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1/*
2 * linux/arch/h8300/kernel/setup.c
3 *
4 * Copyright (C) 2001-2014 Yoshinori Sato <ysato@users.sourceforge.jp>
5 */
6
7/*
8 * This file handles the architecture-dependent parts of system setup
9 */
10
11#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/delay.h>
14#include <linux/interrupt.h>
15#include <linux/mm.h>
16#include <linux/fs.h>
17#include <linux/console.h>
18#include <linux/errno.h>
19#include <linux/string.h>
20#include <linux/bootmem.h>
21#include <linux/seq_file.h>
22#include <linux/init.h>
23#include <linux/of.h>
24#include <linux/of_fdt.h>
25#include <linux/of_platform.h>
26#include <linux/of_address.h>
27#include <linux/clk-provider.h>
28#include <linux/memblock.h>
29#include <linux/screen_info.h>
30#include <linux/clocksource.h>
31
32#include <asm/setup.h>
33#include <asm/irq.h>
34#include <asm/pgtable.h>
35#include <asm/sections.h>
36#include <asm/page.h>
37
38#if defined(CONFIG_CPU_H8300H)
39#define CPU "H8/300H"
40#elif defined(CONFIG_CPU_H8S)
41#define CPU "H8S"
42#else
43#define CPU "Unknown"
44#endif
45
46unsigned long memory_start;
47unsigned long memory_end;
48EXPORT_SYMBOL(memory_end);
49static unsigned long freq;
50extern char __dtb_start[];
51
52#ifdef CONFIG_VT
53struct screen_info screen_info;
54#endif
55
56char __initdata command_line[COMMAND_LINE_SIZE];
57
58void sim_console_register(void);
59
60void __init h8300_fdt_init(void *fdt, char *bootargs)
61{
62 if (!fdt)
63 fdt = __dtb_start;
64 else
65 strcpy(command_line, bootargs);
66
67 early_init_dt_scan(fdt);
68 memblock_allow_resize();
69}
70
71static void __init bootmem_init(void)
72{
73 int bootmap_size;
74 unsigned long ram_start_pfn;
75 unsigned long free_ram_start_pfn;
76 unsigned long ram_end_pfn;
77 struct memblock_region *region;
78
79 memory_end = memory_start = 0;
80
81 /* Find main memory where is the kernel */
82 for_each_memblock(memory, region) {
83 memory_start = region->base;
84 memory_end = region->base + region->size;
85 }
86
87 if (!memory_end)
88 panic("No memory!");
89
90 ram_start_pfn = PFN_UP(memory_start);
91 /* free_ram_start_pfn is first page after kernel */
92 free_ram_start_pfn = PFN_UP(__pa(_end));
93 ram_end_pfn = PFN_DOWN(memblock_end_of_DRAM());
94
95 max_pfn = ram_end_pfn;
96
97 /*
98 * give all the memory to the bootmap allocator, tell it to put the
99 * boot mem_map at the start of memory
100 */
101 bootmap_size = init_bootmem_node(NODE_DATA(0),
102 free_ram_start_pfn,
103 0,
104 ram_end_pfn);
105 /*
106 * free the usable memory, we have to make sure we do not free
107 * the bootmem bitmap so we then reserve it after freeing it :-)
108 */
109 free_bootmem(PFN_PHYS(free_ram_start_pfn),
110 (ram_end_pfn - free_ram_start_pfn) << PAGE_SHIFT);
111 reserve_bootmem(PFN_PHYS(free_ram_start_pfn), bootmap_size,
112 BOOTMEM_DEFAULT);
113
114 for_each_memblock(reserved, region) {
115 reserve_bootmem(region->base, region->size, BOOTMEM_DEFAULT);
116 }
117}
118
119void __init setup_arch(char **cmdline_p)
120{
121 unflatten_and_copy_device_tree();
122
123 init_mm.start_code = (unsigned long) _stext;
124 init_mm.end_code = (unsigned long) _etext;
125 init_mm.end_data = (unsigned long) _edata;
126 init_mm.brk = (unsigned long) 0;
127
128 pr_notice("\r\n\nuClinux " CPU "\n");
129 pr_notice("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
130
131 if (*command_line)
132 strcpy(boot_command_line, command_line);
133 *cmdline_p = boot_command_line;
134
135 parse_early_param();
136
137 bootmem_init();
138 /*
139 * get kmalloc into gear
140 */
141 paging_init();
142}
143
144/*
145 * Get CPU information for use by the procfs.
