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> 32a806170eSHeiko Carstens #include "entry.h" 33ab14de6cSHeiko Carstens 34ab14de6cSHeiko Carstens /* 35ab14de6cSHeiko Carstens * Create a Kernel NSS if the SAVESYS= parameter is defined 36ab14de6cSHeiko Carstens */ 37a0443fbbSHendrik Brueckner #define DEFSYS_CMD_SIZE 128 38ab14de6cSHeiko Carstens #define SAVESYS_CMD_SIZE 32 39ab14de6cSHeiko Carstens 40ab14de6cSHeiko Carstens char kernel_nss_name[NSS_NAME_SIZE + 1]; 41ab14de6cSHeiko Carstens 42a0443fbbSHendrik Brueckner static void __init setup_boot_command_line(void); 43a0443fbbSHendrik Brueckner 44b6112ccbSMartin Schwidefsky /* 45b6112ccbSMartin Schwidefsky * Get the TOD clock running. 46b6112ccbSMartin Schwidefsky */ 47b6112ccbSMartin Schwidefsky static void __init reset_tod_clock(void) 48b6112ccbSMartin Schwidefsky { 49b6112ccbSMartin Schwidefsky u64 time; 50b6112ccbSMartin Schwidefsky 51b6112ccbSMartin Schwidefsky if (store_clock(&time) == 0) 52b6112ccbSMartin Schwidefsky return; 53b6112ccbSMartin Schwidefsky /* TOD clock not running. Set the clock to Unix Epoch. */ 54b6112ccbSMartin Schwidefsky if (set_clock(TOD_UNIX_EPOCH) != 0 || store_clock(&time) != 0) 55b6112ccbSMartin Schwidefsky disabled_wait(0); 56b6112ccbSMartin Schwidefsky 57b6112ccbSMartin Schwidefsky sched_clock_base_cc = TOD_UNIX_EPOCH; 58b89031e0SMartin Schwidefsky S390_lowcore.last_update_clock = sched_clock_base_cc; 59b6112ccbSMartin Schwidefsky } 60a0443fbbSHendrik Brueckner 61ab14de6cSHeiko Carstens #ifdef CONFIG_SHARED_KERNEL 62a0443fbbSHendrik Brueckner int __init savesys_ipl_nss(char *cmd, const int cmdlen); 63a0443fbbSHendrik Brueckner 64a0443fbbSHendrik Brueckner asm( 65a0443fbbSHendrik Brueckner " .section .init.text,\"ax\",@progbits\n" 66a0443fbbSHendrik Brueckner " .align 4\n" 67a0443fbbSHendrik Brueckner " .type savesys_ipl_nss, @function\n" 68a0443fbbSHendrik Brueckner "savesys_ipl_nss:\n" 69a0443fbbSHendrik Brueckner #ifdef CONFIG_64BIT 70a0443fbbSHendrik Brueckner " stmg 6,15,48(15)\n" 71a0443fbbSHendrik Brueckner " lgr 14,3\n" 72a0443fbbSHendrik Brueckner " sam31\n" 73a0443fbbSHendrik Brueckner " diag 2,14,0x8\n" 74a0443fbbSHendrik Brueckner " sam64\n" 75a0443fbbSHendrik Brueckner " lgr 2,14\n" 76a0443fbbSHendrik Brueckner " lmg 6,15,48(15)\n" 77a0443fbbSHendrik Brueckner #else 78a0443fbbSHendrik Brueckner " stm 6,15,24(15)\n" 79a0443fbbSHendrik Brueckner " lr 14,3\n" 80a0443fbbSHendrik Brueckner " diag 2,14,0x8\n" 81a0443fbbSHendrik Brueckner " lr 2,14\n" 82a0443fbbSHendrik Brueckner " lm 6,15,24(15)\n" 83a0443fbbSHendrik Brueckner #endif 84a0443fbbSHendrik Brueckner " br 14\n" 8518764463SHeiko Carstens " .size savesys_ipl_nss, .