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