Linux kernel documentation tree maintained by Jonathan Corbet http://mirrors.hust.edu.cn/git/lwn.git/atom?h=docs-fixes 2012-11-16T19:22:18+00:00 2012-11-16T19:22:18+00:00 Stephen Warren swarren@nvidia.com 2012-09-25T21:54:56+00:00 urn:sha1:460678035247a9f72a4401dfeb6513ee495bf975 Move Tegra's debug-macro.S over to the common debug macro directory. Move Tegra's debug UART selection menu into ARM's Kconfig.debug, so that all related options are selected in the same place. Tegra's uncompress.h is left in mach-tegra/include/mach; it will be removed whenever Tegra is converted to multi-platform. Signed-off-by: Stephen Warren <swarren@nvidia.com> 2012-11-16T19:22:17+00:00 Stephen Warren swarren@nvidia.com 2012-10-19T18:27:58+00:00 urn:sha1:7a28106509463529d7b0408d3f5a0ab99f6810ee In order to move Tegra's debug-macro.S to a common location for single zImage, it must not rely on any machine-specific header files such as <mach/iomap.h>. Duplicate the few physical address definitions that debug-macro.S relies upon directly into the file. To avoid tegra_io_desc[] requiring shared knowledge of the UART mapping's virtual address, use a virtual address outside the ranges in tegra_io_desc[]. Call debug_ll_io_init() to propagate the mapping beyond the early pages tables. Signed-off-by: Stephen Warren <swarren@nvidia.com> 2012-11-16T19:22:17+00:00 Stephen Warren swarren@nvidia.com 2012-10-01T21:33:20+00:00 urn:sha1:1a6d3da8bc45502940efb19604d4c94c470ef6be Prior to this change, Tegra's debug-macro.S relied on uncompress.h having determined which UART to use, and whether it was safe to use the UART (i.e. is it not in reset, and is clocked). This determination was communicated from uncompress.h to debug-macro.S using a few bytes of Tegra's IRAM (an on-SoC RAM). This had the disadvantage that uncompress.h was a required part of the kernel boot process; booting a non-compressed kernel would not allow earlyprintk to operate. This change duplicates the UART selection and validation logic into debug-macro.S so that the reliance on uncompress.h is removed. This also helps out with single-zImage work, since there is currently no support for using any uncompress.h with single-zImage. Signed-off-by: Stephen Warren <swarren@nvidia.com> 2012-11-05T18:36:06+00:00 Stephen Warren swarren@nvidia.com 2012-10-04T20:16:59+00:00 urn:sha1:bb1de8877c960b3b3e1c8337730df970b262fd44 Nothing outside mach-tegra uses this file, so there's no need for it to be in <mach/>. Since uncompress.h and debug-macro.S remain in include/mach, they need to include "../../irammap.h" becaue of this change. Both these usages will be removed shortly, when Tegra's DEBUG_LL implementation is updated not to pass information through IRAM. Signed-off-by: Stephen Warren <swarren@nvidia.com> 2012-11-05T18:36:06+00:00 Stephen Warren swarren@nvidia.com 2012-10-04T20:24:09+00:00 urn:sha1:2be39c079d692a07b55c8795051d40c0c94a3633 Nothing outside mach-tegra uses this file, so there's no need for it to be in <mach/>. Since uncompress.h and debug-macro.S remain in include/mach, they need to include "../../iomap.h" becaue of this change. uncompress.h will soon be deleted in later multi-platform/single-zImage patches. debug-macro.S will need to continue to include this header using an explicit relative path, to avoid duplicating the physical->virtual address mapping that iomap.h dictates. Signed-off-by: Stephen Warren <swarren@nvidia.com> 2012-03-30T01:02:10+00:00 Linus Torvalds torvalds@linux-foundation.org 2012-03-30T01:02:10+00:00 urn:sha1:820d41cf0cd0e94a5661e093821e2e5c6b36a9d8 Pull "ARM: cleanups of io includes" from Olof Johansson: "Rob Herring has done a sweeping change cleaning up all of the mach/io.h includes, moving some of the oft-repeated macros to a common location and removing a bunch of boiler plate. This is another step closer to a common zImage for multiple platforms." Fix up various fairly trivial conflicts (<mach/io.h> removal vs changes around it, tegra localtimer.o is *still* gone, yadda-yadda). * tag 'cleanup2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (29 commits) ARM: tegra: Include assembler.h in sleep.S to fix build break ARM: pxa: use common IOMEM definition ARM: dma-mapping: convert ARCH_HAS_DMA_SET_COHERENT_MASK to kconfig symbol ARM: __io abuse cleanup ARM: create a common IOMEM definition ARM: iop13xx: fix missing declaration of iop13xx_init_early ARM: fix ioremap/iounmap for !CONFIG_MMU ARM: kill off __mem_pci ARM: remove bunch of now unused mach/io.h files ARM: make mach/io.h include optional ARM: clps711x: remove unneeded include of mach/io.h ARM: dove: add explicit include of dove.h to addr-map.c ARM: at91: add explicit include of hardware.h to uncompressor ARM: ep93xx: clean-up mach/io.h ARM: tegra: clean-up mach/io.h ARM: orion5x: clean-up mach/io.h ARM: davinci: remove unneeded mach/io.h include [media] davinci: remove includes of mach/io.h ARM: OMAP: Remove remaining includes for mach/io.h ARM: msm: clean-up mach/io.h ... 2012-03-07T03:34:41+00:00 Rob Herring rob.herring@calxeda.com 2012-02-11T03:22:00+00:00 urn:sha1:6c38e25b6b9c64c8b2fc02c70095e70d97a3ace6 Move tegra specific mach/io.h parts into iomap.h. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Tested-by: Stephen Warren <swarren@nvidia.com> Acked-by: Stephen Warren <swarren@nvidia.com> Cc: Colin Cross <ccross@android.com> Cc: Olof Johansson <olof@lixom.net> 2012-02-07T02:25:00+00:00 Stephen Warren swarren@nvidia.com 2012-01-06T10:43:22+00:00 urn:sha1:6d7d7b3ecd20a0fbcebdbdffe7b25d94cfa37d93 uncompress.h now saves the selected UART's physical address in Tegra's IRAM, along with a cookie to indicate validity. The first time it's run, macro addruart in debug-macro.S looks for this cookie, and if it's present, uses the UART address stored there. If not, the static value TEGRA_DEBUG_UART_BASE is used, as was previous behaviour. The static behaviour will thus be used when not booting using a zImage. This work was inspired by work by Doug Anderson <dianders@chromium.org>; see http://lkml.org/lkml/2011/9/26/284. However, this patch relies on the data passing describe above, rather than duplicating the UART selection logic in debug-macro.S; the latest selection logic is more complex due to the need to check reset/clock bits too. Signed-off-by: Stephen Warren <swarren@nvidia.com> Tested-by: Doug Anderson <dianders@chromium.org> Acked-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Olof Johansson <olof@lixom.net> 2011-09-26T14:11:25+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2011-09-01T02:55:46+00:00 urn:sha1:639da5ee374ba8f070690bbd355ca30139ce145a Some platforms (like OMAP not to name it) are doing rather complicated hacks just to determine the base UART address to use. Let's give their addruart macro some slack by providing an extra work register which will allow for much needed cleanups. This is basically a no-op as this commit is only adding the extra argument to the macro but no one is using it yet. Signed-off-by: nicolas Pitre <nicolas.pitre@linaro.org> Reviewed-by: Kevin Hilman <khilman@ti.com> 2011-02-10T05:56:59+00:00 Colin Cross ccross@android.com 2010-08-06T21:29:14+00:00 urn:sha1:d377eb0d95e4a7333afeb5ca4ba8554160480263 Signed-off-by: Colin Cross <ccross@android.com>