MFC r257669, r257672, r257673, r257676, r257678:

  Call initarm_lastaddr() later in the init sequence, after establishing
  static device mappings, rather than as the first of the initializations
  that a platform can hook into.  This allows a platform to allocate KVA
  from the top of the address space downwards for things like static device
  mapping, and return the final "last usable address" result after that and
  other early init work is done.

  Because some platforms were doing work in initarm_lastaddr() that needs to
  be done early, add a new initarm_early_init() routine and move the early
  init code to that routine on those platforms.

  Make PTE_DEVICE a synonym for PTE_NOCACHE on armv4, to make it easier to
  share the same code on both architectures.

  Add new helper routines for arm static device mapping.  The new code
  allocates kva space from the top down for the device mappings and builds
  entries in an internal table which is automatically used later by
  arm_devmap_bootstrap().  The platform code just calls the new
  arm_devmap_add_entry() function as many times as it needs to (up to 32
  entries allowed; most platforms use 2 or 3 at most).

  Remove imx local devmap code and use the essentially identical common
  code that got moved from imx_machdep.c to arm/devmap.c.

1 files changed, 8 insertions, 3 deletions

diff --git a/sys/arm/tegra/tegra2_machdep.c b/sys/arm/tegra/tegra2_machdep.c
index 92ca04a..8904250 100644
--- a/sys/arm/tegra/tegra2_machdep.c
+++ b/sys/arm/tegra/tegra2_machdep.c
@@ -107,10 +107,15 @@ vm_offset_t
 initarm_lastaddr(void)
 {
 
+	return (fdt_immr_va);
+}
+
+void
+initarm_early_init(void)
+{
+
 	if (fdt_immr_addr(TEGRA2_BASE) != 0)				/* FIXME ???? */
 		while (1);
-
-	return (fdt_immr_va);
 }
 
 void
@@ -132,7 +137,7 @@ static struct arm_devmap_entry fdt_devmap[FDT_DEVMAP_MAX] = {
  * Construct pmap_devmap[] with DT-derived config data.
  */
 int
-platform_devmap_init(void)
+initarm_devmap_init(void)
 {
 	int i = 0;
 	fdt_devmap[i].pd_va = 0xe0000000;