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authorAndrew Schultz <alschult@umich.edu>2004-05-19 15:58:24 -0400
committerAndrew Schultz <alschult@umich.edu>2004-05-19 15:58:24 -0400
commitf5c7b1358cf0b27c27c10eae42e09949613e24a9 (patch)
tree1b969afae3bd82ee6e126ce94403bdf1112ff1c4 /arch/alpha
parent675b849b50083c1bcde52c806fc5e03702142371 (diff)
downloadgem5-f5c7b1358cf0b27c27c10eae42e09949613e24a9.tar.xz
Remove the uncacheable bit 39 check (needs to be merged in with head tree
if Tru64 is to continue to be supported on Turbolaser) and fixed translation of physical addresses by clearing PA<42:35> when the real uncachable bit (43) is set arch/alpha/ev5.hh: Change to support 256 ASNs and seperate VA_SPACE checks for EV5 and EV6 also add support proper translation of uncacheable physical addresses dev/ide_ctrl.cc: Fix to work with real address translation --HG-- extra : convert_revision : aa3d1c284b8271d4763a8da2509c91bbcf83189a
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/alpha_memory.cc51
-rw-r--r--arch/alpha/ev5.hh13
2 files changed, 24 insertions, 40 deletions
diff --git a/arch/alpha/alpha_memory.cc b/arch/alpha/alpha_memory.cc
index 0c1be519d..1a1c738ec 100644
--- a/arch/alpha/alpha_memory.cc
+++ b/arch/alpha/alpha_memory.cc
@@ -101,25 +101,7 @@ AlphaTLB::checkCacheability(MemReqPtr &req)
* to catch a weird case where both are used, which shouldn't happen.
*/
- if (req->paddr & PA_UNCACHED_BIT_40 ||
- req->paddr & PA_UNCACHED_BIT_39) {
-
-#ifdef DEBUG
- if (req->paddr & PA_UNCACHED_BIT_40) {
- if(uncacheBit39)
- panic("Bit 40 access follows bit 39 access, PA=%x\n",
- req->paddr);
-
- uncacheBit40 = true;
- } else if (req->paddr & PA_UNCACHED_BIT_39) {
- if(uncacheBit40)
- panic("Bit 39 acceess follows bit 40 access, PA=%x\n",
- req->paddr);
-
- uncacheBit39 = true;
- }
-#endif
-
+ if (req->paddr & PA_UNCACHED_BIT_43) {
// IPR memory space not implemented
if (PA_IPR_SPACE(req->paddr))
if (!req->xc->misspeculating())
@@ -128,6 +110,9 @@ AlphaTLB::checkCacheability(MemReqPtr &req)
// mark request as uncacheable
req->flags |= UNCACHEABLE;
+
+ // Clear bits 42:35 of the physical address (10-2 in Tsunami manual)
+ req->paddr &= PA_UNCACHED_MASK;
}
}
@@ -313,10 +298,10 @@ AlphaITB::translate(MemReqPtr &req) const
return ITB_Acv_Fault;
}
- // Check for "superpage" mapping: when SP<1> is set, and
- // VA<42:41> == 2, VA<39:13> maps directly to PA<39:13>.
- if ((MCSR_SP(ipr[AlphaISA::IPR_MCSR]) & 2) &&
- VA_SPACE(req->vaddr) == 2) {
+
+ // VA<42:41> == 2, VA<39:13> maps directly to PA<39:13> for EV5
+ // VA<47:41> == 0x7e, VA<40:13> maps directly to PA<40:13> for EV6
+ if (VA_SPACE_EV6(req->vaddr) == 0x7e) {
// only valid in kernel mode
if (ICM_CM(ipr[AlphaISA::IPR_ICM]) != AlphaISA::mode_kernel) {
@@ -328,11 +313,10 @@ AlphaITB::translate(MemReqPtr &req) const
req->paddr = req->vaddr & PA_IMPL_MASK;
// sign extend the physical address properly
- if (req->paddr & PA_UNCACHED_BIT_39 ||
- req->paddr & PA_UNCACHED_BIT_40)
- req->paddr |= 0xf0000000000ULL;
+ if (req->paddr & PA_UNCACHED_BIT_40)
+ req->paddr |= ULL(0xf0000000000);
else
- req->paddr &= 0xffffffffffULL;
+ req->paddr &= ULL(0xffffffffff);
} else {
// not a physical address: need to look up pte
@@ -499,10 +483,8 @@ AlphaDTB::translate(MemReqPtr &req, bool write) const
return DTB_Fault_Fault;
}
- // Check for "superpage" mapping: when SP<1> is set, and
- // VA<42:41> == 2, VA<39:13> maps directly to PA<39:13>.
