diff options
| -rw-r--r-- | arch/arm/mm/proc-v7.S | 68 |
1 files changed, 38 insertions, 30 deletions
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index 19c1c8b7c3bb..003190ae9cd8 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -252,7 +252,7 @@ ENDPROC(cpu_pj4b_do_resume) * Initialise TLB, Caches, and MMU state ready to switch the MMU * on. Return in r0 the new CP15 C1 control register setting. * - * r1, r2, r4, r5, r9 must be preserved. + * r1, r2, r4, r5, r9, r13 must be preserved - r13 is not a stack * r4: TTBR0 (low word) * r5: TTBR0 (high word if LPAE) * r8: TTBR1 @@ -285,57 +285,65 @@ __v7_ca17mp_setup: #endif b __v7_setup +/* + * Errata: + * r0, r10 available for use + * r1, r2, r4, r5, r9, r13: must be preserved + * r3: contains MIDR rX number in bits 23-20 + * r6: contains MIDR rXpY as 8-bit XY number + * r9: MIDR + */ __ca8_errata: #if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM) teq r3, #0x00100000 @ only present in r1p* - mrceq p15, 0, r10, c1, c0, 1 @ read aux control register - orreq r10, r10, #(1 << 6) @ set IBE to 1 - mcreq p15, 0, r10, c1, c0, 1 @ write aux control register + mrceq p15, 0, r0, c1, c0, 1 @ read aux control register + orreq r0, r0, #(1 << 6) @ set IBE to 1 + mcreq p15, 0, r0, c1, c0, 1 @ write aux control register #endif #ifdef CONFIG_ARM_ERRATA_458693 teq r6, #0x20 @ only present in r2p0 - mrceq p15, 0, r10, c1, c0, 1 @ read aux control register - orreq r10, r10, #(1 << 5) @ set L1NEON to 1 - orreq r10, r10, #(1 << 9) @ set PLDNOP to 1 - mcreq p15, 0, r10, c1, c0, 1 @ write aux control register + mrceq p15, 0, r0, c1, c0, 1 @ read aux control register + orreq r0, r0, #(1 << 5) @ set L1NEON to 1 + orreq r0, r0, #(1 << 9) @ set PLDNOP to 1 + mcreq p15, 0, r0, c1, c0, 1 @ write aux control register #endif #ifdef CONFIG_ARM_ERRATA_460075 teq r6, #0x20 @ only present in r2p0 - mrceq p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register - tsteq r10, #1 << 22 - orreq r10, r10, #(1 << 22) @ set the Write Allocate disable bit - mcreq p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register + mrceq p15, 1, r0, c9, c0, 2 @ read L2 cache aux ctrl register + tsteq r0, #1 << 22 + orreq r0, r0, #(1 << 22) @ set the Write Allocate disable bit + mcreq p15, 1, r0, c9, c0, 2 @ write the L2 cache aux ctrl register #endif b __errata_finish __ca9_errata: #ifdef CONFIG_ARM_ERRATA_742230 cmp r6, #0x22 @ only present up to r2p2 - mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register - orrle r10, r10, #1 << 4 @ set bit #4 - mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register + mrcle p15, 0, r0, c15, c0, 1 @ read diagnostic register + orrle r0, r0, #1 << 4 @ set bit #4 + mcrle p15, 0, r0, c15, c0, 1 @ write diagnostic register #endif #ifdef CONFIG_ARM_ERRATA_742231 teq r6, #0x20 @ present in r2p0 teqne r6, #0x21 @ present in r2p1 teqne r6, #0x22 @ present in r2p2 - mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register - orreq r10, r10, #1 << 12 @ set bit #12 - orreq r10, r10, #1 << 22 @ set bit #22 - mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register + mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register + orreq r0, r0, #1 << 12 @ set bit #12 + orreq r0, r0, #1 << 22 @ set bit #22 + mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register #endif #ifdef CONFIG_ARM_ERRATA_743622 teq r3, #0x00200000 @ only present in r2p* - mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register - orreq r10, r10, #1 << 6 @ set bit #6 - mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register + mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register + orreq r0, r0, #1 << 6 @ set bit #6 + mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register #endif #if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP) ALT_SMP(cmp r6, #0x30) @ present prior to r3p0 ALT_UP_B(1f) - mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register - orrlt r10, r10, #1 << 11 @ set bit #11 - mcrlt p15, 0, r10, c15, c0, 1 @ write diagnostic register + mrclt p15, 0, r0, c15, c0, 1 @ read diagnostic register + orrlt r0, r0, #1 << 11 @ set bit #11 + mcrlt p15, 0, r0, c15, c0, 1 @ write diagnostic register 1: #endif b __errata_finish @@ -343,9 +351,9 @@ __ca9_errata: __ca15_errata: #ifdef CONFIG_ARM_ERRATA_773022 cmp r6, #0x4 @ only present up to r0p4 - mrcle p15, 0, r10, c1, c0, 1 @ read aux control register - orrle r10, r10, #1 << 1 @ disable loop buffer - mcrle p15, 0, r10, c1, c0, 1 @ write aux control register + mrcle p15, 0, r0, c1, c0, 1 @ read aux control register + orrle r0, r0, #1 << 1 @ disable loop buffer + mcrle p15, 0, r0, c1, c0, 1 @ write aux control register #endif b __errata_finish @@ -409,8 +417,8 @@ __v7_setup: bl v7_flush_dcache_louis ldmia r12, {r0-r5, r7, r9, r11, lr} - and r10, r9, #0xff000000 @ ARM? - teq r10, #0x41000000 + and r0, r9, #0xff000000 @ ARM? + teq r0, #0x41000000 bne __errata_finish and r3, r9, #0x00f00000 @ variant and r6, r9, #0x0000000f @ revision |