1ab14de6cSHeiko Carstens /* 2155af2f9SHans-Joachim Picht * Copyright IBM Corp. 2007, 2009 3ab14de6cSHeiko Carstens * Author(s): Hongjie Yang <hongjie@us.ibm.com>, 4ab14de6cSHeiko Carstens * Heiko Carstens <heiko.carstens@de.ibm.com> 5ab14de6cSHeiko Carstens */ 6ab14de6cSHeiko Carstens 711af97e1SHendrik Brueckner #define KMSG_COMPONENT "setup" 811af97e1SHendrik Brueckner #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 911af97e1SHendrik Brueckner 1092e6ecf3SChristian Borntraeger #include <linux/compiler.h> 11ab14de6cSHeiko Carstens #include <linux/init.h> 12ab14de6cSHeiko Carstens #include <linux/errno.h> 13ab14de6cSHeiko Carstens #include <linux/string.h> 14ab14de6cSHeiko Carstens #include <linux/ctype.h> 15ab14de6cSHeiko Carstens #include <linux/lockdep.h> 16ab14de6cSHeiko Carstens #include <linux/module.h> 17ab14de6cSHeiko Carstens #include <linux/pfn.h> 18ab14de6cSHeiko Carstens #include <linux/uaccess.h> 1911af97e1SHendrik Brueckner #include <linux/kernel.h> 20a0443fbbSHendrik Brueckner #include <asm/ebcdic.h> 2146b05d26SMichael Holzheu #include <asm/ipl.h> 22ab14de6cSHeiko Carstens #include <asm/lowcore.h> 23ab14de6cSHeiko Carstens #include <asm/processor.h> 24ab14de6cSHeiko Carstens #include <asm/sections.h> 25ab14de6cSHeiko Carstens #include <asm/setup.h> 2692e6ecf3SChristian Borntraeger #include <asm/sysinfo.h> 27ab14de6cSHeiko Carstens #include <asm/cpcmd.h> 28ab14de6cSHeiko Carstens #include <asm/sclp.h> 29a0616cdeSDavid Howells #include <asm/facility.h> 30a806170eSHeiko Carstens #include "entry.h" 31ab14de6cSHeiko Carstens 32ab14de6cSHeiko Carstens /* 33ab14de6cSHeiko Carstens * Create a Kernel NSS if the SAVESYS= parameter is defined 34ab14de6cSHeiko Carstens */ 35a0443fbbSHendrik Brueckner #define DEFSYS_CMD_SIZE 128 36ab14de6cSHeiko Carstens #define SAVESYS_CMD_SIZE 32 37ab14de6cSHeiko Carstens 38ab14de6cSHeiko Carstens char kernel_nss_name[NSS_NAME_SIZE + 1]; 39ab14de6cSHeiko Carstens 40a0443fbbSHendrik Brueckner static void __init setup_boot_command_line(void); 41a0443fbbSHendrik Brueckner 42b6112ccbSMartin Schwidefsky /* 43b6112ccbSMartin Schwidefsky * Get the TOD clock running. 44b6112ccbSMartin Schwidefsky */ 45b6112ccbSMartin Schwidefsky static void __init reset_tod_clock(void) 46b6112ccbSMartin Schwidefsky { 47b6112ccbSMartin Schwidefsky u64 time; 48b6112ccbSMartin Schwidefsky 491aae0560SHeiko Carstens if (store_tod_clock(&time) == 0) 50b6112ccbSMartin Schwidefsky return; 51b6112ccbSMartin Schwidefsky /* TOD clock not running. Set the clock to Unix Epoch. */ 521aae0560SHeiko Carstens if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0) 53b6112ccbSMartin Schwidefsky disabled_wait(0); 54b6112ccbSMartin Schwidefsky 55b6112ccbSMartin Schwidefsky sched_clock_base_cc = TOD_UNIX_EPOCH; 56b89031e0SMartin Schwidefsky S390_lowcore.last_update_clock = sched_clock_base_cc; 57b6112ccbSMartin Schwidefsky } 58a0443fbbSHendrik Brueckner 59ab14de6cSHeiko Carstens #ifdef CONFIG_SHARED_KERNEL 60a0443fbbSHendrik Brueckner int __init savesys_ipl_nss(char *cmd, const int cmdlen); 61a0443fbbSHendrik Brueckner 62a0443fbbSHendrik Brueckner asm( 63a0443fbbSHendrik Brueckner " .section .init.text,\"ax\",@progbits\n" 64a0443fbbSHendrik Brueckner " .align 4\n" 65a0443fbbSHendrik Brueckner " .type savesys_ipl_nss, @function\n" 66a0443fbbSHendrik Brueckner "savesys_ipl_nss:\n" 67a0443fbbSHendrik Brueckner #ifdef CONFIG_64BIT 68a0443fbbSHendrik Brueckner " stmg 6,15,48(15)\n" 69a0443fbbSHendrik Brueckner " lgr 14,3\n" 70a0443fbbSHendrik Brueckner " sam31\n" 71a0443fbbSHendrik Brueckner " diag 2,14,0x8\n" 72a0443fbbSHendrik Brueckner " sam64\n" 73a0443fbbSHendrik Brueckner " lgr 2,14\n" 74a0443fbbSHendrik Brueckner " lmg 6,15,48(15)\n" 75a0443fbbSHendrik Brueckner #else 76a0443fbbSHendrik Brueckner " stm 6,15,24(15)\n" 77a0443fbbSHendrik Brueckner " lr 14,3\n" 78a0443fbbSHendrik Brueckner " diag 2,14,0x8\n" 79a0443fbbSHendrik Brueckner " lr 2,14\n" 80a0443fbbSHendrik Brueckner " lm 6,15,24(15)\n" 81a0443fbbSHendrik Brueckner #endif 82a0443fbbSHendrik Brueckner " br 14\n" 8318764463SHeiko Carstens " .size savesys_ipl_nss, .-savesys_ipl_nss\n" 8418764463SHeiko Carstens " .previous\n"); 85a0443fbbSHendrik Brueckner 86684d2fd4SHendrik Brueckner static __initdata char upper_command_line[COMMAND_LINE_SIZE]; 87684d2fd4SHendrik Brueckner 88ab14de6cSHeiko Carstens static noinline __init void create_kernel_nss(void) 89ab14de6cSHeiko Carstens { 90ab14de6cSHeiko Carstens unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size; 91ab14de6cSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 92ab14de6cSHeiko Carstens unsigned int sinitrd_pfn, einitrd_pfn; 93ab14de6cSHeiko Carstens #endif 94ab14de6cSHeiko Carstens int response; 9569ac43b0SChen Liu int hlen; 96a0443fbbSHendrik Brueckner size_t len; 97ab14de6cSHeiko Carstens char *savesys_ptr; 98ab14de6cSHeiko Carstens char defsys_cmd[DEFSYS_CMD_SIZE]; 99ab14de6cSHeiko Carstens char savesys_cmd[SAVESYS_CMD_SIZE]; 100ab14de6cSHeiko Carstens 101ab14de6cSHeiko Carstens /* Do nothing if we are not running under VM */ 102ab14de6cSHeiko Carstens if (!MACHINE_IS_VM) 103ab14de6cSHeiko Carstens return; 104ab14de6cSHeiko Carstens 105ab14de6cSHeiko Carstens /* Convert COMMAND_LINE to upper case */ 106a0443fbbSHendrik Brueckner for (i = 0; i < strlen(boot_command_line); i++) 107a0443fbbSHendrik Brueckner upper_command_line[i] = toupper(boot_command_line[i]); 108ab14de6cSHeiko Carstens 109ab14de6cSHeiko Carstens savesys_ptr = strstr(upper_command_line, "SAVESYS="); 110ab14de6cSHeiko Carstens 111ab14de6cSHeiko Carstens if (!savesys_ptr) 112ab14de6cSHeiko Carstens return; 113ab14de6cSHeiko Carstens 114ab14de6cSHeiko Carstens savesys_ptr += 8; /* Point to the beginning of the NSS name */ 115ab14de6cSHeiko Carstens for (i = 0; i < NSS_NAME_SIZE; i++) { 116ab14de6cSHeiko Carstens if (savesys_ptr[i] == ' ' || savesys_ptr[i] == '\0') 117ab14de6cSHeiko Carstens break; 118ab14de6cSHeiko Carstens kernel_nss_name[i] = savesys_ptr[i]; 119ab14de6cSHeiko Carstens } 120ab14de6cSHeiko Carstens 121ab14de6cSHeiko Carstens stext_pfn = PFN_DOWN(__pa(&_stext)); 122ab14de6cSHeiko Carstens eshared_pfn = PFN_DOWN(__pa(&_eshared)); 123ab14de6cSHeiko Carstens end_pfn = PFN_UP(__pa(&_end)); 124ab14de6cSHeiko Carstens min_size = end_pfn << 2; 125ab14de6cSHeiko Carstens 12669ac43b0SChen Liu hlen = snprintf(defsys_cmd, DEFSYS_CMD_SIZE, 12769ac43b0SChen Liu "DEFSYS %s 00000-%.5X EW %.5X-%.5X SR %.5X-%.5X", 12869ac43b0SChen Liu kernel_nss_name, stext_pfn - 1, stext_pfn, 12969ac43b0SChen Liu