include/fsl_ddr_sdram.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright 2008-2016 Freescale Semiconductor, Inc.
   4  * Copyright 2017-2018 NXP Semiconductor
   5  */
   6
   7 #ifndef FSL_DDR_MEMCTL_H
   8 #define FSL_DDR_MEMCTL_H
   9
  10 /*
  11  * Pick a basic DDR Technology.
  12  */
  13 #include <ddr_spd.h>
  14 #include <fsl_ddrc_version.h>
  15
  16 #define SDRAM_TYPE_DDR1         2
  17 #define SDRAM_TYPE_DDR2         3
  18 #define SDRAM_TYPE_LPDDR1       6
  19 #define SDRAM_TYPE_DDR3         7
  20 #define SDRAM_TYPE_DDR4         5
  21
  22 #define DDR_BL4         4       /* burst length 4 */
  23 #define DDR_BC4         DDR_BL4 /* burst chop for ddr3 */
  24 #define DDR_OTF         6       /* on-the-fly BC4 and BL8 */
  25 #define DDR_BL8         8       /* burst length 8 */
  26
  27 #define DDR3_RTT_OFF            0
  28 #define DDR3_RTT_60_OHM         1 /* RTT_Nom = RZQ/4 */
  29 #define DDR3_RTT_120_OHM        2 /* RTT_Nom = RZQ/2 */
  30 #define DDR3_RTT_40_OHM         3 /* RTT_Nom = RZQ/6 */
  31 #define DDR3_RTT_20_OHM         4 /* RTT_Nom = RZQ/12 */
  32 #define DDR3_RTT_30_OHM         5 /* RTT_Nom = RZQ/8 */
  33
  34 #define DDR4_RTT_OFF            0
  35 #define DDR4_RTT_60_OHM         1       /* RZQ/4 */
  36 #define DDR4_RTT_120_OHM        2       /* RZQ/2 */
  37 #define DDR4_RTT_40_OHM         3       /* RZQ/6 */
  38 #define DDR4_RTT_240_OHM        4       /* RZQ/1 */
  39 #define DDR4_RTT_48_OHM         5       /* RZQ/5 */
  40 #define DDR4_RTT_80_OHM         6       /* RZQ/3 */
  41 #define DDR4_RTT_34_OHM         7       /* RZQ/7 */
  42
  43 #define DDR2_RTT_OFF            0
  44 #define DDR2_RTT_75_OHM         1
  45 #define DDR2_RTT_150_OHM        2
  46 #define DDR2_RTT_50_OHM         3
  47
  48 #if defined(CONFIG_SYS_FSL_DDR1)
  49 #define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR        (1)
  50 typedef ddr1_spd_eeprom_t generic_spd_eeprom_t;
  51 #ifndef CONFIG_FSL_SDRAM_TYPE
  52 #define CONFIG_FSL_SDRAM_TYPE   SDRAM_TYPE_DDR1
  53 #endif
  54 #elif defined(CONFIG_SYS_FSL_DDR2)
  55 #define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR        (3)
  56 typedef ddr2_spd_eeprom_t generic_spd_eeprom_t;
  57 #ifndef CONFIG_FSL_SDRAM_TYPE
  58 #define CONFIG_FSL_SDRAM_TYPE   SDRAM_TYPE_DDR2
  59 #endif
  60 #elif defined(CONFIG_SYS_FSL_DDR3)
  61 typedef ddr3_spd_eeprom_t generic_spd_eeprom_t;
  62 #ifndef CONFIG_FSL_SDRAM_TYPE
  63 #define CONFIG_FSL_SDRAM_TYPE   SDRAM_TYPE_DDR3
  64 #endif
  65 #elif defined(CONFIG_SYS_FSL_DDR4)
  66 #define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR        (3)     /* FIXME */
  67 typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t;
  68 #ifndef CONFIG_FSL_SDRAM_TYPE
  69 #define CONFIG_FSL_SDRAM_TYPE   SDRAM_TYPE_DDR4
  70 #endif
  71 #endif  /* #if defined(CONFIG_SYS_FSL_DDR1) */
  72
  73 #define FSL_DDR_ODT_NEVER               0x0
  74 #define FSL_DDR_ODT_CS                  0x1
  75 #define FSL_DDR_ODT_ALL_OTHER_CS        0x2
  76 #define FSL_DDR_ODT_OTHER_DIMM          0x3
  77 #define FSL_DDR_ODT_ALL                 0x4
  78 #define FSL_DDR_ODT_SAME_DIMM           0x5
  79 #define FSL_DDR_ODT_CS_AND_OTHER_DIMM   0x6
  80 #define FSL_DDR_ODT_OTHER_CS_ONSAMEDIMM 0x7
  81
  82 /* define bank(chip select) interleaving mode */
