Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/s390/kernel/setup.c |
| 3 | * |
| 4 | * S390 version |
| 5 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| 6 | * Author(s): Hartmut Penner (hp@de.ibm.com), |
| 7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| 8 | * |
| 9 | * Derived from "arch/i386/kernel/setup.c" |
| 10 | * Copyright (C) 1995, Linus Torvalds |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * This file handles the architecture-dependent parts of initialization |
| 15 | */ |
| 16 | |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/stddef.h> |
| 23 | #include <linux/unistd.h> |
| 24 | #include <linux/ptrace.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/user.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/tty.h> |
| 28 | #include <linux/ioport.h> |
| 29 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/init.h> |
| 31 | #include <linux/initrd.h> |
| 32 | #include <linux/bootmem.h> |
| 33 | #include <linux/root_dev.h> |
| 34 | #include <linux/console.h> |
| 35 | #include <linux/seq_file.h> |
| 36 | #include <linux/kernel_stat.h> |
Heiko Carstens | 1e8e338 | 2005-10-30 15:00:11 -0800 | [diff] [blame] | 37 | #include <linux/device.h> |
Peter Oberparleiter | 585c304 | 2006-06-29 15:08:25 +0200 | [diff] [blame] | 38 | #include <linux/notifier.h> |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 39 | #include <linux/pfn.h> |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 40 | #include <linux/ctype.h> |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 41 | #include <linux/reboot.h> |
Heiko Carstens | dbd70fb | 2008-04-17 07:46:12 +0200 | [diff] [blame] | 42 | #include <linux/topology.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Michael Holzheu | 46b05d2 | 2007-02-21 10:55:21 +0100 | [diff] [blame] | 44 | #include <asm/ipl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <asm/uaccess.h> |
| 46 | #include <asm/system.h> |
| 47 | #include <asm/smp.h> |
| 48 | #include <asm/mmu_context.h> |
| 49 | #include <asm/cpcmd.h> |
| 50 | #include <asm/lowcore.h> |
| 51 | #include <asm/irq.h> |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 52 | #include <asm/page.h> |
| 53 | #include <asm/ptrace.h> |
Heiko Carstens | cc13ad6 | 2006-06-25 05:49:30 -0700 | [diff] [blame] | 54 | #include <asm/sections.h> |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 55 | #include <asm/ebcdic.h> |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 56 | #include <asm/compat.h> |
Christian Borntraeger | faeba830 | 2008-06-20 15:24:18 +0200 | [diff] [blame] | 57 | #include <asm/kvm_virtio.h> |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 58 | |
| 59 | long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | |
| 60 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY); |
| 61 | long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | |
| 62 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | |
| 63 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | /* |
Gerald Schaefer | d02765d | 2006-09-20 15:59:42 +0200 | [diff] [blame] | 66 | * User copy operations. |
| 67 | */ |
| 68 | struct uaccess_ops uaccess; |
Martin Schwidefsky | d4ee453 | 2007-05-04 18:47:48 +0200 | [diff] [blame] | 69 | EXPORT_SYMBOL(uaccess); |
Gerald Schaefer | d02765d | 2006-09-20 15:59:42 +0200 | [diff] [blame] | 70 | |
| 71 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | * Machine setup.. |
| 73 | */ |
| 74 | unsigned int console_mode = 0; |
| 75 | unsigned int console_devno = -1; |
| 76 | unsigned int console_irq = -1; |
Heiko Carstens | 2e5061e | 2008-04-30 13:38:45 +0200 | [diff] [blame] | 77 | unsigned long machine_flags; |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 78 | unsigned long elf_hwcap = 0; |
| 79 | char elf_platform[ELF_PLATFORM_SIZE]; |
Heiko Carstens | 36a2bd4 | 2006-12-04 15:40:38 +0100 | [diff] [blame] | 80 | |
Heiko Carstens | 23d1742 | 2008-07-14 09:59:21 +0200 | [diff] [blame] | 81 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 83 | static unsigned long __initdata memory_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | * This is set up by the setup-routine at boot-time |
| 87 | * for S390 need to find out, what we have to setup |
| 88 | * using address 0x10400 ... |
| 89 | */ |
| 90 | |
| 91 | #include <asm/setup.h> |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static struct resource code_resource = { |
| 94 | .name = "Kernel code", |
| 95 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 96 | }; |
| 97 | |
| 98 | static struct resource data_resource = { |
| 99 | .name = "Kernel data", |
| 100 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 101 | }; |
| 102 | |
| 103 | /* |
| 104 | * cpu_init() initializes state that is per-CPU. |
| 105 | */ |
Heiko Carstens | ea1f4ee | 2007-05-31 17:38:05 +0200 | [diff] [blame] | 106 | void __cpuinit cpu_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | { |
| 108 | int addr = hard_smp_processor_id(); |
| 109 | |
| 110 | /* |
| 111 | * Store processor id in lowcore (used e.g. in timer_interrupt) |
| 112 | */ |
