| /* |
| * arch/s390/kernel/setup.c |
| * |
| * S390 version |
| * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Author(s): Hartmut Penner (hp@de.ibm.com), |
| * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| * |
| * Derived from "arch/i386/kernel/setup.c" |
| * Copyright (C) 1995, Linus Torvalds |
| */ |
| |
| /* |
| * This file handles the architecture-dependent parts of initialization |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/stddef.h> |
| #include <linux/unistd.h> |
| #include <linux/ptrace.h> |
| #include <linux/slab.h> |
| #include <linux/user.h> |
| #include <linux/a.out.h> |
| #include <linux/tty.h> |
| #include <linux/ioport.h> |
| #include <linux/delay.h> |
| #include <linux/config.h> |
| #include <linux/init.h> |
| #ifdef CONFIG_BLK_DEV_RAM |
| #include <linux/blk.h> |
| #endif |
| #include <linux/bootmem.h> |
| #include <linux/console.h> |
| #include <linux/seq_file.h> |
| #include <asm/uaccess.h> |
| #include <asm/system.h> |
| #include <asm/smp.h> |
| #include <asm/mmu_context.h> |
| #include <asm/cpcmd.h> |
| |
| /* |
| * Machine setup.. |
| */ |
| unsigned int console_mode = 0; |
| unsigned int console_device = -1; |
| unsigned long memory_size = 0; |
| unsigned long machine_flags = 0; |
| struct { unsigned long addr, size, type; } memory_chunk[16] = { { 0 } }; |
| #define CHUNK_READ_WRITE 0 |
| #define CHUNK_READ_ONLY 1 |
| __u16 boot_cpu_addr; |
| int cpus_initialized = 0; |
| unsigned long cpu_initialized = 0; |
| volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ |
| |
| unsigned long *pfix_table; |
| unsigned int __global_storage_key; |
| |
| unsigned int get_storage_key(void) { return __global_storage_key; } |
| |
| unsigned long pfix_get_page_addr(void *addr) |
| { |
| if (!MACHINE_HAS_PFIX) |
| return (unsigned long) addr; |
| |
| return pfix_table[(unsigned long)virt_to_phys(addr)>>PAGE_SHIFT]; |
| } |
| |
| unsigned long pfix_get_addr(void *addr) |
| { |
| if (!MACHINE_HAS_PFIX) |
| return (unsigned long) addr; |
| |
| return pfix_get_page_addr(addr) + ((unsigned long)addr&(PAGE_SIZE-1)); |
| } |
| |
| /* |
| * These functions allow to lock and unlock pages in VM. They need |
| * the absolute address of the page to be locked or unlocked. This will |
| * only work if the diag98 option in the user directory is enabled for |
| * the guest. |
| */ |
| |
| /* if result is 0, addr will become the host absolute address */ |
| static inline int pfix_lock_page(void *addr) |
| { |
| int ret; |
| |
| __asm__ __volatile__( |
| " sske %1,%2\n" /* set storage key */ |
| " l 0,0(%1)\n" /* addr into gpr 0 */ |
| " lhi 2,0\n" /* function code is 0 */ |
| " diag 2,0,0x98\n" /* result in gpr 1 */ |
| " jnz 0f\n" |
| " lhi %0,0\n" /* if cc=0: return 0 */ |
| " st 1,0(%1)\n" /* gpr1 contains host absol. addr */ |
| " j 1f\n" |
| "0: lr %0,1\n" /* gpr1 contains error code */ |
| " sske %1,2\n" /* reset storage key */ |
| "1:\n" |
| : "=d" (ret), "+d" ((unsigned long)addr) : "d" (__global_storage_key) |
| : "0", "1", "2", "cc" ); |
| return ret; |
| } |
| |
| static inline void pfix_unlock_page(unsigned long addr) |
| { |
| __asm__ __volatile__( |
| " lr 0,%0\n" /* parameter in gpr 0 */ |
