118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
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/***********************license start***************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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* This file is part of the OCTEON SDK
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*
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* Copyright (c) 2003-2008 Cavium Networks
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* or visit http://www.gnu.org/licenses/.
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*
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* This file may also be available under a different license from Cavium.
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* Contact Cavium Networks for more information
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***********************license end**************************************/
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/*
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* This module provides system/board/application information obtained
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* by the bootloader.
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*/
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#include <linux/module.h>
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#include <asm/octeon/cvmx.h>
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#include <asm/octeon/cvmx-spinlock.h>
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#include <asm/octeon/cvmx-sysinfo.h>
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/**
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* This structure defines the private state maintained by sysinfo module.
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*
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*/
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static struct {
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struct cvmx_sysinfo sysinfo; /* system information */
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cvmx_spinlock_t lock; /* mutex spinlock */
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} state = {
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.lock = CVMX_SPINLOCK_UNLOCKED_INITIALIZER
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};
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/*
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* Global variables that define the min/max of the memory region set
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* up for 32 bit userspace access.
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*/
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uint64_t linux_mem32_min;
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uint64_t linux_mem32_max;
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uint64_t linux_mem32_wired;
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uint64_t linux_mem32_offset;
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/**
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* This function returns the application information as obtained
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* by the bootloader. This provides the core mask of the cores
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* running the same application image, as well as the physical
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* memory regions available to the core.
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*
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* Returns Pointer to the boot information structure
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*
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*/
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struct cvmx_sysinfo *cvmx_sysinfo_get(void)
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{
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return &(state.sysinfo);
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}
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EXPORT_SYMBOL(cvmx_sysinfo_get);
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/**
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* This function is used in non-simple executive environments (such as
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* Linux kernel, u-boot, etc.) to configure the minimal fields that
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* are required to use simple executive files directly.
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*
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* Locking (if required) must be handled outside of this
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* function
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*
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* @phy_mem_desc_ptr:
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* Pointer to global physical memory descriptor
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* (bootmem descriptor) @board_type: Octeon board
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* type enumeration
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*
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* @board_rev_major:
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* Board major revision
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* @board_rev_minor:
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* Board minor revision
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* @cpu_clock_hz:
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* CPU clock freqency in hertz
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*
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* Returns 0: Failure
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* 1: success
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*/
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int cvmx_sysinfo_minimal_initialize(void *phy_mem_desc_ptr,
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uint16_t board_type,
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uint8_t board_rev_major,
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uint8_t board_rev_minor,
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uint32_t cpu_clock_hz)
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{
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/* The sysinfo structure was already initialized */
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if (state.sysinfo.board_type)
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return 0;
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memset(&(state.sysinfo), 0x0, sizeof(state.sysinfo));
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state.sysinfo.phy_mem_desc_ptr = phy_mem_desc_ptr;
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state.sysinfo.board_type = board_type;
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state.sysinfo.board_rev_major = board_rev_major;
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state.sysinfo.board_rev_minor = board_rev_minor;
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state.sysinfo.cpu_clock_hz = cpu_clock_hz;
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return 1;
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}
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