Michael Holzheu | 72960a0 | 2007-02-21 10:55:18 +0100 | [diff] [blame] | 113 | get_cpu_id(&S390_lowcore.cpu_data.cpu_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | S390_lowcore.cpu_data.cpu_addr = addr; |
| 115 | |
| 116 | /* |
| 117 | * Force FPU initialization: |
| 118 | */ |
| 119 | clear_thread_flag(TIF_USEDFPU); |
| 120 | clear_used_math(); |
| 121 | |
| 122 | atomic_inc(&init_mm.mm_count); |
| 123 | current->active_mm = &init_mm; |
| 124 | if (current->mm) |
| 125 | BUG(); |
| 126 | enter_lazy_tlb(&init_mm, current); |
| 127 | } |
| 128 | |
| 129 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | * condev= and conmode= setup parameter. |
| 131 | */ |
| 132 | |
| 133 | static int __init condev_setup(char *str) |
| 134 | { |
| 135 | int vdev; |
| 136 | |
| 137 | vdev = simple_strtoul(str, &str, 0); |
| 138 | if (vdev >= 0 && vdev < 65536) { |
| 139 | console_devno = vdev; |
| 140 | console_irq = -1; |
| 141 | } |
| 142 | return 1; |
| 143 | } |
| 144 | |
| 145 | __setup("condev=", condev_setup); |
| 146 | |
| 147 | static int __init conmode_setup(char *str) |
| 148 | { |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 149 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
| 151 | SET_CONSOLE_SCLP; |
| 152 | #endif |
| 153 | #if defined(CONFIG_TN3215_CONSOLE) |
| 154 | if (strncmp(str, "3215", 5) == 0) |
| 155 | SET_CONSOLE_3215; |
| 156 | #endif |
| 157 | #if defined(CONFIG_TN3270_CONSOLE) |
| 158 | if (strncmp(str, "3270", 5) == 0) |
| 159 | SET_CONSOLE_3270; |
| 160 | #endif |
| 161 | return 1; |
| 162 | } |
| 163 | |
| 164 | __setup("conmode=", conmode_setup); |
| 165 | |
| 166 | static void __init conmode_default(void) |
| 167 | { |
| 168 | char query_buffer[1024]; |
| 169 | char *ptr; |
| 170 | |
| 171 | if (MACHINE_IS_VM) { |
Heiko Carstens | 740b570 | 2006-12-04 15:40:30 +0100 | [diff] [blame] | 172 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
| 174 | ptr = strstr(query_buffer, "SUBCHANNEL ="); |
| 175 | console_irq = simple_strtoul(ptr + 13, NULL, 16); |
Heiko Carstens | 740b570 | 2006-12-04 15:40:30 +0100 | [diff] [blame] | 176 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | ptr = strstr(query_buffer, "CONMODE"); |
| 178 | /* |
| 179 | * Set the conmode to 3215 so that the device recognition |
| 180 | * will set the cu_type of the console to 3215. If the |
| 181 | * conmode is 3270 and we don't set it back then both |
| 182 | * 3215 and the 3270 driver will try to access the console |
| 183 | * device (3215 as console and 3270 as normal tty). |
| 184 | */ |
Heiko Carstens | 740b570 | 2006-12-04 15:40:30 +0100 | [diff] [blame] | 185 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | if (ptr == NULL) { |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 187 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | SET_CONSOLE_SCLP; |
| 189 | #endif |
| 190 | return; |
| 191 | } |
| 192 | if (strncmp(ptr + 8, "3270", 4) == 0) { |
| 193 | #if defined(CONFIG_TN3270_CONSOLE) |
| 194 | SET_CONSOLE_3270; |
| 195 | #elif defined(CONFIG_TN3215_CONSOLE) |
| 196 | SET_CONSOLE_3215; |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 197 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | SET_CONSOLE_SCLP; |
| 199 | #endif |
| 200 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { |
| 201 | #if defined(CONFIG_TN3215_CONSOLE) |
| 202 | SET_CONSOLE_3215; |
| 203 | #elif defined(CONFIG_TN3270_CONSOLE) |
| 204 | SET_CONSOLE_3270; |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 205 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | SET_CONSOLE_SCLP; |
| 207 | #endif |
| 208 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } else { |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 210 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | SET_CONSOLE_SCLP; |
| 212 | #endif |
| 213 | } |
| 214 | } |
| 215 | |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 216 | #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) |
| 217 | static void __init setup_zfcpdump(unsigned int console_devno) |
| 218 | { |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 219 | static char str[41]; |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 220 | |
| 221 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) |
| 222 | return; |
| 223 | if (console_devno != -1) |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 224 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 225 | ipl_info.data.fcp.dev_id.devno, console_devno); |
| 226 | else |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 227 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 228 | ipl_info.data.fcp.dev_id.devno); |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 229 | strcat(boot_command_line, str); |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 230 | console_loglevel = 2; |
| 231 | } |
| 232 | #else |
| 233 | static inline void setup_zfcpdump(unsigned int console_devno) {} |
| 234 | #endif /* CONFIG_ZFCPDUMP */ |
| 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | /* |
| 237 | * Reboot, halt and power_off stubs. They just call _machine_restart, |
| 238 | * _machine_halt or _machine_power_off. |
| 239 | */ |
