config TARGET_ATSTK1002
bool "Support atstk1002"
-config TARGET_ATSTK1003
- bool "Support atstk1003"
-
-config TARGET_ATSTK1004
- bool "Support atstk1004"
-
-config TARGET_ATSTK1006
- bool "Support atstk1006"
-
config TARGET_GRASSHOPPER
bool "Support grasshopper"
default "atstk1002"
endif
-
-if TARGET_ATSTK1003
-
-config SYS_BOARD
- default "atstk1000"
-
-config SYS_VENDOR
- default "atmel"
-
-config SYS_SOC
- default "at32ap700x"
-
-config SYS_CONFIG_NAME
- default "atstk1003"
-
-endif
-
-if TARGET_ATSTK1004
-
-config SYS_BOARD
- default "atstk1000"
-
-config SYS_VENDOR
- default "atmel"
-
-config SYS_SOC
- default "at32ap700x"
-
-config SYS_CONFIG_NAME
- default "atstk1004"
-
-endif
-
-if TARGET_ATSTK1006
-
-config SYS_BOARD
- default "atstk1000"
-
-config SYS_VENDOR
- default "atmel"
-
-config SYS_SOC
- default "at32ap700x"
-
-config SYS_CONFIG_NAME
- default "atstk1006"
-
-endif
F: board/atmel/atstk1000/
F: include/configs/atstk1002.h
F: configs/atstk1002_defconfig
-F: include/configs/atstk1003.h
-F: configs/atstk1003_defconfig
-F: include/configs/atstk1004.h
-F: configs/atstk1004_defconfig
-F: include/configs/atstk1006.h
-F: configs/atstk1006_defconfig
};
static const struct sdram_config sdram_config = {
-#if defined(CONFIG_ATSTK1006)
- /* Dual MT48LC16M16A2-7E (64 MB) on daughterboard */
.data_bits = SDRAM_DATA_32BIT,
- .row_bits = 13,
- .col_bits = 9,
- .bank_bits = 2,
- .cas = 2,
- .twr = 2,
- .trc = 7,
- .trp = 2,
- .trcd = 2,
- .tras = 4,
- .txsr = 7,
- /* 7.81 us */
- .refresh_period = (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
-#else
- /* MT48LC2M32B2P-5 (8 MB) on motherboard */
-#ifdef CONFIG_ATSTK1004
- .data_bits = SDRAM_DATA_16BIT,
-#else
- .data_bits = SDRAM_DATA_32BIT,
-#endif
#ifdef CONFIG_ATSTK1000_16MB_SDRAM
/* MT48LC4M32B2P-6 (16 MB) on mod'ed motherboard */
.row_bits = 12,
#else
+ /* MT48LC2M32B2P-5 (8 MB) on motherboard */
.row_bits = 11,
#endif
.col_bits = 8,
.txsr = 5,
/* 15.6 us */
.refresh_period = (156 * (SDRAMC_BUS_HZ / 1000)) / 10000,
-#endif
};
int board_early_init_f(void)
+++ /dev/null
-CONFIG_AVR32=y
-CONFIG_TARGET_ATSTK1003=y
-CONFIG_AUTOBOOT_KEYED=y
-CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
-CONFIG_AUTOBOOT_DELAY_STR="d"
-CONFIG_AUTOBOOT_STOP_STR=" "
+++ /dev/null
-CONFIG_AVR32=y
-CONFIG_TARGET_ATSTK1004=y
-CONFIG_AUTOBOOT_KEYED=y
-CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
-CONFIG_AUTOBOOT_DELAY_STR="d"
-CONFIG_AUTOBOOT_STOP_STR=" "
+++ /dev/null
-CONFIG_AVR32=y
-CONFIG_CMD_NET=y
-CONFIG_TARGET_ATSTK1006=y
-CONFIG_AUTOBOOT_KEYED=y
-CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
-CONFIG_AUTOBOOT_DELAY_STR="d"
-CONFIG_AUTOBOOT_STOP_STR=" "
+++ /dev/null
-/*
- * Copyright (C) 2007 Atmel Corporation
- *
- * Configuration settings for the ATSTK1003 CPU daughterboard
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-#ifndef __CONFIG_H
-#define __CONFIG_H
-
-#include <asm/arch/hardware.h>
-
-#define CONFIG_AT32AP
-#define CONFIG_AT32AP7001
-#define CONFIG_ATSTK1003
-#define CONFIG_ATSTK1000
-
-/*
- * Set up the PLL to run at 140 MHz, the CPU to run at the PLL
- * frequency, the HSB and PBB at 1/2, and the PBA to run at 1/4 the
- * PLL frequency.
