arch: Remove Itanium (IA-64) architecture

The Itanium architecture is obsolete, and an informal survey [0] reveals
that any residual use of Itanium hardware in production is mostly HP-UX
or OpenVMS based. The use of Linux on Itanium appears to be limited to
enthusiasts that occasionally boot a fresh Linux kernel to see whether
things are still working as intended, and perhaps to churn out some
distro packages that are rarely used in practice.

None of the original companies behind Itanium still produce or support
any hardware or software for the architecture, and it is listed as
'Orphaned' in the MAINTAINERS file, as apparently, none of the engineers
that contributed on behalf of those companies (nor anyone else, for that
matter) have been willing to support or maintain the architecture
upstream or even be responsible for applying the odd fix. The Intel
firmware team removed all IA-64 support from the Tianocore/EDK2
reference implementation of EFI in 2018. (Itanium is the original
architecture for which EFI was developed, and the way Linux supports it
deviates significantly from other architectures.) Some distros, such as
Debian and Gentoo, still maintain [unofficial] ia64 ports, but many have
dropped support years ago.

While the argument is being made [1] that there is a 'for the common
good' angle to being able to build and run existing projects such as the
Grid Community Toolkit [2] on Itanium for interoperability testing, the
fact remains that none of those projects are known to be deployed on
Linux/ia64, and very few people actually have access to such a system in
the first place. Even if there were ways imaginable in which Linux/ia64
could be put to good use today, what matters is whether anyone is
actually doing that, and this does not appear to be the case.

There are no emulators widely available, and so boot testing Itanium is
generally infeasible for ordinary contributors. GCC still supports IA-64
but its compile farm [3] no longer has any IA-64 machines. GLIBC would
like to get rid of IA-64 [4] too because it would permit some overdue
code cleanups. In summary, the benefits to the ecosystem of having IA-64
be part of it are mostly theoretical, whereas the maintenance overhead
of keeping it supported is real.

So let's rip off the band aid, and remove the IA-64 arch code entirely.
This follows the timeline proposed by the Debian/ia64 maintainer [5],
which removes support in a controlled manner, leaving IA-64 in a known
good state in the most recent LTS release. Other projects will follow
once the kernel support is removed.

[0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/
[1] https://lore.kernel.org/all/0075883c-7c51-00f5-2c2d-5119c1820410@web.de/
[2] https://gridcf.org/gct-docs/latest/index.html
[3] https://cfarm.tetaneutral.net/machines/list/
[4] https://lore.kernel.org/all/87bkiilpc4.fsf@mid.deneb.enyo.de/
[5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/

Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

1 files changed, 0 insertions, 1081 deletions

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
deleted file mode 100644
index 5a55ac82c13a..000000000000
--- a/arch/ia64/kernel/setup.c
+++ /dev/null
@@ -1,1081 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Architecture-specific setup.
- *
- * Copyright (C) 1998-2001, 2003-2004 Hewlett-Packard Co
- *	David Mosberger-Tang <davidm@hpl.hp.com>
- *	Stephane Eranian <eranian@hpl.hp.com>
- * Copyright (C) 2000, 2004 Intel Corp
- * 	Rohit Seth <rohit.seth@intel.com>
- * 	Suresh Siddha <suresh.b.siddha@intel.com>
- * 	Gordon Jin <gordon.jin@intel.com>
- * Copyright (C) 1999 VA Linux Systems
- * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
- *
- * 12/26/04 S.Siddha, G.Jin, R.Seth
- *			Add multi-threading and multi-core detection
- * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo().
- * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map
- * 03/31/00 R.Seth	cpu_initialized and current->processor fixes
- * 02/04/00 D.Mosberger	some more get_cpuinfo fixes...
- * 02/01/00 R.Seth	fixed get_cpuinfo for SMP
- * 01/07/99 S.Eranian	added the support for command line argument
- * 06/24/99 W.Drummond	added boot_cpu_data.
- * 05/28/05 Z. Menyhart	Dynamic stride size for "flush_icache_range()"
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/pgtable.h>
-
-#include <linux/acpi.h>
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/cpu.h>
-#include <linux/kdev_t.h>
-#include <linux/kernel.h>
-#include <linux/memblock.h>
-#include <linux/reboot.h>
-#include <linux/sched/mm.h>
-#include <linux/sched/clock.h>
-#include <linux/sched/task_stack.h>
-#include <linux/seq_file.h>
-#include <linux/string.h>
-#include <linux/threads.h>
-#include <linux/screen_info.h>
-#include <linux/dmi.h>
-#include <linux/root_dev.h>
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/efi.h>
-#include <linux/initrd.h>
-#include <linux/pm.h>
-#include <linux/cpufreq.h>
-#include <linux/kexec.h>
-#include <linux/crash_dump.h>
-
-#include <asm/mca.h>
-#include <asm/meminit.h>
-#include <asm/page.h>
-#include <asm/patch.h>
-#include <asm/processor.h>
-#include <asm/sal.h>
-#include <asm/sections.h>
-#include <asm/setup.h>
-#include <asm/smp.h>
-#include <asm/tlbflush.h>
-#include <asm/unistd.h>
-#include <asm/uv/uv.h>
-#include <asm/xtp.h>
-
-#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
-# error "struct cpuinfo_ia64 too big!"
