/asm/pci.h @@ -1 +1,177 @@ -#include <asm-generic/pci.h> +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Based on powerpc version + */ + +#ifndef __ASM_MICROBLAZE_PCI_H +#define __ASM_MICROBLAZE_PCI_H +#ifdef __KERNEL__ + +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/dma-mapping.h> +#include <linux/pci.h> + +#include <asm/scatterlist.h> +#include <asm/io.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> + +#define PCIBIOS_MIN_IO 0x1000 +#define PCIBIOS_MIN_MEM 0x10000000 + +struct pci_dev; + +/* Values for the `which' argument to sys_pciconfig_iobase syscall. */ +#define IOBASE_BRIDGE_NUMBER 0 +#define IOBASE_MEMORY 1 +#define IOBASE_IO 2 +#define IOBASE_ISA_IO 3 +#define IOBASE_ISA_MEM 4 + +#define pcibios_scan_all_fns(a, b) 0 + +/* + * Set this to 1 if you want the kernel to re-assign all PCI + * bus numbers (don't do that on ppc64 yet !) + */ +#define pcibios_assign_all_busses() \ + (pci_has_flag(PCI_REASSIGN_ALL_BUS)) + +static inline void pcibios_set_master(struct pci_dev *dev) +{ + /* No special bus mastering setup handling */ +} + +static inline void pcibios_penalize_isa_irq(int irq, int active) +{ + /* We don't do dynamic PCI IRQ allocation */ +} + +#ifdef CONFIG_PCI +extern void set_pci_dma_ops(struct dma_map_ops *dma_ops); +extern struct dma_map_ops *get_pci_dma_ops(void); +#else /* CONFIG_PCI */ +#define set_pci_dma_ops(d) +#define get_pci_dma_ops() NULL +#endif + +#ifdef CONFIG_PCI +static inline void pci_dma_burst_advice(struct pci_dev *pdev, + enum pci_dma_burst_strategy *strat, + unsigned long *strategy_parameter) +{ + *strat = PCI_DMA_BURST_INFINITY; + *strategy_parameter = ~0UL; +} +#endif + +extern int pci_domain_nr(struct pci_bus *bus); + +/* Decide whether to display the domain number in /proc */ +extern int pci_proc_domain(struct pci_bus *bus); + +struct vm_area_struct; +/* Map a range of PCI memory or I/O space for a device into user space */ +int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma, + enum pci_mmap_state mmap_state, int write_combine); + +/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */ +#define HAVE_PCI_MMAP 1 + +extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val, + size_t count); +extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val, + size_t count); +extern int pci_mmap_legacy_page_range(struct pci_bus *bus, + struct vm_area_struct *vma, + enum pci_mmap_state mmap_state); + +#define HAVE_PCI_LEGACY 1 + +/* pci_unmap_{page,single} is a nop so... */ +#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) +#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) +#define pci_unmap_addr(PTR, ADDR_NAME) (0) +#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0) +#define pci_unmap_len(PTR, LEN_NAME) (0) +#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) + +/* The PCI address space does equal the physical memory + * address space (no IOMMU). The IDE and SCSI device layers use + * this boolean for bounce buffer decisions. + */ +#define PCI_DMA_BUS_IS_PHYS (1) + +extern void pcibios_resource_to_bus(struct pci_dev *dev, + struct pci_bus_region *region, + struct resource *res); + +extern void pcibios_bus_to_resource(struct pci_dev *dev, + struct resource *res, + struct pci_bus_region *region); + +static inline struct resource *pcibios_select_root(struct pci_dev *pdev, + struct resource *res) +{ + struct resource *root = NULL; + + if (res->flags & IORESOURCE_IO) + root = &ioport_resource; + if (res->flags & IORESOURCE_MEM) + root = &iomem_resource; + + return root; +} + +extern void pcibios_claim_one_bus(struct pci_bus *b); + +extern void pcibios_finish_adding_to_bus(struct pci_bus *bus); + +extern void pcibios_resource_survey(void); + +extern struct pci_controller *init_phb_dynamic(struct device_node *dn); +extern int remove_phb_dynamic(struct pci_controller *phb); + +extern struct pci_dev *of_create_pci_dev(struct device_node *node, + struct pci_bus *bus, int devfn); + +extern void