eshared_pfn - 1, eshared_pfn, end_pfn); 130ab14de6cSHeiko Carstens 131ab14de6cSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 132ab14de6cSHeiko Carstens if (INITRD_START && INITRD_SIZE) { 133ab14de6cSHeiko Carstens sinitrd_pfn = PFN_DOWN(__pa(INITRD_START)); 134ab14de6cSHeiko Carstens einitrd_pfn = PFN_UP(__pa(INITRD_START + INITRD_SIZE)); 135ab14de6cSHeiko Carstens min_size = einitrd_pfn << 2; 13669ac43b0SChen Liu hlen += snprintf(defsys_cmd + hlen, DEFSYS_CMD_SIZE - hlen, 13769ac43b0SChen Liu " EW %.5X-%.5X", sinitrd_pfn, einitrd_pfn); 138ab14de6cSHeiko Carstens } 139ab14de6cSHeiko Carstens #endif 140ab14de6cSHeiko Carstens 14169ac43b0SChen Liu snprintf(defsys_cmd + hlen, DEFSYS_CMD_SIZE - hlen, 14269ac43b0SChen Liu " EW MINSIZE=%.7iK PARMREGS=0-13", min_size); 14369ac43b0SChen Liu defsys_cmd[DEFSYS_CMD_SIZE - 1] = '\0'; 144894e491eSHeiko Carstens snprintf(savesys_cmd, SAVESYS_CMD_SIZE, "SAVESYS %s \n IPL %s", 145ab14de6cSHeiko Carstens kernel_nss_name, kernel_nss_name); 146894e491eSHeiko Carstens savesys_cmd[SAVESYS_CMD_SIZE - 1] = '\0'; 147ab14de6cSHeiko Carstens 148ab14de6cSHeiko Carstens __cpcmd(defsys_cmd, NULL, 0, &response); 149ab14de6cSHeiko Carstens 150583b33bcSHongjie Yang if (response != 0) { 15111af97e1SHendrik Brueckner pr_err("Defining the Linux kernel NSS failed with rc=%d\n", 15211af97e1SHendrik Brueckner response); 153583b33bcSHongjie Yang kernel_nss_name[0] = '\0'; 154ab14de6cSHeiko Carstens return; 155583b33bcSHongjie Yang } 156ab14de6cSHeiko Carstens 157a0443fbbSHendrik Brueckner len = strlen(savesys_cmd); 158a0443fbbSHendrik Brueckner ASCEBC(savesys_cmd, len); 159a0443fbbSHendrik Brueckner response = savesys_ipl_nss(savesys_cmd, len); 160ab14de6cSHeiko Carstens 161a0443fbbSHendrik Brueckner /* On success: response is equal to the command size, 162a0443fbbSHendrik Brueckner * max SAVESYS_CMD_SIZE 163a0443fbbSHendrik Brueckner * On error: response contains the numeric portion of cp error message. 164a0443fbbSHendrik Brueckner * for SAVESYS it will be >= 263 16511af97e1SHendrik Brueckner * for missing privilege class, it will be 1 166a0443fbbSHendrik Brueckner */ 16711af97e1SHendrik Brueckner if (response > SAVESYS_CMD_SIZE || response == 1) { 16811af97e1SHendrik Brueckner pr_err("Saving the Linux kernel NSS failed with rc=%d\n", 16911af97e1SHendrik Brueckner response); 170583b33bcSHongjie Yang kernel_nss_name[0] = '\0'; 171ab14de6cSHeiko Carstens return; 172583b33bcSHongjie Yang } 173ab14de6cSHeiko Carstens 174b89031e0SMartin Schwidefsky /* re-initialize cputime accounting. */ 1751aae0560SHeiko Carstens sched_clock_base_cc = get_tod_clock(); 176b89031e0SMartin Schwidefsky S390_lowcore.last_update_clock = sched_clock_base_cc; 177b89031e0SMartin Schwidefsky S390_lowcore.last_update_timer = 0x7fffffffffffffffULL; 178b89031e0SMartin Schwidefsky S390_lowcore.user_timer = 0; 179b89031e0SMartin Schwidefsky S390_lowcore.system_timer = 0; 180b89031e0SMartin Schwidefsky asm volatile("SPT 0(%0)" : : "a" (&S390_lowcore.last_update_timer)); 181b89031e0SMartin Schwidefsky 182a0443fbbSHendrik Brueckner /* re-setup boot command line with new ipl vm parms */ 183a0443fbbSHendrik Brueckner ipl_update_parameters(); 184a0443fbbSHendrik Brueckner setup_boot_command_line(); 185a0443fbbSHendrik