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1/*
2 * arch/sh/kernel/setup.c
3 *
4 * This file handles the architecture-dependent parts of initialization
5 *
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2010 Paul Mundt
8 */
9#include <linux/screen_info.h>
10#include <linux/ioport.h>
11#include <linux/init.h>
12#include <linux/initrd.h>
13#include <linux/bootmem.h>
14#include <linux/console.h>
15#include <linux/root_dev.h>
16#include <linux/utsname.h>
17#include <linux/nodemask.h>
18#include <linux/cpu.h>
19#include <linux/pfn.h>
20#include <linux/fs.h>
21#include <linux/mm.h>
22#include <linux/kexec.h>
23#include <linux/module.h>
24#include <linux/smp.h>
25#include <linux/err.h>
26#include <linux/crash_dump.h>
27#include <linux/mmzone.h>
28#include <linux/clk.h>
29#include <linux/delay.h>
30#include <linux/platform_device.h>
31#include <linux/memblock.h>
32#include <asm/uaccess.h>
33#include <asm/io.h>
34#include <asm/page.h>
35#include <asm/elf.h>
36#include <asm/sections.h>
37#include <asm/irq.h>
38#include <asm/setup.h>
39#include <asm/clock.h>
40#include <asm/smp.h>
41#include <asm/mmu_context.h>
42#include <asm/mmzone.h>
43#include <asm/sparsemem.h>
44
45/*
46 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
47 * This value will be used at the very early stage of serial setup.
48 * The bigger value means no problem.
49 */
50struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
51 [0] = {
52 .type = CPU_SH_NONE,
53 .family = CPU_FAMILY_UNKNOWN,
54 .loops_per_jiffy = 10000000,
55 .phys_bits = MAX_PHYSMEM_BITS,
56 },
57};
58EXPORT_SYMBOL(cpu_data);
59
60/*
61 * The machine vector. First entry in .machvec.init, or clobbered by
62 * sh_mv= on the command line, prior to .machvec.init teardown.
63 */
64struct sh_machine_vector sh_mv = { .mv_name = "generic", };
65EXPORT_SYMBOL(sh_mv);
66
67#ifdef CONFIG_VT
68struct screen_info screen_info;
69#endif
70
71extern int root_mountflags;
72
73#define RAMDISK_IMAGE_START_MASK 0x07FF
74#define RAMDISK_PROMPT_FLAG 0x8000
75#define RAMDISK_LOAD_FLAG 0x4000
76
77static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
78
79static struct resource code_resource = {
80 .name = "Kernel code",
81 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
82};
83
84static struct resource data_resource = {
85 .name = "Kernel data",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
87};
88
89static struct resource bss_resource = {
90 .name = "Kernel bss",
91 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
92};
93
94unsigned long memory_start;
95EXPORT_SYMBOL(memory_start);
96unsigned long memory_end = 0;
97EXPORT_SYMBOL(memory_end);
98unsigned long memory_limit = 0;
99
100static struct resource mem_resources[MAX_NUMNODES];
101
102int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
103
104static int __init early_parse_mem(char *p)
105{
106 if (!p)
107 return 1;
108
109 memory_limit = PAGE_ALIGN(memparse(p, &p));
110
111 pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
112
113 return 0;
114}
115early_param("mem", early_parse_mem);
116
117void __init check_for_initrd(void)
118{
119#ifdef CONFIG_BLK_DEV_INITRD
120 unsigned long start, end;
121
122 /*
123 * Check for the rare cases where boot loaders adhere to the boot
124 * ABI.
