September 2012 - U-Boot

[U-Boot] [PATCH v2] configs: mx6qsabre_common.h: Use default clock definitions
by Fabio Estevam 02 Oct '12

02 Oct '12

From: Fabio Estevam <fabio.estevam(a)freescale.com> Since commit 50d4a707f0 (mx5/6: Define default SoC input clock frequencies) we can use the default clock values. Signed-off-by: Fabio Estevam <fabio.estevam(a)freescale.com> --- Changes since v1: - Fix commit id include/configs/mx6qsabre_common.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/include/configs/mx6qsabre_common.h b/include/configs/mx6qsabre_common.h index 1d52b52..247e8d6 100644 --- a/include/configs/mx6qsabre_common.h +++ b/include/configs/mx6qsabre_common.h @@ -18,8 +18,6 @@ #define __MX6QSABRE_COMMON_CONFIG_H #define CONFIG_MX6Q -#define CONFIG_SYS_MX6_HCLK 24000000 -#define CONFIG_SYS_MX6_CLK32 32768 #define CONFIG_DISPLAY_CPUINFO #define CONFIG_DISPLAY_BOARDINFO -- 1.7.9.5

2 1

[U-Boot] [PATCH 1/3] disk: part_efi: parse and store partition UUID
by Stephen Warren 02 Oct '12

02 Oct '12

From: Stephen Warren <swarren(a)nvidia.com> Each EFI partition table entry contains a UUID. Extend U-Boot's struct disk_partition to be able to store this information, and modify get_partition_info_efi() to fill it in. The implementation of uuid_string() was stolen from the Linux kernel. Signed-off-by: Stephen Warren <swarren(a)nvidia.com> --- Note: I made this field part of struct disk_partition, and wrote a generic command to retrieve it, rather than adding an EFI-/GPT-specific command, since I imagine the kernel's PARTUUID support could be extended to support e.g. NT disk signatures, or other partition types, in the future. disk/part.c | 3 +++ disk/part_efi.c | 21 +++++++++++++++++++++ include/part.h | 1 + 3 files changed, 25 insertions(+), 0 deletions(-) diff --git a/disk/part.c b/disk/part.c index 76f3939..266d77e 100644 --- a/disk/part.c +++ b/disk/part.c @@ -294,6 +294,9 @@ void init_part (block_dev_desc_t * dev_desc) int get_partition_info (block_dev_desc_t *dev_desc, int part , disk_partition_t *info) { + /* The common case is no UUID support */ + info->uuid[0] = 0; + switch (dev_desc->part_type) { #ifdef CONFIG_MAC_PARTITION case PART_TYPE_MAC: diff --git a/disk/part_efi.c b/disk/part_efi.c index 02927a0..199c054 100644 --- a/disk/part_efi.c +++ b/disk/part_efi.c @@ -154,6 +154,26 @@ void print_part_efi(block_dev_desc_t * dev_desc) return; } +static void uuid_string(unsigned char *uuid, char *str) +{ + static const u8 le[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, + 12, 13, 14, 15}; + int i; + + for (i = 0; i < 16; i++) { + sprintf(str, "%02x", uuid[le[i]]); + str += 2; + switch (i) { + case 3: + case 5: + case 7: + case 9: + *str++ = '-'; + break; + } + } +} + int get_partition_info_efi(block_dev_desc_t * dev_desc, int part, disk_partition_t * info) { @@ -183,6 +203,7 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part, sprintf((char *)info->name, "%s", print_efiname(&gpt_pte[part - 1])); sprintf((char *)info->type, "U-Boot"); + uuid_string(gpt_pte[part - 1].unique_partition_guid.b, info->uuid); debug("%s: start 0x%lX, size 0x%lX, name %s", __func__, info->start, info->size, info->name); diff --git a/include/part.h b/include/part.h index e1478f4..52002f5 100644 --- a/include/part.h +++ b/include/part.h @@ -93,6 +93,7 @@ typedef struct disk_partition { ulong blksz; /* block size in bytes */ uchar name[32]; /* partition name */ uchar type[32]; /* string type description */ + char uuid[37]; /* filesystem UUID as string, if exists */ } disk_partition_t; /* Misc _get_dev functions */ -- 1.7.0.4

