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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright \xC2\xA9 2011 Tony Breeds IBM Corporation
   4 *
   5 * Based on earlier code:
   6 *   Copyright (C) Paul Mackerras 1997.
   7 *
   8 *   Matt Porter <mporter@kernel.crashing.org>
   9 *   Copyright 2002-2005 MontaVista Software Inc.
  10 *
  11 *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  12 *   Copyright (c) 2003, 2004 Zultys Technologies
  13 *
  14 *    Copyright 2007 David Gibson, IBM Corporation.
  15 *    Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
  16 *    Copyright \xC2\xA9 2011 David Kleikamp IBM Corporation
  17 */
  18#include <stdarg.h>
  19#include <stddef.h>
  20#include "types.h"
  21#include "elf.h"
  22#include "string.h"
  23#include "stdio.h"
  24#include "page.h"
  25#include "ops.h"
  26#include "reg.h"
  27#include "io.h"
  28#include "dcr.h"
  29#include "4xx.h"
  30#include "44x.h"
  31#include "libfdt.h"
  32
  33BSS_STACK(4096);
  34
  35#define MAX_RANKS       0x4
  36#define DDR3_MR0CF      0x80010011U
  37
  38static unsigned long long ibm_currituck_memsize;
  39static unsigned long long ibm_currituck_detect_memsize(void)
  40{
  41        u32 reg;
  42        unsigned i;
  43        unsigned long long memsize = 0;
  44
  45        for(i = 0; i < MAX_RANKS; i++){
  46                reg = mfdcrx(DDR3_MR0CF + i);
  47
  48                if (!(reg & 1))
  49                        continue;
  50
  51                reg &= 0x0000f000;
  52                reg >>= 12;
  53                memsize += (0x800000ULL << reg);
  54        }
  55
  56        return memsize;
  57}
  58
  59static void ibm_currituck_fixups(void)
  60{
  61        void *devp = finddevice("/");
  62        u32 dma_ranges[7];
  63
  64        dt_fixup_memory(0x0ULL,  ibm_currituck_memsize);
  65
  66        while ((devp = find_node_by_devtype(devp, "pci"))) {
  67                if (getprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)) < 0) {
  68                        printf("%s: Failed to get dma-ranges\r\n", __func__);
  69                        continue;
  70                }
  71
  72                dma_ranges[5] = ibm_currituck_memsize >> 32;
  73                dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL;
  74
  75                setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges));
  76        }
  77}
  78
  79#define SPRN_PIR        0x11E   /* Processor Identification Register */
  80void platform_init(void)
  81{
  82        unsigned long end_of_ram, avail_ram;
  83        u32 pir_reg;
  84        int node, size;
  85        const u32 *timebase;
  86
  87        ibm_currituck_memsize = ibm_currituck_detect_memsize();
  88        if (ibm_currituck_memsize >> 32)
  89                end_of_ram = ~0UL;
  90        else
  91                end_of_ram = ibm_currituck_memsize;
  92        avail_ram = end_of_ram - (unsigned long)_end;
  93
  94        simple_alloc_init(_end, avail_ram, 128, 64);
  95        platform_ops.fixups = ibm_currituck_fixups;
  96        platform_ops.exit = ibm44x_dbcr_reset;
  97        pir_reg = mfspr(SPRN_PIR);
  98
  99        /* Make sure FDT blob is sane */
 100        if (fdt_check_header(_dtb_start) != 0)
 101                fatal("Invalid device tree blob\n");
 102
 103        node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
 104                                             "cpu", sizeof("cpu"));
 105        if (!node)
 106                fatal("Cannot find cpu node\n");
 107        timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
 108        if (timebase && (size == 4))
 109                timebase_period_ns = 1000000000 / *timebase;
 110
 111        fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
 112        fdt_init(_dtb_start);
 113
 114        serial_console_init();
 115}
 116