e4d65228b5
- Move a bit of the shared logic of secondary bootstrapping into a new function, lk_secondary_cpu_entry_early() which sets the current cpu pointer before calling the first half of the secondary LK_INIT routines. - Create the per cpu idle threads on the main cpu instead of the secondary as they come up. - Tweak all of the SMP capable architectures to use this new path. - Move the top level mp routines into a separate file top/mp.c - A bit more correctly ifdef out more SMP code.
The Little Kernel Embedded Operating System
The LK kernel is an SMP-aware kernel designed for small systems ported to a variety of platforms and cpu architectures.
It is used in a variety of open source and closed source projects, notably the bootloader for a lot of Android phones of various make.
See https://github.com/littlekernel/lk for the latest version.
For comprehensive documentation, see Index.
High Level Features
- Fully-reentrant multi-threaded preemptive kernel
- Portable to many 32 and 64 bit architectures
- Support for wide variety of embedded and larger platforms
- Powerful modular build system
- Large number of utility components selectable at build time
Supported architectures
- ARM32
- Cortex-M class cores (armv6m - armv8m)
- ARMv7+ Cortex-A class cores
- ARM64
- ARMv8 and ARMv9 cores
- RISC-V 32 and 64bit bit in machine and supervisor mode
- x86-32 and x86-64
- Motorola 68000
- Microblaze
- MIPS
- OpenRISC 1000
- VAX (experimental)