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* x86: fix early-BUG messageVegard Nossum2008-04-301-9/+10
| | | | | | | | | | | | The .asciz directive takes any number of strings, but each one is zero- terminated, and string pasting is not done as in C. That results in only the first line being output. Replace .asciz with multiple .ascii directives and terminate with .asciz. Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: remove pointless commentsWANG Cong2008-04-191-1/+0
| | | | | | | | | Remove old comments that include the old arch/i386 directory. Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: introduce kernel/head32.cEric W. Biederman2008-04-171-1/+1
| | | | | | | | | | | | Copy x86_64 and add a head32.c so we can start moving early architecture initialization out of assembly. [ Sam Ravnborg <sam@ravnborg.org>: updated it to x86 ] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fix fault_msg nul terminationJiri Slaby2008-03-211-1/+1
| | | | | | | | | | The fault_msg text is not explictly nul terminated now in startup assembly. Do so by converting .ascii to .asciz. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: don't make swapper_pg_pmd globalAdrian Bunk2008-02-261-1/+1
| | | | | | | There doesn't seem to be any reason for swapper_pg_pmd being global. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: don't make swapper_pg_fixmap globalAdrian Bunk2008-02-191-1/+1
| | | | | | | | Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Ian Campbell <ijc@hellion.org.uk> Cc: hpa@zytor.com Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: construct 32-bit boot time page tables in native format.Ian Campbell2008-02-091-35/+116
| | | | | | | | | | | | | | | | | | | | | | | | Specifically the boot time page tables in a CONFIG_X86_PAE=y enabled kernel are in PAE format. early_ioremap is updated to use the standard page table accessors. Clear any mappings beyond max_low_pfn from the boot page tables in native_pagetable_setup_start because the initial mappings can extend beyond the range of physical memory and into the vmalloc area. Derived from patches by Eric Biederman and H. Peter Anvin. [ jeremy@goop.org: PAE swapper_pg_dir needs to be page-sized fix ] Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Mika Penttilä <mika.penttila@kolumbus.fi> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: fix Section mismatch: reference to .init.text:lguest_entrySam Ravnborg2008-01-301-1/+4
| | | | | | | | | fix: > WARNING: vmlinux.o(.data+0x4): Section mismatch: reference to .init.text:lguest_entry (between 'subarch_entries' and 'stack_start') Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86_32: always run the full set of paging state.Ian Campbell2008-01-301-2/+2
| | | | | | | | | | | | | | | | I am preparing to convert the boot time page table to the kernels native format. To achieve that I need to enable PAE. Enabling PSE and the no execute bit would not hurt. So this patch modifies the boot cpu path to execute all of the kernels enable code if and only if we have the proper bits set in mmu_cr4_features. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Mika Penttilä <mika.penttila@kolumbus.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86_32: remove unnecessary use of %ebx as the boot cpu flagIan Campbell2008-01-301-6/+1
| | | | | | | | | | | | | | | | | | | Currently in head_32.S there are two ways we test to see if we are the boot cpu. By looking at %ebx and by looking at the static variable ready. When changing things around I have found that it gets tricky to preserve %ebx. So this patch just switches head.S over to the more reliable test of always using ready. Hopefully later we can kill these tests entirely. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Mika Penttilä <mika.penttila@kolumbus.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: early fault debugging improvementIngo Molnar2008-01-301-0/+1
| | | | | Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* fix lguest rmmod "bad pgd"Rusty Russell2008-01-011-1/+1
| | | | | | | | | | | | | | | | After 17d57a9206b4de6ad082ac9f2d2346985abbd2aa ("x86: fix x86-32 early fixmap initialization.") removing lg.ko caused a printk from vunmap: mm/memory.c:115: bad pgd 004b3027. On the second use after module load, the kernel crashes. This fixes the immediate problem (accessed and dirty bits not set as expected in pmd_none_or_clear_bad). I can't see why this would cause a crash, but I haven't been able to reproduce it once this is applied. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86: fix x86-32 early fixmap initialization.Eric W. Biederman2007-12-031-6/+6
| | | | | | | | | | | | | | | | | | | | pageexec@freemail.hu writes: > i've just noticed that the chunk in i386/kernel/head.S ended up in a > weird place, namely, it's not going to be executed as it's just after > a 'jmp 3f' and before startup_32_smp, probably not what you intended. > on a sidenote, the whole thing can be done in a single insn, like: > > movl $(swapper_pg_pmd - __PAGE_OFFSET + 0x067), (swapper_pg_dir - > __PAGE_OFFSET+ 4092) Thanks for the reminder I thought we had fixed this problem a while ago. Needed to get fixed virtual address for USB debug and earlycon with mmio. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up setup.h and the boot codeH. Peter Anvin2007-10-231-6/+1
| | | | | | | | | | | | | Make <asm/setup.h> usable by the boot code. Clean up vestiges of the old command-line protocol from setup.h and head_32.S (it is still supported from the boot loader point of view, since it is converted to the new command-line protocol by the boot code.) Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* i386: paravirt boot sequenceRusty Russell2007-10-221-3/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch uses the updated boot protocol to do paravirtualized boot. If the boot version is >= 2.07, then it will do two things: 1. Check the bootparams loadflags to see if we should reload the segment registers and clear interrupts. This is appropriate for normal native boot and some paravirtualized environments, but inapproprate for others. 2. Check the hardware architecture, and dispatch to the appropriate kernel entrypoint. If the bootloader doesn't set this, then we simply do the normal boot sequence. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Zachary Amsden <zach@vmware.com> Cc: Andi Kleen <ak@suse.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i386: print better early fault infoIngo Molnar2007-10-171-2/+10
| | | | | | | | | | | | | | | | | | | | | | improve early fault output. old format: Int 14: CR2 010001e3 err 00000002 EIP c011f2f9 CS 00000060 flags 00010046 Stack: c073695e c0791c10 00000000 ffffffff 00000000 01000000 00001000 c0791c10 new format: BUG: Int 14: CR2 010001e3 EDI c1000000 ESI c0693c10 EBP c0637f9c ESP c0637f08 EBX 00000000 EDX 0000000e ECX 00000000 EAX 010001e3 err 00000002 EIP c0123119 CS 00000060 flg 00010046 Stack: c064d589 c0693000 00000000 c0637f60 00c001e3 01000000 00038000 00000163 00000000 00000163 00000000 ffffffff 00038000 00000000 00000000 00001000 00001000 00000000 c0637f88 c06509be c0a2ae60 00001000 00001000 00000000 Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: prepare page allocator for high allocations on PAGEALLOC=yIngo Molnar2007-10-171-0/+9
| | | | | | | | | To preserve the DMA pool in CONFIG_DEBUG_PAGEALLOC=y kernels, we'll allocate pagetables from above the 16MB DMA limit, so we'll have to set up boot pagetables to cover 16MB more RAM (worst-case). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* i386: move kernelThomas Gleixner2007-10-111-0/+578
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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