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* Merge tag 'xtensa-20200206' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2020-02-071-2/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull xtensa updates from Max Filippov: - reorganize exception vectors placement - small cleanups (drop unused functions/headers/defconfig entries, spelling fixes) * tag 'xtensa-20200206' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: ISS: improve simcall assembly xtensa: reorganize vectors placement xtensa: separate SMP and XIP support xtensa: move fast exception handlers close to vectors arch/xtensa: fix Kconfig typos for HAVE_SMP xtensa: clean up optional XCHAL_* definitions xtensa: drop unused function fast_coprocessor_double xtensa: drop empty platform_* functions from platforms xtensa: clean up platform headers xtensa: drop set_except_vector declaration xtensa: configs: Cleanup old Kconfig IO scheduler options
| * xtensa: reorganize vectors placementMax Filippov2020-02-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow vectors to be either merged into the kernel .text or put at a fixed virtual address independently of XIP option. Drop option that puts vectors at a fixed offset from the kernel text. Add choice to Kconfig. Vectors at fixed virtual address may be useful for XIP-aware MTD support and for noMMU configurations with available IRAM. Configurations without VECBASE register must put their vectors at specific locations regardless of the selected option. All other configurations should happily use merged vectors. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: move fast exception handlers close to vectorsMax Filippov2020-02-041-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | On XIP kernels it makes sense to have exception vectors and fast exception handlers together (in a fast memory). In addition, with MTD XIP support both vectors and fast exception handlers must be outside of the FLASH. Add section .exception.text and move fast exception handlers to it. Put it together with vectors when vectors are outside of the .text. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | arch/xtensa/setup: Drop dummy_con initializationArvind Sankar2020-01-141-2/+0
|/ | | | | | | | | con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset. Drop it from arch setup code. Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Link: https://lore.kernel.org/r/20191218214506.49252-25-nivedita@alum.mit.edu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* xtensa: add XIP kernel supportMax Filippov2019-11-261-0/+7
| | | | | | | | | | | | | | | | | | XIP (eXecute In Place) kernel image is the image that can be run directly from ROM, using RAM only for writable data. XIP xtensa kernel differs from regular xtensa kernel in the following ways: - it has exception/IRQ vectors merged into text section. No vectors relocation takes place at kernel startup. - .data/.bss location must be specified in the kernel configuration, its content is copied there in the _startup function. - .init.text is merged with the rest of text and is executed from ROM. - when MMU is used the virtual address where the kernel will be mapped must be specified in the kernel configuration. It may be in the KSEG or in the KIO, __pa macro is adjusted to be able to handle both. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: remove free_initrd_memMike Rapoport2019-08-261-6/+3
| | | | | | | | | | | | | | | The xtensa free_initrd_mem() verifies that initrd is mapped and then frees its memory using free_reserved_area(). The initrd is considered mapped when its memory was successfully reserved with mem_reserve(). Resetting initrd_start to 0 in case of mem_reserve() failure allows to switch to generic free_initrd_mem() implementation. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Message-Id: <1563977432-8376-1-git-send-email-rppt@linux.ibm.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: add missing isync to the cpu_reset TLB codeMax Filippov2019-08-121-0/+1
| | | | | | | | | | ITLB entry modifications must be followed by the isync instruction before the new entries are possibly used. cpu_reset lacks one isync between ITLB way 6 initialization and jump to the identity mapping. Add missing isync to xtensa cpu_reset. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: drop dead PCI support codeMax Filippov2019-06-161-4/+0
