diff options
Diffstat (limited to 'include/asm-cris/arch-v10/mmu.h')
| -rw-r--r-- | include/asm-cris/arch-v10/mmu.h | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/include/asm-cris/arch-v10/mmu.h b/include/asm-cris/arch-v10/mmu.h deleted file mode 100644 index df84f17..0000000 --- a/include/asm-cris/arch-v10/mmu.h +++ /dev/null @@ -1,109 +0,0 @@ -/* - * CRIS MMU constants and PTE layout - */ - -#ifndef _CRIS_ARCH_MMU_H -#define _CRIS_ARCH_MMU_H - -/* type used in struct mm to couple an MMU context to an active mm */ - -typedef struct -{ - unsigned int page_id; -} mm_context_t; - -/* kernel memory segments */ - -#define KSEG_F 0xf0000000UL -#define KSEG_E 0xe0000000UL -#define KSEG_D 0xd0000000UL -#define KSEG_C 0xc0000000UL -#define KSEG_B 0xb0000000UL -#define KSEG_A 0xa0000000UL -#define KSEG_9 0x90000000UL -#define KSEG_8 0x80000000UL -#define KSEG_7 0x70000000UL -#define KSEG_6 0x60000000UL -#define KSEG_5 0x50000000UL -#define KSEG_4 0x40000000UL -#define KSEG_3 0x30000000UL -#define KSEG_2 0x20000000UL -#define KSEG_1 0x10000000UL -#define KSEG_0 0x00000000UL - -/* CRIS PTE bits (see R_TLB_LO in the register description) - * - * Bit: 31-13 12-------4 3 2 1 0 - * ________________________________________________ - * | pfn | reserved | global | valid | kernel | we | - * |_____|__________|________|_______|________|_____| - * - * (pfn = physical frame number) - */ - -/* Real HW-based PTE bits. We use some synonym names so that - * things become less confusing in combination with the SW-based - * bits further below. - * - */ - -#define _PAGE_WE (1<<0) /* page is write-enabled */ -#define _PAGE_SILENT_WRITE (1<<0) /* synonym */ -#define _PAGE_KERNEL (1<<1) /* page is kernel only */ -#define _PAGE_VALID (1<<2) /* page is valid */ -#define _PAGE_SILENT_READ (1<<2) /* synonym */ -#define _PAGE_GLOBAL (1<<3) /* global page - context is ignored */ - -/* Bits the HW doesn't care about but the kernel uses them in SW */ - -#define _PAGE_PRESENT (1<<4) /* page present in memory */ -#define _PAGE_FILE (1<<5) /* set: pagecache, unset: swap (when !PRESENT) */ -#define _PAGE_ACCESSED (1<<5) /* simulated in software using valid bit */ -#define _PAGE_MODIFIED (1<<6) /* simulated in software using we bit */ -#define _PAGE_READ (1<<7) /* read-enabled */ -#define _PAGE_WRITE (1<<8) /* write-enabled */ - -/* Define some higher level generic page attributes. */ - -#define __READABLE (_PAGE_READ | _PAGE_SILENT_READ | _PAGE_ACCESSED) -#define __WRITEABLE (_PAGE_WRITE | _PAGE_SILENT_WRITE | _PAGE_MODIFIED) - -#define _PAGE_TABLE (_PAGE_PRESENT | __READABLE | __WRITEABLE) -#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED) - -#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED) -#define PAGE_SHARED __pgprot(_PAGE_PRESENT | __READABLE | _PAGE_WRITE | \ - _PAGE_ACCESSED) -#define PAGE_COPY __pgprot(_PAGE_PRESENT | __READABLE) // | _PAGE_COW -#define PAGE_READONLY __pgprot(_PAGE_PRESENT | __READABLE) -#define PAGE_KERNEL __pgprot(_PAGE_GLOBAL | _PAGE_KERNEL | \ - _PAGE_PRESENT | __READABLE | __WRITEABLE) -#define _KERNPG_TABLE (_PAGE_TABLE | _PAGE_KERNEL) - -/* - * CRIS can't do page protection for execute, and considers read the same. - * Also, write permissions imply read permissions. This is the closest we can - * get.. - */ - -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED - -#define PTE_FILE_MAX_BITS 26 - -#endif |
