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 | |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 17 | #define KMSG_COMPONENT "setup" |
| 18 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/errno.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/mm.h> |
| 25 | #include <linux/stddef.h> |
| 26 | #include <linux/unistd.h> |
| 27 | #include <linux/ptrace.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/user.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/tty.h> |
| 31 | #include <linux/ioport.h> |
| 32 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/init.h> |
| 34 | #include <linux/initrd.h> |
| 35 | #include <linux/bootmem.h> |
| 36 | #include <linux/root_dev.h> |
| 37 | #include <linux/console.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/kernel_stat.h> |
Heiko Carstens | 1e8e338 | 2005-10-30 15:00:11 -0800 | [diff] [blame] | 39 | #include <linux/device.h> |
Peter Oberparleiter | 585c304 | 2006-06-29 15:08:25 +0200 | [diff] [blame] | 40 | #include <linux/notifier.h> |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 41 | #include <linux/pfn.h> |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 42 | #include <linux/ctype.h> |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 43 | #include <linux/reboot.h> |
Heiko Carstens | dbd70fb | 2008-04-17 07:46:12 +0200 | [diff] [blame] | 44 | #include <linux/topology.h> |
Heiko Carstens | dfd9f7a | 2009-06-12 10:26:44 +0200 | [diff] [blame] | 45 | #include <linux/ftrace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Michael Holzheu | 46b05d2 | 2007-02-21 10:55:21 +0100 | [diff] [blame] | 47 | #include <asm/ipl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <asm/uaccess.h> |
| 49 | #include <asm/system.h> |
| 50 | #include <asm/smp.h> |
| 51 | #include <asm/mmu_context.h> |
| 52 | #include <asm/cpcmd.h> |
| 53 | #include <asm/lowcore.h> |
| 54 | #include <asm/irq.h> |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 55 | #include <asm/page.h> |
| 56 | #include <asm/ptrace.h> |
Heiko Carstens | cc13ad6 | 2006-06-25 05:49:30 -0700 | [diff] [blame] | 57 | #include <asm/sections.h> |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 58 | #include <asm/ebcdic.h> |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 59 | #include <asm/compat.h> |
Christian Borntraeger | faeba830 | 2008-06-20 15:24:18 +0200 | [diff] [blame] | 60 | #include <asm/kvm_virtio.h> |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 61 | |
| 62 | long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | |
| 63 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY); |
| 64 | long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | |
| 65 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | |
| 66 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
| 68 | /* |
Gerald Schaefer | d02765d | 2006-09-20 15:59:42 +0200 | [diff] [blame] | 69 | * User copy operations. |
| 70 | */ |
| 71 | struct uaccess_ops uaccess; |
Martin Schwidefsky | d4ee453 | 2007-05-04 18:47:48 +0200 | [diff] [blame] | 72 | EXPORT_SYMBOL(uaccess); |
Gerald Schaefer | d02765d | 2006-09-20 15:59:42 +0200 | [diff] [blame] | 73 | |
| 74 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | * Machine setup.. |
| 76 | */ |
| 77 | unsigned int console_mode = 0; |
Heiko Carstens | 1485c5c | 2009-03-26 15:24:04 +0100 | [diff] [blame] | 78 | EXPORT_SYMBOL(console_mode); |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | unsigned int console_devno = -1; |
Heiko Carstens | 1485c5c | 2009-03-26 15:24:04 +0100 | [diff] [blame] | 81 | EXPORT_SYMBOL(console_devno); |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | unsigned int console_irq = -1; |
Heiko Carstens | 1485c5c | 2009-03-26 15:24:04 +0100 | [diff] [blame] | 84 | EXPORT_SYMBOL(console_irq); |
| 85 | |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 86 | unsigned long elf_hwcap = 0; |
| 87 | char elf_platform[ELF_PLATFORM_SIZE]; |
Heiko Carstens | 36a2bd4 | 2006-12-04 15:40:38 +0100 | [diff] [blame] | 88 | |
Heiko Carstens | 23d1742 | 2008-07-14 09:59:21 +0200 | [diff] [blame] | 89 | struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
Heiko Carstens | 23d75d9 | 2009-02-19 15:19:01 +0100 | [diff] [blame] | 90 | |
| 91 | int __initdata memory_end_set; |
| 92 | unsigned long __initdata memory_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Frank Munzert | 099b765 | 2009-03-26 15:23:43 +0100 | [diff] [blame] | 94 | /* An array with a pointer to the lowcore of every CPU. */ |
| 95 | struct _lowcore *lowcore_ptr[NR_CPUS]; |
| 96 | EXPORT_SYMBOL(lowcore_ptr); |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | * This is set up by the setup-routine at boot-time |
| 100 | * for S390 need to find out, what we have to setup |
| 101 | * using address 0x10400 ... |
| 102 | */ |
| 103 | |
| 104 | #include <asm/setup.h> |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | static struct resource code_resource = { |
| 107 | .name = "Kernel code", |
| 108 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 109 | }; |
| 110 | |
| 111 | static struct resource data_resource = { |
| 112 | .name = "Kernel data", |
| 113 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 114 | }; |
| 115 | |
| 116 | /* |
| 117 | * cpu_init() initializes state that is per-CPU. |
| 118 | */ |
Heiko Carstens | ea1f4ee | 2007-05-31 17:38:05 +0200 | [diff] [blame] | 119 | void __cpuinit cpu_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /* |
| 122 | * Store processor id in lowcore (used e.g. in timer_interrupt) |
| 123 | */ |
