From 94c0f0b177a17d419b319d173d21e23c432385b4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marek=20Beh=C3=BAn?= Date: Fri, 20 Oct 2023 16:29:16 +0200 Subject: arm: mvebu: turris_mox: Extend to support RIPE Atlas Probe MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Extend Turris Mox board code to support CZ.NIC's RIPE Atlas Probe. Signed-off-by: Marek BehĂșn Reviewed-by: Stefan Roese --- arch/arm/dts/Makefile | 1 + arch/arm/dts/armada-3720-ripe-atlas.dts | 91 +++++++++++++++++++++++++++++++++ arch/arm/mach-mvebu/Kconfig | 6 ++- board/CZ.NIC/turris_mox/mox_sp.c | 12 +++-- board/CZ.NIC/turris_mox/mox_sp.h | 8 ++- board/CZ.NIC/turris_mox/turris_mox.c | 72 +++++++++++++++++++++++--- configs/turris_mox_defconfig | 3 +- 7 files changed, 180 insertions(+), 13 deletions(-) create mode 100644 arch/arm/dts/armada-3720-ripe-atlas.dts diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile index 70079974fa6..55aceb51cdb 100644 --- a/arch/arm/dts/Makefile +++ b/arch/arm/dts/Makefile @@ -322,6 +322,7 @@ else dtb-$(CONFIG_ARCH_MVEBU) += \ armada-3720-db.dtb \ armada-3720-espressobin.dtb \ + armada-3720-ripe-atlas.dtb \ armada-3720-turris-mox.dtb \ armada-3720-eDPU.dtb \ armada-3720-uDPU.dtb \ diff --git a/arch/arm/dts/armada-3720-ripe-atlas.dts b/arch/arm/dts/armada-3720-ripe-atlas.dts new file mode 100644 index 00000000000..4457845266f --- /dev/null +++ b/arch/arm/dts/armada-3720-ripe-atlas.dts @@ -0,0 +1,91 @@ +// SPDX-License-Identifier: GPL-2.0+ or X11 +/* + * Device Tree file for CZ.NIC' RIPE Atlas Probe + * 2021 by Marek BehĂșn + */ + +/dts-v1/; + +#include +#include +#include "armada-372x.dtsi" + +/ { + model = "CZ.NIC's RIPE Atlas Probe"; + compatible = "cznic,ripe-atlas", "marvell,armada3720", + "marvell,armada3710"; + + aliases { + ethernet0 = ð0; + mmc0 = &sdhci0; + }; + + chosen { + stdout-path = "serial0:115200n8"; + }; + + memory { + device_type = "memory"; + reg = <0x00000000 0x00000000 0x00000000 0x20000000>; + }; + + leds { + compatible = "gpio-leds"; + + led { + gpios = <&gpiosb 21 GPIO_ACTIVE_LOW>; + color = ; + function = LED_FUNCTION_ACTIVITY; + }; + }; + + vsdc_reg: vsdc-reg { + compatible = "regulator-gpio"; + regulator-name = "vsdc"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + + gpios = <&gpiosb 23 GPIO_ACTIVE_HIGH>; + gpios-states = <0>; + states = <1800000 0x1 + 3300000 0x0>; + enable-active-high; + }; +}; + +&comphy { + status = "disabled"; +}; + +&mdio { + pinctrl-names = "default"; + pinctrl-0 = <&smi_pins>; + status = "okay"; + + phy1: ethernet-phy@1 { + reg = <1>; + }; +}; + +ð0 { + pinctrl-names = "default"; + pinctrl-0 = <&rgmii_pins>; + phy-mode = "rgmii"; + phy-handle = <&phy1>; + status = "okay"; +}; + +&sdhci0 { + bus-width = <8>; + non-removable; + vqmmc-supply = <&vsdc_reg>; + marvell,pad-type = "sd"; + status = "okay"; +}; + +&uart0 { + pinctrl-names = "default"; + pinctrl-0 = <&uart1_pins>; + status = "okay"; +}; diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig index 5c7f4bf964a..c80d8587b14 100644 --- a/arch/arm/mach-mvebu/Kconfig +++ b/arch/arm/mach-mvebu/Kconfig @@ -144,8 +144,12 @@ config TARGET_TURRIS_OMNIA select ATSHA204A config TARGET_TURRIS_MOX - bool "Support Turris Mox" + bool "Support CZ.NIC's Turris Mox / RIPE Atlas Probe" select ARMADA_3700 + select BOARD_TYPES + select ENV_IS_IN_MMC + select ENV_IS_IN_SPI_FLASH + select MULTI_DTB_FIT config TARGET_MVEBU_ARMADA_8K bool "Support Armada 7k/8k platforms" diff --git a/board/CZ.NIC/turris_mox/mox_sp.c b/board/CZ.NIC/turris_mox/mox_sp.c index 87f67512fba..11d87564717 100644 --- a/board/CZ.NIC/turris_mox/mox_sp.c +++ b/board/CZ.NIC/turris_mox/mox_sp.c @@ -10,6 +10,8 @@ #include #include +#include "mox_sp.h" + const char *mox_sp_get_ecdsa_public_key(void) { static char public_key[135]; @@ -42,12 +44,13 @@ static inline void res_to_mac(u8 *mac, u32 t1, u32 t2) mac[5] = t2; } -int mbox_sp_get_board_info(u64 *sn, u8 *mac1, u8 *mac2, int *bv, int *ram) +int mbox_sp_get_board_info(u64 *sn, u8 *mac1, u8 *mac2, int *bv, int *ram, + enum cznic_a3720_board *board) { - u32 out[8]; + u32 out[9]; int res; - res = mbox_do_cmd(MBOX_CMD_BOARD_INFO, NULL, 0, out, 8); + res = mbox_do_cmd(MBOX_CMD_BOARD_INFO, NULL, 0, out, 9); if (res < 0) return res; @@ -69,5 +72,8 @@ int mbox_sp_get_board_info(u64 *sn, u8 *mac1, u8 *mac2, int *bv, int *ram) if (mac2) res_to_mac(mac2, out[6], out[7]); + if (board) + *board = out[8] + 1; + return 0; } diff --git a/board/CZ.NIC/turris_mox/mox_sp.h b/board/CZ.NIC/turris_mox/mox_sp.h index 83b60374585..720880d5df3 100644 --- a/board/CZ.NIC/turris_mox/mox_sp.h +++ b/board/CZ.NIC/turris_mox/mox_sp.h @@ -8,8 +8,14 @@ #include +enum cznic_a3720_board { + BOARD_UNDEFINED = 0x0, + BOARD_TURRIS_MOX = 0x1, + BOARD_RIPE_ATLAS = 0x3, +}; + const char *mox_sp_get_ecdsa_public_key(void); int mbox_sp_get_board_info(u64 *sn, u8 *mac1, u8 *mac2, int *bv, - int *ram); + int *ram, enum cznic_a3720_board *board); #endif /* _BOARD_CZNIC_TURRIS_MOX_MOX_SP_H_ */ diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c index 370c2668b08..63b86992194 100644 --- a/board/CZ.NIC/turris_mox/turris_mox.c +++ b/board/CZ.NIC/turris_mox/turris_mox.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -45,6 +46,26 @@ DECLARE_GLOBAL_DATA_PTR; +int board_fit_config_name_match(const char *name) +{ + if (!gd->board_type) { + enum cznic_a3720_board board; + + if (mbox_sp_get_board_info(NULL, NULL, NULL, NULL, NULL, + &board) < 0) { + printf("Cannot determine board, defaulting to Turris MOX!\n"); + board = BOARD_TURRIS_MOX; + } + + gd->board_type = board; + } + + return !