arch/mips/momentum/ocelot_g/setup.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  * Momentum Computer Ocelot-G (CP7000G) - board dependent boot routines
   4  *
   5  * Copyright (C) 1996, 1997, 2001  Ralf Baechle
   6  * Copyright (C) 2000 RidgeRun, Inc.
   7  * Copyright (C) 2001 Red Hat, Inc.
   8  * Copyright (C) 2002 Momentum Computer
   9  *
  10  * Author: Matthew Dharm, Momentum Computer
  11  *   mdharm@momenco.com
  12  *
  13  * Author: RidgeRun, Inc.
  14  *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
  15  *
  16  * Copyright 2001 MontaVista Software Inc.
  17  * Author: jsun@mvista.com or jsun@junsun.net
  18  *
  19  *  This program is free software; you can redistribute  it and/or modify it
  20  *  under  the terms of  the GNU General  Public License as published by the
  21  *  Free Software Foundation;  either version 2 of the  License, or (at your
  22  *  option) any later version.
  23  *
  24  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  25  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  26  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  27  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  28  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  29  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  30  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  31  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  32  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  33  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  *  You should have received a copy of the  GNU General Public License along
  36  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  37  *  675 Mass Ave, Cambridge, MA 02139, USA.
  38  *
  39  */
  40 #include <linux/config.h>
  41 #include <linux/init.h>
  42 #include <linux/kernel.h>
  43 #include <linux/types.h>
  44 #include <linux/mm.h>
  45 #include <linux/swap.h>
  46 #include <linux/ioport.h>
  47 #include <linux/sched.h>
  48 #include <linux/interrupt.h>
  49 #include <linux/pci.h>
  50 #include <linux/timex.h>
  51 #include <linux/vmalloc.h>
  52 #include <asm/time.h>
  53 #include <asm/bootinfo.h>
  54 #include <asm/page.h>
  55 #include <asm/io.h>
  56 #include <asm/gt64240.h>
  57 #include <asm/irq.h>
  58 #include <asm/pci.h>
  59 #include <asm/processor.h>
  60 #include <asm/ptrace.h>
  61 #include <asm/reboot.h>
  62 #include <linux/bootmem.h>
  63
  64 #include "ocelot_pld.h"
  65
  66 #ifdef CONFIG_GALILLEO_GT64240_ETH
  67 extern unsigned char prom_mac_addr_base[6];
  68 #endif
  69
  70 unsigned long marvell_base;
  71
  72 /* These functions are used for rebooting or halting the machine*/
  73 extern void momenco_ocelot_restart(char *command);
  74 extern void momenco_ocelot_halt(void);
  75 extern void momenco_ocelot_power_off(void);
  76
  77 extern void gt64240_time_init(void);
  78 extern void momenco_ocelot_irq_setup(void);
  79
  80 static char reset_reason;
  81
  82 static unsigned long ENTRYLO(unsigned long paddr)
  83 {
  84         return ((paddr & PAGE_MASK) |
  85                (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
  86                 _CACHE_UNCACHED)) >> 6;
  87 }
  88
  89 /* setup code for a handoff from a version 2 PMON 2000 PROM */
  90 void PMON_v2_setup(void)
  91 {
  92         /* A wired TLB entry for the GT64240 and the serial port. The
  93            GT64240 is going to be hit on every IRQ anyway - there's
  94            absolutely no point in letting it be a random TLB entry, as
  95            it'll just cause needless churning of the TLB. And we use
  96            the other half for the serial port, which is just a PITA
  97            otherwise :)
  98
  99                 Device                  Physical        Virtual
 100                 GT64240 Internal Regs   0xf4000000      0xe0000000
 101                 UARTs (CS2)             0xfd000000      0xe0001000
 102         */
 103         add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000),
 104                         0xf4000000, PM_64K);
 105         add_wired_entry(ENTRYLO(0xfd000000), ENTRYLO(0xfd001000),
 106                         0xfd000000, PM_4K);
 107
 108         /* Also a temporary entry to let us talk to the Ocelot PLD and NVRAM
 109            in the CS[012] region. We can't use ioremap() yet. The NVRAM
 110            is a ST M48T37Y, which includes NVRAM, RTC, and Watchdog functions.
