source: mainline/.gitignore@ a4bd537

Last change on this file since a4bd537 was a4bd537, checked in by Petr Pavlu <setup@…>, 7 years ago

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.
  • Property mode set to 100644
File size: 11.4 KB
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1*.a
2*.check.c
3*.d
4*.deflate
5*.disasm
6*.la
7*.lo
8*.map
9*.o
10*.prev
11*.pyc
12*.so.*
13/Makefile.common
14/Makefile.config
15/PKG
16/QEMU_EFI_ARM64.fd
17/common.h
18/config.h
19/cscope.out
20/downloads
21/hdisk.img
22/image.boot
23/image.iso
24/uImage.bin
25autotool/
26boot/arch/arm32/_link.ld
27boot/arch/arm64/_link.ld
28boot/arch/ia64/_link.ld
29boot/arch/mips32/_link.ld
30boot/arch/ppc32/_link.ld
31boot/arch/sparc64/_link.ld
32boot/components.h
33boot/components.o.new
34boot/components.s
35boot/components.tar
36boot/components.zip
37boot/components_desc.c
38boot/distroot/
39boot/image.bin
40boot/image.boot
41boot/image.raw
42boot/initrd.img
43boot/initrd.img.gz
44common.h.new
45deps.mk
46doxygen/doxygen.cfg
47doxygen/doxygen.cfg.gen
48doxygen/html/
49doxygen/latex/
50kernel/arch/abs32le/_link.ld
51kernel/arch/amd64/_link.ld
52kernel/arch/arm32/_link.ld
53kernel/arch/arm64/_link.ld
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55kernel/arch/ia64/_link.ld
56kernel/arch/mips32/_link.ld
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58kernel/arch/sparc64/_link.ld
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