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2014-03-26MIPS: lib: strlen_user: Use macro to build the strlen_user symbolMarkos Chandras1-6/+10
Build the __strlen_user symbol using a macro. In EVA mode we will need to use similar code to do the userspace load operations so it is better if we use a macro to avoid code duplications. Signed-off-by: Markos Chandras <[email protected]>
2014-03-26MIPS: lib: strnlen_user: Add EVA supportMarkos Chandras1-0/+20
In non-EVA mode, a strlen_user* alias is used for the strlen_kernel* symbols since the code is identical. In EVA mode, a new strlen_user* symbol is used which uses the EVA specific instructions to load values from userspace. Signed-off-by: Markos Chandras <[email protected]>
2014-03-26MIPS: lib: strnlen_user: Use macro to build the strnlen_user symbolMarkos Chandras1-6/+10
Build the __strnlen_user symbol using a macro. In EVA mode we will need to use similar code to do the userspace load operations so it is better if we use a macro to avoid code duplications. Signed-off-by: Markos Chandras <[email protected]>
2014-01-24mips: delete non-required instances of include <linux/init.h>Paul Gortmaker1-1/+0
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <[email protected]> Signed-off-by: John Crispin <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/6320/
2013-07-14MIPS: Delete __cpuinit/__CPUINIT usage from MIPS codePaul Gortmaker1-1/+1
commit 3747069b25e419f6b51395f48127e9812abc3596 upstream. The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. Note that some harmless section mismatch warnings may result, since notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c) and are flagged as __cpuinit -- so if we remove the __cpuinit from the arch specific callers, we will also get section mismatch warnings. As an intermediate step, we intend to turn the linux/init.h cpuinit related content into no-ops as early as possible, since that will get rid of these warnings. In any case, they are temporary and harmless. Here, we remove all the MIPS __cpuinit from C code and __CPUINIT from asm files. MIPS is interesting in this respect, because there are also uasm users hiding behind their own renamed versions of the __cpuinit macros. [1] https://lkml.org/lkml/2013/5/20/589 [[email protected]: Folded in Paul's followup fix.] Signed-off-by: Paul Gortmaker <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/5494/ Patchwork: https://patchwork.linux-mips.org/patch/5495/ Patchwork: https://patchwork.linux-mips.org/patch/5509/ Signed-off-by: Ralf Baechle <[email protected]>
2013-05-16Revert "MIPS: Allow ASID size to be determined at boot time."David Daney2-7/+5
This reverts commit d532f3d26716a39dfd4b88d687bd344fbe77e390. The original commit has several problems: 1) Doesn't work with 64-bit kernels. 2) Calls TLBMISS_HANDLER_SETUP() before the code is generated. 3) Calls TLBMISS_HANDLER_SETUP() twice in per_cpu_trap_init() when only one call is needed. [[email protected]: Also revert the bits of the ASID patch which were hidden in the KVM merge.] Signed-off-by: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Cc: "Steven J. Hill" <[email protected]> Cc: David Daney <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/5242/ Signed-off-by: Ralf Baechle <[email protected]>
2013-05-09Merge branch 'mti-next' of ↵Ralf Baechle6-55/+84
git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
2013-05-09MIPS: microMIPS: Optimise 'strnlen' core library function.Steven J. Hill1-1/+1
Optimise 'strnlen' to use microMIPS instructions and/or optimisations for binary size reduction. When the microMIPS ISA is not being used, the library function compiles to the original binary code. Signed-off-by: Steven J. Hill <[email protected]>
2013-05-09MIPS: microMIPS: Optimise 'strlen' core library function.Steven J. Hill1-4/+5
Optimise 'strlen' to use microMIPS instructions and/or optimisations for binary size reduction. When the microMIPS ISA is not being used, the library function compiles to the original binary code. Signed-off-by: Steven J. Hill <[email protected]>
2013-05-09MIPS: microMIPS: Optimise 'strncpy' core library function.Steven J. Hill1-15/+17
Optimise 'strncpy' to use microMIPS instructions and/or optimisations for binary size reduction. When the microMIPS ISA is not being used, the library function compiles to the original binary code. Signed-off-by: Steven J. Hill <[email protected]>
