1ab14de6cSHeiko Carstens /* 2ab14de6cSHeiko Carstens * arch/s390/kernel/early.c 3ab14de6cSHeiko Carstens * 4155af2f9SHans-Joachim Picht * Copyright IBM Corp. 2007, 2009 5ab14de6cSHeiko Carstens * Author(s): Hongjie Yang <hongjie@us.ibm.com>, 6ab14de6cSHeiko Carstens * Heiko Carstens <heiko.carstens@de.ibm.com> 7ab14de6cSHeiko Carstens */ 8ab14de6cSHeiko Carstens 911af97e1SHendrik Brueckner #define KMSG_COMPONENT "setup" 1011af97e1SHendrik Brueckner #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 1111af97e1SHendrik Brueckner 1292e6ecf3SChristian Borntraeger #include <linux/compiler.h> 13ab14de6cSHeiko Carstens #include <linux/init.h> 14ab14de6cSHeiko Carstens #include <linux/errno.h> 15ab14de6cSHeiko Carstens #include <linux/string.h> 16ab14de6cSHeiko Carstens #include <linux/ctype.h> 17dfd9f7abSHeiko Carstens #include <linux/ftrace.h> 18ab14de6cSHeiko Carstens #include <linux/lockdep.h> 19ab14de6cSHeiko Carstens #include <linux/module.h> 20ab14de6cSHeiko Carstens #include <linux/pfn.h> 21ab14de6cSHeiko Carstens #include <linux/uaccess.h> 2211af97e1SHendrik Brueckner #include <linux/kernel.h> 23a0443fbbSHendrik Brueckner #include <asm/ebcdic.h> 2446b05d26SMichael Holzheu #include <asm/ipl.h> 25ab14de6cSHeiko Carstens #include <asm/lowcore.h> 26ab14de6cSHeiko Carstens #include <asm/processor.h> 27ab14de6cSHeiko Carstens #include <asm/sections.h> 28ab14de6cSHeiko Carstens #include <asm/setup.h> 2992e6ecf3SChristian Borntraeger #include <asm/sysinfo.h> 30ab14de6cSHeiko Carstens #include <asm/cpcmd.h> 31ab14de6cSHeiko Carstens #include <asm/sclp.h> 32a0616cdeSDavid Howells #include <asm/facility.h> 33a806170eSHeiko Carstens #include "entry.h" 34ab14de6cSHeiko Carstens 35ab14de6cSHeiko Carstens /* 36ab14de6cSHeiko Carstens * Create a Kernel NSS if the SAVESYS= parameter is defined 37ab14de6cSHeiko Carstens */ 38a0443fbbSHendrik Brueckner #define DEFSYS_CMD_SIZE 128 39ab14de6cSHeiko Carstens #define SAVESYS_CMD_SIZE 32 40ab14de6cSHeiko Carstens 41ab14de6cSHeiko Carstens char kernel_nss_name[NSS_NAME_SIZE + 1]; 42ab14de6cSHeiko Carstens 43a0443fbbSHendrik Brueckner static void __init setup_boot_command_line(void); 44a0443fbbSHendrik Brueckner 45b6112ccbSMartin Schwidefsky /* 46b6112ccbSMartin Schwidefsky * Get the TOD clock running. 47b6112ccbSMartin Schwidefsky */ 48b6112ccbSMartin Schwidefsky static void __init reset_tod_clock(void) 49b6112ccbSMartin Schwidefsky { 50b6112ccbSMartin Schwidefsky u64 time; 51b6112ccbSMartin Schwidefsky 52b6112ccbSMartin Schwidefsky if (store_clock(&time) == 0) 53b6112ccbSMartin Schwidefsky return; 54b6112ccbSMartin Schwidefsky /* TOD clock not running. Set the clock to Unix Epoch. */ 55b6112ccbSMartin Schwidefsky if (set_clock(TOD_UNIX_EPOCH) != 0 || store_clock(&time) != 0) 56b6112ccbSMartin Schwidefsky disabled_wait(0); 57b6112ccbSMartin Schwidefsky 58b6112ccbSMartin Schwidefsky sched_clock_base_cc = TOD_UNIX_EPOCH; 59b89031e0SMartin Schwidefsky S390_lowcore.last_update_clock = sched_clock_base_cc; 60b6112ccbSMartin Schwidefsky } 61a0443fbbSHendrik Brueckner 