arch/powerpc/boot/treeboot-currituck.c

   1 /*
   2  * Copyright © 2011 Tony Breeds IBM Corporation
   3  *
   4  * Based on earlier code:
   5  *   Copyright (C) Paul Mackerras 1997.
   6  *
   7  *   Matt Porter <mporter@kernel.crashing.org>
   8  *   Copyright 2002-2005 MontaVista Software Inc.
   9  *
  10  *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  11  *   Copyright (c) 2003, 2004 Zultys Technologies
  12  *
  13  *    Copyright 2007 David Gibson, IBM Corporation.
  14  *    Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
  15  *    Copyright © 2011 David Kleikamp IBM Corporation
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License
  19  * as published by the Free Software Foundation; either version
  20  * 2 of the License, or (at your option) any later version.
  21  */
  22 #include <stdarg.h>
  23 #include <stddef.h>
  24 #include "types.h"
  25 #include "elf.h"
  26 #include "string.h"
  27 #include "stdio.h"
  28 #include "page.h"
  29 #include "ops.h"
  30 #include "reg.h"
  31 #include "io.h"
  32 #include "dcr.h"
  33 #include "4xx.h"
  34 #include "44x.h"
  35 #include "libfdt.h"
  36
  37 BSS_STACK(4096);
  38
  39 #define MAX_RANKS       0x4
  40 #define DDR3_MR0CF      0x80010011U
  41
  42 static unsigned long long ibm_currituck_memsize;
  43 static unsigned long long ibm_currituck_detect_memsize(void)
  44 {
  45         u32 reg;
  46         unsigned i;
  47         unsigned long long memsize = 0;
  48
  49         for(i = 0; i < MAX_RANKS; i++){
  50                 reg = mfdcrx(DDR3_MR0CF + i);
  51
  52                 if (!(reg & 1))
  53                         continue;
  54
  55                 reg &= 0x0000f000;
  56                 reg >>= 12;
  57                 memsize += (0x800000ULL << reg);
  58         }
  59
  60         return memsize;
  61 }
  62
  63 static void ibm_currituck_fixups(void)
  64 {
  65         void *devp = finddevice("/");
  66         u32 dma_ranges[7];
  67
  68         dt_fixup_memory(0x0ULL,  ibm_currituck_memsize);
  69
  70         while ((devp = find_node_by_devtype(devp, "pci"))) {
  71                 if (getprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)) < 0) {
  72                         printf("%s: Failed to get dma-ranges\r\n", __func__);
  73                         continue;
  74                 }
  75
  76                 dma_ranges[5] = ibm_currituck_memsize >> 32;
  77                 dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL;
  78
  79                 setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges));
  80         }
  81 }
  82
  83 #define SPRN_PIR        0x11E   /* Processor Indentification Register */
  84 void platform_init(void)
  85 {
  86         unsigned long end_of_ram, avail_ram;
  87         u32 pir_reg;
  88         int node, size;
  89         const u32 *timebase;
  90
  91         ibm_currituck_memsize = ibm_currituck_detect_memsize();
  92         if (ibm_currituck_memsize >> 32)
  93                 end_of_ram = ~0UL;
  94         else
  95                 end_of_ram = ibm_currituck_memsize;
  96         avail_ram = end_of_ram - (unsigned long)_end;
  97
  98         simple_alloc_init(_end, avail_ram, 128, 64);
  99         platform_ops.fixups = ibm_currituck_fixups;
 100         platform_ops.exit = ibm44x_dbcr_reset;
 101         pir_reg = mfspr(SPRN_PIR);
 102
 103         /* Make sure FDT blob is sane */
 104         if (fdt_check_header(_dtb_start) != 0)
 105                 fatal("Invalid device tree blob\n");
 106
 107         node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
 108                                              "cpu", sizeof("cpu"));
 109         if (!node)
 110                 fatal("Cannot find cpu node\n");
 111         timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
 112         if (timebase && (size == 4))
 113                 timebase_period_ns = 1000000000 / *timebase;
 114
 115         fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
 116         fdt_init(_dtb_start);
 117
 118         serial_console_init();
 119 }