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powerpc: Add definitions used by exception handling on 64-bit Book3E

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This adds various definitions and macros used by the exception and TLB
miss handling on 64-bit BookE

It also adds the definitions of the SPRGs used for various exception types

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2009-07-23 23:15:39 +00:00
parent 57e2a99f74
commit 13363ab9b9
2 changed files with 220 additions and 0 deletions
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19
arch/powerpc/include/asm/reg.h
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@ -652,6 +652,16 @@
* - SPRG2 scratch for exception vectors
* - SPRG3 unused (user visible)
*
* 64-bit embedded
* - SPRG0 generic exception scratch
* - SPRG2 TLB exception stack
* - SPRG3 unused (user visible)
* - SPRG4 unused (user visible)
* - SPRG6 TLB miss scratch (user visible, sorry !)
* - SPRG7 critical exception scratch
* - SPRG8 machine check exception scratch
* - SPRG9 debug exception scratch
*
* All 32-bit:
* - SPRG3 current thread_info pointer
* (virtual on BookE, physical on others)
@ -705,6 +715,15 @@
#define SPRN_SPRG_SCRATCH0 SPRN_SPRG2
#endif
#ifdef CONFIG_PPC_BOOK3E_64
#define SPRN_SPRG_MC_SCRATCH SPRN_SPRG8
#define SPRN_SPRG_CRIT_SCRATCH SPRN_SPRG7
#define SPRN_SPRG_DBG_SCRATCH SPRN_SPRG9
#define SPRN_SPRG_TLB_EXFRAME SPRN_SPRG2
#define SPRN_SPRG_TLB_SCRATCH SPRN_SPRG6
#define SPRN_SPRG_GEN_SCRATCH SPRN_SPRG0
#endif
#ifdef CONFIG_PPC_BOOK3S_32
#define SPRN_SPRG_SCRATCH0 SPRN_SPRG0
#define SPRN_SPRG_SCRATCH1 SPRN_SPRG1