Linux Kernel  3.7.1
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setup.c
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1 /*
2  * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
3  * reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses. You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the NetLogic
9  * license below:
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  * notice, this list of conditions and the following disclaimer in
19  * the documentation and/or other materials provided with the
20  * distribution.
21  *
22  * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 #include <linux/kernel.h>
36 #include <linux/serial_8250.h>
37 #include <linux/pm.h>
38 #include <linux/bootmem.h>
39 
40 #include <asm/reboot.h>
41 #include <asm/time.h>
42 #include <asm/bootinfo.h>
43 
44 #include <linux/of_fdt.h>
45 #include <linux/of_platform.h>
46 #include <linux/of_device.h>
47 
48 #include <asm/netlogic/haldefs.h>
49 #include <asm/netlogic/common.h>
50 
54 
55 unsigned long nlm_common_ebase = 0x0;
56 
57 /* default to uniprocessor */
60 extern u32 __dtb_start[];
61 
62 static void nlm_linux_exit(void)
63 {
65  for ( ; ; )
66  cpu_wait();
67 }
68 
70 {
71  panic_timeout = 5;
72  _machine_restart = (void (*)(char *))nlm_linux_exit;
73  _machine_halt = nlm_linux_exit;
74  pm_power_off = nlm_linux_exit;
75 }
76 
77 const char *get_system_type(void)
78 {
79  return "Netlogic XLP Series";
80 }
81 
83 {
84  /* Nothing yet */
85 }
86 
87 void xlp_mmu_init(void)
88 {
89  /* enable extended TLB and Large Fixed TLB */
91 
92  /* set page mask of Fixed TLB in config7 */
93  write_c0_config7(PM_DEFAULT_MASK >>
94  (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2)));
95 }
96 
97 void __init prom_init(void)
98 {
99  void *fdtp;
100 
101  xlp_mmu_init();
102  nlm_hal_init();
103 
104  /*
105  * If no FDT pointer is passed in, use the built-in FDT.
106  * device_tree_init() does not handle CKSEG0 pointers in
107  * 64-bit, so convert pointer.
108  */
109  fdtp = (void *)(long)fw_arg0;
110  if (!fdtp)
111  fdtp = __dtb_start;
112  fdtp = phys_to_virt(__pa(fdtp));
113  early_init_devtree(fdtp);
114 
115  nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
116 #ifdef CONFIG_SMP
117  nlm_wakeup_secondary_cpus(0xffffffff);
118 
119  /* update TLB size after waking up threads */
120  current_cpu_data.tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
121 
123 #endif
124 }
125 
127 {
128  unsigned long base, size;
129 
130  if (!initial_boot_params)
131  return;
132 
133  base = virt_to_phys((void *)initial_boot_params);
134  size = be32_to_cpu(initial_boot_params->totalsize);
135 
136  /* Before we do anything, lets reserve the dt blob */
137  reserve_bootmem(base, size, BOOTMEM_DEFAULT);
138 
139  unflatten_device_tree();
140 
141  /* free the space reserved for the dt blob */
142  free_bootmem(base, size);
143 }
144 
145 static struct of_device_id __initdata xlp_ids[] = {
146  { .compatible = "simple-bus", },
147  {},
148 };
149 
151 {
152  if (!of_have_populated_dt())
153  return 0;
154  return of_platform_bus_probe(NULL, xlp_ids, NULL);
155 }
156