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;
ibm_currituck_detect_memsize(void)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
ibm_currituck_fixups(void)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 Identification Register */
platform_init(void)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 }
120
