Re: EFI payload in 64 bit mode?
On 24.04.24 09:55, Philip Oberfichtner wrote: Hi, I'm wondering if it is currently possible to have U-Boot run in 64-bit mode as EFI payload. TARGET_EFI_APP64 selects X86_64 to achieve this. TARGET_EFI_PAYLOAD does currently always switch 32-bit mode. Any hints what would have to be done to get it to run in 64-bit mode? Thanks in advance, Philip There are two defconfigs: efi-x86_payload64_defconfig efi-x86_payload32_defconfig efi-x86_payload64_defconfig builds a 64bit EFI binary. efi-x86_payload32_defconfig builds a 32bit EFI binary. The essential difference is that one selects CONFIG_EFI_STUB_32BIT and the other CONFIG_EFI_STUB_64BIT. U-Boot itself always runs at 32bit because CONFIG_X86_RUN_32BIT=y. To allow running at 64bit you would need at least need to change: * jump_to_uboot() needs to execute a 64bit call to main U-Boot * CONFIG_X86_RUN_64BIT should not select SPL if TARGET_EFI_PAYLOAD * the definition of the global data pointer needs to be adjusted Best regards Heinrich
EFI payload in 64 bit mode?
Hi, I'm wondering if it is currently possible to have U-Boot run in 64-bit mode as EFI payload. TARGET_EFI_APP64 selects X86_64 to achieve this. TARGET_EFI_PAYLOAD does currently always switch 32-bit mode. Any hints what would have to be done to get it to run in 64-bit mode? Thanks in advance, Philip -- = DENX Software Engineering GmbH,Managing Director: Erika Unter HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-22 Fax: +49-8142-66989-80 Email: p...@denx.de =
