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arch/s390/kernel/setup.c
28.7 KB
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/* * arch/s390/kernel/setup.c * * S390 version |
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* Copyright (C) IBM Corp. 1999,2010 |
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* 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 */ |
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#define KMSG_COMPONENT "setup" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
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#include <linux/errno.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/kernel.h> |
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#include <linux/memblock.h> |
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#include <linux/mm.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> |
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#include <linux/user.h> |
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#include <linux/tty.h> #include <linux/ioport.h> #include <linux/delay.h> |
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#include <linux/init.h> #include <linux/initrd.h> #include <linux/bootmem.h> #include <linux/root_dev.h> #include <linux/console.h> |
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#include <linux/kernel_stat.h> |
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#include <linux/device.h> |
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#include <linux/notifier.h> |
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#include <linux/pfn.h> |
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#include <linux/ctype.h> |
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#include <linux/reboot.h> |
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#include <linux/topology.h> |
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#include <linux/ftrace.h> |
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#include <linux/kexec.h> #include <linux/crash_dump.h> #include <linux/memory.h> |
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|
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#include <asm/ipl.h> |
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#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> |
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#include <asm/page.h> #include <asm/ptrace.h> |
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#include <asm/sections.h> |
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#include <asm/ebcdic.h> |
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#include <asm/compat.h> |
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#include <asm/kvm_virtio.h> |
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#include <asm/diag.h> |
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|
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long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY | PSW_MASK_EA | PSW_MASK_BA; long psw_user_bits = PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_ASC_HOME; |
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/* |
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* User copy operations. */ struct uaccess_ops uaccess; |
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EXPORT_SYMBOL(uaccess); |
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/* |
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* Machine setup.. */ unsigned int console_mode = 0; |
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EXPORT_SYMBOL(console_mode); |
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unsigned int console_devno = -1; |
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EXPORT_SYMBOL(console_devno); |
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unsigned int console_irq = -1; |
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EXPORT_SYMBOL(console_irq); |
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unsigned long elf_hwcap = 0; char elf_platform[ELF_PLATFORM_SIZE]; |
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|
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struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS]; |
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int __initdata memory_end_set; unsigned long __initdata memory_end; |
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|
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unsigned long VMALLOC_START; EXPORT_SYMBOL(VMALLOC_START); unsigned long VMALLOC_END; EXPORT_SYMBOL(VMALLOC_END); struct page *vmemmap; EXPORT_SYMBOL(vmemmap); |
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/* An array with a pointer to the lowcore of every CPU. */ struct _lowcore *lowcore_ptr[NR_CPUS]; EXPORT_SYMBOL(lowcore_ptr); |
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/* |
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* 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> |
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/* |
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* 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); |
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static void __init set_preferred_console(void) { |
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if (MACHINE_IS_KVM) |
