- 12 11月, 2011 1 次提交
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由 Will Deacon 提交于
setup_processor copies the arch_name and elf_name fields out of the selected proc_info_list into two fixed size buffers. Since the proc_info_list structure is defined in a proc_*.S assembly file, this can lead to subtle errors if the strings defined there are too long (for example, corrupting the machine ID). This patch uses snprintf instead of sprintf to ensure that these buffers are not overrun. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 01 11月, 2011 1 次提交
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由 Paul Gortmaker 提交于
Many of the core ARM kernel files are not modules, but just including module.h for exporting symbols. Now these files can use the lighter footprint export.h for this role. There are probably lots more, but ARM files of mach-* and plat-* don't get coverage via a simple yesconfig build. They will have to be cleaned up and tested via using their respective configs. Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
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- 17 10月, 2011 3 次提交
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由 Will Deacon 提交于
The Cache Type Register L1Ip field identifies I-caches with a PIPT policy using the encoding 11b. This patch extends the cache policy parsing to identify PIPT I-caches correctly and prevent them from being treated as VIPT aliasing in cases where they are sufficiently large. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
Get rid of the mdesc pointer in the fixup function call. No one uses the mdesc pointer, it shouldn't be modified anyway, and we can't wrap it, so let's remove it. Platform files found by: $ regexp=$(git grep -h '\.fixup.*=' arch/arm | sed 's!.*= *\([^,]*\),* *!\1!' | sort -u | tr '\n' '|' | sed 's,|$,,;s,|,\\|,g') $ git grep $regexp arch/arm Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Dave Martin 提交于
The CPU architecture really should not be changing at runtime, so make it a global variable instead of a function. The cpu_architecture() function declared in <asm/system.h> remains the correct way to read this variable from C code. Signed-off-by: NDave Martin <dave.martin@linaro.org> Reviewed-by: NJon Medhurst <tixy@yxit.co.uk> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 22 8月, 2011 2 次提交
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由 Nicolas Pitre 提交于
Now that there is no more users, we can remove it from the kernel. Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org> Acked-by: NArnd Bergmann <arnd@arndb.de>
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由 Nicolas Pitre 提交于
The boot_params member of the mdesc structure is used to provide a default physical address for the ATAG list. Since this value is fixed at compile time and sometimes based on constants such as ARCH_PHYS_OFFSET, it gets in the way of runtime PHYS_OFFSET and CONFIG_ARM_PATCH_PHYS_VIRT usage. Let's introduce atag_offset which should contains only the relative offset from PHYS_OFFSET instead of an absolute value, in preparation to move all instance of boot_params over to it. Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org> Tested-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Tested-by: NPetr Štetiar <ynezz@true.cz> Acked-by: NArnd Bergmann <arnd@arndb.de>
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- 12 8月, 2011 1 次提交
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由 Will Deacon 提交于
The current cache detection code does not check for an aliasing I-cache if the D-cache is found to be VIPT aliasing. This patch fixes the problem by always checking for an aliasing I-cache on v6 and later. Signed-off-by: NWill Deacon <will.deacon@arm.com>
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- 19 7月, 2011 1 次提交
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由 Nicolas Pitre 提交于
Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>
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- 08 7月, 2011 1 次提交
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由 Will Deacon 提交于
Modern ARMv7-A cores can optionally implement these new hardware features: - VFPv4: The latest version of the ARMv7 vector floating-point extensions, including hardware support for fused multiple accumulate. D16 or D32 variants may be implemented. - Integer divide: The SDIV and UDIV instructions provide signed and unsigned integer division in hardware. When implemented, these instructions may be available in either both Thumb and ARM, or Thumb only. This patch adds new HWCAP defines to describe these new features. The integer divide capabilities are split into two bits for ARM and Thumb respectively. Whilst HWCAP_IDIVA should never be set if HWCAP_IDIVT is clear, separating the bits makes it easier to interpret from userspace. Signed-off-by: NWill Deacon <will.deacon@arm.com>
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- 06 7月, 2011 1 次提交
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由 Russell King 提交于
Ensure that the meminfo array is sanity checked before we pass the memory to memblock. This helps to ensure that memblock and meminfo agree on the dimensions of memory, especially when more memory is passed than the kernel can deal with. Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 24 6月, 2011 1 次提交
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由 Russell King 提交于
cpu_proc_init() does processor specific initialization, which we do at boot time. We have been omitting to do this on resume, which causes some of this initialization to be skipped. We've also been skipping this on SMP initialization too. Ensure that cpu_proc_init() is always called appropriately by moving it into cpu_init(), and move cpu_init() to a more appropriate point in the boot initialization. Tested-by: NKevin Hilman <khilman@ti.com> Acked-by: NJean Pihet <j-pihet@ti.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 23 5月, 2011 2 次提交
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由 Grant Likely 提交于
