/* * arch/s390/kernel/setup.c * * S390 version * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation * Author(s): Hartmut Penner (hp@de.ibm.com), * Martin Schwidefsky (schwidefsky@de.ibm.com) * * Derived from "arch/i386/kernel/setup.c" * Copyright (C) 1995, Linus Torvalds */ /* * This file handles the architecture-dependent parts of initialization */ #include <linux/errno.h>#include <linux/module.h>#include <linux/sched.h>#include <linux/kernel.h>#include <linux/mm.h>#include <linux/stddef.h>#include <linux/unistd.h>#include <linux/ptrace.h>#include <linux/slab.h>#include <linux/user.h>#include <linux/a.out.h>#include <linux/tty.h>#include <linux/ioport.h>#include <linux/delay.h>#include <linux/init.h>#include <linux/initrd.h>#include <linux/bootmem.h>#include <linux/root_dev.h>#include <linux/console.h>#include <linux/seq_file.h>#include <linux/kernel_stat.h>#include <linux/device.h>#include <linux/notifier.h>#include <linux/pfn.h>#include <linux/ctype.h>#include <linux/reboot.h> #include <asm/ipl.h>#include <asm/uaccess.h>#include <asm/system.h>#include <asm/smp.h>#include <asm/mmu_context.h>#include <asm/cpcmd.h>#include <asm/lowcore.h>#include <asm/irq.h>#include <asm/page.h>#include <asm/ptrace.h>#include <asm/sections.h>#include <asm/ebcdic.h>#include <asm/compat.h> long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | PSW_MASK_MCHECK | PSW_DEFAULT_KEY);long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); /* * User copy operations. */struct uaccess_ops uaccess;EXPORT_SYMBOL_GPL(uaccess); /* * Machine setup.. */unsigned int console_mode = 0;unsigned int console_devno = -1;unsigned int console_irq = -1;unsigned long machine_flags = 0; struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS];volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */static unsigned long __initdata memory_end; /* * This is set up by the setup-routine at boot-time * for S390 need to find out, what we have to setup * using address 0x10400 ... */ #include <asm/setup.h> static struct resource code_resource = { .name = "Kernel code", .flags = IORESOURCE_BUSY | IORESOURCE_MEM,}; static struct resource data_resource = { .name = "Kernel data", .flags = IORESOURCE_BUSY | IORESOURCE_MEM,}; /* * cpu_init() initializes state that is per-CPU. */void __devinit cpu_init (void){ int addr = hard_smp_processor_id(); /* * Store processor id in lowcore (used e.g. in timer_interrupt) */ get_cpu_id(&S390_lowcore.cpu_data.cpu_id); S390_lowcore.cpu_data.cpu_addr = addr; /* * Force FPU initialization: */ clear_thread_flag(TIF_USEDFPU); clear_used_math(); atomic_inc(&init_mm.mm_count); current->active_mm = &init_mm; if (current->mm) BUG(); enter_lazy_tlb(&init_mm, current);} /* * VM halt and poweroff setup routines */char vmhalt_cmd[128] = "";char vmpoff_cmd[128] = "";static char vmpanic_cmd[128] = ""; static void strncpy_skip_quote(char *dst, char *src, int n){ int sx, dx; dx = 0; for (sx = 0; src[sx] != 0; sx++) { if (src[sx] == '"') continue; dst[dx++] = src[sx]; if (dx >= n) break; }} static int __init vmhalt_setup(char *str){ strncpy_skip_quote(vmhalt_cmd, str, 127); vmhalt_cmd[127] = 0; return 1;} __setup("vmhalt=", vmhalt_setup); static int __init vmpoff_setup(char *str){ strncpy_skip_quote(vmpoff_cmd, str, 127); vmpoff_cmd[127] = 0; return 1;} __setup("vmpoff=", vmpoff_setup); static int vmpanic_notify(struct notifier_block *self, unsigned long event, void *data){ if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) cpcmd(vmpanic_cmd, NULL, 0, NULL); return NOTIFY_OK;} #define PANIC_PRI_VMPANIC 0 static struct notifier_block vmpanic_nb = { .notifier_call = vmpanic_notify, .priority = PANIC_PRI_VMPANIC}; static int __init vmpanic_setup(char *str){ static int register_done __initdata = 0; strncpy_skip_quote(vmpanic_cmd, str, 127); vmpanic_cmd[127] = 0; if (!register_done) { register_done = 1; atomic_notifier_chain_register(&panic_notifier_list, &vmpanic_nb); } return 1;} __setup("vmpanic=", vmpanic_setup); /* * condev= and conmode= setup parameter. */ static int __init condev_setup(char *str){ int vdev; vdev = simple_strtoul(str, &str, 0); if (vdev >= 0 && vdev < 65536) { console_devno = vdev; console_irq = -1; } return 1;} __setup("condev=", condev_setup); static int __init conmode_setup(char *str){#if defined(CONFIG_SCLP_CONSOLE) if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) SET_CONSOLE_SCLP;#endif#if defined(CONFIG_TN3215_CONSOLE) if (strncmp(str, "3215", 5) == 0) SET_CONSOLE_3215;#endif#if defined(CONFIG_TN3270_CONSOLE) if (strncmp(str, "3270", 5) == 0) SET_CONSOLE_3270;#endif return 1;} __setup("conmode=", conmode_setup); static void __init conmode_default(void){ char query_buffer[1024]; char *ptr; if (MACHINE_IS_VM) { cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); console_devno = simple_strtoul(query_buffer + 5, NULL, 16); ptr = strstr(query_buffer, "SUBCHANNEL ="); console_irq = simple_strtoul(ptr + 13, NULL, 16); cpcmd("QUERY TERM", query_buffer, 1024, NULL); ptr = strstr(query_buffer, "CONMODE"); /* * Set the conmode to 3215 so that the device recognition * will set the cu_type of the console to 3215. If the * conmode is 3270 and we don't set it back then both * 3215 and the 3270 driver will try to access the console * device (3215 as console and 3270 as normal tty). */ cpcmd("TERM CONMODE 3215", NULL, 0, NULL); if (ptr == NULL) {#if defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP;#endif return; } if (strncmp(ptr + 8, "3270", 4) == 0) {#if defined(CONFIG_TN3270_CONSOLE) SET_CONSOLE_3270;#elif defined(CONFIG_TN3215_CONSOLE) SET_CONSOLE_3215;#elif defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP;#endif } else if (strncmp(ptr + 8, "3215", 4) == 0) {#if defined(CONFIG_TN3215_CONSOLE) SET_CONSOLE_3215;#elif defined(CONFIG_TN3270_CONSOLE) SET_CONSOLE_3270;#elif defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP;#endif } } else if (MACHINE_IS_P390) {#if defined(CONFIG_TN3215_CONSOLE) SET_CONSOLE_3215;#elif defined(CONFIG_TN3270_CONSOLE) SET_CONSOLE_3270;#endif } else {#if defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP;#endif }} #ifdef CONFIG_SMPvoid (*_machine_restart)(char *command) = machine_restart_smp;void (*_machine_halt)(void) = machine_halt_smp;void (*_machine_power_off)(void) = machine_power_off_smp;#else/* * Reboot, halt and power_off routines for non SMP. */static void do_machine_restart_nonsmp(char * __unused){ do_reipl();} static void do_machine_halt_nonsmp(void){ if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) __cpcmd(vmhalt_cmd, NULL, 0, NULL); signal_processor(smp_processor_id(), sigp_stop_and_store_status);} static void do_machine_power_off_nonsmp(void){ if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) __cpcmd(vmpoff_cmd, NULL, 0, NULL); signal_processor(smp_processor_id(), sigp_stop_and_store_status);} void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;void (*_machine_halt)(void) = do_machine_halt_nonsmp;void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;#endif /* * Reboot, halt and power_off stubs. They just call _machine_restart, * _machine_halt or _machine_power_off. */ void machine_restart(char *command){ if (!in_interrupt() || oops_in_progress) /* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); _machine_restart(command);} void machine_halt(void){ if (!in_interrupt() || oops_in_progress) /* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); _machine_halt();} void machine_power_off(void){ if (!in_interrupt() || oops_in_progress) /* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); _machine_power_off();} /* * Dummy power off function. */void (*pm_power_off)(void) = machine_power_off; static int __init early_parse_mem(char *p){ memory_end = memparse(p, &p); return 0;}early_param("mem", early_parse_mem); /* * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes */static int __init early_parse_ipldelay(char *p){ unsigned long delay = 0; delay = simple_strtoul(p, &p, 0); switch (*p) { case 's': case 'S': delay *= 1000000; break; case 'm': case 'M': delay *= 60 * 1000000; } /* now wait for the requested amount of time */ udelay(delay); return 0;}early_param("ipldelay", early_parse_ipldelay); #ifdef CONFIG_S390_SWITCH_AMODEunsigned int switch_amode = 0;EXPORT_SYMBOL_GPL(switch_amode); static void set_amode_and_uaccess(unsigned long user_amode, unsigned long user32_amode){ psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_DEFAULT_KEY;#ifdef CONFIG_COMPAT psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | PSW32_MASK_PSTATE;#endif psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; if (MACHINE_HAS_MVCOS) { printk("mvcos available.