[x86] remove uses of magic macros for boot_params access

Instead of using magic macros for boot_params access, simply use the
boot_params structure.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

13 files changed, 119 insertions, 113 deletions

diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index e8756e5f6b2..89dbf970e05 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -39,6 +39,7 @@ setup-y		+= printf.o string.o tty.o video.o version.o voyager.o
 setup-y		+= video-vga.o
 setup-y		+= video-vesa.o
 setup-y		+= video-bios.o
+
 targets		+= $(setup-y)
 hostprogs-y	:= tools/build
 
diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c
index 0f4d5e209e9..e422b8159f6 100644
--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -24,7 +24,7 @@
 #include <asm/page.h>
 #include <asm/e820.h>
 #include <asm/proto.h>
-#include <asm/bootsetup.h>
+#include <asm/setup.h>
 #include <asm/sections.h>
 
 struct e820map e820;
@@ -68,10 +68,15 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size)
 
 	/* initrd */ 
 #ifdef CONFIG_BLK_DEV_INITRD
-	if (LOADER_TYPE && INITRD_START && last >= INITRD_START && 
-	    addr < INITRD_START+INITRD_SIZE) { 
-		*addrp = PAGE_ALIGN(INITRD_START + INITRD_SIZE);
-		return 1;
+	if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+		unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+		unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;
+		unsigned long ramdisk_end   = ramdisk_image+ramdisk_size;
+
+		if (last >= ramdisk_image && addr < ramdisk_end) {
+			*addrp = PAGE_ALIGN(ramdisk_end);
+			return 1;
+		}
 	} 
 #endif
 	/* kernel code */
@@ -594,8 +599,8 @@ void __init setup_memory_region(void)
 	 * Otherwise fake a memory map; one section from 0k->640k,
 	 * the next section from 1mb->appropriate_mem_k
 	 */
-	sanitize_e820_map(E820_MAP, &E820_MAP_NR);
-	if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0)
+	sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
+	if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0)
 		early_panic("Cannot find a valid memory map");
 	printk(KERN_INFO "BIOS-provided physical RAM map:\n");
 	e820_print_map("BIOS-e820");
diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index fd9aff3f389..b7d6c23f287 100644
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -6,15 +6,10 @@
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <asm/fcntl.h>
+#include <asm/setup.h>
 #include <xen/hvc-console.h>
 
 /* Simple VGA output */
-
-#ifdef __i386__
-#include <asm/setup.h>
-#else
-#include <asm/bootsetup.h>
-#endif
 #define VGABASE		(__ISA_IO_base + 0xb8000)
 
 static int max_ypos = 25, max_xpos = 80;
@@ -234,10 +229,10 @@ static int __init setup_early_printk(char *buf)
 		early_serial_init(buf);
 		early_console = &early_serial_console;
 	} else if (!strncmp(buf, "vga", 3)
-	           && SCREEN_INFO.orig_video_isVGA == 1) {
-		max_xpos = SCREEN_INFO.orig_video_cols;
-		max_ypos = SCREEN_INFO.orig_video_lines;
-		current_ypos = SCREEN_INFO.orig_y;
+	           && boot_params.screen_info.orig_video_isVGA == 1) {
+		max_xpos = boot_params.screen_info.orig_video_cols;
+		max_ypos = boot_params.screen_info.orig_video_lines;
+		current_ypos = boot_params.screen_info.orig_y;
 		early_console = &early_vga_console;
  	} else if (!strncmp(buf, "simnow", 6)) {
  		simnow_init(buf + 6);
diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index 2452c6fbe99..b42558c48e9 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -331,11 +331,13 @@ void __init efi_init(void)
 	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_phys.systab =
+		(efi_system_table_t *)boot_params.efi_info.efi_systab;
+	memmap.phys_map = (void *)boot_params.efi_info.efi_memmap;
+	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 = (efi_system_table_t *)
 		boot_ioremap((unsigned long) efi_phys.systab,
@@ -446,7 +448,8 @@ void __init efi_init(void)
 		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);
+	memmap.map = boot_ioremap(boot_params.efi_info.efi_memmap,
+				  boot_params.efi_info.efi_memmap_size);
 	if (memmap.map == NULL)
 		printk(KERN_ERR PFX "Could not map the EFI memory map!\n");
 
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 8561f626eda..a7eee0a4751 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -14,7 +14,6 @@
 #include <asm/processor.h>
 #include <asm/proto.h>
 #include <asm/smp.h>
-#include <asm/bootsetup.h>
 #include <asm/setup.h>
 #include <asm/desc.h>
 #include <asm/pgtable.h>
@@ -36,26 +35,15 @@ static void __init clear_bss(void)
 	       (unsigned long) __bss_stop - (unsigned long) __bss_start);
 }
 
-#define NEW_CL_POINTER		0x228	/* Relative to real mode data */
-#define OLD_CL_MAGIC_ADDR	0x20
-#define OLD_CL_MAGIC            0xA33F
-#define OLD_CL_OFFSET           0x22
-
 static void __init copy_bootdata(char *real_mode_data)
 {
-	unsigned long new_data;
 	char * command_line;
 
-	memcpy(x86_boot_params, real_mode_data, BOOT_PARAM_SIZE);
-	new_data = *(u32 *) (x86_boot_params + NEW_CL_POINTER);
-	if (!new_data) {
-		if (OLD_CL_MAGIC != *(u16 *)(real_mode_data + OLD_CL_MAGIC_ADDR)) {
-			return;
-		}
-		new_data = __pa(real_mode_data) + *(u16 *)(real_mode_data + OLD_CL_OFFSET);
+	memcpy(&boot_params, real_mode_data, sizeof boot_params);
+	if (boot_params.hdr.cmd_line_ptr) {
+		command_line = __va(boot_params.hdr.cmd_line_ptr);
+		memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	}
-	command_line = __va(new_data);
-	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 }
 
 void __init x86_64_start_kernel(char * real_mode_data)
diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c
index 1200aaac403..ba918823505 100644
--- a/arch/x86/kernel/setup64.c
+++ b/arch/x86/kernel/setup64.c
@@ -11,7 +11,6 @@
 #include <linux/bootmem.h>
 #include <linux/bitops.h>
 #include <linux/module.h>
-#include <asm/bootsetup.h>
 #include <asm/pda.h>
 #include <asm/pgtable.h>
 #include <asm/processor.h>
@@ -23,8 +22,9 @@
 #include <asm/percpu.h>
 #include <asm/proto.h>
 #include <asm/sections.h>
+#include <asm/setup.h>
 
-char x86_boot_params[BOOT_PARAM_SIZE] __initdata;
+struct boot_params __initdata boot_params;
 
 cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
 
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index c8e1bc38d42..b87a6fd5ba4 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -137,10 +137,11 @@ EXPORT_SYMBOL(edd);
  */
 static inline void copy_edd(void)
 {
-     memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
-     memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
-     edd.mbr_signature_nr = EDD_MBR_SIG_NR;
-     edd.edd_info_nr = EDD_NR;
+     memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
+	    sizeof(edd.mbr_signature));
+     memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
+     edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
+     edd.edd_info_nr = boot_params.eddbuf_entries;
 }
 #else
 static inline void copy_edd(void)
@@ -434,17 +435,20 @@ void __init setup_bootmem_allocator(void)
 #endif
 	numa_kva_reserve();
 #ifdef CONFIG_BLK_DEV_INITRD
-	if (LOADER_TYPE && INITRD_START) {
-		if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
-			reserve_bootmem(INITRD_START, INITRD_SIZE);
-			initrd_start = INITRD_START + PAGE_OFFSET;
-			initrd_end = initrd_start+INITRD_SIZE;
-		}
-		else {
+	if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+		unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+		unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;
+		unsigned long ramdisk_end   = ramdisk_image + ramdisk_size;
+		unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+
+		if (ramdisk_end <= end_of_lowmem) {
+			reserve_bootmem(ramdisk_image, ramdisk_size);
+			initrd_start = ramdisk_image + PAGE_OFFSET;
+			initrd_end = initrd_start+ramdisk_size;
+		} else {
 			printk(KERN_ERR "initrd extends beyond end of memory "
-			    "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
-			    INITRD_START + INITRD_SIZE,
-			    max_low_pfn << PAGE_SHIFT);
+			       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+			       ramdisk_end, end_of_lowmem);
 			initrd_start = 0;
 		}
 	}
@@ -512,28 +516,29 @@ void __init setup_arch(char **cmdline_p)
 	 * the system table is valid.  If not, then initialize normally.
 	 */
 #ifdef CONFIG_EFI
-	if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
+	if ((boot_params.hdr.type_of_loader == 0x50) &&
+	    boot_params.efi_info.efi_systab)
 		efi_enabled = 1;
 #endif
 