Martin Schwidefsky | 7b46848 | 2009-03-26 15:24:42 +0100 | [diff] [blame] | 124 | get_cpu_id(&S390_lowcore.cpu_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | atomic_inc(&init_mm.mm_count); |
| 127 | current->active_mm = &init_mm; |
Stoyan Gaydarov | 6aa0d3a | 2009-03-26 15:24:47 +0100 | [diff] [blame] | 128 | BUG_ON(current->mm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | enter_lazy_tlb(&init_mm, current); |
| 130 | } |
| 131 | |
| 132 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | * condev= and conmode= setup parameter. |
| 134 | */ |
| 135 | |
| 136 | static int __init condev_setup(char *str) |
| 137 | { |
| 138 | int vdev; |
| 139 | |
| 140 | vdev = simple_strtoul(str, &str, 0); |
| 141 | if (vdev >= 0 && vdev < 65536) { |
| 142 | console_devno = vdev; |
| 143 | console_irq = -1; |
| 144 | } |
| 145 | return 1; |
| 146 | } |
| 147 | |
| 148 | __setup("condev=", condev_setup); |
| 149 | |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 150 | static void __init set_preferred_console(void) |
| 151 | { |
Hendrik Brueckner | c4de0c1 | 2009-09-11 10:28:56 +0200 | [diff] [blame] | 152 | if (MACHINE_IS_KVM) |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 153 | add_preferred_console("hvc", 0, NULL); |
Hendrik Brueckner | c4de0c1 | 2009-09-11 10:28:56 +0200 | [diff] [blame] | 154 | else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 155 | add_preferred_console("ttyS", 0, NULL); |
Hendrik Brueckner | c4de0c1 | 2009-09-11 10:28:56 +0200 | [diff] [blame] | 156 | else if (CONSOLE_IS_3270) |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 157 | add_preferred_console("tty3270", 0, NULL); |
| 158 | } |
| 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | static int __init conmode_setup(char *str) |
| 161 | { |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 162 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) |
| 164 | SET_CONSOLE_SCLP; |
| 165 | #endif |
| 166 | #if defined(CONFIG_TN3215_CONSOLE) |
| 167 | if (strncmp(str, "3215", 5) == 0) |
| 168 | SET_CONSOLE_3215; |
| 169 | #endif |
| 170 | #if defined(CONFIG_TN3270_CONSOLE) |
| 171 | if (strncmp(str, "3270", 5) == 0) |
| 172 | SET_CONSOLE_3270; |
| 173 | #endif |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 174 | set_preferred_console(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | return 1; |
| 176 | } |
| 177 | |
| 178 | __setup("conmode=", conmode_setup); |
| 179 | |
| 180 | static void __init conmode_default(void) |
| 181 | { |
| 182 | char query_buffer[1024]; |
| 183 | char *ptr; |
| 184 | |
| 185 | if (MACHINE_IS_VM) { |
Heiko Carstens | 740b570 | 2006-12-04 15:40:30 +0100 | [diff] [blame] | 186 | cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | console_devno = simple_strtoul(query_buffer + 5, NULL, 16); |
| 188 | ptr = strstr(query_buffer, "SUBCHANNEL ="); |
| 189 | console_irq = simple_strtoul(ptr + 13, NULL, 16); |
Heiko Carstens | 740b570 | 2006-12-04 15:40:30 +0100 | [diff] [blame] | 190 | cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | ptr = strstr(query_buffer, "CONMODE"); |
| 192 | /* |
| 193 | * Set the conmode to 3215 so that the device recognition |
| 194 | * will set the cu_type of the console to 3215. If the |
| 195 | * conmode is 3270 and we don't set it back then both |
| 196 | * 3215 and the 3270 driver will try to access the console |
| 197 | * device (3215 as console and 3270 as normal tty). |
| 198 | */ |
Heiko Carstens | 740b570 | 2006-12-04 15:40:30 +0100 | [diff] [blame] | 199 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (ptr == NULL) { |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 201 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | SET_CONSOLE_SCLP; |
| 203 | #endif |
| 204 | return; |
| 205 | } |
| 206 | if (strncmp(ptr + 8, "3270", 4) == 0) { |
| 207 | #if defined(CONFIG_TN3270_CONSOLE) |
| 208 | SET_CONSOLE_3270; |
| 209 | #elif defined(CONFIG_TN3215_CONSOLE) |
| 210 | SET_CONSOLE_3215; |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 211 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | SET_CONSOLE_SCLP; |
| 213 | #endif |
| 214 | } else if (strncmp(ptr + 8, "3215", 4) == 0) { |
| 215 | #if defined(CONFIG_TN3215_CONSOLE) |
| 216 | SET_CONSOLE_3215; |
| 217 | #elif defined(CONFIG_TN3270_CONSOLE) |
| 218 | SET_CONSOLE_3270; |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 219 | #elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | SET_CONSOLE_SCLP; |
| 221 | #endif |
| 222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } else { |
Peter Oberparleiter | 8c0933e | 2008-02-05 16:50:41 +0100 | [diff] [blame] | 224 | #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | SET_CONSOLE_SCLP; |
| 226 | #endif |
| 227 | } |
| 228 | } |
| 229 | |
Michael Holzheu | 59f2e69 | 2009-03-26 15:24:46 +0100 | [diff] [blame] | 230 | #ifdef CONFIG_ZFCPDUMP |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 231 | static void __init setup_zfcpdump(unsigned int console_devno) |
| 232 | { |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 233 | static char str[41]; |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 234 | |
| 235 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) |
| 236 | return; |
| 237 | if (console_devno != -1) |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 238 | sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 239 | ipl_info.data.fcp.dev_id.devno, console_devno); |
| 240 | else |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 241 | sprintf(str, " cio_ignore=all,!0.0.%04x", |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 242 | ipl_info.data.fcp.dev_id.devno); |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 243 | strcat(boot_command_line, str); |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 244 | console_loglevel = 2; |
| 245 | } |
| 246 | #else |
| 247 | static inline void setup_zfcpdump(unsigned int console_devno) {} |
| 248 | #endif /* CONFIG_ZFCPDUMP */ |
| 249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | /* |
| 251 | * Reboot, halt and power_off stubs. They just call _machine_restart, |
| 252 | * _machine_halt or _machine_power_off. |
| 253 | */ |
| 254 | |
| 255 | void machine_restart(char *command) |
| 256 | { |
Christian Borntraeger | 7aa8dac | 2007-11-20 11:13:31 +0100 | [diff] [blame] | 257 | if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
Martin Schwidefsky | 06fa46a | 2006-06-29 14:57:32 +0200 | [diff] [blame] | 258 | /* |
| 259 | * Only unblank the console if we are called in enabled |
| 260 | * context or a bust_spinlocks cleared the way for us. |
| 261 | */ |
| 262 | console_unblank(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | _machine_restart(command); |
| 264 | } |
| 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | void machine_halt(void) |
| 267 | { |
Martin Schwidefsky | 06fa46a | 2006-06-29 14:57:32 +0200 | [diff] [blame] | 268 | if (!in_interrupt() || oops_in_progress) |
| 269 | /* |
| 270 | * Only unblank the console if we are called in enabled |
| 271 | * context or a bust_spinlocks cleared the way for us. |
| 272 | */ |
| 273 | console_unblank(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | _machine_halt(); |
| 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | void machine_power_off(void) |
| 278 | { |
Martin Schwidefsky | 06fa46a | 2006-06-29 14:57:32 +0200 | [diff] [blame] | 279 | if (!in_interrupt() || oops_in_progress) |
| 280 | /* |
| 281 | * Only unblank the console if we are called in enabled |
| 282 | * context or a bust_spinlocks cleared the way for us. |
| 283 | */ |
| 284 | console_unblank(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | _machine_power_off(); |
| 286 | } |
| 287 | |
Martin Schwidefsky | 53df751 | 2006-01-14 13:21:01 -0800 | [diff] [blame] | 288 | /* |
| 289 | * Dummy power off function. |
| 290 | */ |
| 291 | void (*pm_power_off)(void) = machine_power_off; |
| 292 | |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 293 | static int __init early_parse_mem(char *p) |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 294 | { |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 295 | memory_end = memparse(p, &p); |
Heiko Carstens | 23d75d9 | 2009-02-19 15:19:01 +0100 | [diff] [blame] | 296 | memory_end_set = 1; |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | early_param("mem", early_parse_mem); |
| 300 | |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 301 | unsigned int user_mode = HOME_SPACE_MODE; |
| 302 | EXPORT_SYMBOL_GPL(user_mode); |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 303 | |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 304 | static int set_amode_and_uaccess(unsigned long user_amode, |
| 305 | unsigned long user32_amode) |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 306 | { |
| 307 | psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | |
| 308 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | |
| 309 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; |
| 310 | #ifdef CONFIG_COMPAT |
| 311 | psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | |
| 312 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | |
| 313 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; |
| 314 | psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | |
| 315 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | |
| 316 | PSW32_MASK_PSTATE; |
| 317 | #endif |
| 318 | psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | |
| 319 | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; |
| 320 | |
| 321 | if (MACHINE_HAS_MVCOS) { |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 322 | memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 323 | return 1; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 324 | } else { |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 325 | memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 326 | return 0; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 327 | } |
| 328 | } |
| 329 | |
| 330 | /* |
| 331 | * Switch kernel/user addressing modes? |
| 332 | */ |
| 333 | static int __init early_parse_switch_amode(char *p) |
| 334 | { |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 335 | if (user_mode != SECONDARY_SPACE_MODE) |
| 336 | user_mode = PRIMARY_SPACE_MODE; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 337 | return 0; |
| 338 | } |
| 339 | early_param("switch_amode", early_parse_switch_amode); |
| 340 | |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 341 | static int __init early_parse_user_mode(char *p) |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 342 | { |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 343 | if (p && strcmp(p, "primary") == 0) |
| 344 | user_mode = PRIMARY_SPACE_MODE; |
| 345 | #ifdef CONFIG_S390_EXEC_PROTECT |
| 346 | else if (p && strcmp(p, "secondary") == 0) |
| 347 | user_mode = SECONDARY_SPACE_MODE; |
| 348 | #endif |
| 349 | else if (!p || strcmp(p, "home") == 0) |
| 350 | user_mode = HOME_SPACE_MODE; |
| 351 | else |
