*/
#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/mm.h>
#include <linux/types.h>
-#include <linux/time.h>
-#include <linux/spinlock.h>
-#include <linux/bootmem.h>
#include <linux/ioport.h>
-#include <linux/module.h>
#include <linux/efi.h>
-#include <linux/kexec.h>
-#include <asm/setup.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/desc.h>
#include <asm/tlbflush.h>
-
-#define EFI_DEBUG 0
-#define PFX "EFI: "
-
-extern efi_status_t asmlinkage efi_call_phys(void *, ...);
-
-struct efi efi;
-EXPORT_SYMBOL(efi);
-static struct efi efi_phys;
-struct efi_memory_map memmap;
-
-/*
- * We require an early boot_ioremap mapping mechanism initially
- */
-extern void * boot_ioremap(unsigned long, unsigned long);
+#include <asm/efi.h>
/*
* To make EFI call EFI runtime service in physical addressing mode we need
*/
static unsigned long efi_rt_eflags;
-static DEFINE_SPINLOCK(efi_rt_lock);
static pgd_t efi_bak_pg_dir_pointer[2];
-static void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
+void efi_call_phys_prelog(void)
{
unsigned long cr4;
unsigned long temp;
- struct Xgt_desc_struct gdt_descr;
+ struct desc_ptr gdt_descr;
- spin_lock(&efi_rt_lock);
local_irq_save(efi_rt_eflags);
/*
/*
* After the lock is released, the original page table is restored.
*/
- local_flush_tlb();
+ __flush_tlb_all();
gdt_descr.address = __pa(get_cpu_gdt_table(0));
gdt_descr.size = GDT_SIZE - 1;
load_gdt(&gdt_descr);
}
-static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
+void efi_call_phys_epilog(void)
{
unsigned long cr4;
- struct Xgt_desc_struct gdt_descr;
+ struct desc_ptr gdt_descr;
gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
gdt_descr.size = GDT_SIZE - 1;
/*
* After the lock is released, the original page table is restored.
*/
- local_flush_tlb();
+ __flush_tlb_all();
local_irq_restore(efi_rt_eflags);
- spin_unlock(&efi_rt_lock);
-}
-
-static efi_status_t
-phys_efi_set_virtual_address_map(unsigned long memory_map_size,
- unsigned long descriptor_size,
- u32 descriptor_version,
- efi_memory_desc_t *virtual_map)
-{
- efi_status_t status;
-
- efi_call_phys_prelog();
- status = efi_call_phys(efi_phys.set_virtual_address_map,
- memory_map_size, descriptor_size,
- descriptor_version, virtual_map);
- efi_call_phys_epilog();
- return status;
-}
-
-static efi_status_t
-phys_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
-{
- efi_status_t status;
-
- efi_call_phys_prelog();
- status = efi_call_phys(efi_phys.get_time, tm, tc);
- efi_call_phys_epilog();
- return status;
-}
-
-inline int efi_set_rtc_mmss(unsigned long nowtime)
-{
- int real_seconds, real_minutes;
- efi_status_t status;
- efi_time_t eft;
- efi_time_cap_t cap;
-
- spin_lock(&efi_rt_lock);
- status = efi.get_time(&eft, &cap);
- spin_unlock(&efi_rt_lock);
- if (status != EFI_SUCCESS)
- panic("Ooops, efitime: can't read time!\n");
- real_seconds = nowtime % 60;
- real_minutes = nowtime / 60;
-
- if (((abs(real_minutes - eft.minute) + 15)/30) & 1)
- real_minutes += 30;
- real_minutes %= 60;
-
- eft.minute = real_minutes;
- eft.second = real_seconds;
-
- if (status != EFI_SUCCESS) {
- printk("Ooops: efitime: can't read time!\n");
- return -1;
- }
- return 0;
-}
-/*
- * This is used during kernel init before runtime
- * services have been remapped and also during suspend, therefore,
- * we'll need to call both in physical and virtual modes.
