release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/boot/ep405.c

   1 /*
   2  * Embedded Planet EP405 with PlanetCore firmware
   3  *
   4  * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
   5  *
   6  * Based on ep88xc.c by
   7  *
   8  * Scott Wood <scottwood@freescale.com>
   9  *
  10  * Copyright (c) 2007 Freescale Semiconductor, Inc.
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License version 2 as published
  14  * by the Free Software Foundation.
  15  */
  16
  17 #include "ops.h"
  18 #include "stdio.h"
  19 #include "planetcore.h"
  20 #include "dcr.h"
  21 #include "4xx.h"
  22 #include "io.h"
  23
  24 static char *table;
  25 static u64 mem_size;
  26
  27 static void platform_fixups(void)
  28 {
  29         u64 val;
  30         void *nvrtc;
  31
  32         dt_fixup_memory(0, mem_size);
  33         planetcore_set_mac_addrs(table);
  34
  35         if (!planetcore_get_decimal(table, PLANETCORE_KEY_CRYSTAL_HZ, &val)) {
  36                 printf("No PlanetCore crystal frequency key.\r\n");
  37                 return;
  38         }
  39         ibm405gp_fixup_clocks(val, 0xa8c000);
  40         ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
  41         ibm4xx_fixup_ebc_ranges("/plb/ebc");
  42
  43         if (!planetcore_get_decimal(table, PLANETCORE_KEY_KB_NVRAM, &val)) {
  44                 printf("No PlanetCore NVRAM size key.\r\n");
  45                 return;
  46         }
  47         nvrtc = finddevice("/plb/ebc/nvrtc@4,200000");
  48         if (nvrtc != NULL) {
  49                 u32 reg[3] = { 4, 0x200000, 0};
  50                 getprop(nvrtc, "reg", reg, 3);
  51                 reg[2] = (val << 10) & 0xffffffff;
  52                 setprop(nvrtc, "reg", reg, 3);
  53         }
  54 }
  55
  56 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  57                    unsigned long r6, unsigned long r7)
  58 {
  59         table = (char *)r3;
  60         planetcore_prepare_table(table);
  61
  62         if (!planetcore_get_decimal(table, PLANETCORE_KEY_MB_RAM, &mem_size))
  63                 return;
  64
  65         mem_size *= 1024 * 1024;
  66         simple_alloc_init(_end, mem_size - (unsigned long)_end, 32, 64);
  67
  68         fdt_init(_dtb_start);
  69
  70         planetcore_set_stdout_path(table);
  71
  72         serial_console_init();
  73         platform_ops.fixups = platform_fixups;
  74 }