-savesys_ipl_nss\n" 8618764463SHeiko Carstens " .previous\n"); 87a0443fbbSHendrik Brueckner 88684d2fd4SHendrik Brueckner static __initdata char upper_command_line[COMMAND_LINE_SIZE]; 89684d2fd4SHendrik Brueckner 90ab14de6cSHeiko Carstens static noinline __init void create_kernel_nss(void) 91ab14de6cSHeiko Carstens { 92ab14de6cSHeiko Carstens unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size; 93ab14de6cSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 94ab14de6cSHeiko Carstens unsigned int sinitrd_pfn, einitrd_pfn; 95ab14de6cSHeiko Carstens #endif 96ab14de6cSHeiko Carstens int response; 97a0443fbbSHendrik Brueckner size_t len; 98ab14de6cSHeiko Carstens char *savesys_ptr; 99ab14de6cSHeiko Carstens char defsys_cmd[DEFSYS_CMD_SIZE]; 100ab14de6cSHeiko Carstens char savesys_cmd[SAVESYS_CMD_SIZE]; 101ab14de6cSHeiko Carstens 102ab14de6cSHeiko Carstens /* Do nothing if we are not running under VM */ 103ab14de6cSHeiko Carstens if (!MACHINE_IS_VM) 104ab14de6cSHeiko Carstens return; 105ab14de6cSHeiko Carstens 106ab14de6cSHeiko Carstens /* Convert COMMAND_LINE to upper case */ 107a0443fbbSHendrik Brueckner for (i = 0; i < strlen(boot_command_line); i++) 108a0443fbbSHendrik Brueckner upper_command_line[i] = toupper(boot_command_line[i]); 109ab14de6cSHeiko Carstens 110ab14de6cSHeiko Carstens savesys_ptr = strstr(upper_command_line, "SAVESYS="); 111ab14de6cSHeiko Carstens 112ab14de6cSHeiko Carstens if (!savesys_ptr) 113ab14de6cSHeiko Carstens return; 114ab14de6cSHeiko Carstens 115ab14de6cSHeiko Carstens savesys_ptr += 8; /* Point to the beginning of the NSS name */ 116ab14de6cSHeiko Carstens for (i = 0; i < NSS_NAME_SIZE; i++) { 117ab14de6cSHeiko Carstens if (savesys_ptr[i] == ' ' || savesys_ptr[i] == '\0') 118ab14de6cSHeiko Carstens break; 119ab14de6cSHeiko Carstens kernel_nss_name[i] = savesys_ptr[i]; 120ab14de6cSHeiko Carstens } 121ab14de6cSHeiko Carstens 122ab14de6cSHeiko Carstens stext_pfn = PFN_DOWN(__pa(&_stext)); 123ab14de6cSHeiko Carstens eshared_pfn = PFN_DOWN(__pa(&_eshared)); 124ab14de6cSHeiko Carstens end_pfn = PFN_UP(__pa(&_end)); 125ab14de6cSHeiko Carstens min_size = end_pfn << 2; 126ab14de6cSHeiko Carstens 127ab14de6cSHeiko Carstens sprintf(defsys_cmd, "DEFSYS %s 00000-%.5X EW %.5X-%.5X SR %.5X-%.5X", 128ab14de6cSHeiko Carstens kernel_nss_name, stext_pfn - 1, stext_pfn, eshared_pfn - 1, 129ab14de6cSHeiko Carstens 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; 136ab14de6cSHeiko Carstens sprintf(defsys_cmd, "%s EW %.5X-%.5X", defsys_cmd, 137ab14de6cSHeiko Carstens sinitrd_pfn, einitrd_pfn); 138ab14de6cSHeiko Carstens } 139ab14de6cSHeiko Carstens #endif 140ab14de6cSHeiko Carstens 141a0443fbbSHendrik Brueckner sprintf(defsys_cmd, "%s EW MINSIZE=%.7iK PARMREGS=0-13", 142a0443fbbSHendrik Brueckner defsys_cmd, min_size); 143ab14de6cSHeiko Carstens sprintf(savesys_cmd, "SAVESYS %s \n IPL %s", 144ab14de6cSHeiko Carstens kernel_nss_name, kernel_nss_name); 145ab14de6cSHeiko Carstens 146ab14de6cSHeiko Carstens __cpcmd(defsys_cmd, NULL, 0, &response); 147ab14de6cSHeiko Carstens 148583b33bcSHongjie Yang if (response != 0) { 14911af97e1SHendrik Brueckner pr_err("Defining the Linux kernel NSS failed with rc=%d\n", 15011af97e1SHendrik Brueckner response); 151583b33bcSHongjie Yang kernel_nss_name[0] = '\0'; 152ab14de6cSHeiko Carstens return; 153583b33bcSHongjie Yang } 154ab14de6cSHeiko Carstens 155a0443fbbSHendrik Brueckner len = strlen(savesys_cmd); 156a0443fbbSHendrik Brueckner ASCEBC(savesys_cmd, len); 157a0443fbbSHendrik Brueckner response = savesys_ipl_nss(savesys_cmd, len); 158ab14de6cSHeiko Carstens 159a0443fbbSHendrik Brueckner /* On success: response is equal to the command size, 160a0443fbbSHendrik Brueckner * max SAVESYS_CMD_SIZE 161a0443fbbSHendrik Brueckner * On error: response contains the numeric portion of cp error message. 