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* ppc4xx: Fix GPIO handling in lwmon5 and lcd4_lwmon5 BSPStefan Roese2013-09-071-1/+9
| | | | | | | | | | LCD4 needs a slightly different GPIO configuration than the original LWMON5 variant. GPIO49 needs to be configured to a default output value of 0 (permanent voltage supply). Additionally lcd4 also needs to enable the LSB transmitter. Signed-off-by: Stefan Roese <sr@denx.de>
* Merge branch 'master' of git://git.denx.de/u-boot-i2cTom Rini2013-07-241-5/+5
|\ | | | | | | | | | | | | | | | | | | | | The sandburst-specific i2c drivers have been deleted, conflict was just over the SPDX conversion. Conflicts: board/sandburst/common/ppc440gx_i2c.c board/sandburst/common/ppc440gx_i2c.h Signed-off-by: Tom Rini <trini@ti.com>
| * i2c, ppc4xx_i2c: switch to new multibus/multiadapter supportDirk Eibach2013-07-231-4/+5
| | | | | | | | | | | | | | Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc> Cc: Heiko Schocher <hs@denx.de> Cc: Stefan Roese <sr@denx.de> Tested-by: Stefan Roese <sr@denx.de>
| * i2c, soft-i2c: switch to new multibus/multiadapter supportHeiko Schocher2013-07-231-1/+0
| | | | | | | | | | | | | | | | | | - added to soft_i2c driver new multibus/multiadpater support - adapted all config files, which uses this driver Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Stephen Warren <swarren@wwwdotorg.org>
* | Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk2013-07-241-14/+1
|/ | | | | | Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
* ppc4xx: Add lcd4_lwmon5 supportStefan Roese2013-04-221-3/+65
| | | | | | | | | | | | | | This patch adds the fast booting LWMON5 derivat "lcd4_lwmon5". Its a stripped down version of the full blown lwmon5 support, without ECC, USB, POST and some other stuff. It used the newly introduced SPL infrastrucure for SPL from NOR flash booting on the PPC4xx. By setting the environment variable "boot_os" to "yes", Linux will be started from the SPL version. If not, the "normal" U-Boot will be started. Signed-off-by: Stefan Roese <sr@denx.de>
* boards: remove the no longer used CONFIG_EHCI_DCACHEJeroen Hofstee2012-11-201-1/+0
| | | | | | | | | | | | | | | | CONFIG_EHCI_DCACHE was removed by commit b8adb12 "USB: Drop cache flush bloat in EHCI-HCD". Remove the defines from the boards configs as well. Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> cc: Marek Vasut <marex@denx.de> cc: Stefan Roese <sr@denx.de> cc: Tom Rini <trini@ti.com> cc: Wolfgang Denk <wd@denx.de> cc: Thierry Reding <thierry.reding@avionic-design.de> cc: Tom Warren <twarren@nvidia.com> cc: Stephen Warren <swarren@nvidia.com> cc: Stefano Babic <sbabic@denx.de>
* serial: Remove CONFIG_SERIAL_MULTI from config filesMarek Vasut2012-10-151-1/+0
| | | | | | | | | | | | | Remove any notion of CONFIG_SERIAL_MULTI from board config files. Since CONFIG_SERIAL_MULTI is now enabled by default, it is useless to specify this config option in the board config files. Therefore remove it. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Anatolij Gustschin <agust@denx.de> Cc: Stefan Roese <sr@denx.de> Signed-off-by: Tom Rini <trini@ti.com>
* hush.c: Move default CONFIG_SYS_PROMPT_HUSH_PS2 to hush.cTom Rini2012-06-201-3/+0
| | | | | | | | | | Exactly one board has defined CONFIG_SYS_PROMPT_HUSH_PS2 to a value different than "> " which is vision2. I have Cc'd the maintainer here as I strongly suspect this is a bug rather than intentional behavior. Cc: Stefano Babic <sbabic@denx.de> Signed-off-by: Tom Rini <trini@ti.com> Acked-by: Stefano Babic <sbabic@denx.de>
* CMD: Remove CMD_LOG, it's unusedMarek Vasut2012-04-191-1/+0
| | | | | | | | | | | | $ git grep CMD_LOG include/configs/kilauea.h:#define CONFIG_CMD_LOG include/configs/lwmon5.h:#define CONFIG_CMD_LOG include/configs/makalu.h:#define CONFIG_CMD_LOG include/configs/quad100hd.h:#undef CONFIG_CMD_LOG include/configs/zeus.h:#define CONFIG_CMD_LOG Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Anatolij Gustschin <agust@denx.de>