| 352 | return 1; |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 353 | return 0; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 354 | } |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 355 | early_param("user_mode", early_parse_user_mode); |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 356 | |
| 357 | #ifdef CONFIG_S390_EXEC_PROTECT |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 358 | /* |
| 359 | * Enable execute protection? |
| 360 | */ |
| 361 | static int __init early_parse_noexec(char *p) |
| 362 | { |
| 363 | if (!strncmp(p, "off", 3)) |
| 364 | return 0; |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 365 | user_mode = SECONDARY_SPACE_MODE; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 366 | return 0; |
| 367 | } |
| 368 | early_param("noexec", early_parse_noexec); |
| 369 | #endif /* CONFIG_S390_EXEC_PROTECT */ |
| 370 | |
| 371 | static void setup_addressing_mode(void) |
| 372 | { |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 373 | if (user_mode == SECONDARY_SPACE_MODE) { |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 374 | if (set_amode_and_uaccess(PSW_ASC_SECONDARY, |
| 375 | PSW32_ASC_SECONDARY)) |
| 376 | pr_info("Execute protection active, " |
| 377 | "mvcos available\n"); |
| 378 | else |
| 379 | pr_info("Execute protection active, " |
| 380 | "mvcos not available\n"); |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 381 | } else if (user_mode == PRIMARY_SPACE_MODE) { |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 382 | if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY)) |
| 383 | pr_info("Address spaces switched, " |
| 384 | "mvcos available\n"); |
| 385 | else |
| 386 | pr_info("Address spaces switched, " |
| 387 | "mvcos not available\n"); |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 388 | } |
Heiko Carstens | 411788e | 2007-11-20 11:13:32 +0100 | [diff] [blame] | 389 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 390 | sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
| 391 | io_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
| 392 | #endif |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 393 | } |
| 394 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 395 | static void __init |
| 396 | setup_lowcore(void) |
| 397 | { |
| 398 | struct _lowcore *lc; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 399 | |
| 400 | /* |
| 401 | * Setup lowcore for boot cpu |
| 402 | */ |
Heiko Carstens | cbb870c | 2010-02-26 22:37:43 +0100 | [diff] [blame] | 403 | BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
Heiko Carstens | a087865 | 2010-03-24 11:49:51 +0100 | [diff] [blame^] | 404 | lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 405 | lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | lc->restart_psw.addr = |
| 407 | PSW_ADDR_AMODE | (unsigned long) restart_int_handler; |
Martin Schwidefsky | b11b533 | 2009-12-07 12:51:43 +0100 | [diff] [blame] | 408 | if (user_mode != HOME_SPACE_MODE) |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 409 | lc->restart_psw.mask |= PSW_ASC_HOME; |
| 410 | lc->external_new_psw.mask = psw_kernel_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | lc->external_new_psw.addr = |
| 412 | PSW_ADDR_AMODE | (unsigned long) ext_int_handler; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 413 | 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] | 414 | lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 415 | lc->program_new_psw.mask = psw_kernel_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | lc->program_new_psw.addr = |
| 417 | PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 418 | lc->mcck_new_psw.mask = |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 419 | psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | lc->mcck_new_psw.addr = |
| 421 | PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 422 | lc->io_new_psw.mask = psw_kernel_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
Heiko Carstens | 5a62b19 | 2008-04-17 07:46:25 +0200 | [diff] [blame] | 424 | lc->clock_comparator = -1ULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; |
| 426 | lc->async_stack = (unsigned long) |
| 427 | __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | lc->panic_stack = (unsigned long) |
| 429 | __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | lc->current_task = (unsigned long) init_thread_union.thread_info.task; |
| 431 | lc->thread_info = (unsigned long) &init_thread_union; |
Christian Ehrhardt | 25097bf | 2009-04-14 15:36:16 +0200 | [diff] [blame] | 432 | lc->machine_flags = S390_lowcore.machine_flags; |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 433 | #ifndef CONFIG_64BIT |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 434 | if (MACHINE_HAS_IEEE) { |
| 435 | lc->extended_save_area_addr = (__u32) |
Heiko Carstens | a087865 | 2010-03-24 11:49:51 +0100 | [diff] [blame^] | 436 | __alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 437 | /* enable extended save area */ |
Heiko Carstens | c4972f3 | 2006-11-06 10:49:02 +0100 | [diff] [blame] | 438 | __ctl_set_bit(14, 29); |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 439 | } |
Martin Schwidefsky | c742b31 | 2008-12-31 15:11:42 +0100 | [diff] [blame] | 440 | #else |
| 441 | lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 442 | #endif |
Martin Schwidefsky | ab96e79 | 2009-04-14 15:36:29 +0200 | [diff] [blame] | 443 | lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
| 444 | lc->async_enter_timer = S390_lowcore.async_enter_timer; |
| 445 | lc->exit_timer = S390_lowcore.exit_timer; |
| 446 | lc->user_timer = S390_lowcore.user_timer; |
