patch-2.3.17 linux/include/asm-m68k/sun3mmu.h

• Lines: 168
• Date: Sat Sep 4 13:06:41 1999
• Orig file: v2.3.16/linux/include/asm-m68k/sun3mmu.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.16/linux/include/asm-m68k/sun3mmu.h linux/include/asm-m68k/sun3mmu.h
@@ -0,0 +1,167 @@
+/*
+ * Definitions for Sun3 custom MMU.
+ */
+#include <asm/movs.h>
+
+#ifndef __SUN3_MMU_H__
+#define __SUN3_MMU_H__
+
+#define FC_CONTROL 3
+
+/* MMU characteristics. */
+#define SUN3_SEGMAPS_PER_CONTEXT	2048
+#define SUN3_PMEGS_NUM			256
+#define SUN3_CONTEXTS_NUM               8
+
+#define SUN3_PMEG_SIZE_BITS	 17
+#define SUN3_PMEG_SIZE		 (1 << SUN3_PMEG_SIZE_BITS)
+#define SUN3_PMEG_MASK		 (SUN3_PMEG_SIZE - 1)
+
+#define SUN3_PTE_SIZE_BITS       13
+#define SUN3_PTE_SIZE		 (1 << SUN3_PTE_SIZE_BITS)
+#define SUN3_PTE_MASK		 (SUN3_PTE_SIZE - 1)
+
+#define SUN3_CONTROL_MASK       (0x0FFFFFFC)
+#define SUN3_INVALID_PMEG	255
+#define SUN3_INVALID_CONTEXT 255
+
+#define AC_IDPROM     0x00000000    /* 34  ID PROM, R/O, byte, 32 bytes      */
+#define AC_PAGEMAP    0x10000000    /* 3   Pagemap R/W, long                 */
+#define AC_SEGMAP     0x20000000    /* 3   Segment map, byte                 */
+#define AC_CONTEXT    0x30000000    /* 34c current mmu-context               */
+#define AC_SENABLE    0x40000000    /* 34c system dvma/cache/reset enable reg*/
+#define AC_UDVMA_ENB  0x50000000    /* 34  Not used on Sun boards, byte      */
+#define AC_BUS_ERROR  0x60000000    /* 34  Cleared on read, byte.            */
+#define AC_SYNC_ERR   0x60000000    /*   c fault type                        */
+#define AC_SYNC_VA    0x60000004    /*   c fault virtual address             */
+#define AC_ASYNC_ERR  0x60000008    /*   c asynchronous fault type           */
+#define AC_ASYNC_VA   0x6000000c    /*   c async fault virtual address       */
+#define AC_LEDS       0x70000000    /* 34  Zero turns on LEDs, byte          */
+#define AC_CACHETAGS  0x80000000    /* 34c direct access to the VAC tags     */
+#define AC_CACHEDDATA 0x90000000    /* 3 c direct access to the VAC data     */
+#define AC_UDVMA_MAP  0xD0000000    /* 4   Not used on Sun boards, byte      */
+#define AC_VME_VECTOR 0xE0000000    /* 4   For non-Autovector VME, byte      */
+#define AC_BOOT_SCC   0xF0000000    /* 34  bypass to access Zilog 8530. byte.*/
+
+#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
+			    | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)
+
+/* Bus access type within PTE. */
+#define SUN3_PAGE_TYPE_MASK   (0x0c000000)
+#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
+#define SUN3_PAGE_TYPE_IO     (0x04000000)
+#define SUN3_PAGE_TYPE_VME16  (0x08000000)
+#define SUN3_PAGE_TYPE_VME32  (0x0c000000)
+
+/* Mask for page number within PTE. */
+#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
+
+/* Bits within bus-error register. */
+#define SUN3_BUSERR_WATCHDOG	(0x01)
+#define SUN3_BUSERR_unused	(0x02)
+#define SUN3_BUSERR_FPAENERR	(0x04)
+#define SUN3_BUSERR_FPABERR	(0x08)
+#define SUN3_BUSERR_VMEBERR	(0x10)
+#define SUN3_BUSERR_TIMEOUT	(0x20)
+#define SUN3_BUSERR_PROTERR	(0x40)
+#define SUN3_BUSERR_INVALID	(0x80)
+
+#ifndef __ASSEMBLY__
+
+/* Read bus error status register (implicitly clearing it). */
+extern __inline__ unsigned char sun3_get_buserr (void)
+{
+	unsigned char sfc, c;
+
+	GET_SFC (sfc);
+	SET_SFC (FC_CONTROL);
+	GET_CONTROL_BYTE (AC_BUS_ERROR, c);
+	SET_SFC (sfc);
+
+	return c;
+}
+
+/* Read segmap from hardware MMU. */
+extern __inline__ unsigned long sun3_get_segmap (unsigned long addr)
+{
+        register unsigned long entry;
+        unsigned char c, sfc;
+
+        GET_SFC (sfc);
+        SET_SFC (FC_CONTROL);
+        GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
+        SET_SFC (sfc);
+        entry = c;
+
+        return entry;
+}
+
+/* Write segmap to hardware MMU. */
+extern __inline__ void sun3_put_segmap (unsigned long addr, unsigned long entry)
+{
+        unsigned char sfc;
+
+        GET_DFC (sfc);
+        SET_DFC (FC_CONTROL);
+        SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
+	SET_DFC (sfc);
+
+        return;
+}
+
+/* Read PTE from hardware MMU. */
+extern __inline__ unsigned long sun3_get_pte (unsigned long addr)
+{
+        register unsigned long entry;
+        unsigned char sfc;
+
+        GET_SFC (sfc);
+        SET_SFC (FC_CONTROL);
+        GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
+        SET_SFC (sfc);
+
+        return entry;
+}
+
+/* Write PTE to hardware MMU. */
+extern __inline__ void sun3_put_pte (unsigned long addr, unsigned long entry)
+{
+        unsigned char sfc;
+
+        GET_DFC (sfc);
+        SET_DFC (FC_CONTROL);
+        SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
+	SET_DFC (sfc);
+
+        return;
+}
+
+/* get current context */
+extern __inline__ unsigned char sun3_get_context(void)
+{
+	unsigned char sfc, c;
+
+	GET_SFC(sfc);
+	SET_SFC(FC_CONTROL);
+	GET_CONTROL_BYTE(AC_CONTEXT, c);
+	SET_SFC(sfc);
+	
+	return c;
+}
+
+/* set alternate context */
+extern __inline__ void sun3_put_context(unsigned char c)
+{
+	unsigned char dfc;
+	GET_DFC(dfc);
+	SET_DFC(FC_CONTROL);
+	SET_CONTROL_BYTE(AC_CONTEXT, c);
+	SET_DFC(dfc);
+	
+	return;
+}
+
+
+#endif	/* !__ASSEMBLY__ */
+
+#endif	/* !__SUN3_MMU_H__ */