FreeBSD/Linux Kernel Cross Reference
sys/mips/mips/mpboot.S
1 /*-
2 * Copyright (c) 2010 Neelkanth Natu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/12.0/sys/mips/mips/mpboot.S 331254 2018-03-20 17:58:51Z emaste $
27 */
28
29 #include <machine/asm.h>
30 #include <machine/cpu.h>
31 #include <machine/cpuregs.h>
32
33 #include "assym.inc"
34
35 .text
36 .set noat
37 .set noreorder
38
39 /* XXX move this to a header file */
40 #if defined(CPU_CNMIPS)
41 #define CLEAR_STATUS \
42 mfc0 a0, MIPS_COP_0_STATUS ;\
43 li a2, (MIPS_SR_KX | MIPS_SR_SX | MIPS_SR_UX) ; \
44 or a0, a0, a2 ; \
45 li a2, ~(MIPS_SR_INT_IE | MIPS_SR_EXL | MIPS_SR_KSU_USER | MIPS_SR_BEV) ; \
46 and a0, a0, a2 ; \
47 mtc0 a0, MIPS_COP_0_STATUS
48 #elif defined(__mips_n64)
49 #define CLEAR_STATUS \
50 li a0, (MIPS_SR_KX | MIPS_SR_UX) ; \
51 mtc0 a0, MIPS_COP_0_STATUS
52 #else
53 #define CLEAR_STATUS \
54 mtc0 zero, MIPS_COP_0_STATUS
55 #endif
56
57 GLOBAL(mpentry)
58 CLEAR_STATUS /* disable interrupts */
59
60 mtc0 zero, MIPS_COP_0_CAUSE /* clear soft interrupts */
61
62 li t0, MIPS_CCA_CACHED /* make sure kseg0 is cached */
63 mtc0 t0, MIPS_COP_0_CONFIG
64 COP0_SYNC
65
66 jal platform_processor_id /* get the processor number */
67 nop
68 move s0, v0
69
70 /*
71 * Initialize stack and call machine startup
72 */
73 PTR_LA sp, _C_LABEL(pcpu_space)
74 addiu sp, (PAGE_SIZE * 2) - CALLFRAME_SIZ
75 sll t0, s0, PAGE_SHIFT + 1
76 addu sp, sp, t0
77
78 /* Zero out old ra and old fp for debugger */
79 sw zero, CALLFRAME_SIZ - 4(sp)
80 sw zero, CALLFRAME_SIZ - 8(sp)
81
82 PTR_LA gp, _C_LABEL(_gp)
83
84 jal platform_init_ap
85 move a0, s0
86 jal smp_init_secondary
87 move a0, s0
88
89 PANIC("AP startup failed!")
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