2013-05-09MIPS: microMIPS: Optimise 'memset' core library function.Steven J. Hill1-30/+54
Optimise 'memset' to use microMIPS instructions and/or optimisations for binary size reduction. When the microMIPS ISA is not being used, the library function compiles to the original binary code. Signed-off-by: Steven J. Hill <[email protected]>
2013-05-08MIPS: Allow ASID size to be determined at boot time.Steven J. Hill2-5/+7
Original patch by Ralf Baechle and removed by Harold Koerfgen with commit f67e4ffc79905482c3b9b8c8dd65197bac7eb508. This allows for more generic kernels since the size of the ASID and corresponding masks can be determined at run-time. This patch is also required for the new Aptiv cores and has been tested on Malta and Malta Aptiv platforms. [[email protected]: Added relevant part of fix https://patchwork.linux-mips.org/patch/5213/] Signed-off-by: Steven J. Hill <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
2013-05-08Merge branch 'mips-next-3.10' of ↵Ralf Baechle1-7/+7
git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next
2013-05-08MIPS: Remove unneeded volatile from arch/mips/lib/bitops.cDavid Daney1-7/+7
The operations on the bitmap pointers are protected by "memory" clobbering raw_local_irq_{save,restore}(), so there is no need for volatile here. By removing the volatile we get better code generation out of the compiler. Signed-off-by: David Daney <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/4966/ Acked-by: John Crispin <[email protected]>
2013-04-11MIPS: Get rid of the use of .macro in C code.Ralf Baechle1-65/+84
It fails with LTO and probably has always been a fragile. Signed-off-by: Ralf Baechle <[email protected]>
2013-03-12MIPS: Fix logic errors in bitops.cDavid Daney1-8/+8
commit 92d11594f6 (MIPS: Remove irqflags.h dependency from bitops.h) factored some of the bitops code out into a separate file (arch/mips/lib/bitops.c). Unfortunately the logic converting a bit mask into a boolean result was lost in some of the functions. We had: int res; unsigned long shifted_result_bit; . . . res = shifted_result_bit; return res; Which truncates off the high 32 bits (thus yielding an incorrect value) on 64-bit systems. The manifestation of this is that a non-SMP 64-bit kernel will not boot as the bitmap operations in bootmem.c are all screwed up. Signed-off-by: David Daney <[email protected]> Cc: [email protected] Cc: Jim Quinlan <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/4965/ Signed-off-by: Ralf Baechle <[email protected]>
2013-03-12MIPS: Use CONFIG_CPU_MIPSR2 in csum_partial.SGabor Juhos1-2/+2
The csum_partial implementation contain optimalizations for the MIPS R2 instruction set. This optimization is never enabled however because the if directive uses the CPU_MIPSR2 constant which is not defined anywhere. Use the CONFIG_CPU_MIPSR2 constant instead. Signed-off-by: Gabor Juhos <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/4971/ Signed-off-by: Ralf Baechle <[email protected]>
2013-02-01MIPS: Whitespace cleanup.Ralf Baechle10-50/+50
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <[email protected]>
2013-01-22MIPS: delay.c: Check BITS_PER_LONG instead of __SIZEOF_LONG__Geert Uytterhoeven1-1/+1
When building a 32-bit kernel for RBTX4927 with gcc version 4.1.2 20061115 (prerelease) (Ubuntu 4.1.1-21), I get: arch/mips/lib/delay.c:24:5: warning: "__SIZEOF_LONG__" is not defined As a consequence, __delay() always uses the 64-bit "dsubu" instruction. Replace the check for "__SIZEOF_LONG__ == 4" by "BITS_PER_LONG == 32" to fix this. Introduced by commit 5210edcd527773c227465ad18e416a894966324f [MIPS: Make __{,n,u}delay declarations match definitions and generic delay.h"] Signed-off-by: Geert Uytterhoeven <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/4678/ Acked-by: David Daney <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
2012-11-23MIPS: Fix crash that occurs when function tracing is enabledAl Cooper1-4/+4
A recent patch changed some irq routines from inlines to functions. These routines are called by the tracer code. Now that they're functions, if they are compiled for function tracing they will call the tracer and crash the system due to infinite recursion. The fix disables tracing in these functions by using "notrace" in the function definition. Signed-off-by: Al Cooper <[email protected]> Reviewed-by: David Daney <[email protected]> Pathchwork: https://patchwork.linux-mips.org/patch/4564/ Signed-off-by: Ralf Baechle <[email protected]>
