diff options
Diffstat (limited to 'arch/s390/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 272 |
1 files changed, 50 insertions, 222 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index c902f059c7a..e3d9325f602 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -37,6 +37,7 @@ #include <linux/kernel_stat.h> #include <linux/device.h> #include <linux/notifier.h> +#include <linux/pfn.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -50,6 +51,12 @@ #include <asm/sections.h> /* + * User copy operations. + */ +struct uaccess_ops uaccess; +EXPORT_SYMBOL_GPL(uaccess); + +/* * Machine setup.. */ unsigned int console_mode = 0; @@ -284,16 +291,9 @@ void (*_machine_power_off)(void) = machine_power_off_smp; /* * Reboot, halt and power_off routines for non SMP. */ -extern void reipl(unsigned long devno); -extern void reipl_diag(void); static void do_machine_restart_nonsmp(char * __unused) { - reipl_diag(); - - if (MACHINE_IS_VM) - cpcmd ("IPL", NULL, 0, NULL); - else - reipl (0x10000 | S390_lowcore.ipl_device); + do_reipl(); } static void do_machine_halt_nonsmp(void) @@ -501,13 +501,47 @@ setup_memory(void) * partially used pages are not usable - thus * we are rounding upwards: */ - start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; - end_pfn = max_pfn = memory_end >> PAGE_SHIFT; + 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 (with low memory only): */ @@ -559,7 +593,7 @@ setup_memory(void) reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); #ifdef CONFIG_BLK_DEV_INITRD - if (INITRD_START) { + if (INITRD_START && INITRD_SIZE) { if (INITRD_START + INITRD_SIZE <= memory_end) { reserve_bootmem(INITRD_START, INITRD_SIZE); initrd_start = INITRD_START; @@ -613,6 +647,11 @@ setup_arch(char **cmdline_p) 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 @@ -720,214 +759,3 @@ struct seq_operations cpuinfo_op = { .show = show_cpuinfo, }; -#define DEFINE_IPL_ATTR(_name, _format, _value) \ -static ssize_t ipl_##_name##_show(struct subsystem *subsys, \ - char *page) \ -{ \ - return sprintf(page, _format, _value); \ -} \ -static struct subsys_attribute ipl_##_name##_attr = \ - __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL); - -DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long) - IPL_PARMBLOCK_START->fcp.wwpn); -DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long) - IPL_PARMBLOCK_START->fcp.lun); -DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long) - IPL_PARMBLOCK_START->fcp.bootprog); -DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long) - IPL_PARMBLOCK_START->fcp.br_lba); - -enum ipl_type_type { - ipl_type_unknown, - ipl_type_ccw, - ipl_type_fcp, -}; - -static enum ipl_type_type -get_ipl_type(void) -{ - struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; - - if (!IPL_DEVNO_VALID) - return ipl_type_unknown; - if (!IPL_PARMBLOCK_VALID) - return ipl_type_ccw; - if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION) - return ipl_type_unknown; - if (ipl->fcp.pbt != IPL_TYPE_FCP) - return ipl_type_unknown; - return ipl_type_fcp; -} - -static ssize_t -ipl_type_show(struct subsystem *subsys, char *page) -{ - switch (get_ipl_type()) { - case ipl_type_ccw: - return sprintf(page, "ccw\n"); - case ipl_type_fcp: - return sprintf(page, "fcp\n"); - default: - return sprintf(page, "unknown\n"); - } -} - -static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type); - -static ssize_t -ipl_device_show(struct subsystem *subsys, char *page) -{ - struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; - - switch (get_ipl_type()) { - case ipl_type_ccw: - return sprintf(page, "0.0.%04x\n", ipl_devno); - case ipl_type_fcp: - return sprintf(page, "0.0.%04x\n", ipl->fcp.devno); - default: - return 0; - } -} - -static struct subsys_attribute ipl_device_attr = - __ATTR(device, S_IRUGO, ipl_device_show, NULL); - -static struct attribute *ipl_fcp_attrs[] = { - &ipl_type_attr.attr, - &ipl_device_attr.attr, - &ipl_wwpn_attr.attr, - &ipl_lun_attr.attr, - &ipl_bootprog_attr.attr, - &ipl_br_lba_attr.attr, - NULL, -}; - -static struct attribute_group ipl_fcp_attr_group = { - .attrs = ipl_fcp_attrs, -}; - -static struct attribute *ipl_ccw_attrs[] = { - &ipl_type_attr.attr, - &ipl_device_attr.attr, - NULL, -}; - -static struct attribute_group ipl_ccw_attr_group = { - .attrs = ipl_ccw_attrs, -}; - -static struct attribute *ipl_unknown_attrs[] = { - &ipl_type_attr.attr, - NULL, -}; - -static struct attribute_group ipl_unknown_attr_group = { - .attrs = ipl_unknown_attrs, -}; - -static ssize_t -ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count) -{ - unsigned int size = IPL_PARMBLOCK_SIZE; - - if (off > size) - return 0; - if (off + count > size) - count = size - off; - - memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count); - return count; -} - -static struct bin_attribute ipl_parameter_attr = { - .attr = { - .name = "binary_parameter", - .mode = S_IRUGO, - .owner = THIS_MODULE, - }, - .size = PAGE_SIZE, - .read = &ipl_parameter_read, -}; - -static ssize_t -ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count) -{ - unsigned int size = IPL_PARMBLOCK_START->fcp.scp_data_len; - void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data; - - if (off > size) - return 0; - if (off + count > size) - count = size - off; - - memcpy(buf, scp_data + off, count); - return count; -} - -static struct bin_attribute ipl_scp_data_attr = { - .attr = { - .name = "scp_data", - .mode = S_IRUGO, - .owner = THIS_MODULE, - }, - .size = PAGE_SIZE, - .read = &ipl_scp_data_read, -}; - -static decl_subsys(ipl, NULL, NULL); - -static int ipl_register_fcp_files(void) -{ - int rc; - - rc = sysfs_create_group(&ipl_subsys.kset.kobj, - &ipl_fcp_attr_group); - if (rc) - goto out; - rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, - &ipl_parameter_attr); - if (rc) - goto out_ipl_parm; - rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, - &ipl_scp_data_attr); - if (!rc) - goto out; - - sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr); - -out_ipl_parm: - sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group); -out: - return rc; -} - -static int __init -ipl_device_sysfs_register(void) { - int rc; - - rc = firmware_register(&ipl_subsys); - if (rc) - goto out; - - switch (get_ipl_type()) { - case ipl_type_ccw: - rc = sysfs_create_group(&ipl_subsys.kset.kobj, - &ipl_ccw_attr_group); - break; - case ipl_type_fcp: - rc = ipl_register_fcp_files(); - break; - default: - rc = sysfs_create_group(&ipl_subsys.kset.kobj, - &ipl_unknown_attr_group); - break; - } - - if (rc) - firmware_unregister(&ipl_subsys); -out: - return rc; -} - -__initcall(ipl_device_sysfs_register); |