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2018-03-16nds32: To use the generic dump_stack()Greentime Hu1-12/+0
Use the generic dump_stack() instead of nds32 one because they are doing the same thing. Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-03-16nds32: fix building failed if using elf toolchain.Greentime Hu1-1/+0
OUTPUT_FORMAT is not necessary here and the elf toolchain doesn't support these formats. Since kernel should be built pass with elf or Linux toolchain. This can be removed from vdso.ld.S These are the built failed messages. VDSOL arch/nds32/kernel/vdso/vdso.so.dbg /home/users/greentime/tmp/nds32le-elf-newlib-v3-upstream-b224/bin/../lib/gcc/nds32le-elf/8.0.1/../../../../nds32le-elf/bin/ld: target elf32-nds32le-linux not found collect2: error: ld returned 1 exit status make[1]: *** [arch/nds32/kernel/vdso/vdso.so.dbg] Error 1 make: *** [vdso_prepare] Error 2 Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-02-22nds32: Build infrastructureGreentime Hu2-0/+80
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: Device tree supportGreentime Hu1-0/+19
This patch adds support for device tree. 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: Generic timers supportGreentime Hu1-0/+11
This patch adds support for timer. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22nds32: Loadable modulesGreentime Hu1-0/+278
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/+64
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/+119
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 Hu1-0/+31
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/+324
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 Hu9-0/+742
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 Hu3-0/+165
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: DMA mapping APIGreentime Hu1-0/+477
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: IRQ handlingGreentime Hu1-0/+9
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 Hu1-0/+208
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 Hu1-0/+49
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: Exception handlingGreentime Hu4-0/+830
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: Kernel booting and initializationGreentime Hu2-0/+551
This patch includes the kernel startup code. It can get dtb pointer passed from bootloader. It will create a temp mapping by tlb instructions at beginning and goto start_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: Assembly macros and definitionsGreentime Hu1-0/+28
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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