1/*  *********************************************************************
2    *  Broadcom Common Firmware Environment (CFE)
3    *
4    *  Physical Memory (arena) manager		File: sb1250_arena.c
5    *
6    *  This module describes the physical memory available to the
7    *  firmware.
8    *
9    *  Author:  Mitch Lichtenberg (mpl@broadcom.com)
10    *
11    *********************************************************************
12    *
13    *  Copyright 2000,2001,2002,2003
14    *  Broadcom Corporation. All rights reserved.
15    *
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.
22    *
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.
26    *
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.
32    *
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    ********************************************************************* */
47
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"
54
55#include "cfe_error.h"
56
57#include "cfe.h"
58#include "cfe_mem.h"
59
60#include "initdata.h"
61
62#define _NOPROTOS_
63#include "cfe_boot.h"
64#undef _NOPROTOS_
65
66#include "cpu_config.h"
67
68#include "addrspace.h"
69
70/*  *********************************************************************
71    *  Constants
72    ********************************************************************* */
73
74
75#define MEG	(1024*1024)
76#define KB      1024
77#define PAGESIZE 4096
78#define CFE_BOOTAREA_SIZE (256*KB)
79#define CFE_BOOTAREA_ADDR 0x20000000
80
81
82/*  *********************************************************************
83    *  Globals
84    ********************************************************************* */
85
86extern arena_t cfe_arena;
87uint64_t *cfe_pagetable = NULL;
88
89extern void CPUCFG_PAGETBLINIT(uint64_t *ptaddr,unsigned int ptstart);
90
91void cfe_bootarea_init(void);
92extern void _setcontext(int64_t);
93
94
95/*  *********************************************************************
96    *  CFE_BOOTAREA_INIT()
97    *
98    *  Initialize the page table and map our boot program area.
99    *
100    *  Input parameters:
101    *  	   nothing
102    *
103    *  Return value:
104    *  	   nothing
105    ********************************************************************* */
106
107void cfe_bootarea_init(void)
108{
109    unsigned char *pte;
110    int64_t pte_int;
111    unsigned int addr = 16*MEG;
112    unsigned int topmem;
113    unsigned int topcfe;
114    unsigned int botcfe;
115    unsigned int beforecfe;
116    unsigned int aftercfe;
117
118    /*
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.
122     */
123
124    /*
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
128     * data segment.
129     */
130    if (mem_totalsize > (uint64_t)(256*1024)) {
131	topmem = 256*MEG;
132	}
133    else {
134	topmem = (unsigned int) (mem_totalsize << 10);
135	}
136    botcfe = (unsigned int) K1_TO_PHYS(mem_bottomofmem);
137    topcfe = (unsigned int) K1_TO_PHYS(mem_topofmem);
138
139    beforecfe = botcfe;
140    aftercfe = topmem-topcfe;
141
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 */
146	}
147    else {
148	topcfe += (PAGESIZE-1);		/* round *up* to a page address */
149	topcfe &= ~(PAGESIZE-1);
150	addr = topcfe;
151	}
152
153    mem_bootarea_start = addr;
154    mem_bootarea_size = CFE_BOOTAREA_SIZE;
155
156    /*
157     * Allocate the page table
158     */
159
160    pte = KMALLOC(1024,1024);
161
162#ifdef __long64
163    pte_int = (int64_t) pte;
164#else
165    pte_int = (int64_t) ((int) pte);
166#endif
167
168    /*
169     * Set the CP0 CONTEXT register to point at the page table
170     */
171
172    pte_int <<= 13;
173    cfe_pagetable = (uint64_t *) pte;
174
175    _setcontext(pte_int);
176
177
178    /*
179     * Initialize page table entries
180     */
181
182    CPUCFG_PAGETBLINIT(cfe_pagetable,addr);
183
184
185}
186
187