Logically the previous code should have worked but didn't. It appeared to
fail when reading the relocation table from physical memory.
To work-around this issue we now compact the relocation table (it shrinks
from ~800 entries to ~15 on a 2.5MB kernel) The compacted table is small
enough to copy into the page of memory we use to do the relocations. The
relocation code can now find the table, and carry out the relocations.
To help with debugging the screen border will change colour:
Red: Running without the MMU turned on (IE 1-1 physical mapping)
Note that the border will stay red a while as we're copying the
kernel over at this point.
Green: We've finished copying the kernel over (unless the code breaks
this will be rarely seen)
Blue: We're running on the bootstrap L1 table, and just about to call
the kernel.
Other tweaks include:
* copy the kernel 32bits at a time, rather than 8 bits at a time.
* assert that the relocations are 32bit aligned (so the above works)
* flush the cache and write buffers before turning off the MMU.
Tested by myself on an A7000+. Tested by skrll@ on Risc-PC and A7000.
just options CPU_IN_CKSUM.
Include std.arm in all arm platform std files.
This should reenable the asm in_cksum code for all arm platforms.
Also remove the now unused in_cksum_arm.S.
the Processor local memory, so that should provide a speed up.
Currently DMA won't work, as we only tell the kernel about the kinetic
memory, and exclude the motherboard memory. I'll look at fixing this over
the weekend.
Add support for kernels > 4MiB. The -current INSTALL kernel has now hit
25KiB over 4MiB and we were only adding L1 mappings for 4MiB.
Also added lots of tracing which I used to work out what boot32 was doing,
and so what the kernel was meant to be doing. This is disabled by default.
Out of paranoia also become a client of all domains before setting the ttb,
just in case RISC-OS ever decides to use domains.
All of this has been tested on my Kinetic Risc-PC. I've carried out a full
install onto it, and hope to use it for testing out the interrupt work I've
been doing.
With these changes the kinetic dram blocks are correctly identified and
passed into the kernel.
Note that I've a pending kernel change to understand the kinetic blocks
and do something useful with them.
sizeof(*bconfig) not sizeof(bconfig)
Now a small kernel will boot up on my RISC-PC, an install kernel won't
though, it hangs at the switch from RISC-OS to NetBSD.
- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.
SEMMNI, SEMMNS, SEMUME and SHMMAXPGS.
They can be tweaked via sysctl now. Ports that were setting values on
them weren't touched, I only removed the ones that were commented out.
This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.
TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.
NOTES:
pmppc was removed as an arch, and moved to a evbppc target.
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.
from doc/BRANCHES:
idle lwp, and some changes depending on it.
1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.
debugging and its main use is in device drivers. Its used there to signal
that the flagged buffer has a special meaning or should be handled
differently.
OK'd by Bill Sudenmund on tech-kern.
- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.
- Add COMPAT_15 to all the kernel that had COMPAT_14, for the sake of coherency
- Remove the only occurences of #ifdef COMPAT_15 in the tree: for the ARM
ports, COMPAT_15 was always used in conjunction with EXEC_AOUT. Only EXEC_AOUT
matters here.
This address kern/18407