- * (CONFIG_SYS_OSC0_HZ * CONFIG_SYS_PLL0_MUL) / CONFIG_SYS_PLL0_DIV = PLL MHz
- */
-#define CONFIG_PLL
-#define CONFIG_SYS_POWER_MANAGER
-#define CONFIG_SYS_OSC0_HZ 20000000
-#define CONFIG_SYS_PLL0_DIV 1
-#define CONFIG_SYS_PLL0_MUL 7
-#define CONFIG_SYS_PLL0_SUPPRESS_CYCLES 16
-/*
- * Set the CPU running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_CPU) = CPU MHz
- */
-#define CONFIG_SYS_CLKDIV_CPU 0
-/*
- * Set the HSB running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_HSB) = HSB MHz
- */
-#define CONFIG_SYS_CLKDIV_HSB 1
-/*
- * Set the PBA running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_PBA) = PBA MHz
- */
-#define CONFIG_SYS_CLKDIV_PBA 2
-/*
- * Set the PBB running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_PBB) = PBB MHz
- */
-#define CONFIG_SYS_CLKDIV_PBB 1
-
-/* Reserve VM regions for SDRAM and NOR flash */
-#define CONFIG_SYS_NR_VM_REGIONS 2
-
-/*
- * The PLLOPT register controls the PLL like this:
- * icp = PLLOPT<2>
- * ivco = PLLOPT<1:0>
- *
- * We want icp=1 (default) and ivco=0 (80-160 MHz) or ivco=2 (150-240MHz).
- */
-#define CONFIG_SYS_PLL0_OPT 0x04
-
-#define CONFIG_USART_BASE ATMEL_BASE_USART1
-#define CONFIG_USART_ID 1
-
-/* User serviceable stuff */
-#define CONFIG_DOS_PARTITION
-
-#define CONFIG_CMDLINE_TAG
-#define CONFIG_SETUP_MEMORY_TAGS
-#define CONFIG_INITRD_TAG
-
-#define CONFIG_STACKSIZE (2048)
-
-#define CONFIG_BAUDRATE 115200
-#define CONFIG_BOOTARGS \
- "console=ttyS0 root=/dev/mmcblk0p1 rootwait"
-
-#define CONFIG_BOOTCOMMAND \
- "mmc rescan; ext2load mmc 0:1 0x10400000 /boot/uImage; bootm"
-
-#define CONFIG_BOOTDELAY 1
-
-/*
- * Command line configuration.
- */
-#include <config_cmd_default.h>
-
-#define CONFIG_CMD_ASKENV
-#define CONFIG_CMD_EXT2
-#define CONFIG_CMD_FAT
-#define CONFIG_CMD_JFFS2
-#define CONFIG_CMD_MMC
-
-#undef CONFIG_CMD_FPGA
-#undef CONFIG_CMD_NFS
-#undef CONFIG_CMD_SETGETDCR
-#undef CONFIG_CMD_XIMG
-
-#define CONFIG_ATMEL_USART
-#define CONFIG_PORTMUX_PIO
-#define CONFIG_SYS_HSDRAMC
-#define CONFIG_MMC
-#define CONFIG_GENERIC_ATMEL_MCI
-#define CONFIG_GENERIC_MMC
-
-#define CONFIG_SYS_DCACHE_LINESZ 32
-#define CONFIG_SYS_ICACHE_LINESZ 32
-
-#define CONFIG_NR_DRAM_BANKS 1
-
-#define CONFIG_SYS_FLASH_CFI
-#define CONFIG_FLASH_CFI_DRIVER
-
-#define CONFIG_SYS_FLASH_BASE 0x00000000
-#define CONFIG_SYS_FLASH_SIZE 0x800000
-#define CONFIG_SYS_MAX_FLASH_BANKS 1
-#define CONFIG_SYS_MAX_FLASH_SECT 135
-
-#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_FLASH_BASE
-#define CONFIG_SYS_TEXT_BASE 0x00000000
-
-#define CONFIG_SYS_INTRAM_BASE INTERNAL_SRAM_BASE
-#define CONFIG_SYS_INTRAM_SIZE INTERNAL_SRAM_SIZE
-#define CONFIG_SYS_SDRAM_BASE EBI_SDRAM_BASE
-
-#define CONFIG_ENV_IS_IN_FLASH
-#define CONFIG_ENV_SIZE 65536
-#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - CONFIG_ENV_SIZE)
-
-#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INTRAM_BASE + CONFIG_SYS_INTRAM_SIZE)
