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2010-12-24ARM: simplify early machine init hooksRussell King1-11/+4
Rather than storing each machine init hook separately, store a pointer to the machine description record and dereference this instead. This pointer is only available while the init sections are present, which is not a problem as we only use it from init code. Signed-off-by: Russell King <[email protected]>
2010-12-24ARM: 6532/1: Allow machine to specify it's own IRQ handlers at run-timeeric miao1-0/+3
Normally different ARM platform has different way to decode the IRQ hardware status and demultiplex to the corresponding IRQ handler. This is highly optimized by macro irq_handler in entry-armv.S, and each machine defines their own macro to decode the IRQ number. However, this prevents multiple machine classes to be built into a single kernel. By allowing each machine to specify thier own handler, and making function pointer 'handle_arch_irq' to point to it at run time, this can be solved. And introduce CONFIG_MULTI_IRQ_HANDLER to allow both solutions to work. Comparing with the highly optimized macro of irq_handler, the new function must be written with care not to lose too much performance. And the IPI stuff on SMP is expected to move to the provided arch IRQ handler as well. The assembly code to invoke handle_arch_irq is optimized by Russell King. Signed-off-by: Eric Miao <[email protected]> Acked-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-12-05ARM: move high-usage mostly read variables in setup.c to __read_mostlyRussell King1-8/+8
Signed-off-by: Russell King <[email protected]>
2010-10-18Merge branches 'at91', 'dcache', 'ftrace', 'hwbpt', 'misc', 'mmci', 's3c', ↵Russell King1-5/+41
'st-ux' and 'unwind' into devel
2010-10-08ARM: vmlinux.lds: Refer to start of .data using _sdata rather than _dataRussell King1-1/+1
Use _sdata as the start of the data section, rather than _data. Signed-off-by: Russell King <[email protected]>
2010-10-08ARM: 6431/1: fix isb regression on CPU < v7Linus Walleij1-4/+5
The kernel does not compile for my ARM926EJ-S system U300 due to the isb instruction inserted in generic assember statement from commit 8925ec4c530094b878e7e28a1fd78e7122afd973, "ARM: 6385/1: setup: detect aliasing I-cache when D-cache is non-aliasing" hey the isb is only available when assembling for v7 so let's use the generic isb() macro from setup.h instead. Acked-by: Will Deacon <[email protected]> Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-10-04ARM: 6385/1: setup: detect aliasing I-cache when D-cache is non-aliasingWill Deacon1-3/+36
Currently, the Kernel assumes that if a CPU has a non-aliasing D-cache then the I-cache is also non-aliasing. This may not be true on ARM cores from v6 onwards, which may have aliasing I-caches but non-aliasing D-caches. This patch adds a cpu_has_aliasing_icache function, which is called from cacheid_init and adds CACHEID_VIPT_I_ALIASING to the cacheid when appropriate. A utility macro, icache_is_vipt_aliasing(), is also provided. Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-10-04ARM: Allow SMP kernels to boot on UP systemsRussell King1-1/+3
UP systems do not implement all the instructions that SMP systems have, so in order to boot a SMP kernel on a UP system, we need to rewrite parts of the kernel. Do this using an 'alternatives' scheme, where the kernel code and data is modified prior to initialization to replace the SMP instructions, thereby rendering the problematical code ineffectual. We use the linker to generate a list of 32-bit word locations and their replacement values, and run through these replacements when we detect a UP system. Signed-off-by: Russell King <[email protected]>
2010-07-31Merge branch 'devel-stable' into develRussell King1-0/+11
Conflicts: arch/arm/kernel/entry-armv.S arch/arm/kernel/setup.c arch/arm/mm/init.c
2010-07-31Merge branches 'at91', 'ep93xx', 'kexec', 'iop', 'lmb', 'nomadik', 'nuc', ↵Russell King1-2/+98
'pl', 'spear' and 'versatile' into devel
2010-07-27ARM: Convert platform reservations to use LMB rather than bootmemRussell King1-1/+1
Signed-off-by: Russell King <[email protected]>
2010-07-27ARM: initial LMB trialRussell King1-0/+3
Acked-by: Tony Lindgren <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-07-16ARM: Remove DISCONTIGMEM supportRussell King1-2/+1
Everything should now be using sparsemem rather than discontigmem, so remove the code supporting discontigmem from ARM. Signed-off-by: Russell King <[email protected]>
2010-07-09ARM: 6122/1: kdump: add support for elfcorehdr parameterMika Westerberg1-0/+25