4 9

[U-Boot] Is there file size limiation of tftp
by J.Hwan Kim 02 Oct '12

02 Oct '12

Hi, everyone Is there any limit of file size for tftpboot? I have a problem downloading the file of which file size is 65MB. The procedure stops in the middle of downloading. Thanks in advnace. Best Regards, J.Hwan Kim ----------------------------------------------------------------------------------------------------------------------------- # tftp 0xc0000000 192.168.100.10:system.img smc911x: detected LAN9221 controller smc911x: phy initialized smc911x: MAC c3ea1460M (00405c260a5b) TFTP from server 192.168.100.10; our IP address is 192.168.100.50 Filename 'system.img'. Load address: 0xc0000000 Loading: T ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ##########

5 4

[U-Boot] [PATCH 0/4] Some patman fixes
by Ilya Yanok 02 Oct '12

02 Oct '12

Patman is the great tool but I've found it nearly unusable for me. First of all I need to work with multiple signoffs in commits, then I'd like to use multiline changelog entries and I accostomed to putting changelog enties to the bottom of the commit. These patches fix changelog processing and disables additional signoff and changelog processing. Ilya Yanok (4): patman: fix end of changes detection patman: don't pick changes while processing patches patman: don't mess with changelog patman: don't mess with signoffs tools/patman/patchstream.py | 22 ++++++++++------------ tools/patman/series.py | 5 ++--- 2 files changed, 12 insertions(+), 15 deletions(-) -- 1.7.9.5

3 9

[U-Boot] [PATCH V4 1/4] README: fix references to config_cmd_default.h
by Stephen Warren 02 Oct '12

02 Oct '12

All usage of config_cmd_default.h uses <> for the include statement. Update the README to do the same, rather than using "". Signed-off-by: Stephen Warren <swarren(a)wwwdotorg.org> --- v4: No change v3: No change v2: New patch --- README | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README b/README index dac46f3..a7deaf4 100644 --- a/README +++ b/README @@ -744,8 +744,8 @@ The following options need to be configured: - Monitor Functions: Monitor commands can be included or excluded from the build by using the #include files - "config_cmd_all.h" and #undef'ing unwanted - commands, or using "config_cmd_default.h" + <config_cmd_all.h> and #undef'ing unwanted + commands, or using <config_cmd_default.h> and augmenting with additional #define's for wanted commands. -- 1.7.9.5

3 6

[U-Boot] [PATCH 0/8] EXYNOS5: Enable SPI support
by Rajeshwari Shinde 02 Oct '12

02 Oct '12

This patch set adds SPI driver for EXYNOS5 and enables same. This patchset is based on top of latest V7 I2C patches which are merged in u-boot-i2c. url for same: http://comments.gmane.org/gmane.comp.boot-loaders.u-boot/136058 Rajeshwari Shinde (8): EXYNOS5: Add pinmux support for SPI SPI: Add W25Q32 to Winbond SPI flash table EXYNOS: Add clock for SPI. EXYNOS5: Add base address for SPI. SPI: Add SPI slave mode flag SPI: Add SPI Driver for EXYNOS. EXYNOS5: Enable SPI EXYNOS5: Enable SPI booting. arch/arm/cpu/armv7/exynos/clock.c | 122 +++++++ arch/arm/cpu/armv7/exynos/pinmux.c | 51 +++- arch/arm/include/asm/arch-exynos/clk.h | 4 +- arch/arm/include/asm/arch-exynos/cpu.h | 6 + arch/arm/include/asm/arch-exynos/periph.h | 5 + arch/arm/include/asm/arch-exynos/pinmux.h | 3 + arch/arm/include/asm/arch-exynos/spi.h | 78 ++++ board/samsung/smdk5250/Makefile | 2 +- board/samsung/smdk5250/smdk5250.c | 3 + board/samsung/smdk5250/{mmc_boot.c => spl_boot.c} | 31 ++- drivers/mtd/spi/winbond.c | 8 + drivers/spi/Makefile | 1 + drivers/spi/exynos_spi.c | 400 +++++++++++++++++++++ include/configs/smdk5250.h | 28 ++- include/spi.h | 1 + 15 files changed, 737 insertions(+), 6 deletions(-) create mode 100644 arch/arm/include/asm/arch-exynos/spi.h rename board/samsung/smdk5250/{mmc_boot.c => spl_boot.c} (66%) create mode 100644 drivers/spi/exynos_spi.c -- 1.7.4.4

3 10

[U-Boot] [PATCH 0/8 V2] EXYNOS5: Enable SPI support
by Rajeshwari Shinde 02 Oct '12

