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 */
42 static 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 */
55 uint64_t linux_mem32_min;
56 uint64_t linux_mem32_max;
57 uint64_t linux_mem32_wired;
58 uint64_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 */
cvmx_sysinfo_get(void)69 struct cvmx_sysinfo *cvmx_sysinfo_get(void)
70 {
71 return &(state.sysinfo);
72 }
73 EXPORT_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 */
cvmx_sysinfo_minimal_initialize(void * phy_mem_desc_ptr,uint16_t board_type,uint8_t board_rev_major,uint8_t board_rev_minor,uint32_t cpu_clock_hz)98 int 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