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[src/trunk]: src/sys/arch/powerpc/oea Re-factor the code in pmap_extract() th...
details: https://anonhg.NetBSD.org/src/rev/ff731b6259c1
branches: trunk
changeset: 953540:ff731b6259c1
user: thorpej <thorpej%NetBSD.org@localhost>
date: Fri Mar 12 04:57:42 2021 +0000
description:
Re-factor the code in pmap_extract() that checks the 601 I/O segment
table and the BAT tables into separate functions that can be called
from outside of the pmap module.
diffstat:
sys/arch/powerpc/include/oea/pmap.h | 9 ++-
sys/arch/powerpc/oea/pmap.c | 139 +++++++++++++++++++++++------------
2 files changed, 97 insertions(+), 51 deletions(-)
diffs (199 lines):
diff -r 91efd118587a -r ff731b6259c1 sys/arch/powerpc/include/oea/pmap.h
--- a/sys/arch/powerpc/include/oea/pmap.h Fri Mar 12 01:54:29 2021 +0000
+++ b/sys/arch/powerpc/include/oea/pmap.h Fri Mar 12 04:57:42 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.h,v 1.34 2021/03/02 01:47:44 thorpej Exp $ */
+/* $NetBSD: pmap.h,v 1.35 2021/03/12 04:57:42 thorpej Exp $ */
/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -158,6 +158,13 @@
int pmap_ste_spill(pmap_t, vaddr_t, bool);
void pmap_pinit(pmap_t);
+#ifdef PPC_OEA601
+bool pmap_extract_ioseg601(vaddr_t, paddr_t *);
+#endif /* PPC_OEA601 */
+#ifdef PPC_OEA
+bool pmap_extract_battable(vaddr_t, paddr_t *);
+#endif /* PPC_OEA */
+
u_int powerpc_mmap_flags(paddr_t);
#define POWERPC_MMAP_FLAG_MASK 0xf
#define POWERPC_MMAP_FLAG_PREFETCHABLE 0x1
diff -r 91efd118587a -r ff731b6259c1 sys/arch/powerpc/oea/pmap.c
--- a/sys/arch/powerpc/oea/pmap.c Fri Mar 12 01:54:29 2021 +0000
+++ b/sys/arch/powerpc/oea/pmap.c Fri Mar 12 04:57:42 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.103 2021/03/11 04:43:47 thorpej Exp $ */
+/* $NetBSD: pmap.c,v 1.104 2021/03/12 04:57:42 thorpej Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
@@ -63,7 +63,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.103 2021/03/11 04:43:47 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.104 2021/03/12 04:57:42 thorpej Exp $");
#define PMAP_NOOPNAMES
@@ -2087,6 +2087,66 @@
PMAP_UNLOCK();
}
+#if defined(PMAP_OEA)
+#ifdef PPC_OEA601
+bool
+pmap_extract_ioseg601(vaddr_t va, paddr_t *pap)
+{
+ if ((MFPVR() >> 16) != MPC601)
+ return false;
+
+ const register_t sr = iosrtable[va >> ADDR_SR_SHFT];
+
+ if (SR601_VALID_P(sr) && SR601_PA_MATCH_P(sr, va)) {
+ if (pap)
+ *pap = va;
+ return true;
+ }
+ return false;
+}
+
+static bool
+pmap_extract_battable601(vaddr_t va, paddr_t *pap)
+{
+ const register_t batu = battable[va >> 23].batu;
+ const register_t batl = battable[va >> 23].batl;
+
+ if (BAT601_VALID_P(batl) && BAT601_VA_MATCH_P(batu, batl, va)) {
+ const register_t mask =
+ (~(batl & BAT601_BSM) << 17) & ~0x1ffffL;
+ if (pap)
+ *pap = (batl & mask) | (va & ~mask);
+ return true;
+ }
+ return false;
+}
+#endif /* PPC_OEA601 */
+
+bool
+pmap_extract_battable(vaddr_t va, paddr_t *pap)
+{
+#ifdef PPC_OEA601
+ if ((MFPVR() >> 16) == MPC601)
+ return pmap_extract_battable601(va, pap);
+#endif /* PPC_OEA601 */
+
+ if (oeacpufeat & OEACPU_NOBAT)
+ return false;
+
+ const register_t batu = battable[BAT_VA2IDX(va)].batu;
+
+ if (BAT_VALID_P(batu, 0) && BAT_VA_MATCH_P(batu, va)) {
+ const register_t batl = battable[BAT_VA2IDX(va)].batl;
+ const register_t mask =
+ (~(batu & (BAT_XBL|BAT_BL)) << 15) & ~0x1ffffL;
+ if (pap)
+ *pap = (batl & mask) | (va & ~mask);
+ return true;
+ }
+ return false;
+}
+#endif /* PMAP_OEA */
+
/*
* Get the physical page address for the given pmap/virtual address.