125 */
126 if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
127 goto disable;
128
129 start = INITRD_START + __MEMORY_START;
130 end = start + INITRD_SIZE;
131
132 if (unlikely(end <= start))
133 goto disable;
134 if (unlikely(start & ~PAGE_MASK)) {
135 pr_err("initrd must be page aligned\n");
136 goto disable;
137 }
138
139 if (unlikely(start < __MEMORY_START)) {
140 pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
141 start, __MEMORY_START);
142 goto disable;
143 }
144
145 if (unlikely(end > memblock_end_of_DRAM())) {
146 pr_err("initrd extends beyond end of memory "
147 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
148 end, (unsigned long)memblock_end_of_DRAM());
149 goto disable;
150 }
151
152 /*
153 * If we got this far in spite of the boot loader's best efforts
154 * to the contrary, assume we actually have a valid initrd and
155 * fix up the root dev.
156 */
157 ROOT_DEV = Root_RAM0;
158
159 /*
160 * Address sanitization
161 */
162 initrd_start = (unsigned long)__va(start);
163 initrd_end = initrd_start + INITRD_SIZE;
164
165 memblock_reserve(__pa(initrd_start), INITRD_SIZE);
166
167 return;
168
169disable:
170 pr_info("initrd disabled\n");
171 initrd_start = initrd_end = 0;
172#endif
173}
174
175void calibrate_delay(void)
176{
177 struct clk *clk = clk_get(NULL, "cpu_clk");
178
179 if (IS_ERR(clk))
180 panic("Need a sane CPU clock definition!");
181
182 loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
183
184 printk(KERN_INFO "Calibrating delay loop (skipped)... "
185 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
186 loops_per_jiffy/(500000/HZ),
187 (loops_per_jiffy/(5000/HZ)) % 100,
188 loops_per_jiffy);
189}
190
191void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
192 unsigned long end_pfn)
193{
194 struct resource *res = &mem_resources[nid];
195 unsigned long start, end;
196
197 WARN_ON(res->name); /* max one active range per node for now */
198
199 start = start_pfn << PAGE_SHIFT;
200 end = end_pfn << PAGE_SHIFT;
201
202 res->name = "System RAM";
203 res->start = start;
204 res->end = end - 1;
205 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
206
207 if (request_resource(&iomem_resource, res)) {
208 pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
209 start_pfn, end_pfn);
210 return;
211 }
212
213 /*
214 * We don't know which RAM region contains kernel data or
215 * the reserved crashkernel region, so try it repeatedly
216 * and let the resource manager test it.
217 */
218 request_resource(res, &code_resource);
219 request_resource(res, &data_resource);
220 request_resource(res, &bss_resource);
221#ifdef CONFIG_KEXEC
222 request_resource(res, &crashk_res);
223#endif
224
225 /*
226 * Also make sure that there is a PMB mapping that covers this
227 * range before we attempt to activate it, to avoid reset by MMU.
228 * We can hit this path with NUMA or memory hot-add.
229 */
230 pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
231 PAGE_KERNEL);
232
233 memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn),
234 &memblock.memory, nid);
235}
236
237void __init __weak plat_early_device_setup(void)
238{
239}
240
241void __init setup_arch(char **cmdline_p)
242{
243 enable_mmu();
244
245 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
246
247 printk(KERN_NOTICE "Boot params:\n"
248 "... MOUNT_ROOT_RDONLY - %08lx\n"
249 "... RAMDISK_FLAGS - %08lx\n"
250 "... ORIG_ROOT_DEV - %08lx\n"
251 "... LOADER_TYPE - %08lx\n"
252 "... INITRD_START - %08lx\n"
253 "... INITRD_SIZE - %08lx\n",
254 MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
255 ORIG_ROOT_DEV, LOADER_TYPE,
256 INITRD_START, INITRD_SIZE);
257
258#ifdef CONFIG_BLK_DEV_RAM
