#
fd90410e |
|
09-Oct-2023 |
Arnd Bergmann <arnd@arndb.de> |
vgacon, arch/*: remove unused screen_info definitions A number of architectures either kept the screen_info definition for historical purposes as it used to be required by the generic VT code, or they copied it from another architecture in order to build the VGA console driver in an allmodconfig build. The mips definition is used by some platforms, but the initialization on jazz is not needed. Now that vgacon no longer builds on these architectures, remove the stale definitions and initializations. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Acked-by: Dinh Nguyen <dinguyen@kernel.org> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Acked-by: Guo Ren <guoren@kernel.org> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20231009211845.3136536-5-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
#
03ce34cf |
|
31-Jan-2020 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add XIP-aware MTD support Add Kconfig symbol, asm/mtd-xip.h header and define related macros: xip_cpu_idle, xip_irqpending, xip_currtime and xip_elapsed_since. Append .xiptext to the vectors when separate vectors are configured because otherwise they are appended to the data and data may not even be executable in XIP configuration. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
f29cf776 |
|
13-Jun-2023 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add load/store exception handler Memory attached to instruction bus of the xtensa CPU is only accessible for a limited subset of opcodes. Other opcodes generate an exception with the load/store error cause code. This property complicates use of such systems. Provide a handler that recognizes and transparently fixes such exceptions. The following opcodes are recognized when used outside of FLIX bundles: l32i, l32i.n, l16ui, l16si, l8ui. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
67e88622 |
|
13-Jun-2023 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: move early_trap_init from kasan_early_init to init_arch There may be other users for the early traps besides KASAN. Move call to the early_trap_init from kasan_early_init. Protect init_exc_table initializer with ifdef to make sure it builds on noMMU configurations. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
e6807b44 |
|
21-May-2023 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: report trax and perf counters in cpuinfo Add 'trax' to the list of CPU features when xtensa core is configured with TRAX. Add 'perf' to the list of CPU features when xtensa core is configured with perf counters and show the number of configured perf counters. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
7561dfbf |
|
07-Jun-2023 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: drop platform_halt and platform_power_off Instead of using xtensa-specific platform_halt and platform_power_off callbacks use do_kernel_power_off in the machine_halt and machine_power_off and reimplement existing platform_halt and platform_power_off users with register_sys_off_handler. Drop platform_halt and platform_power_off declarations and default implementations. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
11976fe2 |
|
06-Jun-2023 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: drop platform_restart Instead of using xtensa-specific platform_restart callback use do_kernel_restart in the machine_restart implementation and reimplement existing platform_restart users with register_restart_handler. Drop platform_restart declaration and default implementation. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
89b184f9 |
|
28-Dec-2021 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: make secondary reset vector support conditional Whether xtensa cores start from primary or secondary reset vector is configurable and may be chosen by board designer or controlled at runtime. When secondary reset vector is unused its location in memory may not be writable. Make secondary reset vector support conditional and don't build and load secondary reset vector code when it is disabled. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
9ddef266 |
|
20-Dec-2021 |
Jason Wang <wangborong@cdjrlc.com> |
xtensa: use strscpy to copy strings The strlcpy should not be used because it doesn't limit the source length. So that it will lead some potential bugs. But the strscpy doesn't require reading memory from the src string beyond the specified "count" bytes, and since the return value is easier to error-check than strlcpy()'s. In addition, the implementation is robust to the string changing out from underneath it, unlike the current strlcpy() implementation. Thus, replace strlcpy with strscpy. Signed-off-by: Jason Wang <wangborong@cdjrlc.com> Message-Id: <20211220084756.955307-1-wangborong@cdjrlc.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
bd47cdb7 |
|
29-Aug-2021 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: move section symbols to asm/sections.h Introduce asm/sections.h and move section declarations to this header from setup.c. Assign section symbols char array type uniformly and drop address operator from section symbol references in code. Sort headers in setup.c while at it. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
da0a4e5c |
|
