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/*-
* Copyright (c) 2001 Jake Burkholder.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include <machine/asi.h>
#include <machine/asmacros.h>
#include <machine/intr_machdep.h>
#include <machine/pstate.h>
#include <machine/wstate.h>
#include "assym.s"
.register %g2,#ignore
.globl kernbase
.set kernbase, KERNBASE
/*
* void _start(caddr_t metadata, u_long o1, u_long o2, u_long o3,
* u_long ofw_vec)
*/
ENTRY(btext)
ENTRY(_start)
/*
* Initialize misc. state to known values: interrupts disabled, normal
* globals, windows flushed (cr = 0, cs = nwindows - 1), PIL_TICK and
* floating point disabled.
* Note that some firmware versions don't implement a clean window
* trap handler so we unfortunately can't clear the windows by setting
* %cleanwin to zero here.
*/
wrpr %g0, PSTATE_NORMAL, %pstate
flushw
wrpr %g0, PIL_TICK, %pil
wr %g0, 0, %fprs
/*
* Get onto our per-CPU panic stack, which precedes the struct pcpu in
* the per-CPU page.
*/
SET(pcpu0 + (PCPU_PAGES * PAGE_SIZE) - PC_SIZEOF, %l1, %l0)
sub %l0, SPOFF + CCFSZ, %sp
/*
* Do initial bootstrap to setup pmap and thread0.
*/
call sparc64_init
nop
/*
* Get onto thread0's kstack.
*/
sub PCB_REG, SPOFF + CCFSZ, %sp
/*
* And away we go. This doesn't return.
*/
call mi_startup
nop
sir
! NOTREACHED
END(_start)
/*
* void cpu_setregs(struct pcpu *pc)
*/
ENTRY(cpu_setregs)
ldx [%o0 + PC_CURPCB], %o1
/*
* Ensure we are on normal globals.
*/
wrpr %g0, PSTATE_NORMAL, %pstate
/*
* Normal %g6 points to the current thread's PCB, and %g7 points to
* the per-CPU data structure.
*/
mov %o1, PCB_REG
mov %o0, PCPU_REG
/*
* Switch to alternate globals.
*/
wrpr %g0, PSTATE_ALT, %pstate
/*
* Alternate %g5 points to a per-CPU panic stack, %g6 points to the
* current thread's PCB, and %g7 points to the per-CPU data structure.
*/
mov %o0, ASP_REG
mov %o1, PCB_REG
mov %o0, PCPU_REG
/*
* Switch to interrupt globals.
*/
wrpr %g0, PSTATE_INTR, %pstate
/*
* Interrupt %g7 points to the per-CPU data structure.
*/
mov %o0, PCPU_REG
/*
* Switch to normal globals again.
*/
wrpr %g0, PSTATE_NORMAL, %pstate
/*
* Force trap level 1 and take over the trap table.
*/
SET(tl0_base, %o2, %o1)
SET(tba_taken_over, %o3, %o2)
mov 1, %o3
wrpr %g0, WSTATE_KERNEL, %wstate
wrpr %g0, 1, %tl
wrpr %o1, 0, %tba
stw %o3, [%o2]
retl
nop
END(cpu_setregs)
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