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powerpc/83xx: Also save/restore SPRG4-7 during suspend
commit36da5ff0be
upstream. The 83xx has 8 SPRG registers and uses at least SPRG4 for DTLB handling LRU. Fixes:2319f12395
("powerpc/mm: e300c2/c3/c4 TLB errata workaround") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 27 additions and 7 deletions
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@ -26,13 +26,13 @@
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#define SS_MSR 0x74
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#define SS_SDR1 0x78
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#define SS_LR 0x7c
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#define SS_SPRG 0x80 /* 4 SPRGs */
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#define SS_DBAT 0x90 /* 8 DBATs */
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#define SS_IBAT 0xd0 /* 8 IBATs */
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#define SS_TB 0x110
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#define SS_CR 0x118
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#define SS_GPREG 0x11c /* r12-r31 */
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#define STATE_SAVE_SIZE 0x16c
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#define SS_SPRG 0x80 /* 8 SPRGs */
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#define SS_DBAT 0xa0 /* 8 DBATs */
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#define SS_IBAT 0xe0 /* 8 IBATs */
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#define SS_TB 0x120
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#define SS_CR 0x128
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#define SS_GPREG 0x12c /* r12-r31 */
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#define STATE_SAVE_SIZE 0x17c
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.section .data
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.align 5
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@ -103,6 +103,16 @@ _GLOBAL(mpc83xx_enter_deep_sleep)
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stw r7, SS_SPRG+12(r3)
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stw r8, SS_SDR1(r3)
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mfspr r4, SPRN_SPRG4
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mfspr r5, SPRN_SPRG5
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mfspr r6, SPRN_SPRG6
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mfspr r7, SPRN_SPRG7
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stw r4, SS_SPRG+16(r3)
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stw r5, SS_SPRG+20(r3)
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stw r6, SS_SPRG+24(r3)
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stw r7, SS_SPRG+28(r3)
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mfspr r4, SPRN_DBAT0U
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mfspr r5, SPRN_DBAT0L
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mfspr r6, SPRN_DBAT1U
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@ -493,6 +503,16 @@ mpc83xx_deep_resume:
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mtspr SPRN_IBAT7U, r6
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mtspr SPRN_IBAT7L, r7
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lwz r4, SS_SPRG+16(r3)
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lwz r5, SS_SPRG+20(r3)
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lwz r6, SS_SPRG+24(r3)
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lwz r7, SS_SPRG+28(r3)
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mtspr SPRN_SPRG4, r4
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mtspr SPRN_SPRG5, r5
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mtspr SPRN_SPRG6, r6
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mtspr SPRN_SPRG7, r7
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lwz r4, SS_SPRG+0(r3)
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lwz r5, SS_SPRG+4(r3)
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lwz r6, SS_SPRG+8(r3)
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