162a0443fbbSHendrik Brueckner * for SAVESYS it will be >= 263 16311af97e1SHendrik Brueckner * for missing privilege class, it will be 1 164a0443fbbSHendrik Brueckner */ 16511af97e1SHendrik Brueckner if (response > SAVESYS_CMD_SIZE || response == 1) { 16611af97e1SHendrik Brueckner pr_err("Saving the Linux kernel NSS failed with rc=%d\n", 16711af97e1SHendrik Brueckner response); 168583b33bcSHongjie Yang kernel_nss_name[0] = '\0'; 169ab14de6cSHeiko Carstens return; 170583b33bcSHongjie Yang } 171ab14de6cSHeiko Carstens 172b89031e0SMartin Schwidefsky /* re-initialize cputime accounting. */ 173b89031e0SMartin Schwidefsky sched_clock_base_cc = get_clock(); 174b89031e0SMartin Schwidefsky S390_lowcore.last_update_clock = sched_clock_base_cc; 175b89031e0SMartin Schwidefsky S390_lowcore.last_update_timer = 0x7fffffffffffffffULL; 176b89031e0SMartin Schwidefsky S390_lowcore.user_timer = 0; 177b89031e0SMartin Schwidefsky S390_lowcore.system_timer = 0; 178b89031e0SMartin Schwidefsky asm volatile("SPT 0(%0)" : : "a" (&S390_lowcore.last_update_timer)); 179b89031e0SMartin Schwidefsky 180a0443fbbSHendrik Brueckner /* re-setup boot command line with new ipl vm parms */ 181a0443fbbSHendrik Brueckner ipl_update_parameters(); 182a0443fbbSHendrik Brueckner setup_boot_command_line(); 183a0443fbbSHendrik Brueckner 184ab14de6cSHeiko Carstens ipl_flags = IPL_NSS_VALID; 185ab14de6cSHeiko Carstens } 186ab14de6cSHeiko Carstens 187ab14de6cSHeiko Carstens #else /* CONFIG_SHARED_KERNEL */ 188ab14de6cSHeiko Carstens 189ab14de6cSHeiko Carstens static inline void create_kernel_nss(void) { } 190ab14de6cSHeiko Carstens 191ab14de6cSHeiko Carstens #endif /* CONFIG_SHARED_KERNEL */ 192ab14de6cSHeiko Carstens 193ab14de6cSHeiko Carstens /* 194ab14de6cSHeiko Carstens * Clear bss memory 195ab14de6cSHeiko Carstens */ 196ab14de6cSHeiko Carstens static noinline __init void clear_bss_section(void) 197ab14de6cSHeiko Carstens { 198229d9c6dSHeiko Carstens memset(__bss_start, 0, __bss_stop - __bss_start); 199ab14de6cSHeiko Carstens } 200ab14de6cSHeiko Carstens 201ab14de6cSHeiko Carstens /* 202ab14de6cSHeiko Carstens * Initialize storage key for kernel pages 203ab14de6cSHeiko Carstens */ 204ab14de6cSHeiko Carstens static noinline __init void init_kernel_storage_key(void) 205ab14de6cSHeiko Carstens { 206ab14de6cSHeiko Carstens unsigned long end_pfn, init_pfn; 207ab14de6cSHeiko Carstens 208ab14de6cSHeiko Carstens end_pfn = PFN_UP(__pa(&_end)); 209ab14de6cSHeiko Carstens 210ab14de6cSHeiko Carstens for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++) 211ab14de6cSHeiko Carstens page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); 212ab14de6cSHeiko Carstens } 213ab14de6cSHeiko Carstens 21492e6ecf3SChristian Borntraeger static __initdata struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE); 21592e6ecf3SChristian Borntraeger 216ab14de6cSHeiko