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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
228d5505 TB |
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 | |
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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 | ||
446957ba | 79 | #define SPRN_PIR 0x11E /* Processor Identification Register */ |
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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 | } |