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add_preferred_console("hvc", 0, NULL); |
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else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) |
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add_preferred_console("ttyS", 0, NULL); |
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else if (CONSOLE_IS_3270) |
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add_preferred_console("tty3270", 0, NULL); } |
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static int __init conmode_setup(char *str) { |
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#if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
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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 |
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set_preferred_console(); |
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return 1; } __setup("conmode=", conmode_setup); static void __init conmode_default(void) { char query_buffer[1024]; char *ptr; if (MACHINE_IS_VM) { |
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cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); |
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console_devno = simple_strtoul(query_buffer + 5, NULL, 16); ptr = strstr(query_buffer, "SUBCHANNEL ="); console_irq = simple_strtoul(ptr + 13, NULL, 16); |
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cpcmd("QUERY TERM", query_buffer, 1024, NULL); |
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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). */ |
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cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
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if (ptr == NULL) { |
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#if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
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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; |
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#elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
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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; |
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#elif defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
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SET_CONSOLE_SCLP; #endif } |
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} else { |
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#if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) |
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SET_CONSOLE_SCLP; #endif } } |
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#ifdef CONFIG_ZFCPDUMP |
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static void __init setup_zfcpdump(unsigned int console_devno) { |
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static char str[41]; |
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if (ipl_info.type != IPL_TYPE_FCP_DUMP) return; |
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if (OLDMEM_BASE) return; |
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if (console_devno != -1) |
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sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x", |
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ipl_info.data.fcp.dev_id.devno, console_devno); else |
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sprintf(str, " cio_ignore=all,!0.0.%04x", |
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ipl_info.data.fcp.dev_id.devno); |
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strcat(boot_command_line, str); |
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console_loglevel = 2; } #else static inline void setup_zfcpdump(unsigned int console_devno) {} #endif /* CONFIG_ZFCPDUMP */ |
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/* * Reboot, halt and power_off stubs. They just call _machine_restart, * _machine_halt or _machine_power_off. */ void machine_restart(char *command) { |
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if ((!in_interrupt() && !in_atomic()) || oops_in_progress) |
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/* * Only unblank the console if we are called in enabled * context or a bust_spinlocks cleared the way for us. */ console_unblank(); |
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_machine_restart(command); } |
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void machine_halt(void) { |
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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(); |
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_machine_halt(); } |
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void machine_power_off(void) { |
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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(); |
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_machine_power_off(); } |
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/* * Dummy power off function. */ void (*pm_power_off)(void) = machine_power_off; |
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static int __init early_parse_mem(char *p) { memory_end = memparse(p, &p); |
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memory_end_set = 1; |