| | | | | | | | | | | | | | xtensa-specific PCI initialization code has significantly bitrotted over time because there's no platform that use it. Get rid of remaining non-functioning initialization and remove platform_pcibios_* interface. A new platform that would use PCI on xtensa will configure PCI controller using device tree. Drop variables pci_ctrl_head, pci_bus_count and functions pcibios_init, pci_controller_apertures, platform_pcibios_init and platform_pcibios_fixup. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: Fix section mismatch between memblock_reserve and mem_reserveGuenter Roeck2019-05-301-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | Since commit 9012d011660ea5cf2 ("compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING"), xtensa:tinyconfig fails to build with section mismatch errors. WARNING: vmlinux.o(.text.unlikely+0x68): Section mismatch in reference from the function ___pa() to the function .meminit.text:memblock_reserve() WARNING: vmlinux.o(.text.unlikely+0x74): Section mismatch in reference from the function mem_reserve() to the function .meminit.text:memblock_reserve() FATAL: modpost: Section mismatches detected. This was not seen prior to the above mentioned commit because mem_reserve() was always inlined. Mark mem_reserve(() as __init_memblock to have it reside in the same section as memblock_reserve(). Signed-off-by: Guenter Roeck <linux@roeck-us.net> Message-Id: <1559220098-9955-1-git-send-email-linux@roeck-us.net> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: add exclusive atomics supportMax Filippov2019-05-071-0/+3
| | | | | | | | | Implement atomic primitives using exclusive access opcodes available in the recent xtensa cores. Since l32ex/s32ex don't have any memory ordering guarantees don't define __smp_mb__before_atomic/__smp_mb__after_atomic to make them use memw. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: clean up WSR*/RSR*/get_sr/set_srMax Filippov2018-12-041-4/+4
| | | | | | | | | WSR and RSR are too generic and collide with other macro definitions in the kernel causing warnings in allmodconfig builds. Drop WSR and RSR macros and WSR_* and RSR_* variants. Change get_sr and set_sr to xtensa_get_sr and xtensa_set_sr. Fix up users. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: make bootparam parsing optionalMax Filippov2018-08-201-0/+8
| | | | | | | A kernel may not need any boot parameters from the bootloader, allow disabling bootparam parsing in that case. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: drop unneeded platform/hardware.h headersMax Filippov2018-08-201-2/+0
| | | | | | | | platform/hardware.h no longer supply any information for processor.h, vectors.h, setup.c or vmlinux.lds.S, don't include it. This header is now empty in the platforms/iss, so remove it altogether. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* Merge tag 'devicetree-for-4.16' of ↵Linus Torvalds2018-02-011-12/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree updates from Rob Herring: - Convert to use memblock_virt_alloc in DT code which supports bootmem arches. With this we can remove the arch specific early_init_dt_alloc_memory_arch() functions. - Enable running the DT unittests on UML - Use SPDX license tags on DT files - Fix early FDT kconfig ifdef logic - Clean-up unittest Makefile - Fix function comment for of_irq_parse_raw - Add missing documentation for linux,initrd-{start,end} properties - Clean-up of binding examples using uppercase hex - Add trivial devices W83773G and Infineon TLV493D-A1B6 - Add missing STM32 SoC bindings - Various small binding doc fixes * tag 'devicetree-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (23 commits) xtensa: remove arch specific early DT functions x86: remove arch specific early_init_dt_alloc_memory_arch nios2: remove arch specific early_init_dt_alloc_memory_arch mips: remove arch specific early_init_dt_alloc_memory_arch metag: remove arch specific early DT functions cris: remove arch specific early DT functions libfdt: remove unnecessary include directive from <linux/libfdt.h> of: unittest: refactor Makefile of/fdt: use memblock_virt_alloc for early alloc of: Use SPDX license tag for DT files of/fdt: Fix #ifdef dependency of early flattree declarations dt-bindings: h8300 clocksource: correct spelling of pulse dt-bindings: imx6q-pcie: Add required property for i.MX6SX mmc: Don't reference Linux-specific OF_GPIO_ACTIVE_LOW flag in DT binding dt-bindings: Use lower case hex in unit-addresses dt-bindings: display: panel: Fix compatible string for Toshiba LT089AC29000 dt-bindings: Add Infineon TLV493D-A1B6 dt-bindings: mailbox: ti,message-manager: Fix interrupt name error dt-bindings: chosen: Document linux,initrd-{start,end} dt-bindings: arm: document supported STM32 SoC family ...