62ab14de6cSHeiko Carstens #ifdef CONFIG_SHARED_KERNEL 63a0443fbbSHendrik Brueckner int __init savesys_ipl_nss(char *cmd, const int cmdlen); 64a0443fbbSHendrik Brueckner 65a0443fbbSHendrik Brueckner asm( 66a0443fbbSHendrik Brueckner " .section .init.text,\"ax\",@progbits\n" 67a0443fbbSHendrik Brueckner " .align 4\n" 68a0443fbbSHendrik Brueckner " .type savesys_ipl_nss, @function\n" 69a0443fbbSHendrik Brueckner "savesys_ipl_nss:\n" 70a0443fbbSHendrik Brueckner #ifdef CONFIG_64BIT 71a0443fbbSHendrik Brueckner " stmg 6,15,48(15)\n" 72a0443fbbSHendrik Brueckner " lgr 14,3\n" 73a0443fbbSHendrik Brueckner " sam31\n" 74a0443fbbSHendrik Brueckner " diag 2,14,0x8\n" 75a0443fbbSHendrik Brueckner " sam64\n" 76a0443fbbSHendrik Brueckner " lgr 2,14\n" 77a0443fbbSHendrik Brueckner " lmg 6,15,48(15)\n" 78a0443fbbSHendrik Brueckner #else 79a0443fbbSHendrik Brueckner " stm 6,15,24(15)\n" 80a0443fbbSHendrik Brueckner " lr 14,3\n" 81a0443fbbSHendrik Brueckner " diag 2,14,0x8\n" 82a0443fbbSHendrik Brueckner " lr 2,14\n" 83a0443fbbSHendrik Brueckner " lm 6,15,24(15)\n" 84a0443fbbSHendrik Brueckner #endif 85a0443fbbSHendrik Brueckner " br 14\n" 8618764463SHeiko Carstens " .size savesys_ipl_nss, .-savesys_ipl_nss\n" 8718764463SHeiko Carstens " .previous\n"); 88a0443fbbSHendrik Brueckner 89684d2fd4SHendrik Brueckner static __initdata char upper_command_line[COMMAND_LINE_SIZE]; 90684d2fd4SHendrik Brueckner 91ab14de6cSHeiko Carstens static noinline __init void create_kernel_nss(void) 92ab14de6cSHeiko Carstens { 93ab14de6cSHeiko Carstens unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size; 94ab14de6cSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 95ab14de6cSHeiko Carstens unsigned int sinitrd_pfn, einitrd_pfn; 96ab14de6cSHeiko Carstens #endif 97ab14de6cSHeiko Carstens int response; 9869ac43b0SChen Liu int hlen; 99a0443fbbSHendrik Brueckner size_t len; 100ab14de6cSHeiko Carstens char *savesys_ptr; 101ab14de6cSHeiko Carstens char defsys_cmd[DEFSYS_CMD_SIZE]; 102ab14de6cSHeiko Carstens char savesys_cmd[SAVESYS_CMD_SIZE]; 103ab14de6cSHeiko Carstens 104ab14de6cSHeiko Carstens /* Do nothing if we are not running under VM */ 105ab14de6cSHeiko Carstens if (!MACHINE_IS_VM) 106ab14de6cSHeiko Carstens return; 107ab14de6cSHeiko Carstens 108ab14de6cSHeiko Carstens /* Convert COMMAND_LINE to upper case */ 109a0443fbbSHendrik Brueckner for (i = 0; i < strlen(boot_command_line); i++) 110a0443fbbSHendrik Brueckner upper_command_line[i] = toupper(boot_command_line[i]); 111ab14de6cSHeiko Carstens 112ab14de6cSHeiko Carstens savesys_ptr = strstr(upper_command_line, "SAVESYS="); 113ab14de6cSHeiko Carstens 114ab14de6cSHeiko Carstens if (!savesys_ptr) 115ab14de6cSHeiko Carstens return; 116ab14de6cSHeiko Carstens 117ab14de6cSHeiko Carstens savesys_ptr += 8; /* Point to the beginning of the NSS name */ 118ab14de6cSHeiko Carstens for (i = 0; i < NSS_NAME_SIZE; i++) { 119ab14de6cSHeiko Carstens if (savesys_ptr[i] == ' ' || savesys_ptr[i] == '\0') 120ab14de6cSHeiko Carstens break; 121ab14de6cSHeiko Carstens kernel_nss_name[i] = savesys_ptr[i]; 