- if ((MCSR_SP(ipr[AlphaISA::IPR_MCSR]) & 2) &&
- VA_SPACE(req->vaddr) == 2) {
+ // Check for "superpage" mapping
+ if (VA_SPACE_EV6(req->vaddr) == 0x7e) {
// only valid in kernel mode
if (DTB_CM_CM(ipr[AlphaISA::IPR_DTB_CM]) !=
@@ -517,11 +499,10 @@ AlphaDTB::translate(MemReqPtr &req, bool write) const
req->paddr = req->vaddr & PA_IMPL_MASK;
// sign extend the physical address properly
- if (req->paddr & PA_UNCACHED_BIT_39 ||
- req->paddr & PA_UNCACHED_BIT_40)
- req->paddr |= 0xf0000000000ULL;
+ if (req->paddr & PA_UNCACHED_BIT_40)
+ req->paddr |= ULL(0xf0000000000);
else
- req->paddr &= 0xffffffffffULL;
+ req->paddr &= ULL(0xffffffffff);
} else {
if (write)
diff --git a/arch/alpha/ev5.hh b/arch/alpha/ev5.hh
index bd4115704..636e37adb 100644
--- a/arch/alpha/ev5.hh
+++ b/arch/alpha/ev5.hh
@@ -32,8 +32,8 @@
#define ALT_MODE_AM(X) (((X) >> 3) & 0x3)
#define DTB_CM_CM(X) (((X) >> 3) & 0x3)
-#define DTB_ASN_ASN(X) (((X) >> 57) & 0x7f)
-#define DTB_PTE_PPN(X) (((X) >> 32) & 0x07ffffff)
+#define DTB_ASN_ASN(X) (((X) >> 57) & 0xff)
+#define DTB_PTE_PPN(X) (((X) >> 32) & 0x07fffffff)
#define DTB_PTE_XRE(X) (((X) >> 8) & 0xf)
#define DTB_PTE_XWE(X) (((X) >> 12) & 0xf)
#define DTB_PTE_FONR(X) (((X) >> 1) & 0x1)
@@ -42,8 +42,8 @@
#define DTB_PTE_ASMA(X) (((X) >> 4) & 0x1)
#define ICM_CM(X) (((X) >> 3) & 0x3)
-#define ITB_ASN_ASN(X) (((X) >> 4) & 0x7f)
-#define ITB_PTE_PPN(X) (((X) >> 32) & 0x07ffffff)
+#define ITB_ASN_ASN(X) (((X) >> 4) & 0xff)
+#define ITB_PTE_PPN(X) (((X) >> 32) & 0x07fffffff)
#define ITB_PTE_XRE(X) (((X) >> 8) & 0xf)
#define ITB_PTE_FONR(X) (((X) >> 1) & 0x1)
#define ITB_PTE_FONW(X) (((X) >> 2) & 0x1)
@@ -54,12 +54,15 @@
#define VA_IMPL_MASK ULL(0x000007ffffffffff)
#define VA_IMPL(X) ((X) & VA_IMPL_MASK)
#define VA_VPN(X) (VA_IMPL(X) >> 13)
-#define VA_SPACE(X) (((X) >> 41) & 0x3)
+#define VA_SPACE_EV5(X) (((X) >> 41) & 0x3)
+#define VA_SPACE_EV6(X) (((X) >> 41) & 0x7f)
#define VA_POFS(X) ((X) & 0x1fff)
#define PA_IMPL_MASK ULL(0xfffffffffff) // for Tsunami
#define PA_UNCACHED_BIT_39 ULL(0x8000000000)
#define PA_UNCACHED_BIT_40 ULL(0x10000000000)
+#define PA_UNCACHED_BIT_43 ULL(0x80000000000)
+#define PA_UNCACHED_MASK ULL(0x807ffffffff) // Clear PA<42:35>
#define PA_IPR_SPACE(X) ((X) >= ULL(0xFFFFFF00000))
#define PA_PFN2PA(X) ((X) << 13)