src-test/sys/amd64/isa/ithread.c, branch main

Initial landing of SMP support for FreeBSD/amd64.

2003-11-17T08:58:16Z

- This is heavily derived from John Baldwin's apic/pci cleanup on i386. - I have completely rewritten or drastically cleaned up some other parts. (in particular, bootstrap) - This is still a WIP. It seems that there are some highly bogus bioses on nVidia nForce3-150 boards. I can't stress how broken these boards are. I have a workaround in mind, but right now the Asus SK8N is broken. The Gigabyte K8NPro (nVidia based) is also mind-numbingly hosed. - Most of my testing has been with SCHED_ULE. SCHED_4BSD works. - the apic and acpi components are 'standard'. - If you have an nVidia nForce3-150 board, you are stuck with 'device atpic' in addition, because they somehow managed to forget to connect the 8254 timer to the apic, even though its in the same silicon! ARGH! This directly violates the ACPI spec.

Use __FBSDID().

2003-07-25T21:19:19Z

Brought to you by: a boring talk at Ottawa Linux Symposium

Commit MD parts of a loosely functional AMD64 port. This is based on

2003-05-01T01:05:25Z

a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.

Removed unused includes. In particular, don't include since

2002-01-30T12:23:49Z

its only effect is to break the optionality of the isa option. Sorted includes.

Add missing includes of sys/lock.h.

2001-10-11T17:52:20Z

- Use ICU_LEN rather than NHWI for the size of the array of ithreads.

2001-05-15T22:31:08Z

- Remove unneeded include of sys/ipl.h.

- Add a new ithread_schedule() function to do the bulk of the work of

2001-02-20T10:25:29Z

scheduling an interrupt thread to run when needed. This has the side effect of enabling support for entropy gathering from interrupts on all architectures. - Change the software interrupt and x86 and alpha hardware interrupt code to use ithread_schedule() for most of their processing when scheduling an interrupt to run. - Remove the pesky Warning message about interrupt threads having entropy enabled. I'm not sure why I put that in there in the first place. - Add more error checking for parameters and change some cases that returned EINVAL to panic on failure instead via KASSERT(). - Instead of doing a documented evil hack of setting the P_NOLOAD flag on every interrupt thread whose pri was SWI_CLOCK, set the flag explicity for clk_ithd's proc during start_softintr().

Allow the superuser to prefent all interrupt harvesting on

2001-02-18T17:47:55Z

her system.

RIP .

2001-02-11T10:44:09Z

Some things needed bits of - cy.c now has its own (only) copy of the COM_(UN)LOCK() macros, and IMASK_(UN)LOCK() has been moved to (AKA ). Reviewed by: jhb

Re-enable preemption on interrupts. My last commit accidentally reverted

2001-02-10T02:41:50Z

it as I was playing with some other ways of doing kernel preemption.