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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Physical Memory (arena) manager File: sb1250_arena.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"
#include "addrspace.h"
/* *********************************************************************
* Constants
********************************************************************* */
#define MEG (1024*1024)
#define KB 1024
#define PAGESIZE 4096
#define CFE_BOOTAREA_SIZE (256*KB)
#define CFE_BOOTAREA_ADDR 0x20000000
/* *********************************************************************
* Globals
********************************************************************* */
extern arena_t cfe_arena;
uint64_t *cfe_pagetable = NULL;
extern void CPUCFG_PAGETBLINIT(uint64_t *ptaddr,unsigned int ptstart);
void cfe_bootarea_init(void);
extern void _setcontext(int64_t);
/* *********************************************************************
* CFE_BOOTAREA_INIT()
*
* Initialize the page table and map our boot program area.
*
* Input parameters:
* nothing
*
* Return value:
* nothing
********************************************************************* */
void cfe_bootarea_init(void)
{
unsigned char *pte;
int64_t pte_int;
unsigned int addr = 16*MEG;
unsigned int topmem;
unsigned int topcfe;
unsigned int botcfe;
unsigned int beforecfe;
unsigned int aftercfe;
/*
* Calculate the location where the boot area will
* live. It lives either above or below the
* firmware, depending on where there's more space.
*/
/*
* The firmware will always be loaded in the first
* 256M. Calculate the top of that region. The bottom
* of that region is always the beginning of our
* data segment.
*/
if (mem_totalsize > (uint64_t)256) {
topmem = 256*MEG;
}
else {
topmem = (unsigned int) (mem_totalsize << 20);
}
botcfe = (unsigned int) K1_TO_PHYS(mem_bottomofmem);
topcfe = (unsigned int) K1_TO_PHYS(mem_topofmem);
beforecfe = botcfe;
aftercfe = topmem-topcfe;
if (beforecfe > aftercfe) {
botcfe -= (PAGESIZE-1);
botcfe &= ~(PAGESIZE-1); /* round down to page boundary */
addr = botcfe - CFE_BOOTAREA_SIZE; /* this is the address */
}
else {
topcfe += (PAGESIZE-1); /* round *up* to a page address */
topcfe &= ~(PAGESIZE-1);
addr = topcfe;
}
mem_bootarea_start = addr;
mem_bootarea_size = CFE_BOOTAREA_SIZE;
/*
* Allocate the page table
*/
pte = KMALLOC(1024,1024);
#ifdef __long64
pte_int = (int64_t) pte;
#else
pte_int = (int64_t) ((int) pte);
#endif
/*
* Set the CP0 CONTEXT register to point at the page table
*/
pte_int <<= 13;
cfe_pagetable = (uint64_t *) pte;
_setcontext(pte_int);
/*
* Initialize page table entries
*/
CPUCFG_PAGETBLINIT(cfe_pagetable,addr);
}
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