Permit the app to read the storage

2020-04-29 13:50:42 +02:00
parent 892f950cc1
commit 88920035fa
1 changed files with 36 additions and 0 deletions
--- a/patches/tock/01-persistent-storage.patch
+++ b/patches/tock/01-persistent-storage.patch
@@ -277,3 +277,39 @@ index 5abd2d84..5a726fdb 100644
 +        }
 +    }
 +}
+diff --git a/kernel/src/process.rs b/kernel/src/process.rs
+index eb00f274..35c19d15 100644
+--- a/kernel/src/process.rs
+++ b/kernel/src/process.rs
+@@ -1604,6 +1604,31 @@ impl<C: 'static + Chip> Process<'a, C> {
+             return Ok((None, 0));
+         }
+ 
+        // Allocate MPU region for storage.
+        const STORAGE_PTR: usize = 0xc0000;
+        const STORAGE_LEN: usize = 0x40000;
+        if chip
+            .mpu()
+            .allocate_region(
+                STORAGE_PTR as *const u8,
+                STORAGE_LEN,
+                STORAGE_LEN,
+                mpu::Permissions::ReadOnly,
+                &mut mpu_config,
+            )
+            .is_none()
+        {
+            if config::CONFIG.debug_load_processes {
+                debug!(
+                    "[!] flash=[{:#010X}:{:#010X}] process={:?} - couldn't allocate flash region",
+                    STORAGE_PTR,
+                    STORAGE_PTR + STORAGE_LEN,
+                    process_name
+                );
+            }
+            return Ok((None, 0));
+        }
+
+         // Determine how much space we need in the application's
+         // memory space just for kernel and grant state. We need to make
+         // sure we allocate enough memory just for that.