| " lhi 2,4\n" /* function code is 4 */ |
| " diag 2,0,0x98\n" /* result in gpr 1 */ |
| " sske %0,%1\n" |
| : : "a" (addr), "d" (0) |
| : "0", "1", "2", "cc" ); |
| } |
| |
| static void unpfix_all_pages(void) |
| { |
| unsigned long i; |
| |
| if (!pfix_table) |
| return; |
| |
| for (i=0; i<sizeof(pfix_table); i++) { |
| if (pfix_table[i]) { |
| pfix_unlock_page(i << PAGE_SHIFT); |
| } |
| } |
| } |
| |
| static void pfix_all_pages(unsigned long start_pfn, unsigned long max_pfn) |
| { |
| unsigned long i,r; |
| unsigned long size; |
| |
| size = ((max_pfn - start_pfn) >> PAGE_SHIFT) * sizeof(long); |
| pfix_table = alloc_bootmem(size); |
| if (!pfix_table) |
| return; |
| |
| __global_storage_key = 6 << 4; |
| for (i = 0; i < 16 && memory_chunk[i].size > 0; i++) { |
| unsigned long start; |
| |
| for(start = memory_chunk[i].addr; |
| (start < memory_chunk[i].addr + memory_chunk[i].size && |
| start < max_pfn); start += PAGE_SIZE) { |
| unsigned long index; |
| |
| index = start >> PAGE_SHIFT; |
| pfix_table[index] = start; |
| r = pfix_lock_page(&pfix_table[index]); |
| if (r) { |
| pfix_table[index] = 0; |
| unpfix_all_pages(); |
| free_bootmem((unsigned long)pfix_table, size); |
| machine_flags &= ~128; /* MACHINE_HAS_PFIX=0 */ |
| __global_storage_key = 0; |
| printk(KERN_WARNING "Error enabling PFIX at " |
| "address 0x%08lx.\n", start); |
| return; |
| } |
| } |
| } |
| printk (KERN_INFO "PFIX enabled.\n"); |
| } |
| |
| /* |
| * Setup options |
| */ |
| extern int _text,_etext, _edata, _end; |
| |
| /* |
| * This is set up by the setup-routine at boot-time |
| * for S390 need to find out, what we have to setup |
| * using address 0x10400 ... |
| */ |
| |
| #include <asm/setup.h> |
| |
| static char command_line[COMMAND_LINE_SIZE] = { 0, }; |
| char saved_command_line[COMMAND_LINE_SIZE]; |
| |
| static struct resource code_resource = { "Kernel code", 0x100000, 0 }; |
| static struct resource data_resource = { "Kernel data", 0, 0 }; |
| |
| /* |
| * cpu_init() initializes state that is per-CPU. |
| */ |
| void __init cpu_init (void) |
| { |
| int nr = smp_processor_id(); |
| int addr = hard_smp_processor_id(); |
| |
| if (test_and_set_bit(nr,&cpu_initialized)) { |
| printk("CPU#%d ALREADY INITIALIZED!!!!!!!!!\n", nr); |
| for (;;) __sti(); |
| } |
| cpus_initialized++; |
| |
| /* |
| * Store processor id in lowcore (used e.g. in timer_interrupt) |
| */ |
| asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); |
| S390_lowcore.cpu_data.cpu_addr = addr; |
| S390_lowcore.cpu_data.cpu_nr = nr; |
| |
| /* |
| * Force FPU initialization: |
| */ |
| current->flags &= ~PF_USEDFPU; |
| current->used_math = 0; |
| |
| /* Setup active_mm for idle_task */ |
| atomic_inc(&init_mm.mm_count); |
| current->active_mm = &init_mm; |
| if (current->mm) |
| BUG(); |
| enter_lazy_tlb(&init_mm, current, nr); |
| } |
| |
| /* |
| * VM halt and poweroff setup routines |
| */ |
| char vmhalt_cmd[128] = ""; |
| char vmpoff_cmd[128] = ""; |
| |
| static inline void strncpy_skip_quote(char *dst, char *src, int n) |
| { |
| int sx, dx; |
| |
| dx = 0; |
| for (sx = 0; src[sx] != 0; sx++) { |
| if (src[sx] == '"') continue; |
