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