cpu/mpc5xxx/cpu_init.c

   1 /*
   2  * (C) Copyright 2000-2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (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., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <mpc5xxx.h>
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 /*
  30  * Breath some life into the CPU...
  31  *
  32  * Set up the memory map,
  33  * initialize a bunch of registers.
  34  */
  35 void cpu_init_f (void)
  36 {
  37         unsigned long addecr = (1 << 25); /* Boot_CS */
  38 #if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_MGT5100)
  39         addecr |= (1 << 22); /* SDRAM enable */
  40 #endif
  41         /* Pointer is writable since we allocated a register for it */
  42         gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
  43
  44         /* Clear initial global data */
  45         memset ((void *) gd, 0, sizeof (gd_t));
  46
  47         /*
  48          * Memory Controller: configure chip selects and enable them
  49          */
  50 #if defined(CONFIG_SYS_BOOTCS_START) && defined(CONFIG_SYS_BOOTCS_SIZE)
  51         *(vu_long *)MPC5XXX_BOOTCS_START = START_REG(CONFIG_SYS_BOOTCS_START);
  52         *(vu_long *)MPC5XXX_BOOTCS_STOP = STOP_REG(CONFIG_SYS_BOOTCS_START,
  53                         CONFIG_SYS_BOOTCS_SIZE);
  54 #endif
  55 #if defined(CONFIG_SYS_BOOTCS_CFG)
  56         *(vu_long *)MPC5XXX_BOOTCS_CFG = CONFIG_SYS_BOOTCS_CFG;
  57 #endif
  58
  59 #if defined(CONFIG_SYS_CS0_START) && defined(CONFIG_SYS_CS0_SIZE)
  60         *(vu_long *)MPC5XXX_CS0_START = START_REG(CONFIG_SYS_CS0_START);
  61         *(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(CONFIG_SYS_CS0_START, CONFIG_SYS_CS0_SIZE);
  62         /* CS0 and BOOT_CS cannot be enabled at once. */
  63         /*      addecr |= (1 << 16); */
  64 #endif
  65 #if defined(CONFIG_SYS_CS0_CFG)
  66         *(vu_long *)MPC5XXX_CS0_CFG = CONFIG_SYS_CS0_CFG;
  67 #endif
  68
  69 #if defined(CONFIG_SYS_CS1_START) && defined(CONFIG_SYS_CS1_SIZE)
  70         *(vu_long *)MPC5XXX_CS1_START = START_REG(CONFIG_SYS_CS1_START);
  71         *(vu_long *)MPC5XXX_CS1_STOP = STOP_REG(CONFIG_SYS_CS1_START, CONFIG_SYS_CS1_SIZE);
  72         addecr |= (1 << 17);
  73 #endif
  74 #if defined(CONFIG_SYS_CS1_CFG)
  75         *(vu_long *)MPC5XXX_CS1_CFG = CONFIG_SYS_CS1_CFG;
  76 #endif
  77
  78 #if defined(CONFIG_SYS_CS2_START) && defined(CONFIG_SYS_CS2_SIZE)
  79         *(vu_long *)MPC5XXX_CS2_START = START_REG(CONFIG_SYS_CS2_START);
  80         *(vu_long *)MPC5XXX_CS2_STOP = STOP_REG(CONFIG_SYS_CS2_START, CONFIG_SYS_CS2_SIZE);
  81         addecr |= (1 << 18);
  82 #endif
  83 #if defined(CONFIG_SYS_CS2_CFG)
  84         *(vu_long *)MPC5XXX_CS2_CFG = CONFIG_SYS_CS2_CFG;
  85 #endif
  86
  87 #if defined(CONFIG_SYS_CS3_START) && defined(CONFIG_SYS_CS3_SIZE)
  88         *(vu_long *)MPC5XXX_CS3_START = START_REG(CONFIG_SYS_CS3_START);
  89         *(vu_long *)MPC5XXX_CS3_STOP = STOP_REG(CONFIG_SYS_CS3_START, CONFIG_SYS_CS3_SIZE);
  90         addecr |= (1 << 19);
  91 #endif
  92 #if defined(CONFIG_SYS_CS3_CFG)
  93         *(vu_long *)MPC5XXX_CS3_CFG = CONFIG_SYS_CS3_CFG;
  94 #endif
  95
  96 #if defined(CONFIG_SYS_CS4_START) && defined(CONFIG_SYS_CS4_SIZE)
  97         *(vu_long *)MPC5XXX_CS4_START = START_REG(CONFIG_SYS_CS4_START);
  98         *(vu_long *)MPC5XXX_CS4_STOP = STOP_REG(CONFIG_SYS_CS4_START, CONFIG_SYS_CS4_SIZE);
  99         addecr |= (1 << 20);
 100 #endif
 101 #if defined(CONFIG_SYS_CS4_CFG)
 102         *(vu_long *)MPC5XXX_CS4_CFG = CONFIG_SYS_CS4_CFG;
 103 #endif
 104
 105 #if defined(CONFIG_SYS_CS5_START) && defined(CONFIG_SYS_CS5_SIZE)
 106         *(vu_long *)MPC5XXX_CS5_START = START_REG(CONFIG_SYS_CS5_START);
 107         *(vu_long *)MPC5XXX_CS5_STOP = STOP_REG(CONFIG_SYS_CS5_START, CONFIG_SYS_CS5_SIZE);
 108         addecr |= (1 << 21);