| 240 | |
| 241 | void machine_restart(char *command) |
| 242 | { |
Christian Borntraeger | 7aa8dac | 2007-11-20 11:13:31 +0100 | [diff] [blame] | 243 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
Martin Schwidefsky | 06fa46a | 2006-06-29 14:57:32 +0200 | [diff] [blame] | 244 | /* |
| 245 | * Only unblank the console if we are called in enabled |
| 246 | * context or a bust_spinlocks cleared the way for us. |
| 247 | */ |
| 248 | console_unblank(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | _machine_restart(command); |
| 250 | } |
| 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | void machine_halt(void) |
| 253 | { |
Martin Schwidefsky | 06fa46a | 2006-06-29 14:57:32 +0200 | [diff] [blame] | 254 | if (!in_interrupt() || oops_in_progress) |
| 255 | /* |
| 256 | * Only unblank the console if we are called in enabled |
| 257 | * context or a bust_spinlocks cleared the way for us. |
| 258 | */ |
| 259 | console_unblank(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | _machine_halt(); |
| 261 | } |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | void machine_power_off(void) |
| 264 | { |
Martin Schwidefsky | 06fa46a | 2006-06-29 14:57:32 +0200 | [diff] [blame] | 265 | if (!in_interrupt() || oops_in_progress) |
| 266 | /* |
| 267 | * Only unblank the console if we are called in enabled |
| 268 | * context or a bust_spinlocks cleared the way for us. |
| 269 | */ |
| 270 | console_unblank(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | _machine_power_off(); |
| 272 | } |
| 273 | |
Martin Schwidefsky | 53df751 | 2006-01-14 13:21:01 -0800 | [diff] [blame] | 274 | /* |
| 275 | * Dummy power off function. |
| 276 | */ |
| 277 | void (*pm_power_off)(void) = machine_power_off; |
| 278 | |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 279 | static int __init early_parse_mem(char *p) |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 280 | { |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 281 | memory_end = memparse(p, &p); |
| 282 | return 0; |
| 283 | } |
| 284 | early_param("mem", early_parse_mem); |
| 285 | |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 286 | #ifdef CONFIG_S390_SWITCH_AMODE |
Carsten Otte | 402b086 | 2008-03-25 18:47:10 +0100 | [diff] [blame] | 287 | #ifdef CONFIG_PGSTE |
| 288 | unsigned int switch_amode = 1; |
| 289 | #else |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 290 | unsigned int switch_amode = 0; |
Carsten Otte | 402b086 | 2008-03-25 18:47:10 +0100 | [diff] [blame] | 291 | #endif |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 292 | EXPORT_SYMBOL_GPL(switch_amode); |
| 293 | |
Heiko Carstens | 4d284ca | 2007-02-05 21:18:53 +0100 | [diff] [blame] | 294 | static void set_amode_and_uaccess(unsigned long user_amode, |
| 295 | unsigned long user32_amode) |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 296 | { |
| 297 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | |
| 298 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | |
| 299 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; |
| 300 | #ifdef CONFIG_COMPAT |
| 301 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | |
| 302 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | |
| 303 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; |
| 304 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | |
| 305 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | |
| 306 | PSW32_MASK_PSTATE; |
| 307 | #endif |
| 308 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | |
| 309 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; |
| 310 | |
| 311 | if (MACHINE_HAS_MVCOS) { |
| 312 | printk("mvcos available.\n"); |
| 313 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
| 314 | } else { |
| 315 | printk("mvcos not available.\n"); |
| 316 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * Switch kernel/user addressing modes? |
| 322 | */ |
| 323 | static int __init early_parse_switch_amode(char *p) |
| 324 | { |
| 325 | switch_amode = 1; |
| 326 | return 0; |
| 327 | } |
| 328 | early_param("switch_amode", early_parse_switch_amode); |
| 329 | |
| 330 | #else /* CONFIG_S390_SWITCH_AMODE */ |
| 331 | static inline void set_amode_and_uaccess(unsigned long user_amode, |
| 332 | unsigned long user32_amode) |
| 333 | { |
| 334 | } |
| 335 | #endif /* CONFIG_S390_SWITCH_AMODE */ |
| 336 | |
| 337 | #ifdef CONFIG_S390_EXEC_PROTECT |
| 338 | unsigned int s390_noexec = 0; |
| 339 | EXPORT_SYMBOL_GPL(s390_noexec); |
| 340 | |
| 341 | /* |
| 342 | * Enable execute protection? |
| 343 | */ |
| 344 | static int __init early_parse_noexec(char *p) |
| 345 | { |
| 346 | if (!strncmp(p, "off", 3)) |
| 347 | return 0; |
| 348 | switch_amode = 1; |
| 349 | s390_noexec = 1; |
| 350 | return 0; |
| 351 | } |
| 352 | early_param("noexec", early_parse_noexec); |
| 353 | #endif /* CONFIG_S390_EXEC_PROTECT */ |
| 354 | |
| 355 | static void setup_addressing_mode(void) |
| 356 | { |
| 357 | if (s390_noexec) { |
| 358 | printk("S390 execute protection active, "); |
| 359 | set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY); |