146 */
147
148static int show_cpuinfo(struct seq_file *m, void *v)
149{
150 char *cpu;
151
152 cpu = CPU;
153
154 seq_printf(m, "CPU:\t\t%s\n"
155 "Clock:\t\t%lu.%1luMHz\n"
156 "BogoMips:\t%lu.%02lu\n"
157 "Calibration:\t%lu loops\n",
158 cpu,
159 freq/1000, freq%1000,
160 (loops_per_jiffy*HZ)/500000,
161 ((loops_per_jiffy*HZ)/5000)%100,
162 (loops_per_jiffy*HZ));
163
164 return 0;
165}
166
167static void *c_start(struct seq_file *m, loff_t *pos)
168{
169 return *pos < num_possible_cpus() ?
170 ((void *) 0x12345678) : NULL;
171}
172
173static void *c_next(struct seq_file *m, void *v, loff_t *pos)
174{
175 ++*pos;
176 return c_start(m, pos);
177}
178
179static void c_stop(struct seq_file *m, void *v)
180{
181}
182
183const struct seq_operations cpuinfo_op = {
184 .start = c_start,
185 .next = c_next,
186 .stop = c_stop,
187 .show = show_cpuinfo,
188};
189
190static int __init device_probe(void)
191{
192 of_platform_populate(NULL, NULL, NULL, NULL);
193
194 return 0;
195}
196
197device_initcall(device_probe);
198
199#if defined(CONFIG_CPU_H8300H)
200#define get_wait(base, addr) ({ \
201 int baddr; \
202 baddr = ((addr) / 0x200000 * 2); \
203 w *= (readw((base) + 2) & (3 << baddr)) + 1; \
204 })
205#endif
206#if defined(CONFIG_CPU_H8S)
207#define get_wait(base, addr) ({ \
208 int baddr; \
209 baddr = ((addr) / 0x200000 * 16); \
210 w *= (readl((base) + 2) & (7 << baddr)) + 1; \
211 })
212#endif
213
214static __init int access_timing(void)
215{
216 struct device_node *bsc;
217 void __iomem *base;
218 unsigned long addr = (unsigned long)&__delay;
219 int bit = 1 << (addr / 0x200000);
220 int w;
221
222 bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
223 base = of_iomap(bsc, 0);
224 w = (readb(base + 0) & bit)?2:1;
225 if (readb(base + 1) & bit)
226 w *= get_wait(base, addr);
227 else
228 w *= 2;
229 return w * 3 / 2;
230}
231
232void __init calibrate_delay(void)
233{
234 struct device_node *cpu;
235 int freq;
236
237 cpu = of_find_compatible_node(NULL, NULL, "renesas,h8300");
238 of_property_read_s32(cpu, "clock-frequency", &freq);
239 loops_per_jiffy = freq / HZ / (access_timing() * 2);
240 pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n",
241 loops_per_jiffy / (500000 / HZ),
242 (loops_per_jiffy / (5000 / HZ)) % 100, loops_per_jiffy);
243}
244
245
246void __init time_init(void)
247{
248 of_clk_init(NULL);
249 clocksource_probe();
250}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/h8300/kernel/setup.c
4 *
5 * Copyright (C) 2001-2014 Yoshinori Sato <ysato@users.sourceforge.jp>
6 */
7
8/*
9 * This file handles the architecture-dependent parts of system setup
10 */
11
12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/delay.h>
15#include <linux/interrupt.h>
16#include <linux/io.h>
17#include <linux/mm.h>
18#include <linux/fs.h>
19#include <linux/console.h>
20#include <linux/errno.h>
21#include <linux/string.h>
22#include <linux/seq_file.h>
23#include <linux/init.h>
24#include <linux/of.h>
25#include <linux/of_fdt.h>
26#include <linux/of_address.h>
27#include <linux/clk-provider.h>
28#include <linux/memblock.h>
29#include <linux/screen_info.h>
30#include <linux/clocksource.h>
31
32#include <asm/setup.h>
33#include <asm/irq.h>
34#include <asm/pgtable.h>
35#include <asm/sections.h>
36#include <asm/page.h>
37
38#if defined(CONFIG_CPU_H8300H)
39#define CPU "H8/300H"
40#elif defined(CONFIG_CPU_H8S)
41#define CPU "H8S"
42#else
43#define CPU "Unknown"
44#endif
45
46unsigned long memory_start;
47unsigned long memory_end;
48EXPORT_SYMBOL(memory_end);
49static unsigned long freq;
50extern char __dtb_start[];
51
52#ifdef CONFIG_VT
53struct screen_info screen_info;
54#endif
55
56char __initdata command_line[COMMAND_LINE_SIZE];
57
58void sim_console_register(void);
59
