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 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 "cfe.h" 49#include "cfe_mem.h" 50#include "lib_arena.h" 51 52#include "initdata.h" 53 54#define _NOPROTOS_ 55#include "cfe_boot.h" 56#undef _NOPROTOS_ 57 58/* ********************************************************************* 59 * Constants 60 ********************************************************************* */ 61 62 63#define MEG (1024*1024) 64#define KB 1024 65#define PAGESIZE 4096 66#define CFE_BOOTAREA_SIZE (256*KB) 67#define CFE_BOOTAREA_ADDR 0x20000000 68 69 70/* ********************************************************************* 71 * Globals 72 ********************************************************************* */ 73 74extern arena_t cfe_arena; 75uint64_t *cfe_pagetable = NULL; 76 77extern void CPUCFG_PAGETBLINIT(uint64_t *ptaddr,unsigned int ptstart); 78 79void cfe_bootarea_init(void); 80extern void _setcontext(int64_t); 81 82 83/* ********************************************************************* 84 * CFE_BOOTAREA_INIT() 85 * 86 * Initialize the page table and map our boot program area. 87 * 88 * Input parameters: 89 * nothing 90 * 91 * Return value: 92 * nothing 93 ********************************************************************* */ 94 95void cfe_bootarea_init(void) 96{ 97 unsigned char *pte; 98 int64_t pte_int; 99 unsigned int addr = 16*MEG; 100 unsigned int topmem; 101 unsigned int topcfe; 102 unsigned int botcfe; 103 unsigned int beforecfe; 104 unsigned int aftercfe; 105 106 /* 107 * Calculate the location where the boot area will 108 * live. It lives either above or below the 109 * firmware, depending on where there's more space. 110 */ 111 112 /* 113 * The firmware will always be loaded in the first 114 * 256M. Calculate the top of that region. The bottom 115 * of that region is always the beginning of our 116 * data segment. 117 */ 118 if (mem_totalsize > (uint64_t)256) { 119 topmem = 256*MEG; 120 } 121 else { 122 topmem = (unsigned int) (mem_totalsize << 20); 123 } 124 botcfe = (unsigned int) K1_TO_PHYS(mem_bottomofmem); 125 topcfe = (unsigned int) K1_TO_PHYS(mem_topofmem); 126 127 beforecfe = botcfe; 128 aftercfe = topmem-topcfe; 129 130 if (beforecfe > aftercfe) { 131 botcfe -= (PAGESIZE-1); 132 botcfe &= ~(PAGESIZE-1); /* round down to page boundary */ 133 addr = botcfe - CFE_BOOTAREA_SIZE; /* this is the address */ 134 } 135 else { 136 topcfe += (PAGESIZE-1); /* round *up* to a page address */ 137 topcfe &= ~(PAGESIZE-1); 138 addr = topcfe; 139 } 140 141 mem_bootarea_start = addr; 142 mem_bootarea_size = CFE_BOOTAREA_SIZE; 143 144 /* 145 * Allocate the page table 146 */ 147 148 pte = KMALLOC(1024,1024); 149 150#ifdef __long64 151 pte_int = (int64_t) pte; 152#else 153 pte_int = (int64_t) ((int) pte); 154#endif 155 156 /* 157 * Set the CP0 CONTEXT register to point at the page table 158 */ 159 160 pte_int <<= 13; 161 cfe_pagetable = (uint64_t *) pte; 162 163 _setcontext(pte_int); 164 165 166 /* 167 * Initialize page table entries 168 */ 169 170 CPUCFG_PAGETBLINIT(cfe_pagetable,addr); 171 172 173} 174 175