diff options
| -rw-r--r-- | bsps/aarch64/include/bsp/aarch64-mmu.h | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/bsps/aarch64/include/bsp/aarch64-mmu.h b/bsps/aarch64/include/bsp/aarch64-mmu.h index 1287c67016..ebc224b9e1 100644 --- a/bsps/aarch64/include/bsp/aarch64-mmu.h +++ b/bsps/aarch64/include/bsp/aarch64-mmu.h @@ -243,26 +243,29 @@ BSP_START_TEXT_SECTION static inline rtems_status_code aarch64_mmu_map_block( /* check for perfect block match */ if ( block_bottom == addr ) { if ( size >= chunk_size ) { - /* when page_flag is set the last level must be a page descriptor */ - if ( page_flag || ( page_table[index] & MMU_DESC_TYPE_TABLE ) != MMU_DESC_TYPE_TABLE ) { - /* no sub-table, apply block properties */ - page_table[index] = addr | flags | page_flag; - size -= chunk_size; - addr += chunk_size; - continue; + /* level -1 can't contain block descriptors, fall through to subtable */ + if ( level != -1 ) { + /* when page_flag is set the last level must be a page descriptor */ + if ( page_flag || ( page_table[index] & MMU_DESC_TYPE_TABLE ) != MMU_DESC_TYPE_TABLE ) { + /* no sub-table, apply block properties */ + page_table[index] = addr | flags | page_flag; + size -= chunk_size; + addr += chunk_size; + continue; + } } } else { /* block starts on a boundary, but is short */ chunk_size = size; - /* it isn't possible to go beyond page table level 2 */ - if ( page_flag ) { + /* it isn't possible to go beyond page table level 2 */ + if ( page_flag ) { /* no sub-table, apply block properties */ page_table[index] = addr | flags | page_flag; size -= chunk_size; addr += chunk_size; continue; - } + } } } else { uintptr_t block_top = RTEMS_ALIGN_UP( addr, granularity ); |