diff options
Diffstat (limited to 'arch/arm64/kernel/head.S')
| -rw-r--r-- | arch/arm64/kernel/head.S | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index f1497f7b4da0..8283ff848328 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -83,6 +83,7 @@ * * Register Scope Purpose * x21 primary_entry() .. start_kernel() FDT pointer passed at boot in x0 + * x22 create_idmap() .. start_kernel() ID map VA of the DT blob * x23 primary_entry() .. start_kernel() physical misalignment/KASLR offset * x28 clear_page_tables() callee preserved temp register * x19/x20 __primary_switch() callee preserved temp registers @@ -348,7 +349,7 @@ SYM_FUNC_START_LOCAL(create_idmap) #endif adrp x0, init_idmap_pg_dir adrp x3, _text - adrp x6, _end + adrp x6, _end + MAX_FDT_SIZE + SWAPPER_BLOCK_SIZE mov x7, SWAPPER_RX_MMUFLAGS map_memory x0, x1, x3, x6, x7, x3, IDMAP_PGD_ORDER, x10, x11, x12, x13, x14, EXTRA_SHIFT @@ -362,6 +363,17 @@ SYM_FUNC_START_LOCAL(create_idmap) mov x6, #SWAPPER_BLOCK_SHIFT bl remap_region + /* Remap the FDT after the kernel image */ + adrp x1, _text + adrp x22, _end + SWAPPER_BLOCK_SIZE + bic x2, x22, #SWAPPER_BLOCK_SIZE - 1 + bfi x22, x21, #0, #SWAPPER_BLOCK_SHIFT // remapped FDT address + add x3, x2, #MAX_FDT_SIZE + SWAPPER_BLOCK_SIZE + bic x4, x21, #SWAPPER_BLOCK_SIZE - 1 + mov x5, SWAPPER_RW_MMUFLAGS + mov x6, #SWAPPER_BLOCK_SHIFT + bl remap_region + /* * Since the page tables have been populated with non-cacheable * accesses (MMU disabled), invalidate those tables again to |