* board configs: drop NET_MULTI referencesMike Frysinger2011-10-051-1/+0
| | | | | | | Now that none of the core checks CONFIG_NET_MULTI, there's not much point in boards defining it. So scrub all references to it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* ppc4xx: Remove PCI support from lwmon5Stefan Roese2011-01-101-17/+0
| | | | | | | PCI is not used at all on lwmon5. So lets remove it. It saves space and reduces boot time a bit (approx. 50ms). Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Update lwmon5 board supportStefan Roese2010-12-171-8/+14
| | | | | | | | | | | | | | This patch includes the following changes for the lwmon5 board support: - Enable cache in SDRAM - Use common EHCI driver instead of the PPC4xx specific OHCI driver This can be done since only high-speed devices are connected. - Remove cached TLB entry again after ECC setup - Use correct define for cache enabling (CONFIG_4xx_DCACHE instead of CONFIG_SYS_ENABLE_SDRAM_CACHE) - Enable FIT image support Signed-off-by: Stefan Roese <sr@denx.de>
* Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated valueWolfgang Denk2010-10-261-2/+1
| | | | | | | | | | | | | | | | | | CONFIG_SYS_GBL_DATA_SIZE has always been just a bad workarond for not being able to use "sizeof(struct global_data)" in assembler files. Recent experience has shown that manual synchronization is not reliable enough. This patch renames CONFIG_SYS_GBL_DATA_SIZE into GENERATED_GBL_DATA_SIZE which gets automatically generated by the asm-offsets tool. In the result, all definitions of this value can be deleted from the board config files. We have to make sure that all files that reference such data include the new <asm-offsets.h> file. No other changes have been done yet, but it is obvious that similar changes / simplifications can be done for other, related macro definitions as well. Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Kumar Gala <galak@kernel.crashing.org>
* Rename CONFIG_SYS_INIT_RAM_END into CONFIG_SYS_INIT_RAM_SIZEWolfgang Denk2010-10-261-2/+2
| | | | | | | | | | | | | | | | | | CONFIG_SYS_INIT_RAM_END was a misnomer as it suggests this might be some end address; to make the meaning more clear we rename it into CONFIG_SYS_INIT_RAM_SIZE No other code changes are performed in this patch, only minor editing of white space (due to the changed length) and the comments was done, where noticed. Note that the code for the PATI and cmi_mpc5xx board configurations looks seriously broken. Last known maintainers on Cc: Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Denis Peter <d.peter@mpl.ch> Cc: Martin Winistoerfer <martinwinistoerfer@gmx.ch> Acked-by: Kumar Gala <galak@kernel.crashing.org>
* post/i2c: Rename I2C_ADDR_LIST to CONFIG_SYS_POST_I2C_ADDRSPeter Tyser2010-10-221-8/+7
| | | | | | | Signed-off-by: Peter Tyser <ptyser@xes-inc.com> Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* ppc4xx/POST: Add board specific UART POST test to lwmon5Stefan Roese2010-10-201-0/+11
| | | | | | | | | Add CONFIG_POST_UART to implement a board specific UART POST test. This is done since lwmon5 needs to set POST_ALWAYS to run this test on each reboot. And we don't want to change the default behavious of this this. Signed-off-by: Stefan Roese <sr@denx.de>
* powerpc: Cleanup BOOTFLAG_* referencesPeter Tyser2010-10-181-8/+0
| | | | | | | | | | | | Now that warm booting is not supported, there isn't a need for the BOOTFLAG_COLD and BOOTFLAG_WARM defines, so remove them. Note that this change makes the board info bd_bootflags field useless. It will always be set to 0, but we leave it around so that we don't break the board info structure that some OSes are expecting to be passed from U-Boot. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* Makefile: move all Power Architecture boards into boards.cfgWolfgang Denk2010-10-181-0/+5