| 447 | lc->system_timer = S390_lowcore.system_timer; |
| 448 | lc->steal_timer = S390_lowcore.steal_timer; |
| 449 | lc->last_update_timer = S390_lowcore.last_update_timer; |
| 450 | lc->last_update_clock = S390_lowcore.last_update_clock; |
Heiko Carstens | dfd9f7a | 2009-06-12 10:26:44 +0200 | [diff] [blame] | 451 | lc->ftrace_func = S390_lowcore.ftrace_func; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | set_prefix((u32)(unsigned long) lc); |
Frank Munzert | 099b765 | 2009-03-26 15:23:43 +0100 | [diff] [blame] | 453 | lowcore_ptr[0] = lc; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | static void __init |
| 457 | setup_resources(void) |
| 458 | { |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 459 | struct resource *res, *sub_res; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 460 | int i; |
| 461 | |
Heiko Carstens | cc13ad6 | 2006-06-25 05:49:30 -0700 | [diff] [blame] | 462 | code_resource.start = (unsigned long) &_text; |
| 463 | code_resource.end = (unsigned long) &_etext - 1; |
| 464 | data_resource.start = (unsigned long) &_etext; |
| 465 | data_resource.end = (unsigned long) &_edata - 1; |
| 466 | |
Heiko Carstens | 9f4b0ba | 2008-01-26 14:11:02 +0100 | [diff] [blame] | 467 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
| 468 | if (!memory_chunk[i].size) |
| 469 | continue; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 470 | res = alloc_bootmem_low(sizeof(struct resource)); |
| 471 | res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
| 472 | switch (memory_chunk[i].type) { |
| 473 | case CHUNK_READ_WRITE: |
| 474 | res->name = "System RAM"; |
| 475 | break; |
| 476 | case CHUNK_READ_ONLY: |
| 477 | res->name = "System ROM"; |
| 478 | res->flags |= IORESOURCE_READONLY; |
| 479 | break; |
| 480 | default: |
| 481 | res->name = "reserved"; |
| 482 | } |
| 483 | res->start = memory_chunk[i].addr; |
| 484 | res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; |
| 485 | request_resource(&iomem_resource, res); |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 486 | |
| 487 | if (code_resource.start >= res->start && |
| 488 | code_resource.start <= res->end && |
| 489 | code_resource.end > res->end) { |
| 490 | sub_res = alloc_bootmem_low(sizeof(struct resource)); |
| 491 | memcpy(sub_res, &code_resource, |
| 492 | sizeof(struct resource)); |
| 493 | sub_res->end = res->end; |
| 494 | code_resource.start = res->end + 1; |
| 495 | request_resource(res, sub_res); |
| 496 | } |
| 497 | |
| 498 | if (code_resource.start >= res->start && |
| 499 | code_resource.start <= res->end && |
| 500 | code_resource.end <= res->end) |
| 501 | request_resource(res, &code_resource); |
| 502 | |
| 503 | if (data_resource.start >= res->start && |
| 504 | data_resource.start <= res->end && |
| 505 | data_resource.end > res->end) { |
| 506 | sub_res = alloc_bootmem_low(sizeof(struct resource)); |
| 507 | memcpy(sub_res, &data_resource, |
| 508 | sizeof(struct resource)); |
| 509 | sub_res->end = res->end; |
| 510 | data_resource.start = res->end + 1; |
| 511 | request_resource(res, sub_res); |
| 512 | } |
| 513 | |
| 514 | if (data_resource.start >= res->start && |
| 515 | data_resource.start <= res->end && |
| 516 | data_resource.end <= res->end) |
| 517 | request_resource(res, &data_resource); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 518 | } |
| 519 | } |
| 520 | |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 521 | unsigned long real_memory_size; |
| 522 | EXPORT_SYMBOL_GPL(real_memory_size); |
| 523 | |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 524 | static void __init setup_memory_end(void) |
| 525 | { |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 526 | unsigned long memory_size; |
Christian Borntraeger | 5fd9c6e | 2008-01-26 14:11:00 +0100 | [diff] [blame] | 527 | unsigned long max_mem; |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 528 | int i; |
| 529 | |
Michael Holzheu | 59f2e69 | 2009-03-26 15:24:46 +0100 | [diff] [blame] | 530 | #ifdef CONFIG_ZFCPDUMP |
Heiko Carstens | 23d75d9 | 2009-02-19 15:19:01 +0100 | [diff] [blame] | 531 | if (ipl_info.type == IPL_TYPE_FCP_DUMP) { |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 532 | memory_end = ZFCPDUMP_HSA_SIZE; |
Heiko Carstens | 23d75d9 | 2009-02-19 15:19:01 +0100 | [diff] [blame] | 533 | memory_end_set = 1; |
| 534 | } |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 535 | #endif |
| 536 | memory_size = 0; |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 537 | memory_end &= PAGE_MASK; |
| 538 | |
Heiko Carstens | 0189103 | 2008-02-05 16:50:49 +0100 | [diff] [blame] | 539 | 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] | 540 | memory_end = min(max_mem, memory_end); |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 541 | |
Heiko Carstens | 9f4b0ba | 2008-01-26 14:11:02 +0100 | [diff] [blame] | 542 | /* |
| 543 | * Make sure all chunks are MAX_ORDER aligned so we don't need the |
| 544 | * extra checks that HOLES_IN_ZONE would require. |
| 545 | */ |
| 546 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
| 547 | unsigned long start, end; |
| 548 | struct mem_chunk *chunk; |
| 549 | unsigned long align; |
| 550 | |
| 551 | chunk = &memory_chunk[i]; |
| 552 | align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); |
| 553 | start = (chunk->addr + align - 1) & ~(align - 1); |
| 554 | end = (chunk->addr + chunk->size) & ~(align - 1); |
| 555 | if (start >= end) |
| 556 | memset(chunk, 0, sizeof(*chunk)); |
| 557 | else { |
| 558 | chunk->addr = start; |
| 559 | chunk->size = end - start; |
