Changeset a218709 in mainline for kernel/arch/sparc32/include/arch/asm.h

Timestamp:

2013-12-02T23:45:45Z (10 years ago)

Author:

Jakub Klama <jakub.klama@…>

Branches:

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

Children:

2955bb9

Parents:

3bc42bd

Message:

Implement new userspace window trap mechanism, which utilizes MMU probe
to choose between slow (preemptive, involving inserting stack page mapping)
and fast (direct) handlers.

File:

• kernel/arch/sparc32/include/arch/asm.h (modified) (2 diffs)

kernel/arch/sparc32/include/arch/asm.h

@@ -145 +145 @@
 }
 
+NO_TRACE static inline uint32_t wim_read()
+{
+        uint32_t v;
+
+        asm volatile (
+                "mov %%wim, %[v]\n"
+                : [v] "=r" (v)
+        );
+
+        return v;
+}
+
 NO_TRACE static inline uint32_t asi_u32_read(int asi, uintptr_t va)
 {
@@ -178 +190 @@
 }
 
+NO_TRACE static inline void wim_write(uint32_t wim)
+{
+        asm volatile (
+                "mov %[v], %%wim\n"
+                :: [v] "r" (wim)
+        );
+}
+
 NO_TRACE static inline ipl_t interrupts_enable(void)
 {