October 2012 - U-Boot

[U-Boot] Performance of the ARM's PL310 L2 cache.
by Lukasz Majewski 01 Oct '12

01 Oct '12

Hi Aneesh, I've enabled the L2 cache for Trats board. Please find results from performance tests. The test function as well as my way for enabling L2 are attached to this e-mail. I simply left the default configuration (number of ways, associativity) as it is at Linux Kernel's driver. Results: test_l2_cache() performed once: L1 L2 TIME [seconds] OFF OFF 90,359 ON OFF 62,236 ON ON 61,687 L1 speedup: ~33 % L2 speedup (when compared to L1): < 1% test_l2_cache() performed 5000 times: L1 L2 TIME [seconds] OFF OFF 444,9 ON OFF 320,55 ON ON 287,21 L1 speedup: ~28 % L2 speedup (when compared to L1): ~ 10% Normal u-boot operation (from system startup - up till passing execution to kernel). L1 L2 TIME [seconds] OFF OFF 1,813 ON OFF 1,552 ON ON 1,533 As one can observe, for normal u-boot operation there is no significant difference. Have you had similar results with OMAP? Do you do more configuration when enabling the L2 at OMAP? The assembly code presented below (armv7/omap-common/lowlevel_init.S) puzzles me a bit... ENTRY(set_pl310_ctrl_reg) LDR r12, =0x102 @ Set PL310 control register - value in R0 .word 0xe1600070 @ SMC #0 - hand assembled @because -march=armv5 @ call ROM Code API to set control @ register ENDPROC(set_pl310_ctrl_reg) Are there any special operations executed at "ROM Code API"? -- Best regards, Lukasz Majewski Samsung Poland R&D Center | Linux Platform Group

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[U-Boot] [NEXT PATCH v1 0/7] In this patchset, a new i.MX35 board is added implementing
by Stefano Babic 01 Oct '12

01 Oct '12

the internal boot mode and using the general SPL Framework. For this reason, this patchset depends on: Tom Rini's SPL generic framework: http://lists.denx.de/pipermail/u-boot/2012-August/132813.html To fix that relocation should not happen in SPL, the following patch is also required: http://patchwork.ozlabs.org/patch/181166/ The woodburn board boots from SD Card. However, the presented way introducing SPL is general, and can applied to other devices. Stefano Babic (7): ARM: Fix start.S when used with SPL in arm1136 NAND: added NAND type to nand_ids MX35: add LOW_LEVEL_SRAM_STACK to use SPL_FRAMEWORK MX35: Add soc_boot_mode and soc_boot_device to MX35 SPL: Added MLO for mx35 SOC to SPL Makefile ARM: Add MLO target to arm1136 MX35: add support for woodburn board MAINTAINERS | 1 + arch/arm/cpu/arm1136/config.mk | 3 + arch/arm/cpu/arm1136/mx35/generic.c | 80 ++++++ arch/arm/cpu/arm1136/start.S | 31 ++- arch/arm/cpu/arm1136/u-boot-spl.lds | 62 +++++ arch/arm/include/asm/arch-mx35/imx-regs.h | 2 + arch/arm/include/asm/arch-mx35/mmc_host_def.h | 31 +++ arch/arm/include/asm/arch-mx35/spl.h | 38 +++ arch/arm/include/asm/arch-mx35/sys_proto.h | 2 + board/woodburn/Makefile | 43 ++++ board/woodburn/imximage.cfg | 4 + board/woodburn/lowlevel_init.S | 93 +++++++ board/woodburn/mx35_sdram.c | 137 +++++++++++ board/woodburn/woodburn.c | 240 ++++++++++++++++++ boards.cfg | 2 + drivers/mtd/nand/nand_ids.c | 2 + include/configs/woodburn.h | 33 +++ include/configs/woodburn_common.h | 322 +++++++++++++++++++++++++ include/configs/woodburn_sd.h | 65 +++++ spl/Makefile | 6 + 20 files changed, 1186 insertions(+), 11 deletions(-) create mode 100644 arch/arm/cpu/arm1136/u-boot-spl.lds create mode 100644 arch/arm/include/asm/arch-mx35/mmc_host_def.h create mode 100644 arch/arm/include/asm/arch-mx35/spl.h create mode 100644 board/woodburn/Makefile create mode 100644 board/woodburn/imximage.cfg create mode 100644 board/woodburn/lowlevel_init.S create mode 100644 board/woodburn/mx35_sdram.c create mode 100644 board/woodburn/woodburn.c create mode 100644 include/configs/woodburn.h create mode 100644 include/configs/woodburn_common.h create mode 100644 include/configs/woodburn_sd.h -- 1.7.9.5

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[U-Boot] [STATUS] [ARM] u-boot-arm/master rebased on current u-boot/master
by Albert ARIBAUD 01 Oct '12

01 Oct '12

Hello, I have rebased u-boot-arm/master onto u-boot/master, as of this writing that's commit 4668a086bb0a769b741e3a4ffab85f1c41c7cdb8 (sandbox: Add asm/errno.h). This is NOT a pull request: there are still at least one pull request to come from u-boot-marvell and individual patches. The pull request should go out on thursday. Any patches you think I should apply for this release, make sure they are assigned to me in patchwork; I'll go through mo todo list oldest patches first. Amicalement, -- Albert.

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[U-Boot] CONFIG_SYS_LBC_BASE in MPC8641HPCN.h
by kathirvelr＠bel.co.in 01 Oct '12

01 Oct '12

Hi all, �� I am using u-boot-2012.07.� I tried to change the #define CONFIG_SYS_LBC_BASE� address in the MPC8641HPCN.h config file� in /include/configs/ for the MPC8641HPCN platform.The u-boot is not coming up when I change the memory map for LBC� base. I changed all other memory maps it is working but when i change the LBC base it is not coming up. Thanks and regards, Kathirvel.R Every 3000 Sheets of paper costs us a tree.. Save trees... Conserve Trees. Don't print this email or any Files unless you really need to!!!! Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Bharat Electronics or support(a)bel.co.in immediately and destroy all copies of this message and any attachments. Email secured by Check Point

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