| 560 | } |
| 561 | } |
| 562 | |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 563 | for (i = 0; i < MEMORY_CHUNKS; i++) { |
| 564 | struct mem_chunk *chunk = &memory_chunk[i]; |
| 565 | |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 566 | real_memory_size = max(real_memory_size, |
| 567 | chunk->addr + chunk->size); |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 568 | if (chunk->addr >= max_mem) { |
| 569 | memset(chunk, 0, sizeof(*chunk)); |
| 570 | continue; |
| 571 | } |
| 572 | if (chunk->addr + chunk->size > max_mem) |
| 573 | chunk->size = max_mem - chunk->addr; |
| 574 | memory_size = max(memory_size, chunk->addr + chunk->size); |
| 575 | } |
| 576 | if (!memory_end) |
| 577 | memory_end = memory_size; |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 578 | } |
| 579 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 580 | static void __init |
| 581 | setup_memory(void) |
| 582 | { |
| 583 | unsigned long bootmap_size; |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 584 | unsigned long start_pfn, end_pfn; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 585 | int i; |
| 586 | |
| 587 | /* |
| 588 | * partially used pages are not usable - thus |
| 589 | * we are rounding upwards: |
| 590 | */ |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 591 | start_pfn = PFN_UP(__pa(&_end)); |
| 592 | end_pfn = max_pfn = PFN_DOWN(memory_end); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 593 | |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 594 | #ifdef CONFIG_BLK_DEV_INITRD |
| 595 | /* |
| 596 | * Move the initrd in case the bitmap of the bootmem allocater |
| 597 | * would overwrite it. |
| 598 | */ |
| 599 | |
| 600 | if (INITRD_START && INITRD_SIZE) { |
| 601 | unsigned long bmap_size; |
| 602 | unsigned long start; |
| 603 | |
| 604 | bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); |
| 605 | bmap_size = PFN_PHYS(bmap_size); |
| 606 | |
| 607 | if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { |
| 608 | start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; |
| 609 | |
| 610 | if (start + INITRD_SIZE > memory_end) { |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 611 | pr_err("initrd extends beyond end of " |
| 612 | "memory (0x%08lx > 0x%08lx) " |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 613 | "disabling initrd\n", |
| 614 | start + INITRD_SIZE, memory_end); |
| 615 | INITRD_START = INITRD_SIZE = 0; |
| 616 | } else { |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 617 | pr_info("Moving initrd (0x%08lx -> " |
| 618 | "0x%08lx, size: %ld)\n", |
| 619 | INITRD_START, start, INITRD_SIZE); |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 620 | memmove((void *) start, (void *) INITRD_START, |
| 621 | INITRD_SIZE); |
| 622 | INITRD_START = start; |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | #endif |
| 627 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 628 | /* |
Heiko Carstens | 7676bef | 2006-10-04 20:02:19 +0200 | [diff] [blame] | 629 | * Initialize the boot-time allocator |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 630 | */ |
| 631 | bootmap_size = init_bootmem(start_pfn, end_pfn); |
| 632 | |
| 633 | /* |
| 634 | * Register RAM areas with the bootmem allocator. |
| 635 | */ |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 636 | |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 637 | for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 638 | unsigned long start_chunk, end_chunk, pfn; |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 639 | |
| 640 | if (memory_chunk[i].type != CHUNK_READ_WRITE) |
| 641 | continue; |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 642 | start_chunk = PFN_DOWN(memory_chunk[i].addr); |
Gerald Schaefer | fb2e7c5 | 2008-11-14 18:18:00 +0100 | [diff] [blame] | 643 | end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 644 | end_chunk = min(end_chunk, end_pfn); |
| 645 | if (start_chunk >= end_chunk) |
| 646 | continue; |
| 647 | add_active_range(0, start_chunk, end_chunk); |
| 648 | pfn = max(start_chunk, start_pfn); |
Gerald Schaefer | fb2e7c5 | 2008-11-14 18:18:00 +0100 | [diff] [blame] | 649 | for (; pfn < end_chunk; pfn++) |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 650 | page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 651 | } |
| 652 | |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 653 | psw_set_key(PAGE_DEFAULT_KEY); |
| 654 | |
Heiko Carstens | 39b742f | 2006-12-08 15:56:10 +0100 | [diff] [blame] | 655 | free_bootmem_with_active_regions(0, max_pfn); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 656 | |
| 657 | /* |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 658 | * Reserve memory used for lowcore/command line/kernel image. |
| 659 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 660 | reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 661 | reserve_bootmem((unsigned long)_stext, |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 662 | PFN_PHYS(start_pfn) - (unsigned long)_stext, |
| 663 | BOOTMEM_DEFAULT); |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 664 | /* |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 665 | * Reserve the bootmem bitmap itself as well. We do this in two |
| 666 | * steps (first step was init_bootmem()) because this catches |
| 667 | * the (very unlikely) case of us accidentally initializing the |
| 668 | * bootmem allocator with an invalid RAM area. |
| 669 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 670 | reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, |