| * xtensa: remove arch specific early DT functionsRob Herring2018-01-301-12/+0
| | | | | | | | | | | | | | | | | | | | | | | | Now that the DT core code handles bootmem arches, we can remove the xtensa specific early_init_dt_alloc_memory_arch function. The common early_init_dt_add_memory_arch can be used too now that xtensa switched to memblock. Cc: Chris Zankel <chris@zankel.net> Cc: linux-xtensa@linux-xtensa.org Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* | xtensa: add support for KASANMax Filippov2017-12-161-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cover kernel addresses above 0x90000000 by the shadow map. Enable HAVE_ARCH_KASAN when MMU is enabled. Provide kasan_early_init that fills shadow map with writable copies of kasan_zero_page. Call kasan_early_init right after mmu initialization in the setup_arch. Provide kasan_init that allocates proper shadow map pages from the memblock and puts these pages into the shadow map for addresses from VMALLOC area to the end of KSEG. Call kasan_init right after memblock initialization. Don't use KASAN for the boot code, MMU and KASAN initialization and page fault handler. Make kernel stack size 4 times larger when KASAN is enabled to avoid stack overflows. GCC 7.3, 8 or newer is required to build the xtensa kernel with KASAN. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: extract init_kioMax Filippov2017-12-161-4/+6
| | | | | | | | | | | | | | | | | | | | KIO region placement may be specified in the device tree, that's why it's initialized with the rest of MMU after the early_init_devtree. In order to support KASAN the MMU must be initialized earlier. Separate KIO initialization from the rest of MMU initialization. Reinitialize KIO if its location is specified in the device tree. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: clean up custom-controlled debug outputMax Filippov2017-12-161-4/+3
| | | | | | | | | | | | | | Replace #ifdef'fed/commented out debug printk statements with pr_debug. Replace printk statements with pr_* equivalents. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: print hardware config ID on startupMax Filippov2017-12-101-0/+9
| | | | | | | | | | | | | | Print hardware config ID on startup and config ID recorded in the configuration if it doesn't match one read from the hardware. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: build kernel with text-section-literalsMax Filippov2017-12-101-8/+8
|/ | | | | | | | | | | | vmlinux.lds.S doesn't do anything special with literals, so instead of keeping them separate put them into the corresponding text sections. Drop explicit .literal sections from the vmlinux.lds.S, use standard section macros. Mark literal pool locations in the assembly sources. Unfortunately assembler doesn't put literals into .init sections and external libgcc may still have .literal sections, so sed transformation to the linker script is still needed. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: Mark _stext and _end as char-arrays, not single char variablesMasami Hiramatsu2017-08-101-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Mark _stext and _end as character arrays instead of single character variables, like include/asm-generic/sections.h does. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Chris Zankel <chris@zankel.net> Cc: David S . Miller <davem@davemloft.net> Cc: Francis Deslauriers <francis.deslauriers@efficios.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: linux-arch@vger.kernel.org Cc: linux-cris-kernel@axis.com Cc: mathieu.desnoyers@efficios.com Link: http://lkml.kernel.org/r/150172775958.27216.12951305461398200544.stgit@devbox Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge tag 'xtensa-20170612' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2017-06-131-2/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa fixes from Max Filippov: - don't use linux IRQ #0 in legacy irq domains: fixes timer interrupt assignment when it's hardware IRQ # is 0 and the kernel is built w/o device tree support - reduce reservation size for double exception vector literals from 48 to 20 bytes: fixes build on cores with small user exception vector - cleanups: use kmalloc_array instead of kmalloc in simdisk_init and seq_puts instead of seq_printf in c_show. * tag 'xtensa-20170612' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: don't use linux IRQ #0 xtensa: reduce double exception literal reservation xtensa: ISS: Use kmalloc_array() in simdisk_init() xtensa: Use seq_puts() in c_show()
| * xtensa: Use seq_puts() in c_show()Markus Elfring2017-05-081-2/+1