122ab14de6cSHeiko Carstens } 123ab14de6cSHeiko Carstens 124ab14de6cSHeiko Carstens stext_pfn = PFN_DOWN(__pa(&_stext)); 125ab14de6cSHeiko Carstens eshared_pfn = PFN_DOWN(__pa(&_eshared)); 126ab14de6cSHeiko Carstens end_pfn = PFN_UP(__pa(&_end)); 127ab14de6cSHeiko Carstens min_size = end_pfn << 2; 128ab14de6cSHeiko Carstens 12969ac43b0SChen Liu hlen = snprintf(defsys_cmd, DEFSYS_CMD_SIZE, 13069ac43b0SChen Liu "DEFSYS %s 00000-%.5X EW %.5X-%.5X SR %.5X-%.5X", 13169ac43b0SChen Liu kernel_nss_name, stext_pfn - 1, stext_pfn, 13269ac43b0SChen Liu eshared_pfn - 1, eshared_pfn, end_pfn); 133ab14de6cSHeiko Carstens 134ab14de6cSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 135ab14de6cSHeiko Carstens if (INITRD_START && INITRD_SIZE) { 136ab14de6cSHeiko Carstens sinitrd_pfn = PFN_DOWN(__pa(INITRD_START)); 137ab14de6cSHeiko Carstens einitrd_pfn = PFN_UP(__pa(INITRD_START + INITRD_SIZE)); 138ab14de6cSHeiko Carstens min_size = einitrd_pfn << 2; 13969ac43b0SChen Liu hlen += snprintf(defsys_cmd + hlen, DEFSYS_CMD_SIZE - hlen, 14069ac43b0SChen Liu " EW %.5X-%.5X", sinitrd_pfn, einitrd_pfn); 141ab14de6cSHeiko Carstens } 142ab14de6cSHeiko Carstens #endif 143ab14de6cSHeiko Carstens 14469ac43b0SChen Liu snprintf(defsys_cmd + hlen, DEFSYS_CMD_SIZE - hlen, 14569ac43b0SChen Liu " EW MINSIZE=%.7iK PARMREGS=0-13", min_size); 14669ac43b0SChen Liu defsys_cmd[DEFSYS_CMD_SIZE - 1] = '\0'; 147894e491eSHeiko Carstens snprintf(savesys_cmd, SAVESYS_CMD_SIZE, "SAVESYS %s \n IPL %s", 148ab14de6cSHeiko Carstens kernel_nss_name, kernel_nss_name); 149894e491eSHeiko Carstens savesys_cmd[SAVESYS_CMD_SIZE - 1] = '\0'; 150ab14de6cSHeiko Carstens 151ab14de6cSHeiko Carstens __cpcmd(defsys_cmd, NULL, 0, &response); 152ab14de6cSHeiko Carstens 153583b33bcSHongjie Yang if (response != 0) { 15411af97e1SHendrik Brueckner pr_err("Defining the Linux kernel NSS failed with rc=%d\n", 15511af97e1SHendrik Brueckner response); 156583b33bcSHongjie Yang kernel_nss_name[0] = '\0'; 157ab14de6cSHeiko Carstens return; 158583b33bcSHongjie Yang } 159ab14de6cSHeiko Carstens 160a0443fbbSHendrik Brueckner len = strlen(savesys_cmd); 161a0443fbbSHendrik Brueckner ASCEBC(savesys_cmd, len); 162a0443fbbSHendrik Brueckner response = savesys_ipl_nss(savesys_cmd, len); 163ab14de6cSHeiko Carstens 164a0443fbbSHendrik Brueckner /* On success: response is equal to the command size, 165a0443fbbSHendrik Brueckner * max SAVESYS_CMD_SIZE 166a0443fbbSHendrik Brueckner * On error: response contains the numeric portion of cp error message. 167a0443fbbSHendrik Brueckner * for SAVESYS it will be >= 263 16811af97e1SHendrik Brueckner * for missing privilege class, it will be 1 169a0443fbbSHendrik Brueckner */ 17011af97e1SHendrik Brueckner if (response > SAVESYS_CMD_SIZE || response == 1) { 17111af97e1SHendrik Brueckner pr_err("Saving the Linux kernel NSS failed with rc=%d\n", 17211af97e1SHendrik Brueckner response); 173583b33bcSHongjie Yang kernel_nss_name[0] = '\0'; 174ab14de6cSHeiko Carstens return; 175583b33bcSHongjie Yang } 176ab14de6cSHeiko Carstens 