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ARM: 6225/1: make TCM allocation static and common for all archs

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This changes the TCM handling so that a fixed area is reserved at
0xfffe0000-0xfffeffff for TCM. This areas is used by XScale but
XScale does not have TCM so the mechanisms are mutually exclusive.

This change is needed to make TCM detection more dynamic while
still being able to compile code into it, and is a must for the
unified ARM goals: the current TCM allocation at different places
in memory for each machine would be a nightmare if you want to
compile a single image for more than one machine with TCM so it
has to be nailed down in one place.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Linus Walleij
2010-07-12 21:53:28 +01:00
committed by Russell King
parent 07d2a5c721
commit 1dbd30e989
6 changed files with 90 additions and 73 deletions
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9
arch/arm/include/asm/memory.h
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@ -123,6 +123,15 @@
#endif /* !CONFIG_MMU */
/*
* We fix the TCM memories max 32 KiB ITCM resp DTCM at these
* locations
*/
#ifdef CONFIG_HAVE_TCM
#define ITCM_OFFSET UL(0xfffe0000)
#define DTCM_OFFSET UL(0xfffe8000)
#endif
/*
* Physical vs virtual RAM address space conversion. These are
* private definitions which should NOT be used outside memory.h