arch/tile: complete migration to new kmap_atomic scheme

This change makes KM_TYPE_NR independent of the actual deprecated
list of km_type values, which are no longer used in tile code anywhere.
For now we leave it set to 8, allowing that many nested mappings,
and thus reserving 32MB of address space.

A few remaining places using KM_* values were cleaned up as well.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/arch/tile/lib/memcpy_tile64.c b/arch/tile/lib/memcpy_tile64.c
index dfedea7..f7d4a6a 100644
--- a/arch/tile/lib/memcpy_tile64.c
+++ b/arch/tile/lib/memcpy_tile64.c
@@ -54,7 +54,7 @@ typedef unsigned long (*memcpy_t)(void *, const void *, unsigned long);
  * we must run with interrupts disabled to avoid the risk of some
  * other code seeing the incoherent data in our cache.  (Recall that
  * our cache is indexed by PA, so even if the other code doesn't use
- * our KM_MEMCPY virtual addresses, they'll still hit in cache using
+ * our kmap_atomic virtual addresses, they'll still hit in cache using
  * the normal VAs that aren't supposed to hit in cache.)
  */
 static void memcpy_multicache(void *dest, const void *source,
@@ -64,6 +64,7 @@ static void memcpy_multicache(void *dest, const void *source,
 	unsigned long flags, newsrc, newdst;
 	pmd_t *pmdp;
 	pte_t *ptep;
+	int type0, type1;
 	int cpu = get_cpu();
 
 	/*
@@ -77,7 +78,8 @@ static void memcpy_multicache(void *dest, const void *source,
 	sim_allow_multiple_caching(1);
 
 	/* Set up the new dest mapping */
-	idx = FIX_KMAP_BEGIN + (KM_TYPE_NR * cpu) + KM_MEMCPY0;
+	type0 = kmap_atomic_idx_push();
+	idx = FIX_KMAP_BEGIN + (KM_TYPE_NR * cpu) + type0;
 	newdst = __fix_to_virt(idx) + ((unsigned long)dest & (PAGE_SIZE-1));
 	pmdp = pmd_offset(pud_offset(pgd_offset_k(newdst), newdst), newdst);
 	ptep = pte_offset_kernel(pmdp, newdst);
@@ -87,7 +89,8 @@ static void memcpy_multicache(void *dest, const void *source,
 	}
 
 	/* Set up the new source mapping */
-	idx += (KM_MEMCPY0 - KM_MEMCPY1);
+	type1 = kmap_atomic_idx_push();
+	idx += (type0 - type1);
 	src_pte = hv_pte_set_nc(src_pte);
 	src_pte = hv_pte_clear_writable(src_pte);  /* be paranoid */
 	newsrc = __fix_to_virt(idx) + ((unsigned long)source & (PAGE_SIZE-1));
@@ -119,6 +122,8 @@ static void memcpy_multicache(void *dest, const void *source,
 	 * We're done: notify the simulator that all is back to normal,
 	 * and re-enable interrupts and pre-emption.
 	 */
+	kmap_atomic_idx_pop();
+	kmap_atomic_idx_pop();
 	sim_allow_multiple_caching(0);
 	local_irq_restore(flags);
 	put_cpu();