  83 #define FSL_DDR_CS0_CS1                 0x40
  84 #define FSL_DDR_CS2_CS3                 0x20
  85 #define FSL_DDR_CS0_CS1_AND_CS2_CS3     (FSL_DDR_CS0_CS1 | FSL_DDR_CS2_CS3)
  86 #define FSL_DDR_CS0_CS1_CS2_CS3         (FSL_DDR_CS0_CS1_AND_CS2_CS3 | 0x04)
  87
  88 /* define memory controller interleaving mode */
  89 #define FSL_DDR_CACHE_LINE_INTERLEAVING 0x0
  90 #define FSL_DDR_PAGE_INTERLEAVING       0x1
  91 #define FSL_DDR_BANK_INTERLEAVING       0x2
  92 #define FSL_DDR_SUPERBANK_INTERLEAVING  0x3
  93 #define FSL_DDR_256B_INTERLEAVING       0x8
  94 #define FSL_DDR_3WAY_1KB_INTERLEAVING   0xA
  95 #define FSL_DDR_3WAY_4KB_INTERLEAVING   0xC
  96 #define FSL_DDR_3WAY_8KB_INTERLEAVING   0xD
  97 /* placeholder for 4-way interleaving */
  98 #define FSL_DDR_4WAY_1KB_INTERLEAVING   0x1A
  99 #define FSL_DDR_4WAY_4KB_INTERLEAVING   0x1C
 100 #define FSL_DDR_4WAY_8KB_INTERLEAVING   0x1D
 101
 102 #define SDRAM_CS_CONFIG_EN              0x80000000
 103
 104 /* DDR_SDRAM_CFG - DDR SDRAM Control Configuration
 105  */
 106 #define SDRAM_CFG_MEM_EN                0x80000000
 107 #define SDRAM_CFG_SREN                  0x40000000
 108 #define SDRAM_CFG_ECC_EN                0x20000000
 109 #define SDRAM_CFG_RD_EN                 0x10000000
 110 #define SDRAM_CFG_SDRAM_TYPE_DDR1       0x02000000
 111 #define SDRAM_CFG_SDRAM_TYPE_DDR2       0x03000000
 112 #define SDRAM_CFG_SDRAM_TYPE_MASK       0x07000000
 113 #define SDRAM_CFG_SDRAM_TYPE_SHIFT      24
 114 #define SDRAM_CFG_DYN_PWR               0x00200000
 115 #define SDRAM_CFG_DBW_MASK              0x00180000
 116 #define SDRAM_CFG_DBW_SHIFT             19
 117 #define SDRAM_CFG_32_BE                 0x00080000
 118 #define SDRAM_CFG_16_BE                 0x00100000
 119 #define SDRAM_CFG_8_BE                  0x00040000
 120 #define SDRAM_CFG_NCAP                  0x00020000
 121 #define SDRAM_CFG_2T_EN                 0x00008000
 122 #define SDRAM_CFG_BI                    0x00000001
 123
 124 #define SDRAM_CFG2_FRC_SR               0x80000000
 125 #define SDRAM_CFG2_D_INIT               0x00000010
 126 #define SDRAM_CFG2_AP_EN                0x00000020
 127 #define SDRAM_CFG2_ODT_CFG_MASK         0x00600000
 128 #define SDRAM_CFG2_ODT_NEVER            0
 129 #define SDRAM_CFG2_ODT_ONLY_WRITE       1
 130 #define SDRAM_CFG2_ODT_ONLY_READ        2
 131 #define SDRAM_CFG2_ODT_ALWAYS           3
 132
 133 #define SDRAM_INTERVAL_BSTOPRE  0x3FFF
 134 #define TIMING_CFG_2_CPO_MASK   0x0F800000
 135
 136 #if defined(CONFIG_SYS_FSL_DDR_VER) && \
 137         (CONFIG_SYS_FSL_DDR_VER > FSL_DDR_VER_4_4)
 138 #define RD_TO_PRE_MASK          0xf
 139 #define RD_TO_PRE_SHIFT         13
 140 #define WR_DATA_DELAY_MASK      0xf
 141 #define WR_DATA_DELAY_SHIFT     9
 142 #else
 143 #define RD_TO_PRE_MASK          0x7
 144 #define RD_TO_PRE_SHIFT         13
 145 #define WR_DATA_DELAY_MASK      0x7
 146 #define WR_DATA_DELAY_SHIFT     10
 147 #endif
 148
 149 /* DDR_EOR register */
 150 #define DDR_EOR_RD_REOD_DIS     0x07000000
 151 #define DDR_EOR_WD_REOD_DIS     0x00100000
 152
 153 /* DDR_MD_CNTL */
 154 #define MD_CNTL_MD_EN           0x80000000
 155 #define MD_CNTL_CS_SEL_CS0      0x00000000
 156 #define MD_CNTL_CS_SEL_CS1      0x10000000
 157 #define MD_CNTL_CS_SEL_CS2      0x20000000