Heiko Carstens | 7af0d6f | 2007-12-04 16:09:05 +0100 | [diff] [blame] | 360 | } else if (switch_amode) { |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 361 | printk("S390 address spaces switched, "); |
| 362 | set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY); |
| 363 | } |
Heiko Carstens | 411788e | 2007-11-20 11:13:32 +0100 | [diff] [blame] | 364 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 365 | sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
| 366 | io_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
| 367 | #endif |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 368 | } |
| 369 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 370 | static void __init |
| 371 | setup_lowcore(void) |
| 372 | { |
| 373 | struct _lowcore *lc; |
| 374 | int lc_pages; |
| 375 | |
| 376 | /* |
| 377 | * Setup lowcore for boot cpu |
| 378 | */ |
| 379 | lc_pages = sizeof(void *) == 8 ? 2 : 1; |
| 380 | lc = (struct _lowcore *) |
| 381 | __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); |
| 382 | memset(lc, 0, lc_pages * PAGE_SIZE); |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 383 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | lc->restart_psw.addr = |
| 385 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 386 | if (switch_amode) |
| 387 | lc->restart_psw.mask |= PSW_ASC_HOME; |
| 388 | lc->external_new_psw.mask = psw_kernel_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | lc->external_new_psw.addr = |
| 390 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 391 | lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 393 | lc->program_new_psw.mask = psw_kernel_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | lc->program_new_psw.addr = |
| 395 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 396 | lc->mcck_new_psw.mask = |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 397 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | lc->mcck_new_psw.addr = |
| 399 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 400 | lc->io_new_psw.mask = psw_kernel_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
| 402 | lc->ipl_device = S390_lowcore.ipl_device; |
Heiko Carstens | 5a62b19 | 2008-04-17 07:46:25 +0200 | [diff] [blame] | 403 | lc->clock_comparator = -1ULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
| 405 | lc->async_stack = (unsigned long) |
| 406 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | lc->panic_stack = (unsigned long) |
| 408 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
| 410 | lc->thread_info = (unsigned long) &init_thread_union; |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 411 | #ifndef CONFIG_64BIT |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 412 | if (MACHINE_HAS_IEEE) { |
| 413 | lc->extended_save_area_addr = (__u32) |
| 414 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); |
| 415 | /* enable extended save area */ |
Heiko Carstens | c4972f3 | 2006-11-06 10:49:02 +0100 | [diff] [blame] | 416 | __ctl_set_bit(14, 29); |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 417 | } |
| 418 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | set_prefix((u32)(unsigned long) lc); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | static void __init |
| 423 | setup_resources(void) |
| 424 | { |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 425 | struct resource *res, *sub_res; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 426 | int i; |
| 427 | |
Heiko Carstens | cc13ad6 | 2006-06-25 05:49:30 -0700 | [diff] [blame] | 428 | code_resource.start = (unsigned long) &_text; |
| 429 | code_resource.end = (unsigned long) &_etext - 1; |
| 430 | data_resource.start = (unsigned long) &_etext; |
| 431 | data_resource.end = (unsigned long) &_edata - 1; |
| 432 | |
Heiko Carstens | 9f4b0ba | 2008-01-26 14:11:02 +0100 | [diff] [blame] | 433 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
| 434 | if (!memory_chunk[i].size) |
| 435 | continue; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 436 | res = alloc_bootmem_low(sizeof(struct resource)); |
| 437 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
| 438 | switch (memory_chunk[i].type) { |
| 439 | case CHUNK_READ_WRITE: |
| 440 | res->name = "System RAM"; |
| 441 | break; |
| 442 | case CHUNK_READ_ONLY: |
| 443 | res->name = "System ROM"; |
| 444 | res->flags |= IORESOURCE_READONLY; |
| 445 | break; |
| 446 | default: |
| 447 | res->name = "reserved"; |
| 448 | } |
| 449 | res->start = memory_chunk[i].addr; |
| 450 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; |
| 451 | request_resource(&iomem_resource, res); |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 452 | |
| 453 | if (code_resource.start >= res->start && |
| 454 | code_resource.start <= res->end && |
| 455 | code_resource.end > res->end) { |
| 456 | sub_res = alloc_bootmem_low(sizeof(struct resource)); |
| 457 | memcpy(sub_res, &code_resource, |
| 458 | sizeof(struct resource)); |
| 459 | sub_res->end = res->end; |
| 460 | code_resource.start = res->end + 1; |
| 461 | request_resource(res, sub_res); |
| 462 | } |
| 463 | |
