kernel/linux.git/arch/alpha/include/asm/io.h, branch v6.19.11

alpha: stop using asm-generic/iomap.h

2025-03-10T15:20:25+00:00

Alpha has custom definitions for ioread64()/iowrite64(), which now don't exist in the lib/iomap.c variant. This is an endless source of build failures, since alpha tries to share a couple of function declarations. Change alpha to have its own prototypes that match the definitions in arch/alpha/kerne/io.c instead. Signed-off-by: Arnd Bergmann

asm-generic: provide generic page_to_phys and phys_to_page implementations

2024-10-28T21:44:28+00:00

page_to_phys is duplicated by all architectures, and from some strange reason placed in where it doesn't fit at all. phys_to_page is only provided by a few architectures despite having a lot of open coded users. Provide generic versions in to make these helpers more easily usable. Note with this patch powerpc loses the CONFIG_DEBUG_VIRTUAL pfn_valid check. It will be added back in a generic version later. Signed-off-by: Christoph Hellwig Signed-off-by: Arnd Bergmann

alpha: fix ioread64be()/iowrite64be() helpers

2024-08-01T13:48:03+00:00

Compile-testing the crypto/caam driver on alpha showed a pre-existing problem on alpha with iowrite64be() missing: ERROR: modpost: "iowrite64be" [drivers/crypto/caam/caam_jr.ko] undefined! The prototypes were added a while ago when we started using asm-generic/io.h, but the implementation was still missing. At some point the ioread64/iowrite64 helpers were added, but the big-endian versions are still missing, and the generic version (using readq/writeq) is would not work here. Change it to wrap ioread64()/iowrite64() instead. Fixes: beba3771d9e0 ("crypto: caam: Make CRYPTO_DEV_FSL_CAAM dependent of COMPILE_TEST") Fixes: e19d4ebc536d ("alpha: add full ioread64/iowrite64 implementation") Fixes: 7e772dad9913 ("alpha: Use generic ") Closes: https://lore.kernel.org/all/CAHk-=wgEyzSxTs467NDOVfBSzWvUS6ztcwhiy=M3xog==KBmTw@mail.gmail.com/ Tested-by: Guenter Roeck Reviewed-by: Linus Walleij Signed-off-by: Arnd Bergmann

alpha: remove LCA and APECS based machines

2024-05-03T20:09:59+00:00

APECS is the DECchip 21071x chipset for the EV4 and EV45 generation, while LCA is the integrated I/O support on the corresponding low-cost alpha machines of that generation. All of these CPUs lack the BWX extension for byte and word access, so drop the chipset support and all associated machines. Acked-by: Paul E. McKenney Acked-by: Matt Turner Signed-off-by: Arnd Bergmann

alpha: remove DECpc AXP150 (Jensen) support

2024-05-03T20:09:50+00:00

This is one of the hackiest Alpha machines, and the only one without PCI support. Removing this allows cleaning up code in eise and tty drivers in addition to the architecture code. Acked-by: Paul E. McKenney Acked-by: Matt Turner Signed-off-by: Arnd Bergmann

asm/io: remove unnecessary xlate_dev_mem_ptr() and unxlate_dev_mem_ptr()

2023-11-23T09:37:40+00:00

The asm-generic/io.h already has default definition, remove unnecessary arch's defination. Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Russell King Cc: Brian Cain Cc: "James E.J. Bottomley" Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Yoshinori Sato Cc: Rich Felker Cc: "David S. Miller" Cc: Stanislav Kinsburskii Signed-off-by: Kefeng Wang Signed-off-by: Arnd Bergmann

arch/*/io.h: remove ioremap_uc in some architectures

2023-11-23T09:32:52+00:00

ioremap_uc() is only meaningful on old x86-32 systems with the PAT extension, and on ia64 with its slightly unconventional ioremap() behavior. So remove the ioremap_uc() definition in architecutures other than x86 and ia64. These architectures all have asm-generic/io.h included and will have the default ioremap_uc() definition which returns NULL. This changes the existing behaviour, while no need to worry about any breakage because in the only callsite of ioremap_uc(), code has been adjusted to eliminate the impact. Please see atyfb_setup_generic() of drivers/video/fbdev/aty/atyfb_base.c. If any new invocation of ioremap_uc() need be added, please consider using ioremap() intead or adding a ARCH specific version if necessary. Signed-off-by: Baoquan He Acked-by: Geert Uytterhoeven Acked-by: Michael Ellerman (powerpc) Acked-by: Helge Deller # parisc Acked-by: Arnd Bergmann Acked-by: Thomas Bogendoerfer Acked-by: John Paul Adrian Glaubitz (SuperH) Cc: linux-alpha@vger.kernel.org Cc: linux-hexagon@vger.kernel.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Signed-off-by: Arnd Bergmann

alpha: remove unused __SLOW_DOWN_IO and SLOW_DOWN_IO definitions

2023-02-14T17:37:18+00:00

Remove unused __SLOW_DOWN_IO and SLOW_DOWN_IO definitions. Signed-off-by: Bjorn Helgaas Signed-off-by: Matt Turner

alpha: add full ioread64/iowrite64 implementation

2022-10-04T09:23:29+00:00

The previous patch introduced ioread64/iowrite64 declarations, but this means we no longer get the io-64-nonatomic variant, and run into a long error when someone actually wants to use these: ERROR: modpost: "ioread64" [drivers/net/ethernet/freescale/enetc/fsl-enetc.ko] undefined! Add the (hopefully) correct implementation for each machine type, based on the 32-bit accessor. Since the 32-bit return type does not work for ioread64(), change the internal implementation to use the correct width consistently, but leave the external interface to match the asm-generic/iomap.h header that uses 32-bit or 64-bit return values. Reported-by: Guenter Roeck Tested-by: Guenter Roeck Reviewed-by: Linus Walleij Fixes: 7e772dad9913 ("alpha: Use generic ") Signed-off-by: Arnd Bergmann

alpha: Use generic

2022-09-08T14:47:12+00:00

This enables the alpha to use to fill in the missing (undefined) I/O accessor functions. This is needed if Alpha ever wants to uses CONFIG_REGMAP_MMIO which has been patches to use accelerated _noinc accessors such as readsq/writesq that Alpha, while being a 64bit platform, as of now not yet provide. readq/writeq is however provided so the machine can do 64bit I/O. This comes with the requirement that everything the architecture already provides needs to be defined, rather than just being, say, static inline functions. Bite the bullet and just provide the definitions and make it work. Some defines need to be piled right before the inclusion of due to the fact that alpha is including without selecting GENERIC_IOMAP. Reported-by: kernel test robot Signed-off-by: Linus Walleij Cc: Mark Brown Cc: Arnd Bergmann Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: linux-arch@vger.kernel.org Cc: linux-alpha@vger.kernel.org Link: https://lore.kernel.org/linux-mm/202208181447.G9FLcMkI-lkp@intel.com/ Signed-off-by: Arnd Bergmann