David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 1 | /* MN10300 Arch-specific initialisation |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public Licence |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the Licence, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/stddef.h> |
| 16 | #include <linux/unistd.h> |
| 17 | #include <linux/ptrace.h> |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 18 | #include <linux/user.h> |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 19 | #include <linux/tty.h> |
| 20 | #include <linux/ioport.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/bootmem.h> |
| 24 | #include <linux/seq_file.h> |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 25 | #include <linux/cpu.h> |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 26 | #include <asm/processor.h> |
| 27 | #include <linux/console.h> |
| 28 | #include <asm/uaccess.h> |
| 29 | #include <asm/system.h> |
| 30 | #include <asm/setup.h> |
| 31 | #include <asm/io.h> |
| 32 | #include <asm/smp.h> |
David Howells | 2f2a213 | 2009-04-10 14:33:48 +0100 | [diff] [blame] | 33 | #include <proc/proc.h> |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 34 | #include <asm/fpu.h> |
| 35 | #include <asm/sections.h> |
| 36 | |
| 37 | struct mn10300_cpuinfo boot_cpu_data; |
| 38 | |
| 39 | /* For PCI or other memory-mapped resources */ |
| 40 | unsigned long pci_mem_start = 0x18000000; |
| 41 | |
| 42 | char redboot_command_line[COMMAND_LINE_SIZE] = |
| 43 | "console=ttyS0,115200 root=/dev/mtdblock3 rw"; |
| 44 | |
| 45 | char __initdata redboot_platform_name[COMMAND_LINE_SIZE]; |
| 46 | |
| 47 | static struct resource code_resource = { |
| 48 | .start = 0x100000, |
| 49 | .end = 0, |
| 50 | .name = "Kernel code", |
| 51 | }; |
| 52 | |
| 53 | static struct resource data_resource = { |
| 54 | .start = 0, |
| 55 | .end = 0, |
| 56 | .name = "Kernel data", |
| 57 | }; |
| 58 | |
| 59 | static unsigned long __initdata phys_memory_base; |
| 60 | static unsigned long __initdata phys_memory_end; |
| 61 | static unsigned long __initdata memory_end; |
| 62 | unsigned long memory_size; |
| 63 | |
| 64 | struct thread_info *__current_ti = &init_thread_union.thread_info; |
| 65 | struct task_struct *__current = &init_task; |
| 66 | |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 67 | #define mn10300_known_cpus 5 |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 68 | static const char *const mn10300_cputypes[] = { |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 69 | "am33-1", |
| 70 | "am33-2", |
| 71 | "am34-1", |
| 72 | "am33-3", |
| 73 | "am34-2", |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 74 | "unknown" |
| 75 | }; |
| 76 | |
| 77 | /* |
| 78 | * |
| 79 | */ |
| 80 | static void __init parse_mem_cmdline(char **cmdline_p) |
| 81 | { |
| 82 | char *from, *to, c; |
| 83 | |
| 84 | /* save unparsed command line copy for /proc/cmdline */ |
| 85 | strcpy(boot_command_line, redboot_command_line); |
| 86 | |
| 87 | /* see if there's an explicit memory size option */ |
| 88 | from = redboot_command_line; |
| 89 | to = redboot_command_line; |
| 90 | c = ' '; |
| 91 | |
| 92 | for (;;) { |
| 93 | if (c == ' ' && !memcmp(from, "mem=", 4)) { |
| 94 | if (to != redboot_command_line) |
| 95 | to--; |
| 96 | memory_size = memparse(from + 4, &from); |
| 97 | } |
| 98 | |
| 99 | c = *(from++); |
| 100 | if (!c) |
| 101 | break; |
| 102 | |
| 103 | *(to++) = c; |
| 104 | } |
| 105 | |
| 106 | *to = '\0'; |
| 107 | *cmdline_p = redboot_command_line; |
| 108 | |
| 109 | if (memory_size == 0) |
| 110 | panic("Memory size not known\n"); |
| 111 | |
| 112 | memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS + |
| 113 | memory_size; |
