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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Physical Memory (arena) manager File: cfe_mem.c
*
* This module describes the physical memory available to the
* firmware.
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
#include "lib_types.h"
#include "lib_string.h"
#include "lib_queue.h"
#include "lib_malloc.h"
#include "lib_printf.h"
#include "lib_arena.h"
#include "cfe_error.h"
#include "cfe.h"
#include "cfe_mem.h"
#include "initdata.h"
#define _NOPROTOS_
#include "cfe_boot.h"
#undef _NOPROTOS_
#include "cpu_config.h" /* for definition of CPUCFG_ARENAINIT */
#include "addrspace.h" /* for macros dealing with addresses */
/* *********************************************************************
* Macros
********************************************************************* */
#define ARENA_RANGE(bottom,top,type) arena_markrange(&cfe_arena,(uint64_t)(bottom), \
(uint64_t)(top)-(uint64_t)bottom+1,(type),NULL)
#define MEG (1024*1024)
#define KB 1024
#define PAGESIZE 4096
#define CFE_BOOTAREA_SIZE (256*KB)
#define CFE_BOOTAREA_ADDR 0x20000000
/* *********************************************************************
* Globals
********************************************************************* */
arena_t cfe_arena;
extern void _setcontext(int64_t);
unsigned int mem_bootarea_start;
unsigned int mem_bootarea_size;
extern void CPUCFG_ARENAINIT(void);
extern void cfe_bootarea_init(void);
extern void CPUCFG_PAGETBLINIT(uint64_t *ptaddr,unsigned int ptstart);
/* *********************************************************************
* cfe_arena_init()
*
* Create the initial map of physical memory
*
* Input parameters:
* nothing
*
* Return value:
* nothing
********************************************************************* */
void cfe_arena_init(void)
{
uint64_t memlo,memhi;
/*
* This macro expands via cpu_config.h to an appropriate function
* name for creating an empty arena appropriately for our CPU
*/
CPUCFG_ARENAINIT();
/*
* Round the area used by the firmware to a page boundary and
* mark it in use
*/
memhi = PHYSADDR((mem_topofmem + 4095) & ~4095);
memlo = PHYSADDR(mem_bottomofmem) & ~4095;
ARENA_RANGE(memlo,memhi-1,MEMTYPE_DRAM_USEDBYFIRMWARE);
/*
* Create the initial page table
*/
cfe_bootarea_init();
}
/* *********************************************************************
* cfe_arena_enum(idx,type,start,size)
*
* Enumerate available memory. This is called by the user
* API dispatcher so that operating systems can determine what
* memory regions are available to them.
*
* Input parameters:
* idx - index. Start at zero and increment until an error
* is returned.
* type,start,size: pointers to variables to receive the
* arena entry's information
* allrecs - true to retrieve all records, false to retrieve
* only available DRAM
*
* Return value:
* 0 if ok
* CFE_ERR_NOMORE if idx is beyond the last entry
********************************************************************* */
int cfe_arena_enum(int idx,int *type,uint64_t *start,uint64_t *size,int allrecs)
{
arena_node_t *node;
queue_t *qb;
arena_t *arena = &cfe_arena;
for (qb = (arena->arena_list.q_next); qb != &(arena->arena_list);
qb = qb->q_next) {
node = (arena_node_t *) qb;
if (allrecs || (!allrecs && (node->an_type == MEMTYPE_DRAM_AVAILABLE))) {
if (idx == 0) {
*type = node->an_type;
*start = node->an_address;
*size = node->an_length;
return 0;
}
idx--;
}
}
return CFE_ERR_NOMORE;
}
/* *********************************************************************
* cfe_arena_loadcheck(start,size)
*
* Determine if the specified memory area is within the available
* DRAM. This is used while loading executables to be sure we
* don't trash the firmware.
*
* Input parameters:
* start - starting physical address
* size - size of requested region
*
* Return value:
* true - ok to copy memory here
* false - not ok, memory overlaps firmware
********************************************************************* */
int cfe_arena_loadcheck(uintptr_t start,unsigned int size)
{
arena_node_t *node;
queue_t *qb;
arena_t *arena = &cfe_arena;
/*
* If the address is in our boot area, it's okay
* for it to be a virtual address.
*/
if ((start >= BOOT_START_ADDRESS) &&
((start+size) <= (BOOT_START_ADDRESS+BOOT_AREA_SIZE))) {
return TRUE;
}
/*
* Otherwise, make a physical address.
*/
start = PHYSADDR(start);
/*
* Because all of the arena nodes of the same type are
* coalesced together, all we need to do is determine if the
* requested region is entirely within an arena node,
* so there's no need to look for things that span nodes.
*/
for (qb = (arena->arena_list.q_next); qb != &(arena->arena_list);
qb = qb->q_next) {
node = (arena_node_t *) qb;
/* If the memory is available, the region is OK. */
if ((start >= node->an_address) &&
((start+size) <= (node->an_address+node->an_length)) &&
(node->an_type == MEMTYPE_DRAM_AVAILABLE)) {
return TRUE;
}
}
/*
* Otherwise, it's not. We could go through the arena again and
* look for regions of other types that intersect the requested
* region, to get a more detailed error, but this'll do.
*/
return FALSE;
}
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