259 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
260 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
261 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
262#endif
263
264 if (!MOUNT_ROOT_RDONLY)
265 root_mountflags &= ~MS_RDONLY;
266 init_mm.start_code = (unsigned long) _text;
267 init_mm.end_code = (unsigned long) _etext;
268 init_mm.end_data = (unsigned long) _edata;
269 init_mm.brk = (unsigned long) _end;
270
271 code_resource.start = virt_to_phys(_text);
272 code_resource.end = virt_to_phys(_etext)-1;
273 data_resource.start = virt_to_phys(_etext);
274 data_resource.end = virt_to_phys(_edata)-1;
275 bss_resource.start = virt_to_phys(__bss_start);
276 bss_resource.end = virt_to_phys(__bss_stop)-1;
277
278#ifdef CONFIG_CMDLINE_OVERWRITE
279 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
280#else
281 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
282#ifdef CONFIG_CMDLINE_EXTEND
283 strlcat(command_line, " ", sizeof(command_line));
284 strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
285#endif
286#endif
287
288 /* Save unparsed command line copy for /proc/cmdline */
289 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
290 *cmdline_p = command_line;
291
292 parse_early_param();
293
294 plat_early_device_setup();
295
296 sh_mv_setup();
297
298 /* Let earlyprintk output early console messages */
299 early_platform_driver_probe("earlyprintk", 1, 1);
300
301 paging_init();
302
303#ifdef CONFIG_DUMMY_CONSOLE
304 conswitchp = &dummy_con;
305#endif
306
307 /* Perform the machine specific initialisation */
308 if (likely(sh_mv.mv_setup))
309 sh_mv.mv_setup(cmdline_p);
310
311 plat_smp_setup();
312}
313
314/* processor boot mode configuration */
315int generic_mode_pins(void)
316{
317 pr_warning("generic_mode_pins(): missing mode pin configuration\n");
318 return 0;
319}
320
321int test_mode_pin(int pin)
322{
323 return sh_mv.mv_mode_pins() & pin;
324}
1/*
2 * arch/sh/kernel/setup.c
3 *
4 * This file handles the architecture-dependent parts of initialization
5 *
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2010 Paul Mundt
8 */
9#include <linux/screen_info.h>
10#include <linux/ioport.h>
11#include <linux/init.h>
12#include <linux/initrd.h>
13#include <linux/bootmem.h>
14#include <linux/console.h>
15#include <linux/root_dev.h>
16#include <linux/utsname.h>
17#include <linux/nodemask.h>
18#include <linux/cpu.h>
19#include <linux/pfn.h>
20#include <linux/fs.h>
21#include <linux/mm.h>
22#include <linux/kexec.h>
23#include <linux/module.h>
24#include <linux/smp.h>
25#include <linux/err.h>
26#include <linux/crash_dump.h>
27#include <linux/mmzone.h>
28#include <linux/clk.h>
29#include <linux/delay.h>
30#include <linux/platform_device.h>
31#include <linux/memblock.h>
32#include <linux/of.h>
33#include <linux/of_fdt.h>
34#include <asm/uaccess.h>
35#include <asm/io.h>
36#include <asm/page.h>
37#include <asm/elf.h>
38#include <asm/sections.h>
39#include <asm/irq.h>
40#include <asm/setup.h>
41#include <asm/clock.h>
42#include <asm/smp.h>
43#include <asm/mmu_context.h>
44#include <asm/mmzone.h>
45#include <asm/sparsemem.h>
46
47/*
48 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
49 * This value will be used at the very early stage of serial setup.
50 * The bigger value means no problem.
51 */
52struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
53 [0] = {
54 .type = CPU_SH_NONE,
55 .family = CPU_FAMILY_UNKNOWN,
56 .loops_per_jiffy = 10000000,
57 .phys_bits = MAX_PHYSMEM_BITS,
58 },
59};
60EXPORT_SYMBOL(cpu_data);
61
62/*
63 * The machine vector. First entry in .machvec.init, or clobbered by
64 * sh_mv= on the command line, prior to .machvec.init teardown.