177b89031e0SMartin Schwidefsky /* re-initialize cputime accounting. */ 178b89031e0SMartin Schwidefsky sched_clock_base_cc = get_clock(); 179b89031e0SMartin Schwidefsky S390_lowcore.last_update_clock = sched_clock_base_cc; 180b89031e0SMartin Schwidefsky S390_lowcore.last_update_timer = 0x7fffffffffffffffULL; 181b89031e0SMartin Schwidefsky S390_lowcore.user_timer = 0; 182b89031e0SMartin Schwidefsky S390_lowcore.system_timer = 0; 183b89031e0SMartin Schwidefsky asm volatile("SPT 0(%0)" : : "a" (&S390_lowcore.last_update_timer)); 184b89031e0SMartin Schwidefsky 185a0443fbbSHendrik Brueckner /* re-setup boot command line with new ipl vm parms */ 186a0443fbbSHendrik Brueckner ipl_update_parameters(); 187a0443fbbSHendrik Brueckner setup_boot_command_line(); 188a0443fbbSHendrik Brueckner 189ab14de6cSHeiko Carstens ipl_flags = IPL_NSS_VALID; 190ab14de6cSHeiko Carstens } 191ab14de6cSHeiko Carstens 192ab14de6cSHeiko Carstens #else /* CONFIG_SHARED_KERNEL */ 193ab14de6cSHeiko Carstens 194ab14de6cSHeiko Carstens static inline void create_kernel_nss(void) { } 195ab14de6cSHeiko Carstens 196ab14de6cSHeiko Carstens #endif /* CONFIG_SHARED_KERNEL */ 197ab14de6cSHeiko Carstens 198ab14de6cSHeiko Carstens /* 199ab14de6cSHeiko Carstens * Clear bss memory 200ab14de6cSHeiko Carstens */ 201ab14de6cSHeiko Carstens static noinline __init void clear_bss_section(void) 202ab14de6cSHeiko Carstens { 203229d9c6dSHeiko Carstens memset(__bss_start, 0, __bss_stop - __bss_start); 204ab14de6cSHeiko Carstens } 205ab14de6cSHeiko Carstens 206ab14de6cSHeiko Carstens /* 207ab14de6cSHeiko Carstens * Initialize storage key for kernel pages 208ab14de6cSHeiko Carstens */ 209ab14de6cSHeiko Carstens static noinline __init void init_kernel_storage_key(void) 210ab14de6cSHeiko Carstens { 211ab14de6cSHeiko Carstens unsigned long end_pfn, init_pfn; 212ab14de6cSHeiko Carstens 213ab14de6cSHeiko Carstens end_pfn = PFN_UP(__pa(&_end)); 214ab14de6cSHeiko Carstens 215ab14de6cSHeiko Carstens for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++) 216e2b8d7afSMartin Schwidefsky page_set_storage_key(init_pfn << PAGE_SHIFT, 217e2b8d7afSMartin Schwidefsky PAGE_DEFAULT_KEY, 0); 218ab14de6cSHeiko Carstens } 219ab14de6cSHeiko Carstens 22092e6ecf3SChristian Borntraeger static __initdata struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE); 22192e6ecf3SChristian Borntraeger 222ab14de6cSHeiko Carstens static noinline __init void detect_machine_type(void) 223ab14de6cSHeiko Carstens { 22427d71602SMartin Schwidefsky /* Check current-configuration-level */ 22527d71602SMartin Schwidefsky if ((stsi(NULL, 0, 0, 0) >> 28) <= 2) { 22627d71602SMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR; 22792e6ecf3SChristian Borntraeger return; 22827d71602SMartin Schwidefsky } 22927d71602SMartin Schwidefsky /* Get virtual-machine cpu information. */ 23027d71602SMartin Schwidefsky if (stsi(&vmms, 3, 2, 2) == -ENOSYS || !vmms.count) 23192e6ecf3SChristian Borntraeger return; 232ab14de6cSHeiko Carstens 23392e6ecf3SChristian Borntraeger /* Running under KVM? If not we