c4972f3316
setup_lowcore() calls ctl_set_bit() which returns withs interrupts enabled. The setup arch code is not supposed to enable interrupts that early. Therefore use the __ctl_set_bit() variant. This fixes the not working lock dependency validator on non 64 bit systems. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
762 lines
19 KiB
C
762 lines
19 KiB
C
/*
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* arch/s390/kernel/setup.c
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*
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* S390 version
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* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Hartmut Penner (hp@de.ibm.com),
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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*
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* Derived from "arch/i386/kernel/setup.c"
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* Copyright (C) 1995, Linus Torvalds
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*/
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/*
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* This file handles the architecture-dependent parts of initialization
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#include <linux/a.out.h>
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#include <linux/tty.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/initrd.h>
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#include <linux/bootmem.h>
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#include <linux/root_dev.h>
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#include <linux/console.h>
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#include <linux/seq_file.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 <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/smp.h>
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#include <asm/mmu_context.h>
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#include <asm/cpcmd.h>
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#include <asm/lowcore.h>
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#include <asm/irq.h>
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#include <asm/page.h>
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#include <asm/ptrace.h>
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#include <asm/sections.h>
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/*
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* User copy operations.
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*/
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struct uaccess_ops uaccess;
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EXPORT_SYMBOL_GPL(uaccess);
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/*
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* Machine setup..
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*/
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unsigned int console_mode = 0;
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unsigned int console_devno = -1;
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unsigned int console_irq = -1;
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unsigned long memory_size = 0;
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unsigned long machine_flags = 0;
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struct {
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unsigned long addr, size, type;
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} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
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#define CHUNK_READ_WRITE 0
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#define CHUNK_READ_ONLY 1
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volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
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unsigned long __initdata zholes_size[MAX_NR_ZONES];
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static unsigned long __initdata memory_end;
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/*
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* This is set up by the setup-routine at boot-time
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* for S390 need to find out, what we have to setup
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* using address 0x10400 ...
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*/
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#include <asm/setup.h>
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static struct resource code_resource = {
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.name = "Kernel code",
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
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};
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static struct resource data_resource = {
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.name = "Kernel data",
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
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};
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/*
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* cpu_init() initializes state that is per-CPU.
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*/
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void __devinit cpu_init (void)
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{
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int addr = hard_smp_processor_id();
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/*
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* Store processor id in lowcore (used e.g. in timer_interrupt)
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*/
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asm volatile("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
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S390_lowcore.cpu_data.cpu_addr = addr;
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/*
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* Force FPU initialization:
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*/
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clear_thread_flag(TIF_USEDFPU);
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clear_used_math();
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atomic_inc(&init_mm.mm_count);
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current->active_mm = &init_mm;
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if (current->mm)
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BUG();
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enter_lazy_tlb(&init_mm, current);
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}
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/*
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* VM halt and poweroff setup routines
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*/
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char vmhalt_cmd[128] = "";
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char vmpoff_cmd[128] = "";
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char vmpanic_cmd[128] = "";
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static inline void strncpy_skip_quote(char *dst, char *src, int n)
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{
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int sx, dx;
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dx = 0;
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for (sx = 0; src[sx] != 0; sx++) {
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if (src[sx] == '"') continue;
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dst[dx++] = src[sx];
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if (dx >= n) break;
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}
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}
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static int __init vmhalt_setup(char *str)
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{
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strncpy_skip_quote(vmhalt_cmd, str, 127);
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vmhalt_cmd[127] = 0;
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return 1;
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}
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__setup("vmhalt=", vmhalt_setup);
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static int __init vmpoff_setup(char *str)
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{
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strncpy_skip_quote(vmpoff_cmd, str, 127);
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vmpoff_cmd[127] = 0;
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return 1;
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}
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__setup("vmpoff=", vmpoff_setup);
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static int vmpanic_notify(struct notifier_block *self, unsigned long event,
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void *data)
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{
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if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0)
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cpcmd(vmpanic_cmd, NULL, 0, NULL);
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return NOTIFY_OK;
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}
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#define PANIC_PRI_VMPANIC 0
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static struct notifier_block vmpanic_nb = {
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.notifier_call = vmpanic_notify,
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.priority = PANIC_PRI_VMPANIC
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};
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static int __init vmpanic_setup(char *str)
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{
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static int register_done __initdata = 0;
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strncpy_skip_quote(vmpanic_cmd, str, 127);
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vmpanic_cmd[127] = 0;
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if (!register_done) {
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register_done = 1;
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atomic_notifier_chain_register(&panic_notifier_list,
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&vmpanic_nb);
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}
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return 1;
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}
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__setup("vmpanic=", vmpanic_setup);
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/*
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* condev= and conmode= setup parameter.
