kernel.git/include/asm-mips/page.h, branch linux-2.6.23.y

[MIPS] Fix CONFIG_BUILD_ELF64 kernels with symbols in CKSEG0.

2007-09-27T22:19:16Z

The __pa() for those did assume that all symbols have XKPHYS values and the math fails for any other address range. Signed-off-by: Ralf Baechle

[MIPS] Fix PHYS_OFFSET for 64-bits kernels with 32-bits symbols

2007-07-10T16:32:57Z

The current implementation of __pa() for 64-bits kernels with 32-bits symbols is broken. In this configuration, we need 2 values for PAGE_OFFSET, one in XKPHYS and the other in CKSEG0 space. When the value in CKSEG0 space is used, it doesn't take into account of PHYS_OFFSET. Even worse we can't redefine this value. The patch restores CPHYSADDR() but in __pa()'s implementation because it removes the need of 2 PAGE_OFFSET. OTOH, CPHYSADDR() is quite bad when dealing with mapped kernels. So this patch assumes there's no need to deal with such kernel in 64-bits world. Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[MIPS] Move PHY_OFFSET definition in spaces.h

2007-07-10T16:32:57Z

Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[MIPS] Remove LIMITED_DMA support

2007-05-11T13:28:31Z

This code was needed only by Jaguar ATX. Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[MIPS] FLATMEM: introduce PHYS_OFFSET.

2007-02-06T16:53:13Z

The old code was assuming that min_low_pfn was always 0. This means that platforms having a big hole at their memory start paid the price of wasting some memory for the allocation of unused entries in mem_map[]. This patch prevents this waste. It introduces PHYS_OFFSET define which is the start of the physical memory and uses it wherever needed. Specially when converting physical/virtual addresses into virtual/physical ones. Currently all platforms defines PHYS_OFFSET to 0. Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[PATCH] MIPS: Fix COW D-cache aliasing on fork

2006-12-13T17:27:08Z

Provide a custom copy_user_highpage() to deal with aliasing issues on MIPS. It uses kmap_coherent() to map an user page for kernel with same color. Rewrite copy_to_user_page() and copy_from_user_page() with the new interfaces to avoid extra cache flushing. The main part of this patch was originally written by Ralf Baechle; Atushi Nemoto did the the debugging. Signed-off-by: Atsushi Nemoto Signed-off-by: Ralf Baechle Signed-off-by: Linus Torvalds

[MIPS] Introduce __pa_symbol()

2006-11-30T01:14:41Z

This patch introduces __pa_symbol() macro which should be used to calculate the physical address of kernel symbols. It also relies on RELOC_HIDE() to avoid any compiler's oddities when doing arithmetics on symbols. Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[MIPS] Make __pa() aware of XKPHYS/CKSEG0 address mix for 64 bit kernels

2006-11-30T01:14:41Z

During early boot mem init, some configs couldn't use __pa() to convert virtual into physical addresses. Specially for 64 bit kernel cases when CONFIG_BUILD_ELF64=n. This patch make __pa() work for _all_ configs and thus make CPHYSADDR() useless. Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[MIPS] page.h: remove __pa() usages.

2006-11-30T01:14:40Z

__pa() was used by virt_to_page() and virt_addr_valid(). These latter are used when kernel is initialised so __pa() is not appropriate, we use virt_to_phys() instead. Futhermore __pa() is going to take care of CKSEG0/XKPHYS address mix for 64 bit kernels. This makes __pa() more complex than virt_to_phys() and this extra work is not needed by virt_to_page() and virt_addr_valid(). Eventually it consolidates virt_to_phys() prototype by making its argument 'const'. this avoids some warnings that was due to some virt_to_page() usages which pass const pointer. Signed-off-by: Franck Bui-Huu Signed-off-by: Ralf Baechle

[MIPS] Do not lose upper 32-bit on MIPS32 with 64-bit addresses in __pte().

2006-09-27T12:37:39Z

Signed-off-by: Ralf Baechle