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-rw-r--r--arch/m32r/kernel/setup.c420
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diff --git a/arch/m32r/kernel/setup.c b/arch/m32r/kernel/setup.c
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1/*
2 * linux/arch/m32r/kernel/setup.c
3 *
4 * Setup routines for Renesas M32R
5 *
6 * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata,
7 * Hitoshi Yamamoto
8 */
9
10#include <linux/config.h>
11#include <linux/init.h>
12#include <linux/stddef.h>
13#include <linux/fs.h>
14#include <linux/sched.h>
15#include <linux/ioport.h>
16#include <linux/mm.h>
17#include <linux/bootmem.h>
18#include <linux/console.h>
19#include <linux/initrd.h>
20#include <linux/major.h>
21#include <linux/root_dev.h>
22#include <linux/seq_file.h>
23#include <linux/timex.h>
24#include <linux/tty.h>
25#include <linux/cpu.h>
26#include <linux/nodemask.h>
27
28#include <asm/processor.h>
29#include <asm/pgtable.h>
30#include <asm/io.h>
31#include <asm/mmu_context.h>
32#include <asm/m32r.h>
33#include <asm/setup.h>
34#include <asm/sections.h>
35
36#ifdef CONFIG_MMU
37extern void init_mmu(void);
38#endif
39
40#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) \
41 || defined(CONFIG_BLK_DEV_IDE_MODULE) \
42 || defined(CONFIG_BLK_DEV_HD_MODULE)
43struct drive_info_struct { char dummy[32]; } drive_info;
44#endif
45
46extern char _end[];
47
48/*
49 * Machine setup..
50 */
51struct cpuinfo_m32r boot_cpu_data;
52
53#ifdef CONFIG_BLK_DEV_RAM
54extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */
55extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */
56extern int rd_image_start; /* starting block # of image */
57#endif
58
59#if defined(CONFIG_VGA_CONSOLE)
60struct screen_info screen_info = {
61 .orig_video_lines = 25,
62 .orig_video_cols = 80,
63 .orig_video_mode = 0,
64 .orig_video_ega_bx = 0,
65 .orig_video_isVGA = 1,
66 .orig_video_points = 8
67};
68#endif
69
70extern int root_mountflags;
71
72static char command_line[COMMAND_LINE_SIZE];
73
74static struct resource data_resource = {
75 .name = "Kernel data",
76 .start = 0,
77 .end = 0,
78 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
79};
80
81static struct resource code_resource = {
82 .name = "Kernel code",
83 .start = 0,
84 .end = 0,
85 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
86};
87
88unsigned long memory_start;
89unsigned long memory_end;
90
91void __init setup_arch(char **);
92int get_cpuinfo(char *);
93
94static __inline__ void parse_mem_cmdline(char ** cmdline_p)
95{
96 char c = ' ';
97 char *to = command_line;
98 char *from = COMMAND_LINE;
99 int len = 0;
100 int usermem = 0;
101
102 /* Save unparsed command line copy for /proc/cmdline */
103 memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
104 saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
105
106 memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET;
107 memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE;
108
109 for ( ; ; ) {
110 if (c == ' ' && !memcmp(from, "mem=", 4)) {
111 if (to != command_line)
112 to--;
113
114 {
115 unsigned long mem_size;
116
117 usermem = 1;
118 mem_size = memparse(from+4, &from);
119 memory_end = memory_start + mem_size;
120 }
121 }
122 c = *(from++);
123 if (!c)
124 break;
125
126 if (COMMAND_LINE_SIZE <= ++len)
127 break;
128
129 *(to++) = c;
130 }
131 *to = '\0';
132 *cmdline_p = command_line;
133 if (usermem)
134 printk(KERN_INFO "user-defined physical RAM map:\n");
135}
136
137#ifndef CONFIG_DISCONTIGMEM
138static unsigned long __init setup_memory(void)
139{
140 unsigned long start_pfn, max_low_pfn, bootmap_size;
141
142 start_pfn = PFN_UP( __pa(_end) );
143 max_low_pfn = PFN_DOWN( __pa(memory_end) );
144
145 /*
146 * Initialize the boot-time allocator (with low memory only):
147 */
148 bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
149 CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn);
150
151 /*
152 * Register fully available low RAM pages with the bootmem allocator.
