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authorDavid Gibson <david@gibson.dropbear.id.au>2005-06-21 17:15:31 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-21 18:46:26 -0700
commit20cee16ced631f70a62c97bdebae08a1c9470448 (patch)
treef980db4e2b19dfcd4413e6cba4f667eb1d8c79cd /include/asm-ppc64
parent6879dc137ea4efad65cab8bf8a7c0b742bcf92cc (diff)
[PATCH] ppc64: Abolish ioremap_mm
Currently ppc64 has two mm_structs for the kernel, init_mm and also ioremap_mm. The latter really isn't necessary: this patch abolishes it, instead restricting vmallocs to the lower 1TB of the init_mm's range and placing io mappings in the upper 1TB. This simplifies the code in a number of places and eliminates an unecessary set of pagetables. It also tweaks the unmap/free path a little, allowing us to remove the unmap_im_area() set of page table walkers, replacing them with unmap_vm_area(). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-ppc64')
-rw-r--r--include/asm-ppc64/imalloc.h12
-rw-r--r--include/asm-ppc64/page.h2
-rw-r--r--include/asm-ppc64/pgtable.h9
-rw-r--r--include/asm-ppc64/processor.h10
4 files changed, 9 insertions, 24 deletions
diff --git a/include/asm-ppc64/imalloc.h b/include/asm-ppc64/imalloc.h
index 3a45e918bf1..e46ff68a6e4 100644
--- a/include/asm-ppc64/imalloc.h
+++ b/include/asm-ppc64/imalloc.h
@@ -4,9 +4,9 @@
/*
* Define the address range of the imalloc VM area.
*/
-#define PHBS_IO_BASE IOREGIONBASE
-#define IMALLOC_BASE (IOREGIONBASE + 0x80000000ul) /* Reserve 2 gigs for PHBs */
-#define IMALLOC_END (IOREGIONBASE + EADDR_MASK)
+#define PHBS_IO_BASE VMALLOC_END
+#define IMALLOC_BASE (PHBS_IO_BASE + 0x80000000ul) /* Reserve 2 gigs for PHBs */
+#define IMALLOC_END (VMALLOC_START + EADDR_MASK)
/* imalloc region types */
@@ -18,7 +18,9 @@
extern struct vm_struct * im_get_free_area(unsigned long size);
extern struct vm_struct * im_get_area(unsigned long v_addr, unsigned long size,
- int region_type);
-unsigned long im_free(void *addr);
+ int region_type);
+extern void im_free(void *addr);
+
+extern unsigned long ioremap_bot;
#endif /* _PPC64_IMALLOC_H */
diff --git a/include/asm-ppc64/page.h b/include/asm-ppc64/page.h
index bcd21789d3b..257d87eb7c3 100644
--- a/include/asm-ppc64/page.h
+++ b/include/asm-ppc64/page.h
@@ -202,9 +202,7 @@ extern u64 ppc64_pft_size; /* Log 2 of page table size */
#define PAGE_OFFSET ASM_CONST(0xC000000000000000)
#define KERNELBASE PAGE_OFFSET
#define VMALLOCBASE ASM_CONST(0xD000000000000000)
-#define IOREGIONBASE ASM_CONST(0xE000000000000000)
-#define IO_REGION_ID (IOREGIONBASE >> REGION_SHIFT)
#define VMALLOC_REGION_ID (VMALLOCBASE >> REGION_SHIFT)
#define KERNEL_REGION_ID (KERNELBASE >> REGION_SHIFT)
#define USER_REGION_ID (0UL)
diff --git a/include/asm-ppc64/pgtable.h b/include/asm-ppc64/pgtable.h
index 264c4f7993b..46cf61c2ff6 100644
--- a/include/asm-ppc64/pgtable.h
+++ b/include/asm-ppc64/pgtable.h
@@ -53,7 +53,8 @@
* Define the address range of the vmalloc VM area.
*/
#define VMALLOC_START (0xD000000000000000ul)
-#define VMALLOC_END (VMALLOC_START + EADDR_MASK)
+#define VMALLOC_SIZE (0x10000000000UL)
+#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
/*
* Bits in a linux-style PTE. These match the bits in the
@@ -239,9 +240,6 @@ static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
/* This now only contains the vmalloc pages */
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-/* to find an entry in the ioremap page-table-directory */
-#define pgd_offset_i(address) (ioremap_pgd + pgd_index(address))
-
/*
* The following only work if pte_present() is true.
* Undefined behaviour if not..
@@ -459,15 +457,12 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long addr,
#define __HAVE_ARCH_PTE_SAME
#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0)
-extern unsigned long ioremap_bot, ioremap_base;
-
#define pmd_ERROR(e) \
printk("%s:%d: bad pmd %08x.\n", __FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
printk("%s:%d: bad pgd %08x.\n", __FILE__, __LINE__, pgd_val(e))
extern pgd_t swapper_pg_dir[];
-extern pgd_t ioremap_dir[];
extern void paging_init(void);
diff --git a/include/asm-ppc64/processor.h b/include/asm-ppc64/processor.h
index 809c634ba1d..3084099086a 100644
--- a/include/asm-ppc64/processor.h
+++ b/include/asm-ppc64/processor.h
@@ -430,16 +430,6 @@ struct thread_struct {
}
/*
- * Note: the vm_start and vm_end fields here should *not*
- * be in kernel space. (Could vm_end == vm_start perhaps?)
- */
-#define IOREMAP_MMAP { &ioremap_mm, 0, 0x1000, NULL, \
- PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, \
- 1, NULL, NULL }
-
-extern struct mm_struct ioremap_mm;
-
-/*
* Return saved PC of a blocked thread. For now, this is the "user" PC
*/
#define thread_saved_pc(tsk) \