patch-2.3.43 linux/arch/ia64/kernel/efi.c

• Lines: 366
• Date: Tue Feb 8 12:01:59 2000
• Orig file: v2.3.42/linux/arch/ia64/kernel/efi.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/arch/ia64/kernel/efi.c linux/arch/ia64/kernel/efi.c
@@ -0,0 +1,365 @@
+/*
+ * Extensible Firmware Interface
+ *
+ * Based on Extensible Firmware Interface Specification version 0.9 April 30, 1999
+ *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ * Copyright (C) 1999 Hewlett-Packard Co.
+ * Copyright (C) 1999 David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
+ *
+ * All EFI Runtime Services are not implemented yet as EFI only
+ * supports physical mode addressing on SoftSDV. This is to be fixed
+ * in a future version.  --drummond 1999-07-20
+ *
+ * Implemented EFI runtime services and virtual mode calls.  --davidm
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/time.h>
+
+#include <asm/efi.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+
+#define EFI_DEBUG
+
+extern efi_status_t efi_call_phys (void *, ...);
+
+struct efi efi;
+		    
+static efi_runtime_services_t *runtime;
+
+static efi_status_t
+phys_get_time (efi_time_t *tm, efi_time_cap_t *tc)
+{
+	return efi_call_phys(__va(runtime->get_time), __pa(tm), __pa(tc));
+}
+
+static efi_status_t
+phys_set_time (efi_time_t *tm)
+{
+	return efi_call_phys(__va(runtime->set_time), __pa(tm));
+}
+
+static efi_status_t
+phys_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm)
+{
+	return efi_call_phys(__va(runtime->get_wakeup_time), __pa(enabled), __pa(pending),
+			     __pa(tm));
+}
+
+static efi_status_t
+phys_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm)
+{
+	return efi_call_phys(__va(runtime->set_wakeup_time), enabled, __pa(tm));
+}
+
+static efi_status_t
+phys_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
+		   unsigned long *data_size, void *data)
+{
+	return efi_call_phys(__va(runtime->get_variable), __pa(name), __pa(vendor), __pa(attr),
+			     __pa(data_size), __pa(data));
+}
+
+static efi_status_t
+phys_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor)
+{
+	return efi_call_phys(__va(runtime->get_next_variable), __pa(name_size), __pa(name),
+			     __pa(vendor));
+}
+
+static efi_status_t
+phys_set_variable (efi_char16_t *name, efi_guid_t *vendor, u32 attr,
+		   unsigned long data_size, void *data)
+{
+	return efi_call_phys(__va(runtime->set_variable), __pa(name), __pa(vendor), attr,
+			     data_size, __pa(data));
+}
+
+static efi_status_t
+phys_get_next_high_mono_count (u64 *count)
+{
+	return efi_call_phys(__va(runtime->get_next_high_mono_count), __pa(count));
+}
+
+static void
+phys_reset_system (int reset_type, efi_status_t status,
+		   unsigned long data_size, efi_char16_t *data)
+{
+	efi_call_phys(__va(runtime->reset_system), status, data_size, __pa(data));
+}
+
+/*
+ * Converts Gregorian date to seconds since 1970-01-01 00:00:00.
+ * Assumes input in normal date format, i.e. 1980-12-31 23:59:59
+ * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
+ *
+ * [For the Julian calendar (which was used in Russia before 1917,
+ * Britain & colonies before 1752, anywhere else before 1582,
+ * and is still in use by some communities) leave out the
+ * -year/100+year/400 terms, and add 10.]
+ *
+ * This algorithm was first published by Gauss (I think).
+ *
+ * WARNING: this function will overflow on 2106-02-07 06:28:16 on
+ * machines were long is 32-bit! (However, as time_t is signed, we
+ * will already get problems at other places on 2038-01-19 03:14:08)
+ */
+static inline unsigned long 
+mktime (unsigned int year, unsigned int mon, unsigned int day, unsigned int hour,
+	unsigned int min, unsigned int sec)
+{
+        if (0 >= (int) (mon -= 2)) {    /* 1..12 -> 11,12,1..10 */
+                mon += 12;      /* Puts Feb last since it has leap day */
+                year -= 1;
+        }
+        return ((((unsigned long)(year/4 - year/100 + year/400 + 367*mon/12 + day)
+		  + year*365 - 719499
+		)*24 + hour /* now have hours */
+		)*60 + min /* now have minutes */
+		)*60 + sec; /* finally seconds */
+}
+
+void
+efi_gettimeofday (struct timeval *tv)
+{
+	efi_time_t tm;
+
+	memset(tv, 0, sizeof(tv));
+	if ((*efi.get_time)(&tm, 0) != EFI_SUCCESS)
+		return;
+
+	tv->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
+	tv->tv_usec = tm.nanosecond / 1000;
+}
+
+/*
+ * Walks the EFI memory map and calls CALLBACK once for each EFI
+ * memory descriptor that has memory that is available for OS use.
