/* * S390 version * Copyright IBM Corp. 1999, 2012 * 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 */ #define KMSG_COMPONENT "setup"#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/errno.h>#include <linux/export.h>#include <linux/sched.h>#include <linux/sched/task.h>#include <linux/cpu.h>#include <linux/kernel.h>#include <linux/memblock.h>#include <linux/mm.h>#include <linux/stddef.h>#include <linux/unistd.h>#include <linux/ptrace.h>#include <linux/random.h>#include <linux/user.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/kernel_stat.h>#include <linux/dma-contiguous.h>#include <linux/device.h>#include <linux/notifier.h>#include <linux/pfn.h>#include <linux/ctype.h>#include <linux/reboot.h>#include <linux/topology.h>#include <linux/kexec.h>#include <linux/crash_dump.h>#include <linux/memory.h>#include <linux/compat.h> #include <asm/ipl.h>#include <asm/facility.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/kvm_virtio.h>#include <asm/diag.h>#include <asm/os_info.h>#include <asm/sclp.h>#include <asm/sysinfo.h>#include <asm/numa.h>#include "entry.h" /* * Machine setup.. */unsigned int console_mode = 0;EXPORT_SYMBOL(console_mode); unsigned int console_devno = -1;EXPORT_SYMBOL(console_devno); unsigned int console_irq = -1;EXPORT_SYMBOL(console_irq); unsigned long elf_hwcap __read_mostly = 0;char elf_platform[ELF_PLATFORM_SIZE]; unsigned long int_hwcap = 0; int __initdata memory_end_set;unsigned long __initdata memory_end;unsigned long __initdata max_physmem_end; unsigned long VMALLOC_START;EXPORT_SYMBOL(VMALLOC_START); unsigned long VMALLOC_END;EXPORT_SYMBOL(VMALLOC_END); struct page *vmemmap;EXPORT_SYMBOL(vmemmap); unsigned long MODULES_VADDR;unsigned long MODULES_END; /* An array with a pointer to the lowcore of every CPU. */struct lowcore *lowcore_ptr[NR_CPUS];EXPORT_SYMBOL(lowcore_ptr); /* * 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> /* * 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 void __init set_preferred_console(void){ if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) add_preferred_console("ttyS", 0, NULL); else if (CONSOLE_IS_3270) add_preferred_console("tty3270", 0, NULL); else if (CONSOLE_IS_VT220) add_preferred_console("ttyS", 1, NULL); else if (CONSOLE_IS_HVC) add_preferred_console("hvc", 0, NULL);} static int __init conmode_setup(char *str){#if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_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 set_preferred_console(); 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) || defined(CONFIG_SCLP_VT220_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) || defined(CONFIG_SCLP_VT220_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) || defined(CONFIG_SCLP_VT220_CONSOLE) SET_CONSOLE_SCLP;#endif } } else if (MACHINE_IS_KVM) { if (sclp.has_vt220 && IS_ENABLED(CONFIG_SCLP_VT220_CONSOLE)) SET_CONSOLE_VT220; else if (sclp.has_linemode && IS_ENABLED(CONFIG_SCLP_CONSOLE)) SET_CONSOLE_SCLP; else SET_CONSOLE_HVC; } else {#if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) SET_CONSOLE_SCLP;#endif }} #ifdef CONFIG_CRASH_DUMPstatic void __init setup_zfcpdump(void){ if (ipl_info.type != IPL_TYPE_FCP_DUMP) return; if (OLDMEM_BASE) return; strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev"); console_loglevel = 2;}#elsestatic inline void setup_zfcpdump(void) {}#endif /* CONFIG_CRASH_DUMP */ /* * 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() && !in_atomic()) || 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;EXPORT_SYMBOL_GPL(pm_power_off); static int __init early_parse_mem(char *p){ memory_end = memparse(p, &p); memory_end &= PAGE_MASK; memory_end_set = 1; return 0;}early_param("mem", early_parse_mem); static int __init parse_vmalloc(char *arg){ if (!arg) return -EINVAL; VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; return 0;}early_param("vmalloc", parse_vmalloc); void *restart_stack __section(.data); static void __init setup_lowcore(void){ struct lowcore *lc; /* * Setup lowcore for boot cpu */ BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * 4096); lc = memblock_virt_alloc_low(sizeof(*lc), sizeof(*lc)); lc->restart_psw.mask = PSW_KERNEL_BITS; lc->restart_psw.addr = (unsigned long) restart_int_handler; lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; lc->external_new_psw.addr = (unsigned long) ext_int_handler; lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; lc->svc_new_psw.addr = (unsigned long) system_call; lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; lc->program_new_psw.addr = (unsigned long) pgm_check_handler; lc->mcck_new_psw.mask = PSW_KERNEL_BITS; lc->mcck_new_psw.addr = (unsigned long) mcck_int_handler; lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; lc->io_new_psw.addr = (unsigned long) io_int_handler; lc->clock_comparator = -1ULL; lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); lc->async_stack = (unsigned long) memblock_virt_alloc(ASYNC_SIZE, ASYNC_SIZE) + ASYNC_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); lc->panic_stack = (unsigned long) memblock_virt_alloc(PAGE_SIZE, PAGE_SIZE) + PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); lc->current_task = (unsigned long)&init_task; lc->lpp = LPP_MAGIC; lc->machine_flags = S390_lowcore.machine_flags; lc->preempt_count = S390_lowcore.preempt_count; lc->stfl_fac_list = S390_lowcore.stfl_fac_list; memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, MAX_FACILITY_BIT/8); if (MACHINE_HAS_VX || MACHINE_HAS_GS) { unsigned long bits, size; bits = MACHINE_HAS_GS ? 11 : 10; size = 1UL << bits; lc->mcesad = (__u64) memblock_virt_alloc(size, size); if (MACHINE_HAS_GS) lc->mcesad |= bits; } lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; lc->sync_enter_timer = S390_lowcore.sync_enter_timer; lc->async_enter_timer = S390_lowcore.async_enter_timer; lc->exit_timer = S390_lowcore.exit_timer; lc->user_timer = S390_lowcore.user_timer; lc->system_timer = S390_lowcore.system_timer; lc->steal_timer = S390_lowcore.steal_timer; lc->last_update_timer = S390_lowcore.last_update_timer; lc->last_update_clock = S390_lowcore.last_update_clock; restart_stack = memblock_virt_alloc(ASYNC_SIZE, ASYNC_SIZE); restart_stack += ASYNC_SIZE; /* * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant * restart data to the absolute zero lowcore. This is necessary if * PSW restart is done on an offline CPU that has lowcore zero. */ lc->restart_stack = (unsigned long) restart_stack; lc->restart_fn = (unsigned long) do_restart; lc->restart_data = 0; lc->restart_source = -1UL; /* Setup absolute zero lowcore */ mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); #ifdef CONFIG_SMP lc->spinlock_lockval = arch_spin_lockval(0);#endif set_prefix((u32)(unsigned long) lc); lowcore_ptr[0] = lc;} static struct resource code_resource = { .name = "Kernel code", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,}; static struct resource data_resource = { .name = "Kernel data", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,}; static struct resource bss_resource = { .name = "Kernel bss", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,}; static struct resource __initdata *standard_resources[] = { &code_resource, &data_resource, &bss_resource,}; static void __init setup_resources(void){ struct resource *res, *std_res, *sub_res; struct memblock_region *reg; int j; code_resource.start = (unsigned long) &_text; code_resource.end = (unsigned long) &_etext - 1; data_resource.start = (unsigned long) &_etext; data_resource.end = (unsigned long) &_edata - 1; bss_resource.start = (unsigned long) &__bss_start; bss_resource.end = (unsigned long) &__bss_stop - 1; for_each_memblock(memory, reg) { res = memblock_virt_alloc(sizeof(*res), 8); res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM; res->name = "System RAM"; res->start = reg->base; res->end = reg->base + reg->size - 1; request_resource(&iomem_resource, res); for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { std_res = standard_resources[j]; if (std_res->start < res->start || std_res->start > res->end) continue; if (std_res->end > res->end) { sub_res = memblock_virt_alloc(sizeof(*sub_res), 8); *sub_res = *std_res; sub_res->end = res->end; std_res->start = res->end + 1; request_resource(res, sub_res); } else { request_resource(res, std_res); } } }#ifdef CONFIG_CRASH_DUMP /* * Re-add removed crash kernel memory as reserved memory. This makes * sure it will be mapped with the identity mapping and struct pages * will be created, so it can be resized later on. * However add it later since the crash kernel resource should not be * part of the System RAM resource. */ if (crashk_res.end) { memblock_add_node(crashk_res.start, resource_size(&crashk_res), 0); memblock_reserve(crashk_res.start, resource_size(&crashk_res)); insert_resource(&iomem_resource, &crashk_res); }#endif} static void __init setup_memory_end(void){ unsigned long vmax, vmalloc_size, tmp; /* Choose kernel address space layout: 2, 3, or 4 levels. */ vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN; tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE; tmp = tmp * (sizeof(struct page) + PAGE_SIZE); if (tmp + vmalloc_size + MODULES_LEN <= (1UL << 42)) vmax = 1UL << 42; /* 3-level kernel page table */ else vmax = 1UL << 53; /* 4-level kernel page table */ /* module area is at the end of the kernel address space. */ MODULES_END = vmax; MODULES_VADDR = MODULES_END - MODULES_LEN; VMALLOC_END = MODULES_VADDR; VMALLOC_START = vmax - vmalloc_size; /* Split remaining virtual space between 1:1 mapping & vmemmap array */ tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); /* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */ tmp = SECTION_ALIGN_UP(tmp); tmp = VMALLOC_START - tmp * sizeof(struct page); tmp &= ~((vmax >> 11) - 1); /* align to page table level */ tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); vmemmap = (struct page *) tmp; /* Take care that memory_end is set and <= vmemmap */ memory_end = min(memory_end ?: max_physmem_end, tmp); max_pfn = max_low_pfn = PFN_DOWN(memory_end); memblock_remove(memory_end, ULONG_MAX); pr_notice("The maximum memory size is %luMB\n", memory_end >> 20);} #ifdef CONFIG_CRASH_DUMP Lines 1–500 of 959. 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/* * S390 version * Copyright IBM Corp. 1999, 2012 * 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 */ #define KMSG_COMPONENT "setup" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/errno.h> #include <linux/export.h> #include <linux/sched.h> #include <linux/sched/task.h> #include <linux/cpu.h> #include <linux/kernel.h> #include <linux/memblock.h> #include <linux/mm.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> #include <linux/random.h> #include <linux/user.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/kernel_stat.h> #include <linux/dma-contiguous.h> #include <linux/device.h> #include <linux/notifier.h> #include <linux/pfn.h> #include <linux/ctype.h> #include <linux/reboot.h> #include <linux/topology.h> #include <linux/kexec.h> #include <linux/crash_dump.h> #include <linux/memory.h> #include <linux/compat.h> #include <asm/ipl.h> #include <asm/facility.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/kvm_virtio.h> #include <asm/diag.h> #include <asm/os_info.h> #include <asm/sclp.h> #include <asm/sysinfo.h> #include <asm/numa.h> #include "entry.h" /* * Machine setup.. */ unsigned int console_mode = 0; EXPORT_SYMBOL(console_mode); unsigned int console_devno = -1; EXPORT_SYMBOL(console_devno); unsigned int console_irq = -1; EXPORT_SYMBOL(console_irq); unsigned long elf_hwcap __read_mostly = 0; char elf_platform[ELF_PLATFORM_SIZE]; unsigned long int_hwcap = 0; int __initdata memory_end_set; unsigned long __initdata memory_end; unsigned long __initdata max_physmem_end; unsigned long VMALLOC_START; EXPORT_SYMBOL(VMALLOC_START); unsigned long VMALLOC_END; EXPORT_SYMBOL(VMALLOC_END); struct page *vmemmap; EXPORT_SYMBOL(vmemmap); unsigned long MODULES_VADDR; unsigned long MODULES_END; /* An array with a pointer to the lowcore of every CPU. */ struct lowcore *lowcore_ptr[NR_CPUS]; EXPORT_SYMBOL(lowcore_ptr); /* * 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> /* * 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 void __init set_preferred_console(void) { if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) add_preferred_console("ttyS", 0, NULL); else if (CONSOLE_IS_3270) add_preferred_console("tty3270", 0, NULL); else if (CONSOLE_IS_VT220) add_preferred_console("ttyS", 1, NULL); else if (CONSOLE_IS_HVC) add_preferred_console("hvc", 0, NULL); } static int __init conmode_setup(char *str) { #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_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 set_preferred_console(); 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) || defined(CONFIG_SCLP_VT220_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) || defined(CONFIG_SCLP_VT220_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) || defined(CONFIG_SCLP_VT220_CONSOLE) SET_CONSOLE_SCLP; #endif } } else if (MACHINE_IS_KVM) { if (sclp.has_vt220 && IS_ENABLED(CONFIG_SCLP_VT220_CONSOLE)) SET_CONSOLE_VT220; else if (sclp.has_linemode && IS_ENABLED(CONFIG_SCLP_CONSOLE)) SET_CONSOLE_SCLP; else SET_CONSOLE_HVC; } else { #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) SET_CONSOLE_SCLP; #endif } } #ifdef CONFIG_CRASH_DUMP static void __init setup_zfcpdump(void) { if (ipl_info.type != IPL_TYPE_FCP_DUMP) return; if (OLDMEM_BASE) return; strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev"); console_loglevel = 2; } #else static inline void setup_zfcpdump(void) {} #endif /* CONFIG_CRASH_DUMP */ /* * 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() && !in_atomic()) || 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; EXPORT_SYMBOL_GPL(pm_power_off); static int __init early_parse_mem(char *p) { memory_end = memparse(p, &p); memory_end &= PAGE_MASK; memory_end_set = 1; return 0; } early_param("mem", early_parse_mem); static int __init parse_vmalloc(char *arg) { if (!arg) return -EINVAL; VMALLOC_END = (memparse(arg, &arg) + PAGE_SIZE - 1) & PAGE_MASK; return 0; } early_param("vmalloc", parse_vmalloc); void *restart_stack __section(.data); static void __init setup_lowcore(void) { struct lowcore *lc; /* * Setup lowcore for boot cpu */ BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * 4096); lc = memblock_virt_alloc_low(sizeof(*lc), sizeof(*lc)); lc->restart_psw.mask = PSW_KERNEL_BITS; lc->restart_psw.addr = (unsigned long) restart_int_handler; lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; lc->external_new_psw.addr = (unsigned long) ext_int_handler; lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; lc->svc_new_psw.addr = (unsigned long) system_call; lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; lc->program_new_psw.addr = (unsigned long) pgm_check_handler; lc->mcck_new_psw.mask = PSW_KERNEL_BITS; lc->mcck_new_psw.addr = (unsigned long) mcck_int_handler; lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; lc->io_new_psw.addr = (unsigned long) io_int_handler; lc->clock_comparator = -1ULL; lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); lc->async_stack = (unsigned long) memblock_virt_alloc(ASYNC_SIZE, ASYNC_SIZE) + ASYNC_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); lc->panic_stack = (unsigned long) memblock_virt_alloc(PAGE_SIZE, PAGE_SIZE) + PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs); lc->current_task = (unsigned long)&init_task; lc->lpp = LPP_MAGIC; lc->machine_flags = S390_lowcore.machine_flags; lc->preempt_count = S390_lowcore.preempt_count; lc->stfl_fac_list = S390_lowcore.stfl_fac_list; memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, MAX_FACILITY_BIT/8); if (MACHINE_HAS_VX || MACHINE_HAS_GS) { unsigned long bits, size; bits = MACHINE_HAS_GS ? 11 : 10; size = 1UL << bits; lc->mcesad = (__u64) memblock_virt_alloc(size, size); if (MACHINE_HAS_GS) lc->mcesad |= bits; } lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; lc->sync_enter_timer = S390_lowcore.sync_enter_timer; lc->async_enter_timer = S390_lowcore.async_enter_timer; lc->exit_timer = S390_lowcore.exit_timer; lc->user_timer = S390_lowcore.user_timer; lc->system_timer = S390_lowcore.system_timer; lc->steal_timer = S390_lowcore.steal_timer; lc->last_update_timer = S390_lowcore.last_update_timer; lc->last_update_clock = S390_lowcore.last_update_clock; restart_stack = memblock_virt_alloc(ASYNC_SIZE, ASYNC_SIZE); restart_stack += ASYNC_SIZE; /* * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant * restart data to the absolute zero lowcore. This is necessary if * PSW restart is done on an offline CPU that has lowcore zero. */ lc->restart_stack = (unsigned long) restart_stack; lc->restart_fn = (unsigned long) do_restart; lc->restart_data = 0; lc->restart_source = -1UL; /* Setup absolute zero lowcore */ mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack); mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn); mem_assign_absolute(S390_lowcore.restart_data, lc->restart_data); mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); #ifdef CONFIG_SMP lc->spinlock_lockval = arch_spin_lockval(0); #endif set_prefix((u32)(unsigned long) lc); lowcore_ptr[0] = lc; } static struct resource code_resource = { .name = "Kernel code", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, }; static struct resource data_resource = { .name = "Kernel data", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, }; static struct resource bss_resource = { .name = "Kernel bss", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, }; static struct resource __initdata *standard_resources[] = { &code_resource, &data_resource, &bss_resource, }; static void __init setup_resources(void) { struct resource *res, *std_res, *sub_res; struct memblock_region *reg; int j; code_resource.start = (unsigned long) &_text; code_resource.end = (unsigned long) &_etext - 1; data_resource.start = (unsigned long) &_etext; data_resource.end = (unsigned long) &_edata - 1; bss_resource.start = (unsigned long) &__bss_start; bss_resource.end = (unsigned long) &__bss_stop - 1; for_each_memblock(memory, reg) { res = memblock_virt_alloc(sizeof(*res), 8); res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM; res->name = "System RAM"; res->start = reg->base; res->end = reg->base + reg->size - 1; request_resource(&iomem_resource, res); for (j = 0; j < ARRAY_SIZE(standard_resources); j++) { std_res = standard_resources[j]; if (std_res->start < res->start || std_res->start > res->end) continue; if (std_res->end > res->end) { sub_res = memblock_virt_alloc(sizeof(*sub_res), 8); *sub_res = *std_res; sub_res->end = res->end; std_res->start = res->end + 1; request_resource(res, sub_res); } else { request_resource(res, std_res); } } } #ifdef CONFIG_CRASH_DUMP /* * Re-add removed crash kernel memory as reserved memory. This makes * sure it will be mapped with the identity mapping and struct pages * will be created, so it can be resized later on. * However add it later since the crash kernel resource should not be * part of the System RAM resource. */ if (crashk_res.end) { memblock_add_node(crashk_res.start, resource_size(&crashk_res), 0); memblock_reserve(crashk_res.start, resource_size(&crashk_res)); insert_resource(&iomem_resource, &crashk_res); } #endif } static void __init setup_memory_end(void) { unsigned long vmax, vmalloc_size, tmp; /* Choose kernel address space layout: 2, 3, or 4 levels. */ vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN; tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE; tmp = tmp * (sizeof(struct page) + PAGE_SIZE); if (tmp + vmalloc_size + MODULES_LEN <= (1UL << 42)) vmax = 1UL << 42; /* 3-level kernel page table */ else vmax = 1UL << 53; /* 4-level kernel page table */ /* module area is at the end of the kernel address space. */ MODULES_END = vmax; MODULES_VADDR = MODULES_END - MODULES_LEN; VMALLOC_END = MODULES_VADDR; VMALLOC_START = vmax - vmalloc_size; /* Split remaining virtual space between 1:1 mapping & vmemmap array */ tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); /* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */ tmp = SECTION_ALIGN_UP(tmp); tmp = VMALLOC_START - tmp * sizeof(struct page); tmp &= ~((vmax >> 11) - 1); /* align to page table level */ tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); vmemmap = (struct page *) tmp; /* Take care that memory_end is set and <= vmemmap */ memory_end = min(memory_end ?: max_physmem_end, tmp); max_pfn = max_low_pfn = PFN_DOWN(memory_end); memblock_remove(memory_end, ULONG_MAX); pr_notice("The maximum memory size is %luMB\n", memory_end >> 20); } #ifdef CONFIG_CRASH_DUMP