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/***********************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 .
*/
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# include <linux/module.h>
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# 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 ) ;
}
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EXPORT_SYMBOL ( cvmx_sysinfo_get ) ;
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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 .
*
* Locking ( if required ) must be handled outside of this
* function
*
* @ phy_mem_desc_ptr :
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* Pointer to global physical memory descriptor
* ( bootmem descriptor ) @ board_type : Octeon board
* type enumeration
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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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*
* Returns 0 : Failure
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* 1 : success
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*/
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 ;
}
