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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 /* XXX what does this thing do? */
#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;
unsigned int *sbuf_flushflag_va;
unsigned long sbuf_flushflag_pa;
spinlock_t iommu_lock;
iopte_t *page_table;
/* For convenience */
unsigned long start; /* First managed virtual address */
unsigned long end; /* Last managed virtual address */
};
#endif /* !(_SPARC_IOMMU_H) */
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