aboutsummaryrefslogtreecommitdiffstats
path: root/arch
Commit message (Collapse)AuthorAge
* m68k: Define sigcontext ABI of ColdFireMaxim Kuvyrkov2010-02-27
| | | | | | | | | | | | | | | | | The following patch defines sigcontext ABI of ColdFire. Due to ISA restrictions ColdFire needs different rt_sigreturn trampoline. And due to ColdFire FP registers being 8-bytes instead of 12-bytes on m68k, sigcontext and fpregset structures should be updated. Regarding the sc_fpstate[16+6*8] field, it would've been enough 16 bytes to store ColdFire's FP state. To accomodate GLIBC's libSegFault it would'be been enough 6*8 bytes (room for the 6 non-call-clobbered FP registers). I set it to 16+6*8 to provide some extra space for any future changes in the ColdFire FPU. Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68knommu: NPTL support for uClinuxMaxim Kuvyrkov2010-02-27
| | | | | | | | Port syscalls for NPTL support to m68knommu. Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k: Add NPTL supportMaxim Kuvyrkov2010-02-27
| | | | | | | | | | | | | | | This patch adds several syscalls, that provide necessary functionality to support NPTL on m68k/ColdFire. The syscalls are get_thread_area, set_thread_area, atomic_cmpxchg_32 and atomic_barrier. The cmpxchg syscall is required for ColdFire as it doesn't support 'cas' instruction. Also a ptrace call PTRACE_GET_THREAD_AREA is added to allow debugger to inspect the TLS storage. Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k: Eliminate unused variable in page_to_phys()Geert Uytterhoeven2010-02-27
| | | | | | | "pgdat" is unused, so we can eliminate it and turn page_to_phys() into a single-line macro. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k: Switch to generic siginfo layoutMaxim Kuvyrkov2010-02-27
| | | | | | | | | | This patch switches m68k to generic siginfo layout. The custom layout of m68k's `struct siginfo' had several issues due to not considering aliasing of members in the union, e.g., _uid32 was at different offsets in ._kill, ._rt and ._sigchld. Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* mac68k: start CUDA earlyFinn Thain2010-02-27
| | | | | | | | | The valkyriefb driver needs the CUDA to work in order to set the video mode at boot. So initialise the device earlier, and bring the m68k code closer to the powermac code. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* mac68k: move macsonic and macmace platform devicesFinn Thain2010-02-27
| | | | | | | Move platform device code from the drivers to the platform init function. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* mac68k: move mac_esp platform deviceFinn Thain2010-02-27
| | | | | | | Move platform device code from the driver to the platform init function. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* mac68k: replace mac68k SCC code with platform deviceFinn Thain2010-02-27
| | | | | | | | Remove the old 68k Mac serial port code and a lot of related cruft. Add new SCC platform devices to mac 68k platform. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* pmac-zilog: add platform driverFinn Thain2010-02-27
| | | | | | | | | Add platform driver support to the pmac-zilog driver, for m68k macs. Place the powermac-specific code inside #ifdef CONFIG_PPC_PMAC. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* mac68k: rework SWIM platform deviceFinn Thain2010-02-27
| | | | | | | | | Adjust the platform device code to conform with the code style used in the rest of this patch series. No need to name resources nor to register devices which are not applicable. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* mac68k: cleanupFinn Thain2010-02-27
| | | | | | | Cleanup whitespace and comments. Remove some dead code. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k: Use DIV_ROUND_CLOSESTJulia Lawall2010-02-27