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return 0; } early_param("mem", early_parse_mem); |
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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); |
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unsigned int user_mode = HOME_SPACE_MODE; EXPORT_SYMBOL_GPL(user_mode); |
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|
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static int set_amode_primary(void) |
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{ |
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psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME; psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY; |
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#ifdef CONFIG_COMPAT |
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psw32_user_bits = (psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY; |
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#endif |
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if (MACHINE_HAS_MVCOS) { |
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memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess)); |
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return 1; |
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} else { |
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memcpy(&uaccess, &uaccess_pt, sizeof(uaccess)); |
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return 0; |
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} } /* * Switch kernel/user addressing modes? */ static int __init early_parse_switch_amode(char *p) { |
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user_mode = PRIMARY_SPACE_MODE; |
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return 0; } early_param("switch_amode", early_parse_switch_amode); |
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static int __init early_parse_user_mode(char *p) |
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{ |
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if (p && strcmp(p, "primary") == 0) user_mode = PRIMARY_SPACE_MODE; |
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else if (!p || strcmp(p, "home") == 0) user_mode = HOME_SPACE_MODE; else return 1; |
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return 0; |
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} |
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early_param("user_mode", early_parse_user_mode); |
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|
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static void setup_addressing_mode(void) { |
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if (user_mode == PRIMARY_SPACE_MODE) { |
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if (set_amode_primary()) |
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pr_info("Address spaces switched, " "mvcos available "); else pr_info("Address spaces switched, " "mvcos not available "); |
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} } |
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static void __init setup_lowcore(void) { struct _lowcore *lc; |
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/* * Setup lowcore for boot cpu */ |
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BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096); |
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lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); |
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lc->restart_psw.mask = psw_kernel_bits; |
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lc->restart_psw.addr = |
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PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; |
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lc->external_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_MCHECK; |
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lc->external_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) ext_int_handler; |
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lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK; |
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lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; |
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lc->program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_MCHECK; |
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lc->program_new_psw.addr = |
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PSW_ADDR_AMODE | (unsigned long) pgm_check_handler; lc->mcck_new_psw.mask = psw_kernel_bits; |
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lc->mcck_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; |
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lc->io_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_MCHECK; |
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lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; |
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lc->clock_comparator = -1ULL; |
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lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; lc->async_stack = (unsigned long) __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; |