If a dtb is passed to the kernel then the kernel needs to iterate through compiled-in mdescs looking for one that matches and move the dtb data to a safe location before it gets accidentally overwritten by the kernel. This patch creates a new function, setup_machine_fdt() which is analogous to the setup_machine_atags() created in the previous patch. It does all the early setup needed to use a device tree machine description. v5: - Print warning with neither dtb nor atags are passed to the kernel - Fix bug in setting of __machine_arch_type to the selected machine, not just the last machine in the list. Reported-by: NTixy <tixy@yxit.co.uk> - Copy command line directly into boot_command_line instead of cmd_line v4: - Dump some output when a matching machine_desc cannot be found v3: - Added processing of reserved list. - Backed out the v2 change that copied instead of reserved the dtb. dtb is reserved again and the real problem was fixed by using alloc_bootmem_align() for early allocation of RAM for unflattening the tree. - Moved cmd_line and initrd changes to earlier patch to make series bisectable. v2: Changed to save the dtb by copying into an allocated buffer. - Since the dtb will very likely be passed in the first 16k of ram where the interrupt vectors live, memblock_reserve() is insufficient to protect the dtb data. [based on work originally written by Jeremy Kerr <jeremy.kerr@canonical.com>] Tested-by: NTony Lindgren <tony@atomide.com> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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由 Grant Likely 提交于
In preparation for adding device tree support, this patch consolidates all of the atag-specific setup into a single function. v5: - drop double printk("Machine; %s\n", ...); call. - leave copying boot_command_line in setup_arch() since it isn't atags specific. v4: - adapt to the removal of lookup_machine_type() - break out dump of machine_desc table into dump_machine_table() because the device tree probe code will use it. - Add for_each_machine_desc() macro Tested-by: NTony Lindgren <tony@atomide.com> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 12 5月, 2011 1 次提交
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由 Victor Boivie 提交于
This patch allows the provided CONFIG_CMDLINE to be concatenated with the one provided by the boot loader. This is useful to merge the static values defined in CONFIG_CMDLINE with the boot loader's (possibly) more dynamic values, such as startup reasons and more. Signed-off-by: NVictor Boivie <victor.boivie@sonyericsson.com> Reviewed-by: NBjorn Andersson <bjorn.andersson@sonyericsson.com> Signed-off-by: NOskar Andero <oskar.andero@sonyericsson.com> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 11 5月, 2011 1 次提交
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由 Grant Likely 提交于
Add some basic empty infrastructure for DT support on ARM. v5: - Fix off-by-one error in size calculation of initrd - Stop mucking with cmd_line, and load command line from dt into boot_command_line instead which matches the behaviour of ATAGS booting v3: - moved cmd_line export and initrd setup to this patch to make the series bisectable. - switched to alloc_bootmem_align() for allocation when unflattening the device tree. memblock_alloc() was not the right interface. Signed-off-by: NJeremy Kerr <jeremy.kerr@canonical.com> Tested-by: NTony Lindgren <tony@atomide.com> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 24 3月, 2011 1 次提交
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由 Olaf Hering 提交于
crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn The Xen PV drivers in a crashed HVM guest can not connect to the dom0 backend drivers because both frontend and backend drivers are still in connected state. To run the connection reset function only in case of a crashdump, the is_kdump_kernel() function needs to be available for the PV driver modules. Consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn into kernel/crash_dump.c Also export elfcorehdr_addr to make is_kdump_kernel() usable for modules. Leave 'elfcorehdr' as early_param(). This changes powerpc from __setup() to early_param(). It adds an address range check from x86 also on ia64 and powerpc. [akpm@linux-foundation.org: additional #includes] [akpm@linux-foundation.org: remove elfcorehdr_addr export] [akpm@linux-foundation.org: fix for Tejun's mm/nobootmem.c changes] Signed-off-by: NOlaf Hering <olaf@aepfle.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 24 2月, 2011 2 次提交
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由 Nicolas Pitre 提交于
The initial MMU table created in head.S contains a 1 MB mapping at the start of memory to let the early kernel boot code access the boot params specified by mdesc->boot_params. When using CONFIG_ARM_PATCH_PHYS_VIRT it is possible for the kernel to have a different idea of where the start of memory is at run time, making the compile-time determined mdesc->boot_params pointing to a memory area which is not mapped. Any access to the boot params in that case will fault and silently hang the kernel at that point. It is therefore a better idea to simply ignore mdesc->boot_params in that case and give the kernel a chance to print some diagnostic on the console later. If the bootloader provides a valid pointer in r2 to the kernel then this is used instead of mdesc->boot_params, and an explicit mapping is already created in the initial MMU table for it. It is therefore a good idea to use that facility when using a relocated kernel. Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Nicolas Pitre 提交于
Since commit 6fc31d54 there is no callers for lookup_machine_type() other than setup_machine(). And if the former fails it won't return, therefore the error path in the later is dead code. Let's clean things up by merging them together. Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 22 2月, 2011 1 次提交
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由 Will Deacon 提交于