2012-11-09MIPS: Make irqflags.h functions preempt-safe for non-mipsr2 cpusJim Quinlan2-1/+178
For non MIPSr2 processors, such as the BMIPS 5000, calls to arch_local_irq_disable() and others may be preempted, and in doing so a stale value may be restored to c0_status. This fix disables preemption for such processors prior to the call and enables it after the call. Those functions that needed this fix have been "outlined" to mips-atomic.c, as they are no longer good candidates for inlining. This bug was observed in a BMIPS 5000, occuring once every few hours in a continuous reboot test. It was traced to the write_lock_irq() function which was being invoked in release_task() in exit.c. By placing a number of "nops" inbetween the mfc0/mtc0 pair in arch_local_irq_disable(), which is called by write_lock_irq(), we were able to greatly increase the occurance of this bug. Similarly, the application of this commit silenced the bug. Signed-off-by: Jim Quinlan <[email protected]> Cc: [email protected] Cc: David Daney <[email protected]> Cc: Kevin Cernekee [email protected] Cc: Jim Quinlan <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/4321/ Signed-off-by: Ralf Baechle <[email protected]>
2012-11-09MIPS: Remove irqflags.h dependency from bitops.hJim Quinlan2-1/+180
The "else clause" of most functions in bitops.h invoked raw_local_irq_{save,restore}() and in doing so had a dependency on irqflags.h. This fix moves said code to bitops.c, removing the dependency. Signed-off-by: Jim Quinlan <[email protected]> Cc: [email protected] Cc: David Daney <[email protected]> Cc: Kevin Cernekee [email protected] Cc: Jim Quinlan <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/4320/ Signed-off-by: Ralf Baechle <[email protected]>
2012-10-17MIPS: Restore pagemask after dumping the TLB.Ralf Baechle1-1/+3
Or bad things might happen if the last TLB entry isn't a basic size page. Signed-off-by: Ralf Baechle <[email protected]>
2012-10-16MIPS: Make __{,n,u}delay declarations match definitions and generic delay.hDavid Daney1-1/+5
At some recent point arch/mips/include/asm/delay.h has started being included into csrc-octeon.c where the __?delay() functions are defined. This causes a compile failure due to conflicting declarations and definitions of the functions. It turns out that the generic definitions in arch/mips/lib/delay.c also conflict. Proposed fix: Declare the functions to take unsigned long parameters just like asm-generic (and x86) does. Update __delay to agree (__ndelay and __udelay need no change). Bonus: Get rid of 'inline' from __delay() definition, as it is globally visible, and the compiler should be making this decision itself (it does in fact inline the function without being told to). Signed-off-by: David Daney <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/4354/ Signed-off-by: Ralf Baechle <[email protected]>
2012-08-22MIPS: introduce CPU_GENERIC_DUMP_TLBFlorian Fainelli1-20/+1
Allows us not to duplicate more lines in arch/mips/lib/Makefile. Signed-off-by: Florian Fainelli <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/3329/ Signed-off-by: John Crispin <[email protected]>
2012-07-23MIPS: Unify memcpy.S and memcpy-inatomic.SDavid Daney3-452/+12
We can save the 451 lines of code that comprise memcpy-inatomic.S at the expense of a single instruction in the memcpy prolog. We also use an additional register (t6), so this may cause increased register pressure in some places as well. But I think the reduced maintenance burden, of not having two nearly identical implementations, makes it worth it. Signed-off-by: David Daney <[email protected]> Cc: [email protected] Signed-off-by: Ralf Baechle <[email protected]>
2012-01-31mips: use the the PCI controller's io_map_baseMichael S. Tsirkin1-2/+2
commit eab90291d35438bcebf7c3dc85be66d0f24e3002 (mips: switch to GENERIC_PCI_IOMAP) failed to take into account the PCI controller's io_map_base for mapping IO BARs. This also caused a new warning on mips. Fix this, without re-introducing code duplication, by setting NO_GENERIC_PCI_IOPORT_MAP and supplying a mips-specific __pci_ioport_map. Reported-by: Kevin Cernekee <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2012-01-14Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds1-0/+1