| | | | | | | | | | | | | | | | | | | | A string which did not contain a data format specification should be put into a sequence. Thus use the corresponding function "seq_puts". This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | Merge branch 'xtensa-sim-params' into xtensa-fixesMax Filippov2017-05-071-3/+2
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| * | xtensa: ISS: update kernel command line in platform_setupMax Filippov2017-03-131-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Move platform_setup call higher in initialization sequence so that it could change kernel command line. Check command line passed to simulator in ISS platform_stup and update kernel command line if there's anything. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | | xtensa: use ITLB_HIT_BIT instead of hardcoded numberMax Filippov2017-04-281-2/+2
| |/ |/| | | | | | | | | There is ITLB_HIT_BIT macro, no need to use 0x8 to check for TLB hit. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | Merge tag 'xtensa-20170303' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2017-03-031-2/+5
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa updates from Max Filippov: - clean up bootable image build targets: provide separate 'Image', 'zImage' and 'uImage' make targets that only build corresponding image type. Make 'all' build all images appropriate for a platform - allow merging vectors code into .text section as a preparation step for XIP support - fix handling external FDT when the kernel is built without BLK_DEV_INITRD support * tag 'xtensa-20170303' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: allow merging vectors into .text section xtensa: clean up bootable image build targets xtensa: move parse_tag_fdt out of #ifdef CONFIG_BLK_DEV_INITRD
| * xtensa: allow merging vectors into .text sectionMax Filippov2017-03-011-0/+3
| | | | | | | | | | | | | | | | | | | | Currently code for exception/IRQ vectors is stored in kernel image as initialization data and is copied to its working addresses during startup. It doesn't always make sense. In many cases vectors location can be automatically decided at kernel link time and code can be placed right there. This is especially useful for XIP kernel. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: move parse_tag_fdt out of #ifdef CONFIG_BLK_DEV_INITRDMax Filippov2017-03-011-2/+2
| | | | | | | | | | | | | | | | | | | | FDT tag parsing is not related to whether BLK_DEV_INITRD is configured or not, move it out of the corresponding #ifdef/#endif block. This fixes passing external FDT to the kernel configured w/o BLK_DEV_INITRD support. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | Merge tag 'xtensa-20170202' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2017-02-021-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa fix from Max Filippov: "A for an Xtensa build error introduced in reset code refactoring series in v4.9: - fix noMMU build on cores with MMU" * tag 'xtensa-20170202' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: fix noMMU build on cores with MMU
| * | xtensa: fix noMMU build on cores with MMUMax Filippov2017-01-311-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | Commit bf15f86b343ed8 ("xtensa: initialize MMU before jumping to reset vector") calls MMU management functions even when CONFIG_MMU is not selected. That breaks noMMU build on cores with MMU. Don't manage MMU when CONFIG_MMU is not selected. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: move S32C1I self-test to a separate fileMax Filippov2016-11-161-115/+0
| | | | | | | | | | | | | | | | The test is not called from any of the setup functions, so there's no reason keeping it in the setup.c. Move it to s32c1i_selftest.c and drop related #include directives. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: fix screen_info, clean up unused declarations in setup.cMax Filippov2016-11-151-14/+8
|/ | | | | | | | | | | | | | screen_info on xtensa has old style initializer without field names. It was broken by the commit d9b263528e01 ("x86, setup: Store the boot cursor state") that split the unused2 field into two. Rewrite screen_info initialization with explicit field names. Drop unused declarations/tentative definitions of RTC- and FD-related structures. Drop inclusion of linux/timex.h when RTC is enabled in configuration. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* Merge tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2016-10-051-37/+151