| 464 | if (code_resource.start >= res->start && |
| 465 | code_resource.start <= res->end && |
| 466 | code_resource.end <= res->end) |
| 467 | request_resource(res, &code_resource); |
| 468 | |
| 469 | if (data_resource.start >= res->start && |
| 470 | data_resource.start <= res->end && |
| 471 | data_resource.end > res->end) { |
| 472 | sub_res = alloc_bootmem_low(sizeof(struct resource)); |
| 473 | memcpy(sub_res, &data_resource, |
| 474 | sizeof(struct resource)); |
| 475 | sub_res->end = res->end; |
| 476 | data_resource.start = res->end + 1; |
| 477 | request_resource(res, sub_res); |
| 478 | } |
| 479 | |
| 480 | if (data_resource.start >= res->start && |
| 481 | data_resource.start <= res->end && |
| 482 | data_resource.end <= res->end) |
| 483 | request_resource(res, &data_resource); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 484 | } |
| 485 | } |
| 486 | |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 487 | unsigned long real_memory_size; |
| 488 | EXPORT_SYMBOL_GPL(real_memory_size); |
| 489 | |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 490 | static void __init setup_memory_end(void) |
| 491 | { |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 492 | unsigned long memory_size; |
Christian Borntraeger | 5fd9c6e | 2008-01-26 14:11:00 +0100 | [diff] [blame] | 493 | unsigned long max_mem; |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 494 | int i; |
| 495 | |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 496 | #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) |
| 497 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) |
| 498 | memory_end = ZFCPDUMP_HSA_SIZE; |
| 499 | #endif |
| 500 | memory_size = 0; |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 501 | memory_end &= PAGE_MASK; |
| 502 | |
Heiko Carstens | 0189103 | 2008-02-05 16:50:49 +0100 | [diff] [blame] | 503 | max_mem = memory_end ? min(VMEM_MAX_PHYS, memory_end) : VMEM_MAX_PHYS; |
Christian Borntraeger | 5fd9c6e | 2008-01-26 14:11:00 +0100 | [diff] [blame] | 504 | memory_end = min(max_mem, memory_end); |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 505 | |
Heiko Carstens | 9f4b0ba | 2008-01-26 14:11:02 +0100 | [diff] [blame] | 506 | /* |
| 507 | * Make sure all chunks are MAX_ORDER aligned so we don't need the |
| 508 | * extra checks that HOLES_IN_ZONE would require. |
| 509 | */ |
| 510 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
| 511 | unsigned long start, end; |
| 512 | struct mem_chunk *chunk; |
| 513 | unsigned long align; |
| 514 | |
| 515 | chunk = &memory_chunk[i]; |
| 516 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); |
| 517 | start = (chunk->addr + align - 1) & ~(align - 1); |
| 518 | end = (chunk->addr + chunk->size) & ~(align - 1); |
| 519 | if (start >= end) |
| 520 | memset(chunk, 0, sizeof(*chunk)); |
| 521 | else { |
| 522 | chunk->addr = start; |
| 523 | chunk->size = end - start; |
| 524 | } |
| 525 | } |
| 526 | |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 527 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
| 528 | struct mem_chunk *chunk = &memory_chunk[i]; |
| 529 | |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 530 | real_memory_size = max(real_memory_size, |
| 531 | chunk->addr + chunk->size); |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 532 | if (chunk->addr >= max_mem) { |
| 533 | memset(chunk, 0, sizeof(*chunk)); |
| 534 | continue; |
| 535 | } |
| 536 | if (chunk->addr + chunk->size > max_mem) |
| 537 | chunk->size = max_mem - chunk->addr; |
| 538 | memory_size = max(memory_size, chunk->addr + chunk->size); |
| 539 | } |
| 540 | if (!memory_end) |
| 541 | memory_end = memory_size; |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 542 | } |
| 543 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 544 | static void __init |
| 545 | setup_memory(void) |
| 546 | { |
| 547 | unsigned long bootmap_size; |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 548 | unsigned long start_pfn, end_pfn; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 549 | int i; |
| 550 | |
| 551 | /* |
| 552 | * partially used pages are not usable - thus |
| 553 | * we are rounding upwards: |
| 554 | */ |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 555 | start_pfn = PFN_UP(__pa(&_end)); |
| 556 | end_pfn = max_pfn = PFN_DOWN(memory_end); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 557 | |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 558 | #ifdef CONFIG_BLK_DEV_INITRD |
| 559 | /* |
| 560 | * Move the initrd in case the bitmap of the bootmem allocater |
| 561 | * would overwrite it. |
| 562 | */ |
| 563 | |
| 564 | if (INITRD_START && INITRD_SIZE) { |
| 565 | unsigned long bmap_size; |
| 566 | unsigned long start; |
| 567 | |
| 568 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); |
| 569 | bmap_size = PFN_PHYS(bmap_size); |
| 570 | |
| 571 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { |
| 572 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; |
| 573 | |
| 574 | if (start + INITRD_SIZE > memory_end) { |
| 575 | printk("initrd extends beyond end of memory " |
| 576 | "(0x%08lx > 0x%08lx)\n" |