*/
@@ -2099,63 +2159,42 @@
PMAP_LOCK();
/*
- * If this is a kernel pmap lookup, also check the battable
- * and if we get a hit, translate the VA to a PA using the
- * BAT entries. Don't check for VM_MAX_KERNEL_ADDRESS is
- * that will wrap back to 0.
+ * If this is the kernel pmap, check the battable and I/O
+ * segments for a hit. This is done only for regions outside
+ * VM_MIN_KERNEL_ADDRESS-VM_MAX_KERNEL_ADDRESS.
+ *
+ * Be careful when checking VM_MAX_KERNEL_ADDRESS; you don't
+ * want to wrap around to 0.
*/
if (pm == pmap_kernel() &&
(va < VM_MIN_KERNEL_ADDRESS ||
(KERNEL2_SR < 15 && VM_MAX_KERNEL_ADDRESS <= va))) {
KASSERT((va >> ADDR_SR_SHFT) != USER_SR);
-#if defined (PMAP_OEA)
+#if defined(PMAP_OEA)
#ifdef PPC_OEA601
- if ((MFPVR() >> 16) == MPC601) {
- register_t batu = battable[va >> 23].batu;
- register_t batl = battable[va >> 23].batl;
- register_t sr = iosrtable[va >> ADDR_SR_SHFT];
- if (BAT601_VALID_P(batl) &&
- BAT601_VA_MATCH_P(batu, batl, va)) {
- register_t mask =
- (~(batl & BAT601_BSM) << 17) & ~0x1ffffL;
- if (pap)
- *pap = (batl & mask) | (va & ~mask);
- PMAP_UNLOCK();
- return true;
- } else if (SR601_VALID_P(sr) &&
- SR601_PA_MATCH_P(sr, va)) {
- if (pap)
- *pap = va;
- PMAP_UNLOCK();
- return true;
- }
- } else
+ if (pmap_extract_ioseg601(va, pap)) {
+ PMAP_UNLOCK();
+ return true;
+ }
#endif /* PPC_OEA601 */
- {
- register_t batu = battable[BAT_VA2IDX(va)].batu;
- if (BAT_VALID_P(batu,0) && BAT_VA_MATCH_P(batu,va)) {
- register_t batl = battable[BAT_VA2IDX(va)].batl;
- register_t mask =
- (~(batu & (BAT_XBL|BAT_BL)) << 15) & ~0x1ffffL;
- if (pap)
- *pap = (batl & mask) | (va & ~mask);
- PMAP_UNLOCK();
- return true;
- }
- }
- PMAP_UNLOCK();
- return false;
-#elif defined (PMAP_OEA64_BRIDGE)
- if (va >= SEGMENT_LENGTH)
- panic("%s: pm: %s va >= SEGMENT_LENGTH, va: 0x%08lx\n",
- __func__, (pm == pmap_kernel() ? "kernel" : "user"), va);
- else {
- if (pap)
- *pap = va;
+ if (pmap_extract_battable(va, pap)) {
PMAP_UNLOCK();
return true;
- }
-#elif defined (PMAP_OEA64)
+ }
+ /*
+ * We still check the HTAB...
+ */
+#elif defined(PMAP_OEA64_BRIDGE)
+ if (va < SEGMENT_LENGTH) {
+ if (pap)
+ *pap = va;
+ PMAP_UNLOCK();
+ return true;
+ }
+ /*
+ * We still check the HTAB...
+ */
+#elif defined(PMAP_OEA64)
#error PPC_OEA64 not supported
#endif /* PPC_OEA */
}
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