| dst[dx++] = src[sx]; |
| if (dx >= n) break; |
| } |
| } |
| |
| static int __init vmhalt_setup(char *str) |
| { |
| strncpy_skip_quote(vmhalt_cmd, str, 127); |
| vmhalt_cmd[127] = 0; |
| return 1; |
| } |
| |
| __setup("vmhalt=", vmhalt_setup); |
| |
| static int __init vmpoff_setup(char *str) |
| { |
| strncpy_skip_quote(vmpoff_cmd, str, 127); |
| vmpoff_cmd[127] = 0; |
| return 1; |
| } |
| |
| __setup("vmpoff=", vmpoff_setup); |
| |
| /* |
| * 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_device = vdev; |
| return 1; |
| } |
| |
| __setup("condev=", condev_setup); |
| |
| static int __init conmode_setup(char *str) |
| { |
| #if defined(CONFIG_HWC_CONSOLE) |
| if (strncmp(str, "hwc", 4) == 0) |
| SET_CONSOLE_HWC; |
| #endif |
| #if defined(CONFIG_TN3215_CONSOLE) |
| if (strncmp(str, "3215", 5) == 0) |
| SET_CONSOLE_3215; |
| #endif |
| #if defined(CONFIG_TN3270_CONSOLE) |
| if (strncmp(str, "3270", 5) == 0) |
| SET_CONSOLE_3270; |
| #endif |
| return 1; |
| } |
| |
| __setup("conmode=", conmode_setup); |
| |
| static void __init conmode_default(void) |
| { |
| char query_buffer[1024]; |
| char *ptr; |
| |
| if (MACHINE_IS_VM) { |
| cpcmd("QUERY TERM", query_buffer, 1024); |
| 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); |
| if (ptr == NULL) { |
| #if defined(CONFIG_HWC_CONSOLE) |
| SET_CONSOLE_HWC; |
| #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_HWC_CONSOLE) |
| SET_CONSOLE_HWC; |
| #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_HWC_CONSOLE) |
| SET_CONSOLE_HWC; |
| #endif |
| } |
| } else if (MACHINE_IS_P390) { |
| #if defined(CONFIG_TN3215_CONSOLE) |
| SET_CONSOLE_3215; |
| #elif defined(CONFIG_TN3270_CONSOLE) |
| SET_CONSOLE_3270; |
| #endif |
| } else { |
| #if defined(CONFIG_HWC_CONSOLE) |
| SET_CONSOLE_HWC; |
| #endif |
| } |
| } |
| |
| #ifdef CONFIG_SMP |
| extern void machine_restart_smp(char *); |
| extern void machine_halt_smp(void); |
| extern void machine_power_off_smp(void); |
| |
| void (*_machine_restart)(char *command) = machine_restart_smp; |
| void (*_machine_halt)(void) = machine_halt_smp; |
| void (*_machine_power_off)(void) = machine_power_off_smp; |
| #else |
| /* |
| * Reboot, halt and power_off routines for non SMP. |
| */ |
| static void do_machine_restart_nonsmp(char * __unused) |
| { |
| reipl(S390_lowcore.ipl_device); |
| } |
| |
| static void do_machine_halt_nonsmp(void) |
| { |
| if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) |
| cpcmd(vmhalt_cmd, NULL, 0); |
| signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
| } |
| |
| static void do_machine_power_off_nonsmp(void) |
| { |
| if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) |
| cpcmd(vmpoff_cmd, NULL, 0); |
| signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
| } |
| |
| void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; |
| void (*_machine_halt)(void) = do_machine_halt_nonsmp; |
| void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; |
| #endif |
| |
| /* |
| * Reboot, halt and power_off stubs. They just call _machine_restart, |
| * _machine_halt or _machine_power_off. |
| */ |
| |
| void machine_restart(char *command) |
| { |
| _machine_restart(command); |
| } |
