src/cpu/amd/model_lx/cpureginit.c

   1 /*
   2  * This file is part of the LinuxBIOS project.
   3  *
   4  * Copyright (C) 2006 Indrek Kruusa <indrek.kruusa@artecdesign.ee>
   5  * Copyright (C) 2006 Ronald G. Minnich <rminnich@gmail.com>
   6  * Copyright (C) 2007 Advanced Micro Devices, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21  */
  22
  23 /**************************************************************************
  24 ;*
  25 ;*      SetDelayControl
  26 ;*
  27 ;*************************************************************************/
  28 void SetDelayControl(void)
  29 {
  30         unsigned int msrnum, glspeed;
  31         unsigned char spdbyte0, spdbyte1;
  32         msr_t msr;
  33
  34         glspeed = GeodeLinkSpeed();
  35
  36         /* fix delay controls for DM and IM arrays */
  37         msrnum = CPU_BC_MSS_ARRAY_CTL0;
  38         msr.hi = 0;
  39         msr.lo = 0x2814D352;
  40         wrmsr(msrnum, msr);
  41
  42         msrnum = CPU_BC_MSS_ARRAY_CTL1;
  43         msr.hi = 0;
  44         msr.lo = 0x1068334D;
  45         wrmsr(msrnum, msr);
  46
  47         msrnum = CPU_BC_MSS_ARRAY_CTL2;
  48         msr.hi = 0x00000106;
  49         msr.lo = 0x83104104;
  50         wrmsr(msrnum, msr);
  51
  52         msrnum = GLCP_FIFOCTL;
  53         msr = rdmsr(msrnum);
  54         msr.hi = 0x00000005;
  55         wrmsr(msrnum, msr);
  56
  57         /* Enable setting */
  58         msrnum = CPU_BC_MSS_ARRAY_CTL_ENA;
  59         msr.hi = 0;
  60         msr.lo = 0x00000001;
  61         wrmsr(msrnum, msr);
  62
  63         /* Debug Delay Control Setup Check
  64            Leave it alone if it has been setup. FS2 or something is here. */
  65         msrnum = GLCP_DELAY_CONTROLS;
  66         msr = rdmsr(msrnum);
  67         if (msr.lo & ~(0x7C0)) {
  68                 return;
  69         }
  70
  71         /*
  72          * Delay Controls based on DIMM loading. UGH!
  73          * # of Devices = Module Width (SPD6) / Device Width(SPD13) * Physical Banks(SPD5)
  74          * Note - We only support module width of 64.
  75          */
  76         spdbyte0 = spd_read_byte(DIMM0, SPD_PRIMARY_SDRAM_WIDTH);
  77         if (spdbyte0 != 0xFF) {
  78                 spdbyte0 = (unsigned char)64 / spdbyte0 *
  79                     (unsigned char)(spd_read_byte(DIMM0, SPD_NUM_DIMM_BANKS));
  80         } else {
  81                 spdbyte0 = 0;
  82         }
  83
  84         spdbyte1 = spd_read_byte(DIMM1, SPD_PRIMARY_SDRAM_WIDTH);
  85         if (spdbyte1 != 0xFF) {
  86                 spdbyte1 = (unsigned char)64 / spdbyte1 *
  87                     (unsigned char)(spd_read_byte(DIMM1, SPD_NUM_DIMM_BANKS));
  88         } else {
  89                 spdbyte1 = 0;
  90         }
  91
  92 /* The current thinking. Subject to change...
  93
  94 ;                                                                  "FUTURE ROBUSTNESS" PROPOSAL
  95 ;                                                                  ----------------------------
  96 ;               DIMM     Max MBUS                                          MC 0x2000001A bits 26:24
  97 ;DIMMs  devices  Frequency       MCP 0x4C00000F Setting          vvv
  98 ;-----  -------  ---------       ----------------------  ----------
  99 ;1               4               400MHz          0x82*100FF 0x56960004            4
 100 ;1               8               400MHz          0x82*100AA 0x56960004            4
 101 ;1               16              400MHz          0x82*10055 0x56960004            4
 102 ;
 103 ;2               4,4     400MHz          0x82710000 0x56960004            4
 104 ;
 105 ;1               4               <=333MHz        0x83*100FF 0x56960004            3
 106 ;1               8               <=333MHz        0x83*100AA 0x56960004            3
 107 ;1               16              <=333MHz        0x83*100AA 0x56960004            3
 108 ;
 109 ;2               4,4     <=333MHz        0x837100A5 0x56960004            3
 110 ;2               8,8     <=333MHz        0x937100A5 0x56960004            3
 111 ;
 112 ;=========================================================================
 113 ;* - Bit 55 (disable SDCLK 1,3,5) should be set if there is a single DIMM in slot 0,
 114 ;        but it should be clear for all 2 DIMM settings and if a single DIMM is in slot 1.