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*/
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static int __init condev_setup(char *str)
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{
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int vdev;
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vdev = simple_strtoul(str, &str, 0);
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if (vdev >= 0 && vdev < 65536) {
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console_devno = vdev;
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console_irq = -1;
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}
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return 1;
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}
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__setup("condev=", condev_setup);
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static int __init conmode_setup(char *str)
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{
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#if defined(CONFIG_SCLP_CONSOLE)
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if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
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SET_CONSOLE_SCLP;
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#endif
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#if defined(CONFIG_TN3215_CONSOLE)
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if (strncmp(str, "3215", 5) == 0)
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SET_CONSOLE_3215;
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#endif
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#if defined(CONFIG_TN3270_CONSOLE)
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if (strncmp(str, "3270", 5) == 0)
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SET_CONSOLE_3270;
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#endif
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return 1;
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}
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__setup("conmode=", conmode_setup);
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static void __init conmode_default(void)
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{
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char query_buffer[1024];
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char *ptr;
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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);
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ptr = strstr(query_buffer, "SUBCHANNEL =");
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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");
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/*
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* Set the conmode to 3215 so that the device recognition
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* will set the cu_type of the console to 3215. If the
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* conmode is 3270 and we don't set it back then both
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* 3215 and the 3270 driver will try to access the console
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* device (3215 as console and 3270 as normal tty).
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*/
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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)
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SET_CONSOLE_SCLP;
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#endif
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return;
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}
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if (strncmp(ptr + 8, "3270", 4) == 0) {
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#if defined(CONFIG_TN3270_CONSOLE)
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SET_CONSOLE_3270;
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#elif defined(CONFIG_TN3215_CONSOLE)
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SET_CONSOLE_3215;
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#elif defined(CONFIG_SCLP_CONSOLE)
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SET_CONSOLE_SCLP;
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#endif
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} else if (strncmp(ptr + 8, "3215", 4) == 0) {
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#if defined(CONFIG_TN3215_CONSOLE)
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SET_CONSOLE_3215;
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#elif defined(CONFIG_TN3270_CONSOLE)
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SET_CONSOLE_3270;
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#elif defined(CONFIG_SCLP_CONSOLE)
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SET_CONSOLE_SCLP;
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#endif
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}
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} else if (MACHINE_IS_P390) {
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#if defined(CONFIG_TN3215_CONSOLE)
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SET_CONSOLE_3215;
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#elif defined(CONFIG_TN3270_CONSOLE)
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SET_CONSOLE_3270;
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#endif
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} else {
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#if defined(CONFIG_SCLP_CONSOLE)
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SET_CONSOLE_SCLP;
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#endif
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}
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}
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#ifdef CONFIG_SMP
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extern void machine_restart_smp(char *);
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extern void machine_halt_smp(void);
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extern void machine_power_off_smp(void);
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void (*_machine_restart)(char *command) = machine_restart_smp;
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void (*_machine_halt)(void) = machine_halt_smp;
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void (*_machine_power_off)(void) = machine_power_off_smp;
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#else
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/*
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* Reboot, halt and power_off routines for non SMP.
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*/
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static void do_machine_restart_nonsmp(char * __unused)
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{
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do_reipl();
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}
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static void do_machine_halt_nonsmp(void)
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{
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if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
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cpcmd(vmhalt_cmd, NULL, 0, NULL);
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signal_processor(smp_processor_id(), sigp_stop_and_store_status);
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}
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static void do_machine_power_off_nonsmp(void)
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{
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if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
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cpcmd(vmpoff_cmd, NULL, 0, NULL);
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signal_processor(smp_processor_id(), sigp_stop_and_store_status);
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}
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void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
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void (*_machine_halt)(void) = do_machine_halt_nonsmp;
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void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
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#endif
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/*
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* Reboot, halt and power_off stubs. They just call _machine_restart,
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* _machine_halt or _machine_power_off.
