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-rw-r--r--arch/tile/kernel/regs_32.S145
1 files changed, 0 insertions, 145 deletions
diff --git a/arch/tile/kernel/regs_32.S b/arch/tile/kernel/regs_32.S
deleted file mode 100644
index 542cae17a93a..000000000000
--- a/arch/tile/kernel/regs_32.S
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- */
-
-#include <linux/linkage.h>
-#include <asm/ptrace.h>
-#include <asm/asm-offsets.h>
-#include <arch/spr_def.h>
-#include <asm/processor.h>
-#include <asm/switch_to.h>
-
-/*
- * See <asm/switch_to.h>; called with prev and next task_struct pointers.
- * "prev" is returned in r0 for _switch_to and also for ret_from_fork.
- *
- * We want to save pc/sp in "prev", and get the new pc/sp from "next".
- * We also need to save all the callee-saved registers on the stack.
- *
- * Intel enables/disables access to the hardware cycle counter in
- * seccomp (secure computing) environments if necessary, based on
- * has_secure_computing(). We might want to do this at some point,
- * though it would require virtualizing the other SPRs under WORLD_ACCESS.
- *
- * Since we're saving to the stack, we omit sp from this list.
- * And for parallels with other architectures, we save lr separately,
- * in the thread_struct itself (as the "pc" field).
- *
- * This code also needs to be aligned with process.c copy_thread()
- */
-
-#if CALLEE_SAVED_REGS_COUNT != 24
-# error Mismatch between <asm/switch_to.h> and kernel/entry.S
-#endif
-#define FRAME_SIZE ((2 + CALLEE_SAVED_REGS_COUNT) * 4)
-
-#define SAVE_REG(r) { sw r12, r; addi r12, r12, 4 }
-#define LOAD_REG(r) { lw r, r12; addi r12, r12, 4 }
-#define FOR_EACH_CALLEE_SAVED_REG(f) \
- f(r30); f(r31); \
- f(r32); f(r33); f(r34); f(r35); f(r36); f(r37); f(r38); f(r39); \
- f(r40); f(r41); f(r42); f(r43); f(r44); f(r45); f(r46); f(r47); \
- f(r48); f(r49); f(r50); f(r51); f(r52);
-
-STD_ENTRY_SECTION(__switch_to, .sched.text)
- {
- move r10, sp
- sw sp, lr
- addi sp, sp, -FRAME_SIZE
- }
- {
- addi r11, sp, 4
- addi r12, sp, 8
- }
- {
- sw r11, r10
- addli r4, r1, TASK_STRUCT_THREAD_KSP_OFFSET
- }
- {
- lw r13, r4 /* Load new sp to a temp register early. */
- addli r3, r0, TASK_STRUCT_THREAD_KSP_OFFSET
- }
- FOR_EACH_CALLEE_SAVED_REG(SAVE_REG)
- {
- sw r3, sp
- addli r3, r0, TASK_STRUCT_THREAD_PC_OFFSET
- }
- {
- sw r3, lr
- addli r4, r1, TASK_STRUCT_THREAD_PC_OFFSET
- }
- {
- lw lr, r4
- addi r12, r13, 8
- }
- {
- /* Update sp and ksp0 simultaneously to avoid backtracer warnings. */
- move sp, r13
- mtspr SPR_SYSTEM_SAVE_K_0, r2
- }
- FOR_EACH_CALLEE_SAVED_REG(LOAD_REG)
-.L__switch_to_pc:
- {
- addi sp, sp, FRAME_SIZE
- jrp lr /* r0 is still valid here, so return it */
- }
- STD_ENDPROC(__switch_to)
-
-/* Return a suitable address for the backtracer for suspended threads */
-STD_ENTRY_SECTION(get_switch_to_pc, .sched.text)
- lnk r0
- {
- addli r0, r0, .L__switch_to_pc - .
- jrp lr
- }
- STD_ENDPROC(get_switch_to_pc)
-
-STD_ENTRY(get_pt_regs)
- .irp reg, r0, r1, r2, r3, r4, r5, r6, r7, \
- r8, r9, r10, r11, r12, r13, r14, r15, \
- r16, r17, r18, r19, r20, r21, r22, r23, \
- r24, r25, r26, r27, r28, r29, r30, r31, \
- r32, r33, r34, r35, r36, r37, r38, r39, \
- r40, r41, r42, r43, r44, r45, r46, r47, \
- r48, r49, r50, r51, r52, tp, sp
- {
- sw r0, \reg
- addi r0, r0, 4
- }
- .endr
- {
- sw r0, lr
- addi r0, r0, PTREGS_OFFSET_PC - PTREGS_OFFSET_LR
- }
- lnk r1
- {
- sw r0, r1
- addi r0, r0, PTREGS_OFFSET_EX1 - PTREGS_OFFSET_PC
- }
- mfspr r1, INTERRUPT_CRITICAL_SECTION
- shli r1, r1, SPR_EX_CONTEXT_1_1__ICS_SHIFT
- ori r1, r1, KERNEL_PL
- {
- sw r0, r1
- addi r0, r0, PTREGS_OFFSET_FAULTNUM - PTREGS_OFFSET_EX1
- }
- {
- sw r0, zero /* clear faultnum */
- addi r0, r0, PTREGS_OFFSET_ORIG_R0 - PTREGS_OFFSET_FAULTNUM
- }
- {
- sw r0, zero /* clear orig_r0 */
- addli r0, r0, -PTREGS_OFFSET_ORIG_R0 /* restore r0 to base */
- }
- jrp lr
- STD_ENDPROC(get_pt_regs)