- */
-inline unsigned long efi_get_time(void)
-{
- efi_status_t status;
- efi_time_t eft;
- efi_time_cap_t cap;
-
- if (efi.get_time) {
- /* if we are in virtual mode use remapped function */
- status = efi.get_time(&eft, &cap);
- } else {
- /* we are in physical mode */
- status = phys_efi_get_time(&eft, &cap);
- }
-
- if (status != EFI_SUCCESS)
- printk("Oops: efitime: can't read time status: 0x%lx\n",status);
-
- return mktime(eft.year, eft.month, eft.day, eft.hour,
- eft.minute, eft.second);
-}
-
-int is_available_memory(efi_memory_desc_t * md)
-{
- if (!(md->attribute & EFI_MEMORY_WB))
- return 0;
-
- switch (md->type) {
- case EFI_LOADER_CODE:
- case EFI_LOADER_DATA:
- case EFI_BOOT_SERVICES_CODE:
- case EFI_BOOT_SERVICES_DATA:
- case EFI_CONVENTIONAL_MEMORY:
- return 1;
- }
- return 0;
-}
-
-/*
- * We need to map the EFI memory map again after paging_init().
- */
-void __init efi_map_memmap(void)
-{
- memmap.map = NULL;
-
- memmap.map = bt_ioremap((unsigned long) memmap.phys_map,
- (memmap.nr_map * memmap.desc_size));
- if (memmap.map == NULL)
- printk(KERN_ERR PFX "Could not remap the EFI memmap!\n");
-
- memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
-}
-
-#if EFI_DEBUG
-static void __init print_efi_memmap(void)
-{
- efi_memory_desc_t *md;
- void *p;
- int i;
-
- for (p = memmap.map, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) {
- md = p;
- printk(KERN_INFO "mem%02u: type=%u, attr=0x%llx, "
- "range=[0x%016llx-0x%016llx) (%lluMB)\n",
- i, md->type, md->attribute, md->phys_addr,
- md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
- (md->num_pages >> (20 - EFI_PAGE_SHIFT)));
- }
-}
-#endif /* EFI_DEBUG */
-
-/*
- * Walks the EFI memory map and calls CALLBACK once for each EFI
- * memory descriptor that has memory that is available for kernel use.
- */
-void efi_memmap_walk(efi_freemem_callback_t callback, void *arg)
-{
- int prev_valid = 0;
- struct range {
- unsigned long start;
- unsigned long end;
- } uninitialized_var(prev), curr;
- efi_memory_desc_t *md;
- unsigned long start, end;
- void *p;
-
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
-
- if ((md->num_pages == 0) || (!is_available_memory(md)))
- continue;
-
- curr.start = md->phys_addr;
- curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
-
- if (!prev_valid) {
- prev = curr;
- prev_valid = 1;
- } else {
- if (curr.start < prev.start)
- printk(KERN_INFO PFX "Unordered memory map\n");
- if (prev.end == curr.start)
- prev.end = curr.end;
- else {
- start =
- (unsigned long) (PAGE_ALIGN(prev.start));
- end = (unsigned long) (prev.end & PAGE_MASK);
- if ((end > start)
- && (*callback) (start, end, arg) < 0)
- return;
- prev = curr;
- }
- }
- }
- if (prev_valid) {
- start = (unsigned long) PAGE_ALIGN(prev.start);
- end = (unsigned long) (prev.end & PAGE_MASK);
- if (end > start)
- (*callback) (start, end, arg);
- }
-}
-
-void __init efi_init(void)
-{
- efi_config_table_t *config_tables;
- efi_runtime_services_t *runtime;
- efi_char16_t *c16;
- char vendor[100] = "unknown";
- unsigned long num_config_tables;
- int i = 0;
-
- memset(&efi, 0, sizeof(efi) );
- memset(&efi_phys, 0, sizeof(efi_phys));
-
- efi_phys.systab = EFI_SYSTAB;
- memmap.phys_map = EFI_MEMMAP;
- memmap.nr_map = EFI_MEMMAP_SIZE/EFI_MEMDESC_SIZE;
- memmap.desc_version = EFI_MEMDESC_VERSION;
- memmap.desc_size = EFI_MEMDESC_SIZE;
-
- efi.systab = (efi_system_table_t *)