153 */
154 {
155 unsigned long curr_pfn;
156 unsigned long last_pfn;
157 unsigned long pages;
158
159 /*
160 * We are rounding up the start address of usable memory:
161 */
162 curr_pfn = PFN_UP(__pa(memory_start));
163
164 /*
165 * ... and at the end of the usable range downwards:
166 */
167 last_pfn = PFN_DOWN(__pa(memory_end));
168
169 if (last_pfn > max_low_pfn)
170 last_pfn = max_low_pfn;
171
172 pages = last_pfn - curr_pfn;
173 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
174 }
175
176 /*
177 * Reserve the kernel text and
178 * Reserve the bootmem bitmap. We do this in two steps (first step
179 * was init_bootmem()), because this catches the (definitely buggy)
180 * case of us accidentally initializing the bootmem allocator with
181 * an invalid RAM area.
182 */
183 reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
184 (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
185 - CONFIG_MEMORY_START);
186
187 /*
188 * reserve physical page 0 - it's a special BIOS page on many boxes,
189 * enabling clean reboots, SMP operation, laptop functions.
190 */
191 reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE);
192
193 /*
194 * reserve memory hole
195 */
196#ifdef CONFIG_MEMHOLE
197 reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE);
198#endif
199
200#ifdef CONFIG_BLK_DEV_INITRD
201 if (LOADER_TYPE && INITRD_START) {
202 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
203 reserve_bootmem(INITRD_START, INITRD_SIZE);
204 initrd_start = INITRD_START ?
205 INITRD_START + PAGE_OFFSET : 0;
206
207 initrd_end = initrd_start + INITRD_SIZE;
208 printk("initrd:start[%08lx],size[%08lx]\n",
209 initrd_start, INITRD_SIZE);
210 } else {
211 printk("initrd extends beyond end of memory "
212 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
213 INITRD_START + INITRD_SIZE,
214 max_low_pfn << PAGE_SHIFT);
215
216 initrd_start = 0;
217 }
218 }
219#endif
220
221 return max_low_pfn;
222}
223#else /* CONFIG_DISCONTIGMEM */
224extern unsigned long setup_memory(void);
225#endif /* CONFIG_DISCONTIGMEM */
226
227#define M32R_PCC_PCATCR 0x00ef7014 /* will move to m32r.h */
228
229void __init setup_arch(char **cmdline_p)
230{
231 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
232
233 boot_cpu_data.cpu_clock = M32R_CPUCLK;
234 boot_cpu_data.bus_clock = M32R_BUSCLK;
235 boot_cpu_data.timer_divide = M32R_TIMER_DIVIDE;
236
237#ifdef CONFIG_BLK_DEV_RAM
238 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
239 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
240 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
241#endif
242
243 if (!MOUNT_ROOT_RDONLY)
244 root_mountflags &= ~MS_RDONLY;
245
246#ifdef CONFIG_VT
247#if defined(CONFIG_VGA_CONSOLE)
248 conswitchp = &vga_con;
249#elif defined(CONFIG_DUMMY_CONSOLE)
250 conswitchp = &dummy_con;
251#endif
252#endif
253
254#ifdef CONFIG_DISCONTIGMEM
255 nodes_clear(node_online_map);
256 node_set_online(0);
257 node_set_online(1);
258#endif /* CONFIG_DISCONTIGMEM */
259
260 init_mm.start_code = (unsigned long) _text;
261 init_mm.end_code = (unsigned long) _etext;
262 init_mm.end_data = (unsigned long) _edata;
263 init_mm.brk = (unsigned long) _end;
264
265 code_resource.start = virt_to_phys(_text);
266 code_resource.end = virt_to_phys(_etext)-1;
267 data_resource.start = virt_to_phys(_etext);
268 data_resource.end = virt_to_phys(_edata)-1;
269
270 parse_mem_cmdline(cmdline_p);
271
272 setup_memory();
273
274 paging_init();
275}
276
277static struct cpu cpu[NR_CPUS];
278
279static int __init topology_init(void)
280{
281 int cpu_id;
282
283 for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
284 if (cpu_possible(cpu_id))
285 register_cpu(&cpu[cpu_id], cpu_id, NULL);
286
287 return 0;
288}
289
290subsys_initcall(topology_init);
291
292#ifdef CONFIG_PROC_FS
293/*
294 * Get CPU information for use by the procfs.