| | | | | | | | | | Clean up Makefile, and drop a lot of the config.mk files on the way. We now also automatically pick all boards that are listed in boards.cfg (and with all configurations), so we can drop the redundant entries from MAKEALL to avoid building these twice. Signed-off-by: Wolfgang Denk <wd@denx.de>
* Rename TEXT_BASE into CONFIG_SYS_TEXT_BASEWolfgang Denk2010-10-181-1/+1
| | | | | | | | | | | | The change is currently needed to be able to remove the board configuration scripting from the top level Makefile and replace it by a simple, table driven script. Moving this configuration setting into the "CONFIG_*" name space is also desirable because it is needed if we ever should move forward to a Kconfig driven configuration system. Signed-off-by: Wolfgang Denk <wd@denx.de>
* ppc4xx: Use common ns16550 functions in 4xx UART POST driverStefan Roese2010-10-041-1/+2
| | | | | | | | | | | | | | | | | This patch changes the PPC4xx POST UART driver to use the common NS16550 functions for receiving and sending. Additionally the local function for SoC divisor setup are removed. Instead the functions from arch/powerpc/cpu/ppc4xx/4xx_uart.c are used. This removes code duplication. Also the common CONFIG_SYS_NS16550_COMx defines are now used to describe the POST UART's. And a compile breakage is fixed, introduced by a git merge of the ppc4xx/next branch into master. Now "ppc4xx.h" is moved to "asm/ppc4xx.h". Fixed as well with this patch. Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Big lwmon5 board support rework/updateSascha Laue2010-10-041-124/+159
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch brings the lwmon5 board support up-to-date. Here a summary of the changes: lwmon5 board port related: - GPIO's changed to control the LSB transmitter - Reset USB PHY's upon power-up - Enable CAN upon power-up - USB init error workaround (errata CHIP_6) - EBC: Enable burstmode and modify the timings for the GDC memory - EBC: Speed up NOR flash timings lwmon5 board POST related: - Add FPGA memory test - Add GDC memory test - DSP POST reworked - SYSMON POST: Fix handling of negative temperatures - Add output for sysmon1 POST - HW-watchdog min. time test reworked Additionally some coding-style changes were done. Signed-off-by: Sascha Laue <sascha.laue@liebherr.com> Signed-off-by: Stefan Roese <sr@denx.de>
* Merge branch 'next' of /home/wd/git/u-boot/nextWolfgang Denk2010-09-281-5/+5
|\ | | | | | | | | | | | | Conflicts: include/ppc4xx.h Signed-off-by: Wolfgang Denk <wd@denx.de>
| * ppc4xx: Use common NS16550 driver for PPC4xx UARTStefan Roese2010-09-231-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the PPC4xx UART driver. Instead the common NS16550 driver is used, since all PPC4xx SoC's use this peripheral device. The file 4xx_uart.c now only implements the UART clock calculation function which also sets the SoC internal UART divisors. All PPC4xx board config headers are changed to use this common NS16550 driver now. Tested on these boards: acadia, canyonlands, katmai, kilauea, sequoia, zeus Signed-off-by: Stefan Roese <sr@denx.de>
* | POST cleanup.Michael Zaidman2010-09-211-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | - Revives POST for blackfin arch; - Removes redundant code: arch/blackfin/lib/post.c arch/powerpc/cpu/ppc4xx/commproc.c arch/powerpc/cpu/mpc512x/common.c - fixes up the post_word_{load|store} usage. Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com> Acked-by: Detlev Zundel <dzu@denx.de> Tested-by: Anatolij Gustschin <agust@denx.de> List of the maintainers of the affected by patch boards: Cc: Stephan Linz <linz@li-pro.net> Cc: Denis Peter <d.peter@mpl.ch> Cc: Matthias Fuchs <matthias.fuchs@esd-electronics.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Stefan Roese <sr@denx.de> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Niklaus Giger <niklaus.giger@netstal.com> Cc: Larry Johnson <lrj@acm.org> Cc: Feng Kan <fkan@amcc.com>