-#endif
-
-char ia64_platform_name[64];
-
-#ifdef CONFIG_SMP
-unsigned long __per_cpu_offset[NR_CPUS];
-EXPORT_SYMBOL(__per_cpu_offset);
-#endif
-
-DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
-EXPORT_SYMBOL(ia64_cpu_info);
-DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
-#ifdef CONFIG_SMP
-EXPORT_SYMBOL(local_per_cpu_offset);
-#endif
-unsigned long ia64_cycles_per_usec;
-struct ia64_boot_param *ia64_boot_param;
-struct screen_info screen_info;
-unsigned long vga_console_iobase;
-unsigned long vga_console_membase;
-
-static struct resource data_resource = {
-	.name	= "Kernel data",
-	.flags	= IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
-};
-
-static struct resource code_resource = {
-	.name	= "Kernel code",
-	.flags	= IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
-};
-
-static struct resource bss_resource = {
-	.name	= "Kernel bss",
-	.flags	= IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
-};
-
-unsigned long ia64_max_cacheline_size;
-
-unsigned long ia64_iobase;	/* virtual address for I/O accesses */
-EXPORT_SYMBOL(ia64_iobase);
-struct io_space io_space[MAX_IO_SPACES];
-EXPORT_SYMBOL(io_space);
-unsigned int num_io_spaces;
-
-/*
- * "flush_icache_range()" needs to know what processor dependent stride size to use
- * when it makes i-cache(s) coherent with d-caches.
- */
-#define	I_CACHE_STRIDE_SHIFT	5	/* Safest way to go: 32 bytes by 32 bytes */
-unsigned long ia64_i_cache_stride_shift = ~0;
-/*
- * "clflush_cache_range()" needs to know what processor dependent stride size to
- * use when it flushes cache lines including both d-cache and i-cache.
- */
-/* Safest way to go: 32 bytes by 32 bytes */
-#define	CACHE_STRIDE_SHIFT	5
-unsigned long ia64_cache_stride_shift = ~0;
-
-/*
- * We use a special marker for the end of memory and it uses the extra (+1) slot
- */
-struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
-static int num_rsvd_regions __initdata;
-
-
-/*
- * Filter incoming memory segments based on the primitive map created from the boot
- * parameters. Segments contained in the map are removed from the memory ranges. A
- * caller-specified function is called with the memory ranges that remain after filtering.
- * This routine does not assume the incoming segments are sorted.
- */
-int __init
-filter_rsvd_memory (u64 start, u64 end, void *arg)
-{
-	u64 range_start, range_end, prev_start;
-	void (*func)(unsigned long, unsigned long, int);
-	int i;
-
-#if IGNORE_PFN0
-	if (start == PAGE_OFFSET) {
-		printk(KERN_WARNING "warning: skipping physical page 0\n");
-		start += PAGE_SIZE;
-		if (start >= end) return 0;
-	}
-#endif
-	/*
-	 * lowest possible address(walker uses virtual)
-	 */
-	prev_start = PAGE_OFFSET;
-	func = arg;
-
-	for (i = 0; i < num_rsvd_regions; ++i) {
-		range_start = max(start, prev_start);
-		range_end   = min(end, rsvd_region[i].start);
-
-		if (range_start < range_end)
-			call_pernode_memory(__pa(range_start), range_end - range_start, func);
-
-		/* nothing more available in this segment */
-		if (range_end == end) return 0;
-
-		prev_start = rsvd_region[i].end;
-	}
-	/* end of memory marker allows full processing inside loop body */
-	return 0;
-}
-
-/*
- * Similar to "filter_rsvd_memory()", but the reserved memory ranges
- * are not filtered out.