-
-#define CONFIG_SYS_MALLOC_LEN (256*1024)
-
-/* Allow 4MB for the kernel run-time image */
-#define CONFIG_SYS_LOAD_ADDR (EBI_SDRAM_BASE + 0x00400000)
-#define CONFIG_SYS_BOOTPARAMS_LEN (16 * 1024)
-
-/* Other configuration settings that shouldn't have to change all that often */
-#define CONFIG_SYS_PROMPT "U-Boot> "
-#define CONFIG_SYS_CBSIZE 256
-#define CONFIG_SYS_MAXARGS 16
-#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
-#define CONFIG_SYS_LONGHELP
-
-#define CONFIG_SYS_MEMTEST_START EBI_SDRAM_BASE
-#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_MEMTEST_START + 0x700000)
-#define CONFIG_SYS_BAUDRATE_TABLE { 115200, 38400, 19200, 9600, 2400 }
-
-#endif /* __CONFIG_H */
+++ /dev/null
-/*
- * Copyright (C) 2007 Atmel Corporation
- *
- * Configuration settings for the ATSTK1003 CPU daughterboard
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-#ifndef __CONFIG_H
-#define __CONFIG_H
-
-#include <asm/arch/hardware.h>
-
-#define CONFIG_AT32AP
-#define CONFIG_AT32AP7002
-#define CONFIG_ATSTK1004
-#define CONFIG_ATSTK1000
-
-/*
- * Set up the PLL to run at 140 MHz, the CPU to run at the PLL
- * frequency, the HSB and PBB at 1/2, and the PBA to run at 1/4 the
- * PLL frequency.
- * (CONFIG_SYS_OSC0_HZ * CONFIG_SYS_PLL0_MUL) / CONFIG_SYS_PLL0_DIV = PLL MHz
- */
-#define CONFIG_PLL
-#define CONFIG_SYS_POWER_MANAGER
-#define CONFIG_SYS_OSC0_HZ 20000000
-#define CONFIG_SYS_PLL0_DIV 1
-#define CONFIG_SYS_PLL0_MUL 7
-#define CONFIG_SYS_PLL0_SUPPRESS_CYCLES 16
-/*
- * Set the CPU running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_CPU) = CPU MHz
- */
-#define CONFIG_SYS_CLKDIV_CPU 0
-/*
- * Set the HSB running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_HSB) = HSB MHz
- */
-#define CONFIG_SYS_CLKDIV_HSB 1
-/*
- * Set the PBA running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_PBA) = PBA MHz
- */
-#define CONFIG_SYS_CLKDIV_PBA 2
-/*
- * Set the PBB running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_PBB) = PBB MHz
- */
-#define CONFIG_SYS_CLKDIV_PBB 1
-
-/* Reserve VM regions for SDRAM and NOR flash */
-#define CONFIG_SYS_NR_VM_REGIONS 2
-
-/*
- * The PLLOPT register controls the PLL like this:
- * icp = PLLOPT<2>
- * ivco = PLLOPT<1:0>
- *
- * We want icp=1 (default) and ivco=0 (80-160 MHz) or ivco=2 (150-240MHz).
- */
-#define CONFIG_SYS_PLL0_OPT 0x04
-
-#define CONFIG_USART_BASE ATMEL_BASE_USART1
-#define CONFIG_USART_ID 1
-
-/* User serviceable stuff */
-#define CONFIG_DOS_PARTITION
-
-#define CONFIG_CMDLINE_TAG
-#define CONFIG_SETUP_MEMORY_TAGS
-#define CONFIG_INITRD_TAG
-
-#define CONFIG_STACKSIZE (2048)
-
-#define CONFIG_BAUDRATE 115200
-#define CONFIG_BOOTARGS \
- "console=ttyS0 root=/dev/mmcblk0p1 rootwait"
-
-#define CONFIG_BOOTCOMMAND \
- "mmc rescan; ext2load mmc 0:1 0x10200000 /boot/uImage; bootm"
-
-#define CONFIG_BOOTDELAY 1
-
-/*
- * Command line configuration.