295 */
296static int show_cpuinfo(struct seq_file *m, void *v)
297{
298 struct cpuinfo_m32r *c = v;
299 unsigned long cpu = c - cpu_data;
300
301#ifdef CONFIG_SMP
302 if (!cpu_online(cpu))
303 return 0;
304#endif /* CONFIG_SMP */
305
306 seq_printf(m, "processor\t: %ld\n", cpu);
307
308#ifdef CONFIG_CHIP_VDEC2
309 seq_printf(m, "cpu family\t: VDEC2\n"
310 "cache size\t: Unknown\n");
311#elif CONFIG_CHIP_M32700
312 seq_printf(m,"cpu family\t: M32700\n"
313 "cache size\t: I-8KB/D-8KB\n");
314#elif CONFIG_CHIP_M32102
315 seq_printf(m,"cpu family\t: M32102\n"
316 "cache size\t: I-8KB\n");
317#elif CONFIG_CHIP_OPSP
318 seq_printf(m,"cpu family\t: OPSP\n"
319 "cache size\t: I-8KB/D-8KB\n");
320#elif CONFIG_CHIP_MP
321 seq_printf(m, "cpu family\t: M32R-MP\n"
322 "cache size\t: I-xxKB/D-xxKB\n");
323#else
324 seq_printf(m, "cpu family\t: Unknown\n");
325#endif
326 seq_printf(m, "bogomips\t: %lu.%02lu\n",
327 c->loops_per_jiffy/(500000/HZ),
328 (c->loops_per_jiffy/(5000/HZ)) % 100);
329#ifdef CONFIG_PLAT_MAPPI
330 seq_printf(m, "Machine\t\t: Mappi Evaluation board\n");
331#elif CONFIG_PLAT_MAPPI2
332 seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n");
333#elif CONFIG_PLAT_M32700UT
334 seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n");
335#elif CONFIG_PLAT_OPSPUT
336 seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n");
337#elif CONFIG_PLAT_USRV
338 seq_printf(m, "Machine\t\t: uServer\n");
339#elif CONFIG_PLAT_OAKS32R
340 seq_printf(m, "Machine\t\t: OAKS32R\n");
341#else
342 seq_printf(m, "Machine\t\t: Unknown\n");
343#endif
344
345#define PRINT_CLOCK(name, value) \
346 seq_printf(m, name " clock\t: %d.%02dMHz\n", \
347 ((value) / 1000000), ((value) % 1000000)/10000)
348
349 PRINT_CLOCK("CPU", (int)c->cpu_clock);
350 PRINT_CLOCK("Bus", (int)c->bus_clock);
351
352 seq_printf(m, "\n");
353
354 return 0;
355}
356
357static void *c_start(struct seq_file *m, loff_t *pos)
358{
359 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
360}
361
362static void *c_next(struct seq_file *m, void *v, loff_t *pos)
363{
364 ++*pos;
365 return c_start(m, pos);
366}
367
368static void c_stop(struct seq_file *m, void *v)
369{
370}
371
372struct seq_operations cpuinfo_op = {
373 start: c_start,
374 next: c_next,
375 stop: c_stop,
376 show: show_cpuinfo,
377};
378#endif /* CONFIG_PROC_FS */
379
380unsigned long cpu_initialized __initdata = 0;
381
382/*
383 * cpu_init() initializes state that is per-CPU. Some data is already
384 * initialized (naturally) in the bootstrap process.
385 * We reload them nevertheless, this function acts as a
386 * 'CPU state barrier', nothing should get across.
387 */
388#if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2) \
389 || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
390 || defined(CONFIG_CHIP_OPSP)
391void __init cpu_init (void)
392{
393 int cpu_id = smp_processor_id();
394
395 if (test_and_set_bit(cpu_id, &cpu_initialized)) {
396 printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id);
397 for ( ; ; )
398 local_irq_enable();
399 }
400 printk(KERN_INFO "Initializing CPU#%d\n", cpu_id);
401
402 /* Set up and load the per-CPU TSS and LDT */
403 atomic_inc(&init_mm.mm_count);
404 current->active_mm = &init_mm;
405 if (current->mm)
406 BUG();
407
408 /* Force FPU initialization */
409 current_thread_info()->status = 0;
410 clear_used_math();
411
412#ifdef CONFIG_MMU
413 /* Set up MMU */
414 init_mmu();
415#endif
416
417 /* Set up ICUIMASK */
418 outl(0x00070000, M32R_ICU_IMASK_PORTL); /* imask=111 */
419}
420#endif /* defined(CONFIG_CHIP_VDEC2) ... */
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