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (119 commits) MIPS: Delete unused function add_temporary_entry. MIPS: Set default pci cache line size. MIPS: Flush huge TLB MIPS: Octeon: Remove SYS_SUPPORTS_HIGHMEM. MIPS: Octeon: Add support for OCTEON II PCIe MIPS: Octeon: Update PCI Latency timer and enable more error reporting. MIPS: Alchemy: Update cpu-feature-overrides MIPS: Alchemy: db1200: Improve PB1200 detection. MIPS: Alchemy: merge Au1000 and Au1300-style IRQ controller code. MIPS: Alchemy: chain IRQ controllers to MIPS IRQ controller MIPS: Alchemy: irq: register pm at irq init time MIPS: Alchemy: Touchscreen support on DB1100 MIPS: Alchemy: Hook up IrDA on DB1000/DB1100 net/irda: convert au1k_ir to platform driver. MIPS: Alchemy: remove unused board headers MTD: nand: make au1550nd.c a platform_driver MIPS: Netlogic: Mark Netlogic chips as SMT capable MIPS: Netlogic: Add support for XLP 3XX cores MIPS: Netlogic: Merge some of XLR/XLP wakup code MIPS: Netlogic: Add default XLP config. ... Fix up trivial conflicts in arch/mips/kernel/{perf_event_mipsxx.c, traps.c} and drivers/tty/serial/Makefile
2011-12-07MIPS: Netlogic: Add XLP makefiles and configJayachandran C1-0/+1
- Add CPU_XLP and NLM_XLR_BOARD to arch/mips/Kconfig for Netlogic XLP boards - Update mips Makefiles to add XLP Signed-off-by: Jayachandran C <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/2968/ Signed-off-by: Ralf Baechle <[email protected]>
2011-11-28mips: switch to GENERIC_PCI_IOMAPMichael S. Tsirkin1-26/+0
mips copied pci_iomap from generic code, probably to avoid pulling the rest of iomap.c in. Since that's in a separate file now, we can reuse the common implementation. Signed-off-by: Michael S. Tsirkin <[email protected]>
2011-05-19MIPS: Kconfig and Makefile update for Netlogic XLR/XLSJayachandran C1-0/+1
Add NLM_XLR_BOARD, CPU_XLR and other config options Makefile updates, mostly based on r4k Signed-off-by: Jayachandran C <[email protected]> To: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/2334/ Signed-off-by: Ralf Baechle <[email protected]>
2011-03-31Fix common misspellingsLucas De Marchi1-1/+1
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <[email protected]>
2010-12-16MIPS: Separate two consecutive loads in memset.STony Wu1-2/+2
partial_fixup is used in noreorder block. Separating two consecutive loads can save one cycle on processors with GPR intrelock and can fix load-use on processors that need a load delay slot. Also do so for fwd_fixup. [Ralf: Only R2000/R3000 class processors are lacking the the load-user interlock and even some of those got it retrofitted. With R2000/R3000 being fairly uncommon these days the impact of this bug should be minor.] Signed-off-by: Tony Wu <[email protected]> To: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/1768/ Signed-off-by: Ralf Baechle <[email protected]>
2010-04-12MIPS: libgcc.h: Checkpatch cleanupAndrea Gelmini1-2/+1
arch/mips/lib/libgcc.h:21: ERROR: open brace '{' following union go on the same line Signed-off-by: Andrea Gelmini <[email protected]> To: [email protected] Cc: Paul Mundt <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: http://patchwork.linux-mips.org/patch/1007/ Signed-off-by: Ralf Baechle <[email protected]>
2010-04-12MIPS: delay: Fix use of current_cpu_data in preemptable code.Ralf Baechle1-2/+2
This may lead to warnings like: BUG: using smp_processor_id() in preemptible [00000000] code: reboot/1989 caller is __udelay+0x14/0x70 Call Trace: [<ffffffff8110ad28>] dump_stack+0x8/0x34 [<ffffffff812dde04>] debug_smp_processor_id+0xf4/0x110 [<ffffffff812d90bc>] __udelay+0x14/0x70 [<ffffffff81378274>] md_notify_reboot+0x12c/0x148 [<ffffffff81161054>] notifier_call_chain+0x64/0xc8 [<ffffffff811614dc>] __blocking_notifier_call_chain+0x64/0xc0 [<ffffffff8115566c>] kernel_restart_prepare+0x1c/0x38 [<ffffffff811556cc>] kernel_restart+0x14/0x50 [<ffffffff8115581c>] SyS_reboot+0x10c/0x1f0 [<ffffffff81103684>] handle_sysn32+0x44/0x84 Signed-off-by: Ralf Baechle <[email protected]>
2009-06-17MIPS: Fix __ndelay build error and add 'ull' suffix for 32-bit kernelAtsushi Nemoto1-2/+2
Signed-off-by: Atsushi Nemoto <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
2009-06-08MIPS: Outline udelay and fix a few issues.Ralf Baechle2-2/+58
