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2a2c74b2 AP |
1 | /* |
2 | * Copyright © 2013 Tony Breeds IBM Corporation | |
3 | * Copyright © 2013 Alistair Popple 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 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | */ | |
23 | #include <stdarg.h> | |
24 | #include <stddef.h> | |
25 | #include "types.h" | |
26 | #include "elf.h" | |
27 | #include "string.h" | |
28 | #include "stdlib.h" | |
29 | #include "stdio.h" | |
30 | #include "page.h" | |
31 | #include "ops.h" | |
32 | #include "reg.h" | |
33 | #include "io.h" | |
34 | #include "dcr.h" | |
35 | #include "4xx.h" | |
36 | #include "44x.h" | |
37 | #include "libfdt.h" | |
38 | ||
39 | BSS_STACK(4096); | |
40 | ||
41 | #define SPRN_PIR 0x11E /* Processor Indentification Register */ | |
42 | #define USERDATA_LEN 256 /* Length of userdata passed in by PIBS */ | |
43 | #define MAX_RANKS 0x4 | |
44 | #define DDR3_MR0CF 0x80010011U | |
45 | #define CCTL0_MCO2 0x8000080FU | |
46 | #define CCTL0_MCO3 0x80000810U | |
47 | #define CCTL0_MCO4 0x80000811U | |
48 | #define CCTL0_MCO5 0x80000812U | |
49 | #define CCTL0_MCO6 0x80000813U | |
50 | ||
51 | static unsigned long long ibm_akebono_memsize; | |
52 | static long long unsigned mac_addr; | |
53 | ||
54 | static unsigned long long ibm_akebono_detect_memsize(void) | |
55 | { | |
56 | u32 reg; | |
57 | unsigned i; | |
58 | unsigned long long memsize = 0; | |
59 | ||
60 | for (i = 0; i < MAX_RANKS; i++) { | |
61 | reg = mfdcrx(DDR3_MR0CF + i); | |
62 | ||
63 | if (!(reg & 1)) | |
64 | continue; | |
65 | ||
66 | reg &= 0x0000f000; | |
67 | reg >>= 12; | |
68 | memsize += (0x800000ULL << reg); | |
69 | } | |
70 | ||
71 | return memsize; | |
72 | } | |
73 | ||
74 | static void ibm_akebono_fixups(void) | |
75 | { | |
76 | void *emac; | |
77 | u32 reg; | |
2a2c74b2 AP |
78 | |
79 | dt_fixup_memory(0x0ULL, ibm_akebono_memsize); | |
80 | ||
2a2c74b2 AP |
81 | /* Fixup the SD timeout frequency */ |
82 | mtdcrx(CCTL0_MCO4, 0x1); | |
83 | ||
84 | /* Disable SD high-speed mode (which seems to be broken) */ | |
85 | reg = mfdcrx(CCTL0_MCO2) & ~0x2; | |
86 | mtdcrx(CCTL0_MCO2, reg); | |
87 | ||
88 | /* Set the MAC address */ | |
89 | emac = finddevice("/plb/opb/ethernet"); | |
90 | if (emac > 0) { | |
91 | if (mac_addr) | |
92 | setprop(emac, "local-mac-address", | |
93 | ((u8 *) &mac_addr) + 2 , 6); | |
94 | } | |
95 | } | |
96 | ||
97 | void platform_init(char *userdata) | |
98 | { | |
99 | unsigned long end_of_ram, avail_ram; | |
100 | u32 pir_reg; | |
101 | int node, size; | |
102 | const u32 *timebase; | |
103 | int len, i, userdata_len; | |
104 | char *end; | |
105 | ||
106 | userdata[USERDATA_LEN - 1] = '\0'; | |
107 | userdata_len = strlen(userdata); | |
108 | for (i = 0; i < userdata_len - 15; i++) { | |
109 | if (strncmp(&userdata[i], "local-mac-addr=", 15) == 0) { | |
110 | if (i > 0 && userdata[i - 1] != ' ') { | |
111 | /* We've only found a substring ending | |
112 | * with local-mac-addr so this isn't | |
113 | * our mac address. */ | |
114 | continue; | |
115 | } | |
116 | ||
117 | mac_addr = strtoull(&userdata[i + 15], &end, 16); | |
118 | ||
119 | /* Remove the "local-mac-addr=<...>" from the kernel | |
120 | * command line, including the tailing space if | |
121 | * present. */ | |
122 | if (*end == ' ') | |
123 | end++; | |
124 | ||
125 | len = ((int) end) - ((int) &userdata[i]); | |
126 | memmove(&userdata[i], end, | |
127 | userdata_len - (len + i) + 1); | |
128 | break; | |
129 | } | |
130 | } | |
131 | ||
132 | loader_info.cmdline = userdata; | |
133 | loader_info.cmdline_len = 256; | |
134 | ||
135 | ibm_akebono_memsize = ibm_akebono_detect_memsize(); | |
136 | if (ibm_akebono_memsize >> 32) | |
137 | end_of_ram = ~0UL; | |
138 | else | |
139 | end_of_ram = ibm_akebono_memsize; | |
140 | avail_ram = end_of_ram - (unsigned long)_end; | |
141 | ||
142 | simple_alloc_init(_end, avail_ram, 128, 64); | |
143 | platform_ops.fixups = ibm_akebono_fixups; | |
144 | platform_ops.exit = ibm44x_dbcr_reset; | |
145 | pir_reg = mfspr(SPRN_PIR); | |
146 | ||
147 | /* Make sure FDT blob is sane */ | |
148 | if (fdt_check_header(_dtb_start) != 0) | |
149 | fatal("Invalid device tree blob\n"); | |
150 | ||
151 | node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type", | |
152 | "cpu", sizeof("cpu")); | |
153 | if (!node) | |
154 | fatal("Cannot find cpu node\n"); | |
155 | timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size); | |
156 | if (timebase && (size == 4)) | |
157 | timebase_period_ns = 1000000000 / *timebase; | |
158 | ||
159 | fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); | |
160 | fdt_init(_dtb_start); | |
161 | ||
162 | serial_console_init(); | |
163 | } |