Carstens static noinline __init void detect_machine_type(void) 217ab14de6cSHeiko Carstens { 21827d71602SMartin Schwidefsky /* Check current-configuration-level */ 21927d71602SMartin Schwidefsky if ((stsi(NULL, 0, 0, 0) >> 28) <= 2) { 22027d71602SMartin Schwidefsky S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR; 22192e6ecf3SChristian Borntraeger return; 22227d71602SMartin Schwidefsky } 22327d71602SMartin Schwidefsky /* Get virtual-machine cpu information. */ 22427d71602SMartin Schwidefsky if (stsi(&vmms, 3, 2, 2) == -ENOSYS || !vmms.count) 22592e6ecf3SChristian Borntraeger return; 226ab14de6cSHeiko Carstens 22792e6ecf3SChristian Borntraeger /* Running under KVM? If not we assume z/VM */ 22892e6ecf3SChristian Borntraeger if (!memcmp(vmms.vm[0].cpi, "\xd2\xe5\xd4", 3)) 229d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_KVM; 23092e6ecf3SChristian Borntraeger else 231d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_VM; 232ab14de6cSHeiko Carstens } 233ab14de6cSHeiko Carstens 2345f954c34SHeiko Carstens static __init void early_pgm_check_handler(void) 235ab14de6cSHeiko Carstens { 236ab14de6cSHeiko Carstens unsigned long addr; 237ab14de6cSHeiko Carstens const struct exception_table_entry *fixup; 238ab14de6cSHeiko Carstens 239ab14de6cSHeiko Carstens addr = S390_lowcore.program_old_psw.addr; 240ab14de6cSHeiko Carstens fixup = search_exception_tables(addr & PSW_ADDR_INSN); 241ab14de6cSHeiko Carstens if (!fixup) 242ab14de6cSHeiko Carstens disabled_wait(0); 243ab14de6cSHeiko Carstens S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE; 244ab14de6cSHeiko Carstens } 245ab14de6cSHeiko Carstens 2465f954c34SHeiko Carstens static noinline __init void setup_lowcore_early(void) 247ab14de6cSHeiko Carstens { 248ab14de6cSHeiko Carstens psw_t psw; 249ab14de6cSHeiko Carstens 250ab14de6cSHeiko Carstens psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; 251ab14de6cSHeiko Carstens psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_ext_handler; 252ab14de6cSHeiko Carstens S390_lowcore.external_new_psw = psw; 253ab14de6cSHeiko Carstens psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 254ab14de6cSHeiko Carstens S390_lowcore.program_new_psw = psw; 255ab14de6cSHeiko Carstens s390_base_pgm_handler_fn = early_pgm_check_handler; 256ab14de6cSHeiko Carstens } 257ab14de6cSHeiko Carstens 25853492b1dSGerald Schaefer static noinline __init void setup_hpage(void) 25953492b1dSGerald Schaefer { 26053492b1dSGerald Schaefer #ifndef CONFIG_DEBUG_PAGEALLOC 26153492b1dSGerald Schaefer unsigned int facilities; 26253492b1dSGerald Schaefer 26353492b1dSGerald Schaefer facilities = stfl(); 26453492b1dSGerald Schaefer if (!(facilities & (1UL << 23)) || !