| .. SPDX-License-Identifier: GPL-2.0+ |
| |
| Arm Versatile Express |
| ===================== |
| |
| The vexpress_* board configuration supports the following platforms: |
| |
| * FVP_Base_RevC-2xAEMvA |
| * FVP_BaseR_AEMv8R |
| * Juno development board |
| |
| Fixed Virtual Platforms |
| ----------------------- |
| |
| The Fixed Virtual Platforms (FVP) are complete simulations of an Arm system, |
| including processor, memory and peripherals. They are set out in a "programmer's |
| view", which gives a comprehensive model on which to build and test software. |
| |
| The supported FVPs are available free of charge and can be downloaded from the |
| Arm developer site [1]_ (user registration might be required). |
| |
| Supported features: |
| |
| * GICv3 |
| * Generic timer |
| * PL011 UART |
| * SMC91111 network interface |
| |
| The default configuration assumes that U-Boot is boostrapped from the start of |
| the DRAM (address 0x80000000 for AEMvA; 0x00000000 for AEMv8R) using a suitable |
| bootloader. Alternatively, U-Boot can be launched directly by mapping the binary |
| to the same address (using the FVP's --data argument). |
| |
| The FVPs can be debugged using Arm Development Studio [2]_. |
| |
| FVP_BaseR |
| ^^^^^^^^^ |
| |
| On Armv8r64 platforms (such as the FVP_BaseR), U-Boot runs at S-EL2, so |
| CONFIG_ARMV8_SWITCH_TO_EL1 is defined so that the next stage boots at S-EL1. If |
| S-EL2 is desired instead, the *armv8_switch_to_el1* environment variable is |
| available. This can be set to *n* to override the config flag and boot the next |
| stage at S-EL2 instead. |
| |
| Juno |
| ---- |
| |
| The Juno development board is an open, vendor-neutral Armv8-A development |
| platform that supports an out-of-the-box Linux software package. A range of |
| plug-in expansion options enables hardware and software applications to be |
| developed and debugged. |
| |
| References |
| ---------- |
| |
| .. [1] https://developer.arm.com/tools-and-software/simulation-models/fixed-virtual-platforms |
| .. [2] https://developer.arm.com/tools-and-software/embedded/arm-development-studio |