- 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
- 	screen_info = SCREEN_INFO;
-	edid_info = EDID_INFO;
-	apm_info.bios = APM_BIOS_INFO;
-	ist_info = IST_INFO;
-	saved_videomode = VIDEO_MODE;
-	if( SYS_DESC_TABLE.length != 0 ) {
-		set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
-		machine_id = SYS_DESC_TABLE.table[0];
-		machine_submodel_id = SYS_DESC_TABLE.table[1];
-		BIOS_revision = SYS_DESC_TABLE.table[2];
+	ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
+	screen_info = boot_params.screen_info;
+	edid_info = boot_params.edid_info;
+	apm_info.bios = boot_params.apm_bios_info;
+	ist_info = boot_params.ist_info;
+	saved_videomode = boot_params.hdr.vid_mode;
+	if( boot_params.sys_desc_table.length != 0 ) {
+		set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
+		machine_id = boot_params.sys_desc_table.table[0];
+		machine_submodel_id = boot_params.sys_desc_table.table[1];
+		BIOS_revision = boot_params.sys_desc_table.table[2];
 	}
-	bootloader_type = LOADER_TYPE;
+	bootloader_type = boot_params.hdr.type_of_loader;
 
 #ifdef CONFIG_BLK_DEV_RAM
-	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
-	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
-	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+	rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
+	rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
+	rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
 #endif
 	ARCH_SETUP
 	if (efi_enabled)
@@ -545,7 +550,7 @@ void __init setup_arch(char **cmdline_p)
 
 	copy_edd();
 
-	if (!MOUNT_ROOT_RDONLY)
+	if (!boot_params.hdr.root_flags)
 		root_mountflags &= ~MS_RDONLY;
 	init_mm.start_code = (unsigned long) _text;
 	init_mm.end_code = (unsigned long) _etext;
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 85b5b6310ac..8159bf0be17 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -52,7 +52,6 @@
 #include <asm/dma.h>
 #include <asm/mpspec.h>
 #include <asm/mmu_context.h>
-#include <asm/bootsetup.h>
 #include <asm/proto.h>
 #include <asm/setup.h>
 #include <asm/mach_apic.h>
@@ -180,10 +179,11 @@ EXPORT_SYMBOL(edd);
  */
 static inline void copy_edd(void)
 {
-     memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
-     memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
-     edd.mbr_signature_nr = EDD_MBR_SIG_NR;
-     edd.edd_info_nr = EDD_NR;
+     memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
+	    sizeof(edd.mbr_signature));
+     memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
+     edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
+     edd.edd_info_nr = boot_params.eddbuf_entries;
 }
 #else
 static inline void copy_edd(void)
@@ -220,21 +220,21 @@ void __init setup_arch(char **cmdline_p)
 {
 	printk(KERN_INFO "Command line: %s\n", boot_command_line);
 
- 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
- 	screen_info = SCREEN_INFO;
-	edid_info = EDID_INFO;
-	saved_video_mode = SAVED_VIDEO_MODE;
-	bootloader_type = LOADER_TYPE;
+	ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
+	screen_info = boot_params.screen_info;
+	edid_info = boot_params.edid_info;
+	saved_video_mode = boot_params.hdr.vid_mode;
+	bootloader_type = boot_params.hdr.type_of_loader;
 
 #ifdef CONFIG_BLK_DEV_RAM
-	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
-	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
-	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+	rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
+	rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
+	rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
 #endif
 	setup_memory_region();
 	copy_edd();
 
-	if (!MOUNT_ROOT_RDONLY)
+	if (!boot_params.hdr.root_flags)
 		root_mountflags &= ~MS_RDONLY;
 	init_mm.start_code = (unsigned long) &_text;
 	init_mm.end_code = (unsigned long) &_etext;
@@ -339,17 +339,20 @@ void __init setup_arch(char **cmdline_p)
 	 */
 	find_smp_config();
 #ifdef CONFIG_BLK_DEV_INITRD
-	if (LOADER_TYPE && INITRD_START) {
-		if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
-			reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
-			initrd_start = INITRD_START + PAGE_OFFSET;
-			initrd_end = initrd_start+INITRD_SIZE;
-		}
-		else {
+	if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+		unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+		unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;
+		unsigned long ramdisk_end   = ramdisk_image + ramdisk_size;
+		unsigned long end_of_mem    = end_pfn << PAGE_SHIFT;
+
+		if (ramdisk_end <= end_of_mem) {
+			reserve_bootmem_generic(ramdisk_image, ramdisk_size);
+			initrd_start = ramdisk_image + PAGE_OFFSET;
+			initrd_end = initrd_start+ramdisk_size;
+		} else {
 			printk(KERN_ERR "initrd extends beyond end of memory "
-			    "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
-			    (unsigned long)(INITRD_START + INITRD_SIZE),
-			    (unsigned long)(end_pfn << PAGE_SHIFT));
+			       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+			       ramdisk_end, end_of_mem);
 			initrd_start = 0;
 		}
 	}
diff --git a/arch/x86/mach-default/setup.c b/arch/x86/mach-default/setup.c
index 7f635c7a238..1bd82983986 100644
--- a/arch/x86/mach-default/setup.c
+++ b/arch/x86/mach-default/setup.c
@@ -159,16 +159,18 @@ char * __init machine_specific_memory_setup(void)
 	 * Otherwise fake a memory map; one section from 0k->640k,
 	 * the next section from 1mb->appropriate_mem_k
 	 */
-	sanitize_e820_map(E820_MAP, &E820_MAP_NR);
-	if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
+	sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
+	if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
+	    < 0) {
 		unsigned long mem_size;
 
