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  */
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  */
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