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lc->panic_stack = (unsigned long) __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; |
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lc->current_task = (unsigned long) init_thread_union.thread_info.task; lc->thread_info = (unsigned long) &init_thread_union; |
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lc->machine_flags = S390_lowcore.machine_flags; |
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lc->stfl_fac_list = S390_lowcore.stfl_fac_list; memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, MAX_FACILITY_BIT/8); |
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#ifndef CONFIG_64BIT |
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if (MACHINE_HAS_IEEE) { lc->extended_save_area_addr = (__u32) |
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__alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0); |
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/* enable extended save area */ |
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__ctl_set_bit(14, 29); |
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} |
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#else lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; |
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#endif |
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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; |
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lc->ftrace_func = S390_lowcore.ftrace_func; |
c9e373535 [PATCH] s390: fix... |
397 |
set_prefix((u32)(unsigned long) lc); |
099b76513 [S390] Automatic ... |
398 |
lowcore_ptr[0] = lc; |
c9e373535 [PATCH] s390: fix... |
399 |
} |
71189284e [S390] setup: sim... |
400 401 402 403 404 405 406 407 408 |
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, }; |
4cc69531f [S390] setup: reg... |
409 410 411 412 |
static struct resource bss_resource = { .name = "Kernel bss", .flags = IORESOURCE_BUSY | IORESOURCE_MEM, }; |
71189284e [S390] setup: sim... |
413 414 415 |
static struct resource __initdata *standard_resources[] = { &code_resource, &data_resource, |
4cc69531f [S390] setup: reg... |
416 |
&bss_resource, |
71189284e [S390] setup: sim... |
417 418 419 |
}; static void __init setup_resources(void) |
c9e373535 [PATCH] s390: fix... |
420 |
{ |
71189284e [S390] setup: sim... |
421 422 |
struct resource *res, *std_res, *sub_res; int i, j; |
c9e373535 [PATCH] s390: fix... |
423 |
|
cc13ad621 [PATCH] s390: set... |
424 425 426 427 |
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; |
4cc69531f [S390] setup: reg... |
428 429 |
bss_resource.start = (unsigned long) &__bss_start; bss_resource.end = (unsigned long) &__bss_stop - 1; |
cc13ad621 [PATCH] s390: set... |
430 |
|
9f4b0ba81 [S390] Get rid of... |
431 432 433 |
for (i = 0; i < MEMORY_CHUNKS; i++) { if (!memory_chunk[i].size) continue; |
60a0c68df [S390] kdump back... |
434 435 436 |
if (memory_chunk[i].type == CHUNK_OLDMEM || memory_chunk[i].type == CHUNK_CRASHK) continue; |
71189284e [S390] setup: sim... |
437 |
res = alloc_bootmem_low(sizeof(*res)); |
c9e373535 [PATCH] s390: fix... |
438 439 440 |
res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; switch (memory_chunk[i].type) { case CHUNK_READ_WRITE: |
dab7a7b15 [S390] Add archit... |
441 |
case CHUNK_CRASHK: |
c9e373535 [PATCH] s390: fix... |
442 443 444 445 446 447 448 449 450 451 |
res->name = "System RAM"; break; case CHUNK_READ_ONLY: res->name = "System ROM"; res->flags |= IORESOURCE_READONLY; break; default: res->name = "reserved"; } res->start = memory_chunk[i].addr; |
71189284e [S390] setup: sim... |
452 |
res->end = res->start + memory_chunk[i].size - 1; |
c9e373535 [PATCH] s390: fix... |
453 |
request_resource(&iomem_resource, res); |
fe355b7f1 [S390] boot from ... |
454 |
|
71189284e [S390] setup: sim... |
455 456 457 458 459 460 461 462 463 464 465 466 467 468 |
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 = alloc_bootmem_low(sizeof(*sub_res)); *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); } |
fe355b7f1 [S390] boot from ... |
469 |
} |
c9e373535 [PATCH] s390: fix... |
470 471 |
} } |
411ed3225 [S390] zfcpdump s... |
472 473 |
unsigned long real_memory_size; EXPORT_SYMBOL_GPL(real_memory_size); |
8b62bc964 [S390] Memory det... |
474 475 |
static void __init setup_memory_end(void) { |
14045ebf1 [S390] add suppor... |
476 |
unsigned long vmax, vmalloc_size, tmp; |
8b62bc964 [S390] Memory det... |
477 |
int i; |
60a0c68df [S390] kdump back... |
478 |
|
59f2e69d0 [S390] zfcpdump: ... |
479 |
#ifdef CONFIG_ZFCPDUMP |
3f25dc4fc [S390] zfcpdump: ... |
480 |
if (ipl_info.type == IPL_TYPE_FCP_DUMP && !OLDMEM_BASE) { |
411ed3225 [S390] zfcpdump s... |
481 |
memory_end = ZFCPDUMP_HSA_SIZE; |
23d75d9ca [S390] fix "mem="... |
482 483 |
memory_end_set = 1; } |
411ed3225 [S390] zfcpdump s... |
484 |
#endif |
14045ebf1 [S390] add suppor... |
485 |
real_memory_size = 0; |
8b62bc964 [S390] Memory det... |
486 |
memory_end &= PAGE_MASK; |
9f4b0ba81 [S390] Get rid of... |
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 |
/* * Make sure all chunks are MAX_ORDER aligned so we don't need the * extra checks that HOLES_IN_ZONE would require. */ for (i = 0; i < MEMORY_CHUNKS; i++) { unsigned long start, end; struct mem_chunk *chunk; unsigned long align; chunk = &memory_chunk[i]; align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); start = (chunk->addr + align - 1) & ~(align - 1); end = (chunk->addr + chunk->size) & ~(align - 1); if (start >= end) memset(chunk, 0, sizeof(*chunk)); else { chunk->addr = start; chunk->size = end - start; } |