02 Oct '12

This patch set adds SPI driver for EXYNOS5 and enables same. This patchset is based on top of latest V7 I2C patches which are merged in u-boot-i2c. url for same: http://comments.gmane.org/gmane.comp.boot-loaders.u-boot/136058 Changes in V2: - Correted the Commit message. Rajeshwari Shinde (8): EXYNOS5: Add pinmux support for SPI SPI: Add W25Q32 to Winbond SPI flash table EXYNOS: Add clock for SPI. EXYNOS5: Add base address for SPI. SPI: Add SPI slave mode flag SPI: Add SPI Driver for EXYNOS. EXYNOS5: Enable SPI EXYNOS5: Enable SPI booting. arch/arm/cpu/armv7/exynos/clock.c | 122 +++++++ arch/arm/cpu/armv7/exynos/pinmux.c | 51 +++- arch/arm/include/asm/arch-exynos/clk.h | 4 +- arch/arm/include/asm/arch-exynos/cpu.h | 6 + arch/arm/include/asm/arch-exynos/periph.h | 5 + arch/arm/include/asm/arch-exynos/pinmux.h | 3 + arch/arm/include/asm/arch-exynos/spi.h | 78 ++++ board/samsung/smdk5250/Makefile | 2 +- board/samsung/smdk5250/smdk5250.c | 3 + board/samsung/smdk5250/{mmc_boot.c => spl_boot.c} | 31 ++- drivers/mtd/spi/winbond.c | 8 + drivers/spi/Makefile | 1 + drivers/spi/exynos_spi.c | 400 +++++++++++++++++++++ include/configs/smdk5250.h | 28 ++- include/spi.h | 1 + 15 files changed, 737 insertions(+), 6 deletions(-) create mode 100644 arch/arm/include/asm/arch-exynos/spi.h rename board/samsung/smdk5250/{mmc_boot.c => spl_boot.c} (66%) create mode 100644 drivers/spi/exynos_spi.c -- 1.7.4.4

3 14

[U-Boot] help with archos g9 "port"
by SxDx 02 Oct '12

02 Oct '12

Dear U-Boot hackers, I am trying to let U-Boot work with my archos g9 (omap4430 based-tablet). I tried with u-boot-2012.07.tar.bz2 So far I succeeded in booting an MLO and u-boot.img from a FAT SD-card after issuing a warm-reboot in a rooted android. But then I have very random results when loading a file in memory and running a "go 0x82000000". I compiled without thumb and had to change the base address (0x40300000). I modified memory settings, based on pandaboard (also a OMAP4430 device). (I don't know if all the settings are correct or not.) I did not modify anything else, especially MUX settings and clocks. But since the device successfully accesses the sd-card and load files from there I guess things are "not too bad". (barebox fails at that point) To test things, I added a simple function "reboot" to U-Boot that issues a warm-reboot after setting good values for registers in the SAR RAM zone. That zone is not touched by android and I then can read /dev/mem in linux to see the data there. So I can see values from U-Boot. A bit cumbersome but works fine. And to boot from the sd-card, I made a program "reboot-sd", run as root in android that does the same, but in linux, not U-Boot. (I hope I am clear.) >From where I am, I am a bit lost. Calling "reboot" in U-Boot reboots okay. But creating a uImage file containing the same code, loading it with fatload at 0x82000000 and doing a "go" there fails (ie. the device does not reboot). Why? I can see that it is loaded okay. So why jumping there fails. To be correct, in fact it sometimes works, but most of the time fails. Very random and strange behavior. So, I ask for some help. Where to look from that point? Is the MUX thing an issue? Or maybe the uImage code runs fine but the reboot it is supposed to do is not done for whatever reason? So it could be: 1 - problem with how I hacked U-Boot 2 - problem with the payload (uImage simply does a warm reboot for now) The ultimate goal is to load the linux kernel. I apologize by advance if I describe things badly, but I don't really know what to do now... Thanks for your help, Cédric.

1 1

[U-Boot] [PATCH v2] tegra: add Colibri T20 board support
by Lucas Stach 01 Oct '12

