svn commit: r296094 - in head/sys/riscv: include riscv

[Ruslan Bukin]

Author: br
Date: Fri Feb 26 14:04:00 2016
New Revision: 296094
URL: https://svnweb.freebsd.org/changeset/base/296094

Log:
  o Use uint64_t for page number as it doesn't fit uint32_t.
  o Implement growkernel bits for L1 level of pagetables.
  
  This allows us to boot with 128GB of physical memory.
  
  Sponsored by: DARPA, AFRL
  Sponsored by: HEIF5

Modified:
  head/sys/riscv/include/pte.h
  head/sys/riscv/riscv/pmap.c

Modified: head/sys/riscv/include/pte.h
==============================================================================
--- head/sys/riscv/include/pte.h        Fri Feb 26 13:53:09 2016        
(r296093)
+++ head/sys/riscv/include/pte.h        Fri Feb 26 14:04:00 2016        
(r296094)
@@ -41,6 +41,7 @@
 #ifndef LOCORE
 typedef        uint64_t        pd_entry_t;             /* page directory entry 
*/
 typedef        uint64_t        pt_entry_t;             /* page table entry */
+typedef        uint64_t        pn_t;                   /* page number */
 #endif
 
 /* Level 0 table, 512GiB per entry */

Modified: head/sys/riscv/riscv/pmap.c
==============================================================================
--- head/sys/riscv/riscv/pmap.c Fri Feb 26 13:53:09 2016        (r296093)
+++ head/sys/riscv/riscv/pmap.c Fri Feb 26 14:04:00 2016        (r296094)
@@ -450,7 +450,7 @@ pmap_bootstrap_dmap(vm_offset_t l1pt, vm
        pd_entry_t *l1;
        u_int l1_slot;
        pt_entry_t entry;
-       u_int pn;
+       pn_t pn;
 
        pa = kernstart & ~L1_OFFSET;
        va = DMAP_MIN_ADDRESS;
@@ -924,7 +924,7 @@ pmap_qenter(vm_offset_t sva, vm_page_t *
        vm_offset_t va;
        vm_page_t m;
        pt_entry_t entry;
-       u_int pn;
+       pn_t pn;
        int i;
 
        va = sva;
@@ -1143,7 +1143,7 @@ _pmap_alloc_l3(pmap_t pmap, vm_pindex_t 
        vm_page_t m, /*pdppg, */pdpg;
        pt_entry_t entry;
        vm_paddr_t phys;
-       int pn;
+       pn_t pn;
 
        PMAP_LOCK_ASSERT(pmap, MA_OWNED);
 
@@ -1323,7 +1323,7 @@ pmap_growkernel(vm_offset_t addr)
        vm_page_t nkpg;
        pd_entry_t *l1, *l2;
        pt_entry_t entry;
-       int pn;
+       pn_t pn;
 
        mtx_assert(&kernel_map->system_mtx, MA_OWNED);
 
@@ -1343,10 +1343,11 @@ pmap_growkernel(vm_offset_t addr)
                                pmap_zero_page(nkpg);
                        paddr = VM_PAGE_TO_PHYS(nkpg);
 
-                       panic("%s: implement grow l1\n", __func__);
-#if 0
-                       pmap_load_store(l1, paddr | L1_TABLE);
-#endif
+                       pn = (paddr / PAGE_SIZE);
+                       entry = (PTE_VALID | (PTE_TYPE_PTR << PTE_TYPE_S));
+                       entry |= (pn << PTE_PPN0_S);
+                       pmap_load_store(l1, entry);
+
                        PTE_SYNC(l1);
                        continue; /* try again */
                }
@@ -1933,9 +1934,9 @@ pmap_enter(pmap_t pmap, vm_offset_t va, 
        vm_page_t mpte, om, l2_m, l3_m;
        boolean_t nosleep;
        pt_entry_t entry;
-       int l2_pn;
-       int l3_pn;
-       int pn;
+       pn_t l2_pn;
+       pn_t l3_pn;
+       pn_t pn;
 
        va = trunc_page(va);
        if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m))
@@ -2211,7 +2212,7 @@ pmap_enter_quick_locked(pmap_t pmap, vm_
        pt_entry_t *l3;
        vm_paddr_t pa;
        pt_entry_t entry;
-       int pn;
+       pn_t pn;
 
        KASSERT(va < kmi.clean_sva || va >= kmi.clean_eva ||
            (m->oflags & VPO_UNMANAGED) != 0,
@@ -3084,8 +3085,8 @@ pmap_mincore(pmap_t pmap, vm_offset_t ad
 void
 pmap_activate(struct thread *td)
 {
-       uint64_t entry;
-       uint64_t pn;
+       pt_entry_t entry;
+       pn_t pn;
        pmap_t pmap;
 
        critical_enter();
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