14045ebf1 [S390] add suppor... |
506 507 |
real_memory_size = max(real_memory_size, chunk->addr + chunk->size); |
9f4b0ba81 [S390] Get rid of... |
508 |
} |
14045ebf1 [S390] add suppor... |
509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 |
/* Choose kernel address space layout: 2, 3, or 4 levels. */ #ifdef CONFIG_64BIT vmalloc_size = VMALLOC_END ?: 128UL << 30; tmp = (memory_end ?: real_memory_size) / PAGE_SIZE; tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size; if (tmp <= (1UL << 42)) vmax = 1UL << 42; /* 3-level kernel page table */ else vmax = 1UL << 53; /* 4-level kernel page table */ #else vmalloc_size = VMALLOC_END ?: 96UL << 20; vmax = 1UL << 31; /* 2-level kernel page table */ #endif /* vmalloc area is at the end of the kernel address space. */ VMALLOC_END = vmax; VMALLOC_START = vmax - vmalloc_size; /* Split remaining virtual space between 1:1 mapping & vmemmap array */ tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); 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 ?: real_memory_size, tmp); /* Fixup memory chunk array to fit into 0..memory_end */ |
8b62bc964 [S390] Memory det... |
537 538 |
for (i = 0; i < MEMORY_CHUNKS; i++) { struct mem_chunk *chunk = &memory_chunk[i]; |
14045ebf1 [S390] add suppor... |
539 |
if (chunk->addr >= memory_end) { |
8b62bc964 [S390] Memory det... |
540 541 542 |
memset(chunk, 0, sizeof(*chunk)); continue; } |
14045ebf1 [S390] add suppor... |
543 544 |
if (chunk->addr + chunk->size > memory_end) chunk->size = memory_end - chunk->addr; |
8b62bc964 [S390] Memory det... |
545 |
} |
8b62bc964 [S390] Memory det... |
546 |
} |
7dd6b3343 [S390] Add PSW re... |
547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 |
void *restart_stack __attribute__((__section__(".data"))); /* * Setup new PSW and allocate stack for PSW restart interrupt */ static void __init setup_restart_psw(void) { psw_t psw; restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); restart_stack += ASYNC_SIZE; /* * Setup restart PSW for absolute zero lowcore. This is necesary * if PSW restart is done on an offline CPU that has lowcore zero */ |
b50511e41 [S390] cleanup ps... |
563 |
psw.mask = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA | PSW_MASK_BA; |
7dd6b3343 [S390] Add PSW re... |
564 565 566 |
psw.addr = PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw)); } |
d38593f93 [S390] Export vmc... |
567 568 569 570 571 572 573 574 |
static void __init setup_vmcoreinfo(void) { #ifdef CONFIG_KEXEC unsigned long ptr = paddr_vmcoreinfo_note(); copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr)); #endif } |
60a0c68df [S390] kdump back... |
575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 |
#ifdef CONFIG_CRASH_DUMP /* * Find suitable location for crashkernel memory */ static unsigned long __init find_crash_base(unsigned long crash_size, char **msg) { unsigned long crash_base; struct mem_chunk *chunk; int i; if (memory_chunk[0].size < crash_size) { *msg = "first memory chunk must be at least crashkernel size"; return 0; } |
5f894cbb6 [S390] kdump: Rep... |
591 |
if (OLDMEM_BASE && crash_size == OLDMEM_SIZE) |
60a0c68df [S390] kdump back... |
592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 |
return OLDMEM_BASE; for (i = MEMORY_CHUNKS - 1; i >= 0; i--) { chunk = &memory_chunk[i]; if (chunk->size == 0) continue; if (chunk->type != CHUNK_READ_WRITE) continue; if (chunk->size < crash_size) continue; crash_base = (chunk->addr + chunk->size) - crash_size; if (crash_base < crash_size) continue; if (crash_base < ZFCPDUMP_HSA_SIZE_MAX) continue; if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE) continue; return crash_base; } *msg = "no suitable area found"; return 0; } /* * Check if crash_base and crash_size is valid */ static int __init verify_crash_base(unsigned long crash_base, unsigned long crash_size, char **msg) { struct mem_chunk *chunk; int i; /* * Because we do the swap to zero, we must have at least 'crash_size' * bytes free space before crash_base */ if (crash_size > crash_base) { *msg = "crashkernel offset must be greater than size"; return -EINVAL; } /* First memory chunk must be at least crash_size */ if (memory_chunk[0].size < crash_size) { *msg = "first memory chunk must be at least crashkernel size"; return -EINVAL; } /* Check if we fit into the respective memory chunk */ for (i = 0; i < MEMORY_CHUNKS; i++) { chunk = &memory_chunk[i]; if (chunk->size == 0) continue; if (crash_base < chunk->addr) continue; if (crash_base >= chunk->addr + chunk->size) continue; /* we have found the memory chunk */ if (crash_base + crash_size > chunk->addr + chunk->size) { *msg = "selected memory chunk is too small for " "crashkernel memory"; return -EINVAL; } return 0; } *msg = "invalid memory range specified"; return -EINVAL; } /* * Reserve kdump memory by creating a memory hole in the mem_chunk array */ static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size, int type) { |
60a0c68df [S390] kdump back... |
666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 |