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*/
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void machine_restart(char *command)
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{
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if (!in_interrupt() || oops_in_progress)
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/*
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* Only unblank the console if we are called in enabled
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* context or a bust_spinlocks cleared the way for us.
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*/
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console_unblank();
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_machine_restart(command);
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}
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void machine_halt(void)
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{
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if (!in_interrupt() || oops_in_progress)
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/*
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* Only unblank the console if we are called in enabled
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* context or a bust_spinlocks cleared the way for us.
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*/
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console_unblank();
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_machine_halt();
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}
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void machine_power_off(void)
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{
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if (!in_interrupt() || oops_in_progress)
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/*
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* Only unblank the console if we are called in enabled
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* context or a bust_spinlocks cleared the way for us.
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*/
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console_unblank();
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_machine_power_off();
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}
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/*
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* Dummy power off function.
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*/
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void (*pm_power_off)(void) = machine_power_off;
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static void __init
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add_memory_hole(unsigned long start, unsigned long end)
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{
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unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
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if (end <= dma_pfn)
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zholes_size[ZONE_DMA] += end - start + 1;
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else if (start > dma_pfn)
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zholes_size[ZONE_NORMAL] += end - start + 1;
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else {
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zholes_size[ZONE_DMA] += dma_pfn - start + 1;
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zholes_size[ZONE_NORMAL] += end - dma_pfn;
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}
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}
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static int __init early_parse_mem(char *p)
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{
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memory_end = memparse(p, &p);
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return 0;
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}
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early_param("mem", early_parse_mem);
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/*
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* "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
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*/
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static int __init early_parse_ipldelay(char *p)
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{
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unsigned long delay = 0;
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delay = simple_strtoul(p, &p, 0);
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switch (*p) {
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case 's':
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case 'S':
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delay *= 1000000;
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break;
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case 'm':
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case 'M':
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delay *= 60 * 1000000;
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}
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/* now wait for the requested amount of time */
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udelay(delay);
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return 0;
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}
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early_param("ipldelay", early_parse_ipldelay);
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static void __init
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setup_lowcore(void)
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{
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struct _lowcore *lc;
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int lc_pages;
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/*
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* Setup lowcore for boot cpu
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*/
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lc_pages = sizeof(void *) == 8 ? 2 : 1;
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lc = (struct _lowcore *)
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__alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
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memset(lc, 0, lc_pages * PAGE_SIZE);
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lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
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lc->restart_psw.addr =
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PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
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lc->external_new_psw.mask = PSW_KERNEL_BITS;
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lc->external_new_psw.addr =
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PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
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lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
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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;
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lc->program_new_psw.addr =
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PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
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lc->mcck_new_psw.mask =
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PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
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lc->mcck_new_psw.addr =
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PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