(facilities & (1UL << 29))) 26553492b1dSGerald Schaefer return; 266d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE; 26753492b1dSGerald Schaefer __ctl_set_bit(0, 23); 26853492b1dSGerald Schaefer #endif 26953492b1dSGerald Schaefer } 27053492b1dSGerald Schaefer 2712e5061e4SHeiko Carstens static __init void detect_mvpg(void) 2722e5061e4SHeiko Carstens { 2732e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 2742e5061e4SHeiko Carstens int rc; 2752e5061e4SHeiko Carstens 2762e5061e4SHeiko Carstens asm volatile( 2772e5061e4SHeiko Carstens " la 0,0\n" 2782e5061e4SHeiko Carstens " mvpg %2,%2\n" 2792e5061e4SHeiko Carstens "0: la %0,0\n" 2802e5061e4SHeiko Carstens "1:\n" 2812e5061e4SHeiko Carstens EX_TABLE(0b,1b) 2822e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0"); 2832e5061e4SHeiko Carstens if (!rc) 284d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_MVPG; 2852e5061e4SHeiko Carstens #endif 2862e5061e4SHeiko Carstens } 2872e5061e4SHeiko Carstens 2882e5061e4SHeiko Carstens static __init void detect_ieee(void) 2892e5061e4SHeiko Carstens { 2902e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 2912e5061e4SHeiko Carstens int rc, tmp; 2922e5061e4SHeiko Carstens 2932e5061e4SHeiko Carstens asm volatile( 2942e5061e4SHeiko Carstens " efpc %1,0\n" 2952e5061e4SHeiko Carstens "0: la %0,0\n" 2962e5061e4SHeiko Carstens "1:\n" 2972e5061e4SHeiko Carstens EX_TABLE(0b,1b) 2982e5061e4SHeiko Carstens : "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc"); 2992e5061e4SHeiko Carstens if (!rc) 300d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_IEEE; 3012e5061e4SHeiko Carstens #endif 3022e5061e4SHeiko Carstens } 3032e5061e4SHeiko Carstens 3042e5061e4SHeiko Carstens static __init void detect_csp(void) 3052e5061e4SHeiko Carstens { 3062e5061e4SHeiko Carstens #ifndef CONFIG_64BIT 3072e5061e4SHeiko Carstens int rc; 3082e5061e4SHeiko Carstens 3092e5061e4SHeiko Carstens asm volatile( 3102e5061e4SHeiko Carstens " la 0,0\n" 3112e5061e4SHeiko Carstens " la 1,0\n" 3122e5061e4SHeiko Carstens " la 2,4\n" 3132e5061e4SHeiko Carstens " csp 0,2\n" 3142e5061e4SHeiko Carstens "0: la %0,0\n" 3152e5061e4SHeiko Carstens "1:\n" 3162e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3172e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2"); 3182e5061e4SHeiko Carstens if (!rc) 319d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_CSP; 3202e5061e4SHeiko Carstens #endif 3212e5061e4SHeiko Carstens } 3222e5061e4SHeiko Carstens 3232e5061e4SHeiko Carstens static __init void detect_diag9c(void) 3242e5061e4SHeiko Carstens { 3252e5061e4SHeiko Carstens unsigned int cpu_address; 3262e5061e4SHeiko Carstens int rc; 3272e5061e4SHeiko Carstens 3282e5061e4SHeiko Carstens cpu_address = stap(); 3292e5061e4SHeiko Carstens asm volatile( 3302e5061e4SHeiko Carstens " diag %2,0,0x9c\n" 3312e5061e4SHeiko Carstens "0: la %0,0\n" 3322e5061e4SHeiko Carstens "1:\n" 3332e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3342e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc"); 3352e5061e4SHeiko Carstens if (!rc) 336d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C; 3372e5061e4SHeiko Carstens } 3382e5061e4SHeiko Carstens 3392e5061e4SHeiko Carstens static __init void detect_diag44(void) 3402e5061e4SHeiko Carstens { 3412e5061e4SHeiko Carstens #ifdef CONFIG_64BIT 3422e5061e4SHeiko Carstens int rc; 3432e5061e4SHeiko Carstens 3442e5061e4SHeiko Carstens asm volatile( 3452e5061e4SHeiko Carstens " diag 0,0,0x44\n" 3462e5061e4SHeiko Carstens "0: la %0,0\n" 3472e5061e4SHeiko Carstens "1:\n" 3482e5061e4SHeiko