Commit | Line | Data |
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6a438309 AB |
1 | /* |
2 | * Pistachio platform setup | |
3 | * | |
4 | * Copyright (C) 2014 Google, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/of_address.h> | |
14 | #include <linux/of_fdt.h> | |
15 | #include <linux/of_platform.h> | |
16 | ||
17 | #include <asm/cacheflush.h> | |
18 | #include <asm/dma-coherence.h> | |
19 | #include <asm/fw/fw.h> | |
20 | #include <asm/mips-boards/generic.h> | |
21 | #include <asm/mips-cm.h> | |
22 | #include <asm/mips-cpc.h> | |
23 | #include <asm/prom.h> | |
24 | #include <asm/smp-ops.h> | |
25 | #include <asm/traps.h> | |
26 | ||
27 | const char *get_system_type(void) | |
28 | { | |
29 | return "IMG Pistachio SoC"; | |
30 | } | |
31 | ||
32 | static void __init plat_setup_iocoherency(void) | |
33 | { | |
34 | /* | |
35 | * Kernel has been configured with software coherency | |
36 | * but we might choose to turn it off and use hardware | |
37 | * coherency instead. | |
38 | */ | |
39 | if (mips_cm_numiocu() != 0) { | |
40 | /* Nothing special needs to be done to enable coherency */ | |
41 | pr_info("CMP IOCU detected\n"); | |
42 | hw_coherentio = 1; | |
43 | if (coherentio == 0) | |
44 | pr_info("Hardware DMA cache coherency disabled\n"); | |
45 | else | |
46 | pr_info("Hardware DMA cache coherency enabled\n"); | |
47 | } else { | |
48 | if (coherentio == 1) | |
49 | pr_info("Hardware DMA cache coherency unsupported, but enabled from command line!\n"); | |
50 | else | |
51 | pr_info("Software DMA cache coherency enabled\n"); | |
52 | } | |
53 | } | |
54 | ||
55 | void __init plat_mem_setup(void) | |
56 | { | |
57 | if (fw_arg0 != -2) | |
58 | panic("Device-tree not present"); | |
59 | ||
60 | __dt_setup_arch((void *)fw_arg1); | |
61 | strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
62 | ||
63 | plat_setup_iocoherency(); | |
64 | } | |
65 | ||
6b5e741e JH |
66 | #define DEFAULT_CPC_BASE_ADDR 0x1bde0000 |
67 | #define DEFAULT_CDMM_BASE_ADDR 0x1bdd0000 | |
6a438309 AB |
68 | |
69 | phys_addr_t mips_cpc_default_phys_base(void) | |
70 | { | |
71 | return DEFAULT_CPC_BASE_ADDR; | |
72 | } | |
73 | ||
6b5e741e JH |
74 | phys_addr_t mips_cdmm_phys_base(void) |
75 | { | |
76 | return DEFAULT_CDMM_BASE_ADDR; | |
77 | } | |
78 | ||
6a438309 AB |
79 | static void __init mips_nmi_setup(void) |
80 | { | |
81 | void *base; | |
82 | extern char except_vec_nmi; | |
83 | ||
84 | base = cpu_has_veic ? | |
85 | (void *)(CAC_BASE + 0xa80) : | |
86 | (void *)(CAC_BASE + 0x380); | |
87 | memcpy(base, &except_vec_nmi, 0x80); | |
88 | flush_icache_range((unsigned long)base, | |
89 | (unsigned long)base + 0x80); | |
90 | } | |
91 | ||
92 | static void __init mips_ejtag_setup(void) | |
93 | { | |
94 | void *base; | |
95 | extern char except_vec_ejtag_debug; | |
96 | ||
97 | base = cpu_has_veic ? | |
98 | (void *)(CAC_BASE + 0xa00) : | |
99 | (void *)(CAC_BASE + 0x300); | |
100 | memcpy(base, &except_vec_ejtag_debug, 0x80); | |
101 | flush_icache_range((unsigned long)base, | |
102 | (unsigned long)base + 0x80); | |
103 | } | |
104 | ||
105 | void __init prom_init(void) | |
106 | { | |
107 | board_nmi_handler_setup = mips_nmi_setup; | |
108 | board_ejtag_handler_setup = mips_ejtag_setup; | |
109 | ||
110 | mips_cm_probe(); | |
111 | mips_cpc_probe(); | |
112 | register_cps_smp_ops(); | |
113 | } | |
114 | ||
115 | void __init prom_free_prom_memory(void) | |
116 | { | |
117 | } | |
118 | ||
119 | void __init device_tree_init(void) | |
120 | { | |
121 | if (!initial_boot_params) | |
122 | return; | |
123 | ||
124 | unflatten_and_copy_device_tree(); | |
125 | } | |
126 | ||
127 | static int __init plat_of_setup(void) | |
128 | { | |
129 | if (!of_have_populated_dt()) | |
130 | panic("Device tree not present"); | |
131 | ||
132 | if (of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL)) | |
133 | panic("Failed to populate DT"); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | arch_initcall(plat_of_setup); |