X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Fefi.c;h=1119d247fe11d87aceaa2e42f770bd773a9c1ea2;hb=237b6f33291394c337ae84e2d3782d5605803af2;hp=174b067b9d03a5aa2c4dfc3824449a32f5d1047d;hpb=bed23c67fe077b4d66cb3329263d7cfa33b3fd67;p=safe%2Fjmp%2Flinux-2.6

diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index 174b067..1119d24 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -54,7 +54,7 @@ EXPORT_SYMBOL(efi);
 
 struct efi_memory_map memmap;
 
-struct efi efi_phys __initdata;
+static struct efi efi_phys __initdata;
 static efi_system_table_t efi_systab __initdata;
 
 static int __init setup_noefi(char *arg)
@@ -64,6 +64,17 @@ static int __init setup_noefi(char *arg)
 }
 early_param("noefi", setup_noefi);
 
+int add_efi_memmap;
+EXPORT_SYMBOL(add_efi_memmap);
+
+static int __init setup_add_efi_memmap(char *arg)
+{
+	add_efi_memmap = 1;
+	return 0;
+}
+early_param("add_efi_memmap", setup_add_efi_memmap);
+
+
 static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
 {
 	return efi_call_virt2(get_time, tm, tc);
@@ -213,6 +224,50 @@ unsigned long efi_get_time(void)
 		      eft.minute, eft.second);
 }
 
+/*
+ * Tell the kernel about the EFI memory map.  This might include
+ * more than the max 128 entries that can fit in the e820 legacy
+ * (zeropage) memory map.
+ */
+
+static void __init do_add_efi_memmap(void)
+{
+	void *p;
+
+	for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+		efi_memory_desc_t *md = p;
+		unsigned long long start = md->phys_addr;
+		unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
+		int e820_type;
+
+		if (md->attribute & EFI_MEMORY_WB)
+			e820_type = E820_RAM;
+		else
+			e820_type = E820_RESERVED;
+		e820_add_region(start, size, e820_type);
+	}
+	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
+}
+
+void __init efi_reserve_early(void)
+{
+	unsigned long pmap;
+
+#ifdef CONFIG_X86_32
+	pmap = boot_params.efi_info.efi_memmap;
+#else
+	pmap = (boot_params.efi_info.efi_memmap |
+		((__u64)boot_params.efi_info.efi_memmap_hi<<32));
+#endif
+	memmap.phys_map = (void *)pmap;
+	memmap.nr_map = boot_params.efi_info.efi_memmap_size /
+		boot_params.efi_info.efi_memdesc_size;
+	memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
+	memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
+	reserve_early(pmap, pmap + memmap.nr_map * memmap.desc_size,
+		      "EFI memmap");
+}
+
 #if EFI_DEBUG
 static void __init print_efi_memmap(void)
 {
@@ -244,19 +299,11 @@ void __init efi_init(void)
 
 #ifdef CONFIG_X86_32
 	efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
-	memmap.phys_map = (void *)boot_params.efi_info.efi_memmap;
 #else
 	efi_phys.systab = (efi_system_table_t *)
 		(boot_params.efi_info.efi_systab |
 		 ((__u64)boot_params.efi_info.efi_systab_hi<<32));
-	memmap.phys_map = (void *)
-		(boot_params.efi_info.efi_memmap |
-		 ((__u64)boot_params.efi_info.efi_memmap_hi<<32));
 #endif
-	memmap.nr_map = boot_params.efi_info.efi_memmap_size /
-		boot_params.efi_info.efi_memdesc_size;
-	memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
-	memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
 
 	efi.systab = early_ioremap((unsigned long)efi_phys.systab,
 				   sizeof(efi_system_table_t));
@@ -320,6 +367,10 @@ void __init efi_init(void)
 			efi.smbios = config_tables[i].table;
 			printk(" SMBIOS=0x%lx ", config_tables[i].table);
 		} else if (!efi_guidcmp(config_tables[i].guid,
+					UV_SYSTEM_TABLE_GUID)) {
+			efi.uv_systab = config_tables[i].table;
+			printk(" UVsystab=0x%lx ", config_tables[i].table);
+		} else if (!efi_guidcmp(config_tables[i].guid,
 					HCDP_TABLE_GUID)) {
 			efi.hcdp = config_tables[i].table;
 			printk(" HCDP=0x%lx ", config_tables[i].table);
@@ -367,9 +418,13 @@ void __init efi_init(void)
 	if (memmap.map == NULL)
 		printk(KERN_ERR "Could not map the EFI memory map!\n");
 	memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
+
 	if (memmap.desc_size != sizeof(efi_memory_desc_t))
-		printk(KERN_WARNING "Kernel-defined memdesc"
-		       "doesn't match the one from EFI!\n");
+		printk(KERN_WARNING
+		  "Kernel-defined memdesc doesn't match the one from EFI!\n");
+
+	if (add_efi_memmap)
+		do_add_efi_memmap();
 
