From patchwork Wed Jan 22 23:15:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Nemirovsky X-Patchwork-Id: 239942 List-Id: U-Boot discussion From: Alex.Nemirovsky at cortina-access.com (Alex Nemirovsky) Date: Wed, 22 Jan 2020 23:15:38 +0000 Subject: [PATCH v2 7/7] board: presidio-asic: Add basic G3 engr. development board support In-Reply-To: References: <1579601912-27737-1-git-send-email-alex.nemirovsky@cortina-access.com> <1579601912-27737-8-git-send-email-alex.nemirovsky@cortina-access.com> Message-ID: <00D34A3E-2CCE-4E2C-8144-784276D23172@cortina-access.com> Hi Daniel, Thanks for your feedback and guidance. I grok all except the recommendation about migrating out the definition of GICD_BASE and GIDCC_BASE. your comment was: +/* Generic Interrupt Controller Definitions */ +#define GICD_BASE 0xf7011000 +#define GICC_BASE 0xf7012000 don't put register addresses in the config file. Those should come from device-tree anyway. The config file should only set the legacy config options which aren't yet migrated to Kconfig. If you need that in low-level code or so, put the defines there or create a small header file However, I think this may be wider concern than just our new ARMv8 board submission. ARMv8 core components such as: arch/arm/lib/gic_64.S arch/arm/cpu/armv8/start.S reference these ARM GIC symbols without going through DT. As a result, many boards define them in their configs/board.h files. Perhaps this needs to be solved at a later time in bulk for all ARMv8 boards? see below: uboot at 78d4bae197f9:/build$ find . -type f -exec grep -H GICC_BASE {} \; ./board/cortina/common/armv8/lowlevel_init.S: ldr x1, =GICC_BASE ./board/cortina/common/armv8/lowlevel_init.S: ldr x0, =GICC_BASE ./include/configs/rcar-gen3-common.h:#define GICC_BASE 0xF1020000 ./include/configs/px30_common.h:#define GICC_BASE 0xff132000 ./include/configs/vexpress_aemv8a.h:#define GICC_BASE (0x2c000000) ./include/configs/vexpress_aemv8a.h:#define GICC_BASE (0x2C02f000) ./include/configs/meson64.h:#define GICC_BASE 0xffc02000 ./include/configs/meson64.h:#define GICC_BASE 0xc4302000 ./include/configs/s32v234evb.h:#define GICC_BASE 0x7D002000 ./include/configs/hikey960.h:#define GICC_BASE 0xe82b2000 ./include/configs/hikey.h:#define GICC_BASE 0xf6802000 ./include/configs/sun50i.h:#define GICC_BASE 0x1c82000 ./include/configs/sun50i.h:#define GICC_BASE 0x3022000 ./include/configs/xilinx_zynqmp.h:#define GICC_BASE 0xF9020000 ./arch/arm/include/asm/arch-tegra210/tegra.h:#define GICC_BASE 0x50042000 /* Generic Int Cntrlr CPU I/F */ ./arch/arm/include/asm/arch-fsl-layerscape/config.h:#define GICC_BASE 0x01402000 ./arch/arm/include/asm/arch-fsl-layerscape/config.h:#define GICC_BASE_64K 0x01420000 ./arch/arm/include/asm/arch-fsl-layerscape/config.h:#define GICC_BASE 0x01402000 ./arch/arm/include/asm/arch-fsl-layerscape/config.h:#define GICC_BASE 0x01420000 ./arch/arm/include/asm/arch-tegra186/tegra.h:#define GICC_BASE 0x03882000 /* Generic Int