\n"); memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); } else { printk("mvcos not available.\n"); memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); }} /* * Switch kernel/user addressing modes? */static int __init early_parse_switch_amode(char *p){ switch_amode = 1; return 0;}early_param("switch_amode", early_parse_switch_amode); #else /* CONFIG_S390_SWITCH_AMODE */static inline void set_amode_and_uaccess(unsigned long user_amode, unsigned long user32_amode){}#endif /* CONFIG_S390_SWITCH_AMODE */ #ifdef CONFIG_S390_EXEC_PROTECTunsigned int s390_noexec = 0;EXPORT_SYMBOL_GPL(s390_noexec); /* * Enable execute protection? */static int __init early_parse_noexec(char *p){ if (!strncmp(p, "off", 3)) return 0; switch_amode = 1; s390_noexec = 1; return 0;}early_param("noexec", early_parse_noexec);#endif /* CONFIG_S390_EXEC_PROTECT */ static void setup_addressing_mode(void){ if (s390_noexec) { printk("S390 execute protection active, "); set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY); return; } if (switch_amode) { printk("S390 address spaces switched, "); set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY); }} static void __initsetup_lowcore(void){ struct _lowcore *lc; int lc_pages; /* * Setup lowcore for boot cpu */ lc_pages = sizeof(void *) == 8 ? 2 : 1; lc = (struct _lowcore *) __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); memset(lc, 0, lc_pages * PAGE_SIZE); lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; lc->restart_psw.addr = PSW_ADDR_AMODE | (unsigned long) restart_int_handler; if (switch_amode) lc->restart_psw.mask |= PSW_ASC_HOME; lc->external_new_psw.mask = psw_kernel_bits; lc->external_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) ext_int_handler; lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; lc->program_new_psw.mask = psw_kernel_bits; lc->program_new_psw.addr = PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; lc->mcck_new_psw.mask =Lines 1–500 of 861. Load more
/* * arch/s390/kernel/setup.c * * S390 version * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation * Author(s): Hartmut Penner (hp@de.ibm.com), * Martin Schwidefsky (schwidefsky@de.ibm.com) * * Derived from "arch/i386/kernel/setup.c" * Copyright (C) 1995, Linus Torvalds */ /* * This file handles the architecture-dependent parts of initialization */ #include <linux/errno.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/user.h> #include <linux/a.out.h> #include <linux/tty.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/initrd.h> #include <linux/bootmem.h> #include <linux/root_dev.h> #include <linux/console.h> #include <linux/seq_file.h> #include <linux/kernel_stat.h> #include <linux/device.h> #include <linux/notifier.h> #include <linux/pfn.h> #include <linux/ctype.h> #include <linux/reboot.h> #include <asm/ipl.h> #include <asm/uaccess.h> #include <asm/system.h> #include <asm/smp.h> #include <asm/mmu_context.h> #include <asm/cpcmd.h> #include <asm/lowcore.h> #include <asm/irq.h> #include <asm/page.h> #include <asm/ptrace.h> #include <asm/sections.h> #include <asm/ebcdic.h> #include <asm/compat.h> long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | PSW_MASK_MCHECK | PSW_DEFAULT_KEY); long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); /* * User copy operations. */ struct uaccess_ops uaccess; EXPORT_SYMBOL_GPL(uaccess); /* * Machine setup.. */ unsigned int console_mode = 0; unsigned int console_devno = -1; unsigned int console_irq = -1; unsigned long machine_flags = 0; struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ static unsigned long __initdata memory_end; /* * This is set up by the setup-routine at boot-time * for S390 need to find out, what we have to setup * using address 0x10400 ... */ #include <asm/setup.h> static struct resource code_resource = { .name = "Kernel code", .flags = IORESOURCE_BUSY | IORESOURCE_MEM, }; static struct resource data_resource = { .name = "Kernel data", .flags = IORESOURCE_BUSY | IORESOURCE_MEM, }; /* * cpu_init() initializes state that is per-CPU. */ void __devinit cpu_init (void) { int addr = hard_smp_processor_id(); /* * Store processor id in lowcore (used e.g. in timer_interrupt) */ get_cpu_id(&S390_lowcore.cpu_data.cpu_id); S390_lowcore.cpu_data.cpu_addr = addr; /* * Force FPU initialization: */ clear_thread_flag(TIF_USEDFPU); clear_used_math(); atomic_inc(&init_mm.mm_count); current->active_mm = &init_mm; if (current->mm) BUG(); enter_lazy_tlb(&init_mm, current); } /* * VM halt and poweroff setup routines */ char vmhalt_cmd[128] = ""; char vmpoff_cmd[128] = ""; static char vmpanic_cmd[128] = ""; static void strncpy_skip_quote(char *dst, char *src, int n) { int sx, dx; dx = 0; for (sx = 0; src[sx] != 0; sx++) { if (src[sx] == '"') continue; dst[dx++] = src[sx]; if (dx >= n) break; } } static int __init vmhalt_setup(char *str) { strncpy_skip_quote(vmhalt_cmd, str, 127); vmhalt_cmd[127] = 0; return 1; } __setup("vmhalt=", vmhalt_setup); static int __init vmpoff_setup(char *str) { strncpy_skip_quote(vmpoff_cmd, str, 127); vmpoff_cmd[127] = 0; return 1; } __setup("vmpoff=", vmpoff_setup); static int vmpanic_notify(struct notifier_block *self, unsigned long event, void *data) { if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) cpcmd(vmpanic_cmd, NULL, 0, NULL); return NOTIFY_OK; } #define PANIC_PRI_VMPANIC 0 static struct notifier_block vmpanic_nb = { .notifier_call = vmpanic_notify, .priority = PANIC_PRI_VMPANIC }; static int __init vmpanic_setup(char *str) { static int register_done __initdata = 0; strncpy_skip_quote(vmpanic_cmd, str, 127); vmpanic_cmd[127] = 0; if (!register_done) { register_done = 1; atomic_notifier_chain_register(&panic_notifier_list, &vmpanic_nb); } return 1; } __setup("vmpanic=", vmpanic_setup); /* * condev= and conmode= setup parameter. */ static int __init condev_setup(char *str) { int vdev; vdev = simple_strtoul(str, &str, 0); if (vdev >= 0 && vdev < 65536) { console_devno = vdev; console_irq = -1; } return 1; } __setup("condev=", condev_setup); static int __init conmode_setup(char *str) { #if defined(CONFIG_SCLP_CONSOLE) if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) SET_CONSOLE_SCLP; #endif #if defined(CONFIG_TN3215_CONSOLE) if (strncmp(str, "3215", 5) == 0) SET_CONSOLE_3215; #endif #if defined(CONFIG_TN3270_CONSOLE) if (strncmp(str, "3270", 5) == 0) SET_CONSOLE_3270; #endif return 1; } __setup("conmode=", conmode_setup); static void __init conmode_default(void) { char query_buffer[1024]; char *ptr; if (MACHINE_IS_VM) { cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); console_devno = simple_strtoul(query_buffer + 5, NULL, 16); ptr = strstr(query_buffer, "SUBCHANNEL ="); console_irq = simple_strtoul(ptr + 13, NULL, 16); cpcmd("QUERY TERM", query_buffer, 1024, NULL); ptr = strstr(query_buffer, "CONMODE"); /* * Set the conmode to 3215 so that the device recognition * will set the cu_type of the console to 3215. If the * conmode is 3270 and we don't set it back then both * 3215 and the 3270 driver will try to access the console * device (3215 as console and 3270 as normal tty). */ cpcmd("TERM CONMODE 3215", NULL, 0, NULL); if (ptr == NULL) { #if defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP; #endif return; } if (strncmp(ptr + 8, "3270", 4) == 0) { #if defined(CONFIG_TN3270_CONSOLE) SET_CONSOLE_3270; #elif defined(CONFIG_TN3215_CONSOLE) SET_CONSOLE_3215; #elif defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP; #endif } else if (strncmp(ptr + 8, "3215", 4) == 0) { #if defined(CONFIG_TN3215_CONSOLE) SET_CONSOLE_3215; #elif defined(CONFIG_TN3270_CONSOLE) SET_CONSOLE_3270; #elif defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP; #endif } } else if (MACHINE_IS_P390) { #if defined(CONFIG_TN3215_CONSOLE) SET_CONSOLE_3215; #elif defined(CONFIG_TN3270_CONSOLE) SET_CONSOLE_3270; #endif } else { #if defined(CONFIG_SCLP_CONSOLE) SET_CONSOLE_SCLP; #endif } } #ifdef CONFIG_SMP void (*_machine_restart)(char *command) = machine_restart_smp; void (*_machine_halt)(void) = machine_halt_smp; void (*_machine_power_off)(void) = machine_power_off_smp; #else /* * Reboot, halt and power_off routines for non SMP. */ static void do_machine_restart_nonsmp(char * __unused) { do_reipl(); } static void do_machine_halt_nonsmp(void) { if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) __cpcmd(vmhalt_cmd, NULL, 