so the register is correctly sign-extended.
- Some comment fixes.
- Restore the FP state from the sigcontext if FP regs were saved.
- Fix up r0 for the benefit of the syscall stub.
This merge changes the device switch tables from static array to
dynamically generated by config(8).
- All device switches is defined as a constant structure in device drivers.
- The new grammer ``device-major'' is introduced to ``files''.
device-major <prefix> char <num> [block <num>] [<rules>]
- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.
- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.
- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.
- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.
- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.
.MAIN must be defined for the implicit target rule to kick in
this fixes compilation with call like 'make', i.e. without specified target
another option would be to move the .if make() condition after config(8)
generated goo, since config(8) implicitly generates a .MAIN: directive too,
but the MD .if make() really belongs into (7) misc settings section IMHO
If a segment starts exactly at 16M don't try to split it because that causes
the code to try to call uvm_page_physload with a zero length segment.
(kern/17199)
- Set up a Panic Stack,
- Don't pre-map the sysfpga at this time.
- Calculate the CPU speed only if SH5_CPU_SPEED isn't defined.
- On a related note, make the CPU speed probing code more accurate.
- Print the CPU speed at startup.
- Force RB_SINGLE for now, at least until I get a bootloader written.
- in _EXCEPTION_EXIT, copy the current ASID to the pre-exception
context before we switch.
- fix the pteg hash generation code and EPN masking in the tlb
miss handler.
Sprinkle some DIAGNOSTIC checks.
to ensure the callee-saved set will be restored when we switch to it.
(It doesn't actually matter to the new process; it just inherits some
crud in those registers from the kernel if we don't set the bit).
Also ensure the strings pointer in r7 is sign-extended.
Seems that we assume that the dram blocks are sorted, and that the first/lowest address is also where the kernel is.
If the above is not true, then we're on a kinetic (probably should make a better way to indicate this) So search for all dram blocks < with starting addr lower than the first block and remove them.
Currently there's minimal performance gain (which is odd as the SDRAM is meant to be faster, I'm wondering if we need to prod some hidden registers to set timing information.
Note that I still get 16MB/s compared with 7MB/s on RiscStation and 93MB/s on my cats. I'm thinking that something else is seriously nasty on acorn32.
any time we remove all access to a given virtual page,
we must invalidate the (write-through) L1 dcache.
pmap_remove() still had it, but pmap_kremove(), pmap_clear_reference()
and pmap_page_protect(VM_PROT_NONE) didn't and needed it.
fixes PR 18040.
section of another exception. This is likely to happen if the kernel
stack is misaligned, has dropped off the bottom of the PCB, or has
otherwise gone into orbit.
In this case, switch to a safe stack, save as much of the machine
state as possible and dump it to the console.
accessing the kernel stack, since a TLB miss on the kernel stack
will result in r24 being trashed.
Also clear the ES_CRITICAL flag just before returning to the
previous context.