| 577 | "disabling initrd\n", |
| 578 | start + INITRD_SIZE, memory_end); |
| 579 | INITRD_START = INITRD_SIZE = 0; |
| 580 | } else { |
| 581 | printk("Moving initrd (0x%08lx -> 0x%08lx, " |
| 582 | "size: %ld)\n", |
| 583 | INITRD_START, start, INITRD_SIZE); |
| 584 | memmove((void *) start, (void *) INITRD_START, |
| 585 | INITRD_SIZE); |
| 586 | INITRD_START = start; |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | #endif |
| 591 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 592 | /* |
Heiko Carstens | 7676bef | 2006-10-04 20:02:19 +0200 | [diff] [blame] | 593 | * Initialize the boot-time allocator |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 594 | */ |
| 595 | bootmap_size = init_bootmem(start_pfn, end_pfn); |
| 596 | |
| 597 | /* |
| 598 | * Register RAM areas with the bootmem allocator. |
| 599 | */ |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 600 | |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 601 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 602 | unsigned long start_chunk, end_chunk, pfn; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 603 | |
| 604 | if (memory_chunk[i].type != CHUNK_READ_WRITE) |
| 605 | continue; |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 606 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
| 607 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1; |
| 608 | end_chunk = min(end_chunk, end_pfn); |
| 609 | if (start_chunk >= end_chunk) |
| 610 | continue; |
| 611 | add_active_range(0, start_chunk, end_chunk); |
| 612 | pfn = max(start_chunk, start_pfn); |
| 613 | for (; pfn <= end_chunk; pfn++) |
| 614 | page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 617 | psw_set_key(PAGE_DEFAULT_KEY); |
| 618 | |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 619 | free_bootmem_with_active_regions(0, max_pfn); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 620 | |
| 621 | /* |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 622 | * Reserve memory used for lowcore/command line/kernel image. |
| 623 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 624 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 625 | reserve_bootmem((unsigned long)_stext, |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 626 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
| 627 | BOOTMEM_DEFAULT); |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 628 | /* |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 629 | * Reserve the bootmem bitmap itself as well. We do this in two |
| 630 | * steps (first step was init_bootmem()) because this catches |
| 631 | * the (very unlikely) case of us accidentally initializing the |
| 632 | * bootmem allocator with an invalid RAM area. |
| 633 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 634 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
| 635 | BOOTMEM_DEFAULT); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 636 | |
| 637 | #ifdef CONFIG_BLK_DEV_INITRD |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 638 | if (INITRD_START && INITRD_SIZE) { |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 639 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 640 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
| 641 | BOOTMEM_DEFAULT); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 642 | initrd_start = INITRD_START; |
| 643 | initrd_end = initrd_start + INITRD_SIZE; |
| 644 | } else { |
| 645 | printk("initrd extends beyond end of memory " |
| 646 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
| 647 | initrd_start + INITRD_SIZE, memory_end); |
| 648 | initrd_start = initrd_end = 0; |
| 649 | } |
| 650 | } |
| 651 | #endif |
| 652 | } |
| 653 | |
Heiko Carstens | 7b758389 | 2008-04-17 07:46:11 +0200 | [diff] [blame] | 654 | static int __init __stfle(unsigned long long *list, int doublewords) |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 655 | { |
| 656 | typedef struct { unsigned long long _[doublewords]; } addrtype; |
| 657 | register unsigned long __nr asm("0") = doublewords - 1; |
| 658 | |
| 659 | asm volatile(".insn s,0xb2b00000,%0" /* stfle */ |
| 660 | : "=m" (*(addrtype *) list), "+d" (__nr) : : "cc"); |
| 661 | return __nr + 1; |
| 662 | } |
| 663 | |
Heiko Carstens | 7b758389 | 2008-04-17 07:46:11 +0200 | [diff] [blame] | 664 | int __init stfle(unsigned long long *list, int doublewords) |
| 665 | { |
| 666 | if (!(stfl() & (1UL << 24))) |
| 667 | return -EOPNOTSUPP; |
| 668 | return __stfle(list, doublewords); |
| 669 | } |
| 670 | |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 671 | /* |
| 672 | * Setup hardware capabilities. |
| 673 | */ |
| 674 | static void __init setup_hwcaps(void) |
| 675 | { |
| 676 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; |
| 677 | struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data; |
| 678 | unsigned long long facility_list_extended; |
| 679 | unsigned int facility_list; |
| 680 | int i; |
| 681 | |
| 682 | facility_list = stfl(); |
| 683 | /* |
| 684 | * The store facility list bits numbers as found in the principles |
