x86, fixmap: prepare fixmap_32.h for unification
Impact: cleanup Just prepare fixmap for later mechanic unification. No real modification on code. text data bss dec hex filename 3831152 353188 372736 4557076 458914 vmlinux-32.after 3831152 353188 372736 4557076 458914 vmlinux-32.before Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br> Acked-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Gustavo F. Padovan
H. Peter Anvin
parent
e365bcd921
commit
c78f322ce8
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@ -8,50 +8,80 @@
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* Copyright (C) 1998 Ingo Molnar
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*
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* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
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* x86_32 and x86_64 integration by Gustavo F. Padovan, February 2009
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*/
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#ifndef _ASM_X86_FIXMAP_32_H
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#define _ASM_X86_FIXMAP_32_H
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/* used by vmalloc.c, vsyscall.lds.S.
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*
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* Leave one empty page between vmalloc'ed areas and
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* the start of the fixmap.
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*/
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extern unsigned long __FIXADDR_TOP;
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#define FIXADDR_USER_START __fix_to_virt(FIX_VDSO)
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#define FIXADDR_USER_END __fix_to_virt(FIX_VDSO - 1)
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#ifndef __ASSEMBLY__
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#include <linux/kernel.h>
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#include <asm/acpi.h>
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#include <asm/apicdef.h>
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#include <asm/page.h>
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#ifdef CONFIG_X86_32
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#include <linux/threads.h>
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#include <asm/kmap_types.h>
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#else
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#include <asm/vsyscall.h>
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#ifdef CONFIG_EFI
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#include <asm/efi.h>
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#endif
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#endif
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/*
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* We can't declare FIXADDR_TOP as variable for x86_64 because vsyscall
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* uses fixmaps that relies on FIXADDR_TOP for proper address calculation.
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* Because of this, FIXADDR_TOP x86 integration was left as later work.
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*/
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#ifdef CONFIG_X86_32
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/* used by vmalloc.c, vsyscall.lds.S.
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*
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* Leave one empty page between vmalloc'ed areas and
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* the start of the fixmap.
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*/
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extern unsigned long __FIXADDR_TOP;
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#define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP)
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#define FIXADDR_USER_START __fix_to_virt(FIX_VDSO)
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#define FIXADDR_USER_END __fix_to_virt(FIX_VDSO - 1)
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#else
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#define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE)
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/* Only covers 32bit vsyscalls currently. Need another set for 64bit. */
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#define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL)
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#define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE)
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#endif
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/*
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* Here we define all the compile-time 'special' virtual
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* addresses. The point is to have a constant address at
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* compile time, but to set the physical address only
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* in the boot process. We allocate these special addresses
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* in the boot process.
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* for x86_32: We allocate these special addresses
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* from the end of virtual memory (0xfffff000) backwards.
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* Also this lets us do fail-safe vmalloc(), we
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* can guarantee that these special addresses and
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* vmalloc()-ed addresses never overlap.
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*
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* these 'compile-time allocated' memory buffers are
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* fixed-size 4k pages. (or larger if used with an increment
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* highger than 1) use fixmap_set(idx,phys) to associate
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* These 'compile-time allocated' memory buffers are
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* fixed-size 4k pages (or larger if used with an increment
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* higher than 1). Use set_fixmap(idx,phys) to associate
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* physical memory with fixmap indices.
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*
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* TLB entries of such buffers will not be flushed across
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* task switches.
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*/
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enum fixed_addresses {
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#ifdef CONFIG_X86_32
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FIX_HOLE,
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FIX_VDSO,
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#else
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VSYSCALL_LAST_PAGE,
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VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE
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+ ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1,
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VSYSCALL_HPET,
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#endif
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FIX_DBGP_BASE,
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FIX_EARLYCON_MEM_BASE,
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#ifdef CONFIG_X86_LOCAL_APIC
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@ -59,7 +89,14 @@ enum fixed_addresses {
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#endif
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#ifdef CONFIG_X86_IO_APIC
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FIX_IO_APIC_BASE_0,
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FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
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FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1,
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#endif
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#ifdef CONFIG_X86_64
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#ifdef CONFIG_EFI
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FIX_EFI_IO_MAP_LAST_PAGE,
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FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE
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+ MAX_EFI_IO_PAGES - 1,
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#endif
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#endif
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#ifdef CONFIG_X86_VISWS_APIC
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FIX_CO_CPU, /* Cobalt timer */
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@ -73,15 +110,20 @@ enum fixed_addresses {
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#ifdef CONFIG_X86_CYCLONE_TIMER
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FIX_CYCLONE_TIMER, /*cyclone timer register*/
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#endif
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#ifdef CONFIG_X86_32
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FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
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FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
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#ifdef CONFIG_PCI_MMCONFIG
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FIX_PCIE_MCFG,
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#endif
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#endif
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#ifdef CONFIG_PARAVIRT
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FIX_PARAVIRT_BOOTMAP,
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#endif
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__end_of_permanent_fixed_addresses,
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#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
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FIX_OHCI1394_BASE,
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#endif
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/*
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* 256 temporary boot-time mappings, used by early_ioremap(),
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* before ioremap() is functional.
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@ -94,18 +136,15 @@ enum fixed_addresses {
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FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
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(__end_of_permanent_fixed_addresses & 255),
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FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
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#ifdef CONFIG_X86_32
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FIX_WP_TEST,
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#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
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FIX_OHCI1394_BASE,
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#endif
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__end_of_fixed_addresses
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};
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extern void reserve_top_address(unsigned long reserve);
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#define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP)
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#define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
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#define FIXADDR_BOOT_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
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#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
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