+ */
+void
+efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
+{
+	int prev_valid = 0;
+	struct range {
+		u64 start;
+		u64 end;
+	} prev, curr;
+	void *efi_map_start, *efi_map_end, *p;
+	efi_memory_desc_t *md;
+	u64 efi_desc_size, start, end;
+
+	efi_map_start = __va(ia64_boot_param.efi_memmap);
+	efi_map_end   = efi_map_start + ia64_boot_param.efi_memmap_size;
+	efi_desc_size = ia64_boot_param.efi_memdesc_size;
+
+	for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+		md = p;
+		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:
+#ifndef CONFIG_IA64_VIRTUAL_MEM_MAP
+			if (md->phys_addr > 1024*1024*1024UL) {
+				printk("Warning: ignoring %luMB of memory above 1GB!\n",
+				       md->num_pages >> 8);
+				md->type = EFI_UNUSABLE_MEMORY;
+				continue;
+			}
+#endif
+
+			curr.start = PAGE_OFFSET + md->phys_addr;
+			curr.end   = curr.start + (md->num_pages << 12);
+
+			if (!prev_valid) {
+				prev = curr;
+				prev_valid = 1;
+			} else {
+				if (curr.start < prev.start)
+					printk("Oops: EFI memory table not ordered!\n");
+
+				if (prev.end == curr.start) {
+					/* merge two consecutive memory ranges */
+					prev.end = curr.end;
+				} else {
+					start = PAGE_ALIGN(prev.start);
+					end = prev.end & PAGE_MASK;
+					if ((end > start) && (*callback)(start, end, arg) < 0)
+						return;
+					prev = curr;
+				}
+			}
+			break;
+
+		      default:
+			continue;
+		}
+	}
+	if (prev_valid) {
+		start = PAGE_ALIGN(prev.start);
+		end = prev.end & PAGE_MASK;
+		if (end > start)
+			(*callback)(start, end, arg);
+	}
+}
+
+void __init 
+efi_init (void)
+{
+	void *efi_map_start, *efi_map_end, *p;
+	efi_config_table_t *config_tables;
+	efi_memory_desc_t *md;
+	efi_char16_t *c16;
+	u64 efi_desc_size;
+	char vendor[100] = "unknown";
+	int i;
+
+	efi.systab = __va(ia64_boot_param.efi_systab);
+
+	/*
+	 * Verify the EFI Table
+ 	 */
+	if (efi.systab == NULL) 
+		panic("Woah! Can't find EFI system table.\n");
+	if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) 
+		panic("Woah! EFI system table signature incorrect\n");
+	if (efi.systab->hdr.revision != EFI_SYSTEM_TABLE_REVISION)
+		printk("Warning: EFI system table version mismatch: "
+		       "got %d.%02d, expected %d.%02d\n",
+		       efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
+		       EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
+
+	config_tables = __va(efi.systab->tables);
+
+	/* Show what we know for posterity */
+	c16 = __va(efi.systab->fw_vendor);
+	if (c16) {
+		for (i = 0;i < sizeof(vendor) && *c16; ++i)
+			vendor[i] = *c16++;
+		vendor[i] = '\0';
+	}
+
+	printk("EFI v%u.%.02u by %s:",
+	       efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
+
+	for (i = 0; i < efi.systab->nr_tables; i++) {
+		if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
+			efi.mps = __va(config_tables[i].table);
+			printk(" MPS=0x%lx", config_tables[i].table);
+		} else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
+			efi.acpi = __va(config_tables[i].table);
+			printk(" ACPI=0x%lx", config_tables[i].table);
+		} else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
+			efi.smbios = __va(config_tables[i].table);
+			printk(" SMBIOS=0x%lx", config_tables[i].table);
+		} else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
+			efi.sal_systab = __va(config_tables[i].table);
