linux-toradex.git/arch/arm/include/asm/pgtable.h, branch v3.0.7 Linux kernel for Apalis and Colibri modules ARM: pgtable: add pud-level code 2011-02-21T19:24:14+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-21T16:27:49+00:00 516295e5ab4bf986865cfff856d484ec678e3b0b Add pud_offset() et.al. between the pgd and pmd code in preparation of using pgtable-nopud.h rather than 4level-fixup.h. This incorporates a fix from Jamie Iles <jamie@jamieiles.com> for uaccess_with_memcpy.c. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add pud_offset() et.al. between the pgd and pmd code in preparation of
using pgtable-nopud.h rather than 4level-fixup.h.

This incorporates a fix from Jamie Iles <jamie@jamieiles.com> for
uaccess_with_memcpy.c.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6672/1: LPAE: use phys_addr_t instead of unsigned long in mapping functions 2011-02-15T14:20:23+00:00 Will Deacon will.deacon@arm.com 2011-02-15T11:42:57+00:00 cae6292b653f5e3308bf2787a54b7dcd2cc7e2b3 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 physical addresses when converting from a PFN. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
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 physical
addresses when converting from a PFN.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: provide RDONLY page table bit rather than WRITE bit 2010-12-22T11:05:35+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-16T08:40:36+00:00 36bb94ba36f332de767cfaa3af6a5136435a3a9c Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: invert L_PTE_EXEC to L_PTE_XN 2010-12-22T11:05:35+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-16T00:23:31+00:00 9522d7e4cb5e0858122fc55d33a2c07728f0b10d The hardware page tables use an XN bit 'execute never'. Historically, we've had a Linux 'execute allow' bit, in the positive sense. Get rid of this artifact as future hardware will continue to have the XN sense. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The hardware page tables use an XN bit 'execute never'.  Historically,
we've had a Linux 'execute allow' bit, in the positive sense.  Get rid
of this artifact as future hardware will continue to have the XN sense.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: remove FIRST_USER_PGD_NR 2010-12-22T11:05:34+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-21T11:55:37+00:00 e926f4495e202500a6265987277fab217e235f08 FIRST_USER_PGD_NR is now unnecessary, as this has been replaced by FIRST_USER_ADDRESS except in the architecture code. Fix up the last usage of FIRST_USER_PGD_NR, and remove the definition. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
FIRST_USER_PGD_NR is now unnecessary, as this has been replaced by
FIRST_USER_ADDRESS except in the architecture code.  Fix up the last
usage of FIRST_USER_PGD_NR, and remove the definition.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: collect up identity mapping functions 2010-12-22T11:05:33+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-21T11:41:57+00:00 614dd0585f376a25c638abbed9c5fbd21d7baece We have two places where we create identity mappings - one when we bring secondary CPUs online, and one where we setup some mappings for soft- reboot. Combine these two into a single implementation. Also collect the identity mapping deletion function. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
We have two places where we create identity mappings - one when we bring
secondary CPUs online, and one where we setup some mappings for soft-
reboot.  Combine these two into a single implementation.  Also collect
the identity mapping deletion function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: switch order of Linux vs hardware page tables 2010-12-22T11:05:32+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-16T00:16:01+00:00 d30e45eeabefadc6039d7f876a59e5f5f6cb11c6 This switches the ordering of the Linux vs hardware page tables in each page, thereby eliminating some of the arithmetic in the page table walks. As we now place the Linux page table at the beginning of the page, we can deal with the offset in the pgt by simply masking it away, along with the other control bits. This also makes the arithmetic all be positive, rather than a mixture. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This switches the ordering of the Linux vs hardware page tables in
each page, thereby eliminating some of the arithmetic in the page
table walks.  As we now place the Linux page table at the beginning
of the page, we can deal with the offset in the pgt by simply masking
it away, along with the other control bits.

This also makes the arithmetic all be positive, rather than a mixture.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: introduce pteval_t to represent a pte value 2010-11-26T20:45:47+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-16T00:22:09+00:00 f6e3354d02aa1f30672e3671098c12cb49c7da25 This makes everywhere dealing with pte values use the same type. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This makes everywhere dealing with pte values use the same type.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: use phys_addr_t for physical addresses 2010-11-26T20:45:46+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-16T00:16:01+00:00 97092e0c56830457af0639f6bd904537a150ea4a Ensure that physical addresses are typed as phys_addr_t Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Ensure that physical addresses are typed as phys_addr_t

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: pgtable: directly pass pgd/pmd/pte to their error functions 2010-11-26T20:45:45+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-16T00:19:55+00:00 69529c0eb76469168f1dd5851f363dbab17ce8fd Rather than passing the pte value to __pte_error, pass the raw pte_t cookie instead. Do the same for pmd and pgd functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Rather than passing the pte value to __pte_error, pass the raw pte_t
cookie instead.  Do the same for pmd and pgd functions.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>