Brueckner 186ab14de6cSHeiko Carstens ipl_flags = IPL_NSS_VALID; 187ab14de6cSHeiko Carstens } 188ab14de6cSHeiko Carstens 189ab14de6cSHeiko Carstens #else /* CONFIG_SHARED_KERNEL */ 190ab14de6cSHeiko Carstens 191ab14de6cSHeiko Carstens static inline void create_kernel_nss(void) { } 192ab14de6cSHeiko Carstens 193ab14de6cSHeiko Carstens #endif /* CONFIG_SHARED_KERNEL */ 194ab14de6cSHeiko Carstens 195ab14de6cSHeiko Carstens /* 196ab14de6cSHeiko Carstens * Clear bss memory 197ab14de6cSHeiko Carstens */ 198ab14de6cSHeiko Carstens static noinline __init void clear_bss_section(void) 199ab14de6cSHeiko Carstens { 200229d9c6dSHeiko Carstens memset(__bss_start, 0, __bss_stop - __bss_start); 201ab14de6cSHeiko Carstens } 202ab14de6cSHeiko Carstens 203ab14de6cSHeiko Carstens /* 204ab14de6cSHeiko Carstens * Initialize storage key for kernel pages 205ab14de6cSHeiko Carstens */ 206ab14de6cSHeiko Carstens static noinline __init void init_kernel_storage_key(void) 207ab14de6cSHeiko Carstens { 208127c1fefSMartin Schwidefsky #if PAGE_DEFAULT_KEY 209ab14de6cSHeiko Carstens unsigned long end_pfn, init_pfn; 210ab14de6cSHeiko Carstens 211ab14de6cSHeiko Carstens end_pfn = PFN_UP(__pa(&_end)); 212ab14de6cSHeiko Carstens 213ab14de6cSHeiko Carstens for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++) 214e2b8d7afSMartin Schwidefsky page_set_storage_key(init_pfn << PAGE_SHIFT, 215e2b8d7afSMartin Schwidefsky PAGE_DEFAULT_KEY, 0); 216127c1fefSMartin Schwidefsky #endif 217ab14de6cSHeiko Carstens } 218ab14de6cSHeiko Carstens 219fade4dc4SHeiko Carstens static __initdata char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE); 22092e6ecf3SChristian Borntraeger 221ab14de6cSHeiko Carstens static noinline __init void detect_machine_type(void) 222ab14de6cSHeiko Carstens { 223fade4dc4SHeiko Carstens struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page; 224fade4dc4SHeiko Carstens 22527d71602SMartin Schwidefsky /* Check current-configuration-level */ 226caf757c6SHeiko Carstens if (stsi(NULL, 0, 0, 0) <= 2) { 22727d71602SMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR; 22892e6ecf3SChristian Borntraeger return; 22927d71602SMartin Schwidefsky } 23027d71602SMartin Schwidefsky /* Get virtual-machine cpu information. */ 231caf757c6SHeiko Carstens if (stsi(vmms, 3, 2, 2) || !vmms->count) 23292e6ecf3SChristian Borntraeger return; 233ab14de6cSHeiko Carstens 23492e6ecf3SChristian Borntraeger /* Running under KVM? If not we assume z/VM */ 235fade4dc4SHeiko Carstens if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3)) 236d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_KVM; 23792e6ecf3SChristian Borntraeger else 238d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_VM; 239ab14de6cSHeiko Carstens } 240ab14de6cSHeiko Carstens 241fade4dc4SHeiko Carstens static __init void setup_topology(void) 242fade4dc4SHeiko Carstens { 243fade4dc4SHeiko Carstens #ifdef CONFIG_64BIT 244fade4dc4SHeiko Carstens int max_mnest; 245fade4dc4SHeiko Carstens 246fade4dc4SHeiko Carstens if (!test_facility(11)) 247fade4dc4SHeiko Carstens return; 248fade4dc4SHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY; 249fade4dc4SHeiko Carstens for (max_mnest = 6; max_mnest > 1; max_mnest--) { 250caf757c6SHeiko Carstens if (stsi(&sysinfo_page, 