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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 | */ | |
3e903bd9 | 32 | #include <linux/module.h> |
58f07778 DD |
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 | } | |
3e903bd9 | 73 | EXPORT_SYMBOL(cvmx_sysinfo_get); |
58f07778 DD |
74 | |
75 | /** | |
76 | * This function is used in non-simple executive environments (such as | |
70342287 | 77 | * Linux kernel, u-boot, etc.) to configure the minimal fields that |
58f07778 DD |
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: | |
70342287 RB |
84 | * Pointer to global physical memory descriptor |
85 | * (bootmem descriptor) @board_type: Octeon board | |
86 | * type enumeration | |
58f07778 DD |
87 | * |
88 | * @board_rev_major: | |
70342287 | 89 | * Board major revision |
58f07778 | 90 | * @board_rev_minor: |
70342287 | 91 | * Board minor revision |
58f07778 | 92 | * @cpu_clock_hz: |
70342287 | 93 | * CPU clock freqency in hertz |
58f07778 DD |
94 | * |
95 | * Returns 0: Failure | |
70342287 | 96 | * 1: success |
58f07778 DD |
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 | } |