forked from Minki/linux
467cbd207a
Pull x86 old platform removal from Peter Anvin: "This patchset removes support for several completely obsolete platforms, where the maintainers either have completely vanished or acked the removal. For some of them it is questionable if there even exists functional specimens of the hardware" Geert Uytterhoeven apparently thought this was a April Fool's pull request ;) * 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, platforms: Remove NUMAQ x86, platforms: Remove SGI Visual Workstation x86, apic: Remove support for IBM Summit/EXA chipset x86, apic: Remove support for ia32-based Unisys ES7000
168 lines
4.7 KiB
C
168 lines
4.7 KiB
C
/*
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* fixmap.h: compile-time virtual memory allocation
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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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_H
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#define _ASM_X86_FIXMAP_H
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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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#include <asm/pvclock.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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#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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#else
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#define FIXADDR_TOP (VSYSCALL_END-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.
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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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* 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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#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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VVAR_PAGE,
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VSYSCALL_HPET,
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#ifdef CONFIG_PARAVIRT_CLOCK
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PVCLOCK_FIXMAP_BEGIN,
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PVCLOCK_FIXMAP_END = PVCLOCK_FIXMAP_BEGIN+PVCLOCK_VSYSCALL_NR_PAGES-1,
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#endif
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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_PROVIDE_OHCI1394_DMA_INIT
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FIX_OHCI1394_BASE,
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#endif
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#ifdef CONFIG_X86_LOCAL_APIC
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FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
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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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#endif
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FIX_RO_IDT, /* Virtual mapping for read-only IDT */
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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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FIX_TEXT_POKE1, /* reserve 2 pages for text_poke() */
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FIX_TEXT_POKE0, /* first page is last, because allocation is backward */
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#ifdef CONFIG_X86_INTEL_MID
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FIX_LNW_VRTC,
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#endif
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__end_of_permanent_fixed_addresses,
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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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*
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* If necessary we round it up to the next 256 pages boundary so
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* that we can have a single pgd entry and a single pte table:
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*/
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#define NR_FIX_BTMAPS 64
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#define FIX_BTMAPS_SLOTS 4
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#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
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FIX_BTMAP_END =
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(__end_of_permanent_fixed_addresses ^
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(__end_of_permanent_fixed_addresses + TOTAL_FIX_BTMAPS - 1)) &
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-PTRS_PER_PTE
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? __end_of_permanent_fixed_addresses + TOTAL_FIX_BTMAPS -
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(__end_of_permanent_fixed_addresses & (TOTAL_FIX_BTMAPS - 1))
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: __end_of_permanent_fixed_addresses,
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FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
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#ifdef CONFIG_X86_32
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FIX_WP_TEST,
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#endif
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#ifdef CONFIG_INTEL_TXT
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FIX_TBOOT_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_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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#define FIXADDR_BOOT_START (FIXADDR_TOP - FIXADDR_BOOT_SIZE)
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extern int fixmaps_set;
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extern pte_t *kmap_pte;
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extern pgprot_t kmap_prot;
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extern pte_t *pkmap_page_table;
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void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
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void native_set_fixmap(enum fixed_addresses idx,
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phys_addr_t phys, pgprot_t flags);
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#ifndef CONFIG_PARAVIRT
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static inline void __set_fixmap(enum fixed_addresses idx,
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phys_addr_t phys, pgprot_t flags)
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{
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native_set_fixmap(idx, phys, flags);
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}
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#endif
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#include <asm-generic/fixmap.h>
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_FIXMAP_H */
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