+			printk(" SALsystab=0x%lx", config_tables[i].table);
+		}
+	}
+	printk("\n");
+
+	runtime = __va(efi.systab->runtime);
+	efi.get_time = phys_get_time;
+	efi.set_time = phys_set_time;
+	efi.get_wakeup_time = phys_get_wakeup_time;
+	efi.set_wakeup_time = phys_set_wakeup_time;
+	efi.get_variable = phys_get_variable;
+	efi.get_next_variable = phys_get_next_variable;
+	efi.set_variable = phys_set_variable;
+	efi.get_next_high_mono_count = phys_get_next_high_mono_count;
+	efi.reset_system = phys_reset_system;
+
+	efi_map_start = __va(ia64_boot_param.efi_memmap);
+	efi_map_end   = efi_map_start + ia64_boot_param.efi_memmap_size;
+	efi_desc_size = ia64_boot_param.efi_memdesc_size;
+
+#ifdef EFI_DEBUG
+	/* print EFI memory map: */
+	for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
+		md = p;
+		printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
+		       i, md->type, md->attribute,
+		       md->phys_addr, md->phys_addr + (md->num_pages<<12) - 1, md->num_pages >> 8);
+	}
+#endif
+}
+
+void
+efi_enter_virtual_mode (void)
+{
+	void *efi_map_start, *efi_map_end, *p;
+	efi_memory_desc_t *md;
+	efi_status_t status;
+	u64 efi_desc_size;
+
+	efi_map_start = __va(ia64_boot_param.efi_memmap);
+	efi_map_end   = efi_map_start + ia64_boot_param.efi_memmap_size;
+	efi_desc_size = ia64_boot_param.efi_memdesc_size;
+
+	for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+		md = p;
+		if (md->attribute & EFI_MEMORY_RUNTIME) {
+			/*
+			 * Some descriptors have multiple bits set, so the order of
+			 * the tests is relevant.
+			 */
+			if (md->attribute & EFI_MEMORY_WB) {
+				md->virt_addr = (u64) __va(md->phys_addr);
+			} else if (md->attribute & EFI_MEMORY_UC) {
+				md->virt_addr = (u64) ioremap(md->phys_addr, 0);
+			} else if (md->attribute & EFI_MEMORY_WC) {
+#if 0
+				md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
+									   | _PAGE_D
+									   | _PAGE_MA_WC
+									   | _PAGE_PL_0
+									   | _PAGE_AR_RW));
+#else
+				printk("EFI_MEMORY_WC mapping\n");
+				md->virt_addr = (u64) ioremap(md->phys_addr, 0);
+#endif
+			} else if (md->attribute & EFI_MEMORY_WT) {
+#if 0
+				md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
+									   | _PAGE_D | _PAGE_MA_WT
+									   | _PAGE_PL_0
+									   | _PAGE_AR_RW));
+#else
+				printk("EFI_MEMORY_WT mapping\n");
+				md->virt_addr = (u64) ioremap(md->phys_addr, 0);
+#endif
+			}
+		}
+	}
+
+	status = efi_call_phys(__va(runtime->set_virtual_address_map),
+			       ia64_boot_param.efi_memmap_size,
+			       efi_desc_size, ia64_boot_param.efi_memdesc_version,
+			       ia64_boot_param.efi_memmap);
+	if (status != EFI_SUCCESS) {
+		printk("Warning: unable to switch EFI into virtual mode (status=%lu)\n", status);
+		return;
+	}
+
+	/*
+	 * Now that EFI is in virtual mode, we arrange for EFI functions to be
+	 * called directly:
+	 */
+	efi.get_time = __va(runtime->get_time);
+	efi.set_time = __va(runtime->set_time);
+	efi.get_wakeup_time = __va(runtime->get_wakeup_time);
+	efi.set_wakeup_time = __va(runtime->set_wakeup_time);
+	efi.get_variable = __va(runtime->get_variable);
+	efi.get_next_variable = __va(runtime->get_next_variable);
+	efi.set_variable = __va(runtime->set_variable);
+	efi.get_next_high_mono_count = __va(runtime->get_next_high_mono_count);
+	efi.reset_system = __va(runtime->reset_system);
+}