| 671 | BOOTMEM_DEFAULT); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 672 | |
| 673 | #ifdef CONFIG_BLK_DEV_INITRD |
Heiko Carstens | 65912a8 | 2006-09-20 15:58:41 +0200 | [diff] [blame] | 674 | if (INITRD_START && INITRD_SIZE) { |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 675 | if (INITRD_START + INITRD_SIZE <= memory_end) { |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 676 | reserve_bootmem(INITRD_START, INITRD_SIZE, |
| 677 | BOOTMEM_DEFAULT); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 678 | initrd_start = INITRD_START; |
| 679 | initrd_end = initrd_start + INITRD_SIZE; |
| 680 | } else { |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 681 | pr_err("initrd extends beyond end of " |
| 682 | "memory (0x%08lx > 0x%08lx) " |
| 683 | "disabling initrd\n", |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 684 | initrd_start + INITRD_SIZE, memory_end); |
| 685 | initrd_start = initrd_end = 0; |
| 686 | } |
| 687 | } |
| 688 | #endif |
| 689 | } |
| 690 | |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 691 | /* |
| 692 | * Setup hardware capabilities. |
| 693 | */ |
| 694 | static void __init setup_hwcaps(void) |
| 695 | { |
| 696 | static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 697 | unsigned long long facility_list_extended; |
| 698 | unsigned int facility_list; |
| 699 | int i; |
| 700 | |
| 701 | facility_list = stfl(); |
| 702 | /* |
| 703 | * The store facility list bits numbers as found in the principles |
| 704 | * of operation are numbered with bit 1UL<<31 as number 0 to |
| 705 | * bit 1UL<<0 as number 31. |
| 706 | * Bit 0: instructions named N3, "backported" to esa-mode |
| 707 | * Bit 2: z/Architecture mode is active |
| 708 | * Bit 7: the store-facility-list-extended facility is installed |
| 709 | * Bit 17: the message-security assist is installed |
| 710 | * Bit 19: the long-displacement facility is installed |
| 711 | * Bit 21: the extended-immediate facility is installed |
Andreas Krebbel | 488253c | 2009-03-26 15:24:56 +0100 | [diff] [blame] | 712 | * Bit 22: extended-translation facility 3 is installed |
| 713 | * Bit 30: extended-translation facility 3 enhancement facility |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 714 | * These get translated to: |
| 715 | * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, |
| 716 | * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, |
Andreas Krebbel | 488253c | 2009-03-26 15:24:56 +0100 | [diff] [blame] | 717 | * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and |
| 718 | * HWCAP_S390_ETF3EH bit 8 (22 && 30). |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 719 | */ |
| 720 | for (i = 0; i < 6; i++) |
| 721 | if (facility_list & (1UL << (31 - stfl_bits[i]))) |
| 722 | elf_hwcap |= 1UL << i; |
| 723 | |
Andreas Krebbel | 488253c | 2009-03-26 15:24:56 +0100 | [diff] [blame] | 724 | if ((facility_list & (1UL << (31 - 22))) |
| 725 | && (facility_list & (1UL << (31 - 30)))) |
Heiko Carstens | ea2a4d3 | 2009-10-06 10:34:13 +0200 | [diff] [blame] | 726 | elf_hwcap |= HWCAP_S390_ETF3EH; |
Andreas Krebbel | 488253c | 2009-03-26 15:24:56 +0100 | [diff] [blame] | 727 | |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 728 | /* |
| 729 | * Check for additional facilities with store-facility-list-extended. |
| 730 | * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 |
| 731 | * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information |
| 732 | * as stored by stfl, bits 32-xxx contain additional facilities. |
| 733 | * How many facility words are stored depends on the number of |
| 734 | * doublewords passed to the instruction. The additional facilites |
| 735 | * are: |
Christian Ehrhardt | 2ac3307 | 2009-03-26 15:24:54 +0100 | [diff] [blame] | 736 | * Bit 42: decimal floating point facility is installed |
| 737 | * Bit 44: perform floating point operation facility is installed |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 738 | * translated to: |
Andreas Krebbel | 488253c | 2009-03-26 15:24:56 +0100 | [diff] [blame] | 739 | * HWCAP_S390_DFP bit 6 (42 && 44). |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 740 | */ |
| 741 | if ((elf_hwcap & (1UL << 2)) && |
Heiko Carstens | 7b758389 | 2008-04-17 07:46:11 +0200 | [diff] [blame] | 742 | __stfle(&facility_list_extended, 1) > 0) { |
Christian Ehrhardt | 2ac3307 | 2009-03-26 15:24:54 +0100 | [diff] [blame] | 743 | if ((facility_list_extended & (1ULL << (63 - 42))) |
Andreas Krebbel | 488253c | 2009-03-26 15:24:56 +0100 | [diff] [blame] | 744 | && (facility_list_extended & (1ULL << (63 - 44)))) |
Heiko Carstens | ea2a4d3 | 2009-10-06 10:34:13 +0200 | [diff] [blame] | 745 | elf_hwcap |= HWCAP_S390_DFP; |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 746 | } |
| 747 | |
Heiko Carstens | ea2a4d3 | 2009-10-06 10:34:13 +0200 | [diff] [blame] | 748 | /* |
| 749 | * Huge page support HWCAP_S390_HPAGE is bit 7. |
| 750 | */ |
Gerald Schaefer | 53492b1 | 2008-04-30 13:38:46 +0200 | [diff] [blame] | 751 | if (MACHINE_HAS_HPAGE) |
Heiko Carstens | ea2a4d3 | 2009-10-06 10:34:13 +0200 | [diff] [blame] | 752 | elf_hwcap |= HWCAP_S390_HPAGE; |
| 753 | |
| 754 | /* |
| 755 | * 64-bit register support for 31-bit processes |
| 756 | * HWCAP_S390_HIGH_GPRS is bit 9. |
| 757 | */ |
| 758 | elf_hwcap |= HWCAP_S390_HIGH_GPRS; |
Gerald Schaefer | 53492b1 | 2008-04-30 13:38:46 +0200 | [diff] [blame] | 759 | |
Martin Schwidefsky | 7b46848 | 2009-03-26 15:24:42 +0100 | [diff] [blame] | 760 | switch (S390_lowcore.cpu_id.machine) { |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 761 | case 0x9672: |
