503 строки
13 KiB
ArmAsm
503 строки
13 KiB
ArmAsm
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994, 1995, 1996, 1998, 1999, 2002, 2003 Ralf Baechle
|
|
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
|
|
* Copyright (C) 1994, 1995, 1996, by Andreas Busse
|
|
* Copyright (C) 1999 Silicon Graphics, Inc.
|
|
* Copyright (C) 2000 MIPS Technologies, Inc.
|
|
* written by Carsten Langgaard, carstenl@mips.com
|
|
*/
|
|
#include <asm/asm.h>
|
|
#include <asm/cachectl.h>
|
|
#include <asm/fpregdef.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable-bits.h>
|
|
#include <asm/regdef.h>
|
|
#include <asm/stackframe.h>
|
|
#include <asm/thread_info.h>
|
|
|
|
#include <asm/asmmacro.h>
|
|
|
|
/*
|
|
* Offset to the current process status flags, the first 32 bytes of the
|
|
* stack are not used.
|
|
*/
|
|
#define ST_OFF (_THREAD_SIZE - 32 - PT_SIZE + PT_STATUS)
|
|
|
|
/*
|
|
* task_struct *resume(task_struct *prev, task_struct *next,
|
|
* struct thread_info *next_ti)
|
|
*/
|
|
.align 7
|
|
LEAF(resume)
|
|
.set arch=octeon
|
|
mfc0 t1, CP0_STATUS
|
|
LONG_S t1, THREAD_STATUS(a0)
|
|
cpu_save_nonscratch a0
|
|
LONG_S ra, THREAD_REG31(a0)
|
|
|
|
/* check if we need to save COP2 registers */
|
|
PTR_L t2, TASK_THREAD_INFO(a0)
|
|
LONG_L t0, ST_OFF(t2)
|
|
bbit0 t0, 30, 1f
|
|
|
|
/* Disable COP2 in the stored process state */
|
|
li t1, ST0_CU2
|
|
xor t0, t1
|
|
LONG_S t0, ST_OFF(t2)
|
|
|
|
/* Enable COP2 so we can save it */
|
|
mfc0 t0, CP0_STATUS
|
|
or t0, t1
|
|
mtc0 t0, CP0_STATUS
|
|
|
|
/* Save COP2 */
|
|
daddu a0, THREAD_CP2
|
|
jal octeon_cop2_save
|
|
dsubu a0, THREAD_CP2
|
|
|
|
/* Disable COP2 now that we are done */
|
|
mfc0 t0, CP0_STATUS
|
|
li t1, ST0_CU2
|
|
xor t0, t1
|
|
mtc0 t0, CP0_STATUS
|
|
|
|
1:
|
|
#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
|
|
/* Check if we need to store CVMSEG state */
|
|
mfc0 t0, $11,7 /* CvmMemCtl */
|
|
bbit0 t0, 6, 3f /* Is user access enabled? */
|
|
|
|
/* Store the CVMSEG state */
|
|
/* Extract the size of CVMSEG */
|
|
andi t0, 0x3f
|
|
/* Multiply * (cache line size/sizeof(long)/2) */
|
|
sll t0, 7-LONGLOG-1
|
|
li t1, -32768 /* Base address of CVMSEG */
|
|
LONG_ADDI t2, a0, THREAD_CVMSEG /* Where to store CVMSEG to */
|
|
synciobdma
|
|
2:
|
|
.set noreorder
|
|
LONG_L t8, 0(t1) /* Load from CVMSEG */
|
|
subu t0, 1 /* Decrement loop var */
|
|
LONG_L t9, LONGSIZE(t1)/* Load from CVMSEG */
|
|
LONG_ADDU t1, LONGSIZE*2 /* Increment loc in CVMSEG */
|
|
LONG_S t8, 0(t2) /* Store CVMSEG to thread storage */
|
|
LONG_ADDU t2, LONGSIZE*2 /* Increment loc in thread storage */
|
|
bnez t0, 2b /* Loop until we've copied it all */
|
|
LONG_S t9, -LONGSIZE(t2)/* Store CVMSEG to thread storage */
|
|
.set reorder
|
|
|
|
/* Disable access to CVMSEG */
|
|
mfc0 t0, $11,7 /* CvmMemCtl */
|
|
xori t0, t0, 0x40 /* Bit 6 is CVMSEG user enable */
|
|
mtc0 t0, $11,7 /* CvmMemCtl */
|
|
#endif
|
|
3:
|
|
/*
|
|
* The order of restoring the registers takes care of the race
|
|
* updating $28, $29 and kernelsp without disabling ints.
