linux.git/arch/xtensa/Kconfig, branch master

xtensa: enable HAVE_DMA_CONTIGUOUS

2016-12-15T18:41:50+00:00

Enable HAVE_DMA_CONTIGUOUS, reserve contiguous memory at bootmem_init, use dma_alloc_from_contiguous and dma_release_from_contiguous in xtensa_dma_alloc/free. This allows for big contiguous DMA buffer allocation from designated area configured in the device tree. Signed-off-by: Max Filippov

xtensa: disable MMU initialization option on MMUv2 cores

2016-09-29T19:55:00+00:00

MMU initialization option is currently ignored on MMUv2 cores, but it is used in Kconfig to select kernel load and start addresses. This choice is not available for MMUv2 cores as they have hardwired TLB entries. Disable MMU initialization option for known MMUv2 cores so that they get correct kernel load/start address by default. This fixes the default allmodconfig build. Signed-off-by: Max Filippov

xtensa: fix default kernel load address

2016-09-10T01:38:35+00:00

Make default kernel load address 0xd0003000 for MMUv2 cores and 0x60003000 for noMMU cores. Don't initialize MMU inside vmlinux for predefined MMUv2 cores (it's noop anyway). This fixes the following defconfig build error: arch/xtensa/kernel/built-in.o: In function `fast_alloca': (.text+0x99a): dangerous relocation: j: cannot encode: _WindowUnderflow12 arch/xtensa/kernel/built-in.o: In function `fast_alloca': (.text+0x99d): dangerous relocation: j: cannot encode: _WindowUnderflow8 arch/xtensa/kernel/built-in.o: In function `fast_alloca': (.text+0x9a0): dangerous relocation: j: cannot encode: _WindowUnderflow4 arch/xtensa/kernel/built-in.o: In function `window_overflow_restore_a0_fixup': (.text+0x23a3): dangerous relocation: j: cannot encode: (.DoubleExceptionVector.text+0x104) arch/xtensa/kernel/built-in.o: In function `window_overflow_restore_a0_fixup': (.text+0x23c1): dangerous relocation: j: cannot encode: (.DoubleExceptionVector.text+0x104) arch/xtensa/kernel/built-in.o: In function `window_overflow_restore_a0_fixup': (.text+0x23dd): dangerous relocation: j: cannot encode: (.DoubleExceptionVector.text+0x104) With this change all xtensa defconfigs build correctly. Reported-by: Guenter Roeck Signed-off-by: Max Filippov

xtensa: support reserved-memory DT node

2016-07-24T03:34:00+00:00

This allows reserving regions of physical memory from the device tree. See Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt for more details. Signed-off-by: Max Filippov

xtensa: drop sysmem and switch to memblock

2016-07-24T03:34:00+00:00

Memblock is the standard kernel boot-time memory tracker/allocator. Use it instead of the custom sysmem allocator. This allows using kmemleak, CMA and device tree memory reservation. Signed-off-by: Max Filippov

xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE}

2016-07-24T03:33:59+00:00

Now that the kernel load address and KSEG physical base address have their own Kconfig symbols PLATFORM_DEFAULT_MEM seems redundant. It makes little sense to use it in MMU configurations instead of KSEG_PADDR. In noMMU configurations there's no explicit KSEG, so it's still useful for the early cache initialization and definition of ARCH_PFN_OFFSET, which affects mem_map size. - limit it to noMMU; MMU variants have XCHAL_KSEG_PADDR and XCHAL_KSEG_SIZE; - don't use it to define TASK_SIZE or MAX_LOW_PFN: first doesn't make any difference in noMMU, second is meaningless as there's no high memory; - don't add default physical memory region: memory layout should come from the DT, bootloader tags, or memmap= command line parameter. Signed-off-by: Max Filippov

xtensa: cleanup MMU setup and kernel layout macros

2016-07-24T03:33:58+00:00

Make kernel load address explicit, independent of the selected MMU configuration and configurable from Kconfig. Do not restrict it to the first 512MB of the physical address space. Cleanup kernel memory layout macros: - rename VECBASE_RESET_VADDR to VECBASE_VADDR, XC_VADDR to VECTOR_VADDR; - drop VIRTUAL_MEMORY_ADDRESS and LOAD_MEMORY_ADDRESS; - introduce PHYS_OFFSET and use it in __va and __pa definitions; - synchronize MMU/noMMU vectors, drop unused NMI vector; - replace hardcoded vectors offset of 0x3000 with Kconfig symbol. Signed-off-by: Max Filippov

xtensa: add alternative kernel memory layouts

2016-07-24T03:33:58+00:00

MMUv3 is able to support low memory bigger than 128MB. Implement 256MB and 512MB KSEG layouts: - add Kconfig selector for KSEG layout; - add KSEG base address, size and alignment definitions to arch/xtensa/include/asm/kmem_layout.h; - use new definitions in TLB initialization; - add build time memory map consistency checks. See Documentation/xtensa/mmu.txt for the details of new memory layouts. Signed-off-by: Max Filippov

exit_thread: remove empty bodies

2016-05-21T00:58:30+00:00

Define HAVE_EXIT_THREAD for archs which want to do something in exit_thread. For others, let's define exit_thread as an empty inline. This is a cleanup before we change the prototype of exit_thread to accept a task parameter. [akpm@linux-foundation.org: fix mips] Signed-off-by: Jiri Slaby Cc: "David S. Miller" Cc: "H. Peter Anvin" Cc: "James E.J. Bottomley" Cc: Aurelien Jacquiot Cc: Benjamin Herrenschmidt Cc: Catalin Marinas Cc: Chen Liqin Cc: Chris Metcalf Cc: Chris Zankel Cc: David Howells Cc: Fenghua Yu Cc: Geert Uytterhoeven Cc: Guan Xuetao Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ivan Kokshaysky Cc: James Hogan Cc: Jeff Dike Cc: Jesper Nilsson Cc: Jiri Slaby Cc: Jonas Bonn Cc: Koichi Yasutake Cc: Lennox Wu Cc: Ley Foon Tan Cc: Mark Salter Cc: Martin Schwidefsky Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Mikael Starvik Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Ralf Baechle Cc: Rich Felker Cc: Richard Henderson Cc: Richard Kuo Cc: Richard Weinberger Cc: Russell King Cc: Steven Miao Cc: Thomas Gleixner Cc: Tony Luck Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

xtensa: remove ARCH_WANT_OPTIONAL_GPIOLIB

2016-04-26T11:59:33+00:00

This symbols is not needed to get access to selecting the GPIOLIB anymore: any arch can select GPIOLIB. Cc: Michael Büsch Cc: Chris Zankel Cc: linux-xtensa@linux-xtensa.org Acked-by: Max Filippov Signed-off-by: Linus Walleij