 115 ;        Bits 54:52 should always be set to '111'.
 116
 117 ;No VTT termination
 118 ;-------------------------------------
 119 ;ADDR/CTL have 22 ohm series R
 120 ;DQ/DQM/DQS have 33 ohm series R
 121 ;
 122 ;               DIMM     Max MBUS
 123 ;DIMMs  devices  Frequency       MCP 0x4C00000F Setting
 124 ;-----  -------  ---------       ----------------------
 125 ;1               4               400MHz          0xF2F100FF 0x56960004            4                     The No VTT changes improve timing.
 126 ;1               8               400MHz          0xF2F100FF 0x56960004            4
 127 ;1               4               <=333MHz        0xF2F100FF 0x56960004            3
 128 ;1               8               <=333MHz        0xF2F100FF 0x56960004            3
 129 ;1               16              <=333MHz        0xF2F100FF 0x56960004            3
 130 */
 131         msr.hi = msr.lo = 0;
 132
 133         if (spdbyte0 == 0 || spdbyte1 == 0) {
 134                 /* one dimm solution */
 135                 if (spdbyte1 == 0) {
 136                         msr.hi |= 0x000800000;
 137                 }
 138                 spdbyte0 += spdbyte1;
 139                 if (spdbyte0 > 8) {
 140                         /* large dimm */
 141                         if (glspeed < 334) {
 142                                 msr.hi |= 0x0837100AA;
 143                                 msr.lo |= 0x056960004;
 144                         } else {
 145                                 msr.hi |= 0x082710055;
 146                                 msr.lo |= 0x056960004;
 147                         }
 148                 } else if (spdbyte0 > 4) {
 149                         /* medium dimm */
 150                         if (glspeed < 334) {
 151                                 msr.hi |= 0x0837100AA;
 152                                 msr.lo |= 0x056960004;
 153                         } else {
 154                                 msr.hi |= 0x0827100AA;
 155                                 msr.lo |= 0x056960004;
 156                         }
 157                 } else {
 158                         /* small dimm */
 159                         if (glspeed < 334) {
 160                                 msr.hi |= 0x0837100FF;
 161                                 msr.lo |= 0x056960004;
 162                         } else {
 163                                 msr.hi |= 0x0827100FF;
 164                                 msr.lo |= 0x056960004;
 165                         }
 166                 }
 167         } else {
 168                 /* two dimm solution */
 169                 spdbyte0 += spdbyte1;
 170                 if (spdbyte0 > 24) {
 171                         /* huge dimms */
 172                         if (glspeed < 334) {
 173                                 msr.hi |= 0x0B37100A5;
 174                                 msr.lo |= 0x056960004;
 175                         } else {
 176                                 msr.hi |= 0x0B2710000;
 177                                 msr.lo |= 0x056960004;
 178                         }
 179                 } else if (spdbyte0 > 16) {
 180                         /* large dimms */
 181                         if (glspeed < 334) {
 182                                 msr.hi |= 0x0B37100A5;
 183                                 msr.lo |= 0x056960004;
 184                         } else {
 185                                 msr.hi |= 0x0B27100A5;
 186                                 msr.lo |= 0x056960004;
 187                         }
 188                 } else if (spdbyte0 >= 8) {
 189                         /* medium dimms */
 190                         if (glspeed < 334) {
 191                                 msr.hi |= 0x0937100A5;
 192                                 msr.lo |= 0x056960004;
 193                         } else {
 194                                 msr.hi |= 0x0C27100A5;
 195                                 msr.lo |= 0x056960004;
 196                         }
 197                 } else {
 198                         /* small dimms */
 199                         if (glspeed < 334) {
 200                                 msr.hi |= 0x0837100A5;
 201                                 msr.lo |= 0x056960004;
 202                         } else {
 203                                 msr.hi |= 0x082710000;
 204                                 msr.lo |= 0x056960004;
 205                         }
 206                 }
 207         }
 208         wrmsr(GLCP_DELAY_CONTROLS, msr);
 209         return;
 210 }
 211
 212 /* ***************************************************************************/
 213 /* *    cpuRegInit*/
 214 /* ***************************************************************************/
 215 void cpuRegInit(void)
 216 {
 217         int msrnum;
 218         msr_t msr;
 219
 220         /* Castle 2.0 BTM periodic sync period. */
 221         /*      [40:37] 1 sync record per 256 bytes */
 222         msrnum = CPU_PF_CONF;
 223         msr = rdmsr(msrnum);
 224         msr.hi |= (0x8 << 5);
 225         wrmsr(msrnum, msr);
 226
 227         /*
 228          * LX performance setting.
