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- /* iommu.h: Definitions for the sun5 IOMMU.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef _SPARC64_IOMMU_H
- #define _SPARC64_IOMMU_H
-
- #include <asm/page.h>
- #include <asm/sysio.h>
- #include <asm/spinlock.h>
-
- /* The iommu handles all virtual to physical address translations
- * that occur between the SYSIO and physical memory. Access by
- * the cpu to IO registers and similar go over the UPA so are
- * translated by the on chip TLB's. The iommu and the TLB do
- * not need to have the same translations at all, in fact most
- * of the time the translations they handle are a disjoint set.
- * Basically the iommu handles all SYSIO dvma translations.
- */
-
- /* The IOMMU register set. */
- #define IOMMU_CTRL_IMPL 0xf000000000000000 /* Implementation */
- #define IOMMU_CTRL_VERS 0x0f00000000000000 /* Version */
- #define IOMMU_CTRL_TSBSZ 0x0000000000070000 /* TSB Size */
- #define IOMMU_TSBSZ_1K 0x0000000000000000 /* TSB Table 1024 8-byte entries */
- #define IOMMU_TSBSZ_2K 0x0000000000010000 /* TSB Table 2048 8-byte entries */
- #define IOMMU_TSBSZ_4K 0x0000000000020000 /* TSB Table 4096 8-byte entries */
- #define IOMMU_TSBSZ_8K 0x0000000000030000 /* TSB Table 8192 8-byte entries */
- #define IOMMU_TSBSZ_16K 0x0000000000040000 /* TSB Table 16k 8-byte entries */
- #define IOMMU_TSBSZ_32K 0x0000000000050000 /* TSB Table 32k 8-byte entries */
- #define IOMMU_TSBSZ_64K 0x0000000000060000 /* TSB Table 64k 8-byte entries */
- #define IOMMU_TSBSZ_128K 0x0000000000070000 /* TSB Table 128k 8-byte entries */
- #define IOMMU_CTRL_TBWSZ 0x0000000000000004 /* Assumed page size, 0=8k 1=64k */
- #define IOMMU_CTRL_DENAB 0x0000000000000002 /* Diagnostic mode enable */
- #define IOMMU_CTRL_ENAB 0x0000000000000001 /* IOMMU Enable */
-
- /* The format of an iopte in the page tables, we only use 64k pages. */
- #define IOPTE_VALID 0x8000000000000000 /* IOPTE is valid */
- #define IOPTE_64K 0x2000000000000000 /* IOPTE is for 64k page */
- #define IOPTE_STBUF 0x1000000000000000 /* DVMA can use streaming buffer */
- #define IOPTE_INTRA 0x0800000000000000 /* SBUS slot-->slot direct transfer */
- #define IOPTE_PAGE 0x000001ffffffe000 /* Physical page number (PA[40:13]) */
- #define IOPTE_CACHE 0x0000000000000010 /* Cached (in UPA E-cache) */
- #define IOPTE_WRITE 0x0000000000000002 /* Writeable */
-
- struct iommu_struct {
- struct sysio_regs *sysio_regs;
- iopte_t *page_table;
- volatile unsigned int flushflag;
- unsigned int strbuf_enabled;
- spinlock_t iommu_lock;
- };
-
- #endif /* !(_SPARC_IOMMU_H) */
-