 	/* Setup for EFI runtime service */
 	reboot_type = BOOT_EFI;
@@ -379,31 +434,25 @@ void __init efi_init(void)
 #endif
 }
 
-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
 static void __init runtime_code_page_mkexec(void)
 {
 	efi_memory_desc_t *md;
-	unsigned long end;
 	void *p;
-
-	if (!(__supported_pte_mask & _PAGE_NX))
-		return;
+	u64 addr, npages;
 
 	/* Make EFI runtime service code area executable */
 	for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
 		md = p;
-		end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
-		if (md->type == EFI_RUNTIME_SERVICES_CODE &&
-		    (end >> PAGE_SHIFT) <= max_pfn_mapped) {
-			set_memory_x(md->virt_addr, md->num_pages);
-			set_memory_uc(md->virt_addr, md->num_pages);
-		}
+
+		if (md->type != EFI_RUNTIME_SERVICES_CODE)
+			continue;
+
+		addr = md->virt_addr;
+		npages = md->num_pages;
+		memrange_efi_to_native(&addr, &npages);
+		set_memory_x(addr, npages);
 	}
-	__flush_tlb_all();
 }
-#else
-static inline void __init runtime_code_page_mkexec(void) { }
-#endif
 
 /*
  * This function will switch the EFI runtime services to virtual mode.
@@ -417,30 +466,44 @@ void __init efi_enter_virtual_mode(void)
 {
 	efi_memory_desc_t *md;
 	efi_status_t status;
-	unsigned long end;
-	void *p;
+	unsigned long size;
+	u64 end, systab, addr, npages;
+	void *p, *va;
 
 	efi.systab = NULL;
 	for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
 		md = p;
 		if (!(md->attribute & EFI_MEMORY_RUNTIME))
 			continue;
-		end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
-		if ((md->attribute & EFI_MEMORY_WB) &&
-		    ((end >> PAGE_SHIFT) <= max_pfn_mapped))
-			md->virt_addr = (unsigned long)__va(md->phys_addr);
+
+		size = md->num_pages << EFI_PAGE_SHIFT;
+		end = md->phys_addr + size;
+
+		if (PFN_UP(end) <= max_low_pfn_mapped)
+			va = __va(md->phys_addr);
 		else
-			md->virt_addr = (unsigned long)
-				efi_ioremap(md->phys_addr,
-					    md->num_pages << EFI_PAGE_SHIFT);
-		if (!md->virt_addr)
+			va = efi_ioremap(md->phys_addr, size);
+
+		md->virt_addr = (u64) (unsigned long) va;
+
+		if (!va) {
 			printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n",
 			       (unsigned long long)md->phys_addr);
-		if ((md->phys_addr <= (unsigned long)efi_phys.systab) &&
-		    ((unsigned long)efi_phys.systab < end))
-			efi.systab = (efi_system_table_t *)(unsigned long)
-				(md->virt_addr - md->phys_addr +
-				 (unsigned long)efi_phys.systab);
+			continue;
+		}
+
+		if (!(md->attribute & EFI_MEMORY_WB)) {
+			addr = md->virt_addr;
+			npages = md->num_pages;
+			memrange_efi_to_native(&addr, &npages);
+			set_memory_uc(addr, npages);
+		}
+
+		systab = (u64) (unsigned long) efi_phys.systab;
+		if (md->phys_addr <= systab && systab < end) {
+			systab += md->virt_addr - md->phys_addr;
+			efi.systab = (efi_system_table_t *) (unsigned long) systab;
+		}
 	}
 
 	BUG_ON(!efi.systab);
@@ -473,7 +536,10 @@ void __init efi_enter_virtual_mode(void)
 	efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
 	efi.reset_system = virt_efi_reset_system;
 	efi.set_virtual_address_map = virt_efi_set_virtual_address_map;
-	runtime_code_page_mkexec();
+	if (__supported_pte_mask & _PAGE_NX)
+		runtime_code_page_mkexec();
+	early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
+	memmap.map = NULL;
 }
 
 /*