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-rw-r--r--arch/mips/cavium-octeon/executive/cvmx-sysinfo.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-sysinfo.c b/arch/mips/cavium-octeon/executive/cvmx-sysinfo.c
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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
33#include <asm/octeon/cvmx.h>
34#include <asm/octeon/cvmx-spinlock.h>
35#include <asm/octeon/cvmx-sysinfo.h>
36
37/**
38 * This structure defines the private state maintained by sysinfo module.
39 *
40 */
41static struct {
42 struct cvmx_sysinfo sysinfo; /* system information */
43 cvmx_spinlock_t lock; /* mutex spinlock */
44
45} state = {
46 .lock = CVMX_SPINLOCK_UNLOCKED_INITIALIZER
47};
48
49
50/*
51 * Global variables that define the min/max of the memory region set
52 * up for 32 bit userspace access.
53 */
54uint64_t linux_mem32_min;
55uint64_t linux_mem32_max;
56uint64_t linux_mem32_wired;
57uint64_t linux_mem32_offset;
58
59/**
60 * This function returns the application information as obtained
61 * by the bootloader. This provides the core mask of the cores
62 * running the same application image, as well as the physical
63 * memory regions available to the core.
64 *
65 * Returns Pointer to the boot information structure
66 *
67 */
68struct cvmx_sysinfo *cvmx_sysinfo_get(void)
69{
70 return &(state.sysinfo);
71}
72
73/**
74 * This function is used in non-simple executive environments (such as
75 * Linux kernel, u-boot, etc.) to configure the minimal fields that
76 * are required to use simple executive files directly.
77 *
78 * Locking (if required) must be handled outside of this
79 * function
80 *
81 * @phy_mem_desc_ptr:
82 * Pointer to global physical memory descriptor
83 * (bootmem descriptor) @board_type: Octeon board
84 * type enumeration
85 *
86 * @board_rev_major:
87 * Board major revision
88 * @board_rev_minor:
89 * Board minor revision
90 * @cpu_clock_hz:
91 * CPU clock freqency in hertz
92 *
93 * Returns 0: Failure
94 * 1: success
95 */
96int cvmx_sysinfo_minimal_initialize(void *phy_mem_desc_ptr,
97 uint16_t board_type,
98 uint8_t board_rev_major,
99 uint8_t board_rev_minor,
100 uint32_t cpu_clock_hz)
101{
102
103 /* The sysinfo structure was already initialized */
104 if (state.sysinfo.board_type)
105 return 0;
106
107 memset(&(state.sysinfo), 0x0, sizeof(state.sysinfo));
108 state.sysinfo.phy_mem_desc_ptr = phy_mem_desc_ptr;
109 state.sysinfo.board_type = board_type;
110 state.sysinfo.board_rev_major = board_rev_major;
111 state.sysinfo.board_rev_minor = board_rev_minor;
112 state.sysinfo.cpu_clock_hz = cpu_clock_hz;
113
114 return 1;
115}
116