01 Oct '12

This adds board support for the Toradex Colibri T20 module. Working functions: - SD card boot - USB boot - Network - NAND environment Signed-off-by: Lucas Stach <dev(a)lynxeye.de> CC: Stephen Warren <swarren(a)wwwdotorg.org> CC: Tom Warren <twarren.nvidia(a)gmail.com> --- v2: rename .dts file to match board name --- MAINTAINERS | 4 ++ board/toradex/colibri_t20/Makefile | 38 ++++++++++++++ board/toradex/colibri_t20/colibri_t20.c | 64 +++++++++++++++++++++++ board/toradex/dts/tegra20-colibri_t20.dts | 39 ++++++++++++++ boards.cfg | 1 + include/configs/colibri_t20.h | 84 +++++++++++++++++++++++++++++++ 6 Dateien geändert, 230 Zeilen hinzugefügt(+) create mode 100644 board/toradex/colibri_t20/Makefile create mode 100644 board/toradex/colibri_t20/colibri_t20.c create mode 100644 board/toradex/dts/tegra20-colibri_t20.dts create mode 100644 include/configs/colibri_t20.h diff --git a/MAINTAINERS b/MAINTAINERS index a00e850..6b3e9a4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -890,6 +890,10 @@ Matt Sealey <matt(a)genesi-usa.com> Bo Shen <voice.shen(a)atmel.com> at91sam9x5ek ARM926EJS (AT91SAM9G15,G25,G35,X25,X35 SoC) +Lucas Stach <dev(a)lynxeye.de> + + colibri_t20 Tegra20 (ARM7 & A9 Dual Core) + Nick Thompson <nick.thompson(a)gefanuc.com> da830evm ARM926EJS (DA830/OMAP-L137) diff --git a/board/toradex/colibri_t20/Makefile b/board/toradex/colibri_t20/Makefile new file mode 100644 index 0000000..b8c61b6 --- /dev/null +++ b/board/toradex/colibri_t20/Makefile @@ -0,0 +1,38 @@ +# +# (C) Copyright 2012 Lucas Stach +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# + +include $(TOPDIR)/config.mk + +$(shell mkdir -p $(obj)../../nvidia/common) + +LIB = $(obj)lib$(BOARD).o + +COBJS := ../../nvidia/common/board.o +COBJS += $(BOARD).o + +SRCS := $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS)) + +$(LIB): $(obj).depend $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### \ No newline at end of file diff --git a/board/toradex/colibri_t20/colibri_t20.c b/board/toradex/colibri_t20/colibri_t20.c new file mode 100644 index 0000000..0ad4311 --- /dev/null +++ b/board/toradex/colibri_t20/colibri_t20.c @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2010,2011 NVIDIA Corporation <www.nvidia.com> + * Copyright (C) 2012 Lucas Stach + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <common.h> +#include <asm/gpio.h> +#include <asm/arch/clock.h> +#include <asm/arch/funcmux.h> +#include <asm/arch/pinmux.h> +#include <asm/arch-tegra/board.h> +#include <asm/arch-tegra/sys_proto.h> +#include <asm/arch-tegra/tegra.h> + +#ifdef CONFIG_TEGRA_MMC +#include <asm/arch-tegra/mmc.h> +#endif + +#ifdef CONFIG_USB_EHCI_TEGRA +void pin_mux_usb(void) +{ + /* USB 1 aka Tegra USB port 3 */ + pinmux_tristate_disable(PINGRP_SPIG); + + /* USB 3 aka Tegra USB port 2 */ + funcmux_select(PERIPH_ID_USB2, FUNCMUX_USB2_ULPI); + pinmux_tristate_disable(PINGRP_UAC); + /* ULPI reference clock output */ + pinmux_set_func(PINGRP_CDEV2, PMUX_FUNC_PLLP_OUT4); + pinmux_tristate_disable(PINGRP_CDEV2); + /* VBus GPIO */ + pinmux_tristate_disable(PINGRP_DTE); +} +#endif + +#ifdef CONFIG_TEGRA_MMC +int board_mmc_init(bd_t *bd) +{ + funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_4_BIT); + pinmux_tristate_disable(PINGRP_GMB); + + tegra_mmc_init(0, 4, -1, GPIO_PC7); + + return 0; +} +#endif + +#ifdef CONFIG_TEGRA_NAND +void pin_mux_nand(void) +{ + funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_NDFLASH_KBC_8_BIT); +} +#endif diff --git a/board/toradex/dts/tegra20-colibri_t20.dts