- boot_ioremap((unsigned long) efi_phys.systab,
- sizeof(efi_system_table_t));
- /*
- * Verify the EFI Table
- */
- if (efi.systab == NULL)
- printk(KERN_ERR PFX "Woah! Couldn't map the EFI system table.\n");
- if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
- printk(KERN_ERR PFX "Woah! EFI system table signature incorrect\n");
- if ((efi.systab->hdr.revision >> 16) == 0)
- printk(KERN_ERR PFX "Warning: EFI system table version "
- "%d.%02d, expected 1.00 or greater\n",
- efi.systab->hdr.revision >> 16,
- efi.systab->hdr.revision & 0xffff);
-
- /*
- * Grab some details from the system table
- */
- num_config_tables = efi.systab->nr_tables;
- config_tables = (efi_config_table_t *)efi.systab->tables;
- runtime = efi.systab->runtime;
-
- /*
- * Show what we know for posterity
- */
- c16 = (efi_char16_t *) boot_ioremap(efi.systab->fw_vendor, 2);
- if (c16) {
- for (i = 0; i < (sizeof(vendor) - 1) && *c16; ++i)
- vendor[i] = *c16++;
- vendor[i] = '\0';
- } else
- printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
-
- printk(KERN_INFO PFX "EFI v%u.%.02u by %s \n",
- efi.systab->hdr.revision >> 16,
- efi.systab->hdr.revision & 0xffff, vendor);
-
- /*
- * Let's see what config tables the firmware passed to us.
- */
- config_tables = (efi_config_table_t *)
- boot_ioremap((unsigned long) config_tables,
- num_config_tables * sizeof(efi_config_table_t));
-
- if (config_tables == NULL)
- printk(KERN_ERR PFX "Could not map EFI Configuration Table!\n");
-
- efi.mps = EFI_INVALID_TABLE_ADDR;
- efi.acpi = EFI_INVALID_TABLE_ADDR;
- efi.acpi20 = EFI_INVALID_TABLE_ADDR;
- efi.smbios = EFI_INVALID_TABLE_ADDR;
- efi.sal_systab = EFI_INVALID_TABLE_ADDR;
- efi.boot_info = EFI_INVALID_TABLE_ADDR;
- efi.hcdp = EFI_INVALID_TABLE_ADDR;
- efi.uga = EFI_INVALID_TABLE_ADDR;
-
- for (i = 0; i < num_config_tables; i++) {
- if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
- efi.mps = config_tables[i].table;
- printk(KERN_INFO " MPS=0x%lx ", config_tables[i].table);
- } else
- if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
- efi.acpi20 = config_tables[i].table;
- printk(KERN_INFO " ACPI 2.0=0x%lx ", config_tables[i].table);
- } else
- if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
- efi.acpi = config_tables[i].table;
- printk(KERN_INFO " ACPI=0x%lx ", config_tables[i].table);
- } else
- if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
- efi.smbios = config_tables[i].table;
- printk(KERN_INFO " SMBIOS=0x%lx ", config_tables[i].table);
- } else
- if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
- efi.hcdp = config_tables[i].table;
- printk(KERN_INFO " HCDP=0x%lx ", config_tables[i].table);
- } else
- if (efi_guidcmp(config_tables[i].guid, UGA_IO_PROTOCOL_GUID) == 0) {
- efi.uga = config_tables[i].table;
- printk(KERN_INFO " UGA=0x%lx ", config_tables[i].table);
- }
- }
- printk("\n");
-
- /*
- * Check out the runtime services table. We need to map
- * the runtime services table so that we can grab the physical
- * address of several of the EFI runtime functions, needed to
- * set the firmware into virtual mode.
- */
-
- runtime = (efi_runtime_services_t *) boot_ioremap((unsigned long)
- runtime,
- sizeof(efi_runtime_services_t));
- if (runtime != NULL) {
- /*
- * We will only need *early* access to the following
- * two EFI runtime services before set_virtual_address_map
- * is invoked.
