- 30 7月, 2014 1 次提交
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由 Laura Abbott 提交于
Currently, early_init_dt_scan validates the header, sets the boot params, and scans for chosen/memory all in one function. Split this up into two separate functions (validation/setting boot params in one, scanning in another) to allow for additional setup between boot params and scanning the memory. Signed-off-by: NLaura Abbott <lauraa@codeaurora.org> Tested-by: NAndreas Färber <afaerber@suse.de> [glikely: s/early_init_dt_scan_all/early_init_dt_scan_nodes/] Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 27 6月, 2014 1 次提交
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由 Laura Abbott 提交于
The common early_init_dt_add_memory_arch takes the base and size of a memory region as u64 types. The function never checks if the base and size can actually fit in a phys_addr_t which may be smaller than 64-bits. This may result in incorrect memory being passed to memblock_add if the memory falls outside the range of phys_addr_t. Add range checks for the base and size if phys_addr_t is smaller than u64. Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org> Tested-by: NGeert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: NLaura Abbott <lauraa@codeaurora.org> Acked-by: NNicolas Pitre <nico@linaro.org> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 23 5月, 2014 2 次提交
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由 Leif Lindholm 提交于
In order to deal with an firmware bug on a specific ppc32 platform (longtrail), early_init_dt_scan_memory() looks for a node called memory@0 on all platforms. Restrict this quirk to ppc32 kernels only. Signed-off-by: NLeif Lindholm <leif.lindholm@linaro.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org
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由 Thierry Reding 提交于
Commit 44856819 (of/fdt: Clean up casting in unflattening path) modified unflatten_dt_node() to take a void * for the mem parameter instead of an unsigned long. One of the call sites wasn't updated. Signed-off-by: NThierry Reding <treding@nvidia.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org> Conflicts: drivers/of/fdt.c
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- 21 5月, 2014 1 次提交
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由 Rob Herring 提交于
This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: NRob Herring <robh@kernel.org> Acked-by: NGrant Likely <grant.likely@linaro.org>
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- 30 4月, 2014 10 次提交
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由 Rob Herring 提交于
Now that all accesses to FDT header data has been converted to accessor helpers, initial_boot_params can become an opaque pointer. Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
Add a wrapper function to retrieve the FDT size from the FDT header. This is primarily to avoid libfdt include paths for the whole kernel. Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
Fix warnings in early_init_dt_reserve_memory_arch when phys_addr_t is 32-bit and memblock is not enabled. Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
Move the /memreserve/ processing and dtb memory reservations into early_init_fdt_scan_reserved_mem. This converts arm, arm64, and powerpc as they are the only users of early_init_fdt_scan_reserved_mem. memblock_reserve is safe to call on the same region twice, so the reservation check for the dtb in powerpc 32-bit reservations is safe to remove. Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
Both powerpc and microblaze have the same FDT blob in debugfs feature. Move this to common location and remove the powerpc and microblaze implementations. This feature could become more useful when FDT overlay support is added. This changes the path of the blob from "$arch/flat-device-tree" to "device-tree/flat-device-tree". Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: NRob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: NMichal Simek <michal.simek@xilinx.com> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
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: NRob Herring <robh@kernel.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
of_scan_flat_dt_by_path is unused anywhere in the kernel, so remove it. Signed-off-by: NRob Herring <robh@kernel.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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由 Rob Herring 提交于
Whatever needed powerpc machdep.h appears to have been removed, so the include can be dropped. module.h is not needed as this code is always built-in. Signed-off-by: NRob Herring <robh@kernel.org> Cc: Grant Likely <grant.likely@linaro.org> Tested-by: NMichal Simek <michal.simek@xilinx.com> Tested-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NStephen Chivers <schivers@csc.com>
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- 15 4月, 2014 1 次提交
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由 Xiubo Li 提交于
In tag next-20140407, building with CONFIG_DEBUG_SECTION_MISMATCH enabled, the following WARNING is occured: WARNING: drivers/built-in.o(.text.unlikely+0x2220): Section mismatch in reference from the function __reserved_mem_check_root() to the function .init.text:of_get_flat_dt_prop() The function __reserved_mem_check_root() references the function __init of_get_flat_dt_prop(). This is often because __reserved_mem_check_root lacks a __init annotation or the annotation of of_get_flat_dt_prop is wrong. WARNING: vmlinux.o(.text.unlikely+0xb9d0): Section mismatch in reference from the function __reserved_mem_check_root() to the (unknown reference) .init.data:(unknown) The function __reserved_mem_check_root() references the (unknown reference) __initdata (unknown). This is often because __reserved_mem_check_root lacks a __initdata annotation or the annotation of (unknown) is wrong. This is cause by : 'drivers: of: add initialization code for dynamic reserved memory'. Signed-off-by: NXiubo Li <Li.Xiubo@freescale.com> Signed-off-by: NRob Herring <robh@kernel.org>