65 */
66struct sh_machine_vector sh_mv = { .mv_name = "generic", };
67EXPORT_SYMBOL(sh_mv);
68
69#ifdef CONFIG_VT
70struct screen_info screen_info;
71#endif
72
73extern int root_mountflags;
74
75#define RAMDISK_IMAGE_START_MASK 0x07FF
76#define RAMDISK_PROMPT_FLAG 0x8000
77#define RAMDISK_LOAD_FLAG 0x4000
78
79static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
80
81static struct resource code_resource = {
82 .name = "Kernel code",
83 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
84};
85
86static struct resource data_resource = {
87 .name = "Kernel data",
88 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
89};
90
91static struct resource bss_resource = {
92 .name = "Kernel bss",
93 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
94};
95
96unsigned long memory_start;
97EXPORT_SYMBOL(memory_start);
98unsigned long memory_end = 0;
99EXPORT_SYMBOL(memory_end);
100unsigned long memory_limit = 0;
101
102static struct resource mem_resources[MAX_NUMNODES];
103
104int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
105
106static int __init early_parse_mem(char *p)
107{
108 if (!p)
109 return 1;
110
111 memory_limit = PAGE_ALIGN(memparse(p, &p));
112
113 pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
114
115 return 0;
116}
117early_param("mem", early_parse_mem);
118
119void __init check_for_initrd(void)
120{
121#ifdef CONFIG_BLK_DEV_INITRD
122 unsigned long start, end;
123
124 /*
125 * Check for the rare cases where boot loaders adhere to the boot
126 * ABI.
127 */
128 if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
129 goto disable;
130
131 start = INITRD_START + __MEMORY_START;
132 end = start + INITRD_SIZE;
133
134 if (unlikely(end <= start))
135 goto disable;
136 if (unlikely(start & ~PAGE_MASK)) {
137 pr_err("initrd must be page aligned\n");
138 goto disable;
139 }
140
141 if (unlikely(start < __MEMORY_START)) {
142 pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
143 start, __MEMORY_START);
144 goto disable;
145 }
146
147 if (unlikely(end > memblock_end_of_DRAM())) {
148 pr_err("initrd extends beyond end of memory "
149 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
150 end, (unsigned long)memblock_end_of_DRAM());
151 goto disable;
152 }
153
154 /*
155 * If we got this far in spite of the boot loader's best efforts
156 * to the contrary, assume we actually have a valid initrd and
157 * fix up the root dev.
158 */
159 ROOT_DEV = Root_RAM0;
160
161 /*
162 * Address sanitization
163 */
164 initrd_start = (unsigned long)__va(start);
165 initrd_end = initrd_start + INITRD_SIZE;
166
167 memblock_reserve(__pa(initrd_start), INITRD_SIZE);
168
169 return;
170
171disable:
172 pr_info("initrd disabled\n");
173 initrd_start = initrd_end = 0;
174#endif
175}
176
177#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
178void calibrate_delay(void)
179{
180 struct clk *clk = clk_get(NULL, "cpu_clk");
181
182 if (IS_ERR(clk))
183 panic("Need a sane CPU clock definition!");
184
185 loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
186
187 printk(KERN_INFO "Calibrating delay loop (skipped)... "
188 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
189 loops_per_jiffy/(500000/HZ),
190 (loops_per_jiffy/(5000/HZ)) % 100,
191 loops_per_jiffy);
192}
193#endif
194
195void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
196 unsigned long end_pfn)
197{
198 struct resource *res = &mem_resources[nid];
199 unsigned long start, end;
200
201 WARN_ON(res->name); /* max one active range per node for now */
202
203 start = start_pfn << PAGE_SHIFT;
204 end = end_pfn << PAGE_SHIFT;
205
206 res->name = "System RAM";
207 res->start = start;
208 res->end = end - 1;
209 res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
210
211 if (request_resource(&iomem_resource, res)) {
212 pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
213 start_pfn, end_pfn);
214 return;
215 }
216
217 /*
218 * We don't know which RAM region contains kernel data or
219 * the reserved crashkernel region, so try it repeatedly
220 * and let the resource manager test it.