- */
- efi_phys.get_time = (efi_get_time_t *) runtime->get_time;
- efi_phys.set_virtual_address_map =
- (efi_set_virtual_address_map_t *)
- runtime->set_virtual_address_map;
- } else
- printk(KERN_ERR PFX "Could not map the runtime service table!\n");
-
- /* Map the EFI memory map for use until paging_init() */
- memmap.map = boot_ioremap((unsigned long) EFI_MEMMAP, EFI_MEMMAP_SIZE);
- if (memmap.map == NULL)
- printk(KERN_ERR PFX "Could not map the EFI memory map!\n");
-
- memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
-
-#if EFI_DEBUG
- print_efi_memmap();
-#endif
-}
-
-static inline void __init check_range_for_systab(efi_memory_desc_t *md)
-{
- if (((unsigned long)md->phys_addr <= (unsigned long)efi_phys.systab) &&
- ((unsigned long)efi_phys.systab < md->phys_addr +
- ((unsigned long)md->num_pages << EFI_PAGE_SHIFT))) {
- unsigned long addr;
-
- addr = md->virt_addr - md->phys_addr +
- (unsigned long)efi_phys.systab;
- efi.systab = (efi_system_table_t *)addr;
- }
-}
-
-/*
- * Wrap all the virtual calls in a way that forces the parameters on the stack.
- */
-
-#define efi_call_virt(f, args...) \
- ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
-
-static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
-{
- return efi_call_virt(get_time, tm, tc);
-}
-
-static efi_status_t virt_efi_set_time (efi_time_t *tm)
-{
- return efi_call_virt(set_time, tm);
-}
-
-static efi_status_t virt_efi_get_wakeup_time (efi_bool_t *enabled,
- efi_bool_t *pending,
- efi_time_t *tm)
-{
- return efi_call_virt(get_wakeup_time, enabled, pending, tm);
-}
-
-static efi_status_t virt_efi_set_wakeup_time (efi_bool_t enabled,
- efi_time_t *tm)
-{
- return efi_call_virt(set_wakeup_time, enabled, tm);
-}
-
-static efi_status_t virt_efi_get_variable (efi_char16_t *name,
- efi_guid_t *vendor, u32 *attr,
- unsigned long *data_size, void *data)
-{
- return efi_call_virt(get_variable, name, vendor, attr, data_size, data);
-}
-
-static efi_status_t virt_efi_get_next_variable (unsigned long *name_size,
- efi_char16_t *name,
- efi_guid_t *vendor)
-{
- return efi_call_virt(get_next_variable, name_size, name, vendor);
-}
-
-static efi_status_t virt_efi_set_variable (efi_char16_t *name,
- efi_guid_t *vendor,
- unsigned long attr,
- unsigned long data_size, void *data)
-{
- return efi_call_virt(set_variable, name, vendor, attr, data_size, data);
-}
-
-static efi_status_t virt_efi_get_next_high_mono_count (u32 *count)
-{
- return efi_call_virt(get_next_high_mono_count, count);
-}
-
-static void virt_efi_reset_system (int reset_type, efi_status_t status,
- unsigned long data_size,
- efi_char16_t *data)
-{
- efi_call_virt(reset_system, reset_type, status, data_size, data);
-}
-
-/*
- * This function will switch the EFI runtime services to virtual mode.
- * Essentially, look through the EFI memmap and map every region that
- * has the runtime attribute bit set in its memory descriptor and update
- * that memory descriptor with the virtual address obtained from ioremap().
- * This enables the runtime services to be called without having to
- * thunk back into physical mode for every invocation.
- */
-
-void __init efi_enter_virtual_mode(void)
-{
- efi_memory_desc_t *md;
- efi_status_t status;
- void *p;
-
- efi.systab = NULL;
-
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
-
- if (!(md->attribute & EFI_MEMORY_RUNTIME))
- continue;
-
- md->virt_addr = (unsigned long)ioremap(md->phys_addr,
- md->num_pages << EFI_PAGE_SHIFT);
- if (!(unsigned long)md->virt_addr) {
- printk(KERN_ERR PFX "ioremap of 0x%lX failed\n",
- (unsigned long)md->phys_addr);
- }
- /* update the virtual address of the EFI system table */
- check_range_for_systab(md);
- }
-
- BUG_ON(!efi.systab);
-
- status = phys_efi_set_virtual_address_map(
- memmap.desc_size * memmap.nr_map,
- memmap.desc_size,
- memmap.desc_version,
- memmap.phys_map);
-
- if (status != EFI_SUCCESS) {
- printk (KERN_ALERT "You are screwed! "
- "Unable to switch EFI into virtual mode "
- "(status=%lx)\n", status);
- panic("EFI call to SetVirtualAddressMap() failed!");
- }
-
- /*
- * Now that EFI is in virtual mode, update the function
- * pointers in the runtime service table to the new virtual addresses.