|
|
*/
|
|
move $28, a2
|
|
cpu_restore_nonscratch a1
|
|
|
|
#if (_THREAD_SIZE - 32) < 0x8000
|
|
PTR_ADDIU t0, $28, _THREAD_SIZE - 32
|
|
#else
|
|
PTR_LI t0, _THREAD_SIZE - 32
|
|
PTR_ADDU t0, $28
|
|
#endif
|
|
set_saved_sp t0, t1, t2
|
|
|
|
mfc0 t1, CP0_STATUS /* Do we really need this? */
|
|
li a3, 0xff01
|
|
and t1, a3
|
|
LONG_L a2, THREAD_STATUS(a1)
|
|
nor a3, $0, a3
|
|
and a2, a3
|
|
or a2, t1
|
|
mtc0 a2, CP0_STATUS
|
|
move v0, a0
|
|
jr ra
|
|
END(resume)
|
|
|
|
/*
|
|
* void octeon_cop2_save(struct octeon_cop2_state *a0)
|
|
*/
|
|
.align 7
|
|
LEAF(octeon_cop2_save)
|
|
|
|
dmfc0 t9, $9,7 /* CvmCtl register. */
|
|
|
|
/* Save the COP2 CRC state */
|
|
dmfc2 t0, 0x0201
|
|
dmfc2 t1, 0x0202
|
|
dmfc2 t2, 0x0200
|
|
sd t0, OCTEON_CP2_CRC_IV(a0)
|
|
sd t1, OCTEON_CP2_CRC_LENGTH(a0)
|
|
sd t2, OCTEON_CP2_CRC_POLY(a0)
|
|
/* Skip next instructions if CvmCtl[NODFA_CP2] set */
|
|
bbit1 t9, 28, 1f
|
|
|
|
/* Save the LLM state */
|
|
dmfc2 t0, 0x0402
|
|
dmfc2 t1, 0x040A
|
|
sd t0, OCTEON_CP2_LLM_DAT(a0)
|
|
sd t1, OCTEON_CP2_LLM_DAT+8(a0)
|
|
|
|
1: bbit1 t9, 26, 3f /* done if CvmCtl[NOCRYPTO] set */
|
|
|
|
/* Save the COP2 crypto state */
|
|
/* this part is mostly common to both pass 1 and later revisions */
|
|
dmfc2 t0, 0x0084
|
|
dmfc2 t1, 0x0080
|
|
dmfc2 t2, 0x0081
|
|
dmfc2 t3, 0x0082
|
|
sd t0, OCTEON_CP2_3DES_IV(a0)
|
|
dmfc2 t0, 0x0088
|
|
sd t1, OCTEON_CP2_3DES_KEY(a0)
|
|
dmfc2 t1, 0x0111 /* only necessary for pass 1 */
|
|
sd t2, OCTEON_CP2_3DES_KEY+8(a0)
|
|
dmfc2 t2, 0x0102
|
|
sd t3, OCTEON_CP2_3DES_KEY+16(a0)
|
|
dmfc2 t3, 0x0103
|
|
sd t0, OCTEON_CP2_3DES_RESULT(a0)
|
|
dmfc2 t0, 0x0104
|
|
sd t1, OCTEON_CP2_AES_INP0(a0) /* only necessary for pass 1 */
|
|
dmfc2 t1, 0x0105
|
|
sd t2, OCTEON_CP2_AES_IV(a0)
|
|
dmfc2 t2, 0x0106
|
|
sd t3, OCTEON_CP2_AES_IV+8(a0)
|
|
dmfc2 t3, 0x0107
|
|
sd t0, OCTEON_CP2_AES_KEY(a0)
|
|
dmfc2 t0, 0x0110
|
|
sd t1, OCTEON_CP2_AES_KEY+8(a0)
|
|
dmfc2 t1, 0x0100
|
|
sd t2, OCTEON_CP2_AES_KEY+16(a0)
|
|
dmfc2 t2, 0x0101
|
|
sd t3, OCTEON_CP2_AES_KEY+24(a0)
|
|
mfc0 t3, $15,0 /* Get the processor ID register */
|
|
sd t0, OCTEON_CP2_AES_KEYLEN(a0)
|
|
li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
|
|