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lc->io_new_psw.mask = PSW_KERNEL_BITS;
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lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
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lc->ipl_device = S390_lowcore.ipl_device;
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lc->jiffy_timer = -1LL;
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lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
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lc->async_stack = (unsigned long)
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__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
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lc->panic_stack = (unsigned long)
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__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
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lc->current_task = (unsigned long) init_thread_union.thread_info.task;
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lc->thread_info = (unsigned long) &init_thread_union;
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#ifndef CONFIG_64BIT
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if (MACHINE_HAS_IEEE) {
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lc->extended_save_area_addr = (__u32)
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__alloc_bootmem(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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#endif
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set_prefix((u32)(unsigned long) lc);
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}
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static void __init
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setup_resources(void)
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{
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struct resource *res;
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int i;
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code_resource.start = (unsigned long) &_text;
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code_resource.end = (unsigned long) &_etext - 1;
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data_resource.start = (unsigned long) &_etext;
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data_resource.end = (unsigned long) &_edata - 1;
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for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
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res = alloc_bootmem_low(sizeof(struct resource));
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res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
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switch (memory_chunk[i].type) {
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case CHUNK_READ_WRITE:
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res->name = "System RAM";
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break;
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case CHUNK_READ_ONLY:
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res->name = "System ROM";
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res->flags |= IORESOURCE_READONLY;
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break;
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default:
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res->name = "reserved";
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}
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res->start = memory_chunk[i].addr;
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res->end = memory_chunk[i].addr + memory_chunk[i].size - 1;
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request_resource(&iomem_resource, res);
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request_resource(res, &code_resource);
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request_resource(res, &data_resource);
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}
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}
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static void __init
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setup_memory(void)
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{
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unsigned long bootmap_size;
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unsigned long start_pfn, end_pfn, init_pfn;
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unsigned long last_rw_end;
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int i;
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/*
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* partially used pages are not usable - thus
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* we are rounding upwards:
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*/
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start_pfn = PFN_UP(__pa(&_end));
|
|
end_pfn = max_pfn = PFN_DOWN(memory_end);
|
|
|
|
/* Initialize storage key for kernel pages */
|
|
for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
|
|
page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
|
|
|
|
#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;
|
|
|
|
if (start + INITRD_SIZE > memory_end) {
|
|
printk("initrd extends beyond end of memory "
|
|
"(0x%08lx > 0x%08lx)\n"
|
|
"disabling initrd\n",
|
|
start + INITRD_SIZE, memory_end);
|
|
INITRD_START = INITRD_SIZE = 0;
|
|
} else {
|
|
printk("Moving initrd (0x%08lx -> 0x%08lx, "
|
|
"size: %ld)\n",
|
|
INITRD_START, start, INITRD_SIZE);
|
|
memmove((void *) start, (void *) INITRD_START,
|
|
INITRD_SIZE);
|
|
INITRD_START = start;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialize the boot-time allocator
|
|
*/
|
|
bootmap_size = init_bootmem(start_pfn, end_pfn);
|
|
|
|
/*
|
|
* Register RAM areas with the bootmem allocator.
|
|
*/
|
|
last_rw_end = start_pfn;
|
|
|
|
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
|
|
unsigned long start_chunk, end_chunk;
|
|
|
|
if (memory_chunk[i].type != CHUNK_READ_WRITE)
|
|
continue;
|
|
start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
|
|
start_chunk >>= PAGE_SHIFT;
|
|
end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
|
|
end_chunk >>= PAGE_SHIFT;
|
|
if (start_chunk < start_pfn)
|
|
start_chunk = start_pfn;
|
|
if (end_chunk > end_pfn)
|
|
end_chunk = end_pfn;
|
|
if (start_chunk < end_chunk) {
|
|
/* Initialize storage key for RAM pages */
|
|
for (init_pfn = start_chunk ; init_pfn < end_chunk;
|
|
init_pfn++)
|
|
page_set_storage_key(init_pfn << PAGE_SHIFT,
|
|
PAGE_DEFAULT_KEY);
|
|
free_bootmem(start_chunk << PAGE_SHIFT,
|
|
(end_chunk - start_chunk) << PAGE_SHIFT);
|
|
if (last_rw_end < start_chunk)
|
|
add_memory_hole(last_rw_end, start_chunk - 1);
|
|
last_rw_end = end_chunk;
|
|
}
|
|
}
|
|
|
|
psw_set_key(PAGE_DEFAULT_KEY);
|
|
|
|
if (last_rw_end < end_pfn - 1)
|
|
add_memory_hole(last_rw_end, end_pfn - 1);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (INITRD_START && INITRD_SIZE) {
|
|
if (INITRD_START + INITRD_SIZE <= memory_end) {
|
|
reserve_bootmem(INITRD_START, INITRD_SIZE);
|
|
initrd_start = INITRD_START;
|
|
initrd_end = initrd_start + INITRD_SIZE;
|
|
} else {
|
|
printk("initrd extends beyond end of memory "
|
|
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
|
|
initrd_start + INITRD_SIZE, memory_end);
|
|
initrd_start = initrd_end = 0;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Setup function called from init/main.c just after the banner
|
|
* was printed.
|
|
*/
|
|
|
|
void __init
|
|
setup_arch(char **cmdline_p)
|
|
{
|
|
/*
|
|
* print what head.S has found out about the machine
|
|
*/
|
|
#ifndef CONFIG_64BIT
|
|
printk((MACHINE_IS_VM) ?
