Add a new pmap entry point, pmap_enter_temporary() to be used during

dumps to create temporary page mappings. This replaces the use of CADDR1
which is fairly x86 specific.

Reviewed by: dillon

sys/alpha/alpha/pmap.c

@@ -90,9 +90,7 @@
  * should the kernel Lev1map be inserted into this object?).
  * 
  * pvtmmap is not needed for alpha since K0SEG maps all of physical
- * memory. CADDR1 and CADDR2 are not needed for the same reason.  The
- * only places outside pmap and machdep which use CADDR1 are xxdump
- * routines which use them for dumping physical pages.
+ * memory.
  * 
  * 
  * alpha virtual memory map:
@@ -341,14 +339,6 @@ static int pv_entry_count=0, pv_entry_max=0, pv_entry_high_water=0;
 static int pmap_pagedaemon_waken = 0;
 static struct pv_entry *pvinit;
 
-/*
- * All those kernel PT submaps that BSD is so fond of
- */
-pt_entry_t *CMAP1 = 0;
-static pt_entry_t *CMAP2;
-caddr_t CADDR1;
-static caddr_t CADDR2;
-
 static PMAP_INLINE void	free_pv_entry __P((pv_entry_t pv));
 static pv_entry_t get_pv_entry __P((void));
 static void	alpha_protection_init __P((void));
@@ -578,16 +568,8 @@ pmap_bootstrap(vm_offset_t ptaddr, u_int maxasn)
 	va = virtual_avail;
 	pte = pmap_lev3pte(kernel_pmap, va);
 
-	/*
-	 * CMAP1/CMAP2 are used for zeroing and copying pages.
-	 */
-	SYSMAP(caddr_t, CMAP1, CADDR1, 1)
-	SYSMAP(caddr_t, CMAP2, CADDR2, 1)
-
 	virtual_avail = va;
 
-	*CMAP1 = *CMAP2 = 0;
-
 	/*
 	 * Set up proc0's PCB such that the ptbr points to the right place
 	 * and has the kernel pmap's.
@@ -2219,6 +2201,16 @@ pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_page_t mpte)
 	return mpte;
 }
 
+/*
+ * Make temporary mapping for a physical address. This is called
+ * during dump.
+ */
+vm_offset_t
+pmap_enter_temporary(vm_offset_t pa, vm_prot_t prot)
+{
+	return ALPHA_PHYS_TO_K0SEG(pa);
+}
+
 #define MAX_INIT_PT (96)
 /*
  * pmap_object_init_pt preloads the ptes for a given object

sys/amd64/amd64/pmap.c

@@ -2240,6 +2240,17 @@ pmap_enter_quick(pmap, va, m, mpte)
 	return mpte;
 }
 
+/*
+ * Make temporary mapping for a physical address using CADDR1. This is
+ * called during dump.
+ */
+vm_offset_t
+pmap_enter_temporary(vm_offset_t pa, vm_prot_t prot)
+{
+	pmap_enter(kernel_pmap, (vm_offset_t) CADDR1, pa, prot, TRUE);
+	return (vm_offset_t) CADDR1;
+}
+
 #define MAX_INIT_PT (96)
 /*
  * pmap_object_init_pt preloads the ptes for a given object

sys/cam/scsi/scsi_da.c

@@ -631,11 +631,14 @@ dadump(dev_t dev)
 	blkcnt = howmany(PAGE_SIZE, secsize);
 
 	while (num > 0) {
+		vm_offset_t va;
 
 		if (is_physical_memory(addr)) {
-			pmap_kenter((vm_offset_t)CADDR1, trunc_page(addr));
+			va = pmap_enter_temporary(trunc_page(addr),
+						  VM_PROT_READ);
 		} else {
-			pmap_kenter((vm_offset_t)CADDR1, trunc_page(0));
+			va = pmap_enter_temporary(trunc_page(0),
+						  VM_PROT_READ);
 		}
 
 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
@@ -649,7 +652,7 @@ dadump(dev_t dev)
 				/*minimum_cmd_size*/ softc->minimum_cmd_size,
 				blknum,
 				blkcnt,
-				/*data_ptr*/CADDR1,
+				/*data_ptr*/(u_int8_t *) va,
 				/*dxfer_len*/blkcnt * secsize,
 				/*sense_len*/SSD_FULL_SIZE,
 				DA_DEFAULT_TIMEOUT * 1000);		

sys/dev/ata/ata-disk.c

@@ -272,17 +272,18 @@ addump(dev_t dev)
     ata_reinit(adp->controller);
 
     while (count > 0) {
+	vm_offset_t va;
 	DELAY(1000);
 	if (is_physical_memory(addr))
-	    pmap_kenter((vm_offset_t)CADDR1, trunc_page(addr));
+	    va = pmap_enter_temporary(trunc_page(addr), VM_PROT_READ);
 	else
-	    pmap_kenter((vm_offset_t)CADDR1, trunc_page(0));
+	    va = pmap_enter_temporary(trunc_page(0), VM_PROT_READ);
 
 	bzero(&request, sizeof(struct ad_request));
 	request.device = adp;
 	request.blockaddr = blkno;
 	request.bytecount = PAGE_SIZE;
-	request.data = CADDR1;
+	request.data = (int8_t *) va;
 
 	while (request.bytecount > 0) {
 	    ad_transfer(&request);

sys/i386/i386/pmap.c

@@ -2240,6 +2240,17 @@ pmap_enter_quick(pmap, va, m, mpte)
 	return mpte;
 }
 
+/*
+ * Make temporary mapping for a physical address using CADDR1. This is
+ * called during dump.
+ */
+vm_offset_t
+pmap_enter_temporary(vm_offset_t pa, vm_prot_t prot)
+{
+	pmap_enter(kernel_pmap, (vm_offset_t) CADDR1, pa, prot, TRUE);
+	return (vm_offset_t) CADDR1;
+}
+
 #define MAX_INIT_PT (96)
 /*
  * pmap_object_init_pt preloads the ptes for a given object

sys/vm/pmap.h

@@ -140,6 +140,7 @@ void		 pmap_swapout_proc __P((struct proc *p));
 void		 pmap_swapin_proc __P((struct proc *p));
 void		 pmap_activate __P((struct proc *p));
 vm_offset_t	 pmap_addr_hint __P((vm_object_t obj, vm_offset_t addr, vm_size_t size));
+vm_offset_t	 pmap_enter_temporary __P((vm_offset_t pa, vm_prot_t prot));
 void		 pmap_init2 __P((void));
 
 #endif /* _KERNEL */