sd t1, OCTEON_CP2_AES_RESULT(a0)
|
|
sd t2, OCTEON_CP2_AES_RESULT+8(a0)
|
|
/* Skip to the Pass1 version of the remainder of the COP2 state */
|
|
beq t3, t0, 2f
|
|
|
|
/* the non-pass1 state when !CvmCtl[NOCRYPTO] */
|
|
dmfc2 t1, 0x0240
|
|
dmfc2 t2, 0x0241
|
|
dmfc2 t3, 0x0242
|
|
dmfc2 t0, 0x0243
|
|
sd t1, OCTEON_CP2_HSH_DATW(a0)
|
|
dmfc2 t1, 0x0244
|
|
sd t2, OCTEON_CP2_HSH_DATW+8(a0)
|
|
dmfc2 t2, 0x0245
|
|
sd t3, OCTEON_CP2_HSH_DATW+16(a0)
|
|
dmfc2 t3, 0x0246
|
|
sd t0, OCTEON_CP2_HSH_DATW+24(a0)
|
|
dmfc2 t0, 0x0247
|
|
sd t1, OCTEON_CP2_HSH_DATW+32(a0)
|
|
dmfc2 t1, 0x0248
|
|
sd t2, OCTEON_CP2_HSH_DATW+40(a0)
|
|
dmfc2 t2, 0x0249
|
|
sd t3, OCTEON_CP2_HSH_DATW+48(a0)
|
|
dmfc2 t3, 0x024A
|
|
sd t0, OCTEON_CP2_HSH_DATW+56(a0)
|
|
dmfc2 t0, 0x024B
|
|
sd t1, OCTEON_CP2_HSH_DATW+64(a0)
|
|
dmfc2 t1, 0x024C
|
|
sd t2, OCTEON_CP2_HSH_DATW+72(a0)
|
|
dmfc2 t2, 0x024D
|
|
sd t3, OCTEON_CP2_HSH_DATW+80(a0)
|
|
dmfc2 t3, 0x024E
|
|
sd t0, OCTEON_CP2_HSH_DATW+88(a0)
|
|
dmfc2 t0, 0x0250
|
|
sd t1, OCTEON_CP2_HSH_DATW+96(a0)
|
|
dmfc2 t1, 0x0251
|
|
sd t2, OCTEON_CP2_HSH_DATW+104(a0)
|
|
dmfc2 t2, 0x0252
|
|
sd t3, OCTEON_CP2_HSH_DATW+112(a0)
|
|
dmfc2 t3, 0x0253
|
|
sd t0, OCTEON_CP2_HSH_IVW(a0)
|
|
dmfc2 t0, 0x0254
|
|
sd t1, OCTEON_CP2_HSH_IVW+8(a0)
|
|
dmfc2 t1, 0x0255
|
|
sd t2, OCTEON_CP2_HSH_IVW+16(a0)
|
|
dmfc2 t2, 0x0256
|
|
sd t3, OCTEON_CP2_HSH_IVW+24(a0)
|
|
dmfc2 t3, 0x0257
|
|
sd t0, OCTEON_CP2_HSH_IVW+32(a0)
|
|
dmfc2 t0, 0x0258
|
|
sd t1, OCTEON_CP2_HSH_IVW+40(a0)
|
|
dmfc2 t1, 0x0259
|
|
sd t2, OCTEON_CP2_HSH_IVW+48(a0)
|
|
dmfc2 t2, 0x025E
|
|
sd t3, OCTEON_CP2_HSH_IVW+56(a0)
|
|
dmfc2 t3, 0x025A
|
|
sd t0, OCTEON_CP2_GFM_MULT(a0)
|
|
dmfc2 t0, 0x025B
|
|
sd t1, OCTEON_CP2_GFM_MULT+8(a0)
|
|
sd t2, OCTEON_CP2_GFM_POLY(a0)
|
|
sd t3, OCTEON_CP2_GFM_RESULT(a0)
|
|
sd t0, OCTEON_CP2_GFM_RESULT+8(a0)
|
|
jr ra
|
|
|
|
2: /* pass 1 special stuff when !CvmCtl[NOCRYPTO] */
|
|
dmfc2 t3, 0x0040
|
|
dmfc2 t0, 0x0041
|
|
dmfc2 t1, 0x0042
|
|
dmfc2 t2, 0x0043
|
|
sd t3, OCTEON_CP2_HSH_DATW(a0)
|
|
dmfc2 t3, 0x0044
|
|
sd t0, OCTEON_CP2_HSH_DATW+8(a0)
|
|
dmfc2 t0, 0x0045
|
|
sd t1, OCTEON_CP2_HSH_DATW+16(a0)
|
|
dmfc2 t1, 0x0046
|
|
sd t2, OCTEON_CP2_HSH_DATW+24(a0)
