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path: root/arch/arm/mm/copypage-v4mc.c
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2009-10-05ARM: Pass VMA to copy_user_highpage() implementationsRussell King
Our copy_user_highpage() implementations may require cache maintainence. Ensure that implementations have all necessary details to perform this maintainence. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-03-12[ARM] 5421/1: ftrace: fix crash due to tracing of __naked functionsUwe Kleine-König
This is a fix for the following crash observed in 2.6.29-rc3: http://lkml.org/lkml/2009/1/29/150 On ARM it doesn't make sense to trace a naked function because then mcount is called without stack and frame pointer being set up and there is no chance to restore the lr register to the value before mcount was called. Reported-by: Matthias Kaehlcke <matthias@kaehlcke.net> Tested-by: Matthias Kaehlcke <matthias@kaehlcke.net> Cc: Abhishek Sagar <sagar.abhishek@gmail.com> Cc: Steven Rostedt <rostedt@home.goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-24[ARM] fix StrongARM-11x0 page copy implementationRussell King
Which had the 'from' and 'to' pages reversed. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-28[ARM] fix a couple clear_user_highpage assembly constraintsNicolas Pitre
In all cases the kaddr is assigned an input register even though it is modified in the assembly code. Let's assign a new variable to the modified value and mark those inline asm with volatile otherwise they get optimized away because the output variable is otherwise not used. Also fix a few conversion errors in copypage-feroceon.c and copypage-v4mc.c. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27[ARM] clearpage: provide our own clear_user_highpage()Russell King
For similar reasons as copy_user_page(), we want to avoid the additional kmap_atomic if it's unnecessary. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27[ARM] copypage: provide our own copy_user_highpage()Russell King
We used to override the copy_user_page() function. However, this is not only inefficient, it also causes additional complexity for highmem support, since we convert from a struct page to a kernel direct mapped address and back to a struct page again. Moreover, with highmem support, we end up pointlessly setting up kmap entries for pages which we're going to remap. So, push the kmapping down into the copypage implementation files where it's required. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-10-01[ARM] Introduce new PTE memory type bitsRussell King
Provide L_PTE_MT_xxx definitions to describe the memory types that we use in Linux/ARM. These definitions are carefully picked such that: 1. their LSBs match what is required for pre-ARMv6 CPUs. 2. they all have a unique encoding, including after modification by build_mem_type_table() (the result being that some have more than one combination.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-30[ARM] 4078/1: Fix ARM copypage cache coherency problemsRichard Purdie
If PG_dcache_dirty is set for a page, we need to flush the source page before performing any copypage operation using a different virtual address. This fixes the copypage implementations for XScale, StrongARM and ARMv6. This patch fixes segmentation faults seen in the dynamic linker under the usage patterns in glibc 2.4/2.5. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-13[ARM] Unuse another Linux PTE bitRussell King
L_PTE_ASID is not really required to be stored in every PTE, since we can identify it via the address passed to set_pte_at(). So, create set_pte_ext() which takes the address of the PTE to set, the Linux PTE value, and the additional CPU PTE bits which aren't encoded in the Linux PTE value. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-09-20[ARM] Cleanup arch/arm/mm a littleRussell King
Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm references it. Move the repeated definition of TOP_PTE into mm/mm.h, as well as a few function prototypes. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-16[PATCH] ARM: Fix build errorRussell King
Mainline kernels don't have VECTORS_HIGH nor COPYPAGE_MINICACHE yet. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-10[PATCH] ARM: Move copy/clear user_page locking into implementationRussell King
Move the locking for copy_user_page() and clear_user_page() into the implementations which require locking. For simple memcpy/ memset based implementations, the locking is extra overhead which is not necessary, and prevents preemption occuring. Signed-off-by: Russell King <rmk@arm.linux.org.uk>