Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * arch/sh64/kernel/setup.c |
| 7 | * |
| 8 | * sh64 Arch Support |
| 9 | * |
| 10 | * This file handles the architecture-dependent parts of initialization |
| 11 | * |
| 12 | * Copyright (C) 2000, 2001 Paolo Alberelli |
| 13 | * Copyright (C) 2003, 2004 Paul Mundt |
| 14 | * |
| 15 | * benedict.gaster@superh.com: 2nd May 2002 |
| 16 | * Modified to use the empty_zero_page to pass command line arguments. |
| 17 | * |
| 18 | * benedict.gaster@superh.com: 3rd May 2002 |
| 19 | * Added support for ramdisk, removing statically linked romfs at the same time. |
| 20 | * |
| 21 | * lethal@linux-sh.org: 15th May 2003 |
| 22 | * Added generic procfs cpuinfo reporting. Make boards just export their name. |
| 23 | * |
| 24 | * lethal@linux-sh.org: 25th May 2003 |
| 25 | * Added generic get_cpu_subtype() for subtype reporting from cpu_data->type. |
| 26 | * |
| 27 | */ |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/rwsem.h> |
| 30 | #include <linux/sched.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/mm.h> |
| 33 | #include <linux/stddef.h> |
| 34 | #include <linux/unistd.h> |
| 35 | #include <linux/ptrace.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/user.h> |
| 38 | #include <linux/a.out.h> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 39 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/ioport.h> |
| 41 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/init.h> |
| 43 | #include <linux/seq_file.h> |
| 44 | #include <linux/blkdev.h> |
| 45 | #include <linux/bootmem.h> |
| 46 | #include <linux/console.h> |
| 47 | #include <linux/root_dev.h> |
| 48 | #include <linux/cpu.h> |
| 49 | #include <linux/initrd.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 50 | #include <linux/pfn.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <asm/processor.h> |
| 52 | #include <asm/page.h> |
| 53 | #include <asm/pgtable.h> |
| 54 | #include <asm/platform.h> |
| 55 | #include <asm/uaccess.h> |
| 56 | #include <asm/system.h> |
| 57 | #include <asm/io.h> |
| 58 | #include <asm/sections.h> |
| 59 | #include <asm/setup.h> |
| 60 | #include <asm/smp.h> |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | struct screen_info screen_info; |
| 63 | |
| 64 | #ifdef CONFIG_BLK_DEV_RAM |
| 65 | extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */ |
| 66 | extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */ |
| 67 | extern int rd_image_start; /* starting block # of image */ |
| 68 | #endif |
| 69 | |
| 70 | extern int root_mountflags; |
| 71 | extern char *get_system_type(void); |
| 72 | extern void platform_setup(void); |
| 73 | extern void platform_monitor(void); |
| 74 | extern void platform_reserve(void); |
| 75 | extern int sh64_cache_init(void); |
| 76 | extern int sh64_tlb_init(void); |
| 77 | |
| 78 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
| 79 | #define RAMDISK_PROMPT_FLAG 0x8000 |
| 80 | #define RAMDISK_LOAD_FLAG 0x4000 |
| 81 | |
Alon Bar-Lev | 3e42ff6 | 2007-02-12 00:54:20 -0800 | [diff] [blame] | 82 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | unsigned long long memory_start = CONFIG_MEMORY_START; |
| 84 | unsigned long long memory_end = CONFIG_MEMORY_START + (CONFIG_MEMORY_SIZE_IN_MB * 1024 * 1024); |
| 85 | |
| 86 | struct sh_cpuinfo boot_cpu_data; |
| 87 | |
