LXR linux/arch/powerpc/boot/treeboot-walnut.c

   1/*
   2 * Old U-boot compatibility for Walnut
   3 *
   4 * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
   5 *
   6 * Copyright 2007 IBM Corporation
   7 *   Based on cuboot-83xx.c, which is:
   8 * Copyright (c) 2007 Freescale Semiconductor, Inc.
   9 *
  10 * This program is free software; you can redistribute it and/or modify it
  11 * under the terms of the GNU General Public License version 2 as published
  12 * by the Free Software Foundation.
  13 */
  14
  15#include "ops.h"
  16#include "stdio.h"
  17#include "dcr.h"
  18#include "4xx.h"
  19#include "io.h"
  20
  21BSS_STACK(4096);
  22
  23static void walnut_flashsel_fixup(void)
  24{
  25        void *devp, *sram;
  26        u32 reg_flash[3] = {0x0, 0x0, 0x80000};
  27        u32 reg_sram[3] = {0x0, 0x0, 0x80000};
  28        u8 *fpga;
  29        u8 fpga_brds1 = 0x0;
  30
  31        devp = finddevice("/plb/ebc/fpga");
  32        if (!devp)
  33                fatal("Couldn't locate FPGA node\n\r");
  34
  35        if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
  36                fatal("no virtual-reg property\n\r");
  37
  38        fpga_brds1 = in_8(fpga);
  39
  40        devp = finddevice("/plb/ebc/flash");
  41        if (!devp)
  42                fatal("Couldn't locate flash node\n\r");
  43
  44        if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash))
  45                fatal("flash reg property has unexpected size\n\r");
  46
  47        sram = finddevice("/plb/ebc/sram");
  48        if (!sram)
  49                fatal("Couldn't locate sram node\n\r");
  50
  51        if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram))
  52                fatal("sram reg property has unexpected size\n\r");
  53
  54        if (fpga_brds1 & 0x1) {
  55                reg_flash[1] ^= 0x80000;
  56                reg_sram[1] ^= 0x80000;
  57        }
  58
  59        setprop(devp, "reg", reg_flash, sizeof(reg_flash));
  60        setprop(sram, "reg", reg_sram, sizeof(reg_sram));
  61}
  62
  63#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
  64static void walnut_fixups(void)
  65{
  66        ibm4xx_sdram_fixup_memsize();
  67        ibm405gp_fixup_clocks(33330000, 0xa8c000);
  68        ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
  69        ibm4xx_fixup_ebc_ranges("/plb/ebc");
  70        walnut_flashsel_fixup();
  71        dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF);
  72}
  73
  74void platform_init(void)
  75{
  76        unsigned long end_of_ram = 0x2000000;
  77        unsigned long avail_ram = end_of_ram - (unsigned long) _end;
  78
  79        simple_alloc_init(_end, avail_ram, 32, 32);
  80        platform_ops.fixups = walnut_fixups;
  81        platform_ops.exit = ibm40x_dbcr_reset;
  82        fdt_init(_dtb_start);
  83        serial_console_init();
  84}
  85