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arm64: Simplify NR_FIX_BTMAPS calculation 

We choose NR_FIX_BTMAPS such that each slot (NR_FIX_BTMAPS * PAGE_SIZE)
can address 256K.

Use division to derive NR_FIX_BTMAPS rather than defining it for each
page size.

Signed-off-by:  Mark Rutland <mark.rutland@arm.com>
Signed-off-by:  Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Rutland 2015-10-19 14:19:33 +01:00 committed by Catalin Marinas
parent 755e70b7e3
commit e25781e3de
1 changed files with 2 additions and 5 deletions
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7
arch/arm64/include/asm/fixmap.h
View File

@ -17,6 +17,7 @@
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
#include <linux/sizes.h>
#include <asm/boot.h>
#include <asm/page.h>
@ -55,11 +56,7 @@ enum fixed_addresses {
* Temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*/
#ifdef CONFIG_ARM64_64K_PAGES
#define NR_FIX_BTMAPS 4
#else
#define NR_FIX_BTMAPS 64
#endif
#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE)
#define FIX_BTMAPS_SLOTS 7
#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)