- */
-int __init
-filter_memory(u64 start, u64 end, void *arg)
-{
-	void (*func)(unsigned long, unsigned long, int);
-
-#if IGNORE_PFN0
-	if (start == PAGE_OFFSET) {
-		printk(KERN_WARNING "warning: skipping physical page 0\n");
-		start += PAGE_SIZE;
-		if (start >= end)
-			return 0;
-	}
-#endif
-	func = arg;
-	if (start < end)
-		call_pernode_memory(__pa(start), end - start, func);
-	return 0;
-}
-
-static void __init
-sort_regions (struct rsvd_region *rsvd_region, int max)
-{
-	int j;
-
-	/* simple bubble sorting */
-	while (max--) {
-		for (j = 0; j < max; ++j) {
-			if (rsvd_region[j].start > rsvd_region[j+1].start) {
-				swap(rsvd_region[j], rsvd_region[j + 1]);
-			}
-		}
-	}
-}
-
-/* merge overlaps */
-static int __init
-merge_regions (struct rsvd_region *rsvd_region, int max)
-{
-	int i;
-	for (i = 1; i < max; ++i) {
-		if (rsvd_region[i].start >= rsvd_region[i-1].end)
-			continue;
-		if (rsvd_region[i].end > rsvd_region[i-1].end)
-			rsvd_region[i-1].end = rsvd_region[i].end;
-		--max;
-		memmove(&rsvd_region[i], &rsvd_region[i+1],
-			(max - i) * sizeof(struct rsvd_region));
-	}
-	return max;
-}
-
-/*
- * Request address space for all standard resources
- */
-static int __init register_memory(void)
-{
-	code_resource.start = ia64_tpa(_text);
-	code_resource.end   = ia64_tpa(_etext) - 1;
-	data_resource.start = ia64_tpa(_etext);
-	data_resource.end   = ia64_tpa(_edata) - 1;
-	bss_resource.start  = ia64_tpa(__bss_start);
-	bss_resource.end    = ia64_tpa(_end) - 1;
-	efi_initialize_iomem_resources(&code_resource, &data_resource,
-			&bss_resource);
-
-	return 0;
-}
-
-__initcall(register_memory);
-
-
-#ifdef CONFIG_KEXEC
-
-/*
- * This function checks if the reserved crashkernel is allowed on the specific
- * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
- * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
- * kernel/dma/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
- * in kdump case. See the comment in sba_init() in sba_iommu.c.
- *
- * So, the only machvec that really supports loading the kdump kernel
- * over 4 GB is "uv".
- */
-static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
-{
-	if (is_uv_system())
-		return 1;
-	else
-		return pbase < (1UL << 32);
-}
-
-static void __init setup_crashkernel(unsigned long total, int *n)
-{
-	unsigned long long base = 0, size = 0;
-	int ret;
-
-	ret = parse_crashkernel(boot_command_line, total,
-			&size, &base);
-	if (ret == 0 && size > 0) {
-		if (!base) {
-			sort_regions(rsvd_region, *n);
-			*n = merge_regions(rsvd_region, *n);
-			base = kdump_find_rsvd_region(size,
-					rsvd_region, *n);
-		}
-
-		if (!check_crashkernel_memory(base, size)) {
-			pr_warn("crashkernel: There would be kdump memory "
-				"at %ld GB but this is unusable because it "
-				"must\nbe below 4 GB. Change the memory "
-				"configuration of the machine.\n",
-				(unsigned long)(base >> 30));
-			return;
-		}
-
-		if (base != ~0UL) {
-			printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
-					"for crashkernel (System RAM: %ldMB)\n",
-					(unsigned long)(size >> 20),
-					(unsigned long)(base >> 20),
-					(unsigned long)(total >> 20));
-			rsvd_region[*n].start =
-				(unsigned long)__va(base);
-			rsvd_region[*n].end =
-				(unsigned long)__va(base + size);
-			(*n)++;
-			crashk_res.start = base;
-			crashk_res.end = base + size - 1;
-		}
-	}
-	efi_memmap_res.start = ia64_boot_param->efi_memmap;
-	efi_memmap_res.end = efi_memmap_res.start +
-		ia64_boot_param->efi_memmap_size;
-	boot_param_res.start = __pa(ia64_boot_param);
-	boot_param_res.end = boot_param_res.start +
-		sizeof(*ia64_boot_param);
-}
-#else
-static inline void __init setup_crashkernel(unsigned long total, int *n)
-{}
-#endif
-
-#ifdef CONFIG_CRASH_DUMP
-static int __init reserve_elfcorehdr(u64 *start, u64 *end)
-{
-	u64 length;
-
-	/* We get the address using the kernel command line,
-	 * but the size is extracted from the EFI tables.
-	 * Both address and size are required for reservation
-	 * to work properly.
-	 */
-
-	if (!is_vmcore_usable())
-		return -EINVAL;
-
-	if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
-		vmcore_unusable();
-		return -EINVAL;
-	}
-
-	*start = (unsigned long)__va(elfcorehdr_addr);
-	*end = *start + length;
-	return 0;
-}
-#endif /* CONFIG_CRASH_DUMP */
-
-/**
- * reserve_memory - setup reserved memory areas
- *
- * Setup the reserved memory areas set aside for the boot parameters,
- * initrd, etc.  There are currently %IA64_MAX_RSVD_REGIONS defined,
- * see arch/ia64/include/asm/meminit.h if you need to define more.