 158 #define MD_CNTL_CS_SEL_CS3      0x30000000
 159 #define MD_CNTL_CS_SEL_CS0_CS1  0x40000000
 160 #define MD_CNTL_CS_SEL_CS2_CS3  0x50000000
 161 #define MD_CNTL_MD_SEL_MR       0x00000000
 162 #define MD_CNTL_MD_SEL_EMR      0x01000000
 163 #define MD_CNTL_MD_SEL_EMR2     0x02000000
 164 #define MD_CNTL_MD_SEL_EMR3     0x03000000
 165 #define MD_CNTL_SET_REF         0x00800000
 166 #define MD_CNTL_SET_PRE         0x00400000
 167 #define MD_CNTL_CKE_CNTL_LOW    0x00100000
 168 #define MD_CNTL_CKE_CNTL_HIGH   0x00200000
 169 #define MD_CNTL_WRCW            0x00080000
 170 #define MD_CNTL_MD_VALUE(x)     (x & 0x0000FFFF)
 171 #define MD_CNTL_CS_SEL(x)       (((x) & 0x7) << 28)
 172 #define MD_CNTL_MD_SEL(x)       (((x) & 0xf) << 24)
 173
 174 /* DDR_CDR1 */
 175 #define DDR_CDR1_DHC_EN 0x80000000
 176 #define DDR_CDR1_V0PT9_EN       0x40000000
 177 #define DDR_CDR1_ODT_SHIFT      17
 178 #define DDR_CDR1_ODT_MASK       0x6
 179 #define DDR_CDR2_ODT_MASK       0x1
 180 #define DDR_CDR1_ODT(x) ((x & DDR_CDR1_ODT_MASK) << DDR_CDR1_ODT_SHIFT)
 181 #define DDR_CDR2_ODT(x) (x & DDR_CDR2_ODT_MASK)
 182 #define DDR_CDR2_VREF_OVRD(x)   (0x00008080 | ((((x) - 37) & 0x3F) << 8))
 183 #define DDR_CDR2_VREF_TRAIN_EN  0x00000080
 184 #define DDR_CDR2_VREF_RANGE_2   0x00000040
 185
 186 /* DDR ERR_DISABLE */
 187 #define DDR_ERR_DISABLE_APED    (1 << 8)  /* Address parity error disable */
 188
 189 /* Mode Registers */
 190 #define DDR_MR5_CA_PARITY_LAT_4_CLK     0x1 /* for DDR4-1600/1866/2133 */
 191 #define DDR_MR5_CA_PARITY_LAT_5_CLK     0x2 /* for DDR4-2400 */
 192
 193 /* DEBUG_26 register */
 194 #define DDR_CAS_TO_PRE_SUB_MASK  0x0000f000 /* CAS to preamble subtract value */
 195 #define DDR_CAS_TO_PRE_SUB_SHIFT 12
 196
 197 /* DEBUG_29 register */
 198 #define DDR_TX_BD_DIS   (1 << 10) /* Transmit Bit Deskew Disable */
 199
 200
 201 #if (defined(CONFIG_SYS_FSL_DDR_VER) && \
 202         (CONFIG_SYS_FSL_DDR_VER >= FSL_DDR_VER_4_7))
 203 #ifdef CONFIG_SYS_FSL_DDR3L
 204 #define DDR_CDR_ODT_OFF         0x0
 205 #define DDR_CDR_ODT_120ohm      0x1
 206 #define DDR_CDR_ODT_200ohm      0x2
 207 #define DDR_CDR_ODT_75ohm       0x3
 208 #define DDR_CDR_ODT_60ohm       0x5
 209 #define DDR_CDR_ODT_46ohm       0x7
 210 #elif defined(CONFIG_SYS_FSL_DDR4)
 211 #define DDR_CDR_ODT_OFF         0x0
 212 #define DDR_CDR_ODT_100ohm      0x1
 213 #define DDR_CDR_ODT_120OHM      0x2
 214 #define DDR_CDR_ODT_80ohm       0x3
 215 #define DDR_CDR_ODT_60ohm       0x4
 216 #define DDR_CDR_ODT_40ohm       0x5
 217 #define DDR_CDR_ODT_50ohm       0x6
 218 #define DDR_CDR_ODT_30ohm       0x7
 219 #else
 220 #define DDR_CDR_ODT_OFF         0x0
 221 #define DDR_CDR_ODT_120ohm      0x1
 222 #define DDR_CDR_ODT_180ohm      0x2
 223 #define DDR_CDR_ODT_75ohm       0x3
 224 #define DDR_CDR_ODT_110ohm      0x4
 225 #define DDR_CDR_ODT_60hm        0x5
 226 #define DDR_CDR_ODT_70ohm       0x6
 227 #define DDR_CDR_ODT_47ohm       0x7
 228 #endif /* DDR3L */
 229 #else
 230 #define DDR_CDR_ODT_75ohm       0x0
 231 #define DDR_CDR_ODT_55ohm       0x1
 232 #define DDR_CDR_ODT_60ohm       0x2
 233 #define DDR_CDR_ODT_50ohm       0x3
 234 #define DDR_CDR_ODT_150ohm      0x4
 235 #define DDR_CDR_ODT_43ohm       0x5
 236 #define DDR_CDR_ODT_120ohm      0x6
 237 #endif
 238