create_mem_hole(memory_chunk, addr, size, type); } /* * When kdump is enabled, we have to ensure that no memory from * the area [0 - crashkernel memory size] and * [crashk_res.start - crashk_res.end] is set offline. */ static int kdump_mem_notifier(struct notifier_block *nb, unsigned long action, void *data) { struct memory_notify *arg = data; if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res))) return NOTIFY_BAD; if (arg->start_pfn > PFN_DOWN(crashk_res.end)) return NOTIFY_OK; if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start)) return NOTIFY_OK; return NOTIFY_BAD; } static struct notifier_block kdump_mem_nb = { .notifier_call = kdump_mem_notifier, }; #endif /* * Make sure that oldmem, where the dump is stored, is protected */ static void reserve_oldmem(void) { #ifdef CONFIG_CRASH_DUMP if (!OLDMEM_BASE) return; reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM); reserve_kdump_bootmem(OLDMEM_SIZE, memory_end - OLDMEM_SIZE, CHUNK_OLDMEM); if (OLDMEM_BASE + OLDMEM_SIZE == real_memory_size) saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1; else saved_max_pfn = PFN_DOWN(real_memory_size) - 1; #endif } /* * Reserve memory for kdump kernel to be loaded with kexec */ static void __init reserve_crashkernel(void) { #ifdef CONFIG_CRASH_DUMP unsigned long long crash_base, crash_size; char *msg; int rc; rc = parse_crashkernel(boot_command_line, memory_end, &crash_size, &crash_base); if (rc || crash_size == 0) return; |
dab7a7b15 [S390] Add archit... |
727 728 |
crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); |
60a0c68df [S390] kdump back... |
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 |
if (register_memory_notifier(&kdump_mem_nb)) return; if (!crash_base) crash_base = find_crash_base(crash_size, &msg); if (!crash_base) { pr_info("crashkernel reservation failed: %s ", msg); unregister_memory_notifier(&kdump_mem_nb); return; } if (verify_crash_base(crash_base, crash_size, &msg)) { pr_info("crashkernel reservation failed: %s ", msg); unregister_memory_notifier(&kdump_mem_nb); return; } if (!OLDMEM_BASE && MACHINE_IS_VM) diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; insert_resource(&iomem_resource, &crashk_res); |
dab7a7b15 [S390] Add archit... |
750 |
reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK); |
60a0c68df [S390] kdump back... |
751 752 753 754 755 756 |
pr_info("Reserving %lluMB of memory at %lluMB " "for crashkernel (System RAM: %luMB) ", crash_size >> 20, crash_base >> 20, memory_end >> 20); #endif } |
c9e373535 [PATCH] s390: fix... |
757 758 759 760 |
static void __init setup_memory(void) { unsigned long bootmap_size; |
fe355b7f1 [S390] boot from ... |
761 |
unsigned long start_pfn, end_pfn; |
c9e373535 [PATCH] s390: fix... |
762 |
int i; |
1da177e4c Linux-2.6.12-rc2 |
763 764 765 766 767 |
/* * partially used pages are not usable - thus * we are rounding upwards: */ |
65912a84c [S390] initrd vs.... |
768 769 |
start_pfn = PFN_UP(__pa(&_end)); end_pfn = max_pfn = PFN_DOWN(memory_end); |
1da177e4c Linux-2.6.12-rc2 |
770 |
|
65912a84c [S390] initrd vs.... |
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 |
#ifdef CONFIG_BLK_DEV_INITRD /* * Move the initrd in case the bitmap of the bootmem allocater * would overwrite it. */ if (INITRD_START && INITRD_SIZE) { unsigned long bmap_size; unsigned long start; bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); bmap_size = PFN_PHYS(bmap_size); if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; |
60a0c68df [S390] kdump back... |
786 787 788 789 790 791 792 793 |
#ifdef CONFIG_CRASH_DUMP if (OLDMEM_BASE) { /* Move initrd behind kdump oldmem */ if (start + INITRD_SIZE > OLDMEM_BASE && start < OLDMEM_BASE + OLDMEM_SIZE) start = OLDMEM_BASE + OLDMEM_SIZE; } #endif |
65912a84c [S390] initrd vs.... |
794 |
if (start + INITRD_SIZE > memory_end) { |
3b6ed4ab4 [S390] convert se... |
795 796 |
pr_err("initrd extends beyond end of " "memory (0x%08lx > 0x%08lx) " |
65912a84c [S390] initrd vs.... |
797 798 799 800 801 |
"disabling initrd ", start + INITRD_SIZE, memory_end); INITRD_START = INITRD_SIZE = 0; } else { |
3b6ed4ab4 [S390] convert se... |
802 803 804 805 |
pr_info("Moving initrd (0x%08lx -> " "0x%08lx, size: %ld) ", INITRD_START, start, INITRD_SIZE); |
65912a84c [S390] initrd vs.... |
806 807 808 809 810 811 812 |
memmove((void *) start, (void *) INITRD_START, INITRD_SIZE); INITRD_START = start; } } } #endif |
1da177e4c Linux-2.6.12-rc2 |
813 |
/* |
7676bef9c [S390] Have s390 ... |
814 |
* Initialize the boot-time allocator |
1da177e4c Linux-2.6.12-rc2 |
815 816 817 818 819 820 |
*/ bootmap_size = init_bootmem(start_pfn, end_pfn); /* * Register RAM areas with the bootmem allocator. */ |
c9e373535 [PATCH] s390: fix... |
821 |
|
0b642ede4 [PATCH] s390: def... |
822 |
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { |
39b742f95 [S390] Use add_ac... |
823 |
unsigned long start_chunk, end_chunk, pfn; |
1da177e4c Linux-2.6.12-rc2 |
824 |
|
dab7a7b15 [S390] Add archit... |
825 826 |
if (memory_chunk[i].type != CHUNK_READ_WRITE && memory_chunk[i].type != CHUNK_CRASHK) |
1da177e4c Linux-2.6.12-rc2 |
827 |
continue; |
39b742f95 [S390] Use add_ac... |
828 |
start_chunk = PFN_DOWN(memory_chunk[i].addr); |
fb2e7c5e3 [S390] Fix range ... |
829 |
end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |
39b742f95 [S390] Use add_ac... |
830 831 832 |
end_chunk = min(end_chunk, end_pfn); if (start_chunk >= end_chunk) continue; |
