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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/delay.h>
23#include <linux/bootmem.h>
24#include <linux/mmzone.h>
25#include <linux/mm.h>
26#include <linux/seq_file.h>
27#include <linux/console.h>
28#include <linux/of_fdt.h>
29#include <asm/io.h>
30#include <asm/sections.h>
31#include <asm/setup.h>
32#include <asm/processor.h>
33#include <asm/hexagon_vm.h>
34#include <asm/vm_mmu.h>
35#include <asm/time.h>
36
37char cmd_line[COMMAND_LINE_SIZE];
38static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
39
40int on_simulator;
41
42void calibrate_delay(void)
43{
44 loops_per_jiffy = thread_freq_mhz * 1000000 / HZ;
45}
46
47/*
48 * setup_arch - high level architectural setup routine
49 * @cmdline_p: pointer to pointer to command-line arguments
50 */
51
52void __init setup_arch(char **cmdline_p)
53{
54 char *p = &external_cmdline_buffer;
55
56 /*
57 * These will eventually be pulled in via either some hypervisor
58 * or devicetree description. Hardwiring for now.
59 */
60 pcycle_freq_mhz = 600;
61 thread_freq_mhz = 100;
62 sleep_clk_freq = 32000;
63
64 /*
65 * Set up event bindings to handle exceptions and interrupts.
66 */
67 __vmsetvec(_K_VM_event_vector);
68
69 printk(KERN_INFO "PHYS_OFFSET=0x%08x\n", PHYS_OFFSET);
70
71 /*
72 * Simulator has a few differences from the hardware.
73 * For now, check uninitialized-but-mapped memory
74 * prior to invoking setup_arch_memory().
75 */
76 if (*(int *)((unsigned long)_end + 8) == 0x1f1f1f1f)
77 on_simulator = 1;
78 else
79 on_simulator = 0;
80
81 if (p[0] != '\0')
82 strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
83 else
84 strlcpy(boot_command_line, default_command_line,
85 COMMAND_LINE_SIZE);
86
87 /*
88 * boot_command_line and the value set up by setup_arch
89 * are both picked up by the init code. If no reason to
90 * make them different, pass the same pointer back.
91 */
92 strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
93 *cmdline_p = cmd_line;
94
95 parse_early_param();
96
97 setup_arch_memory();
98
99#ifdef CONFIG_SMP
100 smp_start_cpus();
101#endif
102}
103
104/*
105 * Functions for dumping CPU info via /proc
106 * Probably should move to kernel/proc.c or something.
107 */
108static void *c_start(struct seq_file *m, loff_t *pos)
109{
110 return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
111}
112
113static void *c_next(struct seq_file *m, void *v, loff_t *pos)
114{
115 ++*pos;
116 return c_start(m, pos);
117}
118
119static void c_stop(struct seq_file *m, void *v)
120{
121}
122
123/*
124 * Eventually this will dump information about
125 * CPU properties like ISA level, TLB size, etc.
126 */
127static int show_cpuinfo(struct seq_file *m, void *v)
128{
129 int cpu = (unsigned long) v - 1;
130
131#ifdef CONFIG_SMP
132 if (!cpu_online(cpu))
133 return 0;
134#endif
135
136 seq_printf(m, "processor\t: %d\n", cpu);
137 seq_printf(m, "model name\t: Hexagon Virtual Machine\n");
138 seq_printf(m, "BogoMips\t: %lu.%02lu\n",
139 (loops_per_jiffy * HZ) / 500000,
140 ((loops_per_jiffy * HZ) / 5000) % 100);
141 seq_printf(m, "\n");
142 return 0;
143}
144
145const struct seq_operations cpuinfo_op = {
146 .start = &c_start,
147 .next = &c_next,
148 .stop = &c_stop,
149 .show = &show_cpuinfo,
150};
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
36char cmd_line[COMMAND_LINE_SIZE];
37static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
38
39int on_simulator;
40
41void calibrate_delay(void)
42{
43 loops_per_jiffy = thread_freq_mhz * 1000000 / HZ;
44}
45
46/*
47 * setup_arch - high level architectural setup routine
48 * @cmdline_p: pointer to pointer to command-line arguments
49 */
50
51void __init setup_arch(char **cmdline_p)
52{
53 char *p = &external_cmdline_buffer;
54
55 /*
56 * These will eventually be pulled in via either some hypervisor
57 * or devicetree description. Hardwiring for now.
58 */
59 pcycle_freq_mhz = 600;
60 thread_freq_mhz = 100;
61 sleep_clk_freq = 32000;
62
63 /*
64 * Set up event bindings to handle exceptions and interrupts.
65 */
66 __vmsetvec(_K_VM_event_vector);
67
68 printk(KERN_INFO "PHYS_OFFSET=0x%08x\n", PHYS_OFFSET);
69
70 /*
71 * Simulator has a few differences from the hardware.
72 * For now, check uninitialized-but-mapped memory
73 * prior to invoking setup_arch_memory().
74 */
75 if (*(int *)((unsigned long)_end + 8) == 0x1f1f1f1f)
76 on_simulator = 1;
77 else
78 on_simulator = 0;
79
80 if (p[0] != '\0')
81 strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
82 else
83 strlcpy(boot_command_line, default_command_line,
84 COMMAND_LINE_SIZE);
85
86 /*
87 * boot_command_line and the value set up by setup_arch
88 * are both picked up by the init code. If no reason to
89 * make them different, pass the same pointer back.
90 */
91 strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
92 *cmdline_p = cmd_line;
93
94 parse_early_param();
95
96 setup_arch_memory();
97
98#ifdef CONFIG_SMP
99 smp_start_cpus();
100#endif
101}
102
103/*
104 * Functions for dumping CPU info via /proc
105 * Probably should move to kernel/proc.c or something.
106 */
107static void *c_start(struct seq_file *m, loff_t *pos)
108{
109 return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
110}
111
112static void *c_next(struct seq_file *m, void *v, loff_t *pos)
113{
114 ++*pos;
115 return c_start(m, pos);
116}
117
118static void c_stop(struct seq_file *m, void *v)
119{
120}
121
122/*
123 * Eventually this will dump information about
124 * CPU properties like ISA level, TLB size, etc.
125 */
126static int show_cpuinfo(struct seq_file *m, void *v)
127{
128 int cpu = (unsigned long) v - 1;
129
130#ifdef CONFIG_SMP
131 if (!cpu_online(cpu))
132 return 0;
133#endif
134
135 seq_printf(m, "processor\t: %d\n", cpu);
136 seq_printf(m, "model name\t: Hexagon Virtual Machine\n");
137 seq_printf(m, "BogoMips\t: %lu.%02lu\n",
138 (loops_per_jiffy * HZ) / 500000,
139 ((loops_per_jiffy * HZ) / 5000) % 100);
140 seq_printf(m, "\n");
141 return 0;
142}
143
144const struct seq_operations cpuinfo_op = {
145 .start = &c_start,
146 .next = &c_next,
147 .stop = &c_stop,
148 .show = &show_cpuinfo,
149};