1/***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT.  See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28/*
29 * This module provides system/board/application information obtained
30 * by the bootloader.
31 */
32#include <linux/module.h>
33
34#include <asm/octeon/cvmx.h>
35#include <asm/octeon/cvmx-spinlock.h>
36#include <asm/octeon/cvmx-sysinfo.h>
37
38/**
39 * This structure defines the private state maintained by sysinfo module.
40 *
41 */
42static struct {
43	struct cvmx_sysinfo sysinfo;	   /* system information */
44	cvmx_spinlock_t lock;	   /* mutex spinlock */
45
46} state = {
47	.lock = CVMX_SPINLOCK_UNLOCKED_INITIALIZER
48};
49
50
51/*
52 * Global variables that define the min/max of the memory region set
53 * up for 32 bit userspace access.
54 */
55uint64_t linux_mem32_min;
56uint64_t linux_mem32_max;
57uint64_t linux_mem32_wired;
58uint64_t linux_mem32_offset;
59
60/**
61 * This function returns the application information as obtained
62 * by the bootloader.  This provides the core mask of the cores
63 * running the same application image, as well as the physical
64 * memory regions available to the core.
65 *
66 * Returns  Pointer to the boot information structure
67 *
68 */
69struct cvmx_sysinfo *cvmx_sysinfo_get(void)
70{
71	return &(state.sysinfo);
72}
73EXPORT_SYMBOL(cvmx_sysinfo_get);
74
75/**
76 * This function is used in non-simple executive environments (such as
77 * Linux kernel, u-boot, etc.)	to configure the minimal fields that
78 * are required to use simple executive files directly.
79 *
80 * Locking (if required) must be handled outside of this
81 * function
82 *
83 * @phy_mem_desc_ptr:
84 *		     Pointer to global physical memory descriptor
85 *		     (bootmem descriptor) @board_type: Octeon board
86 *		     type enumeration
87 *
88 * @board_rev_major:
89 *		     Board major revision
90 * @board_rev_minor:
91 *		     Board minor revision
92 * @cpu_clock_hz:
93 *		     CPU clock freqency in hertz
94 *
95 * Returns 0: Failure
96 *	   1: success
97 */
98int cvmx_sysinfo_minimal_initialize(void *phy_mem_desc_ptr,
99				    uint16_t board_type,
100				    uint8_t board_rev_major,
101				    uint8_t board_rev_minor,
102				    uint32_t cpu_clock_hz)
103{
104
105	/* The sysinfo structure was already initialized */
106	if (state.sysinfo.board_type)
107		return 0;
108
109	memset(&(state.sysinfo), 0x0, sizeof(state.sysinfo));
110	state.sysinfo.phy_mem_desc_ptr = phy_mem_desc_ptr;
111	state.sysinfo.board_type = board_type;
112	state.sysinfo.board_rev_major = board_rev_major;
113	state.sysinfo.board_rev_minor = board_rev_minor;
114	state.sysinfo.cpu_clock_hz = cpu_clock_hz;
115
116	return 1;
117}
118