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-rw-r--r--arch/ppc/kernel/head_8xx.S12
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/ppc/kernel/head_8xx.S b/arch/ppc/kernel/head_8xx.S
index 5a7a64e91fc..eb18cadb375 100644
--- a/arch/ppc/kernel/head_8xx.S
+++ b/arch/ppc/kernel/head_8xx.S
@@ -288,13 +288,11 @@ SystemCall:
288 * For the MPC8xx, this is a software tablewalk to load the instruction 288 * For the MPC8xx, this is a software tablewalk to load the instruction
289 * TLB. It is modelled after the example in the Motorola manual. The task 289 * TLB. It is modelled after the example in the Motorola manual. The task
290 * switch loads the M_TWB register with the pointer to the first level table. 290 * switch loads the M_TWB register with the pointer to the first level table.
291 * If we discover there is no second level table (the value is zero), the 291 * If we discover there is no second level table (value is zero) or if there
292 * plan was to load that into the TLB, which causes another fault into the 292 * is an invalid pte, we load that into the TLB, which causes another fault
293 * TLB Error interrupt where we can handle such problems. However, that did 293 * into the TLB Error interrupt where we can handle such problems.
294 * not work, so if we discover there is no second level table, we restore 294 * We have to use the MD_xxx registers for the tablewalk because the
295 * registers and branch to the error exception. We have to use the MD_xxx 295 * equivalent MI_xxx registers only perform the attribute functions.
296 * registers for the tablewalk because the equivalent MI_xxx registers
297 * only perform the attribute functions.
298 */ 296 */
299InstructionTLBMiss: 297InstructionTLBMiss:
300#ifdef CONFIG_8xx_CPU6 298#ifdef CONFIG_8xx_CPU6