26-Jul-2021 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: only build windowed register support code when needed There's no need in window overflow/underflow/alloca exception handlers or window spill code when neither kernel nor userspace support windowed registers. Don't build or link it. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
d67ed251 |
|
24-Sep-2021 |
Randy Dunlap <rdunlap@infradead.org> |
xtensa: use CONFIG_USE_OF instead of CONFIG_OF CONFIG_OF can be set by a randconfig or by a user -- without setting the early flattree option (OF_EARLY_FLATTREE). This causes build errors. However, if randconfig or a user sets USE_OF in the Xtensa config, the right kconfig symbols are set to fix the build. Fixes these build errors: ../arch/xtensa/kernel/setup.c:67:19: error: ‘__dtb_start’ undeclared here (not in a function); did you mean ‘dtb_start’? 67 | void *dtb_start = __dtb_start; | ^~~~~~~~~~~ ../arch/xtensa/kernel/setup.c: In function 'xtensa_dt_io_area': ../arch/xtensa/kernel/setup.c:201:14: error: implicit declaration of function 'of_flat_dt_is_compatible'; did you mean 'of_machine_is_compatible'? [-Werror=implicit-function-declaration] 201 | if (!of_flat_dt_is_compatible(node, "simple-bus")) ../arch/xtensa/kernel/setup.c:204:18: error: implicit declaration of function 'of_get_flat_dt_prop' [-Werror=implicit-function-declaration] 204 | ranges = of_get_flat_dt_prop(node, "ranges", &len); ../arch/xtensa/kernel/setup.c:204:16: error: assignment to 'const __be32 *' {aka 'const unsigned int *'} from 'int' makes pointer from integer without a cast [-Werror=int-conversion] 204 | ranges = of_get_flat_dt_prop(node, "ranges", &len); | ^ ../arch/xtensa/kernel/setup.c: In function 'early_init_devtree': ../arch/xtensa/kernel/setup.c:228:9: error: implicit declaration of function 'early_init_dt_scan'; did you mean 'early_init_devtree'? [-Werror=implicit-function-declaration] 228 | early_init_dt_scan(params); ../arch/xtensa/kernel/setup.c:229:9: error: implicit declaration of function 'of_scan_flat_dt' [-Werror=implicit-function-declaration] 229 | of_scan_flat_dt(xtensa_dt_io_area, NULL); xtensa-elf-ld: arch/xtensa/mm/mmu.o:(.text+0x0): undefined reference to `xtensa_kio_paddr' Fixes: da844a81779e ("xtensa: add device trees support") Fixes: 6cb971114f63 ("xtensa: remap io area defined in device tree") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
33def849 |
|
21-Oct-2020 |
Joe Perches <joe@perches.com> |
treewide: Convert macro and uses of __section(foo) to __section("foo") Use a more generic form for __section that requires quotes to avoid complications with clang and gcc differences. Remove the quote operator # from compiler_attributes.h __section macro. Convert all unquoted __section(foo) uses to quoted __section("foo"). Also convert __attribute__((section("foo"))) uses to __section("foo") even if the __attribute__ has multiple list entry forms. Conversion done using the script at: https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl Signed-off-by: Joe Perches <joe@perches.com> Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
0d5ab144 |
|
02-Jul-2020 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: update *pos in cpuinfo_op.next Increment *pos in the cpuinfo_op.next to fix the following warning triggered by cat /proc/cpuinfo: seq_file: buggy .next function c_next did not update position index Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
e31cf2f4 |
|
08-Jun-2020 |
Mike Rapoport <rppt@kernel.org> |
mm: don't include asm/pgtable.h if linux/mm.h is already included Patch series "mm: consolidate definitions of page table accessors", v2. The low level page table accessors (pXY_index(), pXY_offset()) are duplicated across all architectures and sometimes more than once. For instance, we have 31 definition of pgd_offset() for 25 supported architectures. Most of these definitions are actually identical and typically it boils down to, e.g. static inline unsigned long pmd_index(unsigned long address) { return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); } static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) { return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); } These definitions can be shared among 90% of the arches provided XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined. For architectures that really need a custom version there is always possibility to override the generic version with the usual ifdefs magic. These patches introduce include/linux/pgtable.h that replaces include/asm-generic/pgtable.h and add the definitions of the page table accessors to the new header. This patch (of 12): The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the functions involving page table manipulations, e.g. pte_alloc() and pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h> in the files that include <linux/mm.h>. The include statements in such cases are remove with a simple loop: for f in $(git grep -l "include <linux/mm.h>") ; do sed -i -e '/include <asm\/pgtable.h>/ d' $f done Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Mike Rapoport <rppt@kernel.org> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
5e4417f9 |
|
31-Jan-2020 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: reorganize vectors placement 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>
|
#
50722f0b |
|