|
|
"We are running under VM (31 bit mode)\n" :
|
|
"We are running native (31 bit mode)\n");
|
|
printk((MACHINE_HAS_IEEE) ?
|
|
"This machine has an IEEE fpu\n" :
|
|
"This machine has no IEEE fpu\n");
|
|
#else /* CONFIG_64BIT */
|
|
printk((MACHINE_IS_VM) ?
|
|
"We are running under VM (64 bit mode)\n" :
|
|
"We are running native (64 bit mode)\n");
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
/* Save unparsed command line copy for /proc/cmdline */
|
|
strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
|
|
|
|
*cmdline_p = COMMAND_LINE;
|
|
*(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
|
|
|
|
ROOT_DEV = Root_RAM0;
|
|
|
|
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;
|
|
|
|
memory_end = memory_size;
|
|
|
|
if (MACHINE_HAS_MVCOS)
|
|
memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess));
|
|
else
|
|
memcpy(&uaccess, &uaccess_std, sizeof(uaccess));
|
|
|
|
parse_early_param();
|
|
|
|
#ifndef CONFIG_64BIT
|
|
memory_end &= ~0x400000UL;
|
|
|
|
/*
|
|
* We need some free virtual space to be able to do vmalloc.
|
|
* On a machine with 2GB memory we make sure that we have at
|
|
* least 128 MB free space for vmalloc.
|
|
*/
|
|
if (memory_end > 1920*1024*1024)
|
|
memory_end = 1920*1024*1024;
|
|
#else /* CONFIG_64BIT */
|
|
memory_end &= ~0x200000UL;
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
setup_memory();
|
|
setup_resources();
|
|
setup_lowcore();
|
|
|
|
cpu_init();
|
|
__cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
|
|
smp_setup_cpu_possible_map();
|
|
|
|
/*
|
|
* Create kernel page tables and switch to virtual addressing.
|
|
*/
|
|
paging_init();
|
|
|
|
/* Setup default console */
|
|
conmode_default();
|
|
}
|
|
|
|
void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
|
|
{
|
|
printk("cpu %d "
|
|
#ifdef CONFIG_SMP
|
|
"phys_idx=%d "
|
|
#endif
|
|
"vers=%02X ident=%06X machine=%04X unused=%04X\n",
|
|
cpuinfo->cpu_nr,
|
|
#ifdef CONFIG_SMP
|
|
cpuinfo->cpu_addr,
|
|
#endif
|
|
cpuinfo->cpu_id.version,
|
|
cpuinfo->cpu_id.ident,
|
|
cpuinfo->cpu_id.machine,
|
|
cpuinfo->cpu_id.unused);
|
|
}
|
|
|
|
/*
|
|
* show_cpuinfo - Get information on one CPU for use by procfs.
|
|
*/
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
struct cpuinfo_S390 *cpuinfo;
|
|
unsigned long n = (unsigned long) v - 1;
|
|
|
|
preempt_disable();
|
|
if (!n) {
|
|
seq_printf(m, "vendor_id : IBM/S390\n"
|
|
"# processors : %i\n"
|
|
"bogomips per cpu: %lu.%02lu\n",
|
|
num_online_cpus(), loops_per_jiffy/(500000/HZ),
|
|
(loops_per_jiffy/(5000/HZ))%100);
|
|
}
|
|
if (cpu_online(n)) {
|
|
#ifdef CONFIG_SMP
|
|
if (smp_processor_id() == n)
|
|
cpuinfo = &S390_lowcore.cpu_data;
|
|
else
|
|
cpuinfo = &lowcore_ptr[n]->cpu_data;
|
|
#else
|
|
cpuinfo = &S390_lowcore.cpu_data;
|
|
#endif
|
|
seq_printf(m, "processor %li: "
|
|
"version = %02X, "
|
|
"identification = %06X, "
|
|
"machine = %04X\n",
|
|
n, cpuinfo->cpu_id.version,
|
|
cpuinfo->cpu_id.ident,
|
|
cpuinfo->cpu_id.machine);
|
|
}
|
|
preempt_enable();
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
|
|
}
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_start(m, pos);
|
|
}
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|