arch/powerpc/cpu/mpc8xxx/law.c

   1 /*
   2  * Copyright 2008-2011 Freescale Semiconductor, Inc.
   3  *
   4  * (C) Copyright 2000
   5  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <linux/compiler.h>
  12 #include <asm/fsl_law.h>
  13 #include <asm/io.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 #define FSL_HW_NUM_LAWS CONFIG_SYS_FSL_NUM_LAWS
  18
  19 #ifdef CONFIG_FSL_CORENET
  20 #define LAW_BASE (CONFIG_SYS_FSL_CORENET_CCM_ADDR)
  21 #define LAWAR_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawar)
  22 #define LAWBARH_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawbarh)
  23 #define LAWBARL_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawbarl)
  24 #define LAWBAR_SHIFT 0
  25 #else
  26 #define LAW_BASE (CONFIG_SYS_IMMR + 0xc08)
  27 #define LAWAR_ADDR(x) ((u32 *)LAW_BASE + 8 * x + 2)
  28 #define LAWBAR_ADDR(x) ((u32 *)LAW_BASE + 8 * x)
  29 #define LAWBAR_SHIFT 12
  30 #endif
  31
  32
  33 static inline phys_addr_t get_law_base_addr(int idx)
  34 {
  35 #ifdef CONFIG_FSL_CORENET
  36         return (phys_addr_t)
  37                 ((u64)in_be32(LAWBARH_ADDR(idx)) << 32) |
  38                 in_be32(LAWBARL_ADDR(idx));
  39 #else
  40         return (phys_addr_t)in_be32(LAWBAR_ADDR(idx)) << LAWBAR_SHIFT;
  41 #endif
  42 }
  43
  44 static inline void set_law_base_addr(int idx, phys_addr_t addr)
  45 {
  46 #ifdef CONFIG_FSL_CORENET
  47         out_be32(LAWBARL_ADDR(idx), addr & 0xffffffff);
  48         out_be32(LAWBARH_ADDR(idx), (u64)addr >> 32);
  49 #else
  50         out_be32(LAWBAR_ADDR(idx), addr >> LAWBAR_SHIFT);
  51 #endif
  52 }
  53
  54 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
  55 {
  56         gd->arch.used_laws |= (1 << idx);
  57
  58         out_be32(LAWAR_ADDR(idx), 0);
  59         set_law_base_addr(idx, addr);
  60         out_be32(LAWAR_ADDR(idx), LAW_EN | ((u32)id << 20) | (u32)sz);
  61
  62         /* Read back so that we sync the writes */
  63         in_be32(LAWAR_ADDR(idx));
  64 }
  65
  66 void disable_law(u8 idx)
  67 {
  68         gd->arch.used_laws &= ~(1 << idx);
  69
  70         out_be32(LAWAR_ADDR(idx), 0);
  71         set_law_base_addr(idx, 0);
  72
  73         /* Read back so that we sync the writes */
  74         in_be32(LAWAR_ADDR(idx));
  75
  76         return;
  77 }
  78
  79 #if !defined(CONFIG_NAND_SPL) && \
  80         (!defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL_INIT_MINIMAL))
  81 static int get_law_entry(u8 i, struct law_entry *e)
  82 {
  83         u32 lawar;
  84
  85         lawar = in_be32(LAWAR_ADDR(i));
  86
  87         if (!(lawar & LAW_EN))
  88                 return 0;
  89
  90         e->addr = get_law_base_addr(i);
  91         e->size = lawar & 0x3f;
  92         e->trgt_id = (lawar >> 20) & 0xff;
  93
  94         return 1;
  95 }
  96 #endif
  97
  98 int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
  99 {
 100         u32 idx = ffz(gd->arch.used_laws);
 101
 102         if (idx >= FSL_HW_NUM_LAWS)
 103                 return -1;
 104
 105         set_law(idx, addr, sz, id);
 106
 107         return idx;
 108 }
 109
 110 #if !defined(CONFIG_NAND_SPL) && \
 111         (!defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL_INIT_MINIMAL))
 112 int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
 113 {
 114         u32 idx;
 115
 116         /* we have no LAWs free */
 117         if (gd->arch.used_laws == -1)
 118                 return -1;
 119
 120         /* grab the last free law */
 121         idx = __ilog2(~(gd->arch.used_laws));
 122
 123         if (idx >= FSL_HW_NUM_LAWS)
 124                 return -1;