* i2c: Move PPC4xx I2C driver into drivers/i2c directoryStefan Roese2010-04-061-0/+1
| | | | | | | | This patch moves the PPC4xx specific I2C device driver into the I2C drivers directory. All 4xx config headers are updated to include this driver. Signed-off-by: Stefan Roese <sr@denx.de>
* video: mb862xx: add option VIDEO_FB_16BPP_WORD_SWAP for IPEK01Wolfgang Grandegger2009-10-311-0/+1
| | | | | | | | | | In 16 bpp mode, the new IPEK01 board only requires swapping of D16 words for D32 accesses due to the diffferent connecting to the GDC bus. This patch introduces the configuration option VIDEO_FB_16BPP_WORD_SWAP, which should be set for all board using the mb862xx in 16 bpp mode. For the IPEK01, VIDEO_FB_16BPP_PIXEL_SWAP should not be set. Signed-off-by: Wolfgang Grandegger <wg@denx.de>
* video: mb862xx: add option CONFIG_VIDEO_MB862xx_ACCEL for 32bpp modeAnatolij Gustschin2009-10-311-0/+1
| | | | | | | | | | | The new IPEK01 board can use the 32 bpp mode for the Lime graphics controller. For this mode, video accelaration does not work. This patch makes the accelaration configurable via CONFIG_VIDEO_MB862xx_ACCEL, which is enabled for the lwmon5 and the socrates board for backward compatibility. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Wolfgang Grandegger <wg@denx.de>
* video: mb862xx: improve board-specific Lime configurationWolfgang Grandegger2009-10-311-6/+4
| | | | | | | | | | | To avoid board-specific code accessing the mb862xx registers directly, the public function mb862xx_probe() has been introduced. Furthermore, the "Change of Clock Frequency" and "Set Memory I/F Mode" registers are now defined by CONFIG_SYS_MB862xx_CCF and CONFIG_SYS_MB862xx__MMR, respectively. The BSPs for the socrates and lwmon5 boards have been adapted accordingly. Signed-off-by: Wolfgang Grandegger <wg@denx.de>
* Add "source" command; prepare removal of "autoscr" commandWolfgang Denk2009-04-031-1/+1
| | | | | | | | | | | | | | | | | | | | | According to the doc/feature-removal-schedule.txt, the "autoscr" command will be replaced by the "source" command in approximately 6 months from now. This patch prepares this change and starts a 6 month transition period as follows: - The new "source" command has been added, which implements exactly the same functionlaity as the old "autoscr" command before - The old "autoscr" command name is kept as an alias for compatibility - Command sequences, script files atc. have been adapted to use the new "source" command - Related environment variables ("autoscript", "autoscript_uname") have *not* been adapted yet; these will be renamed resp. removed in a separate patch when the support for the "autoscr" command get's finally dropped. Signed-off-by: Wolfgang Denk <wd@denx.de>
* Changed PPC4xx EMAC driver to require CONFIG_PPC4xx_EMACBen Warren2008-11-091-0/+1
| | | | | | | All in-tree IBM/AMCC PPC4xx boards using the EMAC get this new CONFIG Signed-off-by: Ben Warren <biggerbadderben@gmail.com> Acked-by: Stefan Roese <sr@denx.de>
* rename CFG_ macros to CONFIG_SYSJean-Christophe PLAGNIOL-VILLARD2008-10-181-151/+151
| | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* Remove unused CFG_EEPROM_PAGE_WRITE_ENABLE referencesPeter Tyser2008-10-141-1/+0
| | | | Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* rename CFG_ENV macros to CONFIG_ENVJean-Christophe PLAGNIOL-VILLARD2008-09-101-5/+5
| | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* rename CFG_ENV_IS_IN_FLASH in CONFIG_ENV_IS_IN_FLASHJean-Christophe PLAGNIOL-VILLARD2008-09-101-1/+1
| | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* drivers/mtd: Move conditional compilation to MakefileJean-Christophe PLAGNIOL-VILLARD2008-08-131-1/+1
| | | | | | rename CFG_FLASH_CFI_DRIVER to CONFIG_FLASH_CFI_DRIVER Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* Fix printf() format problems with configurable promptsWolfgang Denk2008-07-311-1/+2
