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2018-04-11page cache: use xa_lockMatthew Wilcox1-2/+2
Remove the address_space ->tree_lock and use the xa_lock newly added to the radix_tree_root. Rename the address_space ->page_tree to ->i_pages, since we don't really care that it's a tree. [willy@infradead.org: fix nds32, fs/dax.c] Link: http://lkml.kernel.org/r/20180406145415.GB20605@bombadil.infradead.orgLink: http://lkml.kernel.org/r/20180313132639.17387-9-willy@infradead.org Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Acked-by: Jeff Layton <jlayton@redhat.com> Cc: Darrick J. Wong <darrick.wong@oracle.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-22nds32: Build infrastructureGreentime Hu2-0/+84
This patch adds Makefile, Kconfig and vmlinux.lds.S files required for building an nds32 kernel. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Miscellaneous header filesGreentime Hu3-0/+63
This patch introduces some miscellaneous header files. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Loadable modulesGreentime Hu1-0/+11
This patch adds support for loadable modules. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: L2 cache supportGreentime Hu1-0/+137
This patch adds L2 cache support. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Debugging supportGreentime Hu1-0/+25
This patch adds ptrace support. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Library functionsGreentime Hu3-0/+335
This patch add support for various library functions. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Signal handling supportGreentime Hu1-0/+60
This patch adds support for signal handling. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-02-22nds32: VDSO supportGreentime Hu3-0/+74
This patch adds VDSO support. The VDSO code is currently used for sys_rt_sigreturn() and optimised gettimeofday() (using the SoC timer counter). Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: System calls handlingGreentime Hu4-0/+218
This patch adds support for system calls. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: ELF definitionsGreentime Hu3-0/+194
This patch adds definitions for the ELF format, relocation types, vdso locations and EXEC_PAGESIZE. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: DMA mapping APIGreentime Hu1-0/+14
This patch adds support for the DMA mapping API. It uses dma_map_ops for flexibility. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Device specific operationsGreentime Hu1-0/+83
This patch introduces ioremap implementations. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Atomic operationsGreentime Hu2-0/+118
This patch includes the atomic and futex operations. Many atomic operations use the load-lock word(llw) and store-condition word(scw) operations. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: IRQ handlingGreentime Hu1-0/+36
This patch includes irq related functions and irqchip_init(). Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Process managementGreentime Hu3-0/+191
This patch includes copy_thread(), start_thread() implementation and cpu_context structure definition. nds32 uses $r25 to get current task_struct. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Cache and TLB routinesGreentime Hu8-0/+270
This patch contains cache and TLB maintenance functions. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: MMU definitionsGreentime Hu8-0/+802
This patch includes virtual memory layout, PHYS_OFFSET is defined as 0x0. It also includes the 4KB/8KB page size configurations and pte operations. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Exception handlingGreentime Hu1-0/+77
This patch includes the exception/interrupt entries, pt_reg structure and related accessors. /* Unaligned accessing handling*/ Andes processors cannot load/store information which is not naturally aligned on the bus, i.e., loading a 4 byte data whose start address must be divisible by 4. If unaligned data accessing is happened, data unaligned exception will be triggered and user will get SIGSEGV or kernel oops according to the unaligned address. In order to make user be able to load/store data from an unaligned address, software load/store emulation is implemented in arch/nds32/mm/alignment.c to address data unaligned exception. Unaligned accessing handling is disabled by default because it is not a normal case. User can enable this feature by following steps. A. Compile time: 1. Enable kernel config CONFIG_ALIGNMENT_TRAP B. Run time: 1. Enter /proc/sys/nds32/unaligned_acess folder 2. Write 1 to file enable_mode to enable unaligned accessing handling. User can disable it by writing 0 to this file. 3. Write 1 to file debug to show which unaligned address is under processing. User can disable it by writing 0 to this file. However, unaligned accessing handler cannot work if this unaligned address is not accessible such as protection violation. On this condition, the default behaviors for addressing data unaligned exception still happen Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Assembly macros and definitionsGreentime Hu3-0/+1083
This patch includes assembly macros, bit field definitions used in .S files across arch/nds32/. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
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