ff38df377 s390: Use HAVE_ME... |
833 834 |
memblock_add_node(PFN_PHYS(start_chunk), PFN_PHYS(end_chunk - start_chunk), 0); |
39b742f95 [S390] Use add_ac... |
835 |
pfn = max(start_chunk, start_pfn); |
fb2e7c5e3 [S390] Fix range ... |
836 |
for (; pfn < end_chunk; pfn++) |
e2b8d7af0 [S390] add suppor... |
837 838 |
page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY, 0); |
1da177e4c Linux-2.6.12-rc2 |
839 |
} |
0b642ede4 [PATCH] s390: def... |
840 |
psw_set_key(PAGE_DEFAULT_KEY); |
39b742f95 [S390] Use add_ac... |
841 |
free_bootmem_with_active_regions(0, max_pfn); |
c9e373535 [PATCH] s390: fix... |
842 843 |
/* |
615b04b30 [S390] nss: Free ... |
844 845 |
* Reserve memory used for lowcore/command line/kernel image. */ |
72a7fe396 Introduce flags f... |
846 |
reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT); |
615b04b30 [S390] nss: Free ... |
847 |
reserve_bootmem((unsigned long)_stext, |
72a7fe396 Introduce flags f... |
848 849 |
PFN_PHYS(start_pfn) - (unsigned long)_stext, BOOTMEM_DEFAULT); |
615b04b30 [S390] nss: Free ... |
850 |
/* |
c9e373535 [PATCH] s390: fix... |
851 852 853 854 855 |
* Reserve the bootmem bitmap itself as well. We do this in two * steps (first step was init_bootmem()) because this catches * the (very unlikely) case of us accidentally initializing the * bootmem allocator with an invalid RAM area. */ |
72a7fe396 Introduce flags f... |
856 857 |
reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size, BOOTMEM_DEFAULT); |
1da177e4c Linux-2.6.12-rc2 |
858 |
|
60a0c68df [S390] kdump back... |
859 860 861 862 863 864 865 866 867 |
#ifdef CONFIG_CRASH_DUMP if (crashk_res.start) reserve_bootmem(crashk_res.start, crashk_res.end - crashk_res.start + 1, BOOTMEM_DEFAULT); if (is_kdump_kernel()) reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE, PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT); #endif |
1da177e4c Linux-2.6.12-rc2 |
868 |
#ifdef CONFIG_BLK_DEV_INITRD |
65912a84c [S390] initrd vs.... |
869 |
if (INITRD_START && INITRD_SIZE) { |
1da177e4c Linux-2.6.12-rc2 |
870 |
if (INITRD_START + INITRD_SIZE <= memory_end) { |
72a7fe396 Introduce flags f... |
871 872 |
reserve_bootmem(INITRD_START, INITRD_SIZE, BOOTMEM_DEFAULT); |
1da177e4c Linux-2.6.12-rc2 |
873 874 875 |
initrd_start = INITRD_START; initrd_end = initrd_start + INITRD_SIZE; } else { |
3b6ed4ab4 [S390] convert se... |
876 877 878 879 |
pr_err("initrd extends beyond end of " "memory (0x%08lx > 0x%08lx) " "disabling initrd ", |
c9e373535 [PATCH] s390: fix... |
880 881 |
initrd_start + INITRD_SIZE, memory_end); initrd_start = initrd_end = 0; |
1da177e4c Linux-2.6.12-rc2 |
882 |
} |
c9e373535 [PATCH] s390: fix... |
883 |
} |
1da177e4c Linux-2.6.12-rc2 |
884 |
#endif |
c9e373535 [PATCH] s390: fix... |
885 |
} |
1da177e4c Linux-2.6.12-rc2 |
886 |
|
cf8ba7a95 [S390] add hardwa... |
887 888 889 890 891 892 |
/* * Setup hardware capabilities. */ static void __init setup_hwcaps(void) { static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; |
94038a991 [S390] More clean... |
893 |
struct cpuid cpu_id; |
cf8ba7a95 [S390] add hardwa... |
894 |
int i; |
cf8ba7a95 [S390] add hardwa... |
895 896 897 898 899 900 901 902 903 904 |
/* * The store facility list bits numbers as found in the principles * of operation are numbered with bit 1UL<<31 as number 0 to * bit 1UL<<0 as number 31. * Bit 0: instructions named N3, "backported" to esa-mode * Bit 2: z/Architecture mode is active * Bit 7: the store-facility-list-extended facility is installed * Bit 17: the message-security assist is installed * Bit 19: the long-displacement facility is installed * Bit 21: the extended-immediate facility is installed |
488253ce4 [S390] Add hwcap ... |
905 906 |
* Bit 22: extended-translation facility 3 is installed * Bit 30: extended-translation facility 3 enhancement facility |
cf8ba7a95 [S390] add hardwa... |
907 908 909 |
* These get translated to: * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, |
488253ce4 [S390] Add hwcap ... |
910 911 |
* HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and * HWCAP_S390_ETF3EH bit 8 (22 && 30). |
cf8ba7a95 [S390] add hardwa... |
912 913 |
*/ for (i = 0; i < 6; i++) |
14375bc4e [S390] cleanup fa... |
914 |
if (test_facility(stfl_bits[i])) |
cf8ba7a95 [S390] add hardwa... |
915 |
elf_hwcap |= 1UL << i; |
14375bc4e [S390] cleanup fa... |
916 |
if (test_facility(22) && test_facility(30)) |
ea2a4d3a3 [S390] 64-bit reg... |
917 |
elf_hwcap |= HWCAP_S390_ETF3EH; |
488253ce4 [S390] Add hwcap ... |
918 |
|
cf8ba7a95 [S390] add hardwa... |
919 920 921 922 923 924 |
/* * Check for additional facilities with store-facility-list-extended. * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information * as stored by stfl, bits 32-xxx contain additional facilities. * How many facility words are stored depends on the number of |
25985edce Fix common misspe... |
925 |
* doublewords passed to the instruction. The additional facilities |
cf8ba7a95 [S390] add hardwa... |
926 |
* are: |
2ac3307f2 [S390] fix dfp el... |
927 928 |
* Bit 42: decimal floating point facility is installed * Bit 44: perform floating point operation facility is installed |
cf8ba7a95 [S390] add hardwa... |
929 |
* translated to: |
488253ce4 [S390] Add hwcap ... |
930 |
* HWCAP_S390_DFP bit 6 (42 && 44). |
cf8ba7a95 [S390] add hardwa... |
931 |
*/ |
14375bc4e [S390] cleanup fa... |