 125
 126         set_law(idx, addr, sz, id);
 127
 128         return idx;
 129 }
 130
 131 struct law_entry find_law(phys_addr_t addr)
 132 {
 133         struct law_entry entry;
 134         int i;
 135
 136         entry.index = -1;
 137         entry.addr = 0;
 138         entry.size = 0;
 139         entry.trgt_id = 0;
 140
 141         for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
 142                 u64 upper;
 143
 144                 if (!get_law_entry(i, &entry))
 145                         continue;
 146
 147                 upper = entry.addr + (2ull << entry.size);
 148                 if ((addr >= entry.addr) && (addr < upper)) {
 149                         entry.index = i;
 150                         break;
 151                 }
 152         }
 153
 154         return entry;
 155 }
 156
 157 void print_laws(void)
 158 {
 159         int i;
 160         u32 lawar;
 161
 162         printf("\nLocal Access Window Configuration\n");
 163         for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
 164                 lawar = in_be32(LAWAR_ADDR(i));
 165 #ifdef CONFIG_FSL_CORENET
 166                 printf("LAWBARH%02d: 0x%08x LAWBARL%02d: 0x%08x",
 167                        i, in_be32(LAWBARH_ADDR(i)),
 168                        i, in_be32(LAWBARL_ADDR(i)));
 169 #else
 170                 printf("LAWBAR%02d: 0x%08x", i, in_be32(LAWBAR_ADDR(i)));
 171 #endif
 172                 printf(" LAWAR%02d: 0x%08x\n", i, lawar);
 173                 printf("\t(EN: %d TGT: 0x%02x SIZE: ",
 174                        (lawar & LAW_EN) ? 1 : 0, (lawar >> 20) & 0xff);
 175                 print_size(lawar_size(lawar), ")\n");
 176         }
 177
 178         return;
 179 }
 180
 181 /* use up to 2 LAWs for DDR, used the last available LAWs */
 182 int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
 183 {
 184         u64 start_align, law_sz;
 185         int law_sz_enc;
 186
 187         if (start == 0)
 188                 start_align = 1ull << (LAW_SIZE_32G + 1);
 189         else
 190                 start_align = 1ull << (ffs64(start) - 1);
 191         law_sz = min(start_align, sz);
 192         law_sz_enc = __ilog2_u64(law_sz) - 1;
 193
 194         if (set_last_law(start, law_sz_enc, id) < 0)
 195                 return -1;
 196
 197         /* recalculate size based on what was actually covered by the law */
 198         law_sz = 1ull << __ilog2_u64(law_sz);
 199
 200         /* do we still have anything to map */
 201         sz = sz - law_sz;
 202         if (sz) {
 203                 start += law_sz;
 204
 205                 start_align = 1ull << (ffs64(start) - 1);
 206                 law_sz = min(start_align, sz);
 207                 law_sz_enc = __ilog2_u64(law_sz) - 1;
 208
 209                 if (set_last_law(start, law_sz_enc, id) < 0)
 210                         return -1;
 211         } else {
 212                 return 0;
 213         }
 214
 215         /* do we still have anything to map */
 216         sz = sz - law_sz;
 217         if (sz)
 218                 return 1;
 219
 220         return 0;
 221 }
 222 #endif /* not SPL */
 223
 224 void init_laws(void)
 225 {
 226         int i;
 227
 228 #if FSL_HW_NUM_LAWS < 32
 229         gd->arch.used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
 230 #elif FSL_HW_NUM_LAWS == 32
 231         gd->arch.used_laws = 0;
 232 #else
 233 #error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
 234 #endif
 235
 236         /*
 237          * Any LAWs that were set up before we booted assume they are meant to
 238          * be around and mark them used.