| 114 | if (memory_end > phys_memory_end) |
| 115 | memory_end = phys_memory_end; |
| 116 | } |
| 117 | |
| 118 | /* |
| 119 | * architecture specific setup |
| 120 | */ |
| 121 | void __init setup_arch(char **cmdline_p) |
| 122 | { |
| 123 | unsigned long bootmap_size; |
| 124 | unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn; |
| 125 | |
| 126 | cpu_init(); |
| 127 | unit_setup(); |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 128 | smp_init_cpus(); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 129 | parse_mem_cmdline(cmdline_p); |
| 130 | |
| 131 | init_mm.start_code = (unsigned long)&_text; |
| 132 | init_mm.end_code = (unsigned long) &_etext; |
| 133 | init_mm.end_data = (unsigned long) &_edata; |
| 134 | init_mm.brk = (unsigned long) &_end; |
| 135 | |
| 136 | code_resource.start = virt_to_bus(&_text); |
| 137 | code_resource.end = virt_to_bus(&_etext)-1; |
| 138 | data_resource.start = virt_to_bus(&_etext); |
| 139 | data_resource.end = virt_to_bus(&_edata)-1; |
| 140 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 141 | start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT); |
| 142 | kstart_pfn = PFN_UP(__pa(&_text)); |
| 143 | free_pfn = PFN_UP(__pa(&_end)); |
| 144 | end_pfn = PFN_DOWN(__pa(memory_end)); |
| 145 | |
| 146 | bootmap_size = init_bootmem_node(&contig_page_data, |
| 147 | free_pfn, |
| 148 | start_pfn, |
| 149 | end_pfn); |
| 150 | |
| 151 | if (kstart_pfn > start_pfn) |
| 152 | free_bootmem(PFN_PHYS(start_pfn), |
| 153 | PFN_PHYS(kstart_pfn - start_pfn)); |
| 154 | |
| 155 | free_bootmem(PFN_PHYS(free_pfn), |
| 156 | PFN_PHYS(end_pfn - free_pfn)); |
| 157 | |
| 158 | /* If interrupt vector table is in main ram, then we need to |
| 159 | reserve the page it is occupying. */ |
| 160 | if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS && |
| 161 | CONFIG_INTERRUPT_VECTOR_BASE < memory_end) |
Akira Takeuchi | c7f8d6f | 2008-12-10 12:43:39 +0000 | [diff] [blame] | 162 | reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 163 | BOOTMEM_DEFAULT); |
| 164 | |
| 165 | reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size, |
| 166 | BOOTMEM_DEFAULT); |
| 167 | |
| 168 | #ifdef CONFIG_VT |
| 169 | #if defined(CONFIG_VGA_CONSOLE) |
| 170 | conswitchp = &vga_con; |
| 171 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 172 | conswitchp = &dummy_con; |
| 173 | #endif |
| 174 | #endif |
| 175 | |
| 176 | paging_init(); |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * perform CPU initialisation |
| 181 | */ |
| 182 | void __init cpu_init(void) |
| 183 | { |
| 184 | unsigned long cpurev = CPUREV, type; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 185 | |
| 186 | type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S; |
| 187 | if (type > mn10300_known_cpus) |
| 188 | type = mn10300_known_cpus; |
| 189 | |
Akira Takeuchi | a5e03ca | 2010-10-27 17:29:00 +0100 | [diff] [blame] | 190 | printk(KERN_INFO "Panasonic %s, rev %ld\n", |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 191 | mn10300_cputypes[type], |
| 192 | (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S); |
| 193 | |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 194 | get_mem_info(&phys_memory_base, &memory_size); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 195 | phys_memory_end = phys_memory_base + memory_size; |
| 196 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 197 | fpu_init_state(); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 198 | } |
| 199 | |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 200 | static struct cpu cpu_devices[NR_CPUS]; |
| 201 | |
| 202 | static int __init topology_init(void) |
| 203 | { |
| 204 | int i; |
| 205 | |
| 206 | for_each_present_cpu(i) |