((gd->board_type == BOARD_TURRIS_MOX && + !strcmp(name, "armada-3720-turris-mox")) || + (gd->board_type == BOARD_RIPE_ATLAS && + !strcmp(name, "armada-3720-ripe-atlas"))); +} + #if defined(CONFIG_OF_BOARD_FIXUP) int board_fix_fdt(void *blob) { @@ -53,6 +74,9 @@ int board_fix_fdt(void *blob) int i, size, ret; bool eth1_sgmii; + if (gd->board_type != BOARD_TURRIS_MOX) + return 0; + /* * SPI driver is not loaded in driver model yet, but we have to find out * if pcie should be enabled in U-Boot's device tree. Therefore we have @@ -388,16 +412,23 @@ static void load_spi_dtb(void) int misc_init_r(void) { + int i, ret, addrcnt; u8 mac[2][6]; - int i, ret; - ret = mbox_sp_get_board_info(NULL, mac[0], mac[1], NULL, NULL); + ret = mbox_sp_get_board_info(NULL, mac[0], mac[1], NULL, NULL, NULL); if (ret < 0) { printf("Cannot read data from OTP!\n"); return 0; } - for (i = 0; i < 2; ++i) { + if (gd->board_type == BOARD_TURRIS_MOX) + addrcnt = 2; + else if (gd->board_type == BOARD_RIPE_ATLAS) + addrcnt = 1; + else + addrcnt = 0; + + for (i = 0; i < addrcnt; ++i) { u8 oldmac[6]; if (is_valid_ethaddr(mac[i]) && @@ -405,7 +436,13 @@ int misc_init_r(void) eth_env_set_enetaddr_by_index("eth", i, mac[i]); } - load_spi_dtb(); + if (gd->board_type == BOARD_RIPE_ATLAS) { + env_set("board", "ripe_atlas"); + env_set("board_name", "ripe_atlas"); + env_set("fdtfile", "marvell/armada-3720-ripe-atlas.dtb"); + } else { + load_spi_dtb(); + } return 0; } @@ -528,14 +565,15 @@ static void handle_reset_button(void) int show_board_info(void) { int i, ret, board_version, ram_size, is_sd; - const char *pub_key; + const char *pub_key, *model; const u8 *topology; u64 serial_number; - printf("Model: CZ.NIC Turris Mox Board\n"); + model = fdt_getprop(gd->fdt_blob, 0, "model", NULL); + printf("Model: %s\n", model); ret = mbox_sp_get_board_info(&serial_number, NULL, NULL, &board_version, - &ram_size); + &ram_size, NULL); if (ret < 0) { printf(" Cannot read board info: %i\n", ret); } else { @@ -550,6 +588,9 @@ int show_board_info(void) else printf(" Cannot read ECDSA Public Key\n"); + if (gd->board_type != BOARD_TURRIS_MOX) + return 0; + ret = mox_get_topology(&topology, &module_count, &is_sd); if (ret) printf("Cannot read module topology!\n"); @@ -668,10 +709,24 @@ err: return NULL; } +enum env_location env_get_location(enum env_operation op, int prio) +{ + if (prio > 0) + return ENVL_UNKNOWN; + + if (gd->board_type == BOARD_RIPE_ATLAS) + return ENVL_MMC; + + return ENVL_SPI_FLASH; +} + static int last_stage_init(void) { struct gpio_desc reset_gpio = {}; + if (gd->board_type != BOARD_TURRIS_MOX) + return 0; + /* configure modules */ if (get_reset_gpio(&reset_gpio) < 0) goto handle_reset_btn; @@ -801,6 +856,9 @@ int ft_board_setup(void *blob, struct bd_info *bd) { int res; + if (gd->board_type != BOARD_TURRIS_MOX) + return 0; + /* * If MOX B (PCI), MOX F (USB) or MOX G (Passthrough PCI) modules are * connected, enable the PCIe node. diff --git a/configs/turris_mox_defconfig b/configs/turris_mox_defconfig index e0ca6337bd6..c9815b612f0 100644 --- a/configs/turris_mox_defconfig +++ b/configs/turris_mox_defconfig @@ -52,9 +52,10 @@ CONFIG_CMD_HASH=y CONFIG_CMD_BTRFS=y