genode/repos/base-hw/src/lib
Stefan Kalkowski 6d48b5484d hw: correct the ARM cache maintainance operations
This commit fixes the following issues regarding cache maintainance
under ARM:

* read out I-, and D-cache line size at runtime and use the correct one
* remove 'update_data_region' call from unprivileged syscalls
* rename 'update_instr_region' syscall to 'cache_coherent_region' to
  reflect what it doing, namely make I-, and D-cache coherent
* restrict 'cache_coherent_region' syscall to one page at a time
* lookup the region given in a 'cache_coherent_region' syscall in the
  page-table of the PD to prevent machine exceptions in the kernel
* only clean D-cache lines, do not invalidate them when pages where
  added on Cortex-A8 and ARMv6 (MMU sees phys. memory here)
* remove unused code relicts of cache maintainance

In addition it introduces per architecture memory clearance functions
used by core, when preparing new dataspaces. Thereby, it optimizes:

* on ARMv7 using per-word assignments
* on ARMv8 using cacheline zeroing
* on x86_64 using 'rept stosq' assembler instruction

Fix #3685
2020-03-26 11:38:55 +01:00
..
base hw: correct the ARM cache maintainance operations 2020-03-26 11:38:55 +01:00
hw hw: introduce virtualization support for ARMv8 2019-11-21 14:29:36 +01:00
ld/hw Genode application binary interface (ABI) 2016-12-23 16:50:28 +01:00
muen hw: replace lock-safe log variants in kernel 2019-04-09 12:30:35 +02:00
startup/spec/riscv Adjust file headers to refer to the AGPLv3 2017-02-28 12:59:29 +01:00