aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm
diff options
context:
space:
mode:
authorKumar Gala <galak@kernel.crashing.org>2008-07-15 16:12:25 -0500
committerKumar Gala <galak@kernel.crashing.org>2008-09-24 16:29:40 -0500
commit0ba3418b8b1c85ee1771c63f1dd12041614e56ff (patch)
tree6f77bf668e76725710aae5126054eebd5913d319 /arch/powerpc/include/asm
parent1afb7f809bfb8fad9eec9419f3dfd75cee746ebd (diff)
powerpc: Introduce local (non-broadcast) forms of tlb invalidates
Introduced a new set of low level tlb invalidate functions that do not broadcast invalidates on the bus: _tlbil_all - invalidate all _tlbil_pid - invalidate based on process id (or mm context) _tlbil_va - invalidate based on virtual address (ea + pid) On non-SMP configs _tlbil_all should be functionally equivalent to _tlbia and _tlbil_va should be functionally equivalent to _tlbie. The intent of this change is to handle SMP based invalidates via IPIs instead of broadcasts as the mechanism scales better for larger number of cores. On e500 (fsl-booke mmu) based cores move to using MMUCSR for invalidate alls and tlbsx/tlbwe for invalidate virtual address. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm')
-rw-r--r--arch/powerpc/include/asm/reg_booke.h7
-rw-r--r--arch/powerpc/include/asm/tlbflush.h13
2 files changed, 15 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h
index be980f4ee49..67453766bff 100644
--- a/arch/powerpc/include/asm/reg_booke.h
+++ b/arch/powerpc/include/asm/reg_booke.h
@@ -109,6 +109,7 @@
#define SPRN_EVPR 0x3D6 /* Exception Vector Prefix Register */
#define SPRN_L1CSR0 0x3F2 /* L1 Cache Control and Status Register 0 */
#define SPRN_L1CSR1 0x3F3 /* L1 Cache Control and Status Register 1 */
+#define SPRN_MMUCSR0 0x3F4 /* MMU Control and Status Register 0 */
#define SPRN_PIT 0x3DB /* Programmable Interval Timer */
#define SPRN_BUCSR 0x3F5 /* Branch Unit Control and Status */
#define SPRN_L2CSR0 0x3F9 /* L2 Data Cache Control and Status Register 0 */
@@ -410,6 +411,12 @@
#define L2CSR0_L2LOA 0x00000080 /* L2 Cache Lock Overflow Allocate */
#define L2CSR0_L2LO 0x00000020 /* L2 Cache Lock Overflow */
+/* Bit definitions for MMUCSR0 */
+#define MMUCSR0_TLB1FI 0x00000002 /* TLB1 Flash invalidate */
+#define MMUCSR0_TLB0FI 0x00000004 /* TLB0 Flash invalidate */
+#define MMUCSR0_TLB2FI 0x00000040 /* TLB2 Flash invalidate */
+#define MMUCSR0_TLB3FI 0x00000020 /* TLB3 Flash invalidate */
+
/* Bit definitions for SGR. */
#define SGR_NORMAL 0 /* Speculative fetching allowed. */
#define SGR_GUARDED 1 /* Speculative fetching disallowed. */
diff --git a/arch/powerpc/include/asm/tlbflush.h b/arch/powerpc/include/asm/tlbflush.h
index 361cd5c7a32..a2c6bfd85fb 100644
--- a/arch/powerpc/include/asm/tlbflush.h
+++ b/arch/powerpc/include/asm/tlbflush.h
@@ -29,6 +29,9 @@
#include <linux/mm.h>
extern void _tlbie(unsigned long address, unsigned int pid);
+extern void _tlbil_all(void);
+extern void _tlbil_pid(unsigned int pid);
+extern void _tlbil_va(unsigned long address, unsigned int pid);
#if defined(CONFIG_40x) || defined(CONFIG_8xx)
#define _tlbia() asm volatile ("tlbia; sync" : : : "memory")
@@ -38,31 +41,31 @@ extern void _tlbia(void);
static inline void flush_tlb_mm(struct mm_struct *mm)
{
- _tlbia();
+ _tlbil_pid(mm->context.id);
}
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
- _tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
+ _tlbil_va(vmaddr, vma ? vma->vm_mm->context.id : 0);
}
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
unsigned long vmaddr)
{
- _tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
+ flush_tlb_page(vma, vmaddr);
}
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
- _tlbia();
+ _tlbil_pid(vma->vm_mm->context.id);
}
static inline void flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
- _tlbia();
+ _tlbil_pid(0);
}
#elif defined(CONFIG_PPC32)