 239          */
 240         for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
 241                 u32 lawar = in_be32(LAWAR_ADDR(i));
 242
 243                 if (lawar & LAW_EN)
 244                         gd->arch.used_laws |= (1 << i);
 245         }
 246
 247 #if (defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)) || \
 248         (defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD))
 249         /*
 250          * in SPL boot we've already parsed the law_table and setup those LAWs
 251          * so don't do it again.
 252          */
 253         return;
 254 #endif
 255
 256         for (i = 0; i < num_law_entries; i++) {
 257                 if (law_table[i].index == -1)
 258                         set_next_law(law_table[i].addr, law_table[i].size,
 259                                         law_table[i].trgt_id);
 260                 else
 261                         set_law(law_table[i].index, law_table[i].addr,
 262                                 law_table[i].size, law_table[i].trgt_id);
 263         }
 264
 265 #ifdef CONFIG_SRIO_PCIE_BOOT_SLAVE
 266         /* check RCW to get which port is used for boot */
 267         ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
 268         u32 bootloc = in_be32(&gur->rcwsr[6]);
 269         /*
 270          * in SRIO or PCIE boot we need to set specail LAWs for
 271          * SRIO or PCIE interfaces.
 272          */
 273         switch ((bootloc & FSL_CORENET_RCWSR6_BOOT_LOC) >> 23) {
 274         case 0x0: /* boot from PCIE1 */
 275                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_SLAVE_ADDR_PHYS,
 276                                 LAW_SIZE_1M,
 277                                 LAW_TRGT_IF_PCIE_1);
 278                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_UCODE_ENV_ADDR_PHYS,
 279                                 LAW_SIZE_1M,
 280                                 LAW_TRGT_IF_PCIE_1);
 281                 break;
 282         case 0x1: /* boot from PCIE2 */
 283                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_SLAVE_ADDR_PHYS,
 284                                 LAW_SIZE_1M,
 285                                 LAW_TRGT_IF_PCIE_2);
 286                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_UCODE_ENV_ADDR_PHYS,
 287                                 LAW_SIZE_1M,
 288                                 LAW_TRGT_IF_PCIE_2);
 289                 break;
 290         case 0x2: /* boot from PCIE3 */
 291                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_SLAVE_ADDR_PHYS,
 292                                 LAW_SIZE_1M,
 293                                 LAW_TRGT_IF_PCIE_3);
 294                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_UCODE_ENV_ADDR_PHYS,
 295                                 LAW_SIZE_1M,
 296                                 LAW_TRGT_IF_PCIE_3);
 297                 break;
 298         case 0x8: /* boot from SRIO1 */
 299                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_SLAVE_ADDR_PHYS,
 300                                 LAW_SIZE_1M,
 301                                 LAW_TRGT_IF_RIO_1);
 302                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_UCODE_ENV_ADDR_PHYS,
 303                                 LAW_SIZE_1M,
 304                                 LAW_TRGT_IF_RIO_1);
 305                 break;
 306         case 0x9: /* boot from SRIO2 */
 307                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_SLAVE_ADDR_PHYS,
 308                                 LAW_SIZE_1M,
 309                                 LAW_TRGT_IF_RIO_2);
 310                 set_next_law(CONFIG_SYS_SRIO_PCIE_BOOT_UCODE_ENV_ADDR_PHYS,
 311                                 LAW_SIZE_1M,
 312                                 LAW_TRGT_IF_RIO_2);
 313                 break;
 314         default:
 315                 break;
 316         }
 317 #endif
 318
 319         return ;
 320 }