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa updates from Max Filippov: "Updates for the xtensa architecture. It is a combined set of patches for 4.8 that never got to the mainline and new patches for 4.9. - add new kernel memory layouts for MMUv3 cores: with 256MB and 512MB KSEG size, starting at physical address other than 0 - make kernel load address configurable - clean up kernel memory layout macros - drop sysmem early allocator and switch to memblock - enable kmemleak and memory reservation from the device tree - wire up new syscalls: userfaultfd, membarrier, mlock2, copy_file_range, preadv2 and pwritev2 - add new platform: Cadence Configurable System Platform (CSP) and new core variant for it: xt_lnx - rearrange CCOUNT calibration code, make most of it generic - improve machine reset code (XTFPGA now reboots reliably with MMUv3 cores) - provide default memmap command line option for configurations without device tree support - ISS fixes: simdisk is now capable of using highmem pages, panic correctly terminates simulator" * tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa: (24 commits) xtensa: disable MMU initialization option on MMUv2 cores xtensa: add default memmap and mmio32native options to defconfigs xtensa: add default memmap option to common_defconfig xtensa: add default memmap option to iss_defconfig xtensa: ISS: allow simdisk to use high memory buffers xtensa: ISS: define simc_exit and use it instead of inline asm xtensa: xtfpga: group platform_* functions together xtensa: rearrange CCOUNT calibration xtensa: xtfpga: use clock provider, don't update DT xtensa: Tweak xuartps UART driver Rx watermark for Cadence CSP config. xtensa: initialize MMU before jumping to reset vector xtensa: fix icountlevel setting in cpu_reset xtensa: extract common CPU reset code into separate function xtensa: Added Cadence CSP kernel configuration for Xtensa xtensa: fix default kernel load address xtensa: wire up new syscalls xtensa: support reserved-memory DT node xtensa: drop sysmem and switch to memblock xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE} xtensa: cleanup MMU setup and kernel layout macros ...
| * xtensa: rearrange CCOUNT calibrationMax Filippov2016-09-201-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DT-enabled kernel should have a CPU node connected to a clock. This clock is the CCOUNT clock. Use old platform_calibrate_ccount call as a fallback when CPU node cannot be found or has no clock and in non-DT-enabled configurations. Drop no longer needed code that updates CPU clock-frequency property in the DT; drop DT-related code from the platform_calibrate_ccount too. Move of_clk_init to the top of time_init, so that clocks are initialized before CCOUNT calibration is attempted. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: initialize MMU before jumping to reset vectorMax Filippov2016-09-111-0/+108
| | | | | | | | | | | | | | | | | | | | | | | | When reset is simulated MMU need to be brought into its initial state, because that's what bootloaders/OS kernels assume. This is especially important for MMUv3 because TLB state when the kernel is running is significatly different from its reset state. With this change it is possible to boot linux and get back to U-Boot repeatedly. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: fix icountlevel setting in cpu_resetMax Filippov2016-09-111-1/+1
| | | | | | | | | | | | | | | | icountlevel SR value specifies lowest intlevel that does not do instruction counting, so to disable instruction counting completely it must be set to 0, not to 15. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: extract common CPU reset code into separate functionMax Filippov2016-09-111-0/+23
| | | | | | | | | | | | | | | | platform_restart implementatations do the same thing to reset CPU. Don't duplicate that code, move it to a function and call it from platform_restart. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: drop sysmem and switch to memblockMax Filippov2016-07-241-15/+21
| | | | | | | | | | | | | | | | 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 <jcmvbkbc@gmail.com>
| * xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE}Max Filippov2016-07-241-13/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <jcmvbkbc@gmail.com>
* | xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate ↵Rob Herring2016-07-261-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | with default match table" This partially reverts commit 69d99e6c0d62 keeping only the main purpose of the original commit which is the removal of of_platform_populate() call. The moving of of_clk_init() caused changes in the initialization order breaking booting. Fixes: 69d99e6c0d621f ("xtensa: Remove unnecessary of_platform_populate with default match table") Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Guenter Roeck <linux@roeck-us.net> Tested-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* | xtensa: Fix build error due to missing include fileGuenter