| | | | | | | | | | | | | | | U-Boot allows for configurable prompt strings using the CONFIG_AUTOBOOT_PROMPT resp. CONFIG_MENUPROMPT definitions. So far, the assumption was that any such user defined problts would contain exactly one "%d" format specifier. But some boards did not. To allow for flexible boot prompts without adding too complex code we now allow to specify the whole list of printf() arguments in the user definition. This is powerful, but requires a responsible user who really understands what he is doing, as he needs to know for exanple which variables are available in the respective context. Signed-off-by: Wolfgang Denk <wd@denx.de>
* lwmon5: enable OCM post test on lwmon5 boardYuri Tikhonov2008-05-201-0/+6
| | | | Signed-off-by: Ilya Yanok <yanok@emcraft.com>
* lwmon5: minor clean-up to include/configs/lwmon5.hYuri Tikhonov2008-04-291-1/+1
| | | | | | | LWMON5 DSPIC POST uses the watch-dog scratch register. So, make the CFG_DSPIC_TEST_ADDR definition more readable. Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
* ppc4xx: Remove double defines in lwmon5.hStefan Roese2008-04-251-9/+0
| | | | | | introduced with latest lwmon5/POST merge Signed-off-by: Stefan Roese <sr@denx.de>
* lwmon5: watchdog POST fixYuri Tikhonov2008-04-251-5/+6
| | | | | | | | | Use the GPT0_MASKx registers as the temporary storage for watch-dog timer POST test instead of GPT0_COMPx. The latter (GPT0_COMP1..GPT0_COMP5) are used for the log-buffer header. Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com> Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
* Merge branch 'master' of /home/wd/git/u-boot/lwmon5Wolfgang Denk2008-04-251-0/+10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: common/cmd_bootm.c common/cmd_log.c include/common.h post/board/lwmon5/Makefile post/board/lwmon5/dsp.c post/board/lwmon5/dspic.c post/board/lwmon5/fpga.c post/board/lwmon5/gdc.c post/board/lwmon5/sysmon.c post/board/lwmon5/watchdog.c Signed-off-by: Wolfgang Denk <wd@denx.de>
| * lwmon5 watchdog: limit trigger rateYuri Tikhonov2008-04-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Limit the rate of h/w watch-dog triggering on the LWMON5 board by the CONFIG_WD_MAX_RATE value. Note that an earlier version of this patch which used microseconds instead of ticks dis not work. The problem was that we used usec2ticks() to convert microseconds into ticks. usec2ticks() uses get_tbclk(), which in turn calls get_sys_info(). It turns out that this function does a lot of prolonged operations (like divisions) which take too much time so we do not trigger the watchdog in time, and it resets the system. Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
| * The patch introduces the alternative configuration of the log buffer forYuri Tikhonov2008-03-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the lwmon5 board: the storage for the log-buffer itself is OCM(on-chip memory), the log-buffer header is moved to six GPT registers (PPC440EPX_GPT0_COMP1, ..., PPC440EPX_GPT0_COMP5). To enable this, alternative, configuration the U-Boot board configuration file for lwmon5 includes the definitions of alternative addresses for header (CONFIG_ALT_LH_ADDR) and buffer (CONFIG_ALT_LB_ADDR). The Linux shall be configured with the CONFIG_ALT_LB_LOCATION option set, and has the BOARD_ALT_LH_ADDR and BOARD_ALT_LB_ADDR constants defined in the lwmon5 board-specific header (arch/ppc/platforms/4xx/lwmon5.h). Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
| * Add support for the lwmon5 board reset via GPIO58.Yuri Tikhonov2008-03-181-0/+2
| | | | | | | | | | Signed-off-by: Dmitry Rakhchev <rda@emcraft.com> Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
| * The patch adds new POST tests for the Lwmon5 board.Yuri Tikhonov2008-03-181-4/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | These are: * External Watchdog test; * dsPIC tests; * FPGA test; * GDC test; * Sysmon tests. Signed-off-by: Dmitry Rakhchev <rda@emcraft.com> Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
