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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | /* * Copyright 2008 Freescale Semiconductor, Inc. * * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <asm/fsl_law.h> #include <asm/io.h> DECLARE_GLOBAL_DATA_PTR; #define LAWAR_EN 0x80000000 /* number of LAWs in the hw implementation */ #if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \ defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555) #define FSL_HW_NUM_LAWS 8 #elif defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544) || \ defined(CONFIG_MPC8568) || \ defined(CONFIG_MPC8641) || defined(CONFIG_MPC8610) #define FSL_HW_NUM_LAWS 10 #elif defined(CONFIG_MPC8572) #define FSL_HW_NUM_LAWS 12 #else #error FSL_HW_NUM_LAWS not defined for this platform #endif void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id) { volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08); volatile u32 *lawbar = base + 8 * idx; volatile u32 *lawar = base + 8 * idx + 2; gd->used_laws |= (1 << idx); out_be32(lawbar, addr >> 12); out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz); return ; } int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id) { u32 idx = ffz(gd->used_laws); if (idx >= FSL_HW_NUM_LAWS) return -1; set_law(idx, addr, sz, id); return idx; } int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id) { u32 idx; /* we have no LAWs free */ if (gd->used_laws == -1) return -1; /* grab the last free law */ idx = __ilog2(~(gd->used_laws)); if (idx >= FSL_HW_NUM_LAWS) return -1; set_law(idx, addr, sz, id); return idx; } void disable_law(u8 idx) { volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08); volatile u32 *lawbar = base + 8 * idx; volatile u32 *lawar = base + 8 * idx + 2; gd->used_laws &= ~(1 << idx); out_be32(lawar, 0); out_be32(lawbar, 0); return; } void print_laws(void) { volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08); volatile u32 *lawbar = base; volatile u32 *lawar = base + 2; int i; printf("\nLocal Access Window Configuration\n"); for(i = 0; i < FSL_HW_NUM_LAWS; i++) { printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n", i, in_be32(lawbar), i, in_be32(lawar)); lawbar += 8; lawar += 8; } return; } void init_laws(void) { int i; gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1); for (i = 0; i < num_law_entries; i++) { if (law_table[i].index == -1) set_next_law(law_table[i].addr, law_table[i].size, law_table[i].trgt_id); else set_law(law_table[i].index, law_table[i].addr, law_table[i].size, law_table[i].trgt_id); } return ; } |