of_scan_pci_bridge(struct device_node *node, + struct pci_dev *dev); + +extern void of_scan_bus(struct device_node *node, struct pci_bus *bus); +extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus); + +extern int pci_read_irq_line(struct pci_dev *dev); + +extern int pci_bus_find_capability(struct pci_bus *bus, + unsigned int devfn, int cap); + +struct file; +extern pgprot_t pci_phys_mem_access_prot(struct file *file, + unsigned long pfn, + unsigned long size, + pgprot_t prot); + +#define HAVE_ARCH_PCI_RESOURCE_TO_USER +extern void pci_resource_to_user(const struct pci_dev *dev, int bar, + const struct resource *rsrc, + resource_size_t *start, resource_size_t *end); + +extern void pcibios_setup_bus_devices(struct pci_bus *bus); +extern void pcibios_setup_bus_self(struct pci_bus *bus); + +/* This part of code was originaly in xilinx-pci.h */ +#ifdef CONFIG_PCI_XILINX +extern void __init xilinx_pci_init(void); +#else +static inline void __init xilinx_pci_init(void) { return; } +#endif + +#endif /* __KERNEL__ */ +#endif /* __ASM_MICROBLAZE_PCI_H */ diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h index 7547f5064560..f44b0d696fe2 100644 --- a/arch/microblaze/include/asm/pgalloc.h +++ b/arch/microblaze/include/asm/pgalloc.h @@ -19,6 +19,7 @@ #include <asm/io.h> #include <asm/page.h> #include <asm/cache.h> +#include <asm/pgtable.h> #define PGDIR_ORDER 0 @@ -111,7 +112,6 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { pte_t *pte; - extern int mem_init_done; extern void *early_get_page(void); if (mem_init_done) { pte = (pte_t *)__get_free_page(GFP_KERNEL | diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index cc3a4dfc3eaa..dd2bb60651c7 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -16,6 +16,10 @@ #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot) +#ifndef __ASSEMBLY__ +extern int mem_init_done; +#endif + #ifndef CONFIG_MMU #define pgd_present(pgd) (1) /* pages are always present on non MMU */ @@ -51,6 +55,8 @@ static inline int pte_file(pte_t pte) { return 0; } #define arch_enter_lazy_cpu_mode() do {} while (0) +#define pgprot_noncached_wc(prot) prot + #else /* CONFIG_MMU */ #include <asm-generic/4level-fixup.h> @@ -68,7 +74,6 @@ static inline int pte_file(pte_t pte) { return 0; } extern unsigned long va_to_phys(unsigned long address); extern pte_t *va_to_pte(unsigned long address); -extern unsigned long ioremap_bot, ioremap_base; /* * The following only work if pte_present() is true. @@ -85,11 +90,25 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; } #define VMALLOC_START (CONFIG_KERNEL_START + \ max(32 * 1024 * 1024UL, memory_size)) #define VMALLOC_END ioremap_bot -#define VMALLOC_VMADDR(x) ((unsigned long)(x)) #endif /* __ASSEMBLY__ */ /* + * Macro to mark a page protection value as "uncacheable". + */ + +#define _PAGE_CACHE_CTL (_PAGE_GUARDED | _PAGE_NO_CACHE | \ + _PAGE_WRITETHRU) + +#define pgprot_noncached(prot) \ + (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \ + _PAGE_NO_CACHE | _PAGE_GUARDED)) + +#define pgprot_noncached_wc(prot) \ + (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \ + _PAGE_NO_CACHE)) + +/* * The MicroBlaze MMU is identical to the PPC-40x MMU, and uses a hash * table containing PTEs, together with a set of 16 segment registers, to * define the virtual to physical address mapping. @@ -397,7 +416,7 @@ static inline unsigned long pte_update(pte_t *p, unsigned long clr, mts rmsr, %2\n\ nop" : "=&r" (old), "=&r" (tmp), "=&r" (msr), "=m" (*p) - : "r" ((unsigned long)(p+1) - 4), "r" (clr), "r" (set), "m" (*p) + : "r" ((unsigned long)(p + 1) - 4), "r" (clr), "r" (set), "m" (*p) : "cc"); return old; @@ -566,18 +585,11 @@ void mapin_ram(void); int map_page(unsigned long va, phys_addr_t pa, int flags); extern int mem_init_done; -extern unsigned long ioremap_base; -extern unsigned long ioremap_bot; asmlinkage void __init mmu_init(void); void __init *early_get_page(void); -void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle); -void