|
|
dmfc2 t2, 0x0048
|
|
sd t3, OCTEON_CP2_HSH_DATW+32(a0)
|
|
dmfc2 t3, 0x0049
|
|
sd t0, OCTEON_CP2_HSH_DATW+40(a0)
|
|
dmfc2 t0, 0x004A
|
|
sd t1, OCTEON_CP2_HSH_DATW+48(a0)
|
|
sd t2, OCTEON_CP2_HSH_IVW(a0)
|
|
sd t3, OCTEON_CP2_HSH_IVW+8(a0)
|
|
sd t0, OCTEON_CP2_HSH_IVW+16(a0)
|
|
|
|
3: /* pass 1 or CvmCtl[NOCRYPTO] set */
|
|
jr ra
|
|
END(octeon_cop2_save)
|
|
|
|
/*
|
|
* void octeon_cop2_restore(struct octeon_cop2_state *a0)
|
|
*/
|
|
.align 7
|
|
.set push
|
|
.set noreorder
|
|
LEAF(octeon_cop2_restore)
|
|
/* First cache line was prefetched before the call */
|
|
pref 4, 128(a0)
|
|
dmfc0 t9, $9,7 /* CvmCtl register. */
|
|
|
|
pref 4, 256(a0)
|
|
ld t0, OCTEON_CP2_CRC_IV(a0)
|
|
pref 4, 384(a0)
|
|
ld t1, OCTEON_CP2_CRC_LENGTH(a0)
|
|
ld t2, OCTEON_CP2_CRC_POLY(a0)
|
|
|
|
/* Restore the COP2 CRC state */
|
|
dmtc2 t0, 0x0201
|
|
dmtc2 t1, 0x1202
|
|
bbit1 t9, 28, 2f /* Skip LLM if CvmCtl[NODFA_CP2] is set */
|
|
dmtc2 t2, 0x4200
|
|
|
|
/* Restore the LLM state */
|
|
ld t0, OCTEON_CP2_LLM_DAT(a0)
|
|
ld t1, OCTEON_CP2_LLM_DAT+8(a0)
|
|
dmtc2 t0, 0x0402
|
|
dmtc2 t1, 0x040A
|
|
|
|
2:
|
|
bbit1 t9, 26, done_restore /* done if CvmCtl[NOCRYPTO] set */
|
|
nop
|
|
|
|
/* Restore the COP2 crypto state common to pass 1 and pass 2 */
|
|
ld t0, OCTEON_CP2_3DES_IV(a0)
|
|
ld t1, OCTEON_CP2_3DES_KEY(a0)
|
|
ld t2, OCTEON_CP2_3DES_KEY+8(a0)
|
|
dmtc2 t0, 0x0084
|
|
ld t0, OCTEON_CP2_3DES_KEY+16(a0)
|
|
dmtc2 t1, 0x0080
|
|
ld t1, OCTEON_CP2_3DES_RESULT(a0)
|
|
dmtc2 t2, 0x0081
|
|
ld t2, OCTEON_CP2_AES_INP0(a0) /* only really needed for pass 1 */
|
|
dmtc2 t0, 0x0082
|
|
ld t0, OCTEON_CP2_AES_IV(a0)
|
|
dmtc2 t1, 0x0098
|
|
ld t1, OCTEON_CP2_AES_IV+8(a0)
|
|
dmtc2 t2, 0x010A /* only really needed for pass 1 */
|
|
ld t2, OCTEON_CP2_AES_KEY(a0)
|
|
dmtc2 t0, 0x0102
|
|
ld t0, OCTEON_CP2_AES_KEY+8(a0)
|
|
dmtc2 t1, 0x0103
|
|
ld t1, OCTEON_CP2_AES_KEY+16(a0)
|
|
dmtc2 t2, 0x0104
|
|
ld t2, OCTEON_CP2_AES_KEY+24(a0)
|
|
dmtc2 t0, 0x0105
|
|
ld t0, OCTEON_CP2_AES_KEYLEN(a0)
|
|
dmtc2 t1, 0x0106
|
|
ld t1, OCTEON_CP2_AES_RESULT(a0)
|
|
dmtc2 t2, 0x0107
|
|
ld t2, OCTEON_CP2_AES_RESULT+8(a0)
|
|
mfc0 t3, $15,0 /* Get the processor ID register */
|
|
dmtc2 t0, 0x0110