assume z/VM */ 23492e6ecf3SChristian Borntraeger if (!memcmp(vmms.vm[0].cpi, "\xd2\xe5\xd4", 3)) 235d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_KVM; 23692e6ecf3SChristian Borntraeger else 237d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_VM; 238ab14de6cSHeiko Carstens } 239ab14de6cSHeiko Carstens 240*a3415703SMichael Holzheu static void early_pgm_check_handler(void) 241ab14de6cSHeiko Carstens { 242ab14de6cSHeiko Carstens unsigned long addr; 243ab14de6cSHeiko Carstens const struct exception_table_entry *fixup; 244ab14de6cSHeiko Carstens 245ab14de6cSHeiko Carstens addr = S390_lowcore.program_old_psw.addr; 246ab14de6cSHeiko Carstens fixup = search_exception_tables(addr & PSW_ADDR_INSN); 247ab14de6cSHeiko Carstens if (!fixup) 248ab14de6cSHeiko Carstens disabled_wait(0); 249ab14de6cSHeiko Carstens S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE; 250ab14de6cSHeiko Carstens } 251ab14de6cSHeiko Carstens 2525f954c34SHeiko Carstens static noinline __init void setup_lowcore_early(void) 253ab14de6cSHeiko Carstens { 254ab14de6cSHeiko Carstens psw_t psw; 255ab14de6cSHeiko Carstens 256b50511e4SMartin Schwidefsky psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA; 257ab14de6cSHeiko Carstens psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_ext_handler; 258ab14de6cSHeiko Carstens S390_lowcore.external_new_psw = psw; 259ab14de6cSHeiko Carstens psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 260ab14de6cSHeiko Carstens S390_lowcore.program_new_psw = psw; 261ab14de6cSHeiko Carstens s390_base_pgm_handler_fn = early_pgm_check_handler; 262ab14de6cSHeiko Carstens } 263ab14de6cSHeiko Carstens 26414375bc4SMartin Schwidefsky static noinline __init void setup_facility_list(void) 26514375bc4SMartin Schwidefsky { 2663ab121abSMichael Holzheu stfle(S390_lowcore.stfle_fac_list, 2673ab121abSMichael Holzheu ARRAY_SIZE(S390_lowcore.stfle_fac_list)); 26814375bc4SMartin Schwidefsky } 26914375bc4SMartin Schwidefsky 27053492b1dSGerald Schaefer static noinline __init void setup_hpage(void) 27153492b1dSGerald Schaefer { 27253492b1dSGerald Schaefer #ifndef CONFIG_DEBUG_PAGEALLOC 27314375bc4SMartin Schwidefsky if (!test_facility(2) || !test_facility(8)) 27453492b1dSGerald Schaefer return; 275d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE; 27653492b1dSGerald Schaefer __ctl_set_bit(0, 23); 27753492b1dSGerald Schaefer #endif 27853492b1dSGerald Schaefer } 27953492b1dSGerald Schaefer 2802e5061e4SHeiko Carstens static __init void detect_mvpg(void) 2812e5061e4SHeiko Carstens { 2822e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 2832e5061e4SHeiko Carstens int rc; 2842e5061e4SHeiko Carstens 2852e5061e4SHeiko Carstens asm volatile( 2862e5061e4SHeiko Carstens " la 0,0\n" 2872e5061e4SHeiko Carstens " mvpg %2,%2\n" 2882e5061e4SHeiko Carstens "0: la %0,0\n" 2892e5061e4SHeiko Carstens "1:\n" 2902e5061e4SHeiko Carstens EX_TABLE(0b,1b) 2912e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0"); 2922e5061e4SHeiko Carstens if (!rc) 293d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_MVPG; 