Add dynamic region support to xlat tables lib v2
Added APIs to add and remove regions to the translation tables
dynamically while the MMU is enabled. Only static regions are allowed
to overlap other static ones (for backwards compatibility).
A new private attribute (MT_DYNAMIC / MT_STATIC) has been added to
flag each region as such.
The dynamic mapping functionality can be enabled or disabled when
compiling by setting the build option PLAT_XLAT_TABLES_DYNAMIC to 1
or 0. This can be done per-image.
TLB maintenance code during dynamic table mapping and unmapping has
also been added.
Fixes ARM-software/tf-issues#310
Change-Id: I19e8992005c4292297a382824394490c5387aa3b
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/lib/xlat_tables_v2/xlat_tables_common.c b/lib/xlat_tables_v2/xlat_tables_common.c
index 0b17842..b4691a2 100644
--- a/lib/xlat_tables_v2/xlat_tables_common.c
+++ b/lib/xlat_tables_v2/xlat_tables_common.c
@@ -60,6 +60,10 @@
static mmap_region_t tf_mmap[MAX_MMAP_REGIONS + 1];
+#if PLAT_XLAT_TABLES_DYNAMIC
+static int xlat_tables_mapped_regions[MAX_XLAT_TABLES];
+#endif /* PLAT_XLAT_TABLES_DYNAMIC */
+
xlat_ctx_t tf_xlat_ctx = {
.pa_max_address = PLAT_PHY_ADDR_SPACE_SIZE - 1,
@@ -70,6 +74,9 @@
.tables = tf_xlat_tables,
.tables_num = MAX_XLAT_TABLES,
+#if PLAT_XLAT_TABLES_DYNAMIC
+ .tables_mapped_regions = xlat_tables_mapped_regions,
+#endif /* PLAT_XLAT_TABLES_DYNAMIC */
.base_table = tf_base_xlat_table,
.base_table_entries = NUM_BASE_LEVEL_ENTRIES,
@@ -104,6 +111,27 @@
}
}
+#if PLAT_XLAT_TABLES_DYNAMIC
+
+int mmap_add_dynamic_region(unsigned long long base_pa,
+ uintptr_t base_va, size_t size, unsigned int attr)
+{
+ mmap_region_t mm = {
+ .base_va = base_va,
+ .base_pa = base_pa,
+ .size = size,
+ .attr = attr,
+ };
+ return mmap_add_dynamic_region_ctx(&tf_xlat_ctx, &mm);
+}
+
+int mmap_remove_dynamic_region(uintptr_t base_va, size_t size)
+{
+ return mmap_remove_dynamic_region_ctx(&tf_xlat_ctx, base_va, size);
+}
+
+#endif /* PLAT_XLAT_TABLES_DYNAMIC */
+
void init_xlat_tables(void)
{
assert(!is_mmu_enabled());