| 88 | static inline void parse_mem_cmdline (char ** cmdline_p) |
| 89 | { |
| 90 | char c = ' ', *to = command_line, *from = COMMAND_LINE; |
| 91 | int len = 0; |
| 92 | |
| 93 | /* Save unparsed command line copy for /proc/cmdline */ |
Alon Bar-Lev | 3e42ff6 | 2007-02-12 00:54:20 -0800 | [diff] [blame] | 94 | memcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); |
| 95 | boot_command_line[COMMAND_LINE_SIZE-1] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | for (;;) { |
| 98 | /* |
| 99 | * "mem=XXX[kKmM]" defines a size of memory. |
| 100 | */ |
| 101 | if (c == ' ' && !memcmp(from, "mem=", 4)) { |
| 102 | if (to != command_line) |
| 103 | to--; |
| 104 | { |
| 105 | unsigned long mem_size; |
| 106 | |
| 107 | mem_size = memparse(from+4, &from); |
| 108 | memory_end = memory_start + mem_size; |
| 109 | } |
| 110 | } |
| 111 | c = *(from++); |
| 112 | if (!c) |
| 113 | break; |
| 114 | if (COMMAND_LINE_SIZE <= ++len) |
| 115 | break; |
| 116 | *(to++) = c; |
| 117 | } |
| 118 | *to = '\0'; |
| 119 | |
| 120 | *cmdline_p = command_line; |
| 121 | } |
| 122 | |
| 123 | static void __init sh64_cpu_type_detect(void) |
| 124 | { |
| 125 | extern unsigned long long peek_real_address_q(unsigned long long addr); |
| 126 | unsigned long long cir; |
| 127 | /* Do peeks in real mode to avoid having to set up a mapping for the |
| 128 | WPC registers. On SH5-101 cut2, such a mapping would be exposed to |
| 129 | an address translation erratum which would make it hard to set up |
| 130 | correctly. */ |
| 131 | cir = peek_real_address_q(0x0d000008); |
| 132 | |
| 133 | if ((cir & 0xffff) == 0x5103) { |
| 134 | boot_cpu_data.type = CPU_SH5_103; |
| 135 | } else if (((cir >> 32) & 0xffff) == 0x51e2) { |
| 136 | /* CPU.VCR aliased at CIR address on SH5-101 */ |
| 137 | boot_cpu_data.type = CPU_SH5_101; |
| 138 | } else { |
| 139 | boot_cpu_data.type = CPU_SH_NONE; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | void __init setup_arch(char **cmdline_p) |
| 144 | { |
| 145 | unsigned long bootmap_size, i; |
| 146 | unsigned long first_pfn, start_pfn, last_pfn, pages; |
| 147 | |
| 148 | #ifdef CONFIG_EARLY_PRINTK |
| 149 | extern void enable_early_printk(void); |
| 150 | |
| 151 | /* |
| 152 | * Setup Early SCIF console |
| 153 | */ |
| 154 | enable_early_printk(); |
| 155 | #endif |
| 156 | |
| 157 | /* |
| 158 | * Setup TLB mappings |
| 159 | */ |
| 160 | sh64_tlb_init(); |
| 161 | |
| 162 | /* |
| 163 | * Caches are already initialized by the time we get here, so we just |
| 164 | * fill in cpu_data info for the caches. |
| 165 | */ |
| 166 | sh64_cache_init(); |
| 167 | |
| 168 | platform_setup(); |
| 169 | platform_monitor(); |
| 170 | |
| 171 | sh64_cpu_type_detect(); |
| 172 | |
| 173 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
| 174 | |
| 175 | #ifdef CONFIG_BLK_DEV_RAM |
| 176 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; |
| 177 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); |
| 178 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); |
| 179 | #endif |
| 180 | |
| 181 | if (!MOUNT_ROOT_RDONLY) |
| 182 | root_mountflags &= ~MS_RDONLY; |
| 183 | init_mm.start_code = (unsigned long) _text; |
| 184 | init_mm.end_code = (unsigned long) _etext; |
| 185 | init_mm.end_data = (unsigned long) _edata; |
| 186 | init_mm.brk = (unsigned long) _end; |
