1 /* *********************************************************************
2 * Broadcom Common Firmware Environment (CFE)
4 * Physical Memory (arena) manager File: sb1250_arena.c
6 * This module describes the physical memory available to the
9 * Author: Mitch Lichtenberg (mpl@broadcom.com)
11 *********************************************************************
13 * Copyright 2000,2001,2002,2003
14 * Broadcom Corporation. All rights reserved.
16 * This software is furnished under license and may be used and
17 * copied only in accordance with the following terms and
18 * conditions. Subject to these conditions, you may download,
19 * copy, install, use, modify and distribute modified or unmodified
20 * copies of this software in source and/or binary form. No title
21 * or ownership is transferred hereby.
23 * 1) Any source code used, modified or distributed must reproduce
24 * and retain this copyright notice and list of conditions
25 * as they appear in the source file.
27 * 2) No right is granted to use any trade name, trademark, or
28 * logo of Broadcom Corporation. The "Broadcom Corporation"
29 * name may not be used to endorse or promote products derived
30 * from this software without the prior written permission of
31 * Broadcom Corporation.
33 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
34 * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
35 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
36 * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
37 * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
38 * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
39 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
40 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
41 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
42 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
43 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
44 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
45 * THE POSSIBILITY OF SUCH DAMAGE.
46 ********************************************************************* */
48 #include "lib_types.h"
49 #include "lib_string.h"
50 #include "lib_queue.h"
51 #include "lib_malloc.h"
52 #include "lib_printf.h"
53 #include "lib_arena.h"
55 #include "cfe_error.h"
66 #include "cpu_config.h"
68 #include "addrspace.h"
70 /* *********************************************************************
72 ********************************************************************* */
75 #define MEG (1024*1024)
78 #define CFE_BOOTAREA_SIZE (256*KB)
79 #define CFE_BOOTAREA_ADDR 0x20000000
82 /* *********************************************************************
84 ********************************************************************* */
86 extern arena_t cfe_arena
;
87 uint64_t *cfe_pagetable
= NULL
;
89 extern void CPUCFG_PAGETBLINIT(uint64_t *ptaddr
,unsigned int ptstart
);
91 void cfe_bootarea_init(void);
92 extern void _setcontext(int64_t);
95 /* *********************************************************************
98 * Initialize the page table and map our boot program area.
105 ********************************************************************* */
107 void cfe_bootarea_init(void)
111 unsigned int addr
= 16*MEG
;
115 unsigned int beforecfe
;
116 unsigned int aftercfe
;
119 * Calculate the location where the boot area will
120 * live. It lives either above or below the
121 * firmware, depending on where there's more space.
125 * The firmware will always be loaded in the first
126 * 256M. Calculate the top of that region. The bottom
127 * of that region is always the beginning of our
130 if (mem_totalsize
> (uint64_t)(256*1024)) {
134 topmem
= (unsigned int) (mem_totalsize
<< 10);
136 botcfe
= (unsigned int) K1_TO_PHYS(mem_bottomofmem
);
137 topcfe
= (unsigned int) K1_TO_PHYS(mem_topofmem
);
140 aftercfe
= topmem
-topcfe
;
142 if (beforecfe
> aftercfe
) {
143 botcfe
-= (PAGESIZE
-1);
144 botcfe
&= ~(PAGESIZE
-1); /* round down to page boundary */
145 addr
= botcfe
- CFE_BOOTAREA_SIZE
; /* this is the address */
148 topcfe
+= (PAGESIZE
-1); /* round *up* to a page address */
149 topcfe
&= ~(PAGESIZE
-1);
153 mem_bootarea_start
= addr
;
154 mem_bootarea_size
= CFE_BOOTAREA_SIZE
;
157 * Allocate the page table
160 pte
= KMALLOC(1024,1024);
163 pte_int
= (int64_t) pte
;
165 pte_int
= (int64_t) ((int) pte
);
169 * Set the CP0 CONTEXT register to point at the page table
173 cfe_pagetable
= (uint64_t *) pte
;
175 _setcontext(pte_int
);
179 * Initialize page table entries
182 CPUCFG_PAGETBLINIT(cfe_pagetable
,addr
);