15, 1, max_mnest) == 0) 251fade4dc4SHeiko Carstens break; 252fade4dc4SHeiko Carstens } 253fade4dc4SHeiko Carstens topology_max_mnest = max_mnest; 254fade4dc4SHeiko Carstens #endif 255fade4dc4SHeiko Carstens } 256fade4dc4SHeiko Carstens 257a3415703SMichael Holzheu static void early_pgm_check_handler(void) 258ab14de6cSHeiko Carstens { 259ab14de6cSHeiko Carstens const struct exception_table_entry *fixup; 26050be6345SPhilipp Hachtmann unsigned long cr0, cr0_new; 261eb608fb3SHeiko Carstens unsigned long addr; 262ab14de6cSHeiko Carstens 263ab14de6cSHeiko Carstens addr = S390_lowcore.program_old_psw.addr; 264ab14de6cSHeiko Carstens fixup = search_exception_tables(addr & PSW_ADDR_INSN); 265ab14de6cSHeiko Carstens if (!fixup) 266ab14de6cSHeiko Carstens disabled_wait(0); 26750be6345SPhilipp Hachtmann /* Disable low address protection before storing into lowcore. */ 26850be6345SPhilipp Hachtmann __ctl_store(cr0, 0, 0); 26950be6345SPhilipp Hachtmann cr0_new = cr0 & ~(1UL << 28); 27050be6345SPhilipp Hachtmann __ctl_load(cr0_new, 0, 0); 271eb608fb3SHeiko Carstens S390_lowcore.program_old_psw.addr = extable_fixup(fixup)|PSW_ADDR_AMODE; 27250be6345SPhilipp Hachtmann __ctl_load(cr0, 0, 0); 273ab14de6cSHeiko Carstens } 274ab14de6cSHeiko Carstens 2755f954c34SHeiko Carstens static noinline __init void setup_lowcore_early(void) 276ab14de6cSHeiko Carstens { 277ab14de6cSHeiko Carstens psw_t psw; 278ab14de6cSHeiko Carstens 279b50511e4SMartin Schwidefsky psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA; 280ab14de6cSHeiko Carstens psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_ext_handler; 281ab14de6cSHeiko Carstens S390_lowcore.external_new_psw = psw; 282ab14de6cSHeiko Carstens psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 283ab14de6cSHeiko Carstens S390_lowcore.program_new_psw = psw; 284ab14de6cSHeiko Carstens s390_base_pgm_handler_fn = early_pgm_check_handler; 285ab14de6cSHeiko Carstens } 286ab14de6cSHeiko Carstens 28714375bc4SMartin Schwidefsky static noinline __init void setup_facility_list(void) 28814375bc4SMartin Schwidefsky { 2893ab121abSMichael Holzheu stfle(S390_lowcore.stfle_fac_list, 2903ab121abSMichael Holzheu ARRAY_SIZE(S390_lowcore.stfle_fac_list)); 29114375bc4SMartin Schwidefsky } 29214375bc4SMartin Schwidefsky 2932e5061e4SHeiko Carstens static __init void detect_mvpg(void) 2942e5061e4SHeiko Carstens { 2952e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 2962e5061e4SHeiko Carstens int rc; 2972e5061e4SHeiko Carstens 2982e5061e4SHeiko Carstens asm volatile( 2992e5061e4SHeiko Carstens " la 0,0\n" 3002e5061e4SHeiko Carstens " mvpg %2,%2\n" 3012e5061e4SHeiko Carstens "0: la %0,0\n" 3022e5061e4SHeiko Carstens "1:\n" 3032e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3042e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0"); 3052e5061e4SHeiko Carstens if (!rc) 306d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_MVPG; 3072e5061e4SHeiko Carstens #endif 3082e5061e4SHeiko Carstens } 3092e5061e4SHeiko Carstens 3102e5061e4SHeiko Carstens static __init void detect_ieee(void) 3112e5061e4SHeiko Carstens { 3122e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 3132e5061e4SHeiko Carstens int rc, tmp; 3142e5061e4SHeiko Carstens 3152e5061e4SHeiko Carstens asm volatile( 