31-Jan-2020 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: move fast exception handlers close to vectors 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>
|
#
fec63889 |
|
18-Dec-2019 |
Arvind Sankar <nivedita@alum.mit.edu> |
arch/xtensa/setup: Drop dummy_con initialization 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>
|
#
7af710d9 |
|
03-Jan-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add XIP kernel support 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>
|
#
f348f5c2 |
|
24-Jul-2019 |
Mike Rapoport <rppt@kernel.org> |
xtensa: remove free_initrd_mem 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>
|
#
cd8869f4 |
|
12-Aug-2019 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add missing isync to the cpu_reset TLB code 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>
|
#
88804e68 |
|
15-Oct-2018 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: drop dead PCI support code 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>
|
#
adefd051 |
|
30-May-2019 |
Guenter Roeck <linux@roeck-us.net> |
xtensa: Fix section mismatch between memblock_reserve and mem_reserve 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>
|
#
f7c34874 |
|
20-Dec-2018 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add exclusive atomics support 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>
|
#
cad6fade |
|
27-Nov-2018 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: clean up WSR*/RSR*/get_sr/set_sr 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>
|
#
baac1d36 |
|
13-Aug-2018 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: make bootparam parsing optional 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>
|
#
fc862ee9 |
|
13-Aug-2018 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: drop unneeded platform/hardware.h headers 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>
|
#
3a6fbcb2 |
|
05-Jan-2018 |
Rob Herring <robh@kernel.org> |
xtensa: remove arch specific early DT functions 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>
|
#
c633544a |
|
03-Dec-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add support for KASAN 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>
|
#
c2edb35a |
|
15-Dec-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: extract init_kio 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>
|
#
c130d3be |
|
15-Dec-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: clean up custom-controlled debug output 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>
|
#
aa6476f7 |
|
08-Aug-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: print hardware config ID on startup 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>
|
#
f8f02ca7 |
|
03-Dec-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: build kernel with text-section-literals 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>
|
#
18244362 |
|
02-Aug-2017 |
Masami Hiramatsu <mhiramat@kernel.org> |
xtensa: Mark _stext and _end as char-arrays, not single char variables 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>
|
#
c32537d4 |
|
07-May-2017 |
Markus Elfring <elfring@users.sourceforge.net> |
xtensa: Use seq_puts() in c_show() 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>
|
#
60e22cff |
|
29-Mar-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: use ITLB_HIT_BIT instead of hardcoded number There is ITLB_HIT_BIT macro, no need to use 0x8 to check for TLB hit. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
fbe22d28 |
|
13-Mar-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: ISS: update kernel command line in platform_setup 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>
|
#
b46dcfa3 |
|
04-Jan-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: allow merging vectors into .text section 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>
|
#
4ab18701 |
|
03-Jan-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: move parse_tag_fdt out of #ifdef CONFIG_BLK_DEV_INITRD 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>
|
#
4b3e6f2e |
|
31-Jan-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix noMMU build on cores with MMU 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>
|
#
3863c58c |
|
16-Nov-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: move S32C1I self-test to a separate file 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>
|
#
03eae3ac |
|
15-Nov-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix screen_info, clean up unused declarations in setup.c 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>
|
#
205ad548 |
|
20-Sep-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: rearrange CCOUNT calibration 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>
|
#
bf15f86b |
|
11-Sep-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: initialize MMU before jumping to reset vector 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>
|
#
ea951c34 |
|
11-Sep-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix icountlevel setting in cpu_reset 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>
|
#
4f205687 |
|
07-Sep-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: extract common CPU reset code into separate function 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>
|
#
e973f4ec |
|
26-Jul-2016 |
Rob Herring <robh@kernel.org> |
xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate 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>
|