- */
-void __init
-reserve_memory (void)
-{
-	int n = 0;
-	unsigned long total_memory;
-
-	/*
-	 * none of the entries in this table overlap
-	 */
-	rsvd_region[n].start = (unsigned long) ia64_boot_param;
-	rsvd_region[n].end   = rsvd_region[n].start + sizeof(*ia64_boot_param);
-	n++;
-
-	rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
-	rsvd_region[n].end   = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
-	n++;
-
-	rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
-	rsvd_region[n].end   = (rsvd_region[n].start
-				+ strlen(__va(ia64_boot_param->command_line)) + 1);
-	n++;
-
-	rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
-	rsvd_region[n].end   = (unsigned long) ia64_imva(_end);
-	n++;
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (ia64_boot_param->initrd_start) {
-		rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
-		rsvd_region[n].end   = rsvd_region[n].start + ia64_boot_param->initrd_size;
-		n++;
-	}
-#endif
-
-#ifdef CONFIG_CRASH_DUMP
-	if (reserve_elfcorehdr(&rsvd_region[n].start,
-			       &rsvd_region[n].end) == 0)
-		n++;
-#endif
-
-	total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
-	n++;
-
-	setup_crashkernel(total_memory, &n);
-
-	/* end of memory marker */
-	rsvd_region[n].start = ~0UL;
-	rsvd_region[n].end   = ~0UL;
-	n++;
-
-	num_rsvd_regions = n;
-	BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
-
-	sort_regions(rsvd_region, num_rsvd_regions);
-	num_rsvd_regions = merge_regions(rsvd_region, num_rsvd_regions);
-
-	/* reserve all regions except the end of memory marker with memblock */
-	for (n = 0; n < num_rsvd_regions - 1; n++) {
-		struct rsvd_region *region = &rsvd_region[n];
-		phys_addr_t addr = __pa(region->start);
-		phys_addr_t size = region->end - region->start;
-
-		memblock_reserve(addr, size);
-	}
-}
-
-/**
- * find_initrd - get initrd parameters from the boot parameter structure
- *
- * Grab the initrd start and end from the boot parameter struct given us by
- * the boot loader.
- */
-void __init
-find_initrd (void)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (ia64_boot_param->initrd_start) {
-		initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
-		initrd_end   = initrd_start+ia64_boot_param->initrd_size;
-
-		printk(KERN_INFO "Initial ramdisk at: 0x%lx (%llu bytes)\n",
-		       initrd_start, ia64_boot_param->initrd_size);
-	}
-#endif
-}
-
-static void __init
-io_port_init (void)
-{
-	unsigned long phys_iobase;
-
-	/*
-	 * Set `iobase' based on the EFI memory map or, failing that, the
-	 * value firmware left in ar.k0.
-	 *
-	 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
-	 * the port's virtual address, so ia32_load_state() loads it with a
-	 * user virtual address.  But in ia64 mode, glibc uses the
-	 * *physical* address in ar.k0 to mmap the appropriate area from
-	 * /dev/mem, and the inX()/outX() interfaces use MMIO.  In both
-	 * cases, user-mode can only use the legacy 0-64K I/O port space.
-	 *
-	 * ar.k0 is not involved in kernel I/O port accesses, which can use
-	 * any of the I/O port spaces and are done via MMIO using the
-	 * virtual mmio_base from the appropriate io_space[].
-	 */
-	phys_iobase = efi_get_iobase();
-	if (!phys_iobase) {
-		phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
-		printk(KERN_INFO "No I/O port range found in EFI memory map, "
-			"falling back to AR.KR0 (0x%lx)\n", phys_iobase);
-	}
-	ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
-	ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
-
-	/* setup legacy IO port space */
-	io_space[0].mmio_base = ia64_iobase;
-	io_space[0].sparse = 1;
-	num_io_spaces = 1;
-}
-
-/**
- * early_console_setup - setup debugging console
- *
- * Consoles started here require little enough setup that we can start using
- * them very early in the boot process, either right after the machine
- * vector initialization, or even before if the drivers can detect their hw.
- *
- * Returns non-zero if a console couldn't be setup.
