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Commit e3978cde authored by Catalin Marinas's avatar Catalin Marinas
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arm64: Move PCI_IOBASE closer to MODULES_VADDR 



This is to reuse the same pmd table that is sparsely populated with
the modules space.

Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 489f781a

Documentation/arm64/memory.txt

+6 −6
Original line number Diff line number Diff line
@@ -27,17 +27,17 @@ Start End Size Use 
-----------------------------------------------------------------------

0000000000000000	0000007fffffffff	 512GB		user



ffffff8000000000	ffffffbbfffcffff	~240GB		vmalloc

ffffff8000000000	ffffffbbfffeffff	~240GB		vmalloc



ffffffbbfffd0000	ffffffbcfffdffff	  64KB		[guard page]

ffffffbbffff0000	ffffffbbffffffff	  64KB		[guard page]



ffffffbbfffe0000	ffffffbcfffeffff	  64KB		PCI I/O space

ffffffbc00000000	ffffffbdffffffff	   8GB		vmemmap



ffffffbbffff0000	ffffffbcffffffff	  64KB		[guard page]

ffffffbe00000000	ffffffbffbbfffff	  ~8GB		[guard, future vmmemap]



ffffffbc00000000	ffffffbdffffffff	   8GB		vmemmap

ffffffbffbe00000	ffffffbffbe0ffff	  64KB		PCI I/O space



ffffffbe00000000	ffffffbffbffffff	  ~8GB		[guard, future vmmemap]

ffffffbbffff0000	ffffffbcffffffff	  ~2MB		[guard]



ffffffbffc000000	ffffffbfffffffff	  64MB		modules

arch/arm64/include/asm/io.h

+1 −1
Original line number Diff line number Diff line
@@ -114,7 +114,7 @@ static inline u64 __raw_readq(const volatile void __iomem *addr) 
 *  I/O port access primitives.

 */

#define IO_SPACE_LIMIT		0xffff

#define PCI_IOBASE		((void __iomem *)0xffffffbbfffe0000UL)

#define PCI_IOBASE		((void __iomem *)(MODULES_VADDR - SZ_2M))



static inline u8 inb(unsigned long addr)

{