consistent_free(void *vaddr); -void consistent_sync(void *vaddr, size_t size, int direction); -void consistent_sync_page(struct page *page, unsigned long offset, - size_t size, int direction); #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ @@ -586,6 +598,14 @@ void consistent_sync_page(struct page *page, unsigned long offset, #ifndef __ASSEMBLY__ #include <asm-generic/pgtable.h> +extern unsigned long ioremap_bot, ioremap_base; + +void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle); +void consistent_free(void *vaddr); +void consistent_sync(void *vaddr, size_t size, int direction); +void consistent_sync_page(struct page *page, unsigned long offset, + size_t size, int direction); + void setup_memory(void); #endif /* __ASSEMBLY__ */ diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index 563c6b9453f0..8eeb09211ece 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -14,7 +14,6 @@ #include <asm/ptrace.h> #include <asm/setup.h> #include <asm/registers.h> -#include <asm/segment.h> #include <asm/entry.h> #include <asm/current.h> diff --git a/arch/microblaze/include/asm/prom.h b/arch/microblaze/include/asm/prom.h index 03f45a963204..e7d67a329bd7 100644 --- a/arch/microblaze/include/asm/prom.h +++ b/arch/microblaze/include/asm/prom.h @@ -31,6 +31,21 @@ /* Other Prototypes */ extern int early_uartlite_console(void); +#ifdef CONFIG_PCI +/* + * PCI <-> OF matching functions + * (XXX should these be here?) + */ +struct pci_bus; +struct pci_dev; +extern int pci_device_from_OF_node(struct device_node *node, + u8 *bus, u8 *devfn); +extern struct device_node *pci_busdev_to_OF_node(struct pci_bus *bus, + int devfn); +extern struct device_node *pci_device_to_OF_node(struct pci_dev *dev); +extern void pci_create_OF_bus_map(void); +#endif + /* * OF address retreival & translation */ diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h deleted file mode 100644 index 0e7102c3fb11..000000000000 --- a/arch/microblaze/include/asm/segment.h +++ /dev/null @@ -1,49 +0,0 @@ -/* - * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2008-2009 PetaLogix - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#ifndef _ASM_MICROBLAZE_SEGMENT_H -#define _ASM_MICROBLAZE_SEGMENT_H - -# ifndef __ASSEMBLY__ - -typedef struct { - unsigned long seg; -} mm_segment_t; - -/* - * On Microblaze the fs value is actually the top of the corresponding - * address space. - * - * The fs value determines whether argument validity checking should be - * performed or not. If get_fs() == USER_DS, checking is performed, with - * get_fs() == KERNEL_DS, checking is bypassed. - * - * For historical reasons, these macros are grossly misnamed. - * - * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal. - */ -# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) - -# ifndef CONFIG_MMU -# define KERNEL_DS MAKE_MM_SEG(0) -# define USER_DS KERNEL_DS -# else -# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF) -# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) -# endif - -# define get_ds() (KERNEL_DS) -# define get_fs() (current_thread_info()->addr_limit) -# define set_fs(val) (current_thread_info()->addr_limit = (val)) - -# define segment_eq(a, b) ((a).seg == (b).seg) - -# endif /* __ASSEMBLY__ */ -#endif /* _ASM_MICROBLAZE_SEGMENT_H */ diff --git a/arch/microblaze/include/asm/system.h b/arch/microblaze/include/asm/system.h index 157970688b2a..59efb3fef957 100644 --- a/arch/microblaze/include/asm/system.h +++ b/arch/microblaze/include/asm/system.h @@ -87,6 +87,9 @@ void free_initmem(void); extern char *klimit; extern void ret_from_fork(void); +extern void *alloc_maybe_bootmem(size_t size, gfp_t mask); +extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); + #ifdef CONFIG_DEBUG_FS extern struct dentry *of_debugfs_root; #endif diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h index 6e92885d381a..b2ca80f64640 100644 --- a/arch/microblaze/include/asm/thread_info.h +++ b/arch/microblaze/include/asm/thread_info.h @@ -19,7 +19,6 @@ #ifndef __ASSEMBLY__ # include <linux/types.h> # include <asm/processor.h> -# include <asm/segment.h> /* * low level task data that entry.S needs immediate access to @@ -60,6 +59,10 @@ struct cpu_context { __u32 fsr; }; +typedef struct { + unsigned long seg; +} mm_segment_t; + struct thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ diff --git a/arch/microblaze/include/asm/tlbflush.h b/arch/microblaze/include/asm/tlbflush.h index 10ec70cd8735..2e1353c2d18d 100644 --- a/arch/microblaze/include/asm/tlbflush.h +++ b/arch/microblaze/include/asm/tlbflush.h @@ -23,7 +23,8 @@ extern void _tlbie(unsigned long address); extern void _tlbia(void); -#define __tlbia() _tlbia() +#define __tlbia() { preempt_disable(); _tlbia(); preempt_enable(); } +#define __tlbie(x) { _tlbie(x); } static inline void local_flush_tlb_all(void) { __tlbia(); } @@ -31,7 +32,7 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm) { __tlbia(); } static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr) - { _tlbie(vmaddr); } + { __tlbie(vmaddr); } static inline void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { __tlbia(); } diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h index 371bd6e56d9a..446bec29b142 100644 --- a/arch/microblaze/include/asm/uaccess.h +++ b/arch/microblaze/include/asm/uaccess.h @@ -22,101 +22,73 @@ #include <asm/mmu.h> #include <asm/page.h> #include <asm/pgtable.h> -#include <asm/segment.h> #include <linux/string.h> #define VERIFY_READ 0 #define VERIFY_WRITE 1 -#define __clear_user(addr, n) (memset((void *)(addr), 0, (n)), 0) - -#ifndef CONFIG_MMU - -extern int ___range_ok(unsigned long addr, unsigned long size); - -#define __range_ok(addr, size) \ - ___range_ok((unsigned long)(addr), (unsigned long)(size)) - -#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0) -#define __access_ok(add, size) (__range_ok((addr), (size)) == 0) - -/* Undefined function to trigger linker error */ -extern int bad_user_access_length(void); - -/* FIXME this is function for optimalization -> memcpy */ -#define __get_user(var, ptr) \ -({ \ - int __gu_err = 0; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - case 2: \ - case 4: \ - (var) = *(ptr); \ - break; \ - case 8: \ - memcpy((void *) &(var), (ptr), 8); \ - break; \ - default: \ - (var) = 0; \ - __gu_err = __get_user_bad(); \ - break; \ - } \ - __gu_err; \ -}) +/* + * On Microblaze the fs value is actually the top of the corresponding + * address space. + * + * The fs value determines whether argument validity checking should be + * performed or not. If get_fs() == USER_DS, checking is performed, with + * get_fs() == KERNEL_DS, checking is bypassed. + * + * For historical reasons, these macros are grossly misnamed. + * + * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal. + */ +# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) -#define __get_user_bad() (bad_user_access_length(), (-EFAULT)) +# ifndef CONFIG_MMU +# define KERNEL_DS MAKE_MM_SEG(0) +# define USER_DS KERNEL_DS +# else +# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF) +# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) +# endif -/* FIXME is not there defined __pu_val */ -#define __put_user(var, ptr) \ -({ \ - int __pu_err = 0; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - case 2: \ - case 4: \ - *(ptr) = (var); \ - break; \ - case 8: { \ - typeof(*(ptr)) __pu_val = (var); \ - memcpy(ptr, &__pu_val, sizeof(__pu_val)); \ - } \ - break; \ - default: \ - __pu_err = __put_user_bad(); \ - break; \ - } \ - __pu_err; \ -}) +# define get_ds() (KERNEL_DS) +# define get_fs() (current_thread_info()->addr_limit) +# define set_fs(val) (current_thread_info()->addr_limit = (val)) -#define __put_user_bad() (bad_user_access_length(), (-EFAULT)) +# define segment_eq(a, b) ((a).seg == (b).seg) -#define put_user(x, ptr) __put_user((x), (ptr)) -#define