 109 #endif
 110 #if defined(CONFIG_SYS_CS5_CFG)
 111         *(vu_long *)MPC5XXX_CS5_CFG = CONFIG_SYS_CS5_CFG;
 112 #endif
 113
 114 #if defined(CONFIG_MPC5200)
 115         addecr |= 1;
 116 #if defined(CONFIG_SYS_CS6_START) && defined(CONFIG_SYS_CS6_SIZE)
 117         *(vu_long *)MPC5XXX_CS6_START = START_REG(CONFIG_SYS_CS6_START);
 118         *(vu_long *)MPC5XXX_CS6_STOP = STOP_REG(CONFIG_SYS_CS6_START, CONFIG_SYS_CS6_SIZE);
 119         addecr |= (1 << 26);
 120 #endif
 121 #if defined(CONFIG_SYS_CS6_CFG)
 122         *(vu_long *)MPC5XXX_CS6_CFG = CONFIG_SYS_CS6_CFG;
 123 #endif
 124
 125 #if defined(CONFIG_SYS_CS7_START) && defined(CONFIG_SYS_CS7_SIZE)
 126         *(vu_long *)MPC5XXX_CS7_START = START_REG(CONFIG_SYS_CS7_START);
 127         *(vu_long *)MPC5XXX_CS7_STOP = STOP_REG(CONFIG_SYS_CS7_START, CONFIG_SYS_CS7_SIZE);
 128         addecr |= (1 << 27);
 129 #endif
 130 #if defined(CONFIG_SYS_CS7_CFG)
 131         *(vu_long *)MPC5XXX_CS7_CFG = CONFIG_SYS_CS7_CFG;
 132 #endif
 133
 134 #if defined(CONFIG_SYS_CS_BURST)
 135         *(vu_long *)MPC5XXX_CS_BURST = CONFIG_SYS_CS_BURST;
 136 #endif
 137 #if defined(CONFIG_SYS_CS_DEADCYCLE)
 138         *(vu_long *)MPC5XXX_CS_DEADCYCLE = CONFIG_SYS_CS_DEADCYCLE;
 139 #endif
 140 #endif /* CONFIG_MPC5200 */
 141
 142         /* Enable chip selects */
 143         *(vu_long *)MPC5XXX_ADDECR = addecr;
 144         *(vu_long *)MPC5XXX_CS_CTRL = (1 << 24);
 145
 146         /* Setup pin multiplexing */
 147 #if defined(CONFIG_SYS_GPS_PORT_CONFIG)
 148         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG = CONFIG_SYS_GPS_PORT_CONFIG;
 149 #endif
 150
 151 #if defined(CONFIG_MPC5200)
 152         /* enable timebase */
 153         *(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 13);
 154
 155         /* Enable snooping for RAM */
 156         *(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 15);
 157         *(vu_long *)(MPC5XXX_XLBARB + 0x70) = CONFIG_SYS_SDRAM_BASE | 0x1d;
 158
 159 # if defined(CONFIG_SYS_IPBCLK_EQUALS_XLBCLK)
 160         /* Motorola reports IPB should better run at 133 MHz. */
 161         *(vu_long *)MPC5XXX_ADDECR |= 1;
 162         /* pci_clk_sel = 0x02, ipb_clk_sel = 0x00; */
 163         addecr = *(vu_long *)MPC5XXX_CDM_CFG;
 164         addecr &= ~0x103;
 165 #  if defined(CONFIG_SYS_PCICLK_EQUALS_IPBCLK_DIV2)
 166         /* pci_clk_sel = 0x01 -> IPB_CLK/2 */
 167         addecr |= 0x01;
 168 #  else
 169         /* pci_clk_sel = 0x02 -> XLB_CLK/4 = IPB_CLK/4 */
 170         addecr |= 0x02;
 171 #  endif /* CONFIG_SYS_PCICLK_EQUALS_IPBCLK_DIV2 */
 172         *(vu_long *)MPC5XXX_CDM_CFG = addecr;
 173 # endif /* CONFIG_SYS_IPBCLK_EQUALS_XLBCLK */
 174         /* Configure the XLB Arbiter */
 175         *(vu_long *)MPC5XXX_XLBARB_MPRIEN = 0xff;
 176         *(vu_long *)MPC5XXX_XLBARB_MPRIVAL = 0x11111111;
 177
 178 # if defined(CONFIG_SYS_XLB_PIPELINING)
 179         /* Enable piplining */
 180         *(vu_long *)(MPC5XXX_XLBARB + 0x40) &= ~(1 << 31);
 181 # endif
 182 #endif  /* CONFIG_MPC5200 */
 183 }
 184
 185 /*
 186  * initialize higher level parts of CPU like time base and timers
 187  */
 188 int cpu_init_r (void)
 189 {
 190         /* mask all interrupts */
 191 #if defined(CONFIG_MGT5100)
 192         *(vu_long *)MPC5XXX_ICTL_PER_MASK = 0xfffffc00;
 193 #elif defined(CONFIG_MPC5200)
 194         *(vu_long *)MPC5XXX_ICTL_PER_MASK = 0xffffff00;
 195 #endif
 196         *(vu_long *)MPC5XXX_ICTL_CRIT |= 0x0001ffff;
 197         *(vu_long *)MPC5XXX_ICTL_EXT &= ~0x00000f00;
 198         /* route critical ints to normal ints */
 199         *(vu_long *)MPC5XXX_ICTL_EXT |= 0x00000001;
 200
 201 #if defined(CONFIG_CMD_NET) && defined(CONFIG_MPC5xxx_FEC)
 202         /* load FEC microcode */
 203         loadtask(0, 2);
 204 #endif
 205
 206         return (0);
 207 }