|
|
li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
|
|
dmtc2 t1, 0x0100
|
|
bne t0, t3, 3f /* Skip the next stuff for non-pass1 */
|
|
dmtc2 t2, 0x0101
|
|
|
|
/* this code is specific for pass 1 */
|
|
ld t0, OCTEON_CP2_HSH_DATW(a0)
|
|
ld t1, OCTEON_CP2_HSH_DATW+8(a0)
|
|
ld t2, OCTEON_CP2_HSH_DATW+16(a0)
|
|
dmtc2 t0, 0x0040
|
|
ld t0, OCTEON_CP2_HSH_DATW+24(a0)
|
|
dmtc2 t1, 0x0041
|
|
ld t1, OCTEON_CP2_HSH_DATW+32(a0)
|
|
dmtc2 t2, 0x0042
|
|
ld t2, OCTEON_CP2_HSH_DATW+40(a0)
|
|
dmtc2 t0, 0x0043
|
|
ld t0, OCTEON_CP2_HSH_DATW+48(a0)
|
|
dmtc2 t1, 0x0044
|
|
ld t1, OCTEON_CP2_HSH_IVW(a0)
|
|
dmtc2 t2, 0x0045
|
|
ld t2, OCTEON_CP2_HSH_IVW+8(a0)
|
|
dmtc2 t0, 0x0046
|
|
ld t0, OCTEON_CP2_HSH_IVW+16(a0)
|
|
dmtc2 t1, 0x0048
|
|
dmtc2 t2, 0x0049
|
|
b done_restore /* unconditional branch */
|
|
dmtc2 t0, 0x004A
|
|
|
|
3: /* this is post-pass1 code */
|
|
ld t2, OCTEON_CP2_HSH_DATW(a0)
|
|
ld t0, OCTEON_CP2_HSH_DATW+8(a0)
|
|
ld t1, OCTEON_CP2_HSH_DATW+16(a0)
|
|
dmtc2 t2, 0x0240
|
|
ld t2, OCTEON_CP2_HSH_DATW+24(a0)
|
|
dmtc2 t0, 0x0241
|
|
ld t0, OCTEON_CP2_HSH_DATW+32(a0)
|
|
dmtc2 t1, 0x0242
|
|
ld t1, OCTEON_CP2_HSH_DATW+40(a0)
|
|
dmtc2 t2, 0x0243
|
|
ld t2, OCTEON_CP2_HSH_DATW+48(a0)
|
|
dmtc2 t0, 0x0244
|
|
ld t0, OCTEON_CP2_HSH_DATW+56(a0)
|
|
dmtc2 t1, 0x0245
|
|
ld t1, OCTEON_CP2_HSH_DATW+64(a0)
|
|
dmtc2 t2, 0x0246
|
|
ld t2, OCTEON_CP2_HSH_DATW+72(a0)
|
|
dmtc2 t0, 0x0247
|
|
ld t0, OCTEON_CP2_HSH_DATW+80(a0)
|
|
dmtc2 t1, 0x0248
|
|
ld t1, OCTEON_CP2_HSH_DATW+88(a0)
|
|
dmtc2 t2, 0x0249
|
|
ld t2, OCTEON_CP2_HSH_DATW+96(a0)
|
|
dmtc2 t0, 0x024A
|
|
ld t0, OCTEON_CP2_HSH_DATW+104(a0)
|
|
dmtc2 t1, 0x024B
|
|
ld t1, OCTEON_CP2_HSH_DATW+112(a0)
|
|
dmtc2 t2, 0x024C
|
|
ld t2, OCTEON_CP2_HSH_IVW(a0)
|
|
dmtc2 t0, 0x024D
|
|
ld t0, OCTEON_CP2_HSH_IVW+8(a0)
|
|
dmtc2 t1, 0x024E
|
|
ld t1, OCTEON_CP2_HSH_IVW+16(a0)
|
|
dmtc2 t2, 0x0250
|
|
ld t2, OCTEON_CP2_HSH_IVW+24(a0)
|
|
dmtc2 t0, 0x0251
|
|
ld t0, OCTEON_CP2_HSH_IVW+32(a0)
|
|
dmtc2 t1, 0x0252
|
|
ld t1, OCTEON_CP2_HSH_IVW+40(a0)
|
|
dmtc2 t2, 0x0253
|
|
ld t2, OCTEON_CP2_HSH_IVW+48(a0)
|
|
dmtc2 t0, 0x0254
|
|
ld t0, OCTEON_CP2_HSH_IVW+56(a0)
|
|
dmtc2 t1, 0x0255
|
|
ld t1, OCTEON_CP2_GFM_MULT(a0)