This parameter is used by primary kernel to pass address of vmcore header to the dump capture kernel. Signed-off-by: Mika Westerberg <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-07-09ARM: 6116/1: kdump: reserve memory for crashkernelMika Westerberg1-0/+51
Implemented ARM support for command line option "crashkernel=size@start" which allows user to reserve some memory for a dump capture kernel. Signed-off-by: Mika Westerberg <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-07-09ARM: 6207/1: Replace CONFIG_HAS_TLS_REG with HWCAP_TLS and check for it on V6Tony Lindgren1-0/+17
The TLS register is only available on ARM1136 r1p0 and later. Set HWCAP_TLS flags if hardware TLS is available and test for it if CONFIG_CPU_32v6K is not set for V6. Note that we set the TLS instruction in __kuser_get_tls dynamically as suggested by Jamie Lokier <[email protected]>. Also the __switch_to code is optimized out in most cases as suggested by Nicolas Pitre <[email protected]>. Reviewed-by: Nicolas Pitre <[email protected]> Signed-off-by: Tony Lindgren <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-07-09ARM: 6197/2: preliminary support for sparse IRQeric miao1-0/+1
So to allow NR_IRQS to be dynamic and platforms to specify the number of IRQs really needed. Acked-by: Paul Mundt <[email protected]> Signed-off-by: Eric Miao <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-07-07ARM: deprecate support for old way to pass kernel parametersUwe Kleine-König1-0/+11
This was deprecated in 2001 and announced to live on for 5 years. For now provide a kernel parameter for those who still need it. Acked-by: Eric Miao <[email protected]> Signed-off-by: Uwe Kleine-König <[email protected]>
2010-05-24ARM: 5939/1: ARM: Add option CMDLINE_FORCE to force usage of the in-kernel ↵Alexander Holler1-0/+2
cmdline Add an option to force usage of the in-kernel cmdline even if the boot loader passes another command string to the kernel. Useful if someone cannot or don't want to change the command-line options of the boot loader but is able to change the kernel. Signed-off-by: Alexander Holler <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-03-01Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-48/+31
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (100 commits) ARM: Eliminate decompressor -Dstatic= PIC hack ARM: 5958/1: ARM: U300: fix inverted clk round rate ARM: 5956/1: misplaced parentheses ARM: 5955/1: ep93xx: move timer defines into core.c and document ARM: 5954/1: ep93xx: move gpio interrupt support to gpio.c ARM: 5953/1: ep93xx: fix broken build of clock.c ARM: 5952/1: ARM: MM: Add ARM_L1_CACHE_SHIFT_6 for handle inside each ARCH Kconfig ARM: 5949/1: NUC900 add gpio virtual memory map ARM: 5948/1: Enable timer0 to time4 clock support for nuc910 ARM: 5940/2: ARM: MMCI: remove custom DBG macro and printk ARM: make_coherent(): fix problems with highpte, part 2 MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself ARM: 5945/1: ep93xx: include correct irq.h in core.c ARM: 5933/1: amba-pl011: support hardware flow control ARM: 5930/1: Add PKMAP area description to memory.txt. ARM: 5929/1: Add checks to detect overlap of memory regions. ARM: 5928/1: Change type of VMALLOC_END to unsigned long. ARM: 5927/1: Make delimiters of DMA area globally visibly. ARM: 5926/1: Add "Virtual kernel memory..." printout. ARM: 5920/1: OMAP4: Enable L2 Cache ... Fix up trivial conflict in arch/arm/mach-mx25/clock.c
2010-02-18ARM: 5938/1: ARM: L2: export outer_cache_fnsSantosh Shilimkar1-0/+1
The 'outer_cache' variable is needed by the outer_inv_range(), outer_clean_range() and outer_flush_range() functions, which are declared as inline in asm/cacheflush.h. Otherwise drivers built as a loadable module, which access these functions, will have an undefined symbol. Signed-off-by: Santosh Shilimkar <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-02-15ARM: 5906/1: arm: change command_line to cmd_lineJeremy Kerr1-4/+4
drivers/of/fdt expects a cmd_line symbol, while arm uses command_line. Change to the former, so that we can eventually share with the fdt code. Signed-off-by: Jeremy Kerr <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-02-15ARM: 5880/1: arm: use generic infrastructure for early paramsJeremy Kerr1-46/+16
The ARM setup code includes its own parser for early params, there's also one in the generic init code. This patch removes __early_init (and related code) from arch/arm/kernel/setup.c, and changes users to the generic early_init macro instead. The generic macro takes a char * argument, rather than char **, so we need to update the parser functions a little. Signed-off-by: Jeremy Kerr <[email protected]> Signed-off-by: Russell King <[email protected]>
