powerpc: Add memory management headers for new 64-bit BookE
This adds the PTE and pgtable format definitions, along with changes
to the kernel memory map and other definitions related to implementing
support for 64-bit Book3E. This also shields some asm-offset bits that
are currently only relevant on 32-bit
We also move the definition of the "linux" page size constants to
the common mmu.h file and add a few sizes that are relevant to
embedded processors.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h
index 8cd083c..7254c5a 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64.h
@@ -5,11 +5,6 @@
* the ppc64 hashed page table.
*/
-#ifndef __ASSEMBLY__
-#include <linux/stddef.h>
-#include <asm/tlbflush.h>
-#endif /* __ASSEMBLY__ */
-
#ifdef CONFIG_PPC_64K_PAGES
#include <asm/pgtable-ppc64-64k.h>
#else
@@ -38,26 +33,46 @@
#endif
/*
- * Define the address range of the vmalloc VM area.
+ * Define the address range of the kernel non-linear virtual area
*/
-#define VMALLOC_START ASM_CONST(0xD000000000000000)
-#define VMALLOC_SIZE (PGTABLE_RANGE >> 1)
-#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
+
+#ifdef CONFIG_PPC_BOOK3E
+#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
+#else
+#define KERN_VIRT_START ASM_CONST(0xD000000000000000)
+#endif
+#define KERN_VIRT_SIZE PGTABLE_RANGE
/*
- * Define the address ranges for MMIO and IO space :
+ * The vmalloc space starts at the beginning of that region, and
+ * occupies half of it on hash CPUs and a quarter of it on Book3E
+ */
+#define VMALLOC_START KERN_VIRT_START
+#ifdef CONFIG_PPC_BOOK3E
+#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2)
+#else
+#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1)
+#endif
+#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
+
+/*
+ * 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
+ * the ioremap space
*
- * ISA_IO_BASE = VMALLOC_END, 64K reserved area
+ * ISA_IO_BASE = KERN_IO_START, 64K reserved area
* PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces
* IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE
*/
+#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
#define FULL_IO_SIZE 0x80000000ul
-#define ISA_IO_BASE (VMALLOC_END)
-#define ISA_IO_END (VMALLOC_END + 0x10000ul)
+#define ISA_IO_BASE (KERN_IO_START)
+#define ISA_IO_END (KERN_IO_START + 0x10000ul)
#define PHB_IO_BASE (ISA_IO_END)
-#define PHB_IO_END (VMALLOC_END + FULL_IO_SIZE)
+#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
#define IOREMAP_BASE (PHB_IO_END)
-#define IOREMAP_END (VMALLOC_START + PGTABLE_RANGE)
+#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
+
/*
* Region IDs
@@ -72,19 +87,28 @@
#define USER_REGION_ID (0UL)
/*
- * Defines the address of the vmemap area, in its own region
+ * Defines the address of the vmemap area, in its own region on
+ * hash table CPUs and after the vmalloc space on Book3E
*/
+#ifdef CONFIG_PPC_BOOK3E
+#define VMEMMAP_BASE VMALLOC_END
+#define VMEMMAP_END KERN_IO_START
+#else
#define VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT)
+#endif
#define vmemmap ((struct page *)VMEMMAP_BASE)
/*
* Include the PTE bits definitions
*/
+#ifdef CONFIG_PPC_BOOK3S
#include <asm/pte-hash64.h>
+#else
+#include <asm/pte-book3e.h>
+#endif
#include <asm/pte-common.h>
-
#ifdef CONFIG_PPC_MM_SLICES
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
@@ -92,6 +116,9 @@
#ifndef __ASSEMBLY__
+#include <linux/stddef.h>
+#include <asm/tlbflush.h>
+
/*
* This is the default implementation of various PTE accessors, it's
* used in all cases except Book3S with 64K pages where we have a