 		/* compare results from other methods and take the greater */
-		if (ALT_MEM_K < EXT_MEM_K) {
-			mem_size = EXT_MEM_K;
+		if (boot_params.alt_mem_k
+		    < boot_params.screen_info.ext_mem_k) {
+			mem_size = boot_params.screen_info.ext_mem_k;
 			who = "BIOS-88";
 		} else {
-			mem_size = ALT_MEM_K;
+			mem_size = boot_params.alt_mem_k;
 			who = "BIOS-e801";
 		}
 
diff --git a/arch/x86/mach-visws/setup.c b/arch/x86/mach-visws/setup.c
index 1f81f10e03a..de4c9dbd086 100644
--- a/arch/x86/mach-visws/setup.c
+++ b/arch/x86/mach-visws/setup.c
@@ -152,7 +152,7 @@ char * __init machine_specific_memory_setup(void)
 {
 	long long gfx_mem_size = 8 * MB;
 
-	mem_size = ALT_MEM_K;
+	mem_size = boot_params.alt_mem_k;
 
 	if (!mem_size) {
 		printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
diff --git a/arch/x86/mach-voyager/setup.c b/arch/x86/mach-voyager/setup.c
index 2b55694e640..a0ab4002abc 100644
--- a/arch/x86/mach-voyager/setup.c
+++ b/arch/x86/mach-voyager/setup.c
@@ -83,7 +83,7 @@ char * __init machine_specific_memory_setup(void)
 
 		if(inb(catbase) != VOYAGER_DINO) {
 			printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
-			tom = (EXT_MEM_K)<<10;
+			tom = (boot_params.screen_info.ext_mem_k)<<10;
 		}
 		who = "Voyager-TOM";
 		add_memory_region(0, 0x9f000, E820_RAM);
@@ -104,16 +104,18 @@ char * __init machine_specific_memory_setup(void)
 	 * Otherwise fake a memory map; one section from 0k->640k,
 	 * the next section from 1mb->appropriate_mem_k
 	 */
-	sanitize_e820_map(E820_MAP, &E820_MAP_NR);
-	if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
+	sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
+	if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
+	    < 0) {
 		unsigned long mem_size;
 
 		/* compare results from other methods and take the greater */
-		if (ALT_MEM_K < EXT_MEM_K) {
-			mem_size = EXT_MEM_K;
+		if (boot_params.alt_mem_k
+		    < boot_params.screen_info.ext_mem_k) {
+			mem_size = boot_params.screen_info.ext_mem_k;
 			who = "BIOS-88";
 		} else {
-			mem_size = ALT_MEM_K;
+			mem_size = boot_params.alt_mem_k;
 			who = "BIOS-e801";
 		}
 
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/discontig_32.c
index 860e912a3fb..b1e45457d4e 100644
--- a/arch/x86/mm/discontig_32.c
+++ b/arch/x86/mm/discontig_32.c
@@ -288,8 +288,9 @@ unsigned long __init setup_memory(void)
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	/* Numa kva area is below the initrd */
-	if (LOADER_TYPE && INITRD_START)
-		kva_start_pfn = PFN_DOWN(INITRD_START)  - kva_pages;
+	if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image)
+		kva_start_pfn = PFN_DOWN(boot_params.hdr.ramdisk_image)
+			- kva_pages;
 #endif
 	kva_start_pfn -= kva_start_pfn & (PTRS_PER_PTE-1);
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index f01bfcd4bde..493a083f688 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1137,9 +1137,10 @@ asmlinkage void __init xen_start_kernel(void)
 	new_cpu_data.x86_capability[0] = cpuid_edx(1);
 
 	/* Poke various useful things into boot_params */
-	LOADER_TYPE = (9 << 4) | 0;
-	INITRD_START = xen_start_info->mod_start ? __pa(xen_start_info->mod_start) : 0;
-	INITRD_SIZE = xen_start_info->mod_len;
+	boot_params.hdr.type_of_loader = (9 << 4) | 0;
+	boot_params.hdr.ramdisk_image = xen_start_info->mod_start
+		? __pa(xen_start_info->mod_start) : 0;
+	boot_params.hdr.ramdisk_size = xen_start_info->mod_len;
 
 	/* Start the world */
 	start_kernel();