51533b615e
New CRIS sub architecture named v32. From: Dave Jones <davej@redhat.com> Fix swapped kmalloc args Signed-off-by: Mikael Starvik <starvik@axis.com> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
111 lines
4 KiB
C
111 lines
4 KiB
C
#ifndef _ASM_CRIS_ARCH_MMU_H
|
|
#define _ASM_CRIS_ARCH_MMU_H
|
|
|
|
/* MMU context type. */
|
|
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
|
|
|
|
/*
|
|
* CRISv32 PTE bits:
|
|
*
|
|
* Bit: 31-13 12-5 4 3 2 1 0
|
|
* +-----+------+--------+-------+--------+-------+---------+
|
|
* | pfn | zero | global | valid | kernel | write | execute |
|
|
* +-----+------+--------+-------+--------+-------+---------+
|
|
*/
|
|
|
|
/*
|
|
* Defines for accessing the bits. Also define some synonyms for use with
|
|
* the software-based defined bits below.
|
|
*/
|
|
#define _PAGE_EXECUTE (1 << 0) /* Execution bit. */
|
|
#define _PAGE_WE (1 << 1) /* Write bit. */
|
|
#define _PAGE_SILENT_WRITE (1 << 1) /* Same as above. */
|
|
#define _PAGE_KERNEL (1 << 2) /* Kernel mode page. */
|
|
#define _PAGE_VALID (1 << 3) /* Page is valid. */
|
|
#define _PAGE_SILENT_READ (1 << 3) /* Same as above. */
|
|
#define _PAGE_GLOBAL (1 << 4) /* Global page. */
|
|
|
|
/*
|
|
* The hardware doesn't care about these bits, but the kernel uses them in
|
|
* software.
|
|
*/
|
|
#define _PAGE_PRESENT (1 << 5) /* Page is present in memory. */
|
|
#define _PAGE_FILE (1 << 6) /* 1=pagecache, 0=swap (when !present) */
|
|
#define _PAGE_ACCESSED (1 << 6) /* Simulated in software using valid bit. */
|
|
#define _PAGE_MODIFIED (1 << 7) /* Simulated in software using we bit. */
|
|
#define _PAGE_READ (1 << 8) /* Read enabled. */
|
|
#define _PAGE_WRITE (1 << 9) /* 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_SHARED_EXEC __pgprot(_PAGE_PRESENT | __READABLE | _PAGE_WRITE | \
|
|
_PAGE_ACCESSED | _PAGE_EXECUTE)
|
|
|
|
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | __READABLE)
|
|
#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | __READABLE | _PAGE_EXECUTE | _PAGE_ACCESSED)
|
|
|
|
#define PAGE_COPY __pgprot(_PAGE_PRESENT | __READABLE)
|
|
#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | __READABLE | _PAGE_EXECUTE)
|
|
#define PAGE_KERNEL __pgprot(_PAGE_GLOBAL | _PAGE_KERNEL | \
|
|
_PAGE_PRESENT | __READABLE | __WRITEABLE)
|
|
#define PAGE_KERNEL_EXEC __pgprot(_PAGE_GLOBAL | _PAGE_KERNEL | _PAGE_EXECUTE | \
|
|
_PAGE_PRESENT | __READABLE | __WRITEABLE)
|
|
#define PAGE_SIGNAL_TRAMPOLINE __pgprot(_PAGE_GLOBAL | _PAGE_EXECUTE | \
|
|
_PAGE_PRESENT | __READABLE)
|
|
|
|
#define _KERNPG_TABLE (_PAGE_TABLE | _PAGE_KERNEL)
|
|
|
|
/* CRISv32 can do page protection for execute.
|
|
* Write permissions imply read permissions.
|
|
* Note that the numbers are in Execute-Write-Read order!
|
|
*/
|
|
#define __P000 PAGE_NONE
|
|
#define __P001 PAGE_READONLY
|
|
#define __P010 PAGE_COPY
|
|
#define __P011 PAGE_COPY
|
|
#define __P100 PAGE_READONLY_EXEC
|
|
#define __P101 PAGE_READONLY_EXEC
|
|
#define __P110 PAGE_COPY_EXEC
|
|
#define __P111 PAGE_COPY_EXEC
|
|
|
|
#define __S000 PAGE_NONE
|
|
#define __S001 PAGE_READONLY
|
|
#define __S010 PAGE_SHARED
|
|
#define __S011 PAGE_SHARED
|
|
#define __S100 PAGE_READONLY_EXEC
|
|
#define __S101 PAGE_READONLY_EXEC
|
|
#define __S110 PAGE_SHARED_EXEC
|
|
#define __S111 PAGE_SHARED_EXEC
|
|
|
|
#define PTE_FILE_MAX_BITS 25
|
|
|
|
#endif /* _ASM_CRIS_ARCH_MMU_H */
|