diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-04-17 18:29:13 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 23:12:39 +1000 |
| commit | a35a3c6f60657812366fca86a9ce71df1b8f7aff (patch) | |
| tree | 65add16dc7417ce679c2a79c9dba00f0c2b5b341 /arch/powerpc/include/asm/book3s/64/pgtable.h | |
| parent | ef629cc5bf0543eb57d6e344ba776880ac35fd00 (diff) | |
powerpc/mm/hash64: Add a variable to track the end of IO mapping
This makes it easy to update the region mapping in the later patch
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index e3d18b3f6e5d..f8ab18f77d1b 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -277,9 +277,12 @@ extern unsigned long __vmalloc_end; extern unsigned long __kernel_virt_start; extern unsigned long __kernel_virt_size; extern unsigned long __kernel_io_start; +extern unsigned long __kernel_io_end; #define KERN_VIRT_START __kernel_virt_start #define KERN_VIRT_SIZE __kernel_virt_size #define KERN_IO_START __kernel_io_start +#define KERN_IO_END __kernel_io_end + extern struct page *vmemmap; extern unsigned long ioremap_bot; extern unsigned long pci_io_base; @@ -296,8 +299,7 @@ extern unsigned long pci_io_base; #include <asm/barrier.h> /* - * The second half of the kernel virtual space is used for IO mappings, - * it's itself carved into the PIO region (ISA and PHB IO space) and + * IO space itself carved into the PIO region (ISA and PHB IO space) and * the ioremap space * * ISA_IO_BASE = KERN_IO_START, 64K reserved area @@ -310,7 +312,7 @@ extern unsigned long pci_io_base; #define PHB_IO_BASE (ISA_IO_END) #define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE) #define IOREMAP_BASE (PHB_IO_END) -#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE) +#define IOREMAP_END (KERN_IO_END) /* Advertise special mapping type for AGP */ #define HAVE_PAGE_AGP |