2 * Copyright (c) 2001 Jake Burkholder.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <machine/asm.h>
30 __FBSDID("$FreeBSD$");
32 #include <machine/asi.h>
33 #include <machine/asmacros.h>
34 #include <machine/pstate.h>
41 .set kernbase,KERNBASE
47 * void _start(caddr_t metadata, u_long o1, u_long o2, u_long o3,
53 * Initialize misc state to known values. Interrupts disabled, normal
54 * globals, windows flushed (cr = 0, cs = nwindows - 1), no clean
55 * windows, pil 0, and floating point disabled.
57 wrpr %g0, PSTATE_NORMAL, %pstate
59 wrpr %g0, 0, %cleanwin
64 * Get onto our per-cpu panic stack, which precedes the struct pcpu in
67 SET(pcpu0 + (PCPU_PAGES * PAGE_SIZE) - PC_SIZEOF, %l1, %l0)
68 sub %l0, SPOFF + CCFSZ, %sp
71 * Do initial bootstrap to setup pmap and thread0.
78 * Get onto thread0's kstack.
80 ldx [%g6 + PCB_KSTACK], %sp
83 * And away we go. This doesn't return.
92 * void cpu_setregs(struct pcpu *pc)
97 * Disable interrupts, normal globals.
102 * store PCPU_REG into its scratchpad register
103 * this allows us to retrieve it in the trap handlers -
104 * where we receive a new set of globals
106 mov SCRATCH_REG_PCPU, %g2
107 stxa PCPU_REG, [%g2]ASI_SCRATCHPAD