No real functional change except how the smaller ARCH_DEFAULT_PAGE_SIZE
is now computed and set in defines.h instead of rules.mk for arch/arm to
be consistent with the other arch that has a large/small build (riscv).
Require the platform or arch to provide it. The default was pretty
obsolete, assuming a 32bit arch with a split 50/50 mapping. May as well
make it a forced arch thing so that it's known to be correct.
Had to define it for OR1K, it was already defined for all the other
(known) architectures.
To work properly with some hypervisors on various architectures (ARM,
ARM64, x86), add global routines to allow access to MMIO registers via
architecturally defined accessors.
Add accessors for ARM, ARM64, and x86-32/64. Have the other arches
default to just using whatever the compiler emits.
Will need to generally move things off the legacy REG*() accessors
since they're really not safe going forward with what compilers emit.
Previous to now it had always relied on a custom patched gcc
and a custom sim. In the interim since the initial port went in
some time in 2015 GCC and QEMU have both officially picked up support
for the architecture and the machine that was emulated in the previous
emultor.
Using gcc 10.2 fix up the build and get it basically working. Timers
seem to not be working right but it's probably fairly easy to fix.
This lets some arches return a 64bit counter.
As a result of fixing this, removed -Wno-format switch in the test app
which caused the need to fix a lot of printfs.
Previously, was relying on a regular definition with the arch_ops.h code
overriding it with a static inline. This has been annoying for some
years since it forces the declarations to be in order. Change it to
simple declare an inline wrapper around an arch_ routine that does
whatever it needs to do.
Almost nothing changes here except moving braces to the same line as the
function declaration. Everything else is largely whitespace changes and
a few dangling files with tab indents.
See scripts/codestyle
Ran everything through scripts/codestyle.space, which uses astyle
to generally follow K&R style.
Biggest non whitespace change is pulling brackets down on function
declarations, which I'm pretty ambivalent about, but astyle insists
on taking a stance
This allows for individual modules to extend the main linker script,
primarily to add their own sections to interate over.
Remove the main shared_* linker scripts.
This picks up the major work of allowing multiple heap implementations
and enable dlmalloc as an alternate heap to the simple existing one
(now called 'miniheap').
Also added a novm page allocator for memory management on systems too small
or missing an mmu to have a vm. Not much more than a simple bitmap allocator
that the heap pulls from. Allows for other heaps and/or users of physical
memory to coexist and span multiple banks of memory.
This add support for the OpenRISC 1000 architecture, and
as the architecture specification defines an on-chip tick-timer
and interrupt controller, drivers for those are included in
this commit.
Support to utilize the MMU is implemented,
and it can be opted in and out with WITH_KERNEL_VM
