1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright (c) 2014 Joyent, Inc. All rights reserved.
14 */
15
16 #include <sys/types.h>
17 #include <sys/bootconf.h>
18 #include <sys/obpdefs.h>
19 #include <sys/promif.h>
20
21 /*
22 * 32-bit Kernel's Virtual memory layout.
23 * +-----------------------+
24 * | exception table |
25 * 0xFFFF0000 -|-----------------------|- EXCEPTION_ADDRESS
26 * | |
27 * 0xFFC00000 -|-----------------------|- ARGSBASE
28 * | XXX debugger? |
29 * 0xFF800000 -|-----------------------|- XXX SEGDEBUBBASE?+
30 * | Kernel Data |
31 * 0xFEC00000 -|-----------------------|
32 * | Kernel Text |
33 * 0xFE800000 -|-----------------------|- KERNEL_TEXT
34 * | |
35 * | XXX No idea yet |
36 * | |
37 * 0xC8002000 -|-----------------------|- XXX segmap_start?
38 * | Red Zone |
39 * 0xC8000000 -|-----------------------|- kernelbase / userlimit (floating)
40 * | User Stack |
41 * | |
42 * | |
43 *
44 * : :
45 * | shared objects |
46 * : :
47 *
48 * : :
49 * | user data |
50 * -|-----------------------|-
51 * | user text |
52 * 0x00002000 -|-----------------------|- XXX Not necessairily truetoday
53 * | invalid |
54 * 0x00000000 -|-----------------------|-
55 *
56 * + Item does not exist at this time.
57 */
58
59 struct bootops *bootops = 0; /* passed in from boot */
60 struct bootops **bootopsp;
61 struct boot_syscalls *sysp; /* passed in from boot */
62
63 char kern_bootargs[OBP_MAXPATHLEN];
64 char kern_bootfile[OBP_MAXPATHLEN];
65
66 caddr_t s_text; /* start of kernel text segment */
67 caddr_t e_text; /* end of kernel text segment */
68 caddr_t s_data; /* start of kernel data segment */
69 caddr_t e_data; /* end of kernel data segment */
70 caddr_t modtext; /* start of loadable module text reserved */
71 caddr_t e_modtext; /* end of loadable module text reserved */
72 caddr_t moddata; /* start of loadable module data reserved */
73 caddr_t e_moddata; /* end of loadable module data reserved */
74
75 /*
76 * Some CPUs have holes in the middle of the 64-bit virtual address range.
77 */
78 uintptr_t hole_start, hole_end;
79
80 /*
81 * PROM debugging facilities
82 */
83 int prom_debug = 1;
84
85 /*
86 * VM related data
87 */
88 long page_hashsz; /* Size of page hash table (power of two) */
89 unsigned int page_hashsz_shift; /* log2(page_hashsz) */
90 struct page *pp_base; /* Base of initial system page struct array */
91 struct page **page_hash; /* Page hash table */
92 pad_mutex_t *pse_mutex; /* Locks protecting pp->p_selock */
93 size_t pse_table_size; /* Number of mutexes in pse_mutex[] */
94 int pse_shift; /* log2(pse_table_size) */
95
96 /*
97 * Cache size information filled in via cpuid and startup_cache()
98 */
99 int armv6_cachesz; /* Total size of the l1 cache */
100 int armv6_cache_assoc; /* L1 cache associativity */
101 int armv6_l2cache_linesz; /* Size of a line in the l2 cache */
102 int armv6_l2cache_size; /* Total size of the l2 cache */
103
104 /*
105 * Do basic set up.
106 */
107 static void
108 startup_init()
109 {
110 if (BOP_GETPROPLEN(bootops, "prom_debug") >= 0) {
111 ++prom_debug;
112 prom_printf("prom_debug found in boot enviroment");
113 }
114 }
115
116 static void
117 startup_memlist()
118 {
119 bop_panic("startup_memlist");
120 }
121
122 static void
123 startup_kmem()
124 {
125 bop_panic("startup_kmem");
126 }
127
128 static void
129 startup_vm()
130 {
131 bop_panic("startup_vm");
132 }
133
134 static void
135 startup_modules()
136 {
137 bop_panic("startup_modules");
138 }
139
140 static void
141 startup_end()
142 {
143 bop_panic("startup_end");
144 }
145
146 /*
147 * Our kernel text is at 0xfe800000, data at 0xfec000000, and exception vector
148 * at 0xffff0000. These addresses are all determined and set in stone at link
149 * time.
150 *
151 * This is the ARM machine-dependent startup code. Let's startup the world!
152 */
153 void
154 startup(void)
155 {
156 startup_init();
157 /* TODO if we ever need a board specific startup, it goes here */
158 startup_memlist();
159 startup_kmem();
160 startup_vm();
161 startup_modules();
162 startup_end();
163 }