Roeck2016-07-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 69d99e6c0d621f ("xtensa: Remove unnecessary of_platform_populate with default match table") dropped various include files from arch/xtensa/kernel/setup.c. This results in the following build error. arch/xtensa/kernel/setup.c: In function ‘xtensa_dt_io_area’: arch/xtensa/kernel/setup.c:213:2: error: implicit declaration of function ‘of_read_ulong’ Fixes: 69d99e6c0d621f ("xtensa: Remove unnecessary of_platform_populate with default match table") Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Rob Herring <robh@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* | xtensa: Remove unnecessary of_platform_populate with default match tableKefeng Wang2016-06-231-11/+0
|/ | | | | | | | | | | | | After patch "of/platform: Add common method to populate default bus", it is possible for arch code to remove unnecessary callers of of_platform_populate with default match table. Move of_clk_init() into time_init(), then drop xtensa_device_probe() fully. Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Rob Herring <robh@kernel.org>
* xtensa: fix secondary core boot in SMPMax Filippov2015-11-031-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are multiple factors adding to the issue in different configurations: - commit 17290231df16eeee ("xtensa: add fixup for double exception raised in window overflow") added function window_overflow_restore_a0_fixup to double exception vector overlapping reset vector location of secondary processor cores. - on MMUv2 cores RESET_VECTOR1_VADDR may point to uncached kernel memory making code overlapping depend on cache type and size, so that without cache or with WT cache reset vector code overwrites double exception code, making issue even harder to detect. - on MMUv3 cores RESET_VECTOR1_VADDR may point to unmapped area, as MMUv3 cores change virtual address map to match MMUv2 layout, but reset vector virtual address is given for the original MMUv3 mapping. - physical memory region of the secondary reset vector is not reserved in the physical memory map, and thus may be allocated and overwritten at arbitrary moment. Fix it as follows: - move window_overflow_restore_a0_fixup code to .text section. - define RESET_VECTOR1_VADDR so that it points to reset vector in the cacheable MMUv2 map for cores with MMU. - reserve reset vector region in the physical memory map. Drop separate literal section and build mxhead.S with text section literals. Cc: <stable@vger.kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: nommu: provide correct KIO addressesMax Filippov2015-11-021-1/+1
| | | | | | | | | | KIO region location is different for noMMU cores. Provide different default physical address and make KIO virtual address equal to physical. Move xtensa_get_kio_paddr function close to XCHAL_KIO_PADDR definition and define it not only for MMUv3, but for all MMU options except MMUv2. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: use %*pb[l] to print bitmaps including cpumasks and nodemasksTejun Heo2015-02-131-5/+2
| | | | | | | | | | | | | printk and friends can now format bitmaps using '%*pb[l]'. cpumask and nodemask also provide cpumask_pr_args() and nodemask_pr_args() respectively which can be used to generate the two printf arguments necessary to format the specified cpu/nodemask. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'dt-bus-name' into for-nextRob Herring2014-05-131-35/+11
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| * xtensa: handle memmap kernel optionMax Filippov2014-04-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | This option is useful for reserving memory regions for secondary cores in AMP configurations. Implement the following memmap variants: - memmap=nn[KMG]@ss[KMG]: force usage of a specific region of memory; - memmap=nn[KMG]$ss[KMG]: mark specified memory as reserved; - memmap=nn[KMG]: set end of memory. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: keep sysmem banks ordered in mem_reserveMax Filippov2014-04-021-1/+1
| | | | | | | | | | | | | | Rewrite mem_reserve so that it keeps bank order. Also make its return code more traditional. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: split bootparam and kernel meminfoMax Filippov2014-04-021-34/+9
| | | | | | | | | | | | | | | | | | | | Bootparam meminfo is a bootloader ABI, kernel meminfo is for the kernel bookkeeping, keep them separate. Kernel doesn't care of memory region types, so drop the type field and don't pass it to add_sysmem_bank. Move kernel sysmem structures and prototypes to asm/sysmem.h and sysmem variable and add_sysmem_bank to mm/init.c Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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