| | | | | | | | | | | | | | | | | | | | | | | The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d but is perhaps more readable. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ @depends on haskernel@ expression x,__divisor; @@ - (((x) + ((__divisor) / 2)) / (__divisor)) + DIV_ROUND_CLOSEST(x,__divisor) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k{,nommu}/h8300: Remove obsolete comment about map_chunkPhilippe De Muyter2010-02-27
| | | | | | | Remove the comments referring to a function map_chunk that no longer exists. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k: Allow ioremapping top of memoryPhilippe De Muyter2010-02-27
| | | | | | | | The test in __ioremap to reject memory ranges crossing the 0 boundary rejects also memory ranges ending at the end of the memory. Fix that. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* m68k: Fix asm/swab.h for ColdFireMaxim Kuvyrkov2010-02-27
| | | | | | | | Make asm/swab.h compatible with ColdFire ISA_B CPUs. Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* Merge branch 'v4l_for_linus' of ↵Linus Torvalds2010-02-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (362 commits) V4L-DVB: cx88-dvb: remove extra attribution for core V4L/DVB: v4l: soc_camera: fix bound checking of mbus_fmt[] index V4L/DVB: Add support for SMT7020 to cx88 V4L/DVB: radio-si470x: Use UTF-8 encoding on a comment V4L/DVB: MAINTAINERS: Telegent tlg2300 section fix V4L/DVB: gspca_stv06xx: Add support for camera button V4L/DVB: gspca_ov519: add support for the button on ov511 based cams V4L/DVB: gspca_ov519: Add support for the button on ov518 based cams V4L/DVB: gspca_ov519: add support for the button on ov519 based cams V4L/DVB: gspca_main: Fix a compile error when CONFIG_INPUT is not set V4L/DVB: gspca_main: some input error handling fixes V4L/DVB: gspca_main: Allow use of input device creation code for non int. inputs V4L/DVB: gspca_pac7302: much improved exposure control V4L/DVB: gspca_sonixb: Make sonixb driver handle pas106 and pas202 cameras V4L/DVB: gspca_sonixb: pas106: fixup bright ctrl and add gain and exposure ctrls V4L/DVB: Documentation: gspca.txt: update known mr97310a cams V4L/DVB: gspca_mr97310a: add support for the Sakar 1638x CyberPix V4L/DVB: gscpa_sonixb: limit ov7630 max framerate at 640x480 V4L/DVB: gspca_sonixb: pas202: fixup brightness ctrl and add gain and exposure ctrls V4L/DVB: gscpa_sonixb: Differentiate between sensors with a coarse and fine expo ctrl ...
| * V4L/DVB: DaVinci - Adding platform & board changes for vpfe capture on DM365Murali Karicheri2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds following changes:- 1) add sub device configuration data for TVP5146 used by vpfe capture 2) registers platform devices for vpfe_capture, isif and vpss 3) defines hardware resources for the devices listed under 2) 4) defines clock aliase for isif driver 5) adding setup_pinmux() for isif Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Murali Karicheri <mkaricheri@gmail.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * pxa_camera: remove init() callbackAntonio Ospite2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pxa_camera init() callback is sometimes abused to setup MFP for PXA CIF, or even to request GPIOs to be used by the camera *sensor*. These initializations can be performed statically in machine init functions. The current semantics for this init() callback is ambiguous anyways, it is invoked in pxa_camera_activate(), hence at device node open, but its users use it like a generic initialization to be done at module init time (configure MFP, request GPIOs for *sensor* control). Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * soc-camera: ov772x: Modify buswidth controlKuninori Morimoto2010-02-26