CONFIG_CMD_EXT4_WRITE=y CONFIG_MAC_PARTITION=y +CONFIG_OF_LIST="armada-3720-turris-mox armada-3720-ripe-atlas" CONFIG_ENV_OVERWRITE=y -CONFIG_ENV_IS_IN_SPI_FLASH=y CONFIG_SYS_RELOC_GD_ENV_ADDR=y +CONFIG_SYS_MMC_ENV_PART=2 CONFIG_ARP_TIMEOUT=200 CONFIG_NET_RETRY_COUNT=50 CONFIG_NETCONSOLE=y -- cgit v1.2.3 From 81d2c54e38150b4c55685fcb91a4434d2327cf25 Mon Sep 17 00:00:00 2001 From: Tony Dinh Date: Tue, 24 Oct 2023 16:17:08 -0700 Subject: arm: kirkwood: Enable bootstd for Pogo V4 board Enable bootstd for Pogo V4 board, and remove distroboot. Signed-off-by: Tony Dinh Reviewed-by: Stefan Roese --- configs/pogo_v4_defconfig | 3 ++- include/configs/pogo_v4.h | 35 ++--------------------------------- 2 files changed, 4 insertions(+), 34 deletions(-) diff --git a/configs/pogo_v4_defconfig b/configs/pogo_v4_defconfig index 2747c3c72d9..ff6411d8949 100644 --- a/configs/pogo_v4_defconfig +++ b/configs/pogo_v4_defconfig @@ -17,7 +17,8 @@ CONFIG_IDENT_STRING="\nPogoplug V4" CONFIG_SYS_LOAD_ADDR=0x800000 CONFIG_PCI=y CONFIG_LTO=y -CONFIG_DISTRO_DEFAULTS=y +CONFIG_BOOTSTD_FULL=y +CONFIG_BOOTSTD_DEFAULTS=y CONFIG_BOOTSTAGE=y CONFIG_SHOW_BOOT_PROGRESS=y CONFIG_BOOTDELAY=10 diff --git a/include/configs/pogo_v4.h b/include/configs/pogo_v4.h index 33715790233..d5003538da3 100644 --- a/include/configs/pogo_v4.h +++ b/include/configs/pogo_v4.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0+ */ /* - * Copyright (C) 2014-2022 Tony Dinh + * Copyright (C) 2014-2023 Tony Dinh * * Based on * Copyright (C) 2012 @@ -21,33 +21,6 @@ */ #include "mv-common.h" -/* Include the common distro boot environment */ -#ifndef CONFIG_SPL_BUILD - -#ifdef CONFIG_MMC -#define BOOT_TARGET_DEVICES_MMC(func) func(MMC, mmc, 0) -#else -#define BOOT_TARGET_DEVICES_MMC(func) -#endif - -#ifdef CONFIG_SATA -#define BOOT_TARGET_DEVICES_SATA(func) func(SATA, sata, 0) -#else -#define BOOT_TARGET_DEVICES_SATA(func) -#endif - -#ifdef CONFIG_USB_STORAGE -#define BOOT_TARGET_DEVICES_USB(func) func(USB, usb, 0) -#else -#define BOOT_TARGET_DEVICES_USB(func) -#endif - -#define BOOT_TARGET_DEVICES(func) \ - BOOT_TARGET_DEVICES_MMC(func) \ - BOOT_TARGET_DEVICES_USB(func) \ - BOOT_TARGET_DEVICES_SATA(func) \ - func(DHCP, dhcp, na) - #define KERNEL_ADDR_R __stringify(0x800000) #define FDT_ADDR_R __stringify(0x2c00000) #define RAMDISK_ADDR_R __stringify(0x01100000) @@ -59,14 +32,10 @@ "ramdisk_addr_r=" RAMDISK_ADDR_R "\0" \ "scriptaddr=" SCRIPT_ADDR_R "\0" -#include - #define CFG_EXTRA_ENV_SETTINGS \ LOAD_ADDRESS_ENV_SETTINGS \ "fdtfile=" CONFIG_DEFAULT_DEVICE_TREE ".dtb\0" \ "mtdparts=" CONFIG_MTDPARTS_DEFAULT "\0" \ - "console=ttyS0,115200\0" \ - BOOTENV -#endif /* CONFIG_SPL_BUILD */ + "console=ttyS0,115200\0" #endif /* _CONFIG_POGO_V4_H */ -- cgit v1.2.3 From a5539f976b9d5317ba893c6ba63afd9424498eeb Mon Sep 17 00:00:00 2001 From: Josua Mayer Date: Wed, 25 Oct 2023 10:22:53 +0200 Subject: arm: mvebu: allow additional 4096 offset for