932 933 |
if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) elf_hwcap |= HWCAP_S390_DFP; |
cf8ba7a95 [S390] add hardwa... |
934 |
|
ea2a4d3a3 [S390] 64-bit reg... |
935 936 937 |
/* * Huge page support HWCAP_S390_HPAGE is bit 7. */ |
53492b1de [S390] System z l... |
938 |
if (MACHINE_HAS_HPAGE) |
ea2a4d3a3 [S390] 64-bit reg... |
939 940 941 942 943 944 945 |
elf_hwcap |= HWCAP_S390_HPAGE; /* * 64-bit register support for 31-bit processes * HWCAP_S390_HIGH_GPRS is bit 9. */ elf_hwcap |= HWCAP_S390_HIGH_GPRS; |
53492b1de [S390] System z l... |
946 |
|
94038a991 [S390] More clean... |
947 948 |
get_cpu_id(&cpu_id); switch (cpu_id.machine) { |
cf8ba7a95 [S390] add hardwa... |
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 |
case 0x9672: #if !defined(CONFIG_64BIT) default: /* Use "g5" as default for 31 bit kernels. */ #endif strcpy(elf_platform, "g5"); break; case 0x2064: case 0x2066: #if defined(CONFIG_64BIT) default: /* Use "z900" as default for 64 bit kernels. */ #endif strcpy(elf_platform, "z900"); break; case 0x2084: case 0x2086: strcpy(elf_platform, "z990"); break; case 0x2094: |
9fee8db22 [S390] add new ma... |
967 |
case 0x2096: |
cf8ba7a95 [S390] add hardwa... |
968 969 |
strcpy(elf_platform, "z9-109"); break; |
9fee8db22 [S390] add new ma... |
970 971 972 973 |
case 0x2097: case 0x2098: strcpy(elf_platform, "z10"); break; |
c84b9051d [S390] Add z196 m... |
974 |
case 0x2817: |
3a81b1714 [S390] Add suppor... |
975 |
case 0x2818: |
c84b9051d [S390] Add z196 m... |
976 977 |
strcpy(elf_platform, "z196"); break; |
cf8ba7a95 [S390] add hardwa... |
978 979 |
} } |
c9e373535 [PATCH] s390: fix... |
980 981 982 983 |
/* * Setup function called from init/main.c just after the banner * was printed. */ |
1da177e4c Linux-2.6.12-rc2 |
984 |
|
c9e373535 [PATCH] s390: fix... |
985 986 987 |
void __init setup_arch(char **cmdline_p) { |
1da177e4c Linux-2.6.12-rc2 |
988 |
/* |
c9e373535 [PATCH] s390: fix... |
989 |
* print what head.S has found out about the machine |
1da177e4c Linux-2.6.12-rc2 |
990 |
*/ |
347a8dc3b [PATCH] s390: cle... |
991 |
#ifndef CONFIG_64BIT |
3b6ed4ab4 [S390] convert se... |
992 993 994 995 |
if (MACHINE_IS_VM) pr_info("Linux is running as a z/VM " "guest operating system in 31-bit mode "); |
27d71602b [S390] add MACHIN... |
996 |
else if (MACHINE_IS_LPAR) |
3b6ed4ab4 [S390] convert se... |
997 998 999 1000 1001 1002 1003 1004 1005 1006 |
pr_info("Linux is running natively in 31-bit mode "); if (MACHINE_HAS_IEEE) pr_info("The hardware system has IEEE compatible " "floating point units "); else pr_info("The hardware system has no IEEE compatible " "floating point units "); |
347a8dc3b [PATCH] s390: cle... |
1007 |
#else /* CONFIG_64BIT */ |
fa5877439 s390: KVM guest: ... |
1008 |
if (MACHINE_IS_VM) |
3b6ed4ab4 [S390] convert se... |
1009 1010 1011 |
pr_info("Linux is running as a z/VM " "guest operating system in 64-bit mode "); |
637952ca6 [S390] set prefer... |
1012 |
else if (MACHINE_IS_KVM) |
3b6ed4ab4 [S390] convert se... |
1013 1014 |
pr_info("Linux is running under KVM in 64-bit mode "); |
27d71602b [S390] add MACHIN... |
1015 |
else if (MACHINE_IS_LPAR) |
3b6ed4ab4 [S390] convert se... |
1016 1017 |
pr_info("Linux is running natively in 64-bit mode "); |
347a8dc3b [PATCH] s390: cle... |
1018 |
#endif /* CONFIG_64BIT */ |
c9e373535 [PATCH] s390: fix... |
1019 |
|
a0443fbb4 [S390] Extra Kern... |
1020 1021 1022 |
/* Have one command line that is parsed and saved in /proc/cmdline */ /* boot_command_line has been already set up in early.c */ *cmdline_p = boot_command_line; |
596852967 [PATCH] s390: ear... |
1023 |
|
c9e373535 [PATCH] s390: fix... |
1024 |
ROOT_DEV = Root_RAM0; |
596852967 [PATCH] s390: ear... |
1025 1026 1027 1028 1029 |
init_mm.start_code = PAGE_OFFSET; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) &_end; |
6c2a9e6df [S390] Use altern... |
1030 1031 1032 1033 |
if (MACHINE_HAS_MVCOS) memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); else memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); |
596852967 [PATCH] s390: ear... |
1034 |
parse_early_param(); |
99ca4e582 [S390] kernel: Sh... |
1035 |
setup_ipl(); |
8b62bc964 [S390] Memory det... |
1036 |
setup_memory_end(); |
c1821c2e9 [S390] noexec pro... |
1037 |
setup_addressing_mode(); |
60a0c68df [S390] kdump back... |
1038 1039 |
reserve_oldmem(); reserve_crashkernel(); |
c9e373535 [PATCH] s390: fix... |
1040 1041 |
setup_memory(); setup_resources(); |
d38593f93 [S390] Export vmc... |
1042 |
setup_vmcoreinfo(); |
7dd6b3343 [S390] Add PSW re... |
1043 |
setup_restart_psw(); |
c9e373535 [PATCH] s390: fix... |
1044 |
setup_lowcore(); |
1da177e4c Linux-2.6.12-rc2 |
1045 |
cpu_init(); |
dbd70fb49 [S390] cpu topolo... |
1046 |
s390_init_cpu_topology(); |
1da177e4c Linux-2.6.12-rc2 |
1047 1048 |
/* |
cf8ba7a95 [S390] add hardwa... |
1049 1050 1051 1052 1053 |
* Setup capabilities (ELF_HWCAP & ELF_PLATFORM). */ setup_hwcaps(); /* |
1da177e4c Linux-2.6.12-rc2 |
1054 1055 1056 1057 1058 1059 |
* Create kernel page tables and switch to virtual addressing. */ paging_init(); /* Setup default console */ conmode_default(); |
637952ca6 [S390] set prefer... |
1060 |
set_preferred_console(); |
411ed3225 [S390] zfcpdump s... |
1061 1062 1063 |
/* Setup zfcpdump support */ setup_zfcpdump(console_devno); |
1da177e4c Linux-2.6.12-rc2 |
1064 |
} |