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i386 boot: replace boot_ioremap with enhanced bt_ioremap - enhance bt_ioremap

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This patch makes it possible for bt_ioremap() to be used before
paging_init(), via providing an early implementation of set_fixmap()
that can be used before paging_init().

This way boot_ioremap() can be replaced by bt_ioremap().

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Huang, Ying
2008-01-30 13:33:44 +01:00
committed by Ingo Molnar
parent 4138cc3418
commit 0947b2f31c
4 changed files with 91 additions and 2 deletions
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3
include/asm-x86/io_32.h
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@@ -139,6 +139,9 @@ extern void iounmap(volatile void __iomem *addr);
* mappings, before the real ioremap() is functional.
* A boot-time mapping is currently limited to at most 16 pages.
*/
extern void bt_ioremap_init(void);
extern void bt_ioremap_clear(void);
extern void bt_ioremap_reset(void);
extern void *bt_ioremap(unsigned long offset, unsigned long size);
extern void bt_iounmap(void *addr, unsigned long size);
extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);