| 187 | |
| 188 | code_resource.start = __pa(_text); |
| 189 | code_resource.end = __pa(_etext)-1; |
| 190 | data_resource.start = __pa(_etext); |
| 191 | data_resource.end = __pa(_edata)-1; |
| 192 | |
| 193 | parse_mem_cmdline(cmdline_p); |
| 194 | |
| 195 | /* |
| 196 | * Find the lowest and highest page frame numbers we have available |
| 197 | */ |
| 198 | first_pfn = PFN_DOWN(memory_start); |
| 199 | last_pfn = PFN_DOWN(memory_end); |
| 200 | pages = last_pfn - first_pfn; |
| 201 | |
| 202 | /* |
| 203 | * Partially used pages are not usable - thus |
| 204 | * we are rounding upwards: |
| 205 | */ |
| 206 | start_pfn = PFN_UP(__pa(_end)); |
| 207 | |
| 208 | /* |
| 209 | * Find a proper area for the bootmem bitmap. After this |
| 210 | * bootstrap step all allocations (until the page allocator |
| 211 | * is intact) must be done via bootmem_alloc(). |
| 212 | */ |
| 213 | bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, |
| 214 | first_pfn, |
| 215 | last_pfn); |
| 216 | /* |
| 217 | * Round it up. |
| 218 | */ |
| 219 | bootmap_size = PFN_PHYS(PFN_UP(bootmap_size)); |
| 220 | |
| 221 | /* |
| 222 | * Register fully available RAM pages with the bootmem allocator. |
| 223 | */ |
| 224 | free_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn), PFN_PHYS(pages)); |
| 225 | |
| 226 | /* |
| 227 | * Reserve all kernel sections + bootmem bitmap + a guard page. |
| 228 | */ |
| 229 | reserve_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn), |
| 230 | (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE) - PFN_PHYS(first_pfn)); |
| 231 | |
| 232 | /* |
| 233 | * Reserve platform dependent sections |
| 234 | */ |
| 235 | platform_reserve(); |
| 236 | |
| 237 | #ifdef CONFIG_BLK_DEV_INITRD |
| 238 | if (LOADER_TYPE && INITRD_START) { |
| 239 | if (INITRD_START + INITRD_SIZE <= (PFN_PHYS(last_pfn))) { |
| 240 | reserve_bootmem_node(NODE_DATA(0), INITRD_START + __MEMORY_START, INITRD_SIZE); |
| 241 | |
Henry Nestler | 19e5d9c | 2006-12-06 20:37:45 -0800 | [diff] [blame] | 242 | initrd_start = (long) INITRD_START + PAGE_OFFSET + __MEMORY_START; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | initrd_end = initrd_start + INITRD_SIZE; |
| 244 | } else { |
| 245 | printk("initrd extends beyond end of memory " |
| 246 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
| 247 | (long) INITRD_START + INITRD_SIZE, |
| 248 | PFN_PHYS(last_pfn)); |
| 249 | initrd_start = 0; |
| 250 | } |
| 251 | } |
| 252 | #endif |
| 253 | |
| 254 | /* |
| 255 | * Claim all RAM, ROM, and I/O resources. |
| 256 | */ |
| 257 | |
| 258 | /* Kernel RAM */ |
| 259 | request_resource(&iomem_resource, &code_resource); |
| 260 | request_resource(&iomem_resource, &data_resource); |
| 261 | |
| 262 | /* Other KRAM space */ |
| 263 | for (i = 0; i < STANDARD_KRAM_RESOURCES - 2; i++) |
| 264 | request_resource(&iomem_resource, |
| 265 | &platform_parms.kram_res_p[i]); |
| 266 | |
| 267 | /* XRAM space */ |
| 268 | for (i = 0; i < STANDARD_XRAM_RESOURCES; i++) |
| 269 | request_resource(&iomem_resource, |
| 270 | &platform_parms.xram_res_p[i]); |
| 271 | |
| 272 | /* ROM space */ |
| 273 | for (i = 0; i < STANDARD_ROM_RESOURCES; i++) |
| 274 | request_resource(&iomem_resource, |
| 275 | &platform_parms.rom_res_p[i]); |
| 276 | |
| 277 | /* I/O space */ |