- */
-#include <config_cmd_default.h>
-
-#define CONFIG_CMD_ASKENV
-#define CONFIG_CMD_EXT2
-#define CONFIG_CMD_FAT
-#define CONFIG_CMD_JFFS2
-#define CONFIG_CMD_MMC
-
-#undef CONFIG_CMD_FPGA
-#undef CONFIG_CMD_NFS
-#undef CONFIG_CMD_SETGETDCR
-#undef CONFIG_CMD_XIMG
-
-#define CONFIG_ATMEL_USART
-#define CONFIG_PORTMUX_PIO
-#define CONFIG_SYS_HSDRAMC
-#define CONFIG_MMC
-#define CONFIG_GENERIC_ATMEL_MCI
-#define CONFIG_GENERIC_MMC
-
-#define CONFIG_SYS_DCACHE_LINESZ 32
-#define CONFIG_SYS_ICACHE_LINESZ 32
-
-#define CONFIG_NR_DRAM_BANKS 1
-
-#define CONFIG_SYS_FLASH_CFI
-#define CONFIG_FLASH_CFI_DRIVER
-
-#define CONFIG_SYS_FLASH_BASE 0x00000000
-#define CONFIG_SYS_FLASH_SIZE 0x800000
-#define CONFIG_SYS_MAX_FLASH_BANKS 1
-#define CONFIG_SYS_MAX_FLASH_SECT 135
-
-#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_FLASH_BASE
-#define CONFIG_SYS_TEXT_BASE 0x00000000
-
-#define CONFIG_SYS_INTRAM_BASE INTERNAL_SRAM_BASE
-#define CONFIG_SYS_INTRAM_SIZE INTERNAL_SRAM_SIZE
-#define CONFIG_SYS_SDRAM_BASE EBI_SDRAM_BASE
-
-#define CONFIG_ENV_IS_IN_FLASH
-#define CONFIG_ENV_SIZE 65536
-#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - CONFIG_ENV_SIZE)
-
-#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INTRAM_BASE + CONFIG_SYS_INTRAM_SIZE)
-
-#define CONFIG_SYS_MALLOC_LEN (256*1024)
-
-/* Allow 2MB for the kernel run-time image */
-#define CONFIG_SYS_LOAD_ADDR (EBI_SDRAM_BASE + 0x00200000)
-#define CONFIG_SYS_BOOTPARAMS_LEN (16 * 1024)
-
-/* Other configuration settings that shouldn't have to change all that often */
-#define CONFIG_SYS_PROMPT "U-Boot> "
-#define CONFIG_SYS_CBSIZE 256
-#define CONFIG_SYS_MAXARGS 16
-#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
-#define CONFIG_SYS_LONGHELP
-
-#define CONFIG_SYS_MEMTEST_START EBI_SDRAM_BASE
-#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_MEMTEST_START + 0x700000)
-#define CONFIG_SYS_BAUDRATE_TABLE { 115200, 38400, 19200, 9600, 2400 }
-
-#endif /* __CONFIG_H */
+++ /dev/null
-/*
- * Copyright (C) 2005-2006 Atmel Corporation
- *
- * Configuration settings for the ATSTK1002 CPU daughterboard
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-#ifndef __CONFIG_H
-#define __CONFIG_H
-
-#include <asm/arch/hardware.h>
-
-#define CONFIG_AT32AP
-#define CONFIG_AT32AP7000
-#define CONFIG_ATSTK1006
-#define CONFIG_ATSTK1000
-
-
-/*
- * Set up the PLL to run at 140 MHz, the CPU to run at the PLL
- * frequency, the HSB and PBB at 1/2, and the PBA to run at 1/4 the
- * PLL frequency.
- * (CONFIG_SYS_OSC0_HZ * CONFIG_SYS_PLL0_MUL) / CONFIG_SYS_PLL0_DIV = PLL MHz
- */
-#define CONFIG_PLL
-#define CONFIG_SYS_POWER_MANAGER
-#define CONFIG_SYS_OSC0_HZ 20000000
-#define CONFIG_SYS_PLL0_DIV 1
-#define CONFIG_SYS_PLL0_MUL 7
-#define CONFIG_SYS_PLL0_SUPPRESS_CYCLES 16
-/*
- * Set the CPU running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_CPU) = CPU MHz
- */
-#define CONFIG_SYS_CLKDIV_CPU 0
-/*
- * Set the HSB running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_HSB) = HSB MHz
- */
-#define CONFIG_SYS_CLKDIV_HSB 1
-/*
- * Set the PBA running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_PBA) = PBA MHz
- */
-#define CONFIG_SYS_CLKDIV_PBA 2
-/*
- * Set the PBB running at:
- * PLL / (2^CONFIG_SYS_CLKDIV_PBB) = PBB MHz
- */
-#define CONFIG_SYS_CLKDIV_PBB 1
-
-/* Reserve VM regions for SDRAM and NOR flash */
-#define CONFIG_SYS_NR_VM_REGIONS 2
-
-/*
- * The PLLOPT register controls the PLL like this:
- * icp = PLLOPT<2>
- * ivco = PLLOPT<1:0>
- *
- * We want icp=1 (default) and ivco=0 (80-160 MHz) or ivco=2 (150-240MHz).
