[PATCH 13/13] lib: utils: Disable appropriate APLIC DT nodes in fdt_fixups()
Anup Patel
apatel at ventanamicro.com
Tue Jan 4 02:13:23 PST 2022
We should disable APLIC DT nodes in fdt_fixups() which are not
accessible to the next booting stage based on currently assigned
domain.
Signed-off-by: Anup Patel <anup.patel at wdc.com>
Signed-off-by: Anup Patel <apatel at ventanamicro.com>
---
include/sbi_utils/fdt/fdt_fixup.h | 18 +++++++++++++++---
lib/utils/fdt/fdt_fixup.c | 11 +++++++++++
2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/include/sbi_utils/fdt/fdt_fixup.h b/include/sbi_utils/fdt/fdt_fixup.h
index 77575bb..fb076ba 100644
--- a/include/sbi_utils/fdt/fdt_fixup.h
+++ b/include/sbi_utils/fdt/fdt_fixup.h
@@ -21,6 +21,18 @@
*/
void fdt_cpu_fixup(void *fdt);
+/**
+ * Fix up the APLIC nodes in the device tree
+ *
+ * This routine disables APLIC nodes which are not accessible to the next
+ * booting stage based on currently assigned domain.
+ *
+ * It is recommended that platform codes call this helper in their final_init()
+ *
+ * @param fdt: device tree blob
+ */
+void fdt_aplic_fixup(void *fdt);
+
/**
* Fix up the IMSIC nodes in the device tree
*
@@ -76,9 +88,9 @@ int fdt_reserved_memory_nomap_fixup(void *fdt);
* General device tree fix-up
*
* This routine do all required device tree fix-ups for a typical platform.
- * It fixes up the PLIC node, IMSIC nodes, and the reserved memory node in
- * the device tree by calling the corresponding helper routines to accomplish
- * the task.
+ * It fixes up the PLIC node, IMSIC nodes, APLIC nodes, and the reserved
+ * memory node in the device tree by calling the corresponding helper
+ * routines to accomplish the task.
*
* It is recommended that platform codes call this helper in their final_init()
*
diff --git a/lib/utils/fdt/fdt_fixup.c b/lib/utils/fdt/fdt_fixup.c
index c2460b8..a80bd82 100644
--- a/lib/utils/fdt/fdt_fixup.c
+++ b/lib/utils/fdt/fdt_fixup.c
@@ -71,6 +71,15 @@ static void fdt_domain_based_fixup_one(void *fdt, int nodeoff)
}
}
+void fdt_aplic_fixup(void *fdt)
+{
+ int noff = 0;
+
+ while ((noff = fdt_node_offset_by_compatible(fdt, noff,
+ "riscv,aplic")) >= 0)
+ fdt_domain_based_fixup_one(fdt, noff);
+}
+
void fdt_imsic_fixup(void *fdt)
{
int noff = 0;
@@ -289,6 +298,8 @@ int fdt_reserved_memory_nomap_fixup(void *fdt)
void fdt_fixups(void *fdt)
{
+ fdt_aplic_fixup(fdt);
+
fdt_imsic_fixup(fdt);
fdt_plic_fixup(fdt);
--
2.25.1
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