04b88750b3
Most of the functions for this was declared in a top level lk/ include space, so go ahead and move it there. A few exceptions: - Moved spin() over to platform/time.h and platform/time.c since the function more logically belongs to platform/time.h. Any users of spin() will need to update their headers to include platform/time.h instead. - Renamed spin_cycles() to arm_cm_spin_cycles() and moved over into arm/cm.h since it is currently defined in arch/arm-m and only used for targets that implicitly are for arm-m.
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)