- */
-#define CONFIG_SYS_PLL0_OPT 0x04
-
-#define CONFIG_USART_BASE ATMEL_BASE_USART1
-#define CONFIG_USART_ID 1
-
-/* User serviceable stuff */
-#define CONFIG_DOS_PARTITION
-
-#define CONFIG_CMDLINE_TAG
-#define CONFIG_SETUP_MEMORY_TAGS
-#define CONFIG_INITRD_TAG
-
-#define CONFIG_STACKSIZE (2048)
-
-#define CONFIG_BAUDRATE 115200
-#define CONFIG_BOOTARGS \
- "console=ttyS0 root=mtd3 fbmem=2400k"
-
-#define CONFIG_BOOTCOMMAND \
- "fsload; bootm $(fileaddr)"
-
-#define CONFIG_BOOTDELAY 1
-
-/*
- * After booting the board for the first time, new ethernet addresses
- * should be generated and assigned to the environment variables
- * "ethaddr" and "eth1addr". This is normally done during production.
- */
-#define CONFIG_OVERWRITE_ETHADDR_ONCE
-
-/*
- * BOOTP options
- */
-#define CONFIG_BOOTP_SUBNETMASK
-#define CONFIG_BOOTP_GATEWAY
-
-
-/*
- * Command line configuration.
- */
-#include <config_cmd_default.h>
-
-#define CONFIG_CMD_ASKENV
-#define CONFIG_CMD_DHCP
-#define CONFIG_CMD_EXT2
-#define CONFIG_CMD_FAT
-#define CONFIG_CMD_JFFS2
-#define CONFIG_CMD_MMC
-
-#undef CONFIG_CMD_FPGA
-#undef CONFIG_CMD_SETGETDCR
-#undef CONFIG_CMD_SOURCE
-#undef CONFIG_CMD_XIMG
-
-#define CONFIG_ATMEL_USART
-#define CONFIG_MACB
-#define CONFIG_PORTMUX_PIO
-#define CONFIG_SYS_NR_PIOS 5
-#define CONFIG_SYS_HSDRAMC
-#define CONFIG_MMC
-#define CONFIG_GENERIC_ATMEL_MCI
-#define CONFIG_GENERIC_MMC
-
-#define CONFIG_SYS_DCACHE_LINESZ 32
-#define CONFIG_SYS_ICACHE_LINESZ 32
-
-#define CONFIG_NR_DRAM_BANKS 1
-
-#define CONFIG_SYS_FLASH_CFI
-#define CONFIG_FLASH_CFI_DRIVER
-
-#define CONFIG_SYS_FLASH_BASE 0x00000000
-#define CONFIG_SYS_FLASH_SIZE 0x800000
-#define CONFIG_SYS_MAX_FLASH_BANKS 1
-#define CONFIG_SYS_MAX_FLASH_SECT 135
-
-#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_FLASH_BASE
-#define CONFIG_SYS_TEXT_BASE 0x00000000
-
-#define CONFIG_SYS_INTRAM_BASE INTERNAL_SRAM_BASE
-#define CONFIG_SYS_INTRAM_SIZE INTERNAL_SRAM_SIZE
-#define CONFIG_SYS_SDRAM_BASE EBI_SDRAM_BASE
-
-#define CONFIG_ENV_IS_IN_FLASH
-#define CONFIG_ENV_SIZE 65536
-#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - CONFIG_ENV_SIZE)
-
-#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INTRAM_BASE + CONFIG_SYS_INTRAM_SIZE)
-
-#define CONFIG_SYS_MALLOC_LEN (256*1024)
-
-/* Allow 4MB for the kernel run-time image */
-#define CONFIG_SYS_LOAD_ADDR (EBI_SDRAM_BASE + 0x00400000)
-#define CONFIG_SYS_BOOTPARAMS_LEN (16 * 1024)
-
-/* Other configuration settings that shouldn't have to change all that often */
-#define CONFIG_SYS_PROMPT "U-Boot> "
-#define CONFIG_SYS_CBSIZE 256
-#define CONFIG_SYS_MAXARGS 16
-#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
-#define CONFIG_SYS_LONGHELP
-
-#define CONFIG_SYS_MEMTEST_START EBI_SDRAM_BASE
-#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_MEMTEST_START + 0x3f00000)
-#define CONFIG_SYS_BAUDRATE_TABLE { 115200, 38400, 19200, 9600, 2400 }
-
-#endif /* __CONFIG_H */
projects / karo-tx-uboot.git / commitdiff