 229          * Enable Quack for fewer re-RAS on the MC
 230          */
 231         msrnum = GLIU0_ARB;
 232         msr = rdmsr(msrnum);
 233         msr.hi &= ~ARB_UPPER_DACK_EN_SET;
 234         msr.hi |= ARB_UPPER_QUACK_EN_SET;
 235         wrmsr(msrnum, msr);
 236
 237         msrnum = GLIU1_ARB;
 238         msr = rdmsr(msrnum);
 239         msr.hi &= ~ARB_UPPER_DACK_EN_SET;
 240         msr.hi |= ARB_UPPER_QUACK_EN_SET;
 241         wrmsr(msrnum, msr);
 242
 243         /*      GLIU port active enable, limit south pole masters (AES and PCI) to one outstanding transaction. */
 244         msrnum = GLIU1_PORT_ACTIVE;
 245         msr = rdmsr(msrnum);
 246         msr.lo &= ~0x880;
 247         wrmsr(msrnum, msr);
 248
 249         /* Set the Delay Control in GLCP */
 250         SetDelayControl();
 251
 252         /*  Enable RSDC */
 253         msrnum = CPU_AC_SMM_CTL;
 254         msr = rdmsr(msrnum);
 255         msr.lo |= SMM_INST_EN_SET;
 256         wrmsr(msrnum, msr);
 257
 258         /* FPU imprecise exceptions bit */
 259         msrnum = CPU_FPU_MSR_MODE;
 260         msr = rdmsr(msrnum);
 261         msr.lo |= FPU_IE_SET;
 262         wrmsr(msrnum, msr);
 263
 264         /* Power Savers (Do after BIST) */
 265         /* Enable Suspend on HLT & PAUSE instructions */
 266         msrnum = CPU_XC_CONFIG;
 267         msr = rdmsr(msrnum);
 268         msr.lo |= XC_CONFIG_SUSP_ON_HLT | XC_CONFIG_SUSP_ON_PAUSE;
 269         wrmsr(msrnum, msr);
 270
 271         /* Enable SUSP and allow TSC to run in Suspend (keep speed detection happy) */
 272         msrnum = CPU_BC_CONF_0;
 273         msr = rdmsr(msrnum);
 274         msr.lo |= TSC_SUSP_SET | SUSP_EN_SET;
 275         msr.lo &= 0x0F0FFFFFF;
 276         msr.lo |= 0x002000000;  /* PBZ213: Set PAUSEDLY = 2 */
 277         wrmsr(msrnum, msr);
 278
 279         /* Disable the debug clock to save power. */
 280         /* NOTE: leave it enabled for fs2 debug */
 281 #if 0
 282         msrnum = GLCP_DBGCLKCTL;
 283         msr.hi = 0;
 284         msr.lo = 0;
 285         wrmsr(msrnum, msr);
 286 #endif
 287
 288         /* Setup throttling delays to proper mode if it is ever enabled. */
 289         msrnum = GLCP_TH_OD;
 290         msr.hi = 0;
 291         msr.lo = 0x00000603C;
 292         wrmsr(msrnum, msr);
 293 }