get_user(x, ptr) __get_user((x), (ptr)) +/* + * The exception table consists of pairs of addresses: the first is the + * address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out + * what to do. + * + * All the routines below use bits of fixup code that are out of line + * with the main instruction path. This means when everything is well, + * we don't even have to jump over them. Further, they do not intrude + * on our cache or tlb entries. + */ +struct exception_table_entry { + unsigned long insn, fixup; +}; -#define copy_to_user(to, from, n) (memcpy((to), (from), (n)), 0) -#define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0) +/* Returns 0 if exception not found and fixup otherwise. */ +extern unsigned long search_exception_table(unsigned long); -#define __copy_to_user(to, from, n) (copy_to_user((to), (from), (n))) -#define __copy_from_user(to, from, n) (copy_from_user((to), (from), (n))) -#define __copy_to_user_inatomic(to, from, n) \ - (__copy_to_user((to), (from), (n))) -#define __copy_from_user_inatomic(to, from, n) \ - (__copy_from_user((to), (from), (n))) +#ifndef CONFIG_MMU -static inline unsigned long clear_user(void *addr, unsigned long size) +/* Check against bounds of physical memory */ +static inline int ___range_ok(unsigned long addr, unsigned long size) { - if (access_ok(VERIFY_WRITE, addr, size)) - size = __clear_user(addr, size); - return size; + return ((addr < memory_start) || + ((addr + size) > memory_end)); } -/* Returns 0 if exception not found and fixup otherwise. */ -extern unsigned long search_exception_table(unsigned long); +#define __range_ok(addr, size) \ + ___range_ok((unsigned long)(addr), (unsigned long)(size)) -extern long strncpy_from_user(char *dst, const char *src, long count); -extern long strnlen_user(const char *src, long count); +#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0) -#else /* CONFIG_MMU */ +#else /* * Address is valid if: @@ -129,24 +101,88 @@ extern long strnlen_user(const char *src, long count); /* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n", type?"WRITE":"READ",addr,size,get_fs().seg)) */ -/* - * All the __XXX versions macros/functions below do not perform - * access checking. It is assumed that the necessary checks have been - * already performed before the finction (macro) is called. - */ +#endif -#define get_user(x, ptr) \ -({ \ - access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \ - ? __get_user((x), (ptr)) : -EFAULT; \ -}) +#ifdef CONFIG_MMU +# define __FIXUP_SECTION ".section .fixup,\"ax\"\n" +# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n" +#else +# define __FIXUP_SECTION ".section .discard,\"ax\"\n" +# define __EX_TABLE_SECTION ".section .discard,\"a\"\n" +#endif -#define put_user(x, ptr) \ -({ \ - access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \ - ? __put_user((x), (ptr)) : -EFAULT; \ +extern unsigned long __copy_tofrom_user(void __user *to, + const void __user *from, unsigned long size); + +/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */ +static inline unsigned long __must_check __clear_user(void __user *to, + unsigned long n) +{ + /* normal memset with two words to __ex_table */ + __asm__ __volatile__ ( \ + "1: sb r0, %2, r0;" \ + " addik %0, %0, -1;" \ + " bneid %0, 1b;" \ + " addik %2, %2, 1;" \ + "2: " \ + __EX_TABLE_SECTION \ + ".word 1b,2b;" \ + ".previous;" \ + : "=r"(n) \ + : "0"(n), "r"(to) + ); + return n; +} + +static inline unsigned long __must_check clear_user(void __user *to, + unsigned long n) +{ + might_sleep(); + if (unlikely(!access_ok(VERIFY_WRITE, to, n))) + return n; + + return __clear_user(to, n); +} + +/* put_user and get_user macros */ +extern long __user_bad(void); + +#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ +({ \ + __asm__ __volatile__ ( \ + "1:" insn " %1, %2, r0;" \ + " addk %0, r0, r0;" \ + "2: " \ + __FIXUP_SECTION \ + "3: brid 2b;" \ + " addik %0, r0, %3;" \ + ".previous;" \ + __EX_TABLE_SECTION \ + ".word 1b,3b;" \ + ".previous;" \ + : "=&r"(__gu_err), "=r"(__gu_val) \ + : "r"(__gu_ptr), "i"(-EFAULT) \ + ); \ }) +/** + * get_user: - Get a simple variable from user space. + * @x: Variable to store result. + * @ptr: Source address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple variable from user space to kernel + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and the result of + * dereferencing @ptr must be assignable to @x without a cast. + * + * Returns zero on success, or -EFAULT on error. + * On error, the variable @x is set to zero. + */ + #define __get_user(x, ptr) \ ({ \ unsigned long __gu_val; \ @@ -163,30 +199,74 @@ extern long strnlen_user(const char *src, long count); __get_user_asm("lw", (ptr), __gu_val, __gu_err); \ break; \ default: \ - __gu_val = 0; __gu_err = -EINVAL; \ + /* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\ } \ x = (__typeof__(*(ptr))) __gu_val; \ __gu_err; \ }) -#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ + +#define get_user(x, ptr) \ ({ \ - __asm__ __volatile__ ( \ - "1:" insn " %1, %2, r0; \ - addk %0, r0, r0; \ - 2: \ - .section .fixup,\"ax\"; \ - 3: brid 2b; \ - addik %0, r0, %3; \ - .previous; \ - .section __ex_table,\"a\"; \ - .word 1b,3b; \ - .previous;" \ - : "=r"(__gu_err), "=r"(__gu_val) \ - : "r"(__gu_ptr), "i"(-EFAULT) \ - ); \ + access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \ + ? __get_user((x), (ptr)) : -EFAULT; \ +}) + +#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ +({ \ + __asm__ __volatile__ ( \ + "1:" insn " %1, %2, r0;" \ + " addk %0, r0, r0;" \ + "2: " \ + __FIXUP_SECTION \ + "3: brid 2b;" \ + " addik %0, r0, %3;" \ + ".previous;" \ + __EX_TABLE_SECTION \ + ".word 1b,3b;" \ + ".previous;" \ + : "=&r"(__gu_err) \ + : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \ + ); \ }) +#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \ +({ \ + __asm__ __volatile__ (" lwi %0, %1, 0;" \ + "1: swi %0, %2, 0;" \ + " lwi %0, %1, 4;" \ + "2: swi %0, %2, 4;" \ + " addk %0, r0, r0;" \ + "3: " \ + __FIXUP_SECTION \ + "4: brid 3b;" \ + " addik %0, r0, %3;" \ + ".previous;" \ + __EX_TABLE_SECTION \ + ".word 1b,4b,2b,4b;" \ + ".previous;" \ + : "=&r"(__gu_err) \ + : "r"(&__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \ + ); \ +}) + +/** + * put_user: - Write a simple value into user space. + * @x: Value to copy to user space. + * @ptr: Destination address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple value from kernel space to user + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and @x must be assignable + * to the result of dereferencing @ptr. + * + * Returns zero on success, or -EFAULT on error. + */ + #define __put_user(x, ptr) \ ({ \ __typeof__(*(ptr)) volatile __gu_val = (x); \ @@ -195,7 +275,7 @@ extern long strnlen_user(const char *src, long count); case 1: \ __put_user_asm("sb", (ptr), __gu_val, __gu_err); \ break; \ - case 2: \ + case 2: \ __put_user_asm("sh", (ptr), __gu_val, __gu_err); \ break; \ case 4: \ @@ -205,121 +285,82 @@ extern long strnlen_user(const char *src, long count); __put_user_asm_8((ptr), __gu_val, __gu_err); \ break; \ default: \ - __gu_err = -EINVAL; \ + /*__gu_err = -EINVAL;*/ __gu_err = __user_bad(); \ } \ __gu_err; \ }) -#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \ -({ \ -__asm__ __volatile__ (" lwi %0, %1, 0; \ - 1: swi %0, %2, 0; \ - lwi %0, %1, 4; \ - 2: swi %0, %2, 4; \ - addk %0,r0,r0; \ - 3: \ - .section .fixup,\"ax\"; \ - 4: brid 3b; \ - addik %0, r0, %3; \ - .previous; \ - .section __ex_table,\"a\"; \ - .word 1b,4b,2b,4b; \ - .previous;" \ - : "=&r"(__gu_err) \ - : "r"(&__gu_val), \ - "r"(__gu_ptr), "i"(-EFAULT) \ - ); \ -}) +#ifndef CONFIG_MMU -#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ -({ \ - __asm__ __volatile__ ( \ - "1:" insn " %1, %2, r0; \ - addk %0, r0, r0; \ - 2: \ - .section .fixup,\"ax\"; \ - 3: brid 2b; \ - addik %0, r0, %3; \ - .previous; \ - .section __ex_table,\"a\"; \ - .word 1b,3b; \ - .previous;" \ - : "=r"(__gu_err) \ - : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \ - ); \ -}) +#define put_user(x, ptr) __put_user((x), (ptr)) -/* - * Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. - */ -static inline int clear_user(char *to, int size) -{ - if (size && access_ok(VERIFY_WRITE, to, size)) { - __asm__ __volatile__ (" \ - 1: \ - sb r0, %2, r0; \ - addik %0, %0, -1; \ - bneid %0, 1b; \ - addik %2, %2, 1; \ - 2: \ - .section __ex_table,\"a\"; \ - .word 1b,2b; \ - .section .text;" \ - : "=r"(size) \ - : "0"(size), "r"(to) - ); - } - return size; -} +#else /* CONFIG_MMU */ -#define __copy_from_user(to, from, n) copy_from_user((to), (from), (n)) +#define put_user(x, ptr) \ +({ \ + access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \ + ? __put_user((x), (ptr)) : -EFAULT; \ +}) +#endif /* CONFIG_MMU */ + +/* copy_to_from_user */ +#define __copy_from_user(to, from, n) \ + __copy_tofrom_user((__force void __user *)(to), \ + (void __user *)(from), (n)) #define __copy_from_user_inatomic(to, from, n) \ copy_from_user((to), (from), (n)) -#define copy_to_user(to, from, n) \ - (access_ok(VERIFY_WRITE, (to), (n)) ? \ - __copy_tofrom_user((void __user *)(to), \ - (__force const void __user *)(from), (n)) \ - : -EFAULT) +static inline long copy_from_user(void *to, + const void __user *from, unsigned long n) +{ + might_sleep(); + if (access_ok(VERIFY_READ, from, n)) + return __copy_from_user(to, from, n); + return n; +} -#define __copy_to_user(to, from, n) copy_to_user((to), (from), (n)) +#define __copy_to_user(to, from, n) \ + __copy_tofrom_user((void __user *)(to), \ + (__force const void __user *)(from), (n)) #define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n)) -#define copy_from_user(to, from, n) \ - (access_ok(VERIFY_READ, (from), (n)) ? \ - __copy_tofrom_user((__force void __user *)(to), \ - (void __user *)(from), (n)) \ - : -EFAULT) +static inline long copy_to_user(void __user *to, + const void *from, unsigned long n) +{ + might_sleep(); + if (access_ok(VERIFY_WRITE, to, n)) + return __copy_to_user(to, from, n); + return n; +} +/* + * Copy a null terminated string from userspace. + */ extern int __strncpy_user(char *to, const char __user *from, int len); -extern int __strnlen_user(const char __user *sstr, int len); -#define strncpy_from_user(to, from, len) \ - (access_ok(VERIFY_READ, from, 1) ? \ - __strncpy_user(to, from, len) : -EFAULT) -#define strnlen_user(str, len) \ - (access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0) +#define __strncpy_from_user __strncpy_user -#endif /* CONFIG_MMU */ - -extern unsigned long __copy_tofrom_user(void __user *to, - const void __user *from, unsigned long size); +static inline long +strncpy_from_user(char *dst, const char __user *src, long count) +{ + if (!access_ok(VERIFY_READ, src, 1)) + return -EFAULT; + return __strncpy_from_user(dst, src, count); +} /* - * The exception table consists of pairs of addresses: the first is the - * address of an instruction that is allowed to fault, and the second is - * the address at which the program should continue. No registers are - * modified, so it is entirely up to the continuation code to figure out - * what to do. + * Return the size of a string (including the ending 0) * - * All the routines below use bits of fixup code that are out of line - * with the main instruction path. This means when everything is well, - * we don't even have to jump over them. Further, they do not intrude - * on our cache or tlb entries. + * Return 0 on exception, a value greater than N if too long */ -struct exception_table_entry { - unsigned long insn, fixup; -}; +extern int __strnlen_user(const char __user *sstr, int len); + +static inline long strnlen_user(const char __user *src, long n) +{ + if (!access_ok(VERIFY_READ, src, 1)) + return 0; + return __strnlen_user(src, n); +} #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ |