Hi, sharma: Thank you very much! I got it: Arm-trusted-firmware is the first running code on Foundation model. It runs at aarch64 execution state.
Best wishes, -----邮件原件----- 发件人: bhupesh.sha...@freescale.com [mailto:bhupesh.sha...@freescale.com] 发送时间: 2014年1月13日 12:48 收件人: 'edk2-devel@lists.sourceforge.net' 主题: Re: [edk2] [edk2-ARM] ARMv8 bootloader question Hi Tiger, Yes, the Trusted firmware runs in EL3 and calls the UEFI boot firmware which runs in EL2. In the trusted firmware project https://github.com/ARM-software/arm-trusted-firmware you will find the instructions to launch UEFI from this firmware on the ARM FVPs (fixed Virtual Platforms) - for example the FVP_Base_AEMv8A-AEMv8A, in the readme.md file (https://github.com/ARM-software/arm-trusted-firmware/blob/master/readme.md) Note that the Trusted Firmware has only been tested only on 64-bit versions of the ARM FVPs, so don't know how you will use to test the same for your 32-bit AArch32 code. Regards, Bhupesh > -----Original Message----- > From: tiger...@viatech.com.cn [mailto:tiger...@viatech.com.cn] > Sent: Monday, January 13, 2014 10:10 AM > To: edk2-devel@lists.sourceforge.net > Subject: Re: [edk2] [edk2-ARM] ARMv8 bootloader question > > Hi, sharma: > I used arm-none-linux-gnueabi-gcc-4.5.2 to compile 32bit uefi code. > I have a question about foundation model: > 1. There is an Open Source implementation of the Trusted/Secure Firmware: > https://github.com/ARM-software/arm-trusted-firmware > So, what is the relationship between arm-trusted-firmware and aarch64 > uefi boot code. > Arm-trusted-firmware will load aarch64 uefi boot code and jump to run > it? > > Best wishes, > -----邮件原件----- > 发件人: bhupesh.sha...@freescale.com > [mailto:bhupesh.sha...@freescale.com] > 发送时间: 2014年1月13日 12:02 > 收件人: edk2-devel@lists.sourceforge.net > 主题: Re: [edk2] [edk2-ARM] ARMv8 bootloader question > > Hi Tiger, > > You can use the AArch64 foundation model support code in the EDK2 code > base to write reference code for your ARMv8 SoC. > > Also which toolchain do you use for compiling your AArch32 (32-bit code)? > > Regards, > Bhupesh > > > > -----Original Message----- > > From: tiger...@viatech.com.cn [mailto:tiger...@viatech.com.cn] > > Sent: Monday, January 13, 2014 9:16 AM > > To: edk2-devel@lists.sourceforge.net > > Subject: Re: [edk2] [edk2-ARM] ARMv8 bootloader question > > > > Hi, sharma: > > Thanks for your answer! > > I described my understanding on current ARM UEFI code: > > 1. Most ARM UEFI code package is based on ARMv7 SOCs. > > Because of lacking ARMv8 development board, so enthusiast ported > > uefi code on 32bit SOC. > > 2. ARMv8 supports aarch32 state. > > So, if ARMv8 SOC powered to aarch32 state: > > Developer could use current 32bit uefi code as code base to boot > > to uefi shell environment. > > 3. at uefi shell environment, there are 2 methods to boot 64bit linux > > kernel. > > (1) switch to aarch64 state, then boot to linux kernel's entry > point. > > (2) linux kernel's entry point included code to switch itself's > > execute state to aarch64.if this assumption exist, uefi bootloader > > just keep aarch32 state. > > > > Best wishes, > > -----邮件原件----- > > 发件人: bhupesh.sha...@freescale.com > > [mailto:bhupesh.sha...@freescale.com] > > 发送时间: 2014年1月13日 11:26 > > 收件人: 'edk2-devel@lists.sourceforge.net' > > 抄送: 'oliviermar...@users.sourceforge.net' > > 主题: Re: [edk2] [edk2-ARM] ARMv8 bootloader question > > > > Hi Tiger, > > > > AFAIK, the AArch64 ISA is written from scratch for 64-bit support. > > Although it is backward compatible with AArch32 and binaries compiled > > for > > AArch32 (ARMv7 compatible) are supposed to run well on the ARMv8 > > machine running in AArch32 mode. > > > > However, as per my understanding (and Olivier can correct me if I am > > wrong here), the UEFI code for ARMv8 executes in AArch64 mode - > > usually if the ARM core boots up in AArch64 in EL3, bootloaders like > > UEFI/u-boot also execute in AArch64 EL3 or EL2. > > > > Regards, > > Bhupesh > > > > > > > -----Original Message----- > > > From: tiger...@viatech.com.cn [mailto:tiger...@viatech.com.cn] > > > Sent: Monday, January 13, 2014 6:32 AM > > > To: edk2-devel@lists.sourceforge.net > > > Cc: oliviermar...@users.sourceforge.net > > > Subject: [edk2] [edk2-ARM] ARMv8 bootloader question > > > > > > Hi, Oliver: > > > I have a question abourt ARMv8 CPU's bootloader. > > > ARMv8 supports: AARCH32 / AARCH64 > > > Take an example: > > > An ARMv8 SOC, when power up / reset, its default state is : AARCH32 > > > Then, could i still run an old arm uefi bootloader which written by > > > ARMv7 instruction set? > > > I will switch ARMv8 SOC to AARCH64 before jumping into linux kernel. > > > Is it possible? > > > > > > Best wishes, > > > > > > -------------------------------------------------------------------- > > > -- > > > --- > > > ----- > > > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > > > Learn Why More Businesses Are Choosing CenturyLink Cloud For > > > Critical Workloads, Development Environments & Everything In Between. > > > Get a Quote or Start a Free Trial Today. > > > > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg. > > > clk > > > trk > > > _______________________________________________ > > > edk2-devel mailing list > > > edk2-devel@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/edk2-devel > > > > > > > > > ---------------------------------------------------------------------- > > --- > > ----- > > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > > Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical > > Workloads, Development Environments & Everything In Between. > > Get a Quote or Start a Free Trial Today. > > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg. > > clk > > trk > > _______________________________________________ > > edk2-devel mailing list > > edk2-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/edk2-devel > > > > ---------------------------------------------------------------------- > > --- > > ----- > > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > > Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical > > Workloads, Development Environments & Everything In Between. > > Get a Quote or Start a Free Trial Today. > > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg. > > clk > > trk > > _______________________________________________ > > edk2-devel mailing list > > edk2-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/edk2-devel > ------------------------------------------------------------------------- > ----- > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical > Workloads, Development Environments & Everything In Between. > Get a Quote or Start a Free Trial Today. > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clk > trk > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/edk2-devel > > ------------------------------------------------------------------------- > ----- > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical > Workloads, Development Environments & Everything In Between. > Get a Quote or Start a Free Trial Today. > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clk > trk > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. 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