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Date: Thu, 18 Dec 2014 13:17:55 +0300
From: Aleksey Makarov <aleksey.makarov@...iga.com>
To: <linux-mips@...ux-mips.org>
CC: <linux-kernel@...r.kernel.org>,
David Daney <david.daney@...ium.com>,
Aleksey Makarov <aleksey.makarov@...iga.com>,
Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH v2 03/12] MIPS: OCTEON: Save and restore CP2 SHA3 state
From: David Daney <david.daney@...ium.com>
Allocate new save space, and then save/restore the registers if
OCTEON III.
Signed-off-by: David Daney <david.daney@...ium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@...iga.com>
---
arch/mips/include/asm/processor.h | 2 ++
arch/mips/kernel/asm-offsets.c | 1 +
arch/mips/kernel/octeon_switch.S | 43 +++++++++++++++++++++++++++++----------
3 files changed, 35 insertions(+), 11 deletions(-)
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index f1df4cb..a5b8a7f 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -211,6 +211,8 @@ struct octeon_cop2_state {
unsigned long cop2_gfm_poly;
/* DMFC2 rt, 0x025A; DMFC2 rt, 0x025B - Pass2 */
unsigned long cop2_gfm_result[2];
+ /* DMFC2 rt, 0x24F, DMFC2 rt, 0x50, OCTEON III */
+ unsigned long cop2_sha3[2];
};
#define COP2_INIT \
.cp2 = {0,},
diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index b1d84bd..537e6f4 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -382,6 +382,7 @@ void output_octeon_cop2_state_defines(void)
OFFSET(OCTEON_CP2_GFM_RESULT, octeon_cop2_state, cop2_gfm_result);
OFFSET(OCTEON_CP2_HSH_DATW, octeon_cop2_state, cop2_hsh_datw);
OFFSET(OCTEON_CP2_HSH_IVW, octeon_cop2_state, cop2_hsh_ivw);
+ OFFSET(OCTEON_CP2_SHA3, octeon_cop2_state, cop2_sha3);
OFFSET(THREAD_CP2, task_struct, thread.cp2);
OFFSET(THREAD_CVMSEG, task_struct, thread.cvmseg.cvmseg);
BLANK();
diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S
index 2787c01..590ca2d 100644
--- a/arch/mips/kernel/octeon_switch.S
+++ b/arch/mips/kernel/octeon_switch.S
@@ -142,6 +142,8 @@
* void octeon_cop2_save(struct octeon_cop2_state *a0)
*/
.align 7
+ .set push
+ .set noreorder
LEAF(octeon_cop2_save)
dmfc0 t9, $9,7 /* CvmCtl register. */
@@ -152,17 +154,17 @@
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
+ sd t2, OCTEON_CP2_CRC_POLY(a0)
/* 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 */
+ sd t1, OCTEON_CP2_LLM_DAT+8(a0)
/* Save the COP2 crypto state */
/* this part is mostly common to both pass 1 and later revisions */
@@ -193,18 +195,20 @@
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 */
+ mfc0 v0, $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 */
+ li v1, 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
+ beq v0, v1, 2f
+ sd t2, OCTEON_CP2_AES_RESULT+8(a0)
/* the non-pass1 state when !CvmCtl[NOCRYPTO] */
dmfc2 t1, 0x0240
dmfc2 t2, 0x0241
+ ori v1, v1, 0x9500 /* lowest OCTEON III PrId*/
dmfc2 t3, 0x0242
+ subu v1, v0, v1 /* prid - lowest OCTEON III PrId */
dmfc2 t0, 0x0243
sd t1, OCTEON_CP2_HSH_DATW(a0)
dmfc2 t1, 0x0244
@@ -257,8 +261,16 @@
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)
+ bltz v1, 4f
+ sd t0, OCTEON_CP2_GFM_RESULT+8(a0)
+ /* OCTEON III things*/
+ dmfc2 t0, 0x024F
+ dmfc2 t1, 0x0050
+ sd t0, OCTEON_CP2_SHA3(a0)
+ sd t1, OCTEON_CP2_SHA3+8(a0)
+4:
jr ra
+ nop
2: /* pass 1 special stuff when !CvmCtl[NOCRYPTO] */
dmfc2 t3, 0x0040
@@ -284,7 +296,9 @@
3: /* pass 1 or CvmCtl[NOCRYPTO] set */
jr ra
+ nop
END(octeon_cop2_save)
+ .set pop
/*
* void octeon_cop2_restore(struct octeon_cop2_state *a0)
@@ -349,9 +363,9 @@
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 */
+ li v0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
dmtc2 t1, 0x0100
- bne t0, t3, 3f /* Skip the next stuff for non-pass1 */
+ bne v0, t3, 3f /* Skip the next stuff for non-pass1 */
dmtc2 t2, 0x0101
/* this code is specific for pass 1 */
@@ -379,6 +393,7 @@
3: /* this is post-pass1 code */
ld t2, OCTEON_CP2_HSH_DATW(a0)
+ ori v0, v0, 0x9500 /* lowest OCTEON III PrId*/
ld t0, OCTEON_CP2_HSH_DATW+8(a0)
ld t1, OCTEON_CP2_HSH_DATW+16(a0)
dmtc2 t2, 0x0240
@@ -432,9 +447,15 @@
dmtc2 t2, 0x0259
ld t2, OCTEON_CP2_GFM_RESULT+8(a0)
dmtc2 t0, 0x025E
+ subu v0, t3, v0 /* prid - lowest OCTEON III PrId */
dmtc2 t1, 0x025A
- dmtc2 t2, 0x025B
-
+ bltz v0, done_restore
+ dmtc2 t2, 0x025B
+ /* OCTEON III things*/
+ ld t0, OCTEON_CP2_SHA3(a0)
+ ld t1, OCTEON_CP2_SHA3+8(a0)
+ dmtc2 t0, 0x0051
+ dmtc2 t1, 0x0050
done_restore:
jr ra
nop
--
2.1.3
--
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