Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Xtensa Secondary Processors startup code.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 - 2013 Tensilica Inc.
9 *
10 * Joe Taylor <joe@tensilica.com>
11 * Chris Zankel <chris@zankel.net>
12 * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
13 * Pete Delaney <piet@tensilica.com>
14 */
15
16#include <linux/linkage.h>
17
18#include <asm/cacheasm.h>
19#include <asm/initialize_mmu.h>
20#include <asm/mxregs.h>
21#include <asm/regs.h>
22
23
24 .section .SecondaryResetVector.text, "ax"
25
26
27ENTRY(_SecondaryResetVector)
28 _j _SetupOCD
29
30 .begin no-absolute-literals
31 .literal_position
32
33_SetupOCD:
34 /*
35 * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
36 * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
37 * xt-gdb to single step via DEBUG exceptions received directly
38 * by ocd.
39 */
40#if XCHAL_HAVE_WINDOWED
41 movi a1, 1
42 movi a0, 0
43 wsr a1, windowstart
44 wsr a0, windowbase
45 rsync
46#endif
47
48 movi a1, LOCKLEVEL
49 wsr a1, ps
50 rsync
51
52_SetupMMU:
53#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
54 initialize_mmu
55#endif
56
57 /*
58 * Start Secondary Processors with NULL pointer to boot params.
59 */
60 movi a2, 0 # a2 == NULL
61 movi a3, _startup
62 jx a3
63
64 .end no-absolute-literals