[PATCH] x86_64: eliminate empty_bad_{page,{pte,pmd}_table}
... as they are no longer needed. Since there were hard-coded numbers in the file, the patch also adds a mechanism to avoid these (otherwise potential future changes would again and again require adjusting these numbers). Signed-Off-By: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Beulich
Linus Torvalds
parent
0addb142af
commit
f0cf5d1a34
1 changed files with 37 additions and 71 deletions
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@ -241,104 +241,70 @@ ljumpvector:
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ENTRY(stext)
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ENTRY(_stext)
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.org 0x1000
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ENTRY(init_level4_pgt)
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$page = 0
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#define NEXT_PAGE(name) \
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$page = $page + 1; \
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.org $page * 0x1000; \
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phys_/**/name = $page * 0x1000 + __PHYSICAL_START; \
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ENTRY(name)
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NEXT_PAGE(init_level4_pgt)
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/* This gets initialized in x86_64_start_kernel */
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.fill 512,8,0
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.org 0x2000
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ENTRY(level3_ident_pgt)
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.quad 0x0000000000004007 + __PHYSICAL_START
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NEXT_PAGE(level3_ident_pgt)
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.quad phys_level2_ident_pgt | 0x007
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.fill 511,8,0
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.org 0x3000
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ENTRY(level3_kernel_pgt)
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NEXT_PAGE(level3_kernel_pgt)
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.fill 510,8,0
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/* (2^48-(2*1024*1024*1024)-((2^39)*511))/(2^30) = 510 */
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.quad 0x0000000000005007 + __PHYSICAL_START /* -> level2_kernel_pgt */
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.quad phys_level2_kernel_pgt | 0x007
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.fill 1,8,0
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.org 0x4000
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ENTRY(level2_ident_pgt)
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NEXT_PAGE(level2_ident_pgt)
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/* 40MB for bootup. */
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.quad 0x0000000000000083
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.quad 0x0000000000200083
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.quad 0x0000000000400083
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.quad 0x0000000000600083
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.quad 0x0000000000800083
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.quad 0x0000000000A00083
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.quad 0x0000000000C00083
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.quad 0x0000000000E00083
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.quad 0x0000000001000083
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.quad 0x0000000001200083
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.quad 0x0000000001400083
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.quad 0x0000000001600083
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.quad 0x0000000001800083
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.quad 0x0000000001A00083
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.quad 0x0000000001C00083
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.quad 0x0000000001E00083
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.quad 0x0000000002000083
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.quad 0x0000000002200083
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.quad 0x0000000002400083
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.quad 0x0000000002600083
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i = 0
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.rept 20
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.quad i << 21 | 0x083
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i = i + 1
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.endr
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/* Temporary mappings for the super early allocator in arch/x86_64/mm/init.c */
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.globl temp_boot_pmds
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temp_boot_pmds:
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.fill 492,8,0
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.org 0x5000
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ENTRY(level2_kernel_pgt)
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NEXT_PAGE(level2_kernel_pgt)
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/* 40MB kernel mapping. The kernel code cannot be bigger than that.
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When you change this change KERNEL_TEXT_SIZE in page.h too. */
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/* (2^48-(2*1024*1024*1024)-((2^39)*511)-((2^30)*510)) = 0 */
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.quad 0x0000000000000183
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.quad 0x0000000000200183
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.quad 0x0000000000400183
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.quad 0x0000000000600183
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.quad 0x0000000000800183
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.quad 0x0000000000A00183
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.quad 0x0000000000C00183
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.quad 0x0000000000E00183
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.quad 0x0000000001000183
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.quad 0x0000000001200183
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.quad 0x0000000001400183
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.quad 0x0000000001600183
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.quad 0x0000000001800183
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.quad 0x0000000001A00183
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.quad 0x0000000001C00183
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.quad 0x0000000001E00183
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.quad 0x0000000002000183
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.quad 0x0000000002200183
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.quad 0x0000000002400183
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.quad 0x0000000002600183
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i = 0
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.rept 20
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.quad i << 21 | 0x183
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i = i + 1
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.endr
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/* Module mapping starts here */
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.fill 492,8,0
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.org 0x6000
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ENTRY(empty_zero_page)
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NEXT_PAGE(empty_zero_page)
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.org 0x7000
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ENTRY(empty_bad_page)
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NEXT_PAGE(level3_physmem_pgt)
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.quad phys_level2_kernel_pgt | 0x007 /* so that __va works even before pagetable_init */
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.fill 511,8,0
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.org 0x8000
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ENTRY(empty_bad_pte_table)
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#undef NEXT_PAGE
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.org 0x9000
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ENTRY(empty_bad_pmd_table)
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.data
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.org 0xa000
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ENTRY(level3_physmem_pgt)
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.quad 0x0000000000005007 + __PHYSICAL_START /* -> level2_kernel_pgt (so that __va works even before pagetable_init) */
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.org 0xb000
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#ifdef CONFIG_ACPI_SLEEP
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.align PAGE_SIZE
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ENTRY(wakeup_level4_pgt)
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.quad 0x0000000000002007 + __PHYSICAL_START /* -> level3_ident_pgt */
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.quad phys_level3_ident_pgt | 0x007
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.fill 255,8,0
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.quad 0x000000000000a007 + __PHYSICAL_START
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.quad phys_level3_physmem_pgt | 0x007
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.fill 254,8,0
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/* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
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.quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */
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.quad phys_level3_kernel_pgt | 0x007
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#endif
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#ifndef CONFIG_HOTPLUG_CPU
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@ -352,12 +318,12 @@ ENTRY(wakeup_level4_pgt)
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*/
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.align PAGE_SIZE
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ENTRY(boot_level4_pgt)
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.quad 0x0000000000002007 + __PHYSICAL_START /* -> level3_ident_pgt */
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.quad phys_level3_ident_pgt | 0x007
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.fill 255,8,0
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.quad 0x000000000000a007 + __PHYSICAL_START
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.quad phys_level3_physmem_pgt | 0x007
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.fill 254,8,0
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/* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
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.quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */
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.quad phys_level3_kernel_pgt | 0x007
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.data
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