2942e5061e4SHeiko Carstens #endif 2952e5061e4SHeiko Carstens } 2962e5061e4SHeiko Carstens 2972e5061e4SHeiko Carstens static __init void detect_ieee(void) 2982e5061e4SHeiko Carstens { 2992e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 3002e5061e4SHeiko Carstens int rc, tmp; 3012e5061e4SHeiko Carstens 3022e5061e4SHeiko Carstens asm volatile( 3032e5061e4SHeiko Carstens " efpc %1,0\n" 3042e5061e4SHeiko Carstens "0: la %0,0\n" 3052e5061e4SHeiko Carstens "1:\n" 3062e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3072e5061e4SHeiko Carstens : "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc"); 3082e5061e4SHeiko Carstens if (!rc) 309d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_IEEE; 3102e5061e4SHeiko Carstens #endif 3112e5061e4SHeiko Carstens } 3122e5061e4SHeiko Carstens 3132e5061e4SHeiko Carstens static __init void detect_csp(void) 3142e5061e4SHeiko Carstens { 3152e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 3162e5061e4SHeiko Carstens int rc; 3172e5061e4SHeiko Carstens 3182e5061e4SHeiko Carstens asm volatile( 3192e5061e4SHeiko Carstens " la 0,0\n" 3202e5061e4SHeiko Carstens " la 1,0\n" 3212e5061e4SHeiko Carstens " la 2,4\n" 3222e5061e4SHeiko Carstens " csp 0,2\n" 3232e5061e4SHeiko Carstens "0: la %0,0\n" 3242e5061e4SHeiko Carstens "1:\n" 3252e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3262e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2"); 3272e5061e4SHeiko Carstens if (!rc) 328d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_CSP; 3292e5061e4SHeiko Carstens #endif 3302e5061e4SHeiko Carstens } 3312e5061e4SHeiko Carstens 3322e5061e4SHeiko Carstens static __init void detect_diag9c(void) 3332e5061e4SHeiko Carstens { 3342e5061e4SHeiko Carstens unsigned int cpu_address; 3352e5061e4SHeiko Carstens int rc; 3362e5061e4SHeiko Carstens 3372e5061e4SHeiko Carstens cpu_address = stap(); 3382e5061e4SHeiko Carstens asm volatile( 3392e5061e4SHeiko Carstens " diag %2,0,0x9c\n" 3402e5061e4SHeiko Carstens "0: la %0,0\n" 3412e5061e4SHeiko Carstens "1:\n" 3422e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3432e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc"); 3442e5061e4SHeiko Carstens if (!rc) 345d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C; 3462e5061e4SHeiko Carstens } 3472e5061e4SHeiko Carstens 3482e5061e4SHeiko Carstens static __init void detect_diag44(void) 3492e5061e4SHeiko Carstens { 3502e5061e4SHeiko Carstens #ifdef CONFIG_64BIT 3512e5061e4SHeiko Carstens int rc; 3522e5061e4SHeiko Carstens 3532e5061e4SHeiko Carstens asm volatile( 3542e5061e4SHeiko Carstens " diag 0,0,0x44\n" 3552e5061e4SHeiko Carstens "0: la %0,0\n" 3562e5061e4SHeiko Carstens "1:\n" 3572e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3582e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc"); 3592e5061e4SHeiko Carstens if (!rc) 360d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG44; 3612e5061e4SHeiko Carstens #endif 3622e5061e4SHeiko Carstens } 3632e5061e4SHeiko Carstens 3642e5061e4SHeiko Carstens static __init void detect_machine_facilities(void) 