2010-02-15ARM: Move creation of /proc/cpu out of alignment.cRussell King1-1/+14
Always creating this directory avoids other users having to jump through silly hoops when they want to share this directory. Signed-off-by: Russell King <[email protected]>
2009-09-15ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3Linus Walleij1-0/+2
This adds the TCM interface to Linux, when active, it will detect and report TCM memories and sizes early in boot if present, introduce generic TCM memory handling, provide a generic TCM memory pool and select TCM memory for the U300 platform. See the Documentation/arm/tcm.txt for documentation. Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-07-24Thumb-2: Implementation of the unified start-up and exceptions codeCatalin Marinas1-7/+21
This patch implements the ARM/Thumb-2 unified kernel start-up and exception handling code. Signed-off-by: Catalin Marinas <[email protected]>
2009-03-13Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into develRussell King1-6/+7
Conflicts: arch/arm/mach-at91/gpio.c
2009-03-03[ARM] 5417/1: Set the correct cacheid for ARMv6 CPUs with ARMv7 style MMUCatalin Marinas1-6/+7
The cacheid_init() function assumes that if cpu_architecture() returns 7, the caches are VIPT_NONALIASING. The cpu_architecture() function returns the version of the supported MMU features (e.g. TEX remapping) but it doesn't make any assumptions about the cache type. The patch adds the checking of the Cache Type Register for the ARMv7 format. Signed-off-by: Catalin Marinas <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-02-19[ARM] 5383/2: unwind: Add core support for ARM stack unwindingCatalin Marinas1-0/+3
This patch adds the main functionality for parsing the stack unwinding information generated by the ARM EABI toolchains. The unwinding information consists of an index with a pair of words per function and a table with unwinding instructions. For more information, see "Exception Handling ABI for the ARM Architecture" at: http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.abi/index.html Signed-off-by: Catalin Marinas <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-02-12[ARM] 5388/1: Add hwcap bits for VFPv3 and VFPv3D16Catalin Marinas1-0/+2
The VFPv3D16 is a VFPv3 CPU configuration where only 16 double registers are present, as the VFPv2 configuration. This patch adds the corresponding hwcap bits so that applications or debuggers have more information about the supported features. Signed-off-by: Catalin Marinas <[email protected]> Signed-off-by: Russell King <[email protected]>
2008-12-01[ARM] use asm/sections.hRussell King1-9/+9
Update to use the asm/sections.h header rather than declaring these symbols ourselves. Change __data_start to _data to conform with the naming found within asm/sections.h. Signed-off-by: Russell King <[email protected]>
2008-11-28Merge branch 'highmem' into develRussell King1-16/+21
Conflicts: arch/arm/mach-clps7500/include/mach/memory.h
2008-11-28[ARM] rationalize memory configuration code some moreNicolas Pitre1-16/+21
Currently there are two instances of struct meminfo: one in kernel/setup.c marked __initdata, and another in mm/init.c with permanent storage. Let's keep only the later to directly populate the permanent version from arm_add_memory(). Also move common validation tests between the MMU and non-MMU cases into arm_add_memory() to remove some duplication. Protection against overflowing the membank array is also moved in there in order to cover the kernel cmdline parsing path as well. Signed-off-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2008-11-06Add HWCAP_NEON to the ARM hwcap.h fileCatalin Marinas1-0/+1
Signed-off-by: Catalin Marinas <[email protected]>
2008-11-06Add "thumbee" to the hwcap_str arrayCatalin Marinas1-0/+1
This part was missed in the initial patch adding ThumbEE support. Signed-off-by: Catalin Marinas <[email protected]>
2008-10-02[ARM] 5274/1: simplify request_standard_resources()Nicolas Pitre1-7/+2
There is no point converting memory bank addresses from physical to virtual just to convert them back to physical addresses. Furthermore this isn't "right" for highmem even if in this case the end result is the correct one. Signed-off-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2008-09-30[ARM] mm: move vmalloc= parsing to arch/arm/mm/mmu.cRussell King1-13/+0
There's no point scattering this around the tree, the parsing of the parameter might as well live beside the code which uses it. That also means we can make vmalloc_reserve a static variable. Signed-off-by: Russell King <[email protected]>
2008-09-25[ARM] Print details relevant to how we handle the cacheRussell King1-0/+9