| 207 | register_cpu(&cpu_devices[i], i); |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | subsys_initcall(topology_init); |
| 213 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 214 | /* |
| 215 | * Get CPU information for use by the procfs. |
| 216 | */ |
| 217 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 218 | { |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 219 | #ifdef CONFIG_SMP |
| 220 | struct mn10300_cpuinfo *c = v; |
| 221 | unsigned long cpu_id = c - cpu_data; |
| 222 | unsigned long cpurev = c->type, type, icachesz, dcachesz; |
| 223 | #else /* CONFIG_SMP */ |
| 224 | unsigned long cpu_id = 0; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 225 | unsigned long cpurev = CPUREV, type, icachesz, dcachesz; |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 226 | #endif /* CONFIG_SMP */ |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 227 | |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 228 | #ifdef CONFIG_SMP |
| 229 | if (!cpu_online(cpu_id)) |
| 230 | return 0; |
| 231 | #endif |
| 232 | |
| 233 | type = (cpurev & CPUREV_TYPE) >> CPUREV_TYPE_S; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 234 | if (type > mn10300_known_cpus) |
| 235 | type = mn10300_known_cpus; |
| 236 | |
| 237 | icachesz = |
| 238 | ((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S) * |
| 239 | ((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) * |
| 240 | 1024; |
| 241 | |
| 242 | dcachesz = |
| 243 | ((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S) * |
| 244 | ((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) * |
| 245 | 1024; |
| 246 | |
| 247 | seq_printf(m, |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 248 | "processor : %ld\n" |
Akira Takeuchi | a5e03ca | 2010-10-27 17:29:00 +0100 | [diff] [blame] | 249 | "vendor_id : " PROCESSOR_VENDOR_NAME "\n" |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 250 | "cpu core : %s\n" |
| 251 | "cpu rev : %lu\n" |
| 252 | "model name : " PROCESSOR_MODEL_NAME "\n" |
| 253 | "icache size: %lu\n" |
| 254 | "dcache size: %lu\n", |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 255 | cpu_id, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 256 | mn10300_cputypes[type], |
| 257 | (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S, |
| 258 | icachesz, |
| 259 | dcachesz |
| 260 | ); |
| 261 | |
| 262 | seq_printf(m, |
| 263 | "ioclk speed: %lu.%02luMHz\n" |
| 264 | "bogomips : %lu.%02lu\n\n", |
| 265 | MN10300_IOCLK / 1000000, |
| 266 | (MN10300_IOCLK / 10000) % 100, |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 267 | #ifdef CONFIG_SMP |
| 268 | c->loops_per_jiffy / (500000 / HZ), |
| 269 | (c->loops_per_jiffy / (5000 / HZ)) % 100 |
| 270 | #else /* CONFIG_SMP */ |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 271 | loops_per_jiffy / (500000 / HZ), |
| 272 | (loops_per_jiffy / (5000 / HZ)) % 100 |
Akira Takeuchi | 368dd5a | 2010-10-27 17:28:55 +0100 | [diff] [blame] | 273 | #endif /* CONFIG_SMP */ |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 274 | ); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 280 | { |
| 281 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; |
| 282 | } |
| 283 | |
| 284 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 285 | { |
| 286 | ++*pos; |
| 287 | return c_start(m, pos); |
| 288 | } |
| 289 | |
| 290 | static void c_stop(struct seq_file *m, void *v) |
| 291 | { |
| 292 | } |
| 293 | |
James Morris | 88e9d34 | 2009-09-22 16:43:43 -0700 | [diff] [blame] | 294 | const struct seq_operations cpuinfo_op = { |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 295 | .start = c_start, |
| 296 | .next = c_next, |
| 297 | .stop = c_stop, |
| 298 | .show = show_cpuinfo, |
| 299 | }; |