 239 #define DDR_INIT_ADDR_EXT_UIA   (1 << 31)
 240
 241 /* Record of register values computed */
 242 typedef struct fsl_ddr_cfg_regs_s {
 243         struct {
 244                 unsigned int bnds;
 245                 unsigned int config;
 246                 unsigned int config_2;
 247         } cs[CONFIG_CHIP_SELECTS_PER_CTRL];
 248         unsigned int timing_cfg_3;
 249         unsigned int timing_cfg_0;
 250         unsigned int timing_cfg_1;
 251         unsigned int timing_cfg_2;
 252         unsigned int ddr_sdram_cfg;
 253         unsigned int ddr_sdram_cfg_2;
 254         unsigned int ddr_sdram_cfg_3;
 255         unsigned int ddr_sdram_mode;
 256         unsigned int ddr_sdram_mode_2;
 257         unsigned int ddr_sdram_mode_3;
 258         unsigned int ddr_sdram_mode_4;
 259         unsigned int ddr_sdram_mode_5;
 260         unsigned int ddr_sdram_mode_6;
 261         unsigned int ddr_sdram_mode_7;
 262         unsigned int ddr_sdram_mode_8;
 263         unsigned int ddr_sdram_mode_9;
 264         unsigned int ddr_sdram_mode_10;
 265         unsigned int ddr_sdram_mode_11;
 266         unsigned int ddr_sdram_mode_12;
 267         unsigned int ddr_sdram_mode_13;
 268         unsigned int ddr_sdram_mode_14;
 269         unsigned int ddr_sdram_mode_15;
 270         unsigned int ddr_sdram_mode_16;
 271         unsigned int ddr_sdram_md_cntl;
 272         unsigned int ddr_sdram_interval;
 273         unsigned int ddr_data_init;
 274         unsigned int ddr_sdram_clk_cntl;
 275         unsigned int ddr_init_addr;
 276         unsigned int ddr_init_ext_addr;
 277         unsigned int timing_cfg_4;
 278         unsigned int timing_cfg_5;
 279         unsigned int timing_cfg_6;
 280         unsigned int timing_cfg_7;
 281         unsigned int timing_cfg_8;
 282         unsigned int timing_cfg_9;
 283         unsigned int ddr_zq_cntl;
 284         unsigned int ddr_wrlvl_cntl;
 285         unsigned int ddr_wrlvl_cntl_2;
 286         unsigned int ddr_wrlvl_cntl_3;
 287         unsigned int ddr_sr_cntr;
 288         unsigned int ddr_sdram_rcw_1;
 289         unsigned int ddr_sdram_rcw_2;
 290         unsigned int ddr_sdram_rcw_3;
 291         unsigned int ddr_sdram_rcw_4;
 292         unsigned int ddr_sdram_rcw_5;
 293         unsigned int ddr_sdram_rcw_6;
 294         unsigned int dq_map_0;
 295         unsigned int dq_map_1;
 296         unsigned int dq_map_2;
 297         unsigned int dq_map_3;
 298         unsigned int ddr_eor;
 299         unsigned int ddr_cdr1;
 300         unsigned int ddr_cdr2;
 301         unsigned int err_disable;
 302         unsigned int err_int_en;
 303         unsigned int debug[64];
 304 } fsl_ddr_cfg_regs_t;
 305
 306 typedef struct memctl_options_partial_s {
 307         unsigned int all_dimms_ecc_capable;
 308         unsigned int all_dimms_tckmax_ps;
 309         unsigned int all_dimms_burst_lengths_bitmask;
 310         unsigned int all_dimms_registered;
 311         unsigned int all_dimms_unbuffered;
 312         /*      unsigned int lowest_common_spd_caslat; */
 313         unsigned int all_dimms_minimum_trcd_ps;
 314 } memctl_options_partial_t;
 315
 316 #define DDR_DATA_BUS_WIDTH_64 0
 317 #define DDR_DATA_BUS_WIDTH_32 1
 318 #define DDR_DATA_BUS_WIDTH_16 2
 319 #define DDR_CSWL_CS0    0x04000001
 320 /*