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- 19 3月, 2014 1 次提交
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由 Pantelis Antoniou 提交于
After the move to having device nodes be proper kobjects the lifecycle of the node needs to be controlled better. At first convert of_add_node() in the unflattened functions to of_init_node() which initializes the kobject so that of_node_get/put work correctly even before of_init is called. Afterwards introduce of_node_is_initialized & of_node_is_attached that query the underlying kobject about the state (attached means kobj is visible in sysfs) Using that make sure the lifecycle of the tree is correct at all times. Signed-off-by: NPantelis Antoniou <panto@antoniou-consulting.com> [grant.likely: moved of_node_init() calls, fixed up locking, and dropped __of_populate() hunks] Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 15 3月, 2014 1 次提交
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由 Josh Cartwright 提交于
When the reserved memory patches hit -next, several legacy (non-DT) boot failures were detected and bisected down to that commit. There needs to be some sanity checking whether a DT is even present before parsing the reserved ranges. Reported-by: NKevin Hilman <khilman@linaro.org> Signed-off-by: NJosh Cartwright <joshc@codeaurora.org> Tested-by: NKevin Hilman <khilman@linaro.org> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 12 3月, 2014 3 次提交
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由 Grant Likely 提交于
Device tree nodes are already treated as objects, and we already want to expose them to userspace which is done using the /proc filesystem today. Right now the kernel has to do a lot of work to keep the /proc view in sync with the in-kernel representation. If device_nodes are switched to be kobjects then the device tree code can be a whole lot simpler. It also turns out that switching to using /sysfs from /proc results in smaller code and data size, and the userspace ABI won't change if /proc/device-tree symlinks to /sys/firmware/devicetree/base. v7: Add missing sysfs_bin_attr_init() v6: Add __of_add_property() early init fixes from Pantelis v5: Rename firmware/ofw to firmware/devicetree Fix updating property values in sysfs v4: Fixed build error on Powerpc Fixed handling of dynamic nodes on powerpc v3: Fixed handling of duplicate attribute and child node names v2: switch to using sysfs bin_attributes which solve the problem of reporting incorrect property size. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Tested-by: NSascha Hauer <s.hauer@pengutronix.de> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David S. Miller <davem@davemloft.net> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
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由 Marek Szyprowski 提交于
This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Marek Szyprowski 提交于
This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 11 12月, 2013 1 次提交
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由 James Hogan 提交于
Check whether initial_boot_params is NULL before dereferencing it in unflatten_and_copy_device_tree() for the case where no device tree is available but the arch can still boot to a minimal usable system without it. In this case also log a warning for when the kernel log buffer is obtainable. Signed-off-by: NJames Hogan <james.hogan@imgtec.com> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 14 10月, 2013 1 次提交
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由 Grant Likely 提交于
This reverts commit 109b6236. Tim Bird expressed concern that this will have a bad effect on boot time, and while simple tests have shown it to be okay with simple tree, a device tree blob can potentially be quite large and add_device_randomness() is not a fast function. Rather than do this for all platforms unconditionally, I'm reverting this patch and would like to see it revisited. Instead of feeding the entire tree into the random pool, it would probably be appropriate to hash the tree and feed the hash result into the pool. There really isn't a lot of randomness in a device tree anyway. In the majority of cases only a handful of properties are going to be different between machines with the same baseboard. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 10 10月, 2013 5 次提交
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由 Rob Herring 提交于
Introduce common of_flat_dt_match_machine and of_flat_dt_get_machine_name functions to unify architectures' handling of machine level model and compatible properties. Several architectures match the root compatible string with an arch specific list of machine descriptors duplicating the same search algorithm. Create a common implementation with a simple architecture specific hook to iterate over each machine's match table. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NGrant Likely <grant.likely@linaro.org>
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由 Rob Herring 提交于
All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NVineet 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: NGrant Likely <grant.likely@linaro.org>
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由 Rob Herring 提交于
Create a weak version of early_init_dt_add_memory_arch which uses memblock. This will unify all architectures except ones with custom memory bank structs. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Jonas Bonn <jonas@southpole.se> Acked-by: NGrant Likely <grant.likely@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux@lists.openrisc.net Cc: devicetree@vger.kernel.org
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由 Rob Herring 提交于
Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NGrant Likely <grant.likely@linaro.org>
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由 Rob Herring 提交于
Several architectures using DT support built-in dtb's in the init section. These platforms need to copy the dtb from init since the strings are referenced after unflattening. Every arch has their own copying routine which do the same thing. Create a common function, unflatten_and_copy_device_tree, to copy the dtb when unflattening the dtb. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NGrant Likely <grant.likely@linaro.org>
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- 30 8月, 2013 3 次提交
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由 Anton Blanchard 提交于
We feed the entire DMI table into the random pool to provide better random data during early boot, so do the same with the flattened device tree. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Grant Likely 提交于
The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Grant Likely 提交于
Patch 9e401275, "of: fdt: fix memory initialization for expanded DT" fixed incomplete clearing of memory when unflattening the device tree. However the code was already clearing some of the memory, it just wasn't doing so for all allocations. Now that the memory is cleared right at the point of allocation, the memset after unflatten_dt_alloc() is redundant. Remove it. Signed-off-by: NGrant Likely <grant.likely@linaro.org> Acked-by: NWladislav Wiebe <wladislav.kw@gmail.com>
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- 29 8月, 2013 1 次提交
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由 Grant Likely 提交于
Most architectures use the same implementation. Collapse the common ones into a single weak function that can be overridden. Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 27 8月, 2013 1 次提交
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由 Marek Szyprowski 提交于
Add a function to scan the flattened device-tree starting from the node given by the path. It is used to extract information (like reserved memory), which is required on early boot before we can unflatten the tree. Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Acked-by: NMichal Nazarewicz <mina86@mina86.com> Acked-by: NTomasz Figa <t.figa@samsung.com> Reviewed-by: NRob Herring <rob.herring@calxeda.com>
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- 22 8月, 2013 1 次提交
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由 Wladislav Wiebe 提交于
Already existing property flags are filled wrong for properties created from initial FDT. This could cause problems if this DYNAMIC device-tree functions are used later, i.e. properties are attached/detached/replaced. Simply dumping flags from the running system show, that some initial static (not allocated via kzmalloc()) nodes are marked as dynamic. I putted some debug extensions to property_proc_show(..) : .. + if (OF_IS_DYNAMIC(pp)) + pr_err("DEBUG: xxx : OF_IS_DYNAMIC\n"); + if (OF_IS_DETACHED(pp)) + pr_err("DEBUG: xxx : OF_IS_DETACHED\n"); when you operate on the nodes (e.g.: ~$ cat /proc/device-tree/*some_node*) you will see that those flags are filled wrong, basically in most cases it will dump a DYNAMIC or DETACHED status, which is in not true. (BTW. this OF_IS_DETACHED is a own define for debug purposes which which just make a test_bit(OF_DETACHED, &x->_flags) If nodes are dynamic kernel is allowed to kfree() them. But it will crash attempting to do so on the nodes from FDT -- they are not allocated via kzmalloc(). Signed-off-by: NWladislav Wiebe <wladislav.kw@gmail.com> Acked-by: NAlexander Sverdlin <alexander.sverdlin@nsn.com> Cc: stable@vger.kernel.org Signed-off-by: NRob Herring <rob.herring@calxeda.com>
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- 24 7月, 2013 1 次提交
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由 Santosh Shilimkar 提交于
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/2012/9/13/544Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NVineet Gupta <vgupta@synopsys.com> Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 18 6月, 2013 1 次提交
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由 Robert P. J. Day 提交于
Fix "/aliasas" typo in comments, no functional change. Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 18 12月, 2012 1 次提交
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由 Andy Shevchenko 提交于
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 30 11月, 2012 1 次提交
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由 Randy Dunlap 提交于
ERROR: "allnodes" [drivers/w1/masters/w1-gpio.ko] undefined! Signed-off-by: NRandy Dunlap <rdunlap@infradead.org> [grant.likely: allnodes is too generic; rename to of_allnodes] Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Cc: Ville Syrjala <syrjala@sci.fi>
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- 21 11月, 2012 2 次提交
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由 Catalin Marinas 提交于
Commit 509b7455 (of/fdt: Don't copy garbage after "/" in root node path) sets the path length to 0 to ignore any garbage after "/" in the root node path. This has the side effect of also ignoring '\0' at the end of the root node path. This patch sets the ignores the garbage by setting the last character to '\0' and length to 1. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NRob Herring <rob.herring@calxeda.com>
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由 Fabio Estevam 提交于
Constify 'pathp' in order to get rid of the following warning: drivers/of/fdt.c:491:10: warning: assignment discards 'const' qualifier from pointer target type [enabled by default] Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com> [Rob Herring: also constify np and lp] Signed-off-by: NRob Herring <rob.herring@calxeda.com>
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