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* powerpc: Convert pmc_owner_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | pmc_owner_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert die.lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | die.lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert tlbivax_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | | tlbivax_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert mpic locks to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | mpic_lock, irq_rover_lock and fixup_lock need to be real spinlocks in RT. Convert them to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert pmac_pic_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | pmac_pic_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert big_irq_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | big_irq_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert feature_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | feature_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert i8259_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | i8259_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert beat_htab_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | beat_htab_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert confirm_error_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | confirm_error_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert ipic_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | ipic_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert native_tlbie_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | native_tlbie_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert beatic_irq_mask_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | beatic_irq_mask_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert nv_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | nv_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Convert context_lock to raw_spinlockThomas Gleixner2010-02-18
| | | | | | | | context_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge commit 'gcl/next' into nextBenjamin Herrenschmidt2010-02-18
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| * powerpc/mpc5121: correct DIU compatible propertyAnatolij Gustschin2010-02-17
| | | | | | | | | | | | | | | | | | The DIU driver should bind against "fsl,mpc5121-diu" directly. Add this compatible property to the match table and fix DTS and platform code accordingly. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/of: added documentation for spi chipselectsErnst Schwab2010-02-17
| | | | | | | | | | | | | | | | | | Added devicetree binding documentation for gpios used as chipselect. The code to evaluate these is already present in spi_mpc8xxx.c. Signed-off-by: Ernst Schwab <eschwab@online.de> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/mpc5121: enable support for more PSC UARTsAnatolij Gustschin2010-02-17
| | | | | | | | | | | | | | | | | | | | MPC5121 has 12 PSC devices. Enable UART support for all of them by defining the number of max. PSCs depending on selection of PPC_MPC512x platform support. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc: doc/dts-bindings: document mpc5121 psc uart dts-bindingsAnatolij Gustschin2010-02-17
| | | | | | | | | | | | | | | | | | | | Support for MPC5121 PSC UART in the mpc52xx_uart driver added new DTS properties for FSL MPC5121 PSC FIFO Controller. Provide documentation of the new properties and some examples. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * serial: mpc52xx_uart: re-enable mpc5121 PSC UART supportAnatolij Gustschin2010-02-17
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently the support for MPC5121 PSC UART in the mpc52xx_uart driver is broken (only console pre-initialized by the bootloader works). Re-enable it now by providing MPC5121 specific ops for PSCx clock activation, FIFO controller init/uninit and MPC5121 PSC FIFO shared interrupt handling functions. Signed-off-by: John Rigby <jcrigby@gmail.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/mpc5121: Add default config for MPC5121Anatolij Gustschin2010-02-16
| | | | | | | | | | | | | | Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Detlev Zundel <dzu@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/mpc5121: update mpc5121ads DTSAnatolij Gustschin2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Collects several changes needed after applying previous mpc5121 platform and driver patches: - Add mpc5121 reset module node - Clean up and fix NAND description, remove unused properties here and correct NAND flash chip size. - Clean up I2C nodes: remove obsolete "cell-index" properties, add "fsl,preserve-clocking" property - Add I2C RTC node for m41t61 RTC - Add I2C nodes for AD7414 temperature sensor and AT24C32CD3 EEPROM - Fix compatible property in DMA node - Clean up CAN nodes, remove unused "cell-index" properties - Fix compatible property in DIU node - USB node changes: - use "fsl,mpc5121-usb2-dr" compatible property only - remove "port0" and "port1" properties as these are only used for multi-port host(MHP) module which is not available on MPC5121. - use 'fsl,invert-drvvbus' and 'fsl,invert-pwr-fault' in USB node for internal PHY to specify polarities of the appropriate port pins. Signed-off-by: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Detlev Zundel <dzu@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/mpc5121: create and register NFC deviceAnatolij Gustschin2010-02-16
| | | | | | | | | | | | | | | | Instantiate NAND Flash Controller device if it's description is found in the device tree. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * rtc: Add MPC5121 Real time clock driverAnatolij Gustschin2010-02-16
