1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright © 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 © 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
33 BSS_STACK(4096);
34
35 #define MAX_RANKS 0x4
36 #define DDR3_MR0CF 0x80010011U
37
38 static unsigned long long ibm_currituck_memsize;
39 static 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
59 static 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 */
80 void 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
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