| | | | | | | | | | | | | | | | | | | | This patch removes "buswidth" struct member, and sets the default buswidth to the natively supported 10 bit. You can select 8 bit buswidth by new flag. This patch also modify ap325rxa/migor setup.c Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB: vpfe-capture: converting ccdc drivers to platform-driversMuralidharan Karicheri2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds platform code for ccdc driver on DM355 and DM6446. 1) new ccdc platform devices added 2) added clock aliases master and slave for CCDC clocks 3) added dm355_ccdc_setup_pinmux() pin-mux setup hook in dm355 ccdc driver platform data Reviewed-by: Vaibhav Hiremath <hvaibhav@ti.com> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* | Merge branch 'kmemcheck-for-linus' of ↵Linus Torvalds2010-02-26
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 * 'kmemcheck-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: kmemcheck: Test the full object in kmemcheck_is_obj_initialized()
| * \ Merge branch 'kmemcheck/fixes' into kmemcheck-for-linusPekka Enberg2010-02-26
| |\ \ | | |/ | |/|
| | * kmemcheck: Test the full object in kmemcheck_is_obj_initialized()Catalin Marinas2010-02-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a fix for bug #14845 (bugzilla.kernel.org). The update_checksum() function in mm/kmemleak.c calls kmemcheck_is_obj_initialised() before scanning an object. When KMEMCHECK_PARTIAL_OK is enabled, this function returns true. However, the crc32_le() reads smaller intervals (32-bit) for which kmemleak_is_obj_initialised() may be false leading to a kmemcheck warning. Note that kmemcheck_is_obj_initialized() is currently only used by kmemleak before scanning a memory location. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christian Casteyde <casteyde.christian@free.fr> Cc: Vegard Nossum <vegardno@ifi.uio.no> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/xfs-viptLinus Torvalds2010-02-26
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/xfs-vipt: xfs: fix xfs to work with Virtually Indexed architectures sh: add mm API for DMA to vmalloc/vmap areas arm: add mm API for DMA to vmalloc/vmap areas parisc: add mm API for DMA to vmalloc/vmap areas mm: add coherence API for DMA to vmalloc/vmap areas
| * | | sh: add mm API for DMA to vmalloc/vmap areasJames Bottomley2010-02-05
| | | | | | | | | | | | | | | | Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| * | | arm: add mm API for DMA to vmalloc/vmap areasJames Bottomley2010-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | ARM cannot prevent cache movein, so this patch implements both the flush and invalidate pieces of the API. Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| * | | parisc: add mm API for DMA to vmalloc/vmap areasJames Bottomley2010-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We already have an API to flush a kernel page along an alias address, so use it. The TLB purge prevents the CPU from doing speculative moveins on the flushed address, so we don't need to implement and invalidate. Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds2010-02-26
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (187 commits) sh: remove dead LED code for migo-r and ms7724se sh: ecovec build fix for CONFIG_I2C=n sh: ecovec r-standby support sh: ms7724se r-standby support sh: SH-Mobile R-standby register save/restore clocksource: Fix up a registration/IRQ race in the sh drivers. sh: ms7724: modify scan_timing for KEYSC sh: ms7724: Add sh_sir support sh: mach-ecovec24: Add sh_sir support sh: wire up SET/GET_UNALIGN_CTL. sh: allow alignment fault mode to be configured at kernel boot. sh: sh7724: Update FSI/SPU2 clock sh: always enable sh7724 vpu_clk and set to 166MHz on Ecovec sh: add sh7724 kick callback to clk_div4_table sh: introduce struct clk_div4_table sh: clock-cpg div4 set_rate() shift fix sh: Turn on speculative return for SH7785 and SH7786 sh: Merge legacy and dynamic PMB modes. sh: Use uncached I/O helpers in PMB setup. sh: Provide uncached I/O helpers. ...
| * | | | sh: remove dead LED code for migo-r and ms7724seMagnus Damm2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_PM is always set on SH-Mobile these days so get rid of the unused LED setup code. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: ecovec build fix for CONFIG_I2C=nMagnus Damm2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow building the ecovec board support code even though I2C support is disabled. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: ecovec r-standby supportMagnus Damm2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds board specific r-standby resume code for ecovec. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: ms7724se r-standby supportMagnus Damm2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds board specific r-standby resume code for ms7724se. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: SH-Mobile R-standby register save/restoreMagnus Damm2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add code to save/restore registers during R-standby sleep on SH-Mobile processors. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: ms7724: modify scan_timing for KEYSCKuninori Morimoto2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | KEYSC::SCN register of SH7724 is 3bit. Thus, scan_timing should be 0 - 7 here. Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: ms7724: Add sh_sir supportKuninori Morimoto2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: mach-ecovec24: Add sh_sir supportKuninori Morimoto2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: wire up SET/GET_UNALIGN_CTL.Paul Mundt2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This hooks up the SET/GET_UNALIGN_CTL knobs cribbing the bulk of it from the PPC and ia64 implementations. The thread flags happen to be the logical inverse of what the global fault mode is set to, so this works out pretty cleanly. By default the global fault mode is used, with tasks now being able to override their own settings via prctl(). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: allow alignment fault mode to be configured at kernel boot.Paul Mundt2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Follow the ARM change, which is what our alignment helpers are based on in the first place. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: sh7724: Update FSI/SPU2 clockKuninori Morimoto2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When FSI and Network (= NFS file system) were used at the same time, the I/O of FSI was unstable. This patch updates the SPU2 clock (which is used for FSI) to solve this issue. Special thanks to Jeremy. Signed-off-by: Jeremy Baker <Jeremy.Baker@renesas.com> Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: always enable sh7724 vpu_clk and set to 166MHz on EcovecMagnus Damm2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the sh7724 processor code to always enable vpu_clk. On the Ecovec board, set the vpu_clk to 166 Mhz. The 166MHz setting results in a divide-by-6 setup for vpu_clk and improves the VPU performance compared to the power-on-reset/bootloader configuration. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: add sh7724 kick callback to clk_div4_tableMagnus Damm2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a ->kick() callback to clk_div4_table and ties it into sh_clk_div4_set_rate(). A sh7724 specific kick function is also added that updates the KICK bit whenever div4 clocks in FRQCRA and FRQCRB have been set. Allows us to set the VPU clock. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: introduce struct clk_div4_tableMagnus Damm2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces struct clk_div4_table. The structure will be used to keep div4 specific data, and is with this patch replacing the struct clk_div_mult_table pointer arg used by the sh_clk_div4_register() functions. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: clock-cpg div4 set_rate() shift fixMagnus Damm2010-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make sure the div4 bitfield is shifted according to the enable_bit value in sh_clk_div4_set_rate(). Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | sh: Turn on speculative return for SH7785 and SH7786Matt Fleming2010-02-18
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | | Merge branch 'sh/pmb-dynamic'Paul Mundt2010-02-18
| |\ \ \ \
| | * | | | sh: Merge legacy and dynamic PMB modes.Paul Mundt2010-02-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements a bit of rework for the PMB code, which permits us to kill off the legacy PMB mode completely. Rather than trusting the boot loader to do the right thing, we do a quick verification of the PMB contents to determine whether to have the kernel setup the initial mappings or whether it needs to mangle them later on instead. If we're booting from legacy mappings, the kernel will now take control of them and make them match the kernel's initial mapping configuration. This is accomplished by breaking the initialization phase out in to multiple steps: synchronization, merging, and resizing. With the recent rework, the synchronization code establishes page links for compound mappings already, so we build on top of this for promoting mappings and reclaiming unused slots. At the same time, the changes introduced for the uncached helpers also permit us to dynamically resize the uncached mapping without any particular headaches. The smallest page size is more than sufficient for mapping all of kernel text, and as we're careful not to jump to any far off locations in the setup code the mapping can safely be resized regardless of whether we are executing from it or not. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | | | sh: Use uncached I/O helpers in PMB setup.Paul Mundt2010-02-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PMB code is an example of something that spends an absurd amount of time running uncached when only a couple of operations really need to be. This switches over to the shiny new uncached helpers, permitting us to spend far more time running cached. Additionally, MMUCR twiddling is perfectly safe from cached space given that it's paired with a control register barrier, so fix that up, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | | | sh: Provide uncached I/O helpers.Paul Mundt2010-02-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are lots of registers that can only be updated from the uncached mapping, so we add some helpers for those cases in order to make it easier to ensure that we only make the jump when it's absolutely necessary. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | | | sh: PMB locking overhaul.Paul Mundt2010-02-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements some locking for the PMB code. A high level rwlock is added for dealing with rw accesses on the entry map while a per-entry data structure spinlock is added to deal with the PMB entry changing out from underneath us. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-21 15:18:38 -0500