- */
-
- efi.get_time = virt_efi_get_time;
- efi.set_time = virt_efi_set_time;
- efi.get_wakeup_time = virt_efi_get_wakeup_time;
- efi.set_wakeup_time = virt_efi_set_wakeup_time;
- efi.get_variable = virt_efi_get_variable;
- efi.get_next_variable = virt_efi_get_next_variable;
- efi.set_variable = virt_efi_set_variable;
- efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
- efi.reset_system = virt_efi_reset_system;
-}
-
-void __init
-efi_initialize_iomem_resources(struct resource *code_resource,
- struct resource *data_resource)
-{
- struct resource *res;
- efi_memory_desc_t *md;
- void *p;
-
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
-
- if ((md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >
- 0x100000000ULL)
- continue;
- res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
- switch (md->type) {
- case EFI_RESERVED_TYPE:
- res->name = "Reserved Memory";
- break;
- case EFI_LOADER_CODE:
- res->name = "Loader Code";
- break;
- case EFI_LOADER_DATA:
- res->name = "Loader Data";
- break;
- case EFI_BOOT_SERVICES_DATA:
- res->name = "BootServices Data";
- break;
- case EFI_BOOT_SERVICES_CODE:
- res->name = "BootServices Code";
- break;
- case EFI_RUNTIME_SERVICES_CODE:
- res->name = "Runtime Service Code";
- break;
- case EFI_RUNTIME_SERVICES_DATA:
- res->name = "Runtime Service Data";
- break;
- case EFI_CONVENTIONAL_MEMORY:
- res->name = "Conventional Memory";
- break;
- case EFI_UNUSABLE_MEMORY:
- res->name = "Unusable Memory";
- break;
- case EFI_ACPI_RECLAIM_MEMORY:
- res->name = "ACPI Reclaim";
- break;
- case EFI_ACPI_MEMORY_NVS:
- res->name = "ACPI NVS";
- break;
- case EFI_MEMORY_MAPPED_IO:
- res->name = "Memory Mapped IO";
- break;
- case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
- res->name = "Memory Mapped IO Port Space";
- break;
- default:
- res->name = "Reserved";
- break;
- }
- res->start = md->phys_addr;
- res->end = res->start + ((md->num_pages << EFI_PAGE_SHIFT) - 1);
- res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
- if (request_resource(&iomem_resource, res) < 0)
- printk(KERN_ERR PFX "Failed to allocate res %s : "
- "0x%llx-0x%llx\n", res->name,
- (unsigned long long)res->start,
- (unsigned long long)res->end);
- /*
- * We don't know which region contains kernel data so we try
- * it repeatedly and let the resource manager test it.
- */
- if (md->type == EFI_CONVENTIONAL_MEMORY) {
- request_resource(res, code_resource);
- request_resource(res, data_resource);
-#ifdef CONFIG_KEXEC
- request_resource(res, &crashk_res);
-#endif
- }
- }
-}
-
-/*
- * Convenience functions to obtain memory types and attributes
- */
-
-u32 efi_mem_type(unsigned long phys_addr)
-{
- efi_memory_desc_t *md;
- void *p;
-
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
- if ((md->phys_addr <= phys_addr) && (phys_addr <
- (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
- return md->type;
- }
- return 0;
-}
-
-u64 efi_mem_attributes(unsigned long phys_addr)
-{
- efi_memory_desc_t *md;
- void *p;
-
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
- if ((md->phys_addr <= phys_addr) && (phys_addr <
- (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
- return md->attribute;
- }
- return 0;
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff