lfn
serial
ticket/834-toolchain-update
topic/msim-upgrade
topic/simplify-dev-export
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Last change
on this file since 84176f3 was 84176f3, checked in by Jakub Jermář <jakub@…>, 6 years ago |
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arm64: Add support for the architecture
This changeset adds basic support to run HelenOS on AArch64, targeting
the QEMU virt platform.
Boot:
- Boot relies on the EDK II firmware, GRUB2 for EFI and the HelenOS
bootloader (UEFI application). EDK II loads GRUB2 from a CD, GRUB2
loads the HelenOS bootloader (via UEFI) which loads OS components.
- UEFI applications use the PE/COFF format and must be relocatable. The
first problem is solved by manually having the PE/COFF headers and
tables written in assembler. The relocatable requirement is addressed
by compiling the code with -fpic and having the bootloader relocate
itself at its startup.
Kernel:
- Kernel code for AArch64 consists mostly of stubbing out various
architecture-specific hooks: virtual memory management, interrupt and
exception handling, context switching (including FPU lazy switching),
support for virtual timer, atomic sequences and barriers, cache and
TLB maintenance, thread and process initialization.
- The patch adds a kernel driver for GICv2 (interrupt controller).
- The PL011 kernel driver is extended to allow userspace to take
ownership of the console.
- The current code is not able to dynamically obtain information about
available devices on the underlying machine. The port instead
implements a machine-func interface similar to the one implemented by
arm32. It defines a machine for the QEMU AArch64 virt platform. The
configuration (device addresses and IRQ numbers) is then baked into
the machine definition.
User space:
- Uspace code for AArch64 similarly mostly implements
architecture-specific hooks: context saving/restoring, syscall
support, TLS support.
The patchset allows to boot the system but user interaction with the OS
is not yet possible.
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Property mode
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100644
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File size:
262 bytes
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| 1 | /** @addtogroup boot boot
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| 2 | * @brief HelenOS boot infrastructure
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| 3 | */
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| 4 |
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| 5 | /**
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| 6 | * @addtogroup boot_generic generic
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| 7 | * @ingroup boot
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| 8 | */
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| 9 |
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| 10 | /** @addtogroup boot_arm32 arm32
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| 11 | * @ingroup boot
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| 12 | */
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| 13 |
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| 14 | /** @addtogroup boot_arm64 arm64
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| 15 | * @ingroup boot
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| 16 | */
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