 111
 112                 Ocelot PLD (CS0)        0xfc000000      0xe0020000
 113                 NVRAM (CS1)             0xfc800000      0xe0030000
 114         */
 115         add_temporary_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfc010000),
 116                             0xfc000000, PM_64K);
 117         add_temporary_entry(ENTRYLO(0xfc800000), ENTRYLO(0xfc810000),
 118                             0xfc800000, PM_64K);
 119
 120         marvell_base = 0xf4000000;
 121 }
 122
 123 extern int rm7k_tcache_enabled;
 124
 125 /*
 126  * This runs in KSEG1. See the verbiage in rm7k.c::probe_scache()
 127  */
 128 #define Page_Invalidate_T 0x16
 129 static void __init setup_l3cache(unsigned long size)
 130 {
 131         int register i;
 132
 133         printk("Enabling L3 cache...");
 134
 135         /* Enable the L3 cache in the GT64120A's CPU Configuration register */
 136         MV_WRITE(0, MV_READ(0) | (1<<14));
 137
 138         /* Enable the L3 cache in the CPU */
 139         set_c0_config(1<<12 /* CONF_TE */);
 140
 141         /* Clear the cache */
 142         write_c0_taglo(0);
 143         write_c0_taghi(0);
 144
 145         for (i=0; i < size; i+= 4096) {
 146                 __asm__ __volatile__ (
 147                         ".set noreorder\n\t"
 148                         ".set mips3\n\t"
 149                         "cache %1, (%0)\n\t"
 150                         ".set mips0\n\t"
 151                         ".set reorder"
 152                         :
 153                         : "r" (KSEG0ADDR(i)),
 154                           "i" (Page_Invalidate_T));
 155         }
 156
 157         /* Let the RM7000 MM code know that the tertiary cache is enabled */
 158         rm7k_tcache_enabled = 1;
 159
 160         printk("Done\n");
 161 }
 162
 163 static int  __init momenco_ocelot_g_setup(void)
 164 {
 165         void (*l3func)(unsigned long) = (void *) KSEG1ADDR(setup_l3cache);
 166         unsigned int tmpword;
 167
 168         board_time_init = gt64240_time_init;
 169
 170         _machine_restart = momenco_ocelot_restart;
 171         _machine_halt = momenco_ocelot_halt;
 172         _machine_power_off = momenco_ocelot_power_off;
 173
 174         /*
 175          * initrd_start = (ulong)ocelot_initrd_start;
 176          * initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size;
 177          * initrd_below_start_ok = 1;
 178          */
 179
 180         /* do handoff reconfiguration */
 181         PMON_v2_setup();
 182
 183 #ifdef CONFIG_GALILLEO_GT64240_ETH
 184         /* get the mac addr */
 185         memcpy(prom_mac_addr_base, (void*)0xfc807cf2, 6);
 186 #endif
 187
 188         /* Turn off the Bit-Error LED */
 189         OCELOT_PLD_WRITE(0x80, INTCLR);
 190
 191         tmpword = OCELOT_PLD_READ(BOARDREV);
 192         if (tmpword < 26)
 193                 printk("Momenco Ocelot-G: Board Assembly Rev. %c\n", 'A'+tmpword);
 194         else
 195                 printk("Momenco Ocelot-G: Board Assembly Revision #0x%x\n", tmpword);
 196
 197         tmpword = OCELOT_PLD_READ(PLD1_ID);
 198         printk("PLD 1 ID: %d.%d\n", tmpword>>4, tmpword&15);
 199         tmpword = OCELOT_PLD_READ(PLD2_ID);
 200         printk("PLD 2 ID: %d.%d\n", tmpword>>4, tmpword&15);
 201         tmpword = OCELOT_PLD_READ(RESET_STATUS);
 202         printk("Reset reason: 0x%x\n", tmpword);
 203         reset_reason = tmpword;
 204         OCELOT_PLD_WRITE(0xff, RESET_STATUS);
 205
 206         tmpword = OCELOT_PLD_READ(BOARD_STATUS);
 207         printk("Board Status register: 0x%02x\n", tmpword);
 208         printk("  - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
 209         printk("  - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
 210         printk("  - Tulip PHY %s connected\n", (tmpword&0x10)?"is":"not");
 211         printk("  - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
 212         printk("  - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
 213
 214         if (tmpword&12)
 215                 l3func((1<<(((tmpword&12) >> 2)+20)));
 216
 217         switch(tmpword &3) {
 218         case 3:
 219                 /* 512MiB -- two banks of 256MiB */
 220                 add_memory_region(  0x0<<20, 0x100<<20, BOOT_MEM_RAM);
 221 /*
 222                 add_memory_region(0x100<<20, 0x100<<20, BOOT_MEM_RAM);
 223 */
 224                 break;
 225         case 2:
 226                 /* 256MiB -- two banks of 128MiB */
 227                 add_memory_region( 0x0<<20, 0x80<<20, BOOT_MEM_RAM);
 228                 add_memory_region(0x80<<20, 0x80<<20, BOOT_MEM_RAM);
 229                 break;
 230         case 1:
 231                 /* 128MiB -- 64MiB per bank */
 232                 add_memory_region( 0x0<<20, 0x40<<20, BOOT_MEM_RAM);
 233                 add_memory_region(0x40<<20, 0x40<<20, BOOT_MEM_RAM);
 234                 break;
 235         case 0:
 236                 /* 64MiB */
 237                 add_memory_region( 0x0<<20, 0x40<<20, BOOT_MEM_RAM);
 238                 break;
 239         }
 240
 241         /* FIXME: Fix up the DiskOnChip mapping */
 242         MV_WRITE(0x468, 0xfef73);
 243
 244         return 0;
 245 }
 246
 247 early_initcall(momenco_ocelot_g_setup);
 248
 249 /* This needs to be one of the first initcalls, because no I/O port access
 250    can work before this */
 251
 252 static int io_base_ioremap(void)
 253 {
 254         /* we're mapping PCI accesses from 0xc0000000 to 0xf0000000 */
 255         unsigned long io_remap_range;
 256
 257         io_remap_range = (unsigned long) ioremap(0xc0000000, 0x30000000);
 258         if (!io_remap_range)
 259                 panic("Could not ioremap I/O port range");
 260
 261         set_io_port_base(io_remap_range - 0xc0000000);
 262
 263         return 0;
 264 }
 265
 266 module_init(io_base_ioremap);