Changeset d70ebffe in mainline for kernel/arch/sparc32/include/arch/stack.h

Timestamp:

2014-10-27T15:10:14Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

aef669b

Parents:

ec443d5

Message:

Let the fast MMU traps use exc_dispatch() in their slow-path.

In order to get proper exception accounting, the MMU related traps need
to go through the code in exc_dispatch(). To make this possible, we pass
the DTLB Tag Access register in istate_t in order to make way for the
trap type argument, which needs to be passed as the first argument to
exc_dispatch().

As a collateral change, this commit modifies the istate_t structure to
match the SPARC V9 ABI stack frame layout. It gives us a richer istate_t
with more information in it and also simplifies calculation of stack
offsets inside of preemptible_handler.

File:

• kernel/arch/sparc32/include/arch/stack.h (modified) (1 diff)

kernel/arch/sparc32/include/arch/stack.h

@@ -54 +54 @@
 #define STACK_ARG_SAVE_AREA_SIZE  (6 * STACK_ITEM_SIZE)
 
-/**
- * Offsets of arguments on stack.
- */
-#define STACK_ARG0  0
-#define STACK_ARG1  4
-#define STACK_ARG2  8
-#define STACK_ARG3  12
-#define STACK_ARG4  16
-#define STACK_ARG5  20
-#define STACK_ARG6  24
-
 #endif