|
|
dmtc2 t2, 0x0256
|
|
ld t2, OCTEON_CP2_GFM_MULT+8(a0)
|
|
dmtc2 t0, 0x0257
|
|
ld t0, OCTEON_CP2_GFM_POLY(a0)
|
|
dmtc2 t1, 0x0258
|
|
ld t1, OCTEON_CP2_GFM_RESULT(a0)
|
|
dmtc2 t2, 0x0259
|
|
ld t2, OCTEON_CP2_GFM_RESULT+8(a0)
|
|
dmtc2 t0, 0x025E
|
|
dmtc2 t1, 0x025A
|
|
dmtc2 t2, 0x025B
|
|
|
|
done_restore:
|
|
jr ra
|
|
nop
|
|
END(octeon_cop2_restore)
|
|
.set pop
|
|
|
|
/*
|
|
* void octeon_mult_save()
|
|
* sp is assumed to point to a struct pt_regs
|
|
*
|
|
* NOTE: This is called in SAVE_SOME in stackframe.h. It can only
|
|
* safely modify k0 and k1.
|
|
*/
|
|
.align 7
|
|
.set push
|
|
.set noreorder
|
|
LEAF(octeon_mult_save)
|
|
dmfc0 k0, $9,7 /* CvmCtl register. */
|
|
bbit1 k0, 27, 1f /* Skip CvmCtl[NOMUL] */
|
|
nop
|
|
|
|
/* Save the multiplier state */
|
|
v3mulu k0, $0, $0
|
|
v3mulu k1, $0, $0
|
|
sd k0, PT_MTP(sp) /* PT_MTP has P0 */
|
|
v3mulu k0, $0, $0
|
|
sd k1, PT_MTP+8(sp) /* PT_MTP+8 has P1 */
|
|
ori k1, $0, 1
|
|
v3mulu k1, k1, $0
|
|
sd k0, PT_MTP+16(sp) /* PT_MTP+16 has P2 */
|
|
v3mulu k0, $0, $0
|
|
sd k1, PT_MPL(sp) /* PT_MPL has MPL0 */
|
|
v3mulu k1, $0, $0
|
|
sd k0, PT_MPL+8(sp) /* PT_MPL+8 has MPL1 */
|
|
jr ra
|
|
sd k1, PT_MPL+16(sp) /* PT_MPL+16 has MPL2 */
|
|
|
|
1: /* Resume here if CvmCtl[NOMUL] */
|
|
jr ra
|
|
END(octeon_mult_save)
|
|
.set pop
|
|
|
|
/*
|
|
* void octeon_mult_restore()
|
|
* sp is assumed to point to a struct pt_regs
|
|
*
|
|
* NOTE: This is called in RESTORE_SOME in stackframe.h.
|
|
*/
|
|
.align 7
|
|
.set push
|
|
.set noreorder
|
|
LEAF(octeon_mult_restore)
|
|
dmfc0 k1, $9,7 /* CvmCtl register. */
|
|
ld v0, PT_MPL(sp) /* MPL0 */
|
|
ld v1, PT_MPL+8(sp) /* MPL1 */
|
|
ld k0, PT_MPL+16(sp) /* MPL2 */
|
|
bbit1 k1, 27, 1f /* Skip CvmCtl[NOMUL] */
|
|
/* Normally falls through, so no time wasted here */
|
|
nop
|
|
|
|
/* Restore the multiplier state */
|
|
ld k1, PT_MTP+16(sp) /* P2 */
|
|
MTM0 v0 /* MPL0 */
|
|
ld v0, PT_MTP+8(sp) /* P1 */
|
|
MTM1 v1 /* MPL1 */
|
|
ld v1, PT_MTP(sp) /* P0 */
|
|
MTM2 k0 /* MPL2 */
|
|
MTP2 k1 /* P2 */
|
|
MTP1 v0 /* P1 */
|
|
jr ra
|
|
MTP0 v1 /* P0 */
|
|
|
|
1: /* Resume here if CvmCtl[NOMUL] */
|
|
jr ra
|
|
nop
|
|
END(octeon_mult_restore)
|
|
.set pop
|