| | | | | | | | | | | | | | | | | | | | | | Add support for MPC5121 real time clock module. Signed-off-by: John Rigby <jcrigby@gmail.com> Signed-off-by: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/mpc5121: Add machine restart supportAnatolij Gustschin2010-02-16
| | | | | | | | | | | | | | | | | | | | | | Add reset module registers representation and machine restart callback for mpc5121 platform. Signed-off-by: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * powerpc/mpc5121: avoid using arch_initcall for clock initAnatolij Gustschin2010-02-16
| | | | | | | | | | | | | | | | Move mpc5121_clk_init() call to platform init code so it won't get called on non-5121 platforms on a multiplatform kernel. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | powerpc/85xx: Add NOR, LEDs and PIB support for MPC8568E-MDS boardsAnton Vorontsov2010-02-17
| | | | | | | | | | | | | | | | | | | | | | This patch adds NOR Flash, LEDs and PIB support for MPC8568E-MDS boards. Plus, move bcsr node into localbus node, and add bcsr5 gpio-controller node. Some platform code modifications were also needed. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Enable VME driver on the GE SBC610Martyn Welch2010-02-17
| | | | | | | | | | | | | | Enable the VME driver (which is currently in staging) on the SBC610. Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Enable VME driver on the GE PPC9AMartyn Welch2010-02-17
| | | | | | | | | | | | | | Enable the VME driver (which is currently in staging) on the PPC9A Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Add MSI section to GE PPC9A DTSMalcolm Crossley2010-02-17
| | | | | | | | | | | | | | | | Add the MSI section to the DTS file for the GE PPC9A. Signed-off-by: Malcolm Crossley <malcolm.crossley2@gefanuc.com> Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Switch on highmem support on GE SBC610Martyn Welch2010-02-17
| | | | | | | | | | Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Basic flash support for GE SBC610Martyn Welch2010-02-17
| | | | | | | | | | | | | | | | | | Support for the SBC610 VPX Single Board Computer from GE (PowerPC MPC8641D). This patch adds basic support for the on-board flash. Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Add MSI section to GE SBC610 DTSMalcolm Crossley2010-02-17
| | | | | | | | | | | | | | | | Add the MSI section to the DTS file for the GE SBC610. Signed-off-by: Malcolm Crossley <malcolm.crossley2@gefanuc.com> Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Fix GE SBC310 XMC site supportMalcolm Crossley2010-02-17
| | | | | | | | | | | | | | | | | | Correction to interrupt map mask for GE SBC310 XMC site and addition of alias. Signed-off-by: Malcolm Crossley <malcolm.crossley2@gefanuc.com> Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Add MSI section to GE SBC310 DTSMartyn Welch2010-02-17
| | | | | | | | | | | | | | Add the MSI section to the DTS file for the GE SBC310. Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/fsl-booke: replace a hardcoded constantSebastian Andrzej Siewior2010-02-17
| | | | | | | | | | | | | | | | 24 is offset between the opcode past bl and past rfi. This makes it more obvious. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | Merge commit 'jwb/next' into nextBenjamin Herrenschmidt2010-02-17
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| * | powerpc/40x: Add support for PPC40x boards with > 512MB SDRAMStefan Roese2010-02-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for boards with more that 512MByte RAM. Currently only 512MB of memory are enabled in the DCCR/ICCR real-mode cache control registers. This patch now enables caching in real-mode for 2GByte. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | powerpc/44x: Add MTD support to katmai defconfigStefan Roese2010-02-10
| | | | | | | | | | | | | | | | | | Signed-off-by: Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | powerpc/44x: Update Glacier dtsStefan Roese2010-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sync Glacier dts with latest Canyonlands version: - Add l2 cache support - Add NDFC support - Add RTC support - Add AD7414 hwmon support - Change EMAC compatible node from emac4 to emac4sync and correct the register size - Add support for ISA holes on 4xx PCI/X/E (as done in Benjamin Herrenschmidt's patch for Canyonlands) - Add Crypto device node Signed-off-by: Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | powerpc/44x: Update Arches dtsStefan Roese2010-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sync Arches dts with latest Canyonlands version: - Add 16k FIFO size to supported EMAC nodes - Add next-level-cache property - Add Crypto device node Signed-off-by: Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | powerpc/44x: Add MTD support (NOR FLASH) to Katmai dtsStefan Roese2010-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds NOR FLASH MTD support to the Katmai (440SPe) dts file. For this the OPB ranges address is mapped differently (base 0x00000000 -> 0xe0000000). This results in the address being identical to the lower 32bit of its physical address. This is needed for the MTD mapping to work correctly, since U-Boot will insert the physical addresses of the EBC chip selects into the EBC ranges property. This is the way its done in most other 4xx dts files as well. Additionally with a small whitespace cleanup. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | powerpc/44x: Fix L2-cache support for 460GTStefan Roese2010-02-10