| |
| void machine_halt(void) |
| { |
| _machine_halt(); |
| } |
| |
| void machine_power_off(void) |
| { |
| _machine_power_off(); |
| } |
| |
| /* |
| * Setup function called from init/main.c just after the banner |
| * was printed. |
| */ |
| extern char _pstart, _pend, _stext; |
| |
| void __init setup_arch(char **cmdline_p) |
| { |
| unsigned long bootmap_size; |
| unsigned long memory_start, memory_end; |
| char c = ' ', cn, *to = command_line, *from = COMMAND_LINE; |
| struct resource *res; |
| unsigned long start_pfn, end_pfn, max_pfn=0; |
| static unsigned int smptrap=0; |
| unsigned long delay = 0; |
| struct _lowcore *lowcore; |
| int i; |
| static int use_pfix; |
| |
| if (smptrap) |
| return; |
| smptrap=1; |
| |
| /* |
| * print what head.S has found out about the machine |
| */ |
| printk((MACHINE_IS_VM) ? |
| "We are running under VM (31 bit mode)\n" : |
| "We are running native (31 bit mode)\n"); |
| if (MACHINE_IS_VM) |
| printk((MACHINE_HAS_PFIX) ? |
| "This machine has PFIX support\n" : |
| "This machine has no PFIX support\n"); |
| printk((MACHINE_HAS_IEEE) ? |
| "This machine has an IEEE fpu\n" : |
| "This machine has no IEEE fpu\n"); |
| |
| ROOT_DEV = to_kdev_t(0x0100); |
| memory_start = (unsigned long) &_end; /* fixit if use $CODELO etc*/ |
| memory_end = memory_size & ~0x400000UL; /* align memory end to 4MB */ |
| /* |
| * 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; |
| 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; |
| |
| 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; |
| |
| /* Save unparsed command line copy for /proc/cmdline */ |
| memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); |
| saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; |
| |
| for (;;) { |
| /* |
| * "mem=XXX[kKmM]" sets memsize |
| */ |
| if (c == ' ' && strncmp(from, "mem=", 4) == 0) { |
| memory_end = simple_strtoul(from+4, &from, 0); |
| if ( *from == 'K' || *from == 'k' ) { |
| memory_end = memory_end << 10; |
| from++; |
| } else if ( *from == 'M' || *from == 'm' ) { |
| memory_end = memory_end << 20; |
| from++; |
| } |
| } |
| /* |
| * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes |
| */ |
| if (c == ' ' && strncmp(from, "ipldelay=", 9) == 0) { |
| delay = simple_strtoul(from+9, &from, 0); |
| if (*from == 's' || *from == 'S') { |
| delay = delay*1000000; |
| from++; |
| } else if (*from == 'm' || *from == 'M') { |
| delay = delay*60*1000000; |
| from++; |
| } |
| /* now wait for the requested amount of time */ |
| udelay(delay); |
| } |
| /* |
| * "use_pfix" specifies whether we want to fix all pages, |
| * if possible. |
| */ |
| if (c == ' ' && strncmp(from, "use_pfix", 8) == 0) { |
| use_pfix = 1; |
| from += 8; |
| } |
| cn = *(from++); |
| if (!cn) |
| break; |
| if (cn == '\n') |
| cn = ' '; /* replace newlines with space */ |
| if (cn == 0x0d) |
| cn = ' '; /* replace 0x0d with space */ |
| if (cn == ' ' && c == ' ') |
| continue; /* remove additional spaces */ |
| c = cn; |
| if (to - command_line >= COMMAND_LINE_SIZE) |
| break; |
| *(to++) = c; |
| } |
| |
| if (!use_pfix) |
| machine_flags &= ~128; /* MACHINE_HAS_PFIX = 0 */ |
| |
| if (c == ' ' && to > command_line) to--; |
