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12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/delay.h>
15#include <linux/interrupt.h>
16#include <linux/mm.h>
17#include <linux/fs.h>
18#include <linux/console.h>
19#include <linux/errno.h>
20#include <linux/string.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
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
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
99
100
101 bootmap_size = init_bootmem_node(NODE_DATA(0),
102 free_ram_start_pfn,
103 0,
104 ram_end_pfn);
105
106
107
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
140
141 paging_init();
142}
143
144
145
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 timer_probe();
250}
251