| 685 | * of operation are numbered with bit 1UL<<31 as number 0 to |
| 686 | * bit 1UL<<0 as number 31. |
| 687 | * Bit 0: instructions named N3, "backported" to esa-mode |
| 688 | * Bit 2: z/Architecture mode is active |
| 689 | * Bit 7: the store-facility-list-extended facility is installed |
| 690 | * Bit 17: the message-security assist is installed |
| 691 | * Bit 19: the long-displacement facility is installed |
| 692 | * Bit 21: the extended-immediate facility is installed |
| 693 | * These get translated to: |
| 694 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, |
| 695 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, |
| 696 | * HWCAP_S390_LDISP bit 4, and HWCAP_S390_EIMM bit 5. |
| 697 | */ |
| 698 | for (i = 0; i < 6; i++) |
| 699 | if (facility_list & (1UL << (31 - stfl_bits[i]))) |
| 700 | elf_hwcap |= 1UL << i; |
| 701 | |
| 702 | /* |
| 703 | * Check for additional facilities with store-facility-list-extended. |
| 704 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 |
| 705 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information |
| 706 | * as stored by stfl, bits 32-xxx contain additional facilities. |
| 707 | * How many facility words are stored depends on the number of |
| 708 | * doublewords passed to the instruction. The additional facilites |
| 709 | * are: |
| 710 | * Bit 43: decimal floating point facility is installed |
| 711 | * translated to: |
| 712 | * HWCAP_S390_DFP bit 6. |
| 713 | */ |
| 714 | if ((elf_hwcap & (1UL << 2)) && |
Heiko Carstens | 7b758389 | 2008-04-17 07:46:11 +0200 | [diff] [blame] | 715 | __stfle(&facility_list_extended, 1) > 0) { |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 716 | if (facility_list_extended & (1ULL << (64 - 43))) |
| 717 | elf_hwcap |= 1UL << 6; |
| 718 | } |
| 719 | |
Gerald Schaefer | 53492b1 | 2008-04-30 13:38:46 +0200 | [diff] [blame] | 720 | if (MACHINE_HAS_HPAGE) |
| 721 | elf_hwcap |= 1UL << 7; |
| 722 | |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 723 | switch (cpuinfo->cpu_id.machine) { |
| 724 | case 0x9672: |
| 725 | #if !defined(CONFIG_64BIT) |
| 726 | default: /* Use "g5" as default for 31 bit kernels. */ |
| 727 | #endif |
| 728 | strcpy(elf_platform, "g5"); |
| 729 | break; |
| 730 | case 0x2064: |
| 731 | case 0x2066: |
| 732 | #if defined(CONFIG_64BIT) |
| 733 | default: /* Use "z900" as default for 64 bit kernels. */ |
| 734 | #endif |
| 735 | strcpy(elf_platform, "z900"); |
| 736 | break; |
| 737 | case 0x2084: |
| 738 | case 0x2086: |
| 739 | strcpy(elf_platform, "z990"); |
| 740 | break; |
| 741 | case 0x2094: |
| 742 | strcpy(elf_platform, "z9-109"); |
| 743 | break; |
| 744 | } |
| 745 | } |
| 746 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 747 | /* |
| 748 | * Setup function called from init/main.c just after the banner |
| 749 | * was printed. |
| 750 | */ |
| 751 | |
| 752 | void __init |
| 753 | setup_arch(char **cmdline_p) |
| 754 | { |
| 755 | /* |
| 756 | * print what head.S has found out about the machine |
| 757 | */ |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 758 | #ifndef CONFIG_64BIT |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 759 | printk((MACHINE_IS_VM) ? |
| 760 | "We are running under VM (31 bit mode)\n" : |
| 761 | "We are running native (31 bit mode)\n"); |
| 762 | printk((MACHINE_HAS_IEEE) ? |
| 763 | "This machine has an IEEE fpu\n" : |
| 764 | "This machine has no IEEE fpu\n"); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 765 | #else /* CONFIG_64BIT */ |
Carsten Otte | fa58774 | 2008-03-25 18:47:44 +0100 | [diff] [blame] | 766 | if (MACHINE_IS_VM) |
| 767 | printk("We are running under VM (64 bit mode)\n"); |
| 768 | else if (MACHINE_IS_KVM) { |
| 769 | printk("We are running under KVM (64 bit mode)\n"); |
Christian Borntraeger | faeba830 | 2008-06-20 15:24:18 +0200 | [diff] [blame] | 770 | add_preferred_console("hvc", 0, NULL); |
| 771 | s390_virtio_console_init(); |
Carsten Otte | fa58774 | 2008-03-25 18:47:44 +0100 | [diff] [blame] | 772 | } else |
| 773 | printk("We are running native (64 bit mode)\n"); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 774 | #endif /* CONFIG_64BIT */ |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 775 | |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 776 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
| 777 | /* boot_command_line has been already set up in early.c */ |
| 778 | *cmdline_p = boot_command_line; |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 779 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 780 | ROOT_DEV = Root_RAM0; |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 781 | |
| 782 | init_mm.start_code = PAGE_OFFSET; |
| 783 | init_mm.end_code = (unsigned long) &_etext; |
| 784 | init_mm.end_data = (unsigned long) &_edata; |
| 785 | init_mm.brk = (unsigned long) &_end; |
| 786 | |
Gerald Schaefer | 6c2a9e6 | 2006-09-20 15:59:44 +0200 | [diff] [blame] | 787 | if (MACHINE_HAS_MVCOS) |
| 788 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); |
| 789 | else |
| 790 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); |