This replaces the original cache type decoding printks. We now indicate how we're treating the cache which we found, rather than what we found. Signed-off-by: Russell King <[email protected]>
2008-09-25[ARM] Introduce new bitmask based cache type macrosRussell King1-0/+22
Rather than trying to (inaccurately) decode the cache type from the registers each time we need to decide what type of cache we have, use a bitmask initialized early during boot. Since the setup is a one-off initialization, we can be a little more clever and take account of the CPU architecture as well. Note that we continue to achieve the compactness on optimised kernels by forcing tests to always-false or always-true as appropriate, thereby allowing the compiler to do build-time code elimination. Signed-off-by: Russell King <[email protected]>
2008-09-25[ARM] Remove cache type printksRussell King1-141/+1
The cache type register found in ARMv5 and later CPUs changes format and meaning depending on the CPU architecture version. Currently, this code: a) doesn't work for everything - Xscale's are identified as 'unknown 5'. b) is not able to tell whether the caches are VIVT or VIPT from the cache type. c) prints rubbish on some ARMv6 and ARMv7+ CPUs. The two solutions to this are: 1. Add yet more code to decode and print the various different register formats. 2. Remove the code altogther. The code only exists to decode and print the cache parameters. Increasing the complexity of it just for the sake of a few prinks isn't worth it. Signed-off-by: Russell King <[email protected]>
2008-09-06[ARM] clean up a load of old declarationsRussell King1-2/+1
... some of which are now in linux/*.h headers. Signed-off-by: Russell King <[email protected]>
2008-09-06[ARM] move initrd code from kernel/setup.c to mm/init.cRussell King1-37/+0
This quietens some sparse warnings about phys_initrd_start and phys_initrd_size. Signed-off-by: Russell King <[email protected]>
2008-09-05[ARM] sparse: fix several warningsRussell King1-3/+3
arch/arm/kernel/process.c:270:6: warning: symbol 'show_fpregs' was not declared. Should it be static? This function isn't used, so can be removed. arch/arm/kernel/setup.c:532:9: warning: symbol 'len' shadows an earlier one arch/arm/kernel/setup.c:524:6: originally declared here A function containing two 'len's. arch/arm/mm/fault-armv.c:188:13: warning: symbol 'check_writebuffer_bugs' was not declared. Should it be static? arch/arm/mm/mmap.c:122:5: warning: symbol 'valid_phys_addr_range' was not declared. Should it be static? arch/arm/mm/mmap.c:137:5: warning: symbol 'valid_mmap_phys_addr_range' was not declared. Should it be static? Missing includes. arch/arm/kernel/traps.c:71:77: warning: Using plain integer as NULL pointer arch/arm/mm/ioremap.c:355:46: error: incompatible types in comparison expression (different address spaces) Sillies. Signed-off-by: Russell King <[email protected]>
2008-09-01[ARM] cachetype: move definitions to separate headerRussell King1-0/+1
Rather than pollute asm/cacheflush.h with the cache type definitions, move them to asm/cachetype.h, and include this new header where necessary. Signed-off-by: Russell King <[email protected]>
2008-09-01[ARM] cputype: separate definitions, use themRussell King1-22/+23
Add asm/cputype.h, moving functions and definitions from asm/system.h there. Convert all users of 'processor_id' to the more efficient read_cpuid_id() function. Signed-off-by: Russell King <[email protected]>
2008-08-09[ARM] prevent crashing when too much RAM installedLennert Buytenhek1-0/+13
This patch will truncate and/or ignore memory banks if their kernel direct mappings would (partially) overlap with the vmalloc area or the mappings between the vmalloc area and the address space top, to prevent crashing during early boot if there happens to be more RAM installed than we are expecting. Since the start of the vmalloc area is not at a fixed address (but the vmalloc end address is, via the per-platform VMALLOC_END define), a default area of 128M is reserved for vmalloc mappings, which can be shrunk or enlarged by passing an appropriate vmalloc= command line option as it is done on x86. On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe000000, two 512M RAM banks and vmalloc=128M (the default), this patch gives: Truncating RAM at 20000000-3fffffff to -35ffffff (vmalloc region overlap). Memory: 512MB 352MB = 864MB total On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe800000, two 256M RAM banks and vmalloc=768M, this patch gives: Truncating RAM at 00000000-0fffffff to -0e7fffff (vmalloc region overlap). Ignoring RAM at 10000000-1fffffff (vmalloc region overlap). Signed-off-by: Lennert Buytenhek <[email protected]> Tested-by: Riku Voipio <[email protected]>