| 278 | for (i = 0; i < STANDARD_IO_RESOURCES; i++) |
| 279 | request_resource(&ioport_resource, |
| 280 | &platform_parms.io_res_p[i]); |
| 281 | |
| 282 | |
| 283 | #ifdef CONFIG_VT |
| 284 | #if defined(CONFIG_VGA_CONSOLE) |
| 285 | conswitchp = &vga_con; |
| 286 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 287 | conswitchp = &dummy_con; |
| 288 | #endif |
| 289 | #endif |
| 290 | |
| 291 | printk("Hardware FPU: %s\n", fpu_in_use ? "enabled" : "disabled"); |
| 292 | |
| 293 | paging_init(); |
| 294 | } |
| 295 | |
| 296 | void __xchg_called_with_bad_pointer(void) |
| 297 | { |
| 298 | printk(KERN_EMERG "xchg() called with bad pointer !\n"); |
| 299 | } |
| 300 | |
| 301 | static struct cpu cpu[1]; |
| 302 | |
| 303 | static int __init topology_init(void) |
| 304 | { |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 305 | return register_cpu(cpu, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | subsys_initcall(topology_init); |
| 309 | |
| 310 | /* |
| 311 | * Get CPU information |
| 312 | */ |
| 313 | static const char *cpu_name[] = { |
| 314 | [CPU_SH5_101] = "SH5-101", |
| 315 | [CPU_SH5_103] = "SH5-103", |
| 316 | [CPU_SH_NONE] = "Unknown", |
| 317 | }; |
| 318 | |
| 319 | const char *get_cpu_subtype(void) |
| 320 | { |
| 321 | return cpu_name[boot_cpu_data.type]; |
| 322 | } |
| 323 | |
| 324 | #ifdef CONFIG_PROC_FS |
| 325 | static int show_cpuinfo(struct seq_file *m,void *v) |
| 326 | { |
| 327 | unsigned int cpu = smp_processor_id(); |
| 328 | |
| 329 | if (!cpu) |
| 330 | seq_printf(m, "machine\t\t: %s\n", get_system_type()); |
| 331 | |
| 332 | seq_printf(m, "processor\t: %d\n", cpu); |
| 333 | seq_printf(m, "cpu family\t: SH-5\n"); |
| 334 | seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype()); |
| 335 | |
| 336 | seq_printf(m, "icache size\t: %dK-bytes\n", |
| 337 | (boot_cpu_data.icache.ways * |
| 338 | boot_cpu_data.icache.sets * |
| 339 | boot_cpu_data.icache.linesz) >> 10); |
| 340 | seq_printf(m, "dcache size\t: %dK-bytes\n", |
| 341 | (boot_cpu_data.dcache.ways * |
| 342 | boot_cpu_data.dcache.sets * |
| 343 | boot_cpu_data.dcache.linesz) >> 10); |
| 344 | seq_printf(m, "itlb entries\t: %d\n", boot_cpu_data.itlb.entries); |
| 345 | seq_printf(m, "dtlb entries\t: %d\n", boot_cpu_data.dtlb.entries); |
| 346 | |
| 347 | #define PRINT_CLOCK(name, value) \ |
| 348 | seq_printf(m, name " clock\t: %d.%02dMHz\n", \ |
| 349 | ((value) / 1000000), ((value) % 1000000)/10000) |
| 350 | |
| 351 | PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock); |
| 352 | PRINT_CLOCK("bus", boot_cpu_data.bus_clock); |
| 353 | PRINT_CLOCK("module", boot_cpu_data.module_clock); |
| 354 | |
| 355 | seq_printf(m, "bogomips\t: %lu.%02lu\n\n", |
| 356 | (loops_per_jiffy*HZ+2500)/500000, |
| 357 | ((loops_per_jiffy*HZ+2500)/5000) % 100); |
| 358 | |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 363 | { |
| 364 | return (void*)(*pos == 0); |
| 365 | } |
| 366 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 367 | { |
| 368 | return NULL; |
| 369 | } |
| 370 | static void c_stop(struct seq_file *m, void *v) |
| 371 | { |
| 372 | } |
| 373 | struct seq_operations cpuinfo_op = { |
| 374 | .start = c_start, |
| 375 | .next = c_next, |
| 376 | .stop = c_stop, |
| 377 | .show = show_cpuinfo, |
| 378 | }; |
| 379 | #endif /* CONFIG_PROC_FS */ |