3162e5061e4SHeiko Carstens " efpc %1,0\n" 3172e5061e4SHeiko Carstens "0: la %0,0\n" 3182e5061e4SHeiko Carstens "1:\n" 3192e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3202e5061e4SHeiko Carstens : "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc"); 3212e5061e4SHeiko Carstens if (!rc) 322d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_IEEE; 3232e5061e4SHeiko Carstens #endif 3242e5061e4SHeiko Carstens } 3252e5061e4SHeiko Carstens 3262e5061e4SHeiko Carstens static __init void detect_csp(void) 3272e5061e4SHeiko Carstens { 3282e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 3292e5061e4SHeiko Carstens int rc; 3302e5061e4SHeiko Carstens 3312e5061e4SHeiko Carstens asm volatile( 3322e5061e4SHeiko Carstens " la 0,0\n" 3332e5061e4SHeiko Carstens " la 1,0\n" 3342e5061e4SHeiko Carstens " la 2,4\n" 3352e5061e4SHeiko Carstens " csp 0,2\n" 3362e5061e4SHeiko Carstens "0: la %0,0\n" 3372e5061e4SHeiko Carstens "1:\n" 3382e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3392e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2"); 3402e5061e4SHeiko Carstens if (!rc) 341d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_CSP; 3422e5061e4SHeiko Carstens #endif 3432e5061e4SHeiko Carstens } 3442e5061e4SHeiko Carstens 3452e5061e4SHeiko Carstens static __init void detect_diag9c(void) 3462e5061e4SHeiko Carstens { 3472e5061e4SHeiko Carstens unsigned int cpu_address; 3482e5061e4SHeiko Carstens int rc; 3492e5061e4SHeiko Carstens 3502e5061e4SHeiko Carstens cpu_address = stap(); 3512e5061e4SHeiko Carstens asm volatile( 3522e5061e4SHeiko Carstens " diag %2,0,0x9c\n" 3532e5061e4SHeiko Carstens "0: la %0,0\n" 3542e5061e4SHeiko Carstens "1:\n" 3552e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3562e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc"); 3572e5061e4SHeiko Carstens if (!rc) 358d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C; 3592e5061e4SHeiko Carstens } 3602e5061e4SHeiko Carstens 3612e5061e4SHeiko Carstens static __init void detect_diag44(void) 3622e5061e4SHeiko Carstens { 3632e5061e4SHeiko Carstens #ifdef CONFIG_64BIT 3642e5061e4SHeiko Carstens int rc; 3652e5061e4SHeiko Carstens 3662e5061e4SHeiko Carstens asm volatile( 3672e5061e4SHeiko Carstens " diag 0,0,0x44\n" 3682e5061e4SHeiko Carstens "0: la %0,0\n" 3692e5061e4SHeiko Carstens "1:\n" 3702e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3712e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc"); 3722e5061e4SHeiko Carstens if (!rc) 373d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG44; 3742e5061e4SHeiko Carstens #endif 3752e5061e4SHeiko Carstens } 3762e5061e4SHeiko Carstens 3772e5061e4SHeiko Carstens static __init void detect_machine_facilities(void) 3782e5061e4SHeiko Carstens { 3792e5061e4SHeiko Carstens #ifdef CONFIG_64BIT 3803c7ef08bSHeiko Carstens if (test_facility(8)) { 3813c7ef08bSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT1; 3823c7ef08bSHeiko Carstens __ctl_set_bit(0, 23); 3833c7ef08bSHeiko Carstens } 38485e9d0e5SHeiko Carstens if (test_facility(78)) 38585e9d0e5SHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2; 38614375bc4SMartin Schwidefsky if (test_facility(3)) 387d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE; 38814375bc4SMartin Schwidefsky if (test_facility(40)) 