2008-07-23kgdb: support for ARCH=armJason Wessel1-0/+2
This patch adds the ARCH=arm specific a kgdb backend, originally written by Deepak Saxena <[email protected]> and George Davis <[email protected]>. Geoff Levand <[email protected]>, Nicolas Pitre, Manish Lachwani, and Jason Wessel have contributed various fixups here as well. The KGDB patch makes one change to the core ARM architecture such that the traps are initialized early for use with the debugger or other subsystems. [ [email protected]: small cleanups. ] [ [email protected]: fixed early_trap_init ] Signed-off-by: Jason Wessel <[email protected]> Acked-by: Deepak Saxena <[email protected]>
2008-02-09[ARM] constify function pointer tablesJan Engelhardt1-1/+1
Signed-off-by: Jan Engelhardt <[email protected]> Signed-off-by: Russell King <[email protected]>
2008-02-04Merge branches 'at91', 'ixp', 'master', 'misc', 'pxa' and 'realview' into develRussell King1-30/+3
* at91: [ARM] 4802/1: Fix typo and remove vague comment [ARM] 4660/3: at91: allow selecting UART for early kernel messages [ARM] 4739/1: at91sam9263: make gpio bank C and D irqs work * ixp: [ARM] 4809/2: ixp4xx: Merge dsmg600-power.c into dsmg600-setup.c [ARM] 4808/2: ixp4xx: Merge nas100d-power.c into nas100d-setup.c [ARM] 4807/2: ixp4xx: Merge nslu2-power.c into nslu2-setup.c [ARM] 4806/1: ixp4xx: Ethernet support for the nslu2 and nas100d boards [ARM] 4805/1: ixp4xx: Use leds-gpio driver instead of IXP4XX-GPIO-LED driver [ARM] 4715/2: Ethernet support for IXDP425 boards [ARM] 4714/2: Headers for IXP4xx built-in Ethernet and WAN drivers [ARM] 4713/3: Adds drivers for IXP4xx QMgr and NPE features [ARM] 4712/2: Adds functions to read and write IXP4xx "feature" bits [ARM] 4774/2: ixp4xx: Register dsmg600 rtc i2c_board_info [ARM] 4773/2: ixp4xx: Register nas100d rtc i2c_board_info [ARM] 4772/2: ixp4xx: Register nslu2 rtc i2c_board_info [ARM] 4769/2: ixp4xx: Button updates for the dsmg600 board [ARM] 4768/2: ixp4xx: Button and LED updates for the nas100d board [ARM] 4767/2: ixp4xx: Add bitops.h include to io.h [ARM] 4766/2: ixp4xx: Update ixp4xx_defconfig, enabling all supported boards * master: [ARM] 4810/1: - Fix 'section mismatch' building warnings [ARM] xtime_seqlock: fix more ARM machines for xtime deadlocking [ARM] 21285 serial: fix build error * misc: [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags * pxa: [ARM] 4798/1: pcm027: fix missing header file [ARM] 4803/1: pxa: fix building issue of poodle.c caused by patch 4737/1 [ARM] 4801/1: pxa: fix building issues of missing pxa2xx-regs.h [ARM] pxa: introduce sysdev for pxa3xx static memory controller [ARM] pxa: add preliminary suspend/resume code for pxa3xx [ARM] pxa: introduce sysdev for GPIO register saving/restoring [ARM] pxa: introduce sysdev for IRQ register saving/restoring [ARM] pxa: fix the warning of undeclared "struct pxaohci_platform_data" [ARM] pxa: change set_kset_name() to direct name assignment for MFP sysclass * realview: [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c [ARM] 4820/1: RealView: Select the timer IRQ at run-time [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms [ARM] 4818/1: RealView: Add core-tile detection [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h [ARM] 4815/1: RealView: Add clockevents suport for the local timers [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore [ARM] 4813/1: Add SMP helper functions for clockevents support [ARM] 4812/1: RealView: clockevents support for the RealView platforms [ARM] 4811/1: RealView: clocksource support for the RealView platforms
2008-02-04[ARM] 4736/1: Export atags to userspace and allow kexec to use customised atagsRichard Purdie1-30/+2
Currently, the atags used by kexec are fixed to the ones originally used to boot the kernel. This is less than ideal as changing the commandline, initrd and other options would be a useful feature. This patch exports the atags used for the current kernel to userspace through an "atags" file in procfs. The presence of the file is controlled by its own Kconfig option and cleans up several ifdef blocks into a separate file. The tags for the new kernel are assumed to be at a fixed location before the kernel image itself. The location of the tags used to boot the original kernel is unimportant and no longer saved. Based on a patch from Uli Luckas <[email protected]> Signed-off-by: Richard Purdie <[email protected]> Acked-by: Uli Luckas <[email protected]> Signed-off-by: Russell King <[email protected]>
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