- */
-static inline int __init
-early_console_setup (char *cmdline)
-{
-#ifdef CONFIG_EFI_PCDP
-	if (!efi_setup_pcdp_console(cmdline))
-		return 0;
-#endif
-	return -1;
-}
-
-static void __init
-screen_info_setup(void)
-{
-	unsigned int orig_x, orig_y, num_cols, num_rows, font_height;
-
-	memset(&screen_info, 0, sizeof(screen_info));
-
-	if (!ia64_boot_param->console_info.num_rows ||
-	    !ia64_boot_param->console_info.num_cols) {
-		printk(KERN_WARNING "invalid screen-info, guessing 80x25\n");
-		orig_x = 0;
-		orig_y = 0;
-		num_cols = 80;
-		num_rows = 25;
-		font_height = 16;
-	} else {
-		orig_x = ia64_boot_param->console_info.orig_x;
-		orig_y = ia64_boot_param->console_info.orig_y;
-		num_cols = ia64_boot_param->console_info.num_cols;
-		num_rows = ia64_boot_param->console_info.num_rows;
-		font_height = 400 / num_rows;
-	}
-
-	screen_info.orig_x = orig_x;
-	screen_info.orig_y = orig_y;
-	screen_info.orig_video_cols  = num_cols;
-	screen_info.orig_video_lines = num_rows;
-	screen_info.orig_video_points = font_height;
-	screen_info.orig_video_mode = 3;	/* XXX fake */
-	screen_info.orig_video_isVGA = 1;	/* XXX fake */
-	screen_info.orig_video_ega_bx = 3;	/* XXX fake */
-}
-
-static inline void
-mark_bsp_online (void)
-{
-#ifdef CONFIG_SMP
-	/* If we register an early console, allow CPU 0 to printk */
-	set_cpu_online(smp_processor_id(), true);
-#endif
-}
-
-static __initdata int nomca;
-static __init int setup_nomca(char *s)
-{
-	nomca = 1;
-	return 0;
-}
-early_param("nomca", setup_nomca);
-
-void __init
-setup_arch (char **cmdline_p)
-{
-	unw_init();
-
-	ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
-
-	*cmdline_p = __va(ia64_boot_param->command_line);
-	strscpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
-
-	efi_init();
-	io_port_init();
-
-	uv_probe_system_type();
-	parse_early_param();
-
-	if (early_console_setup(*cmdline_p) == 0)
-		mark_bsp_online();
-
-	/* Initialize the ACPI boot-time table parser */
-	acpi_table_init();
-	early_acpi_boot_init();
-#ifdef CONFIG_ACPI_NUMA
-	acpi_numa_init();
-	acpi_numa_fixup();
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
-	prefill_possible_map();
-#endif
-	per_cpu_scan_finalize((cpumask_empty(&early_cpu_possible_map) ?
-		32 : cpumask_weight(&early_cpu_possible_map)),
-		additional_cpus > 0 ? additional_cpus : 0);
-#endif /* CONFIG_ACPI_NUMA */
-
-#ifdef CONFIG_SMP
-	smp_build_cpu_map();
-#endif
-	find_memory();
-
-	/* process SAL system table: */
-	ia64_sal_init(__va(sal_systab_phys));
-
-#ifdef CONFIG_ITANIUM
-	ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
-#else
-	{
-		unsigned long num_phys_stacked;
-
-		if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
-			ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
-	}
-#endif
-
-#ifdef CONFIG_SMP
-	cpu_physical_id(0) = hard_smp_processor_id();
-#endif
-
-	cpu_init();	/* initialize the bootstrap CPU */
-	mmu_context_init();	/* initialize context_id bitmap */
-
-#ifdef CONFIG_VT
-	if (!conswitchp) {
-# if defined(CONFIG_VGA_CONSOLE)
-		/*
-		 * Non-legacy systems may route legacy VGA MMIO range to system
-		 * memory.  vga_con probes the MMIO hole, so memory looks like
-		 * a VGA device to it.  The EFI memory map can tell us if it's
-		 * memory so we can avoid this problem.
-		 */
-		if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
-			conswitchp = &vga_con;
-# endif
-	}
-#endif
-
-	/* enable IA-64 Machine Check Abort Handling unless disabled */
-	if (!nomca)
-		ia64_mca_init();
-
-	/*
-	 * Default to /dev/sda2.  This assumes that the EFI partition
-	 * is physical disk 1 partition 1 and the Linux root disk is
-	 * physical disk 1 partition 2.
-	 */
-	ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 2);
-
-	if (is_uv_system())
-		uv_setup(cmdline_p);
-#ifdef CONFIG_SMP
-	else
-		init_smp_config();
-#endif
-
-	screen_info_setup();
-	paging_init();
-
-	clear_sched_clock_stable();
-}
-
-/*
- * Display cpu info for all CPUs.
- */
-static int
-show_cpuinfo (struct seq_file *m, void *v)
-{
-#ifdef CONFIG_SMP
-#	define lpj	c->loops_per_jiffy
-#	define cpunum	c->cpu
-#else
-#	define lpj	loops_per_jiffy
-#	define cpunum	0
-#endif
-	static struct {
-		unsigned long mask;
-		const char *feature_name;
-	} feature_bits[] = {
-		{ 1UL << 0, "branchlong" },
-		{ 1UL << 1, "spontaneous deferral"},
-		{ 1UL << 2, "16-byte atomic ops" }
-	};
-	char features[128], *cp, *sep;
-	struct cpuinfo_ia64 *c = v;
-	unsigned long mask;
-	unsigned long proc_freq;
-	int i, size;
-
-	mask = c->features;
-
-	/* build the feature string: */
-	memcpy(features, "standard", 9);
-	cp = features;
-	size = sizeof(features);
-	sep = "";
-	for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
-		if (mask & feature_bits[i].mask) {
-			cp += snprintf(cp, size, "%s%s", sep,
-				       feature_bits[i].feature_name),
-			sep = ", ";
-			mask &= ~feature_bits[i].mask;
-			size = sizeof(features) - (cp - features);
-		}
-	}
-	if (mask && size > 1) {
-		/* print unknown features as a hex value */
-		snprintf(cp, size, "%s0x%lx", sep, mask);
-	}
-
-	proc_freq = cpufreq_quick_get(cpunum);
-	if (!proc_freq)
-		proc_freq = c->proc_freq / 1000;
-
-	seq_printf(m,
-		   "processor  : %d\n"
-		   "vendor     : %s\n"
-		   "arch       : IA-64\n"
-		   "family     : %u\n"
-		   "model      : %u\n"
-		   "model name : %s\n"
-		   "revision   : %u\n"
-		   "archrev    : %u\n"
-		   "features   : %s\n"
-		   "cpu number : %lu\n"
-		   "cpu regs   : %u\n"
-		   "cpu MHz    : %lu.%03lu\n"
-		   "itc MHz    : %lu.%06lu\n"
-		   "BogoMIPS   : %lu.%02lu\n",
-		   cpunum, c->vendor, c->family, c->model,
-		   c->model_name, c->revision, c->archrev,
-		   features, c->ppn, c->number,
-		   proc_freq / 1000, proc_freq % 1000,
-		   c->itc_freq / 1000000, c->itc_freq % 1000000,
-		   lpj*HZ/500000, (lpj*HZ/5000) % 100);
-#ifdef CONFIG_SMP
-	seq_printf(m, "siblings   : %u\n",
-		   cpumask_weight(&cpu_core_map[cpunum]));
-	if (c->socket_id != -1)
-		seq_printf(m, "physical id: %u\n", c->socket_id);
-	if (c->threads_per_core > 1 || c->cores_per_socket > 1)
-		seq_printf(m,
-			   "core id    : %u\n"
-			   "thread id  : %u\n",
-			   c->core_id, c->thread_id);
-#endif
-	seq_printf(m,"\n");
-
-	return 0;
-}
-
-static void *
-c_start (struct seq_file *m, loff_t *pos)
-{
-#ifdef CONFIG_SMP
-	while (*pos < nr_cpu_ids && !cpu_online(*pos))
-		++*pos;
-#endif
-	return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL;
-}
-
-static void *
-c_next (struct seq_file *m, void *v, loff_t *pos)
-{
-	++*pos;
-	return c_start(m, pos);
-}
-
-static void
-c_stop (struct seq_file *m, void *v)
-{
-}
-
-const struct seq_operations cpuinfo_op = {
-	.start =	c_start,
-	.next =		c_next,
-	.stop =		c_stop,
-	.show =		show_cpuinfo
-};
-
-#define MAX_BRANDS	8
-static char brandname[MAX_BRANDS][128];
-
-static char *
-get_model_name(__u8 family, __u8 model)
-{
-	static int overflow;
-	char brand[128];
-	int i;
-
-	memcpy(brand, "Unknown", 8);
-	if (ia64_pal_get_brand_info(brand)) {
-		if (family == 0x7)
-			memcpy(brand, "Merced", 7);
-		else if (family == 0x1f) switch (model) {
-			case 0: memcpy(brand, "McKinley", 9); break;
-			case 1: memcpy(brand, "Madison", 8); break;
-			case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
-		}
-	}
-	for (i = 0; i < MAX_BRANDS; i++)
-		if (strcmp(brandname[i], brand) == 0)
-			return brandname[i];
-	for (i = 0; i < MAX_BRANDS; i++)
-		if (brandname[i][0] == '\0')
-			return strcpy(brandname[i], brand);
-	if (overflow++ == 0)
-		printk(KERN_ERR
-		       "%s: Table overflow. Some processor model information will be missing\n",
-		       __func__);
-	return "Unknown";
-}
-
-static void
-identify_cpu (struct cpuinfo_ia64 *c)
-{
-	union {
-		unsigned long bits[5];
-		struct {
-			/* id 0 & 1: */
-			char vendor[16];
-
-			/* id 2 */
-			u64 ppn;		/* processor serial number */
-
-			/* id 3: */
-			unsigned number		:  8;
-			unsigned revision	:  8;
-			unsigned model		:  8;
-			unsigned family		:  8;
-			unsigned archrev	:  8;
-			unsigned reserved	: 24;
-
-			/* id 4: */
-			u64 features;
-		} field;
-	} cpuid;
-	pal_vm_info_1_u_t vm1;
-	pal_vm_info_2_u_t vm2;
-	pal_status_t status;
-	unsigned long impl_va_msb = 50, phys_addr_size = 44;	/* Itanium defaults */
-	int i;
-	for (i = 0; i < 5; ++i)
-		cpuid.bits[i] = ia64_get_cpuid(i);
-
-	memcpy(c->vendor, cpuid.field.vendor, 16);
-#ifdef CONFIG_SMP
-	c->cpu = smp_processor_id();
-
-	/* below default values will be overwritten  by identify_siblings() 
-	 * for Multi-Threading/Multi-Core capable CPUs
-	 */
-	c->threads_per_core = c->cores_per_socket = c->num_log = 1;
-	c->socket_id = -1;
-
-	identify_siblings(c);
-
-	if (c->threads_per_core > smp_num_siblings)
-		smp_num_siblings = c->threads_per_core;
-#endif
-	c->ppn = cpuid.field.ppn;
-	c->number = cpuid.field.number;
-	c->revision = cpuid.field.revision;
-	c->model = cpuid.field.model;
-	c->family = cpuid.field.family;
-	c->archrev = cpuid.field.archrev;
-	c->features = cpuid.field.features;
-	c->model_name = get_model_name(c->family, c->model);
-
-	status = ia64_pal_vm_summary(&vm1, &vm2);
-	if (status == PAL_STATUS_SUCCESS) {
-		impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
-		phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
-	}
-	c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
-	c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
-}
-
-/*
- * Do the following calculations:
- *
- * 1. the max. cache line size.
- * 2. the minimum of the i-cache stride sizes for "flush_icache_range()".
- * 3. the minimum of the cache stride sizes for "clflush_cache_range()".
- */
-static void
-get_cache_info(void)
-{
-	unsigned long line_size, max = 1;
-	unsigned long l, levels, unique_caches;
-	pal_cache_config_info_t cci;
-	long status;
-
-        status = ia64_pal_cache_summary(&levels, &unique_caches);
-        if (status != 0) {
-                printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
-                       __func__, status);
-                max = SMP_CACHE_BYTES;
-		/* Safest setup for "flush_icache_range()" */
-		ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
-		/* Safest setup for "clflush_cache_range()" */
-		ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
-		goto out;
-        }
-
-	for (l = 0; l < levels; ++l) {
-		/* cache_type (data_or_unified)=2 */
-		status = ia64_pal_cache_config_info(l, 2, &cci);
-		if (status != 0) {
-			printk(KERN_ERR "%s: ia64_pal_cache_config_info"
-				"(l=%lu, 2) failed (status=%ld)\n",
-				__func__, l, status);
-			max = SMP_CACHE_BYTES;
-			/* The safest setup for "flush_icache_range()" */
-			cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
-			/* The safest setup for "clflush_cache_range()" */
-			ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
-			cci.pcci_unified = 1;
-		} else {
-			if (cci.pcci_stride < ia64_cache_stride_shift)
-				ia64_cache_stride_shift = cci.pcci_stride;
-
-			line_size = 1 << cci.pcci_line_size;
-			if (line_size > max)
-				max = line_size;
-		}
-
-		if (!cci.pcci_unified) {
-			/* cache_type (instruction)=1*/
-			status = ia64_pal_cache_config_info(l, 1, &cci);
-			if (status != 0) {
-				printk(KERN_ERR "%s: ia64_pal_cache_config_info"
-					"(l=%lu, 1) failed (status=%ld)\n",
-					__func__, l, status);
-				/* The safest setup for flush_icache_range() */
-				cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
-			}
-		}
-		if (cci.pcci_stride < ia64_i_cache_stride_shift)
-			ia64_i_cache_stride_shift = cci.pcci_stride;
-	}
-  out:
-	if (max > ia64_max_cacheline_size)
-		ia64_max_cacheline_size = max;
-}
-
-/*
- * cpu_init() initializes state that is per-CPU.  This function acts
- * as a 'CPU state barrier', nothing should get across.