bootable mmc image Disarm the error message forcing u-boot/spl image to be located at sector 0 on eMMC data-partition and microSD. Offset 0 makes sense on eMMC boot partitions only, data partition must use 4096 to avoid conflicting with MBR. Valid offsets when booting from microSD, reported by boot-rom v1.73: BootROM: Bad header at offset 00000200 BootROM: Bad header at offset 00004400 BootROM: Bad header at offset 00200000 BootROM: Bad header at offset 00400000 BootROM: Bad header at offset 00600000 BootROM: Bad header at offset 00800000 BootROM: Bad header at offset 00A00000 BootROM: Bad header at offset 00C00000 BootROM: Bad header at offset 00E00000 BootROM: Bad header at offset 01000000 BootROM: Bad header at offset 01200000 BootROM: Bad header at offset 01400000 BootROM: Bad header at offset 01600000 BootROM: Bad header at offset 01800000 BootROM: Bad header at offset 01A00000 BootROM: Bad header at offset 01C00000 BootROM: Bad header at offset 01E00000 BootROM: Bad header at offset 02000000 BootROM: Bad header at offset 02200000 BootROM: Bad header at offset 02400000 BootROM: Bad header at offset 02600000 BootROM: Bad header at offset 02800000 BootROM: Bad header at offset 02A00000 BootROM: Bad header at offset 02C00000 BootROM: Bad header at offset 02E00000 Valid offsets when booting from eMMC: BootROM: Bad header at offset 00000000 BootROM: Bad header at offset 00200000 Switching BootPartitions. BootROM: Bad header at offset 00000000 BootROM: Bad header at offset 00200000 Fixes: 2226ca17348 ("arm: mvebu: Load U-Boot proper binary in SPL code based on kwbimage header") Signed-off-by: Josua Mayer Reviewed-by: Stefan Roese --- arch/arm/mach-mvebu/spl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c index eaaa68a8564..79f8877745b 100644 --- a/arch/arm/mach-mvebu/spl.c +++ b/arch/arm/mach-mvebu/spl.c @@ -71,8 +71,9 @@ #error CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR must be set to 0 #endif #if !defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET) || \ - CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET != 0 -#error CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET must be set to 0 + (CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET != 0 && \ + CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET != 4096) +#error CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET must be set to either 0 or 4096 #endif #endif -- cgit v1.2.3 From 3a80ec0a276bac604d8a38188139e9a557b85c79 Mon Sep 17 00:00:00 2001 From: Josua Mayer Date: Wed, 25 Oct 2023 10:22:54 +0200 Subject: cmd: mvebu/bubt: move eMMC data-partition uboot from LBA-0 to 4096 A38x bootrom only searches 2 sectors when booting from eMMC, irregardless of data or boot partition: 0 & 4096. For eMMC boot partitions sector 0 is fine, but on data partition it conflicts with MBR. Change bubt command default to 4096 for eMMC data partition only, to allow using an MBR partition table on the eMMC data partition while also booting from it. Signed-off-by: Josua Mayer Reviewed-by: Stefan Roese --- cmd/mvebu/bubt.