[Skiboot] [PATCH 2/7 v3] core: Introduce REGION_HW_RESERVED

[Jeremy Kerr]

This change allows the mem_region code to distinguish reserved memory
that was allocated before skiboot init, by introducing a new
mem_region_type member.

When we extract reserved ranges from the device tree, we mark them with
this new type.

Signed-off-by: Jeremy Kerr <jk at ozlabs.org>

---
 core/mem_region.c    |    2 +-
 include/mem_region.h |    5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/core/mem_region.c b/core/mem_region.c
index 4f73776..b3f7dc4 100644
--- a/core/mem_region.c
+++ b/core/mem_region.c
@@ -878,7 +878,7 @@ void mem_region_init(void)
 			region = new_region(name,
 					dt_get_number(range, 2),
 					dt_get_number(range + 1, 2),
-					NULL, REGION_RESERVED);
+					NULL, REGION_HW_RESERVED);
 			list_add(&regions, &region->list);
 		}
 	} else if (names || ranges) {
diff --git a/include/mem_region.h b/include/mem_region.h
index fefd6ba..1f25c9c 100644
--- a/include/mem_region.h
+++ b/include/mem_region.h
@@ -28,7 +28,10 @@ enum mem_region_type {
 	/* ranges used explicitly for skiboot, but not allocatable. eg .text */
 	REGION_SKIBOOT_FIRMWARE,
 
-	/* ranges reserved, possibly before skiboot init, eg HW framebuffer */
+	/* ranges reserved before skiboot init, eg HBRT memory */
+	REGION_HW_RESERVED,
+
+	/* ranges reserved, eg HW framebuffer */
 	REGION_RESERVED,
 
 	/* ranges available for the OS, created by mem_region_release_unused */