 321  * Generalized parameters for memory controller configuration,
 322  * might be a little specific to the FSL memory controller
 323  */
 324 typedef struct memctl_options_s {
 325         /*
 326          * Memory organization parameters
 327          *
 328          * if DIMM is present in the system
 329          * where DIMMs are with respect to chip select
 330          * where chip selects are with respect to memory boundaries
 331          */
 332         unsigned int registered_dimm_en;    /* use registered DIMM support */
 333
 334         /* Options local to a Chip Select */
 335         struct cs_local_opts_s {
 336                 unsigned int auto_precharge;
 337                 unsigned int odt_rd_cfg;
 338                 unsigned int odt_wr_cfg;
 339                 unsigned int odt_rtt_norm;
 340                 unsigned int odt_rtt_wr;
 341         } cs_local_opts[CONFIG_CHIP_SELECTS_PER_CTRL];
 342
 343         /* Special configurations for chip select */
 344         unsigned int memctl_interleaving;
 345         unsigned int memctl_interleaving_mode;
 346         unsigned int ba_intlv_ctl;
 347         unsigned int addr_hash;
 348
 349         /* Operational mode parameters */
 350         unsigned int ecc_mode;   /* Use ECC? */
 351         /* Initialize ECC using memory controller? */
 352         unsigned int ecc_init_using_memctl;
 353         unsigned int dqs_config;        /* Use DQS? maybe only with DDR2? */
 354         /* SREN - self-refresh during sleep */
 355         unsigned int self_refresh_in_sleep;
 356         /* SR_IE - Self-refresh interrupt enable */
 357         unsigned int self_refresh_interrupt_en;
 358         unsigned int dynamic_power;     /* DYN_PWR */
 359         /* memory data width to use (16-bit, 32-bit, 64-bit) */
 360         unsigned int data_bus_width;
 361         unsigned int burst_length;      /* BL4, OTF and BL8 */
 362         /* On-The-Fly Burst Chop enable */
 363         unsigned int otf_burst_chop_en;
 364         /* mirrior DIMMs for DDR3 */
 365         unsigned int mirrored_dimm;
 366         unsigned int quad_rank_present;
 367         unsigned int ap_en;     /* address parity enable for RDIMM/DDR4-UDIMM */
 368         unsigned int x4_en;     /* enable x4 devices */
 369         unsigned int package_3ds;
 370
 371         /* Global Timing Parameters */
 372         unsigned int cas_latency_override;
 373         unsigned int cas_latency_override_value;
 374         unsigned int use_derated_caslat;
 375         unsigned int additive_latency_override;
 376         unsigned int additive_latency_override_value;
 377
 378         unsigned int clk_adjust;                /* */
 379         unsigned int cpo_override;              /* override timing_cfg_2[CPO]*/
 380         unsigned int cpo_sample;                /* optimize debug_29[24:31] */
 381         unsigned int write_data_delay;          /* DQS adjust */
 382
 383         unsigned int cswl_override;
 384         unsigned int wrlvl_override;
 385         unsigned int wrlvl_sample;              /* Write leveling */
 386         unsigned int wrlvl_start;
 387         unsigned int wrlvl_ctl_2;
 388         unsigned int wrlvl_ctl_3;
 389
 390         unsigned int half_strength_driver_enable;
 391         unsigned int twot_en;