221 */
222 request_resource(res, &code_resource);
223 request_resource(res, &data_resource);
224 request_resource(res, &bss_resource);
225#ifdef CONFIG_KEXEC
226 request_resource(res, &crashk_res);
227#endif
228
229 /*
230 * Also make sure that there is a PMB mapping that covers this
231 * range before we attempt to activate it, to avoid reset by MMU.
232 * We can hit this path with NUMA or memory hot-add.
233 */
234 pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
235 PAGE_KERNEL);
236
237 memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn),
238 &memblock.memory, nid);
239}
240
241void __init __weak plat_early_device_setup(void)
242{
243}
244
245#ifdef CONFIG_OF
246void __ref sh_fdt_init(phys_addr_t dt_phys)
247{
248 static int done = 0;
249 void *dt_virt;
250
251 /* Avoid calling an __init function on secondary cpus. */
252 if (done) return;
253
254 dt_virt = phys_to_virt(dt_phys);
255
256 if (!dt_virt || !early_init_dt_scan(dt_virt)) {
257 pr_crit("Error: invalid device tree blob"
258 " at physical address %p\n", (void *)dt_phys);
259
260 while (true)
261 cpu_relax();
262 }
263
264 done = 1;
265}
266#endif
267
268void __init setup_arch(char **cmdline_p)
269{
270 enable_mmu();
271
272 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
273
274 printk(KERN_NOTICE "Boot params:\n"
275 "... MOUNT_ROOT_RDONLY - %08lx\n"
276 "... RAMDISK_FLAGS - %08lx\n"
277 "... ORIG_ROOT_DEV - %08lx\n"
278 "... LOADER_TYPE - %08lx\n"
279 "... INITRD_START - %08lx\n"
280 "... INITRD_SIZE - %08lx\n",
281 MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
282 ORIG_ROOT_DEV, LOADER_TYPE,
283 INITRD_START, INITRD_SIZE);
284
285#ifdef CONFIG_BLK_DEV_RAM
286 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
287 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
288 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
289#endif
290
291 if (!MOUNT_ROOT_RDONLY)
292 root_mountflags &= ~MS_RDONLY;
293 init_mm.start_code = (unsigned long) _text;
294 init_mm.end_code = (unsigned long) _etext;
295 init_mm.end_data = (unsigned long) _edata;
296 init_mm.brk = (unsigned long) _end;
297
298 code_resource.start = virt_to_phys(_text);
299 code_resource.end = virt_to_phys(_etext)-1;
300 data_resource.start = virt_to_phys(_etext);
301 data_resource.end = virt_to_phys(_edata)-1;
302 bss_resource.start = virt_to_phys(__bss_start);
303 bss_resource.end = virt_to_phys(__bss_stop)-1;
304
305#ifdef CONFIG_CMDLINE_OVERWRITE
306 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
307#else
308 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
309#ifdef CONFIG_CMDLINE_EXTEND
310 strlcat(command_line, " ", sizeof(command_line));
311 strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
312#endif
313#endif
314
315 /* Save unparsed command line copy for /proc/cmdline */
316 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
317 *cmdline_p = command_line;
318
319 parse_early_param();
320
321 plat_early_device_setup();
322
323 sh_mv_setup();
324
325 /* Let earlyprintk output early console messages */
326 early_platform_driver_probe("earlyprintk", 1, 1);
327
328 paging_init();
329
330#ifdef CONFIG_DUMMY_CONSOLE
331 conswitchp = &dummy_con;
332#endif
333
334 /* Perform the machine specific initialisation */
335 if (likely(sh_mv.mv_setup))
336 sh_mv.mv_setup(cmdline_p);
337
338 plat_smp_setup();
339}
340
341/* processor boot mode configuration */
342int generic_mode_pins(void)
343{
344 pr_warning("generic_mode_pins(): missing mode pin configuration\n");
345 return 0;
346}
347
348int test_mode_pin(int pin)
349{
350 return sh_mv.mv_mode_pins() & pin;
351}