#
d02014b2 |
|
23-Jul-2016 |
Guenter Roeck <linux@roeck-us.net> |
xtensa: Fix build error due to missing include file 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>
|
#
0e46c111 |
|
25-Apr-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: drop sysmem and switch to memblock 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>
|
#
3de00482 |
|
22-Jul-2016 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE} 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>
|
#
69d99e6c |
|
01-Jun-2016 |
Kefeng Wang <wangkefeng.wang@huawei.com> |
xtensa: Remove unnecessary of_platform_populate with default match table 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>
|
#
ab45fb14 |
|
16-Oct-2015 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix secondary core boot in SMP 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>
|
#
260c64bb |
|
24-Sep-2015 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: nommu: provide correct KIO addresses 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>
|
#
62518994 |
|
13-Feb-2015 |
Tejun Heo <tj@kernel.org> |
xtensa: use %*pb[l] to print bitmaps including cpumasks and nodemasks 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>
|
#
9d0c4dfe |
|
01-Apr-2014 |
Rob Herring <robh@kernel.org> |
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
|
#
ccf3356e |
|
03-Apr-2014 |
Rob Herring <robh@kernel.org> |
of/fdt: consolidate built-in dtb section variables Unify the various architectures __dtb_start and __dtb_end definitions moving them into of_fdt.h. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: James Hogan <james.hogan@imgtec.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-metag@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-xtensa@linux-xtensa.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
|
#
06bd2824 |
|
21-Mar-2014 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: handle memmap kernel option 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>
|
#
62327918 |
|
22-Mar-2014 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: keep sysmem banks ordered in mem_reserve Rewrite mem_reserve so that it keeps bank order. Also make its return code more traditional. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
9ba067f9 |
|
22-Mar-2014 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: split bootparam and kernel meminfo 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>
|
#
bda8932d |
|
28-Jan-2014 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: support common clock framework Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
6cb97111 |
|
29-Dec-2013 |
Baruch Siach <baruch@tkos.co.il> |
xtensa: remap io area defined in device tree Use the simple-bus node to discover the io area, and remap the cached and bypass io ranges. The parent-bus-address value of the first triplet in the "ranges" property is used. This value is rounded down to the nearest 256MB boundary. The length of the io area is fixed at 256MB; the "ranges" property length value is ignored. Other limitations: (1) only the first simple-bus node is considered, and (2) only the first triplet of the "ranges" property is considered. See ePAPR 1.1 §6.5 for the simple-bus node description, and §2.3.8 for the "ranges" property description. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
f8935f30 |
|
23-Dec-2013 |
Baruch Siach <baruch@tkos.co.il> |
xtensa: support default device tree buses This currently includes simple-bus. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
|
#
49b424fe |
|
16-Oct-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: implement CPU hotplug Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
f615136c |
|
16-Oct-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add SMP support This is largely based on SMP code from the xtensa-2.6.29-smp tree by Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly other Tensilica folks). Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
c8f3a7dc |
|
16-Oct-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: move init_mmu declaration to mmu_context.h Secondary CPUs need this declaration to initialize their MMUs. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
59970753 |
|
16-Oct-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: call check_s32c1i after trap_init Otherwise exceptions may occur prior to exception handling mechanism initialization, resulting in silently dead system. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
29eb45a9 |
|
30-Aug-2013 |
Rob Herring <rob.herring@calxeda.com> |
of: remove early_init_dt_setup_initrd_arch All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org>
|
#
7745fc1f |
|
28-Aug-2013 |
Rob Herring <rob.herring@calxeda.com> |
xtensa: use early_init_dt_scan Convert xtensa to use new early_init_dt_scan function. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Cc: Chris Zankel <chris@zankel.net> Cc: linux-xtensa@linux-xtensa.org
|
#
3104021c |
|
26-Aug-2013 |
Rob Herring <rob.herring@calxeda.com> |
xtensa: use unflatten_and_copy_device_tree Use the common unflatten_and_copy_device_tree to copy the built-in FDT out of init section. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-xtensa@linux-xtensa.org Acked-by: Grant Likely <grant.likely@linaro.org>
|
#
8d5e1d8e |
|
14-Jul-2013 |
Baruch Siach <baruch@tkos.co.il> |
