diff options
Diffstat (limited to 'arch/arm64/include/asm/memory.h')
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 6486b2bfd562..f800d45ea226 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -33,6 +33,12 @@ #define UL(x) _AC(x, UL) /* + * Size of the PCI I/O space. This must remain a power of two so that + * IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses. + */ +#define PCI_IO_SIZE SZ_16M + +/* * PAGE_OFFSET - the virtual address of the start of the kernel image (top * (VA_BITS - 1)) * VA_BITS - the maximum number of bits for virtual addresses. @@ -45,7 +51,9 @@ #define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1)) #define MODULES_END (PAGE_OFFSET) #define MODULES_VADDR (MODULES_END - SZ_64M) -#define FIXADDR_TOP (MODULES_VADDR - SZ_2M - PAGE_SIZE) +#define PCI_IO_END (MODULES_VADDR - SZ_2M) +#define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) +#define FIXADDR_TOP (PCI_IO_START - SZ_2M) #define TASK_SIZE_64 (UL(1) << VA_BITS) #ifdef CONFIG_COMPAT |