Carstens EX_TABLE(0b,1b) 3492e5061e4SHeiko Carstens : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc"); 3502e5061e4SHeiko Carstens if (!rc) 351d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG44; 3522e5061e4SHeiko Carstens #endif 3532e5061e4SHeiko Carstens } 3542e5061e4SHeiko Carstens 3552e5061e4SHeiko Carstens static __init void detect_machine_facilities(void) 3562e5061e4SHeiko Carstens { 3572e5061e4SHeiko Carstens #ifdef CONFIG_64BIT 3582e5061e4SHeiko Carstens unsigned int facilities; 359*cd3b70f5SCarsten Otte unsigned long long facility_bits; 3602e5061e4SHeiko Carstens 3612e5061e4SHeiko Carstens facilities = stfl(); 3622e5061e4SHeiko Carstens if (facilities & (1 << 28)) 363d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE; 36453492b1dSGerald Schaefer if (facilities & (1 << 23)) 365d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF; 3662e5061e4SHeiko Carstens if (facilities & (1 << 4)) 367d3135e0cSHeiko Carstens S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS; 368*cd3b70f5SCarsten Otte if ((stfle(&facility_bits, 1) > 0) && 369*cd3b70f5SCarsten Otte (facility_bits & (1ULL << (63 - 40)))) 370*cd3b70f5SCarsten Otte S390_lowcore.machine_flags |= MACHINE_FLAG_SPP; 3712e5061e4SHeiko Carstens #endif 3722e5061e4SHeiko Carstens } 3732e5061e4SHeiko Carstens 374761cdf6aSHeiko Carstens static __init void rescue_initrd(void) 375761cdf6aSHeiko Carstens { 376761cdf6aSHeiko Carstens #ifdef CONFIG_BLK_DEV_INITRD 377761cdf6aSHeiko Carstens /* 378761cdf6aSHeiko Carstens * Move the initrd right behind the bss section in case it starts 379761cdf6aSHeiko Carstens * within the bss section. So we don't overwrite it when the bss 380761cdf6aSHeiko Carstens * section gets cleared. 381761cdf6aSHeiko Carstens */ 382761cdf6aSHeiko Carstens if (!INITRD_START || !INITRD_SIZE) 383761cdf6aSHeiko Carstens return; 384761cdf6aSHeiko Carstens if (INITRD_START >= (unsigned long) __bss_stop) 385761cdf6aSHeiko Carstens return; 386761cdf6aSHeiko Carstens memmove(__bss_stop, (void *) INITRD_START, INITRD_SIZE); 387761cdf6aSHeiko Carstens INITRD_START = (unsigned long) __bss_stop; 388761cdf6aSHeiko Carstens #endif 389761cdf6aSHeiko Carstens } 390761cdf6aSHeiko Carstens 391a0443fbbSHendrik Brueckner /* Set up boot command line */ 392684d2fd4SHendrik Brueckner static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t)) 393684d2fd4SHendrik Brueckner { 394684d2fd4SHendrik Brueckner char *parm, *delim; 395684d2fd4SHendrik Brueckner size_t rc, len; 396684d2fd4SHendrik Brueckner 397684d2fd4SHendrik Brueckner len = strlen(boot_command_line); 398684d2fd4SHendrik Brueckner 399684d2fd4SHendrik Brueckner delim = boot_command_line + len; /* '\0' character position */ 400684d2fd4SHendrik Brueckner parm = boot_command_line + len + 1; /* append right after '\0' */ 401684d2fd4SHendrik Brueckner 402684d2fd4SHendrik Brueckner rc = ipl_data(parm, COMMAND_LINE_SIZE - len - 1); 403684d2fd4SHendrik Brueckner if (rc) { 404684d2fd4SHendrik Brueckner if (*parm == '=') 405684d2fd4SHendrik Brueckner memmove(boot_command_line, parm + 1, rc); 406684d2fd4SHendrik Brueckner else 407684d2fd4SHendrik