xtensa: remove CCOUNT_PER_JIFFY Use ccount_freq directly to make the code a little more readable. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
374d5c99 |
|
01-Jul-2013 |
Santosh Shilimkar <santosh.shilimkar@ti.com> |
of: Specify initrd location using 64-bit On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
|
#
220f5354 |
|
21-Feb-2013 |
Vineet Gupta <Vineet.Gupta1@synopsys.com> |
xtensa: Flat DeviceTree copy not future-safe flat DT copy code calls bootmem allocator with @align = 0. This is probably OK with legacy allocator which xtensa uses right now, but this will panic right away with memblock allocator Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Marc Gauthier <marc@tensilica.com> Cc: linux-xtensa@linux-xtensa.org Cc: linux-kernel@vger.kernel.org Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
c5a771d0 |
|
08-Jun-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: adjust boot parameters address when INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX is selected The virtual address of boot parameters chain is passed to the kernel via a2 register. Adjust it in case it is remapped during MMUv3 -> MMUv2 mapping change, i.e. when it is in the first 128M. Also fix interpretation of initrd and FDT addresses passed in the boot parameters: these are physical addresses. Cc: stable@vger.kernel.org Reported-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
2d1c645c |
|
04-Jan-2013 |
Marc Gauthier <marc@tensilica.com> |
xtensa: dispatch medium-priority interrupts Add support for dispatching medium-priority interrupts, that is, interrupts of priority levels 2 to EXCM_LEVEL. IRQ handling may be preempted by higher priority IRQ. Signed-off-by: Marc Gauthier <marc@tensilica.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
c4c4594b |
|
28-Nov-2012 |
Chris Zankel <chris@zankel.net> |
xtensa: clean up files to make them code-style compliant Remove heading and trailing spaces, trim trailing lines, and wrap lines that are longer than 80 characters. Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
da844a81 |
|
03-Nov-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add device trees support Device trees allow specification of hardware topology and device parameters at runtime instead of hard-coding them in platform setup code. This allows running single binary kernel on a range of compatible boards. New boot parameters tag BP_TAG_FDT is allocated and a pointer to flat device tree is passed in it. Note that current interrupt mapping scheme uses single cell for interrupt identification. That means that IRQ numbers used in DTS must be CPU internal IRQ numbers, not external. It is possible to extend interrupt identification to two cells, and use second cell to tell external IRQ numbers form internal. That would allow to use single DTS on multiple boards with different mapping of external IRQ numbers. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
00273125 |
|
28-Nov-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add s32c1i sanity check Add a brief sanity test of S32C1I functionality. This instruction is needed by the kernel and userland as part of the base ABI (including GCC atomic builtins, certain threading packages, future atomic support in the C++ standard, etc). However, correct operation of this instruction requires some cooperation by hardware external to the processor (such as bus bridge, bus fabric, or memory controller). Minimally exercising this mechanism and reporting explicit status early in the boot process is helpful to chip vendors using the Linux kernel as a benchmark of correctness of hardware. As it turns out, S32C1I is not exercised by the kernel and by uClibc based userland as of early June 2008. This is expected to change soon as both incorporate more recent open source developments. Signed-off-by: Marc Gauthier <marc@tensilica.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
2f6ea6a7 |
|
10-Nov-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: display s32c1i feature flag in cpuinfo Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
415217ef |
|
10-Nov-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix CPU cache flags formatting Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
f4349b6e |
|
14-Oct-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix boot parameters parsing Boot parameter tags with handlers are ignored like this: [ 0.000000] Ignoring tag 0x00001003 [ 0.000000] Ignoring tag 0x00001001 [ 0.000000] Ignoring tag 0x00001004 because neither tagtable entries nor tag handlers appear in the vmlinux. Fix tagtable definition attributes so that tag entries are not dropped. Fix end of memory bank calculation in parse_tag_mem: it is intended to round down to page size, but instead did something strange leading to hang right after boot. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
9ad79b58 |
|
16-Sep-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: drop CONFIG_EMBEDDED_RAMDISK Remove Kconfig entries, boot subdirectory, dependencies from other boot-* Makefiles, and sections from ld scripts. Remove stale redboot code that used to pass initrd addresses in a3 and a4 to _start. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
f9aa7e18 |
|
28-Mar-2012 |
David Howells <dhowells@redhat.com> |
Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Xtensa. Signed-off-by: David Howells <dhowells@redhat.com> cc: Chris Zankel <chris@zankel.net>
|
#
e5083a63 |
|
04-Mar-2009 |
Johannes Weiner <jw@emlix.com> |
xtensa: nommu support Add support for !CONFIG_MMU setups. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
5a891ed5 |
|
10-Mar-2009 |
Alexey Dobriyan <adobriyan@gmail.com> |
xtensa: fix compilation somewhat * ->put_char changes * HIGHMEM is bogus it seems, there is no kmap_atomic() et al * some includes Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Chris Zankel <zankel@tensilica.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
91ddc998 |
|
13-Oct-2008 |
Adrian Bunk <bunk@kernel.org> |
xtensa: remove dead CONFIG_BLK_DEV_IDE code I don't know why this was there, but it was dead code. Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: chris@zankel.net Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
|
#
27ac792c |
|
23-Jul-2008 |
Andrea Righi <righi.andrea@gmail.com> |
PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit boundary. For example: u64 val = PAGE_ALIGN(size); always returns a value < 4GB even if size is greater than 4GB. The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for example): #define PAGE_SHIFT 12 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) ... #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) The "~" is performed on a 32-bit value, so everything in "and" with PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary. Using the ALIGN() macro seems to be the right way, because it uses typeof(addr) for the mask. Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in include/linux/mm.h. See also lkml discussion: http://lkml.org/lkml/2008/6/11/237 [akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c] [akpm@linux-foundation.org: fix v850] [akpm@linux-foundation.org: fix powerpc] [akpm@linux-foundation.org: fix arm] [akpm@linux-foundation.org: fix mips] [akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c] [akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c] [akpm@linux-foundation.org: fix powerpc] Signed-off-by: Andrea Righi <righi.andrea@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
78c5bbc1 |
|
07-Dec-2007 |
Adrian Bunk <bunk@kernel.org> |
[XTENSA] Remove dead code reported by Robert P. J. Day. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Christian Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
#
03a44825 |
|
08-Feb-2008 |
Jan Engelhardt <jengelh@computergmbh.de> |
procfs: constify function pointer tables Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-By: David Howells <dhowells@redhat.com> Acked-by: Bryan Wu <bryan.wu@analog.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
de4f6e5b |
|
31-May-2007 |
Chris Zankel <chris@zankel.net> |
[XTENSA] clean-up header files The header files in the asm-xtensa directory are not clean and 'make headers_check' fails. This is a first patch to fix most of the header files. It removes unnecessary include statements and adds some that are required for building the kernel. The linker script required some updates or the linking stage would fail. Signed-off-by: Chris Zankel <chris@zankel.net>
|
#
d3e9ccea |
|
12-Feb-2007 |
Alon Bar-Lev <alon.barlev@gmail.com> |
[PATCH] Dynamic kernel command-line: xtensa 1. Rename saved_command_line into boot_command_line. 2. Set command_line as __initdata. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
173d6681 |
|
10-Dec-2006 |
Chris Zankel <czankel@tensilica.com> |
[PATCH] xtensa: remove extra header files The Xtensa port contained many header files that were never needed. This rather lengthy patch removes all those files. Unfortunately, there were many dependencies that needed to be updated, so this patch touches quite a few source files. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
#
f30c2269 |
|
03-Oct-2006 |
Uwe Zeisberger <Uwe_Zeisberger@digi.com> |
fix file specification in comments Many files include the filename at the beginning, serveral used a wrong one. Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
|
#
894673ee |
|
10-Jul-2006 |
Jon Smirl <jonsmir@gmail.com> |
[PATCH] tty: Remove include of screen_info.h from tty.h screen_info.h doesn't have anything to do with the tty layer and shouldn't be included by tty.h. This patches removes the include and modifies all users to directly include screen_info.h. struct screen_info is mainly used to communicate with the console drivers in drivers/video/console. Note that this patch touches every arch and I have no way of testing it. If there is a mistake the worst thing that will happen is a compile error. [akpm@osdl.org: fix arm build] [akpm@osdl.org: fix alpha build] Signed-off-by: Jon Smirl <jonsmir@gmail.com> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
#
6ab3d562 |
|
30-Jun-2006 |
Jörn Engel <joern@wohnheim.fh-wedel.de> |
Remove obsolete #include <linux/config.h> Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
|
#
288a60cf |
|
22-Sep-2005 |
Chris Zankel <czankel@tensilica.com> |
[PATCH] xtensa: remove io_remap_page_range and minor clean-ups Remove io_remap_page_range() from all of Linux 2.6.x (as requested and suggested by Randy Dunlap) and minor clean-ups. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
#
5a0015d6 |
|
23-Jun-2005 |
Chris Zankel <czankel@tensilica.com> |
[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3 The attached patches provides part 3 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|