b/board/toradex/dts/tegra20-colibri_t20.dts new file mode 100644 index 0000000..29db0c8 --- /dev/null +++ b/board/toradex/dts/tegra20-colibri_t20.dts @@ -0,0 +1,39 @@ +/dts-v1/; + +/include/ ARCH_CPU_DTS + +/ { + model = "Toradex Colibri T20"; + compatible = "toradex,t20", "nvidia,tegra20"; + + aliases { + /* This defines the order of our USB ports */ + usb0 = "/usb@c5008000"; + usb1 = "/usb@c5000000"; + usb2 = "/usb@c5004000"; + }; + + usb@c5000000 { + dr_mode = "otg"; + }; + + usb@c5004000 { + nvidia,phy-reset-gpio = <&gpio 169 0>; /* PV1 */ + nvidia,vbus-gpio = <&gpio 217 0>; /* PBB1 */ + }; + + usb@c5008000 { + nvidia,vbus-gpio = <&gpio 178 1>; /* PW2 low-active */ + }; + + nand-controller@70008000 { + nvidia,wp-gpios = <&gpio 144 0>; /* PS0 */ + nvidia,width = <8>; + nvidia,timing = <15 100 25 80 25 10 15 10 100>; + + nand@0 { + reg = <0>; + compatible = "nand-flash"; + }; + }; +}; diff --git a/boards.cfg b/boards.cfg index 4ae6656..1a33b44 100644 --- a/boards.cfg +++ b/boards.cfg @@ -270,6 +270,7 @@ harmony arm armv7:arm720t harmony nvidia seaboard arm armv7:arm720t seaboard nvidia tegra20 ventana arm armv7:arm720t ventana nvidia tegra20 whistler arm armv7:arm720t whistler nvidia tegra20 +colibri_t20 arm armv7:arm720t colibri_t20 toradex tegra20 u8500_href arm armv7 u8500 st-ericsson u8500 snowball arm armv7 snowball st-ericsson u8500 actux1_4_16 arm ixp actux1 - - actux1:FLASH2X2 diff --git a/include/configs/colibri_t20.h b/include/configs/colibri_t20.h new file mode 100644 index 0000000..9958d5d --- /dev/null +++ b/include/configs/colibri_t20.h @@ -0,0 +1,84 @@ +/* + * Copyright (C) 2012 Lucas Stach + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __CONFIG_H +#define __CONFIG_H + +#include "tegra20-common.h" + +/* Enable FDT support */ +#define CONFIG_DEFAULT_DEVICE_TREE tegra20-colibri_t20 +#define CONFIG_OF_CONTROL +#define CONFIG_OF_SEPARATE + +/* High-level configuration options */ +#define V_PROMPT "Tegra20 (Colibri) # " +#define CONFIG_TEGRA_BOARD_STRING "Toradex Colibri T20" + +/* Board-specific serial config */ +#define CONFIG_TEGRA_ENABLE_UARTA +#define CONFIG_TEGRA_UARTA_SDIO1 +#define CONFIG_SYS_NS16550_COM1 NV_PA_APB_UARTA_BASE + +#define CONFIG_BOARD_EARLY_INIT_F + +/* SD/MMC support */ +#define CONFIG_MMC +#define CONFIG_GENERIC_MMC +#define CONFIG_TEGRA_MMC +#define CONFIG_CMD_MMC + +/* File system support */ +#define CONFIG_DOS_PARTITION +#define CONFIG_EFI_PARTITION +#define CONFIG_CMD_EXT2 +#define CONFIG_CMD_FAT + +/* USB host support */ +#define CONFIG_USB_EHCI +#define CONFIG_USB_EHCI_TEGRA +#define CONFIG_USB_ULPI +#define CONFIG_USB_ULPI_VIEWPORT +#define CONFIG_USB_STORAGE +#define CONFIG_USB_MAX_CONTROLLER_COUNT 3 +#define CONFIG_CMD_USB + +/* USB networking support */ +#define CONFIG_USB_HOST_ETHER +#define CONFIG_USB_ETHER_ASIX +#define CONFIG_CMD_NET +#define CONFIG_CMD_DHCP +#define CONFIG_CMD_NFS +#define CONFIG_CMD_PING + +/* NAND support */ +#define CONFIG_CMD_NAND +#define CONFIG_TEGRA_NAND +#define CONFIG_SYS_MAX_NAND_DEVICE 1 +#define CONFIG_SYS_NAND_BASE TEGRA20_NAND_BASE + +/* Environment in NAND, 64K is a bit excessive but erase block is 512K anyway */ +#define CONFIG_ENV_IS_IN_NAND +#define CONFIG_ENV_OFFSET (SZ_2M) +#undef CONFIG_ENV_SIZE /* undef size from tegra20-common.h */ +#define CONFIG_ENV_SIZE (SZ_64K) + +/* Debug commands */ +#define CONFIG_CMD_BDI +#define CONFIG_CMD_CACHE + +#include "tegra-common-post.h" + +#endif /* __CONFIG_H */ -- 1.7.11.4

2 3

[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

3 3