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/cmd/mvebu/bubt.c b/cmd/mvebu/bubt.c index ca24a5c1c4b..744b1c20aa8 100644 --- a/cmd/mvebu/bubt.c +++ b/cmd/mvebu/bubt.c @@ -240,9 +240,16 @@ static int mmc_burn_image(size_t image_size) #endif /* SD reserves LBA-0 for MBR and boots from LBA-1, - * MMC/eMMC boots from LBA-0 + * MMC/eMMC boots from LBA-0 and LBA-4096 */ - start_lba = IS_SD(mmc) ? 1 : 0; + if (IS_SD(mmc)) + start_lba = 1; +#ifdef CONFIG_SUPPORT_EMMC_BOOT + else if (part) + start_lba = 0; +#endif + else + start_lba = 4096; #ifdef CONFIG_BLK blk_count = image_size / mmc->write_bl_len; if (image_size % mmc->write_bl_len) -- cgit v1.2.3 From b6014f209f15bd49dd4ceb987d3a52e99b0305d4 Mon Sep 17 00:00:00 2001 From: Tony Dinh Date: Wed, 25 Oct 2023 15:38:37 -0700 Subject: arm: kirkwood: Enable bootstd for Zyxel NSA310S board Enable bootstd for Zyxel NSA310S board, and remove distroboot. Signed-off-by: Tony Dinh Reviewed-by: Stefan Roese --- configs/nsa310s_defconfig | 3 ++- include/configs/nsa310s.h | 17 ++--------------- 2 files changed, 4 insertions(+), 16 deletions(-) diff --git a/configs/nsa310s_defconfig b/configs/nsa310s_defconfig index ff4895622cb..038ef42e9d8 100644 --- a/configs/nsa310s_defconfig +++ b/configs/nsa310s_defconfig @@ -19,7 +19,8 @@ CONFIG_DEBUG_UART_CLOCK=166666667 CONFIG_IDENT_STRING="\nZyXEL NSA310S/320S 1/2-Bay Power Media Server" CONFIG_SYS_LOAD_ADDR=0x800000 CONFIG_DEBUG_UART=y -CONFIG_DISTRO_DEFAULTS=y +CONFIG_BOOTSTD_FULL=y +CONFIG_BOOTSTD_DEFAULTS=y CONFIG_BOOTDELAY=3 CONFIG_USE_PREBOOT=y # CONFIG_DISPLAY_BOARDINFO is not set diff --git a/include/configs/nsa310s.h b/include/configs/nsa310s.h index fa029a176bd..8c4d03553d3 100644 --- a/include/configs/nsa310s.h +++ b/include/configs/nsa310s.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0+ */ /* - * Copyright (C) 2015, 2021-2022 Tony Dinh + * Copyright (C) 2015, 2021-2023 Tony Dinh * Copyright (C) 2015 * Gerald Kerma * Luka Perkov @@ -15,14 +15,6 @@ */ #include "mv-common.h" -/* Include the common distro boot environment */ -#ifndef CONFIG_SPL_BUILD - -#define BOOT_TARGET_DEVICES(func) \ - func(USB, usb, 0) \ - func(SATA, sata, 0) \ - func(DHCP, dhcp, na) - #define KERNEL_ADDR_R __stringify(0x800000) #define FDT_ADDR_R __stringify(0x2c00000) #define RAMDISK_ADDR_R __stringify(0x01100000) @@ -34,16 +26,11 @@ "ramdisk_addr_r=" RAMDISK_ADDR_R "\0" \ "scriptaddr=" SCRIPT_ADDR_R "\0" -#include - #define CFG_EXTRA_ENV_SETTINGS \ "console=console=ttyS0,115200\0" \ "kernel=/boot/zImage\0" \ "fdt=/boot/nsa310s.dtb\0" \ "bootargs_root=ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs rw\0" \ - LOAD_ADDRESS_ENV_SETTINGS \ - BOOTENV - -#endif /* CONFIG_SPL_BUILD */ + LOAD_ADDRESS_ENV_SETTINGS #endif /* _CONFIG_NSA310S_H */ -- cgit v1.2.3