* | lwmon5: disable CONFIG_ZERO_BOOTDELAYSascha Laue2008-04-171-1/+0
| | | | | | | | Signed-off-by: Sascha Laue <sascha.laue@liebherr.com>
* | ppc4xx: Enable ECC on LWMON5Stefan Roese2008-03-271-5/+1
| | | | | | | | | | | | | | | | | | | | | | Since all ECC related problems seem to be resolved on LWMON5, this patch now enables ECC support. We have to write the ECC bytes by zeroing and flushing in smaller steps, since the whole 256MByte takes too long for the external watchdog. Signed-off-by: Stefan Roese <sr@denx.de>
* | ppc: Add CFG_MEM_TOP_HIDE option to hide memory area that doesn't get "touched"Stefan Roese2008-03-271-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If CFG_MEM_TOP_HIDE is defined in the board config header, this specified memory area will get subtracted from the top (end) of ram and won't get "touched" at all by U-Boot. By fixing up gd->ram_size the Linux kernel should gets passed the now "corrected" memory size and won't touch it either. This should work for arch/ppc and arch/powerpc. Only Linux board ports in arch/powerpc with bootwrapper support, which recalculate the memory size from the SDRAM controller setup, will have to get fixed in Linux additionally. This patch enables this config option on some PPC440EPx boards as a workaround for the CHIP 11 errata. Here the description from the AMCC documentation: CHIP_11: End of memory range area restricted access. Category: 3 Overview: The 440EPx DDR controller does not acknowledge any transaction which is determined to be crossing over the end-of-memory-range boundary, even if the starting address is within valid memory space. Any such transaction from any PLB4 master will result in a PLB time-out on PLB4 bus. Impact: In case of such misaligned bursts, PLB4 masters will not retrieve any data at all, just the available data up to the end of memory, especially the 440 CPU. For example, if a CPU instruction required an operand located in memory within the last 7 words of memory, the DCU master would burst read 8 words to update the data cache and cross over the end-of-memory-range boundary. Such a DCU read would not be answered by the DDR controller, resulting in a PLB4 time-out and ultimately in a Machine Check interrupt. The data would be inaccessible to the CPU. Workaround: Forbid any application to access the last 256 bytes of DDR memory. For example, make your operating system believe that the last 256 bytes of DDR memory are absent. AMCC has a patch that does this, available for Linux. This patch sets CFG_MEM_TOP_HIDE for the following 440EPx boards: lwmon5, korat, sequoia The other remaining 440EPx board were intentionally not included since it is not clear to me, if they use the end of ram for some other purpose. This is unclear, since these boards have CONFIG_PRAM defined and even comments like this: PMC440.h: /* esd expects pram at end of physical memory. * So no logbuffer at the moment. */ It is strongly recommended to not use the last 256 bytes on those boards too. Patches from the board maintainers are welcome. Signed-off-by: Stefan Roese <sr@denx.de>
* | The patch introduces the alternative configuration of the log buffer for the ↵Yuri Tikhonov2008-03-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | lwmon5 board: the storage for the log-buffer itself is OCM(on-chip memory), the log-buffer header is moved to six GPT registers (PPC440EPX_GPT0_COMP1, ..., PPC440EPX_GPT0_COMP5). To enable this, alternative, configuration the U-Boot board configuration file for lwmon5 includes the definitions of alternative addresses for header (CONFIG_ALT_LH_ADDR) and buffer (CONFIG_ALT_LB_ADDR). The Linux shall be configured with the CONFIG_ALT_LB_LOCATION option set, and has the BOARD_ALT_LH_ADDR and BOARD_ALT_LB_ADDR constants defined in the lwmon5 board-specific header (arch/ppc/platforms/4xx/lwmon5.h). Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
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