The unsigned long datatype is not sufficient for mapping physical addresses >= 4GB. This patch ensures that the phys_addr_t datatype is used to represent the start address of a membank, which may reside above the 4GB boundary. Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 19 2月, 2011 1 次提交
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由 Catalin Marinas 提交于
If ID_MMFR0[3:0] >= 3, the architecture version is ARMv7. The code was currently only testing for ID_MMFR0[3:0] == 3. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 18 2月, 2011 1 次提交
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由 Russell King 提交于
As PHYS_OFFSET will be becoming a variable, we can't have it used in initializers nor assembly code. Replace those in generic code with a run-time initialization. Replace those in platform code using the individual platform specific PLAT_PHYS_OFFSET. Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Acked-by: NTony Lindgren <tony@atomide.com> Acked-by: NKukjin Kim <kgene.kim@samsung.com> Acked-by: NDavid Brown <davidb@codeaurora.org> Acked-by: NEric Miao <eric.y.miao@gmail.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 16 2月, 2011 1 次提交
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由 Russell King 提交于
Since the debug macros no longer depend on the machine type information, the machine type lookup can be deferred to setup_arch() in setup.c which simplifies the code somewhat. We also move the __error_a functionality into setup.c for displaying a message when a bad machine ID is passed to the kernel via the LL debug code. We also log this into the kernel ring buffer which makes it possible to retrieve the message via a debugger. Original idea from Grant Likely. Acked-by: NGrant Likely <grant.likely@secretlab.ca> Tested-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 15 2月, 2011 1 次提交
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由 Will Deacon 提交于
For the Kernel to support 2 level and 3 level page tables, physical addresses (and also page table entries) need to be 32 or 64-bits depending upon the configuration. This patch uses the %08llx conversion specifier for physical addresses and page table entries, ensuring that they are cast to (long long) so that common code can be used regardless of the datatype widths. Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 15 1月, 2011 1 次提交
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由 Dima Zavin 提交于
Do not use memory bank info to request the "system ram" resources as they do not track holes created by memblock_remove inside machine's reserve callback. If the removed memory is passed as platform_device's ioresource, then drivers that call request_mem_region would fail due to a conflict with the incorrectly configured system ram resource. Instead, iterate through the regions of memblock.memory and add those as "System RAM" resources. Signed-off-by: NDima Zavin <dima@android.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 12 1月, 2011 1 次提交
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由 Alexander Holler 提交于
When CONFIG_CMDLINE_FORCE is used, the warning Ignoring unrecognised tag 0x54410009 was displayed. Change this to Ignoring tag cmdline (using the default kernel command line) Signed-off-by: NAlexander Holler <holler@ahsoftware.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 24 12月, 2010 3 次提交
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由 Russell King 提交于
This allows platforms to hook into the initialization early to setup things like scheduler clocks, etc. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
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: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 eric miao 提交于
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: NEric Miao <eric.miao@canonical.com> Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 05 12月, 2010 1 次提交
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 08 10月, 2010 2 次提交
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由 Russell King 提交于
Use _sdata as the start of the data section, rather than _data. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Linus Walleij 提交于
The kernel does not compile for my ARM926EJ-S system U300 due to the isb instruction inserted in generic assember statement from commit 8925ec4c, "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: NWill Deacon <will.deacon@arm.com> Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 05 10月, 2010 2 次提交
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由 Will Deacon 提交于
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: NWill Deacon <will.deacon@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
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: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 27 7月, 2010 2 次提交
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
Acked-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 16 7月, 2010 1 次提交
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由 Russell King 提交于
Everything should now be using sparsemem rather than discontigmem, so remove the code supporting discontigmem from ARM. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 09 7月, 2010 3 次提交
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由 Mika Westerberg 提交于
This parameter is used by primary kernel to pass address of vmcore header to the dump capture kernel. Signed-off-by: NMika Westerberg <ext-mika.1.westerberg@nokia.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Mika Westerberg 提交于
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: NMika Westerberg <ext-mika.1.westerberg@nokia.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Tony Lindgren 提交于
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 <jamie@shareable.org>. Also the __switch_to code is optimized out in most cases as suggested by Nicolas Pitre <nico@fluxnic.net>. Reviewed-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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