| | | | | | | | | | | | | | | | | | | | | | | | Also set L2C_CFG_RDBW on 460GT platforms and not only on 460EX. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* | | powerpc/booke: Add support for advanced debug registersDave Kleikamp2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | powerpc/booke: Add support for advanced debug registers From: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Based on patches originally written by Torez Smith. This patch defines context switch and trap related functionality for BookE specific Debug Registers. It adds support to ptrace() for setting and getting BookE related Debug Registers Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Cc: Torez Smith <lnxtorez@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Gibson <dwg@au1.ibm.com> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Sergio Durigan Junior <sergiodj@br.ibm.com> Cc: Thiago Jung Bauermann <bauerman@br.ibm.com> Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/booke: Add definitions for advanced debug registersDave Kleikamp2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | powerpc/booke: Add definitions for advanced debug registers From: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Based on patches originally written by Torez Smith. This patch adds additional definitions for BookE Debug Registers to the reg_booke.h header file. Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Acked-by: David Gibson <dwg@au1.ibm.com> Cc: Torez Smith <lnxtorez@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Sergio Durigan Junior <sergiodj@br.ibm.com> Cc: Thiago Jung Bauermann <bauerman@br.ibm.com> Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Extended ptrace interfaceDave Kleikamp2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | powerpc: Extended ptrace interface From: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Based on patches originally written by Torez Smith. Add a new extended ptrace interface so that user-space has a single interface for powerpc, without having to know the specific layout of the debug registers. Implement: PPC_PTRACE_GETHWDEBUGINFO PPC_PTRACE_SETHWDEBUG PPC_PTRACE_DELHWDEBUG Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Acked-by: David Gibson <dwg@au1.ibm.com> Cc: Torez Smith <lnxtorez@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Sergio Durigan Junior <sergiodj@br.ibm.com> Cc: Thiago Jung Bauermann <bauerman@br.ibm.com> Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/booke: Introduce new CONFIG options for advanced debug registersDave Kleikamp2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | powerpc/booke: Introduce new CONFIG options for advanced debug registers From: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Introduce new config options to simplify the ifdefs pertaining to the advanced debug registers for booke and 40x processors: CONFIG_PPC_ADV_DEBUG_REGS - boolean: true for dac-based processors CONFIG_PPC_ADV_DEBUG_IACS - number of IAC registers CONFIG_PPC_ADV_DEBUG_DACS - number of DAC registers CONFIG_PPC_ADV_DEBUG_DVCS - number of DVC registers CONFIG_PPC_ADV_DEBUG_DAC_RANGE - DAC ranges supported Beginning conservatively, since I only have the facilities to test 440 hardware. I believe all 40x and booke platforms support at least 2 IAC and 2 DAC registers. For 440, 4 IAC and 2 DVC registers are enabled, as well as the DAC ranges. Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Acked-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Improve 64bit copy_tofrom_userAnton Blanchard2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Here is a patch from Paul Mackerras that improves the ppc64 copy_tofrom_user. The loop now does 32 bytes at a time and as well as pairing loads and stores. A quick test case that reads 8kB over and over shows the improvement: POWER6: 53% faster POWER7: 51% faster #define _XOPEN_SOURCE 500 #include <stdlib.h> #include <stdio.h> #include <unistd.h> #include <fcntl.h> #include <sys/types.h> #include <sys/stat.h> #define BUFSIZE (8 * 1024) #define ITERATIONS 10000000 int main() { char tmpfile[] = "/tmp/copy_to_user_testXXXXXX"; int fd; char *buf[BUFSIZE]; unsigned long i; fd = mkstemp(tmpfile); if (fd < 0) { perror("open"); exit(1); } if (write(fd, buf, BUFSIZE) != BUFSIZE) { perror("open"); exit(1); } for (i = 0; i < 10000000; i++) { if (pread(fd, buf, BUFSIZE, 0) != BUFSIZE) { perror("pread"); exit(1); } } unlink(tmpfile); return 0; } Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Pair loads and stores in copy_4k_pageAnton Blanchard2010-02-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A number of our chips like loads and stores to be paired. A small kernel module testcase shows the improvement of pairing loads and stores in copy_4k_page: POWER6: +9% POWER7: +1.5% #include <linux/module.h> #include <linux/mm.h> #define ITERATIONS 10000000 static int __init copypage_init(void) { struct timespec before, after; unsigned long i; struct page *destpage, *srcpage; char *dest, *src; destpage = alloc_page(GFP_KERNEL); srcpage = alloc_page(GFP_KERNEL); dest = page_address(destpage); src = page_address(srcpage); getnstimeofday(&before); for (i = 0; i < ITERATIONS; i++) copy_4K_page(dest, src); getnstimeofday(&after); free_page((unsigned long)dest); free_page((unsigned long)src); printk(KERN_DEBUG "copy_4K_page loop took %lu ns\n", (after.tv_sec - before.tv_sec) * NSEC_PER_SEC + (after.tv_nsec - before.tv_nsec)); return 0; } static void __exit copypage_exit(void) { } module_init(copypage_init) module_exit(copypage_exit) MODULE_LICENSE("GPL"); MODULE_AUTHOR("Anton Blanchard"); Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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