 392         unsigned int threet_en;
 393         unsigned int bstopre;
 394         unsigned int tfaw_window_four_activates_ps;     /* tFAW --  FOUR_ACT */
 395
 396         /* Rtt impedance */
 397         unsigned int rtt_override;              /* rtt_override enable */
 398         unsigned int rtt_override_value;        /* that is Rtt_Nom for DDR3 */
 399         unsigned int rtt_wr_override_value;     /* this is Rtt_WR for DDR3 */
 400
 401         /* Automatic self refresh */
 402         unsigned int auto_self_refresh_en;
 403         unsigned int sr_it;
 404         /* ZQ calibration */
 405         unsigned int zq_en;
 406         /* Write leveling */
 407         unsigned int wrlvl_en;
 408         /* RCW override for RDIMM */
 409         unsigned int rcw_override;
 410         unsigned int rcw_1;
 411         unsigned int rcw_2;
 412         unsigned int rcw_3;
 413         /* control register 1 */
 414         unsigned int ddr_cdr1;
 415         unsigned int ddr_cdr2;
 416
 417         unsigned int trwt_override;
 418         unsigned int trwt;                      /* read-to-write turnaround */
 419 } memctl_options_t;
 420
 421 phys_size_t fsl_ddr_sdram(void);
 422 phys_size_t fsl_ddr_sdram_size(void);
 423 phys_size_t fsl_other_ddr_sdram(unsigned long long base,
 424                                 unsigned int first_ctrl,
 425                                 unsigned int num_ctrls,
 426                                 unsigned int dimm_slots_per_ctrl,
 427                                 int (*board_need_reset)(void),
 428                                 void (*board_reset)(void),
 429                                 void (*board_de_reset)(void));
 430 extern int fsl_use_spd(void);
 431 void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
 432                              unsigned int ctrl_num, int step);
 433 u32 fsl_ddr_get_intl3r(void);
 434 void print_ddr_info(unsigned int start_ctrl);
 435
 436 static void __board_assert_mem_reset(void)
 437 {
 438 }
 439
 440 static void __board_deassert_mem_reset(void)
 441 {
 442 }
 443
 444 void board_assert_mem_reset(void)
 445         __attribute__((weak, alias("__board_assert_mem_reset")));
 446
 447 void board_deassert_mem_reset(void)
 448         __attribute__((weak, alias("__board_deassert_mem_reset")));
 449
 450 static int __board_need_mem_reset(void)
 451 {
 452         return 0;
 453 }
 454
 455 int board_need_mem_reset(void)
 456         __attribute__((weak, alias("__board_need_mem_reset")));
 457
 458 #if defined(CONFIG_DEEP_SLEEP)
 459 void board_mem_sleep_setup(void);
 460 bool is_warm_boot(void);
 461 int fsl_dp_resume(void);
 462 #endif
 463
 464 /*
 465  * The 85xx boards have a common prototype for fixed_sdram so put the
 466  * declaration here.
 467  */
 468 #ifdef CONFIG_MPC85xx
 469 extern phys_size_t fixed_sdram(void);
 470 #endif
 471
 472 #if defined(CONFIG_DDR_ECC)
 473 extern void ddr_enable_ecc(unsigned int dram_size);
 474 #endif
 475
 476
 477 typedef struct fixed_ddr_parm{
 478         int min_freq;
 479         int max_freq;
 480         fsl_ddr_cfg_regs_t *ddr_settings;
 481 } fixed_ddr_parm_t;
 482
 483 /**
 484  * fsl_initdram() - Set up the SDRAM
 485  *
 486  * @return 0 if OK, -ve on error
 487  */
 488 int fsl_initdram(void);
 489
 490 #endif