3652e5061e4SHeiko Carstens { 3662e5061e4SHeiko Carstens #ifdef CONFIG_64BIT 36714375bc4SMartin Schwidefsky if (test_facility(3)) 368d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE; 36914375bc4SMartin Schwidefsky if (test_facility(8)) 370d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF; 3719186d7a9SHeiko Carstens if (test_facility(11)) 3729186d7a9SHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY; 37314375bc4SMartin Schwidefsky if (test_facility(27)) 374d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS; 37514375bc4SMartin Schwidefsky if (test_facility(40)) 376cd3b70f5SCarsten Otte S390_lowcore.machine_flags |= MACHINE_FLAG_SPP; 3772e5061e4SHeiko Carstens #endif 3782e5061e4SHeiko Carstens } 3792e5061e4SHeiko Carstens 380761cdf6aSHeiko Carstens static __init void rescue_initrd(void) 381761cdf6aSHeiko Carstens { 382761cdf6aSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 38327e7318cSHeiko Carstens unsigned long min_initrd_addr = (unsigned long) _end + (4UL << 20); 384761cdf6aSHeiko Carstens /* 38527e7318cSHeiko Carstens * Just like in case of IPL from VM reader we make sure there is a 38627e7318cSHeiko Carstens * gap of 4MB between end of kernel and start of initrd. 38727e7318cSHeiko Carstens * That way we can also be sure that saving an NSS will succeed, 38827e7318cSHeiko Carstens * which however only requires different segments. 389761cdf6aSHeiko Carstens */ 390761cdf6aSHeiko Carstens if (!INITRD_START || !INITRD_SIZE) 391761cdf6aSHeiko Carstens return; 39227e7318cSHeiko Carstens if (INITRD_START >= min_initrd_addr) 393761cdf6aSHeiko Carstens return; 39427e7318cSHeiko Carstens memmove((void *) min_initrd_addr, (void *) INITRD_START, INITRD_SIZE); 39527e7318cSHeiko Carstens INITRD_START = min_initrd_addr; 396761cdf6aSHeiko Carstens #endif 397761cdf6aSHeiko Carstens } 398761cdf6aSHeiko Carstens 399a0443fbbSHendrik Brueckner /* Set up boot command line */ 400684d2fd4SHendrik Brueckner static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t)) 401684d2fd4SHendrik Brueckner { 402684d2fd4SHendrik Brueckner char *parm, *delim; 403684d2fd4SHendrik Brueckner size_t rc, len; 404684d2fd4SHendrik Brueckner 405684d2fd4SHendrik Brueckner len = strlen(boot_command_line); 406684d2fd4SHendrik Brueckner 407684d2fd4SHendrik Brueckner delim = boot_command_line + len; /* '\0' character position */ 408684d2fd4SHendrik Brueckner parm = boot_command_line + len + 1; /* append right after '\0' */ 409684d2fd4SHendrik Brueckner 410684d2fd4SHendrik Brueckner rc = ipl_data(parm, COMMAND_LINE_SIZE - len - 1); 411684d2fd4SHendrik Brueckner if (rc) { 412684d2fd4SHendrik Brueckner if (*parm == '=') 413684d2fd4SHendrik Brueckner memmove(boot_command_line, parm + 1, rc); 414684d2fd4SHendrik Brueckner else 415684d2fd4SHendrik Brueckner *delim = ' '; /* replace '\0' with space */ 416684d2fd4SHendrik Brueckner } 417684d2fd4SHendrik Brueckner } 418684d2fd4SHendrik Brueckner 4191fb81057SMichael Holzheu static inline int has_ebcdic_char(const char *str) 420a0443fbbSHendrik Brueckner { 