| 762 | #if !defined(CONFIG_64BIT) |
| 763 | default: /* Use "g5" as default for 31 bit kernels. */ |
| 764 | #endif |
| 765 | strcpy(elf_platform, "g5"); |
| 766 | break; |
| 767 | case 0x2064: |
| 768 | case 0x2066: |
| 769 | #if defined(CONFIG_64BIT) |
| 770 | default: /* Use "z900" as default for 64 bit kernels. */ |
| 771 | #endif |
| 772 | strcpy(elf_platform, "z900"); |
| 773 | break; |
| 774 | case 0x2084: |
| 775 | case 0x2086: |
| 776 | strcpy(elf_platform, "z990"); |
| 777 | break; |
| 778 | case 0x2094: |
Martin Schwidefsky | 9fee8db | 2008-12-25 13:39:22 +0100 | [diff] [blame] | 779 | case 0x2096: |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 780 | strcpy(elf_platform, "z9-109"); |
| 781 | break; |
Martin Schwidefsky | 9fee8db | 2008-12-25 13:39:22 +0100 | [diff] [blame] | 782 | case 0x2097: |
| 783 | case 0x2098: |
| 784 | strcpy(elf_platform, "z10"); |
| 785 | break; |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 786 | } |
| 787 | } |
| 788 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 789 | /* |
| 790 | * Setup function called from init/main.c just after the banner |
| 791 | * was printed. |
| 792 | */ |
| 793 | |
| 794 | void __init |
| 795 | setup_arch(char **cmdline_p) |
| 796 | { |
| 797 | /* |
| 798 | * print what head.S has found out about the machine |
| 799 | */ |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 800 | #ifndef CONFIG_64BIT |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 801 | if (MACHINE_IS_VM) |
| 802 | pr_info("Linux is running as a z/VM " |
| 803 | "guest operating system in 31-bit mode\n"); |
Martin Schwidefsky | 27d7160 | 2010-02-26 22:37:38 +0100 | [diff] [blame] | 804 | else if (MACHINE_IS_LPAR) |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 805 | pr_info("Linux is running natively in 31-bit mode\n"); |
| 806 | if (MACHINE_HAS_IEEE) |
| 807 | pr_info("The hardware system has IEEE compatible " |
| 808 | "floating point units\n"); |
| 809 | else |
| 810 | pr_info("The hardware system has no IEEE compatible " |
| 811 | "floating point units\n"); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 812 | #else /* CONFIG_64BIT */ |
Carsten Otte | fa58774 | 2008-03-25 18:47:44 +0100 | [diff] [blame] | 813 | if (MACHINE_IS_VM) |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 814 | pr_info("Linux is running as a z/VM " |
| 815 | "guest operating system in 64-bit mode\n"); |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 816 | else if (MACHINE_IS_KVM) |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 817 | pr_info("Linux is running under KVM in 64-bit mode\n"); |
Martin Schwidefsky | 27d7160 | 2010-02-26 22:37:38 +0100 | [diff] [blame] | 818 | else if (MACHINE_IS_LPAR) |
Martin Schwidefsky | 3b6ed4a | 2008-12-25 13:39:40 +0100 | [diff] [blame] | 819 | pr_info("Linux is running natively in 64-bit mode\n"); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 820 | #endif /* CONFIG_64BIT */ |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 821 | |
Hendrik Brueckner | a0443fb | 2008-07-14 09:59:09 +0200 | [diff] [blame] | 822 | /* Have one command line that is parsed and saved in /proc/cmdline */ |
| 823 | /* boot_command_line has been already set up in early.c */ |
| 824 | *cmdline_p = boot_command_line; |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 825 | |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 826 | ROOT_DEV = Root_RAM0; |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 827 | |
| 828 | init_mm.start_code = PAGE_OFFSET; |
| 829 | init_mm.end_code = (unsigned long) &_etext; |
| 830 | init_mm.end_data = (unsigned long) &_edata; |
| 831 | init_mm.brk = (unsigned long) &_end; |
| 832 | |
Gerald Schaefer | 6c2a9e6 | 2006-09-20 15:59:44 +0200 | [diff] [blame] | 833 | if (MACHINE_HAS_MVCOS) |
| 834 | memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); |
| 835 | else |
| 836 | memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); |
| 837 | |
Heiko Carstens | 5968529 | 2006-03-24 03:15:15 -0800 | [diff] [blame] | 838 | parse_early_param(); |
| 839 | |
Michael Holzheu | 99ca4e5 | 2008-01-26 14:11:11 +0100 | [diff] [blame] | 840 | setup_ipl(); |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 841 | setup_memory_end(); |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 842 | setup_addressing_mode(); |
Heiko Carstens | c9e3735 | 2005-05-01 08:58:57 -0700 | [diff] [blame] | 843 | setup_memory(); |
| 844 | setup_resources(); |
| 845 | setup_lowcore(); |
| 846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | cpu_init(); |
Heiko Carstens | dbd70fb | 2008-04-17 07:46:12 +0200 | [diff] [blame] | 848 | s390_init_cpu_topology(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | /* |
Martin Schwidefsky | cf8ba7a | 2007-05-04 18:48:28 +0200 | [diff] [blame] | 851 | * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). |
| 852 | */ |
| 853 | setup_hwcaps(); |
| 854 | |
| 855 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | * Create kernel page tables and switch to virtual addressing. |
| 857 | */ |
| 858 | paging_init(); |
| 859 | |
| 860 | /* Setup default console */ |
| 861 | conmode_default(); |
Hendrik Brueckner | 637952c | 2009-08-23 18:09:06 +0200 | [diff] [blame] | 862 | set_preferred_console(); |
Michael Holzheu | 411ed32 | 2007-04-27 16:01:49 +0200 | [diff] [blame] | 863 | |
| 864 | /* Setup zfcpdump support */ |
| 865 | setup_zfcpdump(console_devno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | } |