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path: root/arch/x86/kernel/head64.c
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2008-04-19x86_64: do not reserve ramdisk two timesYinghai Lu
ramdisk is reserved via reserve_early in x86_64_start_kernel, later early_res_to_bootmem() will convert to reservation in bootmem. so don't need to reserve that again. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17x86: don't set up early exception handlers for external interruptsAndi Kleen
All of early setup runs with interrupts disabled, so there is no need to set up early exception handlers for vectors >= 32 This saves some minor text size. Signed-off-by: Andi Kleen <ak@suse.de> Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17x86: reserve end-of-conventional-memory to 1MB, 64-bit, use paravirt_enabledAlexander van Heukelum
Jeremy Fitzhardinge pointed out that looking at the boot_params struct to determine if the system is running in a paravirtual environment is not reliable for the Xen case, currently. He also points out that there already exists a function to determine if the system is running in a paravirtual environment. So let's use that instead. This gets rid of the preprocessor test too. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17x86: reserve end-of-conventional-memory to 1MB, 64-bitAlexander van Heukelum
This patch is an add-on to the 64-bit ebda patch. It makes the functions reserve_ebda_region (renamed from reserve_ebda) and copy_e820_map equal to the 32-bit versions of the previous patch. Changes: Use u64 and u32 for local variables in copy_e820_map. The amount of conventional memory and the start of the EBDA are detected by reading the BIOS data area directly. Paravirtual environments do not provide this area, so we bail out early in that case. They will just have to set up a correct memory map to start with. Add a safety net for zeroed out BIOS data area. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17x86: reserve_early end-of-conventional-memory to 1MB, 64-bitAlexander van Heukelum
Explicitly reserve_early the whole address range from the end of conventional memory as reported by the bios data area up to the 1Mb mark. Regard the info retrieved from the BIOS data area with a bit of paranoia, though, because some biosses forget to register the EBDA correctly. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17x86: check vmlinux limits, 64-bitIngo Molnar
these build-time and link-time checks would have prevented the vmlinux size regression. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-18x86: zap invalid and unused pmds in early bootThomas Gleixner
The early boot code maps KERNEL_TEXT_SIZE (currently 40MB) starting from __START_KERNEL_map. The kernel itself only needs _text to _end mapped in the high alias. On relocatible kernels the ASM setup code adjusts the compile time created high mappings to the relocation. This creates invalid pmd entries for negative offsets: 0xffffffff80000000 -> pmd entry: ffffffffff2001e3 It points outside of the physical address space and is marked present. This starts at the virtual address __START_KERNEL_map and goes up to the point where the first valid physical address (0x0) is mapped. Zap the mappings before _text and after _end right away in early boot. This removes also the invalid entries. Furthermore it simplifies the range check for high aliases. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86_64: add debug name for early_resYinghai Lu
helps debugging problems in this rather murky area of code. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30x86: fix more non-global TLB flushesIngo Molnar
fix more __flush_tlb() instances, out of caution. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: replace hard coded reservations in 64-bit early boot code with dynamic ↵Andi Kleen
table On x86-64 there are several memory allocations before bootmem. To avoid them stomping on each other they used to be all hard coded in bad_area(). Replace this with an array that is filled as needed. This cleans up the code considerably and allows to expand its use. Cc: peterz@infradead.org Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: make early printk selectable on 64-bit as wellIngo Molnar
Enable CONFIG_EMBEDDED to select CONFIG_EARLY_PRINTK on 64-bit as well. saves ~2K: text data bss dec hex filename 7290283 3672091 1907848 12870222 c4624e vmlinux.before 7288373 3671795 1907848 12868016 c459b0 vmlinux.after Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: early_idt_handler improvements, 64-bitRoland McGrath
It's not too pretty, but I found this made the "PANIC: early exception" messages become much more reliably useful: 1. print the vector number, 2. print the %cs value, 3. handle error-code-pushing vs non-pushing vectors. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: do not set boot cpu in cpu_online_map at x86_64_start_kernel()Yinghai Lu
In init/main.c boot_cpu_init() does that later. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Cc: Zachary Amsden <zach@vmware.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: remove duplicate start_kernel declarationThomas Gleixner
start_kernel is already declared in a generic header file. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30x86: move debug related declarations to kdebug.hThomas Gleixner
Move them and fixup some users. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-19x86: use descriptor's functions instead of inline assemblyGlauber de Oliveira Costa
This patch provides a new set of functions for managing the descriptor tables that can be used instead of putting the raw assembly in .c files. Remodeling of store_tr() suggested by Frederik Deweerdt. [ tglx: arch/x86 adaptation ] Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-16[x86] remove uses of magic macros for boot_params accessH. Peter Anvin
Instead of using magic macros for boot_params access, simply use the boot_params structure. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2007-10-13Delete filenames in comments.Dave Jones
Since the x86 merge, lots of files that referenced their own filenames are no longer correct. Rather than keep them up to date, just delete them, as they add no real value. Additionally: - fix up comment formatting in scx200_32.c - Remove a credit from myself in setup_64.c from a time when we had no SCM - remove longwinded history from tsc_32.c which can be figured out from git. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-11x86_64: move kernelThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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