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Diffstat (limited to 'arch/arm64/include/asm/memory.h')
-rw-r--r--arch/arm64/include/asm/memory.h10
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