38923d18e8dSHendrik Brueckner S390_lowcore.machine_flags |= MACHINE_FLAG_LPP; 390d35339a4SMartin Schwidefsky if (test_facility(50) && test_facility(73)) 391d35339a4SMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_TE; 3921b948d6cSMartin Schwidefsky if (test_facility(51)) 3931b948d6cSMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC; 39480703617SMartin Schwidefsky if (test_facility(129)) 39580703617SMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_VX; 396*2c72a44eSMartin Schwidefsky if (test_facility(128)) 397*2c72a44eSMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_CAD; 3982e5061e4SHeiko Carstens #endif 3992e5061e4SHeiko Carstens } 4002e5061e4SHeiko Carstens 401*2c72a44eSMartin Schwidefsky static int __init nocad_setup(char *str) 402*2c72a44eSMartin Schwidefsky { 403*2c72a44eSMartin Schwidefsky S390_lowcore.machine_flags &= ~MACHINE_FLAG_CAD; 404*2c72a44eSMartin Schwidefsky return 0; 405*2c72a44eSMartin Schwidefsky } 406*2c72a44eSMartin Schwidefsky early_param("nocad", nocad_setup); 407*2c72a44eSMartin Schwidefsky 408*2c72a44eSMartin Schwidefsky static int __init cad_init(void) 409*2c72a44eSMartin Schwidefsky { 410*2c72a44eSMartin Schwidefsky if (MACHINE_HAS_CAD) 411*2c72a44eSMartin Schwidefsky /* Enable problem state CAD. */ 412*2c72a44eSMartin Schwidefsky __ctl_set_bit(2, 3); 413*2c72a44eSMartin Schwidefsky return 0; 414*2c72a44eSMartin Schwidefsky } 415*2c72a44eSMartin Schwidefsky early_initcall(cad_init); 416*2c72a44eSMartin Schwidefsky 417761cdf6aSHeiko Carstens static __init void rescue_initrd(void) 418761cdf6aSHeiko Carstens { 419761cdf6aSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 42027e7318cSHeiko Carstens unsigned long min_initrd_addr = (unsigned long) _end + (4UL << 20); 421761cdf6aSHeiko Carstens /* 42227e7318cSHeiko Carstens * Just like in case of IPL from VM reader we make sure there is a 42327e7318cSHeiko Carstens * gap of 4MB between end of kernel and start of initrd. 42427e7318cSHeiko Carstens * That way we can also be sure that saving an NSS will succeed, 42527e7318cSHeiko Carstens * which however only requires different segments. 426761cdf6aSHeiko Carstens */ 427761cdf6aSHeiko Carstens if (!INITRD_START || !INITRD_SIZE) 428761cdf6aSHeiko Carstens return; 42927e7318cSHeiko Carstens if (INITRD_START >= min_initrd_addr) 430761cdf6aSHeiko Carstens return; 43127e7318cSHeiko Carstens memmove((void *) min_initrd_addr, (void *) INITRD_START, INITRD_SIZE); 43227e7318cSHeiko Carstens INITRD_START = min_initrd_addr; 433761cdf6aSHeiko Carstens #endif 434761cdf6aSHeiko Carstens } 435761cdf6aSHeiko Carstens 436a0443fbbSHendrik Brueckner /* Set up boot command line */ 437684d2fd4SHendrik Brueckner static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t)) 438684d2fd4SHendrik Brueckner { 439684d2fd4SHendrik Brueckner char *parm, *delim; 440684d2fd4SHendrik Brueckner size_t rc, len; 441684d2fd4SHendrik Brueckner 442684d2fd4SHendrik Brueckner len = strlen(boot_command_line); 443684d2fd4SHendrik Brueckner 444684d2fd4SHendrik Brueckner delim = boot_command_line + len; /* '\0' character position */ 445684d2fd4SHendrik Brueckner parm = boot_command_line + len + 1; /* append right after '\0' */ 446684d2fd4SHendrik Brueckner 447684d2fd4SHendrik Brueckner