kernel/arch/powerpc/include/asm/io.h, branch linux-4.3.y

arch/*/io.h: Add ioremap_uc() to all architectures

2015-07-29T08:02:36Z

This adds ioremap_uc() only for architectures that do not include asm-generic.h/io.h as that already provides a default definition for them for both cases where you have CONFIG_MMU and you do not, and because of this, the number of architectures this patch address is less than the architectures that the ioremap_wt() patch addressed, "arch/*/io.h: Add ioremap_wt() to all architectures"). In order to reduce the number of architectures we have to modify by adding new architecture IO APIs we'll have to review the architectures in this patch, see why they can't add asm-generic.h/io.h or issues that would be created by doing so and then spread a consistent inclusion of this header towards the end of their own header. For instance arch/metag includes the asm-generic/io.h *before* the ioremap*() definitions, this should be the other way around but only once we have guard wrappers for the non-MMU case also for asm-generic/io.h. Reported-by: Stephen Rothwell Signed-off-by: Luis R. Rodriguez Cc: Abhilash Kesavan Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Chris Metcalf Cc: David Howells Cc: Fengguang Wu Cc: Geert Uytterhoeven Cc: Greg Kroah-Hartman Cc: Greg Ungerer Cc: Guenter Roeck Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Koichi Yasutake Cc: Kyle McMartin Cc: Linus Torvalds Cc: Michael Ellerman Cc: Paul Mackerras Cc: Peter Hurley Cc: Peter Zijlstra Cc: Rob Herring Cc: Thomas Gleixner Cc: Toshi Kani Cc: Will Deacon Cc: linux-am33-list@redhat.com Cc: linux-arch@vger.kernel.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-sh@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/20150728181713.GB30479@wotan.suse.de Signed-off-by: Ingo Molnar

Merge tag 'powerpc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

2014-12-12T01:48:14Z

Pull powerpc updates from Michael Ellerman: "Some nice cleanups like removing bootmem, and removal of __get_cpu_var(). There is one patch to mm/gup.c. This is the generic GUP implementation, but is only used by us and arm(64). We have an ack from Steve Capper, and although we didn't get an ack from Andrew he told us to take the patch through the powerpc tree. There's one cxl patch. This is in drivers/misc, but Greg said he was happy for us to manage fixes for it. There is an infrastructure patch to support an IPMI driver for OPAL. There is also an RTC driver for OPAL. We weren't able to get any response from the RTC maintainer, Alessandro Zummo, so in the end we just merged the driver. The usual batch of Freescale updates from Scott" * tag 'powerpc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (101 commits) powerpc/powernv: Return to cpu offline loop when finished in KVM guest powerpc/book3s: Fix partial invalidation of TLBs in MCE code. powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault powerpc/xmon: Cleanup the breakpoint flags powerpc/xmon: Enable HW instruction breakpoint on POWER8 powerpc/mm/thp: Use tlbiel if possible powerpc/mm/thp: Remove code duplication powerpc/mm/hugetlb: Sanity check gigantic hugepage count powerpc/oprofile: Disable pagefaults during user stack read powerpc/mm: Check for matching hpte without taking hpte lock powerpc: Drop useless warning in eeh_init() powerpc/powernv: Cleanup unused MCE definitions/declarations. powerpc/eeh: Dump PHB diag-data early powerpc/eeh: Recover EEH error on ownership change for BCM5719 powerpc/eeh: Set EEH_PE_RESET on PE reset powerpc/eeh: Refactor eeh_reset_pe() powerpc: Remove more traces of bootmem powerpc/pseries: Initialise nvram_pstore_info's buf_lock cxl: Name interrupts in /proc/interrupt cxl: Return error to PSL if IRQ demultiplexing fails & print clearer warning ...

powerpc: Remove unused devm_ioremap_prot()

2014-11-09T22:59:28Z

Added in 2008, but has never had any in-tree users, and no other architectures provide it. Signed-off-by: Kyle McMartin Signed-off-by: Michael Ellerman

powerpc: io: implement dummy relaxed accessor macros for writes

2014-10-20T17:49:18Z

write{b,w,l,q}_relaxed are implemented by some architectures in order to permit memory-mapped I/O accesses with weaker barrier semantics than the non-relaxed variants. This patch adds dummy macros for the write accessors to powerpc, in the same vein as the dummy definitions for the relaxed read accessors. Cc: Benjamin Herrenschmidt Signed-off-by: Will Deacon

powerpc: Add real mode cache inhibited IO accessors

2013-12-05T05:08:21Z

These accessors allow us to do cache inhibited accesses when in real mode. They should only be used in real mode. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt

powerpc: Enable /dev/port when isa_io_special is set

2013-10-11T05:53:30Z

isa_io_special is set when the platform provides a "special" implementation of inX/outX via some FW interface for example. Such a platform doesn't need an ISA bridge on PCI, and so /dev/port should be made available even if one isn't present. This makes the LPC bus IOs accessible via /dev/port on PowerNV Power8 Signed-off-by: Benjamin Herrenschmidt

powerpc: Support endian agnostic MMIO

2013-10-11T05:48:29Z

This patch maps the MMIO functions for 32bit PowerPC to their appropriate instructions depending on CPU endianness. The macros used to create the corresponding inline functions are also renamed by this patch. Previously they had BE or LE in their names which was misleading - they had nothing to do with endianness, but actually created different instruction forms so their new names reflect the instruction form they are creating (D-Form and X-Form). Little endian 64bit PowerPC is not supported, so the lack of mappings (and corresponding breakage) for that case is intentional to bring the attention of anyone doing a 64bit little endian port. 64bit big endian is unaffected. [ Added 64 bit versions - Anton ] Signed-off-by: Ian Munsie Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Add PIO accessors for Power8 LPC bus

2013-08-14T04:58:08Z

This uses the hooks provided by CONFIG_PPC_INDIRECT_PIO to implement a set of hooks for IO port access to use the LPC bus via OPAL calls for the first 64K of IO space Signed-off-by: Benjamin Herrenschmidt

powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO

2013-08-14T04:57:50Z

Remove the generic PPC_INDIRECT_IO and ensure we only add overhead to the right accessors. IE. If only CONFIG_PPC_INDIRECT_PIO is set, we don't add overhead to all MMIO accessors. Signed-off-by: Benjamin Herrenschmidt

powerpc: remove PReP platform

2013-04-18T03:03:53Z

PPC_PREP is marked as BROKEN since v2.6.15. Remove all PReP specific code now. Signed-off-by: Paul Bolle Signed-off-by: Michael Ellerman