Outlining fixes the issue were on certain CPUs such as the R10000 family the delay loop would need an extra cycle if it overlaps a cacheline boundary. The rewrite also fixes build errors with GCC 4.4 which was changed in way incompatible with the kernel's inline assembly. Relying on pure C for computation of the delay value removes the need for explicit. The price we pay is a slight slowdown of the computation - to be fixed on another day. Signed-off-by: Ralf Baechle <[email protected]>
2009-05-14MIPS: Cavium: Add support for 8k and 32k page sizes.Ralf Baechle1-0/+9
Beyond the requirements of the architecture standard Cavium also supports 8k and 32k pages. Signed-off-by: Ralf Baechle <[email protected]> Acked-by: David Daney <[email protected]>
2009-01-30MIPS: IP27: Switch from DMA_IP27 to DMA_COHERENTRalf Baechle2-2/+2
The special IP27 DMA code selected by DMA_IP27 has been removed a while ago turning DMA_IP27 into almost a nop. Also fixup the broken logic of its last users memcpy.S and memcpy-inatomic.s. Signed-off-by: Ralf Baechle <[email protected]>
2009-01-11MIPS: Hook up Cavium OCTEON in arch/mips.David Daney1-0/+1
Take all the OCTEON specific files that were added, and hook them into the build system for the arch/mips. For versions of GCC that lack OCTEON support, override gas target architecture. Signed-off-by: Tomaso Paoletti <[email protected]> Signed-off-by: David Daney <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
2008-10-27MIPS: Add CONFIG_CPU_R5500 for NEC VR5500 series processorsShinya Kuribayashi2-0/+2
We already have sufficient infrastructure to support VR5500 and VR5500A series processors. Here's a Makefile support to make it selectable by ports, and enable it for NEC EMMA2RH Markeins board. This patch also fixes a confused target help, and adds 1Gb PageMask bits supported by VR5500 and its variants. Signed-off-by: Shinya Kuribayashi <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
2008-10-11MIPS: IP checksums: Optimize adjust of sum on buffers of odd alignment.Ralf Baechle1-11/+24
Signed-off-by: Ralf Baechle <[email protected]>
2008-10-11MIPS: IP checksums: Remove unncessary .set pseudosRalf Baechle1-12/+0
They possibly silence meaningful warnings ... Signed-off-by: Ralf Baechle <[email protected]>
2008-10-11MIPS: IP checksums: Remove unncessary folding of sum to 16 bit.Ralf Baechle1-10/+0
Signed-off-by: Ralf Baechle <[email protected]>
2008-09-21[MIPS] Fix 64-bit IP checksum codeAtsushi Nemoto1-4/+17
Use unsigned loads to avoid possible misscalculation of IP checksums. This bug was instruced in f761106cd728bcf65b7fe161b10221ee00cf7132 (lmo) / ed99e2bc1dc5dc54eb5a019f4975562dbef20103 (kernel.org). [Original fix by Atsushi. Improved instruction scheduling and fix for unaligned unsigned load by me -- Ralf] Signed-off-by: Atsushi Nemoto <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
2008-04-29iomap: fix 64 bits resources on 32 bitsBenjamin Herrenschmidt1-2/+2
Almost all implementations of pci_iomap() in the kernel, including the generic lib/iomap.c one, copies the content of a struct resource into unsigned long's which will break on 32 bits platforms with 64 bits resources. This fixes all definitions of pci_iomap() to use resource_size_t. I also "fixed" the 64bits arch for consistency. Signed-off-by: Benjamin Herrenschmidt <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-03-12[MIPS] Fix loads of section missmatchesRalf Baechle1-1/+1
Signed-off-by: Ralf Baechle <[email protected]>
2008-03-12[MIPS] Export __ucmpdi2 to modules.Ralf Baechle1-0/+2
Signed-off-by: Ralf Baechle <[email protected]>
2008-01-29[MIPS] Eleminate local symbols from the symbol table.Ralf Baechle7-281/+282
These symbols appear in oprofile output, stacktraces and similar but only make the output harder to read. Many identical symbol names such as "both_aligned" were also being used in multiple source files making it impossible to see which file actually was meant. So let's get rid of them. Signed-off-by: Ralf Baechle <[email protected]>
2008-01-29[MIPS] IP28: added cache barrier to assembly routinesThomas Bogendoerfer3-0/+16
IP28 needs special treatment to avoid speculative accesses. gcc takes care for .c code, but for assembly code we need to do it manually. This is taken from Peter Fuersts IP28 patches. Signed-off-by: Thomas Bogendoerfer <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
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