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Last change
on this file 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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File size:
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| 1 | /**
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| 2 | * @addtogroup libc libc
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| 3 | * @brief HelenOS C library
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| 4 | * @ingroup libs
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| 5 | */
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| 6 |
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| 7 | /**
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| 8 | * @addtogroup libcabs32le abs32le
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| 9 | * @ingroup libc
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| 10 | */
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| 11 |
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| 12 | /**
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| 13 | * @addtogroup libcamd64 amd64
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| 14 | * @ingroup libc
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| 15 | */
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| 16 |
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| 17 | /**
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| 18 | * @addtogroup libcarm32 arm32
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| 19 | * @ingroup libc
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| 20 | */
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| 21 |
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| 22 | /**
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| 23 | * @addtogroup libcarm64 arm64
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| 24 | * @ingroup libc
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| 25 | */
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| 26 |
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| 27 | /**
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| 28 | * @addtogroup libcia32 ia32
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| 29 | * @ingroup libc
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| 30 | */
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| 31 |
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| 32 | /**
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| 33 | * @addtogroup libcia64 ia64
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| 34 | * @ingroup libc
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| 35 | */
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| 36 |
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| 37 | /**
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| 38 | * @addtogroup libcmips32 mips32
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| 39 | * @ingroup libc
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| 40 | */
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| 41 |
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| 42 | /**
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| 43 | * @addtogroup libcppc32 ppc32
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| 44 | * @ingroup libc
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| 45 | */
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| 46 |
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| 47 | /**
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| 48 | * @addtogroup libcriscv64 riscv64
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| 49 | * @ingroup libc
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| 50 | */
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| 51 |
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| 52 | /**
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| 53 | * @addtogroup libcsparc64 sparc64
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| 54 | * @ingroup libc
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| 55 | */
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| 56 |
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| 57 | /**
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| 58 | * @addtogroup rtld rtld
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| 59 | * @ingroup libc
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| 60 | */
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