rc = ipl_data(parm, COMMAND_LINE_SIZE - len - 1); 448684d2fd4SHendrik Brueckner if (rc) { 449684d2fd4SHendrik Brueckner if (*parm == '=') 450684d2fd4SHendrik Brueckner memmove(boot_command_line, parm + 1, rc); 451684d2fd4SHendrik Brueckner else 452684d2fd4SHendrik Brueckner *delim = ' '; /* replace '\0' with space */ 453684d2fd4SHendrik Brueckner } 454684d2fd4SHendrik Brueckner } 455684d2fd4SHendrik Brueckner 4561fb81057SMichael Holzheu static inline int has_ebcdic_char(const char *str) 457a0443fbbSHendrik Brueckner { 45861fd330dSMartin Schwidefsky int i; 45961fd330dSMartin Schwidefsky 4601fb81057SMichael Holzheu for (i = 0; str[i]; i++) 4611fb81057SMichael Holzheu if (str[i] & 0x80) 4621fb81057SMichael Holzheu return 1; 4631fb81057SMichael Holzheu return 0; 4641fb81057SMichael Holzheu } 46561fd330dSMartin Schwidefsky 4661fb81057SMichael Holzheu static void __init setup_boot_command_line(void) 4671fb81057SMichael Holzheu { 4681fb81057SMichael Holzheu COMMAND_LINE[ARCH_COMMAND_LINE_SIZE - 1] = 0; 4691fb81057SMichael Holzheu /* convert arch command line to ascii if necessary */ 4701fb81057SMichael Holzheu if (has_ebcdic_char(COMMAND_LINE)) 4711fb81057SMichael Holzheu EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE); 472a0443fbbSHendrik Brueckner /* copy arch command line */ 47361fd330dSMartin Schwidefsky strlcpy(boot_command_line, strstrip(COMMAND_LINE), 47461fd330dSMartin Schwidefsky ARCH_COMMAND_LINE_SIZE); 475a0443fbbSHendrik Brueckner 476a0443fbbSHendrik Brueckner /* append IPL PARM data to the boot command line */ 477684d2fd4SHendrik Brueckner if (MACHINE_IS_VM) 478684d2fd4SHendrik Brueckner append_to_cmdline(append_ipl_vmparm); 479684d2fd4SHendrik Brueckner 480684d2fd4SHendrik Brueckner append_to_cmdline(append_ipl_scpdata); 481a0443fbbSHendrik Brueckner } 482a0443fbbSHendrik Brueckner 483ab14de6cSHeiko Carstens /* 484ab14de6cSHeiko Carstens * Save ipl parameters, clear bss memory, initialize storage keys 485ab14de6cSHeiko Carstens * and create a kernel NSS at startup if the SAVESYS= parm is defined 486ab14de6cSHeiko Carstens */ 487ab14de6cSHeiko Carstens void __init startup_init(void) 488ab14de6cSHeiko Carstens { 489b6112ccbSMartin Schwidefsky reset_tod_clock(); 490ab14de6cSHeiko Carstens ipl_save_parameters(); 491761cdf6aSHeiko Carstens rescue_initrd(); 492ab14de6cSHeiko Carstens clear_bss_section(); 493ab14de6cSHeiko Carstens init_kernel_storage_key(); 494ab14de6cSHeiko Carstens lockdep_init(); 495ab14de6cSHeiko Carstens lockdep_off(); 496ab14de6cSHeiko Carstens setup_lowcore_early(); 49714375bc4SMartin Schwidefsky setup_facility_list(); 498a0443fbbSHendrik Brueckner detect_machine_type(); 499a0443fbbSHendrik Brueckner ipl_update_parameters(); 500a0443fbbSHendrik Brueckner setup_boot_command_line(); 501a0443fbbSHendrik Brueckner create_kernel_nss(); 5022e5061e4SHeiko Carstens detect_mvpg(); 5032e5061e4SHeiko Carstens detect_ieee(); 5042e5061e4SHeiko Carstens detect_csp(); 5052e5061e4SHeiko Carstens detect_diag9c(); 5062e5061e4SHeiko Carstens detect_diag44(); 5072e5061e4SHeiko Carstens detect_machine_facilities(); 508fade4dc4SHeiko Carstens setup_topology(); 5097b50da53SMichael Holzheu sclp_early_detect(); 510ab14de6cSHeiko Carstens lockdep_on(); 511ab14de6cSHeiko Carstens } 512