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[src/trunk]: src/sys/arch/arm/arm32 Add tlb routines for pmap_tlb.c
details: https://anonhg.NetBSD.org/src/rev/47b027035350
branches: trunk
changeset: 328178:47b027035350
user: matt <matt%NetBSD.org@localhost>
date: Fri Mar 28 21:51:21 2014 +0000
description:
Add tlb routines for pmap_tlb.c
diffstat:
sys/arch/arm/arm32/arm32_tlb.c | 200 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 200 insertions(+), 0 deletions(-)
diffs (204 lines):
diff -r 5d8c9a72b269 -r 47b027035350 sys/arch/arm/arm32/arm32_tlb.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/arm32/arm32_tlb.c Fri Mar 28 21:51:21 2014 +0000
@@ -0,0 +1,200 @@
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__KERNEL_RCSID(1, "$NetBSD: arm32_tlb.c,v 1.1 2014/03/28 21:51:21 matt Exp $");
+
+#include <sys/param.h>
+#include <sys/types.h>
+
+#include <uvm/uvm.h>
+
+#include <arm/locore.h>
+
+bool arm_has_tlbiasid_p; // CPU supports TLBIASID system coprocessor op
+
+tlb_asid_t
+tlb_get_asid(void)
+{
+ return armreg_contextidr_read() & 0xff;
+}
+
+void
+tlb_set_asid(tlb_asid_t asid)
+{
+ arm_dsb();
+ if (asid == 0) {
+ armreg_ttbcr_write(armreg_ttbcr_read() | TTBCR_S_PD0);
+ }
+ armreg_contextidr_write(asid);
+ arm_isb();
+}
+
+void
+tlb_invalidate_all(void)
+{
+ arm_dsb();
+ armreg_tlbiall_write(0);
+ arm_isb();
+}
+
+void
+tlb_invalidate_globals(void)
+{
+ tlb_invalidate_all();
+}
+
+void
+tlb_invalidate_asids(tlb_asid_t lo, tlb_asid_t hi)
+{
+ arm_dsb();
+ if (arm_has_tlbiasid_p) {
+ armreg_tlbiall_write(0);
+ } else {
+ for (; lo <= hi; lo++) {
+ armreg_tlbiasid_write(lo);
+ }
+ }
+ arm_isb();
+}
+
+void
+tlb_invalidate_addr(vaddr_t va, tlb_asid_t asid)
+{
+ arm_dsb();
+ va = trunc_page(va) | asid;
+ for (vaddr_t eva = va + PAGE_SIZE; va < eva; va += L2_S_SIZE) {
+ armreg_tlbimva_write(va);
+ //armreg_tlbiall_write(asid);
+ }
+ arm_isb();
+}
+
+bool
+tlb_update_addr(vaddr_t va, tlb_asid_t asid, pt_entry_t pte, bool insert_p)
+{
+ tlb_invalidate_addr(va, asid);
+ return true;
+}
+
+#if !defined(MULTIPROCESSOR) && defined(CPU_CORTEXA5)
+static u_int
+tlb_cortex_a5_record_asids(u_long *mapp)
+{
+ u_int nasids = 0;
+ for (size_t va_index = 0; va_index < 63; va_index++) {
+ for (size_t way = 0; way < 2; way++) {
+ armreg_tlbdataop_write(
+ __SHIFTIN(way, ARM_TLBDATAOP_WAY)
+ | __SHIFTIN(va_index, ARM_A5_TLBDATAOP_INDEX));
+ arm_isb();
+ const uint64_t d = ((uint64_t) armreg_tlbdata1_read())
+ | armreg_tlbdata0_read();
+ if (!(d & ARM_TLBDATA_VALID)
+ || !(d & ARM_V5_TLBDATA_nG))
+ continue;
+
+ const tlb_asid_t asid = __SHIFTOUT(d,
+ ARM_V5_TLBDATA_ASID);
+ const u_long mask = 1L << (asid & 31);
+ const size_t idx = asid >> 5;
+ if (mapp[idx] & mask)
+ continue;
+
+ mapp[idx] |= mask;
+ nasids++;
+ }
+ }
+ return nasids;
+}
+#endif
+
+#if !defined(MULTIPROCESSOR) && defined(CPU_CORTEXA7)
+static u_int
+tlb_cortex_a7_record_asids(u_long *mapp)
+{
+ u_int nasids = 0;
+ for (size_t va_index = 0; va_index < 128; va_index++) {
+ for (size_t way = 0; way < 2; way++) {
+ armreg_tlbdataop_write(
+ __SHIFTIN(way, ARM_TLBDATAOP_WAY)
+ | __SHIFTIN(va_index, ARM_A7_TLBDATAOP_INDEX));
+ arm_isb();
+ const uint32_t d0 = armreg_tlbdata0_read();
+ const uint32_t d1 = armreg_tlbdata1_read();
+ if (!(d0 & ARM_TLBDATA_VALID)
+ || !(d1 & ARM_A7_TLBDATA1_nG))
+ continue;
+
+ const uint64_t d01 = ((uint64_t) d1)|d0;
+ const tlb_asid_t asid = __SHIFTOUT(d01,
+ ARM_A7_TLBDATA01_ASID);
+ const u_long mask = 1L << (asid & 31);
+ const size_t idx = asid >> 5;
+ if (mapp[idx] & mask)
+ continue;
+
+ mapp[idx] |= mask;
+ nasids++;
+ }
+ }
+ return nasids;
+}
+#endif
+
+u_int
+tlb_record_asids(u_long *mapp)
+{
+#ifndef MULTIPROCESSOR
+#ifdef CPU_CORTEXA5
+ if (CPU_ID_CORTEX_A5_P(curcpu()->ci_arm_cpuid))
+ return tlb_cortex_a5_record_asids(mapp);
+#endif
+#ifdef CPU_CORTEXA7
+ if (CPU_ID_CORTEX_A7_P(curcpu()->ci_arm_cpuid))
+ return tlb_cortex_a7_record_asids(mapp);
+#endif
+#endif /* MULTIPROCESSOR */
+#ifdef DIAGNOSTIC
+ mapp[0] = 0xfffffffe;
+ mapp[1] = 0xffffffff;
+ mapp[2] = 0xffffffff;
+ mapp[3] = 0xffffffff;
+ mapp[4] = 0xffffffff;
+ mapp[5] = 0xffffffff;
+ mapp[6] = 0xffffffff;
+ mapp[7] = 0xffffffff;
+#endif
+ return 255;
+}
+
+void
+tlb_walk(void *ctx, bool (*func)(void *, vaddr_t, tlb_asid_t, pt_entry_t))
+{
+ /* no way to view the TLB */
+}
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