0, NULL); signal_processor(smp_processor_id(), sigp_stop_and_store_status); } static void do_machine_power_off_nonsmp(void) { if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) __cpcmd(vmpoff_cmd, NULL, 0, NULL); signal_processor(smp_processor_id(), sigp_stop_and_store_status); } void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; void (*_machine_halt)(void) = do_machine_halt_nonsmp; void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; #endif /* * Reboot, halt and power_off stubs. They just call _machine_restart, * _machine_halt or _machine_power_off. */ void machine_restart(char *command) { if (!in_interrupt() || oops_in_progress) /* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); _machine_restart(command); } void machine_halt(void) { if (!in_interrupt() || oops_in_progress) /* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); _machine_halt(); } void machine_power_off(void) { if (!in_interrupt() || oops_in_progress) /* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); _machine_power_off(); } /* * Dummy power off function. */ void (*pm_power_off)(void) = machine_power_off; static int __init early_parse_mem(char *p) { memory_end = memparse(p, &p); return 0; } early_param("mem", early_parse_mem); /* * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes */ static int __init early_parse_ipldelay(char *p) { unsigned long delay = 0; delay = simple_strtoul(p, &p, 0); switch (*p) { case 's': case 'S': delay *= 1000000; break; case 'm': case 'M': delay *= 60 * 1000000; } /* now wait for the requested amount of time */ udelay(delay); return 0; } early_param("ipldelay", early_parse_ipldelay); #ifdef CONFIG_S390_SWITCH_AMODE unsigned int switch_amode = 0; EXPORT_SYMBOL_GPL(switch_amode); static void set_amode_and_uaccess(unsigned long user_amode, unsigned long user32_amode) { psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; #ifdef CONFIG_COMPAT psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_DEFAULT_KEY; psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | PSW32_MASK_PSTATE; #endif psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | PSW_MASK_MCHECK | PSW_DEFAULT_KEY; if (MACHINE_HAS_MVCOS) { printk("mvcos available.\n"); memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); } else { printk("mvcos not available.\n"); memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); } } /* * Switch kernel/user addressing modes? */ static int __init early_parse_switch_amode(char *p) { switch_amode = 1; return 0; } early_param("switch_amode", early_parse_switch_amode); #else /* CONFIG_S390_SWITCH_AMODE */ static inline void set_amode_and_uaccess(unsigned long user_amode, unsigned long user32_amode) { } #endif /* CONFIG_S390_SWITCH_AMODE */ #ifdef CONFIG_S390_EXEC_PROTECT unsigned int s390_noexec = 0; EXPORT_SYMBOL_GPL(s390_noexec); /* * Enable execute protection? */ static int __init early_parse_noexec(char *p) { if (!strncmp(p, "off", 3)) return 0; switch_amode = 1; s390_noexec = 1; return 0; } early_param("noexec", early_parse_noexec); #endif /* CONFIG_S390_EXEC_PROTECT */ static void setup_addressing_mode(void) { if (s390_noexec) { printk("S390 execute protection active, "); set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY); return; } if (switch_amode) { printk("S390 address spaces switched, "); set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY); } } static void __init setup_lowcore(void) { struct _lowcore *lc; int lc_pages; /* * Setup lowcore for boot cpu */ lc_pages = sizeof(void *) == 8 ? 2 : 1; lc = (struct _lowcore *) __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); memset(lc, 0, lc_pages * PAGE_SIZE); lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; lc->restart_psw.addr = PSW_ADDR_AMODE | (unsigned long) restart_int_handler; if (switch_amode) lc->restart_psw.mask |= PSW_ASC_HOME; lc->external_new_psw.mask = psw_kernel_bits; lc->external_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) ext_int_handler; lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT; lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; lc->program_new_psw.mask = psw_kernel_bits; lc->program_new_psw.addr = PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; lc->mcck_new_psw.mask =