60void __init h8300_fdt_init(void *fdt, char *bootargs)
61{
62 if (!fdt)
63 fdt = __dtb_start;
64 else
65 strcpy(command_line, bootargs);
66
67 early_init_dt_scan(fdt);
68 memblock_allow_resize();
69}
70
71static void __init bootmem_init(void)
72{
73 struct memblock_region *region;
74
75 memory_end = memory_start = 0;
76
77 /* Find main memory where is the kernel */
78 for_each_memblock(memory, region) {
79 memory_start = region->base;
80 memory_end = region->base + region->size;
81 }
82
83 if (!memory_end)
84 panic("No memory!");
85
86 /* setup bootmem globals (we use no_bootmem, but mm still depends on this) */
87 min_low_pfn = PFN_UP(memory_start);
88 max_low_pfn = PFN_DOWN(memblock_end_of_DRAM());
89 max_pfn = max_low_pfn;
90
91 memblock_reserve(__pa(_stext), _end - _stext);
92
93 early_init_fdt_reserve_self();
94 early_init_fdt_scan_reserved_mem();
95
96 memblock_dump_all();
97}
98
99void __init setup_arch(char **cmdline_p)
100{
101 unflatten_and_copy_device_tree();
102
103 init_mm.start_code = (unsigned long) _stext;
104 init_mm.end_code = (unsigned long) _etext;
105 init_mm.end_data = (unsigned long) _edata;
106 init_mm.brk = (unsigned long) 0;
107
108 pr_notice("\r\n\nuClinux " CPU "\n");
109 pr_notice("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
110
111 if (*command_line)
112 strcpy(boot_command_line, command_line);
113 *cmdline_p = boot_command_line;
114
115 parse_early_param();
116
117 bootmem_init();
118 /*
119 * get kmalloc into gear
120 */
121 paging_init();
122}
123
124/*
125 * Get CPU information for use by the procfs.
126 */
127
128static int show_cpuinfo(struct seq_file *m, void *v)
129{
130 char *cpu;
131
132 cpu = CPU;
133
134 seq_printf(m, "CPU:\t\t%s\n"
135 "Clock:\t\t%lu.%1luMHz\n"
136 "BogoMips:\t%lu.%02lu\n"
137 "Calibration:\t%lu loops\n",
138 cpu,
139 freq/1000, freq%1000,
140 (loops_per_jiffy*HZ)/500000,
141 ((loops_per_jiffy*HZ)/5000)%100,
142 (loops_per_jiffy*HZ));
143
144 return 0;
145}
146
147static void *c_start(struct seq_file *m, loff_t *pos)
148{
149 return *pos < num_possible_cpus() ?
150 ((void *) 0x12345678) : NULL;
151}
152
153static void *c_next(struct seq_file *m, void *v, loff_t *pos)
154{
155 ++*pos;
156 return c_start(m, pos);
157}
158
159static void c_stop(struct seq_file *m, void *v)
160{
161}
162
163const struct seq_operations cpuinfo_op = {
164 .start = c_start,
165 .next = c_next,
166 .stop = c_stop,
167 .show = show_cpuinfo,
168};
169
170#if defined(CONFIG_CPU_H8300H)
171#define get_wait(base, addr) ({ \
172 int baddr; \
173 baddr = ((addr) / 0x200000 * 2); \
174 w *= (readw((base) + 2) & (3 << baddr)) + 1; \
175 })
176#endif
177#if defined(CONFIG_CPU_H8S)
178#define get_wait(base, addr) ({ \
179 int baddr; \
180 baddr = ((addr) / 0x200000 * 16); \
181 w *= (readl((base) + 2) & (7 << baddr)) + 1; \
182 })
183#endif
184
185static __init int access_timing(void)
186{
187 struct device_node *bsc;
188 void __iomem *base;
189 unsigned long addr = (unsigned long)&__delay;
190 int bit = 1 << (addr / 0x200000);
191 int w;
192
193 bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
194 base = of_iomap(bsc, 0);
195 w = (readb(base + 0) & bit)?2:1;
196 if (readb(base + 1) & bit)
197 w *= get_wait(base, addr);
198 else
199 w *= 2;
200 return w * 3 / 2;
201}
202
203void __init calibrate_delay(void)
204{
205 struct device_node *cpu;
206 int freq;
207
208 cpu = of_find_compatible_node(NULL, NULL, "renesas,h8300");
209 of_property_read_s32(cpu, "clock-frequency", &freq);
210 loops_per_jiffy = freq / HZ / (access_timing() * 2);
211 pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n",
212 loops_per_jiffy / (500000 / HZ),
213 (loops_per_jiffy / (5000 / HZ)) % 100, loops_per_jiffy);
214}
215
216
217void __init time_init(void)
218{
219 of_clk_init(NULL);
220 timer_probe();
221}