42161fd330dSMartin Schwidefsky int i; 42261fd330dSMartin Schwidefsky 4231fb81057SMichael Holzheu for (i = 0; str[i]; i++) 4241fb81057SMichael Holzheu if (str[i] & 0x80) 4251fb81057SMichael Holzheu return 1; 4261fb81057SMichael Holzheu return 0; 4271fb81057SMichael Holzheu } 42861fd330dSMartin Schwidefsky 4291fb81057SMichael Holzheu static void __init setup_boot_command_line(void) 4301fb81057SMichael Holzheu { 4311fb81057SMichael Holzheu COMMAND_LINE[ARCH_COMMAND_LINE_SIZE - 1] = 0; 4321fb81057SMichael Holzheu /* convert arch command line to ascii if necessary */ 4331fb81057SMichael Holzheu if (has_ebcdic_char(COMMAND_LINE)) 4341fb81057SMichael Holzheu EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE); 435a0443fbbSHendrik Brueckner /* copy arch command line */ 43661fd330dSMartin Schwidefsky strlcpy(boot_command_line, strstrip(COMMAND_LINE), 43761fd330dSMartin Schwidefsky ARCH_COMMAND_LINE_SIZE); 438a0443fbbSHendrik Brueckner 439a0443fbbSHendrik Brueckner /* append IPL PARM data to the boot command line */ 440684d2fd4SHendrik Brueckner if (MACHINE_IS_VM) 441684d2fd4SHendrik Brueckner append_to_cmdline(append_ipl_vmparm); 442684d2fd4SHendrik Brueckner 443684d2fd4SHendrik Brueckner append_to_cmdline(append_ipl_scpdata); 444a0443fbbSHendrik Brueckner } 445a0443fbbSHendrik Brueckner 446a0443fbbSHendrik Brueckner 447ab14de6cSHeiko Carstens /* 448ab14de6cSHeiko Carstens * Save ipl parameters, clear bss memory, initialize storage keys 449ab14de6cSHeiko Carstens * and create a kernel NSS at startup if the SAVESYS= parm is defined 450ab14de6cSHeiko Carstens */ 451ab14de6cSHeiko Carstens void __init startup_init(void) 452ab14de6cSHeiko Carstens { 453b6112ccbSMartin Schwidefsky reset_tod_clock(); 454ab14de6cSHeiko Carstens ipl_save_parameters(); 455761cdf6aSHeiko Carstens rescue_initrd(); 456ab14de6cSHeiko Carstens clear_bss_section(); 457ab14de6cSHeiko Carstens init_kernel_storage_key(); 458ab14de6cSHeiko Carstens lockdep_init(); 459ab14de6cSHeiko Carstens lockdep_off(); 460ab14de6cSHeiko Carstens sort_main_extable(); 461ab14de6cSHeiko Carstens setup_lowcore_early(); 46214375bc4SMartin Schwidefsky setup_facility_list(); 463a0443fbbSHendrik Brueckner detect_machine_type(); 464a0443fbbSHendrik Brueckner ipl_update_parameters(); 465a0443fbbSHendrik Brueckner setup_boot_command_line(); 466a0443fbbSHendrik Brueckner create_kernel_nss(); 4672e5061e4SHeiko Carstens detect_mvpg(); 4682e5061e4SHeiko Carstens detect_ieee(); 4692e5061e4SHeiko Carstens detect_csp(); 4702e5061e4SHeiko Carstens detect_diag9c(); 4712e5061e4SHeiko Carstens detect_diag44(); 4722e5061e4SHeiko Carstens detect_machine_facilities(); 47353492b1dSGerald Schaefer setup_hpage(); 47483119ad4SHeiko Carstens sclp_facilities_detect(); 47523d17421SHeiko Carstens detect_memory_layout(memory_chunk); 476dfd9f7abSHeiko Carstens #ifdef CONFIG_DYNAMIC_FTRACE 477dfd9f7abSHeiko Carstens S390_lowcore.ftrace_func = (unsigned long)ftrace_caller; 478dfd9f7abSHeiko Carstens #endif 479ab14de6cSHeiko Carstens lockdep_on(); 480ab14de6cSHeiko Carstens } 481