- Use direct mapped addresses for the message buffer, for the crash dump

  mappings, and for pmap_map which is used to map the vm_page structures.
- Don't allocate kva space for any of the above.

3 files changed, 12 insertions, 62 deletions

diff --git a/sys/sparc64/sparc64/dump_machdep.c b/sys/sparc64/sparc64/dump_machdep.c
index b42cb85..17e2326 100644
--- a/sys/sparc64/sparc64/dump_machdep.c
+++ b/sys/sparc64/sparc64/dump_machdep.c
@@ -35,12 +35,14 @@
 #include <sys/kerneldump.h>
 
 #include <vm/vm.h>
+#include <vm/vm_param.h>
 #include <vm/pmap.h>
 
 #include <machine/metadata.h>
 #include <machine/kerneldump.h>
 #include <machine/ofw_mem.h>
 #include <machine/tsb.h>
+#include <machine/tlb.h>
 
 CTASSERT(sizeof(struct kerneldumpheader) == DEV_BSIZE);
 
@@ -132,9 +134,9 @@ reg_write(struct dumperinfo *di, vm_offset_t pa, vm_size_t size)
 static int
 blk_dump(struct dumperinfo *di, vm_offset_t pa, vm_size_t size)
 {
-	vm_size_t pos, npg, rsz;
-	void *va;
-	int c, counter, error, i, twiddle;
+	vm_size_t pos, rsz;
+	vm_offset_t va;
+	int c, counter, error, twiddle;
 
 	printf("  chunk at %#lx: %ld bytes ", (u_long)pa, (long)size);
 
@@ -145,10 +147,8 @@ blk_dump(struct dumperinfo *di, vm_offset_t pa, vm_size_t size)
 			printf("%c\b", "|/-\\"[twiddle++ & 3]);
 		rsz = size - pos;
 		rsz = (rsz > MAXDUMPSZ) ? MAXDUMPSZ : rsz;
-		npg = rsz >> PAGE_SHIFT;
-		for (i = 0; i < npg; i++)
-			va = pmap_kenter_temporary(pa + pos + i * PAGE_SIZE, i);
-		error = di->dumper(di->priv, va, 0, dumplo, rsz);
+		va = TLB_PHYS_TO_DIRECT(pa + pos);
+		error = di->dumper(di->priv, (void *)va, 0, dumplo, rsz);
 		if (error)
 			break;
 		dumplo += rsz;
diff --git a/sys/sparc64/sparc64/machdep.c b/sys/sparc64/sparc64/machdep.c
index 84cf92a..df6722f 100644
--- a/sys/sparc64/sparc64/machdep.c
+++ b/sys/sparc64/sparc64/machdep.c
@@ -198,7 +198,6 @@ sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
 	phandle_t root;
 	struct pcpu *pc;
 	vm_offset_t end;
-	vm_offset_t va;
 	caddr_t kmdp;
 	u_int clock;
 	char *env;
@@ -339,10 +338,8 @@ sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
 	cpu_setregs(pc);
 
 	/*
-	 * Map and initialize the message buffer (after setting trap table).
+	 * Initialize the message buffer (after setting trap table).
 	 */
-	va = (vm_offset_t)msgbufp;
-	pmap_map(&va, msgbuf_phys, msgbuf_phys + MSGBUF_SIZE, 0);
 	msgbufinit(msgbufp, MSGBUF_SIZE);
 
 	mutex_init();
diff --git a/sys/sparc64/sparc64/pmap.c b/sys/sparc64/sparc64/pmap.c
index b9945ec..ab93da5 100644
--- a/sys/sparc64/sparc64/pmap.c
+++ b/sys/sparc64/sparc64/pmap.c
@@ -145,8 +145,6 @@ vm_offset_t kernel_vm_end;
 
 vm_offset_t vm_max_kernel_address;
 
-static vm_offset_t crashdumpmap;
-
 /*
  * Kernel pmap.
  */
@@ -328,9 +326,10 @@ pmap_bootstrap(vm_offset_t ekva)
 	bzero(tsb_kernel, tsb_kernel_size);
 
 	/*
-	 * Allocate the message buffer.
+	 * Allocate and map the message buffer.
 	 */
 	msgbuf_phys = pmap_bootstrap_alloc(MSGBUF_SIZE);
+	msgbufp = (struct msgbuf *)TLB_PHYS_TO_DIRECT(msgbuf_phys);
 
 	/*
 	 * Patch the virtual address and the tsb mask into the trap table.
@@ -397,18 +396,6 @@ pmap_bootstrap(vm_offset_t ekva)
 	virtual_avail += PAGE_SIZE * DCACHE_COLORS;
 
 	/*
-	 * Allocate virtual address space for the message buffer.
-	 */
-	msgbufp = (struct msgbuf *)virtual_avail;
-	virtual_avail += round_page(MSGBUF_SIZE);
-
-	/*
-	 * Allocate virtual address space to map pages during a kernel dump.
-	 */
-	crashdumpmap = virtual_avail;
-	virtual_avail += MAXDUMPPGS * PAGE_SIZE;
-
-	/*
 	 * Allocate a kernel stack with guard page for thread0 and map it into
 	 * the kernel tsb.
 	 */
@@ -838,25 +825,6 @@ pmap_kenter_flags(vm_offset_t va, vm_offset_t pa, u_long flags)
 }
 
 /*
- * Make a temporary mapping for a physical address.  This is only intended
- * to be used for panic dumps. Caching issues can be ignored completely here,
- * because pages mapped this way are only read.
- */
-void *
-pmap_kenter_temporary(vm_offset_t pa, int i)
-{
-	struct tte *tp;
-	vm_offset_t va;
-
-	va = crashdumpmap + i * PAGE_SIZE;
-	tlb_page_demap(kernel_pmap, va);
-	tp = tsb_kvtotte(va);
-	tp->tte_vpn = TV_VPN(va, TS_8K);
-	tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_REF | TD_CP | TD_CV | TD_P;
-	return ((void *)crashdumpmap);
-}
-
-/*
  * Remove a wired page from kernel virtual address space.
  */
 void
@@ -897,25 +865,10 @@ pmap_kremove_flags(vm_offset_t va)
  * unchanged.
  */
 vm_offset_t
-pmap_map(vm_offset_t *virt, vm_offset_t pa_start, vm_offset_t pa_end, int prot)
+pmap_map(vm_offset_t *virt, vm_offset_t start, vm_offset_t end, int prot)
 {
-	struct tte *tp;
-	vm_offset_t sva;
-	vm_offset_t va;
-	vm_offset_t pa;
 
-	pa = pa_start;
-	sva = *virt;
-	va = sva;
-	for (; pa < pa_end; pa += PAGE_SIZE, va += PAGE_SIZE) {
-		tp = tsb_kvtotte(va);
-		tp->tte_vpn = TV_VPN(va, TS_8K);
-		tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_REF | TD_SW |
-		    TD_CP | TD_CV | TD_P | TD_W;
-	}
-	tlb_range_demap(kernel_pmap, sva, sva + (pa_end - pa_start) - 1);
-	*virt = va;
-	return (sva);
+	return (TLB_PHYS_TO_DIRECT(start));
 }
 
 /*