cw1200: When debug is enabled, display all wakeup conditions for the wait_event_inter...
[firefly-linux-kernel-4.4.55.git] / arch / hexagon / kernel / setup.c
1 /*
2  * Arch related setup for Hexagon
3  *
4  * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 and
8  * only version 2 as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18  * 02110-1301, USA.
19  */
20
21 #include <linux/init.h>
22 #include <linux/bootmem.h>
23 #include <linux/mmzone.h>
24 #include <linux/mm.h>
25 #include <linux/seq_file.h>
26 #include <linux/console.h>
27 #include <linux/of_fdt.h>
28 #include <asm/io.h>
29 #include <asm/sections.h>
30 #include <asm/setup.h>
31 #include <asm/processor.h>
32 #include <asm/hexagon_vm.h>
33 #include <asm/vm_mmu.h>
34 #include <asm/time.h>
35 #ifdef CONFIG_OF
36 #include <asm/prom.h>
37 #endif
38
39 char cmd_line[COMMAND_LINE_SIZE];
40 static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
41
42 int on_simulator;
43
44 void __cpuinit calibrate_delay(void)
45 {
46         loops_per_jiffy = thread_freq_mhz * 1000000 / HZ;
47 }
48
49 /*
50  * setup_arch -  high level architectural setup routine
51  * @cmdline_p: pointer to pointer to command-line arguments
52  */
53
54 void __init setup_arch(char **cmdline_p)
55 {
56         char *p = &external_cmdline_buffer;
57
58         /*
59          * These will eventually be pulled in via either some hypervisor
60          * or devicetree description.  Hardwiring for now.
61          */
62         pcycle_freq_mhz = 600;
63         thread_freq_mhz = 100;
64         sleep_clk_freq = 32000;
65
66         /*
67          * Set up event bindings to handle exceptions and interrupts.
68          */
69         __vmsetvec(_K_VM_event_vector);
70
71         printk(KERN_INFO "PHYS_OFFSET=0x%08x\n", PHYS_OFFSET);
72
73         /*
74          * Simulator has a few differences from the hardware.
75          * For now, check uninitialized-but-mapped memory
76          * prior to invoking setup_arch_memory().
77          */
78         if (*(int *)((unsigned long)_end + 8) == 0x1f1f1f1f)
79                 on_simulator = 1;
80         else
81                 on_simulator = 0;
82
83         if (p[0] != '\0')
84                 strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
85         else
86                 strlcpy(boot_command_line, default_command_line,
87                         COMMAND_LINE_SIZE);
88
89         /*
90          * boot_command_line and the value set up by setup_arch
91          * are both picked up by the init code. If no reason to
92          * make them different, pass the same pointer back.
93          */
94         strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
95         *cmdline_p = cmd_line;
96
97         parse_early_param();
98
99         setup_arch_memory();
100
101 #ifdef CONFIG_SMP
102         smp_start_cpus();
103 #endif
104 }
105
106 /*
107  * Functions for dumping CPU info via /proc
108  * Probably should move to kernel/proc.c or something.
109  */
110 static void *c_start(struct seq_file *m, loff_t *pos)
111 {
112         return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
113 }
114
115 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
116 {
117         ++*pos;
118         return c_start(m, pos);
119 }
120
121 static void c_stop(struct seq_file *m, void *v)
122 {
123 }
124
125 /*
126  * Eventually this will dump information about
127  * CPU properties like ISA level, TLB size, etc.
128  */
129 static int show_cpuinfo(struct seq_file *m, void *v)
130 {
131         int cpu = (unsigned long) v - 1;
132
133 #ifdef CONFIG_SMP
134         if (!cpu_online(cpu))
135                 return 0;
136 #endif
137
138         seq_printf(m, "processor\t: %d\n", cpu);
139         seq_printf(m, "model name\t: Hexagon Virtual Machine\n");
140         seq_printf(m, "BogoMips\t: %lu.%02lu\n",
141                 (loops_per_jiffy * HZ) / 500000,
142                 ((loops_per_jiffy * HZ) / 5000) % 100);
143         seq_printf(m, "\n");
144         return 0;
145 }
146
147 const struct seq_operations cpuinfo_op = {
148         .start  = &c_start,
149         .next   = &c_next,
150         .stop   = &c_stop,
151         .show   = &show_cpuinfo,
152 };