Brueckner *delim = ' '; /* replace '\0' with space */ 408684d2fd4SHendrik Brueckner } 409684d2fd4SHendrik Brueckner } 410684d2fd4SHendrik Brueckner 411a0443fbbSHendrik Brueckner static void __init setup_boot_command_line(void) 412a0443fbbSHendrik Brueckner { 41361fd330dSMartin Schwidefsky int i; 41461fd330dSMartin Schwidefsky 41561fd330dSMartin Schwidefsky /* convert arch command line to ascii */ 41661fd330dSMartin Schwidefsky for (i = 0; i < ARCH_COMMAND_LINE_SIZE; i++) 41761fd330dSMartin Schwidefsky if (COMMAND_LINE[i] & 0x80) 41861fd330dSMartin Schwidefsky break; 41961fd330dSMartin Schwidefsky if (i < ARCH_COMMAND_LINE_SIZE) 42061fd330dSMartin Schwidefsky EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE); 42161fd330dSMartin Schwidefsky COMMAND_LINE[ARCH_COMMAND_LINE_SIZE-1] = 0; 42261fd330dSMartin Schwidefsky 423a0443fbbSHendrik Brueckner /* copy arch command line */ 42461fd330dSMartin Schwidefsky strlcpy(boot_command_line, strstrip(COMMAND_LINE), 42561fd330dSMartin Schwidefsky ARCH_COMMAND_LINE_SIZE); 426a0443fbbSHendrik Brueckner 427a0443fbbSHendrik Brueckner /* append IPL PARM data to the boot command line */ 428684d2fd4SHendrik Brueckner if (MACHINE_IS_VM) 429684d2fd4SHendrik Brueckner append_to_cmdline(append_ipl_vmparm); 430684d2fd4SHendrik Brueckner 431684d2fd4SHendrik Brueckner append_to_cmdline(append_ipl_scpdata); 432a0443fbbSHendrik Brueckner } 433a0443fbbSHendrik Brueckner 434a0443fbbSHendrik Brueckner 435ab14de6cSHeiko Carstens /* 436ab14de6cSHeiko Carstens * Save ipl parameters, clear bss memory, initialize storage keys 437ab14de6cSHeiko Carstens * and create a kernel NSS at startup if the SAVESYS= parm is defined 438ab14de6cSHeiko Carstens */ 439ab14de6cSHeiko Carstens void __init startup_init(void) 440ab14de6cSHeiko Carstens { 441b6112ccbSMartin Schwidefsky reset_tod_clock(); 442ab14de6cSHeiko Carstens ipl_save_parameters(); 443761cdf6aSHeiko Carstens rescue_initrd(); 444ab14de6cSHeiko Carstens clear_bss_section(); 445ab14de6cSHeiko Carstens init_kernel_storage_key(); 446ab14de6cSHeiko Carstens lockdep_init(); 447ab14de6cSHeiko Carstens lockdep_off(); 448ab14de6cSHeiko Carstens sort_main_extable(); 449ab14de6cSHeiko Carstens setup_lowcore_early(); 450a0443fbbSHendrik Brueckner detect_machine_type(); 451a0443fbbSHendrik Brueckner ipl_update_parameters(); 452a0443fbbSHendrik Brueckner setup_boot_command_line(); 453a0443fbbSHendrik Brueckner create_kernel_nss(); 4542e5061e4SHeiko Carstens detect_mvpg(); 4552e5061e4SHeiko Carstens detect_ieee(); 4562e5061e4SHeiko Carstens detect_csp(); 4572e5061e4SHeiko Carstens detect_diag9c(); 4582e5061e4SHeiko Carstens detect_diag44(); 4592e5061e4SHeiko Carstens detect_machine_facilities(); 46053492b1dSGerald Schaefer setup_hpage(); 46183119ad4SHeiko Carstens sclp_facilities_detect(); 46223d17421SHeiko Carstens detect_memory_layout(memory_chunk); 463dfd9f7abSHeiko Carstens #ifdef CONFIG_DYNAMIC_FTRACE 464dfd9f7abSHeiko Carstens S390_lowcore.ftrace_func = (unsigned long)ftrace_caller; 465dfd9f7abSHeiko Carstens #endif 466ab14de6cSHeiko Carstens lockdep_on(); 467ab14de6cSHeiko Carstens } 468