| 791 | |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 792 | parse_early_param(); |
| 793 | |
Michael Holzheu | 99ca4e5 | 2008-01-26 14:11:11 +0100 | [diff] [blame] | 794 | setup_ipl(); |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 795 | setup_memory_end(); |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 796 | setup_addressing_mode(); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 797 | setup_memory(); |
| 798 | setup_resources(); |
| 799 | setup_lowcore(); |
| 800 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | cpu_init(); |
| 802 | __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; |
Heiko Carstens | dbd70fb | 2008-04-17 07:46:12 +0200 | [diff] [blame] | 803 | s390_init_cpu_topology(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
| 805 | /* |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 806 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). |
| 807 | */ |
| 808 | setup_hwcaps(); |
| 809 | |
| 810 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | * Create kernel page tables and switch to virtual addressing. |
| 812 | */ |
| 813 | paging_init(); |
| 814 | |
| 815 | /* Setup default console */ |
| 816 | conmode_default(); |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 817 | |
| 818 | /* Setup zfcpdump support */ |
| 819 | setup_zfcpdump(console_devno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | } |
| 821 | |
Heiko Carstens | ea1f4ee | 2007-05-31 17:38:05 +0200 | [diff] [blame] | 822 | void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | { |
Heiko Carstens | 08d0796 | 2008-01-26 14:10:56 +0100 | [diff] [blame] | 824 | printk(KERN_INFO "cpu %d " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | #ifdef CONFIG_SMP |
| 826 | "phys_idx=%d " |
| 827 | #endif |
| 828 | "vers=%02X ident=%06X machine=%04X unused=%04X\n", |
| 829 | cpuinfo->cpu_nr, |
| 830 | #ifdef CONFIG_SMP |
| 831 | cpuinfo->cpu_addr, |
| 832 | #endif |
| 833 | cpuinfo->cpu_id.version, |
| 834 | cpuinfo->cpu_id.ident, |
| 835 | cpuinfo->cpu_id.machine, |
| 836 | cpuinfo->cpu_id.unused); |
| 837 | } |
| 838 | |
| 839 | /* |
| 840 | * show_cpuinfo - Get information on one CPU for use by procfs. |
| 841 | */ |
| 842 | |
| 843 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 844 | { |
Gerald Schaefer | 53492b1 | 2008-04-30 13:38:46 +0200 | [diff] [blame] | 845 | static const char *hwcap_str[8] = { |
| 846 | "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp", |
| 847 | "edat" |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 848 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | struct cpuinfo_S390 *cpuinfo; |
| 850 | unsigned long n = (unsigned long) v - 1; |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 851 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
Martin Schwidefsky | 31ee4b2 | 2007-02-05 21:18:31 +0100 | [diff] [blame] | 853 | s390_adjust_jiffies(); |
Heiko Carstens | b7ae9dd | 2005-09-16 19:27:34 -0700 | [diff] [blame] | 854 | preempt_disable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | if (!n) { |
| 856 | seq_printf(m, "vendor_id : IBM/S390\n" |
| 857 | "# processors : %i\n" |
| 858 | "bogomips per cpu: %lu.%02lu\n", |
| 859 | num_online_cpus(), loops_per_jiffy/(500000/HZ), |
| 860 | (loops_per_jiffy/(5000/HZ))%100); |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 861 | seq_puts(m, "features\t: "); |
Gerald Schaefer | 53492b1 | 2008-04-30 13:38:46 +0200 | [diff] [blame] | 862 | for (i = 0; i < 8; i++) |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 863 | if (hwcap_str[i] && (elf_hwcap & (1UL << i))) |
| 864 | seq_printf(m, "%s ", hwcap_str[i]); |
| 865 | seq_puts(m, "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | } |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | if (cpu_online(n)) { |
| 869 | #ifdef CONFIG_SMP |
| 870 | if (smp_processor_id() == n) |
| 871 | cpuinfo = &S390_lowcore.cpu_data; |
| 872 | else |
| 873 | cpuinfo = &lowcore_ptr[n]->cpu_data; |
| 874 | #else |
| 875 | cpuinfo = &S390_lowcore.cpu_data; |
| 876 | #endif |
| 877 | seq_printf(m, "processor %li: " |
| 878 | "version = %02X, " |
| 879 | "identification = %06X, " |
| 880 | "machine = %04X\n", |
| 881 | n, cpuinfo->cpu_id.version, |
| 882 | cpuinfo->cpu_id.ident, |
| 883 | cpuinfo->cpu_id.machine); |
| 884 | } |
Heiko Carstens | b7ae9dd | 2005-09-16 19:27:34 -0700 | [diff] [blame] | 885 | preempt_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | return 0; |
| 887 | } |
| 888 | |
| 889 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 890 | { |
| 891 | return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; |
| 892 | } |
| 893 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 894 | { |
| 895 | ++*pos; |
| 896 | return c_start(m, pos); |
| 897 | } |
| 898 | static void c_stop(struct seq_file *m, void *v) |
| 899 | { |
| 900 | } |
Jan Engelhardt | 5c81cdb | 2008-01-26 14:11:29 +0100 | [diff] [blame] | 901 | const struct seq_operations cpuinfo_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | .start = c_start, |
| 903 | .next = c_next, |
| 904 | .stop = c_stop, |
| 905 | .show = show_cpuinfo, |
| 906 | }; |
| 907 | |