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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/bootmem.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_platform.h>
27#include <linux/of_address.h>
28#include <linux/clk-provider.h>
29#include <linux/memblock.h>
30#include <linux/screen_info.h>
31#include <linux/clocksource.h>
32
33#include <asm/setup.h>
34#include <asm/irq.h>
35#include <asm/pgtable.h>
36#include <asm/sections.h>
37#include <asm/page.h>
38
39#if defined(CONFIG_CPU_H8300H)
40#define CPU "H8/300H"
41#elif defined(CONFIG_CPU_H8S)
42#define CPU "H8S"
43#else
44#define CPU "Unknown"
45#endif
46
47unsigned long memory_start;
48unsigned long memory_end;
49EXPORT_SYMBOL(memory_end);
50static unsigned long freq;
51extern char __dtb_start[];
52
53#ifdef CONFIG_VT
54struct screen_info screen_info;
55#endif
56
57char __initdata command_line[COMMAND_LINE_SIZE];
58
59void sim_console_register(void);
60
61void __init h8300_fdt_init(void *fdt, char *bootargs)
62{
63 if (!fdt)
64 fdt = __dtb_start;
65 else
66 strcpy(command_line, bootargs);
67
68 early_init_dt_scan(fdt);
69 memblock_allow_resize();
70}
71
72static void __init bootmem_init(void)
73{
74 int bootmap_size;
75 unsigned long ram_start_pfn;
76 unsigned long free_ram_start_pfn;
77 unsigned long ram_end_pfn;
78 struct memblock_region *region;
79
80 memory_end = memory_start = 0;
81
82
83 for_each_memblock(memory, region) {
84 memory_start = region->base;
85 memory_end = region->base + region->size;
86 }
87
88 if (!memory_end)
89 panic("No memory!");
90
91 ram_start_pfn = PFN_UP(memory_start);
92
93 free_ram_start_pfn = PFN_UP(__pa(_end));
94 ram_end_pfn = PFN_DOWN(memblock_end_of_DRAM());
95
96 max_pfn = ram_end_pfn;
97
98
99
100
101
102 bootmap_size = init_bootmem_node(NODE_DATA(0),
103 free_ram_start_pfn,
104 0,
105 ram_end_pfn);
106
107
108
109
110 free_bootmem(PFN_PHYS(free_ram_start_pfn),
111 (ram_end_pfn - free_ram_start_pfn) << PAGE_SHIFT);
112 reserve_bootmem(PFN_PHYS(free_ram_start_pfn), bootmap_size,
113 BOOTMEM_DEFAULT);
114
115 for_each_memblock(reserved, region) {
116 reserve_bootmem(region->base, region->size, BOOTMEM_DEFAULT);
117 }
118}
119
120void __init setup_arch(char **cmdline_p)
121{
122 unflatten_and_copy_device_tree();
123
124 init_mm.start_code = (unsigned long) _stext;
125 init_mm.end_code = (unsigned long) _etext;
126 init_mm.end_data = (unsigned long) _edata;
127 init_mm.brk = (unsigned long) 0;
128
129 pr_notice("\r\n\nuClinux " CPU "\n");
130 pr_notice("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
131
132 if (*command_line)
133 strcpy(boot_command_line, command_line);
134 *cmdline_p = boot_command_line;
135
136 parse_early_param();
137
138 bootmem_init();
139
140
141
142 paging_init();
143}
144
145
146
147
148
149static int show_cpuinfo(struct seq_file *m, void *v)
150{
151 char *cpu;
152
153 cpu = CPU;
154
155 seq_printf(m, "CPU:\t\t%s\n"
156 "Clock:\t\t%lu.%1luMHz\n"
157 "BogoMips:\t%lu.%02lu\n"
158 "Calibration:\t%lu loops\n",
159 cpu,
160 freq/1000, freq%1000,
161 (loops_per_jiffy*HZ)/500000,
162 ((loops_per_jiffy*HZ)/5000)%100,
163 (loops_per_jiffy*HZ));
164
165 return 0;
166}
167
168static void *c_start(struct seq_file *m, loff_t *pos)
169{
170 return *pos < num_possible_cpus() ?
171 ((void *) 0x12345678) : NULL;
172}
173
174static void *c_next(struct seq_file *m, void *v, loff_t *pos)
175{
176 ++*pos;
177 return c_start(m, pos);
178}
179
180static void c_stop(struct seq_file *m, void *v)
181{
182}
183
184const struct seq_operations cpuinfo_op = {
185 .start = c_start,
186 .next = c_next,
187 .stop = c_stop,
188 .show = show_cpuinfo,
189};
190
191static int __init device_probe(void)
192{
193 of_platform_populate(NULL, NULL, NULL, NULL);
194
195 return 0;
196}
197
198device_initcall(device_probe);
199
200#if defined(CONFIG_CPU_H8300H)
201#define get_wait(base, addr) ({ \
202 int baddr; \
203 baddr = ((addr) / 0x200000 * 2); \
204 w *= (readw((base) + 2) & (3 << baddr)) + 1; \
205 })
206#endif
207#if defined(CONFIG_CPU_H8S)
208#define get_wait(base, addr) ({ \
209 int baddr; \
210 baddr = ((addr) / 0x200000 * 16); \
211 w *= (readl((base) + 2) & (7 << baddr)) + 1; \
212 })
213#endif
214
215static __init int access_timing(void)
216{
217 struct device_node *bsc;
218 void __iomem *base;
219 unsigned long addr = (unsigned long)&__delay;
220 int bit = 1 << (addr / 0x200000);
221 int w;
222
223 bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
224 base = of_iomap(bsc, 0);
225 w = (readb(base + 0) & bit)?2:1;
226 if (readb(base + 1) & bit)
227 w *= get_wait(base, addr);
228 else
229 w *= 2;
230 return w * 3 / 2;
231}
232
233void __init calibrate_delay(void)
234{
235 struct device_node *cpu;
236 int freq;
237
238 cpu = of_find_compatible_node(NULL, NULL, "renesas,h8300");
239 of_property_read_s32(cpu, "clock-frequency", &freq);
240 loops_per_jiffy = freq / HZ / (access_timing() * 2);
241 pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n",
242 loops_per_jiffy / (500000 / HZ),
243 (loops_per_jiffy / (5000 / HZ)) % 100, loops_per_jiffy);
244}
245
246
247void __init time_init(void)
248{
249 of_clk_init(NULL);
250 timer_probe();
251}
252