Cntrlr CPU I/F */ ./arch/arm/lib/gic_64.S: ldr x1, =GICC_BASE /* GICC_CTLR */ ./arch/arm/mach-snapdragon/include/mach/sysmap-apq8016.h:#define GICC_BASE (0x0a20c000) ./arch/arm/mach-socfpga/include/mach/base_addr_s10.h:#define GICC_BASE 0xfffc2000 ./arch/arm/cpu/armv7/sunxi/psci.c:#define GICC_BASE (SUNXI_GIC400_BASE + GIC_CPU_OFFSET_A15) ./arch/arm/cpu/armv7/sunxi/psci.c: reg = readl(GICC_BASE + GICC_IAR); ./arch/arm/cpu/armv7/sunxi/psci.c: writel(reg, GICC_BASE + GICC_EOIR); ./arch/arm/cpu/armv7/sunxi/psci.c: writel(0xff, GICC_BASE + GICC_PMR); ./arch/arm/cpu/armv7/sunxi/psci.c: setbits_le32(GICC_BASE + GICC_CTLR, BIT(3)); ./arch/arm/cpu/armv8/start.S: ldr x1, =GICC_BASE ./arch/arm/cpu/armv8/start.S: ldr x0, =GICC_BASE ./arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S: ldr x1, =GICC_BASE ./arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S: ldr x1, =GICC_BASE_64K ./arch/arm/cpu/armv8/fsl-layerscape/fdt.c: reg[2] = cpu_to_fdt64(GICC_BASE_64K); ./arch/arm/cpu/armv8/fsl-layerscape/fdt.c: reg[2] = cpu_to_fdt64(GICC_BASE); ./arch/arm/cpu/armv8/start.S.orig: ldr x1, =GICC_BASE ./arch/arm/cpu/armv8/start.S.orig: ldr x0, =GICC_BASE ./arch/arm/mach-rmobile/lowlevel_init_gen3.S: ldr x1, =GICC_BASE ./arch/arm/mach-rmobile/lowlevel_init_gen3.S: ldr x0, =GICC_BASE On Jan 22, 2020, at 1:24 PM, Daniel Schwierzeck > wrote: Am 21.01.20 um 11:19 schrieb Alex Nemirovsky: Add basic Presidio G3 engineering board support Signed-off-by: Alex Nemirovsky > --- Changes in v2: None arch/arm/Kconfig | 5 ++ arch/arm/dts/Makefile | 2 + arch/arm/dts/ca-presidio-engboard.dts | 69 +++++++++++++++ board/cortina/common/armv8/ca7774_regs.h | 18 ++++ board/cortina/presidio-asic/Kconfig | 20 +++++ board/cortina/presidio-asic/MAINTAINERS | 6 ++ board/cortina/presidio-asic/Makefile | 8 ++ board/cortina/presidio-asic/presidio.c | 126 +++++++++++++++++++++++++++ configs/cortina_presidio-asic-base_defconfig | 45 ++++++++++ include/configs/presidio_asic.h | 123 ++++++++++++++++++++++++++ 10 files changed, 422 insertions(+) create mode 100644 arch/arm/dts/ca-presidio-engboard.dts create mode 100644 board/cortina/common/armv8/ca7774_regs.h create mode 100644 board/cortina/presidio-asic/Kconfig create mode 100644 board/cortina/presidio-asic/MAINTAINERS create mode 100644 board/cortina/presidio-asic/Makefile create mode 100644 board/cortina/presidio-asic/presidio.c create mode 100644 configs/cortina_presidio-asic-base_defconfig create mode 100644 include/configs/presidio_asic.h +#define CONFIG_EXTRA_ENV_SETTINGS "silent=y\0" +#define CONFIG_BOOTARGS "earlycon=serial,0xf4329148 console=ttyS0,115200 root=/dev/ram0" + +/* Monitor Command Prompt */ + +/* Console I/O Buffer Size */ +#define CONFIG_SYS_CBSIZE 256 +#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \ + sizeof(CONFIG_SYS_PROMPT) + 16) +#define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE + +/* max command args */ +#define CONFIG_SYS_MAXARGS 64 + +#endif /* __PRESIDIO_ASIC_H */ -- - Daniel diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 36c9c2f..6d95cde 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1638,6 +1638,10 @@ config TARGET_DURIAN Support for durian platform. It has 2GB Sdram, uart and pcie. +config TARGET_PRESIDIO_ASIC + bool "Support Cortina Presidio ASIC Platform" + select ARM64 + endchoice config ARCH_SUPPORT_TFABOOT @@ -1782,6 +1786,7 @@ source "board/Marvell/gplugd/Kconfig" source "board/armadeus/apf27/Kconfig" source "board/armltd/vexpress/Kconfig" source "board/armltd/vexpress64/Kconfig" +source "board/cortina/presidio-asic/Kconfig" source "board/broadcom/bcm23550_w1d/Kconfig" source "board/broadcom/bcm28155_ap/Kconfig" source "board/broadcom/bcm963158/Kconfig" diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile index 0127a91..81db1e6 100644 --- a/arch/arm/dts/Makefile +++ b/arch/arm/dts/Makefile @@ -849,6 +849,8 @@ dtb-$(CONFIG_TARGET_VEXPRESS_CA15_TC2) += vexpress-v2p-ca15_a7.dtb dtb-$(CONFIG_TARGET_DURIAN) += phytium-durian.dtb +dtb-$(CONFIG_TARGET_PRESIDIO_ASIC) += ca-presidio-engboard.dtb + targets += $(dtb-y) # Add any required device tree compiler flags here diff --git a/arch/arm/dts/ca-presidio-engboard.dts b/arch/arm/dts/ca-presidio-engboard.dts new file mode 100644 index 0000000..ef371b0 --- /dev/null +++ b/arch/arm/dts/ca-presidio-engboard.dts @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020, Cortina Access Inc. + */ + +/dts-v1/; + +/ { + #address-cells = <2>; + #size-cells = <1>; + + mmc0: mmc at f4400000 { + compatible = "snps,dw-cortina"; + reg = <0x0 0xf4400000 0x1000>; + bus-width = <4>; + io_ds = <0x77>; + fifo-mode; + sd_dll_ctrl = <0xf43200e8>; + io_drv_ctrl = <0xf432004c>; + }; + + gpio0: gpio-controller at 0xf4329280 { + compatible = "cortina,ca-gpio"; + reg = <0x0 0xf4329280 0x24>; + gpio-controller; + #gpio-cells = <2>; + status = "okay"; + }; + gpio1: gpio-controller at 0xf43292a4 { + compatible = "cortina,ca-gpio"; + reg = <0x0 0xf43292a4 0x24>; + gpio-controller; + #gpio-cells = <2>; + status = "disabled"; + }; + + watchdog: watchdog at 0xf432901c { + compatible = "cortina,ca-wdt"; + reg = <0x0 0xf432901c 0x34>, + <0x0 0xf4320020 0x04>; + status = "okay"; + }; + + uart0: serial at 0xf4329148 { + u-boot,dm-pre-reloc; + compatible = "cortina,ca-uart"; + reg = <0x0 0xf4329148 0x30>; + status = "okay"; + }; + + i2c: i2c at f4329120 { + compatible = "cortina,ca-i2c"; + reg = <0x0 0xf4329120 0x28>; + clock-frequency = <400000>; + }; + + sflash: sflash-controller at f4324000 { + #address-cells = <2>; + #size-cells = <1>; + compatible = "cortina,ca-sflash"; + reg = <0x0 0xf4324000 0x50>; + reg-names = "sflash-regs"; + flash at 0 { + compatible = "jedec,spi-nor"; + spi-rx-bus-width = <1>; + spi-max-frequency = <108000000>; + }; closing bracket is incorrectly indented + }; +}; diff --git a/board/cortina/common/armv8/ca7774_regs.h b/board/cortina/common/armv8/ca7774_regs.h new file mode 100644 index 0000000..d997155 --- /dev/null +++ b/board/cortina/common/armv8/ca7774_regs.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2015-2020, Cortina-Access Incorporation. + */ + +#ifndef _CA7774_H_ +#define _CA7774_H_ + +#define CA_PERIPH_BASE 0xE0000000UL +#define CA_PERIPH_SIZE 0x20000000UL +#define CA_GLOBAL_BASE 0xf4320000 +#define CA_GLOBAL_JTAG_ID 0xf4320000 +#define CA_GLOBAL_BLOCK_RESET 0xf4320004 +#define CA_GLOBAL_BLOCK_RESET_RESET_DMA BIT(16) +#define CA_DMA_SEC_SSP_BAUDRATE_CTRL 0xf7001b94 +#define CA_DMA_SEC_SSP_ID 0xf7001b80 + +#endif /* _CA7774_H_ */ diff --git a/board/cortina/presidio-asic/Kconfig b/board/cortina/presidio-asic/Kconfig new file mode 100644 index 0000000..8b3f3fd --- /dev/null +++ b/board/cortina/presidio-asic/Kconfig @@ -0,0 +1,20 @@ +if TARGET_PRESIDIO_ASIC +config BIT64 + bool + default y + +config CA77XX + bool + default y + +config SYS_BOARD + default "presidio-asic" + +config SYS_VENDOR + default "cortina" + +config SYS_CONFIG_NAME + default "presidio_asic" + +source "board/cortina/common/Kconfig" +endif diff --git a/board/cortina/presidio-asic/MAINTAINERS b/board/cortina/presidio-asic/MAINTAINERS new file mode 100644 index 0000000..9db17bd --- /dev/null +++ b/board/cortina/presidio-asic/MAINTAINERS @@ -0,0 +1,6 @@ +Cortina Presidio ASIC G3 Engineering BOARD +M: Alex Nemirovsky > +S: Supported +F: board/cortina/presidio-asic/ +F: include/configs/presidio_asic.h +F: configs/cortina_presidio-asic*defconfig diff --git a/board/cortina/presidio-asic/Makefile b/board/cortina/presidio-asic/Makefile new file mode 100644 index 0000000..33f8e7c --- /dev/null +++ b/board/cortina/presidio-asic/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# (C) Copyright 2020 Cortina-Access.Inc. +# +# + +obj-y := presidio.o +obj-y += ../common/armv8/lowlevel_init.o diff --git a/board/cortina/presidio-asic/presidio.c b/board/cortina/presidio-asic/presidio.c new file mode 100644 index 0000000..1bebe28 --- /dev/null +++ b/board/cortina/presidio-asic/presidio.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2020 - Cortina Access Inc. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "../common/armv8/ca7774_regs.h" + +DECLARE_GLOBAL_DATA_PTR; + +int print_cpuinfo(void) +{ + printf("CPU: Cortina Presidio G3\n"); + return 0; +} + +static struct mm_region presidio_mem_map[] = { + { + .virt = DDR_BASE, + .phys = DDR_BASE, + .size = PHYS_SDRAM_1_SIZE, + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | + PTE_BLOCK_OUTER_SHARE + }, + { + .virt = CA_PERIPH_BASE, + .phys = CA_PERIPH_BASE, + .size = CA_PERIPH_SIZE, + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | + PTE_BLOCK_NON_SHARE + }, + { + /* List terminator */ + 0, + } +}; + +struct mm_region *mem_map = presidio_mem_map; + +static noinline int invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1, + u64 arg2) +{ + asm volatile("mov x0, %0\n" + "mov x1, %1\n" + "mov x2, %2\n" + "mov x3, %3\n" + "smc #0\n" + : "+r" (function_id) + : "r" (arg0), "r" (arg1), "r" (arg2) + ); + + return function_id; +} + +int board_early_init_r(void) +{ + dcache_disable(); + return 0; +} + +int board_init(void) +{ + unsigned int reg_data, jtag_id; + + /* Enable timer */ + writel(1, CONFIG_SYS_TIMER_BASE); + + /* Enable snoop in CCI400 slave port#4 */ + writel(3, 0xF5595000); + + jtag_id = readl(CA_GLOBAL_JTAG_ID); + + /* If this is HGU variant then do not use + * the Saturn daughter card ref. clk + */ + if (jtag_id == 0x1010D8F3) { + reg_data = readl(0xF3100064); + /* change multifunc. REF CLK pin to + * a simple GPIO pin + */ + reg_data |= (1 << 1); + writel(reg_data, 0xf3100064); + } + + return 0; +} + +int dram_init(void) +{ + unsigned int ddr_size; + + ddr_size = readl(0x111100c); + gd->ram_size = ddr_size * 0x100000; + return 0; +} + +void reset_cpu(ulong addr) +{ + invoke_psci_fn_smc(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0); +} + +#ifdef CONFIG_LAST_STAGE_INIT +int last_stage_init(void) +{ + u32 val; + + val = readl(CA_GLOBAL_BLOCK_RESET); + val &= ~CA_GLOBAL_BLOCK_RESET_RESET_DMA; + writel(val, CA_GLOBAL_BLOCK_RESET); + + /* reduce output pclk ~3.7Hz to save power consumption */ + writel(0x000000FF, CA_DMA_SEC_SSP_BAUDRATE_CTRL); + + return 0; +} +#endif diff --git a/configs/cortina_presidio-asic-base_defconfig b/configs/cortina_presidio-asic-base_defconfig new file mode 100644 index 0000000..45b911c --- /dev/null +++ b/configs/cortina_presidio-asic-base_defconfig @@ -0,0 +1,45 @@ +# Cortina-Access Ltd. Presidio ASIC Board the defconfig file must not created manually, try this: make savedefconfig cp defconfig configs/cortina_presidio-asic-base_defconfig +CONFIG_CORTINA_PLATFORM=y +CONFIG_ARM=y +CONFIG_SYS_ARCH_TIMER=n +CONFIG_TARGET_PRESIDIO_ASIC=y +CONFIG_SHOW_BOOT_PROGRESS=y +CONFIG_BOARD_EARLY_INIT_R=y +CONFIG_ENV_OFFSET=0x400000 +CONFIG_ENV_SIZE=0x20000 +CONFIG_SYS_TEXT_BASE=0x04000000 +CONFIG_BOOTDELAY=3 +CONFIG_SYS_PROMPT="G3#" +CONFIG_NR_DRAM_BANKS=1 +CONFIG_CONS_INDEX=0 +CONFIG_IDENT_STRING="Presidio-SoC" +CONFIG_BOOTP_VCI_STRING="U-boot.armv8.presidio" +CONFIG_OF_LIBFDT=y + +CONFIG_MENU=y +CONFIG_CMD_CACHE=y +CONFIG_CMD_TIMER=y +CONFIG_CMD_SMC=y + +CONFIG_DM=y +CONFIG_CORTINA_UART=y +CONFIG_REQUIRE_SERIAL_CONSOLE=y +CONFIG_DM_SERIAL=y + +CONFIG_DM_GPIO=y +CONFIG_CORTINA_GPIO=y + +CONFIG_WATCHDOG=y +CONFIG_WATCHDOG_TIMEOUT_MSECS=60000 +CONFIG_WDT=y +CONFIG_WDT_CORTINA=y +CONFIG_CMD_WDT=y + +CONFIG_OF_CONTROL=y +CONFIG_OF_LIVE=y +CONFIG_OF_SEPARATE=y +CONFIG_DEFAULT_DEVICE_TREE="ca-presidio-engboard" + +CONFIG_MMC=n +CONFIG_NET=n +CONFIG_NETDEVICES=n diff --git a/include/configs/presidio_asic.h b/include/configs/presidio_asic.h new file mode 100644 index 0000000..d4f7888 --- /dev/null +++ b/include/configs/presidio_asic.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020 Cortina Access Inc. + * + * Configuration for Cortina-Access Presidio board. + */ + +#ifndef __PRESIDIO_ASIC_H +#define __PRESIDIO_ASIC_H + +#define CONFIG_BIT64 1 + +//#include remove dead code + +#define CA_REG_READ(addr) readl((u64)addr) +#define CA_REG_WRITE(value, addr) writel(value, (u64)addr) don't use custom I/O accessors + +#define CONFIG_CA77XX 1 new config options should be added in Kconfig + +#define CONFIG_REMAKE_ELF + +#define CONFIG_GICV2 + +#define CONFIG_SUPPORT_RAW_INITRD +#define CONFIG_ARMV8_MULTIENTRY + +/* SMP jump address in DRAM */ +#define CPU_RELEASE_ADDR 0x0740fff8 + +#define CONFIG_SYS_INIT_SP_ADDR 0x00100000 +#define CONFIG_SYS_BOOTM_LEN 0x00c00000 + +/* Generic Timer Definitions */ +#define COUNTER_FREQUENCY 25000000 +#define CONFIG_SYS_TIMER_RATE COUNTER_FREQUENCY +#define CONFIG_SYS_TIMER_COUNTER 0xf4321008 + +/* Generic Interrupt Controller Definitions */ +#define GICD_BASE 0xf7011000 +#define GICC_BASE 0xf7012000 don't put register addresses in the config file. Those should come from device-tree anyway. The config file should only set the legacy config options which aren't yet migrated to Kconfig. If you need that in low-level code or so, put the defines there or create a small header file + +#define CONFIG_SYS_MEMTEST_SCRATCH 0x00100000 +#define CONFIG_SYS_MEMTEST_START 0x05000000 +#define CONFIG_SYS_MEMTEST_END 0x0D000000 + +/* Size of malloc() pool */ +#define CONFIG_SYS_MALLOC_LEN (CONFIG_ENV_SIZE + (8 << 20)) + +#define CONFIG_SYS_TIMER_BASE 0xf4321000 + +/* Use external clock source */ +#define PRESIDIO_APB_CLK 125000000 +#define CORTINA_PER_IO_FREQ PRESIDIO_APB_CLK + +/* Cortina Serial Configuration */ +#define CORTINA_UART_CLOCK (PRESIDIO_APB_CLK) +#define CORTINA_SERIAL_PORTS {(void *)CONFIG_SYS_SERIAL0, \ + (void *)CONFIG_SYS_SERIAL1} + +#define CONFIG_BAUDRATE 115200 +#define CONFIG_SYS_SERIAL0 PER_UART0_CFG +#define CONFIG_SYS_SERIAL1 PER_UART1_CFG + +/* BLOCK Reset Definitions */ +#define RESET_OTPROM BIT(29) +#define RESET_SD BIT(28) +#define RESET_EAXI BIT(27) +#define RESET_FBM BIT(26) +#define RESET_LDMA BIT(25) +#define RESET_RCRYPTO BIT(24) +#define RESET_SADB BIT(22) +#define RESET_RCPU1 BIT(21) +#define RESET_RCPU0 BIT(20) +#define RESET_PE1 BIT(19) +#define RESET_PE0 BIT(18) +#define RESET_RTC BIT(17) +#define RESET_DMA BIT(16) +#define RESET_PER BIT(15) +#define RESET_FLASH BIT(14) +#define RESET_GIC400 BIT(10) +#define RESET_SATA BIT(9) +#define RESET_PCIE2 BIT(8) +#define RESET_PCIE1 BIT(7) +#define RESET_PCIE0 BIT(6) +#define RESET_TQM BIT(5) +#define RESET_SDRAM BIT(4) +#define RESET_L3FE BIT(3) +#define RESET_L2TM BIT(2) +#define RESET_L2FE BIT(1) +#define RESET_NI BIT(0) + +/* BOOTP options */ +#define CONFIG_BOOTP_BOOTFILESIZE + +/* Miscellaneous configurable options */ +#define DDR_BASE 0x00000000 +#define CONFIG_SYS_LOAD_ADDR (DDR_BASE + 0x10000000) +#define CONFIG_LAST_STAGE_INIT + +/* Physical Memory Map */ + +/* SDRAM Bank #1 */ +#define PHYS_SDRAM_1 DDR_BASE +#define PHYS_SDRAM_1_SIZE 0x80000000 /* 2GB */ +#define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM_1 + +/* Initial environment variables */ +