diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-07 15:39:38 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-09 13:33:51 +0100 |
| commit | 1c14fa4937eb73509e07ac12bf8db1fdf4c42a59 (patch) | |
| tree | d137f1587078f2909a2df48a5206ca1e9751f47f /arch/x86/kernel | |
| parent | d5b562330ec766292a3ac54ae5e0673610bd5b3d (diff) | |
x86: use early_ioremap in __acpi_map_table
__acpi_map_table() effectively reimplements early_ioremap(). Rather
than have that duplication, just implement it in terms of
early_ioremap().
However, unlike early_ioremap(), __acpi_map_table() just maintains a
single mapping which gets replaced each call, and has no corresponding
unmap function. Implement this by just removing the previous mapping
each time its called. Unfortunately, this will leave a stray mapping
at the end.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index d37593c2f43..c518599e426 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -121,8 +121,8 @@ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; */ char *__init __acpi_map_table(unsigned long phys, unsigned long size) { - unsigned long base, offset, mapped_size; - int idx; + static char *prev_map; + static unsigned long prev_size; if (!phys || !size) return NULL; @@ -130,26 +130,13 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size) if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT)) return __va(phys); - offset = phys & (PAGE_SIZE - 1); - mapped_size = PAGE_SIZE - offset; - clear_fixmap(FIX_ACPI_END); - set_fixmap(FIX_ACPI_END, phys); - base = fix_to_virt(FIX_ACPI_END); + if (prev_map) + early_iounmap(prev_map, prev_size); - /* - * Most cases can be covered by the below. - */ - idx = FIX_ACPI_END; - while (mapped_size < size) { - if (--idx < FIX_ACPI_BEGIN) - return NULL; /* cannot handle this */ - phys += PAGE_SIZE; - clear_fixmap(idx); - set_fixmap(idx, phys); - mapped_size += PAGE_SIZE; - } + prev_size = size; + prev_map = early_ioremap(phys, size); - return ((unsigned char *)base + offset); + return prev_map; } #ifdef CONFIG_PCI_MMCONFIG |