| *to = '\0'; |
| *cmdline_p = command_line; |
| |
| /* |
| * partially used pages are not usable - thus |
| * we are rounding upwards: |
| */ |
| start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| end_pfn = memory_end >> PAGE_SHIFT; |
| |
| /* |
| * Initialize the boot-time allocator (with low memory only): |
| */ |
| bootmap_size = init_bootmem(start_pfn, end_pfn); |
| |
| /* |
| * Register RAM areas with the bootmem allocator. |
| */ |
| for (i = 0; i < 16 && 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) |
| free_bootmem(start_chunk << PAGE_SHIFT, |
| (end_chunk - start_chunk) << PAGE_SHIFT); |
| if (start_chunk + memory_chunk[i].size > max_pfn) |
| max_pfn = start_chunk + memory_chunk[i].size; |
| } |
| |
| /* |
| * 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) { |
| 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 lowcore for boot cpu |
| */ |
| lowcore = (struct _lowcore *) |
| __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); |
| memset(lowcore, 0, PAGE_SIZE); |
| lowcore->restart_psw.mask = _RESTART_PSW_MASK; |
| lowcore->restart_psw.addr = _ADDR_31 + (addr_t) &restart_int_handler; |
| lowcore->external_new_psw.mask = _EXT_PSW_MASK; |
| lowcore->external_new_psw.addr = _ADDR_31 + (addr_t) &ext_int_handler; |
| lowcore->svc_new_psw.mask = _SVC_PSW_MASK; |
| lowcore->svc_new_psw.addr = _ADDR_31 + (addr_t) &system_call; |
| lowcore->program_new_psw.mask = _PGM_PSW_MASK; |
| lowcore->program_new_psw.addr = _ADDR_31 + (addr_t) &pgm_check_handler; |
| lowcore->mcck_new_psw.mask = _MCCK_PSW_MASK; |
| lowcore->mcck_new_psw.addr = _ADDR_31 + (addr_t) &mcck_int_handler; |
| lowcore->io_new_psw.mask = _IO_PSW_MASK; |
| lowcore->io_new_psw.addr = _ADDR_31 + (addr_t) &io_int_handler; |
| lowcore->ipl_device = S390_lowcore.ipl_device; |
| lowcore->kernel_stack = ((__u32) &init_task_union) + 8192; |
| lowcore->async_stack = (__u32) |
| __alloc_bootmem(2*PAGE_SIZE, 2*PAGE_SIZE, 0) + 8192; |
| lowcore->jiffy_timer = -1LL; |
| set_prefix((__u32) lowcore); |
| cpu_init(); |
| boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr; |
| __cpu_logical_map[0] = boot_cpu_addr; |
| |
| /* |
| * Create kernel page tables and switch to virtual addressing. |
| */ |
| paging_init(); |
| |
| if (MACHINE_HAS_PFIX) |
| /* max_pfn may be smaller than memory_end. */ |
| pfix_all_pages(start_pfn, max_pfn); |
| |
| res = alloc_bootmem_low(sizeof(struct resource)); |
| res->start = 0; |
| res->end = memory_end; |
| res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| request_resource(&iomem_resource, res); |
| request_resource(res, &code_resource); |
| request_resource(res, &data_resource); |
| |
| /* 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; |
| |
| if (!n) { |
| seq_printf(m, "vendor_id : IBM/S390\n" |
| "# processors : %i\n" |
| "bogomips per cpu: %lu.%02lu\n", |
| smp_num_cpus, loops_per_jiffy/(500000/HZ), |
| (loops_per_jiffy/(5000/HZ))%100); |
| } |
| if (cpu_online_map & (1 << n)) { |
| cpuinfo = &safe_get_cpu_lowcore(n)->cpu_data; |
| 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); |
| } |
| 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, |
| }; |