- */
-void
-cpu_init (void)
-{
-	extern void ia64_mmu_init(void *);
-	static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
-	unsigned long num_phys_stacked;
-	pal_vm_info_2_u_t vmi;
-	unsigned int max_ctx;
-	struct cpuinfo_ia64 *cpu_info;
-	void *cpu_data;
-
-	cpu_data = per_cpu_init();
-#ifdef CONFIG_SMP
-	/*
-	 * insert boot cpu into sibling and core mapes
-	 * (must be done after per_cpu area is setup)
-	 */
-	if (smp_processor_id() == 0) {
-		cpumask_set_cpu(0, &per_cpu(cpu_sibling_map, 0));
-		cpumask_set_cpu(0, &cpu_core_map[0]);
-	} else {
-		/*
-		 * Set ar.k3 so that assembly code in MCA handler can compute
-		 * physical addresses of per cpu variables with a simple:
-		 *   phys = ar.k3 + &per_cpu_var
-		 * and the alt-dtlb-miss handler can set per-cpu mapping into
-		 * the TLB when needed. head.S already did this for cpu0.
-		 */
-		ia64_set_kr(IA64_KR_PER_CPU_DATA,
-			    ia64_tpa(cpu_data) - (long) __per_cpu_start);
-	}
-#endif
-
-	get_cache_info();
-
-	/*
-	 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
-	 * ia64_mmu_init() yet.  And we can't call ia64_mmu_init() first because it
-	 * depends on the data returned by identify_cpu().  We break the dependency by
-	 * accessing cpu_data() through the canonical per-CPU address.
-	 */
-	cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
-	identify_cpu(cpu_info);
-
-#ifdef CONFIG_MCKINLEY
-	{
-#		define FEATURE_SET 16
-		struct ia64_pal_retval iprv;
-
-		if (cpu_info->family == 0x1f) {
-			PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
-			if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
-				PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
-				              (iprv.v1 | 0x80), FEATURE_SET, 0);
-		}
-	}
-#endif
-
-	/* Clear the stack memory reserved for pt_regs: */
-	memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
-
-	ia64_set_kr(IA64_KR_FPU_OWNER, 0);
-
-	/*
-	 * Initialize the page-table base register to a global
-	 * directory with all zeroes.  This ensure that we can handle
-	 * TLB-misses to user address-space even before we created the
-	 * first user address-space.  This may happen, e.g., due to
-	 * aggressive use of lfetch.fault.
-	 */
-	ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
-
-	/*
-	 * Initialize default control register to defer speculative faults except
-	 * for those arising from TLB misses, which are not deferred.  The
-	 * kernel MUST NOT depend on a particular setting of these bits (in other words,
-	 * the kernel must have recovery code for all speculative accesses).  Turn on
-	 * dcr.lc as per recommendation by the architecture team.  Most IA-32 apps
-	 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
-	 * be fine).
-	 */
-	ia64_setreg(_IA64_REG_CR_DCR,  (  IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
-					| IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
-	mmgrab(&init_mm);
-	current->active_mm = &init_mm;
-	BUG_ON(current->mm);
-
-	ia64_mmu_init(ia64_imva(cpu_data));
-	ia64_mca_cpu_init(ia64_imva(cpu_data));
-
-	/* Clear ITC to eliminate sched_clock() overflows in human time.  */
-	ia64_set_itc(0);
-
-	/* disable all local interrupt sources: */
-	ia64_set_itv(1 << 16);
-	ia64_set_lrr0(1 << 16);
-	ia64_set_lrr1(1 << 16);
-	ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
-	ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
-
-	/* clear TPR & XTP to enable all interrupt classes: */
-	ia64_setreg(_IA64_REG_CR_TPR, 0);
-
-	/* Clear any pending interrupts left by SAL/EFI */
-	while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
-		ia64_eoi();
-
-#ifdef CONFIG_SMP
-	normal_xtp();
-#endif
-
-	/* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
-	if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
-		max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
-		setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
-	} else {
-		printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
-		max_ctx = (1U << 15) - 1;	/* use architected minimum */
-	}
-	while (max_ctx < ia64_ctx.max_ctx) {
-		unsigned int old = ia64_ctx.max_ctx;
-		if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
-			break;
-	}
-
-	if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
-		printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
-		       "stacked regs\n");
-		num_phys_stacked = 96;
-	}
-	/* size of physical stacked register partition plus 8 bytes: */
-	if (num_phys_stacked > max_num_phys_stacked) {
-		ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
-		max_num_phys_stacked = num_phys_stacked;
-	}
-}
-
-void __init arch_cpu_finalize_init(void)
-{
-	ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
-			       (unsigned long) __end___mckinley_e9_bundles);
-}
-
-static int __init run_dmi_scan(void)
-{
-	dmi_setup();
-	return 0;
-}
-core_initcall(run_dmi_scan);