Release 4.11 arch/sparc/include/asm/iommu_32.h
/* iommu.h: Definitions for the sun4m IOMMU.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC_IOMMU_H
#define _SPARC_IOMMU_H
#include <asm/page.h>
#include <asm/bitext.h>
/* The iommu handles all virtual to physical address translations
* that occur between the SBUS and physical memory. Access by
* the cpu to IO registers and similar go over the mbus so are
* translated by the on chip SRMMU. The iommu and the srmmu do
* not need to have the same translations at all, in fact most
* of the time the translations they handle are a disjunct set.
* Basically the iommu handles all dvma sbus activity.
*/
/* The IOMMU registers occupy three pages in IO space. */
struct iommu_regs {
/* First page */
volatile unsigned long control; /* IOMMU control */
volatile unsigned long base; /* Physical base of iopte page table */
volatile unsigned long _unused1[3];
volatile unsigned long tlbflush; /* write only */
volatile unsigned long pageflush; /* write only */
volatile unsigned long _unused2[1017];
/* Second page */
volatile unsigned long afsr; /* Async-fault status register */
volatile unsigned long afar; /* Async-fault physical address */
volatile unsigned long _unused3[2];
volatile unsigned long sbuscfg0; /* SBUS configuration registers, per-slot */
volatile unsigned long sbuscfg1;
volatile unsigned long sbuscfg2;
volatile unsigned long sbuscfg3;
volatile unsigned long mfsr; /* Memory-fault status register */
volatile unsigned long mfar; /* Memory-fault physical address */
volatile unsigned long _unused4[1014];
/* Third page */
volatile unsigned long mid; /* IOMMU module-id */
};
#define IOMMU_CTRL_IMPL 0xf0000000
/* Implementation */
#define IOMMU_CTRL_VERS 0x0f000000
/* Version */
#define IOMMU_CTRL_RNGE 0x0000001c
/* Mapping RANGE */
#define IOMMU_RNGE_16MB 0x00000000
/* 0xff000000 -> 0xffffffff */
#define IOMMU_RNGE_32MB 0x00000004
/* 0xfe000000 -> 0xffffffff */
#define IOMMU_RNGE_64MB 0x00000008
/* 0xfc000000 -> 0xffffffff */
#define IOMMU_RNGE_128MB 0x0000000c
/* 0xf8000000 -> 0xffffffff */
#define IOMMU_RNGE_256MB 0x00000010
/* 0xf0000000 -> 0xffffffff */
#define IOMMU_RNGE_512MB 0x00000014
/* 0xe0000000 -> 0xffffffff */
#define IOMMU_RNGE_1GB 0x00000018
/* 0xc0000000 -> 0xffffffff */
#define IOMMU_RNGE_2GB 0x0000001c
/* 0x80000000 -> 0xffffffff */
#define IOMMU_CTRL_ENAB 0x00000001
/* IOMMU Enable */
#define IOMMU_AFSR_ERR 0x80000000
/* LE, TO, or BE asserted */
#define IOMMU_AFSR_LE 0x40000000
/* SBUS reports error after transaction */
#define IOMMU_AFSR_TO 0x20000000
/* Write access took more than 12.8 us. */
#define IOMMU_AFSR_BE 0x10000000
/* Write access received error acknowledge */
#define IOMMU_AFSR_SIZE 0x0e000000
/* Size of transaction causing error */
#define IOMMU_AFSR_S 0x01000000
/* Sparc was in supervisor mode */
#define IOMMU_AFSR_RESV 0x00f00000
/* Reserver, forced to 0x8 by hardware */
#define IOMMU_AFSR_ME 0x00080000
/* Multiple errors occurred */
#define IOMMU_AFSR_RD 0x00040000
/* A read operation was in progress */
#define IOMMU_AFSR_FAV 0x00020000
/* IOMMU afar has valid contents */
#define IOMMU_SBCFG_SAB30 0x00010000
/* Phys-address bit 30 when bypass enabled */
#define IOMMU_SBCFG_BA16 0x00000004
/* Slave supports 16 byte bursts */
#define IOMMU_SBCFG_BA8 0x00000002
/* Slave supports 8 byte bursts */
#define IOMMU_SBCFG_BYPASS 0x00000001
/* Bypass IOMMU, treat all addresses
produced by this device as pure
physical. */
#define IOMMU_MFSR_ERR 0x80000000
/* One or more of PERR1 or PERR0 */
#define IOMMU_MFSR_S 0x01000000
/* Sparc was in supervisor mode */
#define IOMMU_MFSR_CPU 0x00800000
/* CPU transaction caused parity error */
#define IOMMU_MFSR_ME 0x00080000
/* Multiple parity errors occurred */
#define IOMMU_MFSR_PERR 0x00006000
/* high bit indicates parity error occurred
on the even word of the access, low bit
indicated odd word caused the parity error */
#define IOMMU_MFSR_BM 0x00001000
/* Error occurred while in boot mode */
#define IOMMU_MFSR_C 0x00000800
/* Address causing error was marked cacheable */
#define IOMMU_MFSR_RTYP 0x000000f0
/* Memory request transaction type */
#define IOMMU_MID_SBAE 0x001f0000
/* SBus arbitration enable */
#define IOMMU_MID_SE 0x00100000
/* Enables SCSI/ETHERNET arbitration */
#define IOMMU_MID_SB3 0x00080000
/* Enable SBUS device 3 arbitration */
#define IOMMU_MID_SB2 0x00040000
/* Enable SBUS device 2 arbitration */
#define IOMMU_MID_SB1 0x00020000
/* Enable SBUS device 1 arbitration */
#define IOMMU_MID_SB0 0x00010000
/* Enable SBUS device 0 arbitration */
#define IOMMU_MID_MID 0x0000000f
/* Module-id, hardcoded to 0x8 */
/* The format of an iopte in the page tables */
#define IOPTE_PAGE 0x07ffff00
/* Physical page number (PA[30:12]) */
#define IOPTE_CACHE 0x00000080
/* Cached (in vme IOCACHE or Viking/MXCC) */
#define IOPTE_WRITE 0x00000004
/* Writeable */
#define IOPTE_VALID 0x00000002
/* IOPTE is valid */
#define IOPTE_WAZ 0x00000001
/* Write as zeros */
struct iommu_struct {
struct iommu_regs __iomem *regs;
iopte_t *page_table;
/* For convenience */
unsigned long start; /* First managed virtual address */
unsigned long end; /* Last managed virtual address */
struct bit_map usemap;
};
static inline void iommu_invalidate(struct iommu_regs __iomem *regs)
{
sbus_writel(0, ®s->tlbflush);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sam Ravnborg | 23 | 100.00% | 2 | 100.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
static inline void iommu_invalidate_page(struct iommu_regs __iomem *regs, unsigned long ba)
{
sbus_writel(ba & PAGE_MASK, ®s->pageflush);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sam Ravnborg | 29 | 100.00% | 2 | 100.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
#endif /* !(_SPARC_IOMMU_H) */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sam Ravnborg | 446 | 100.00% | 2 | 100.00% |
| Total | 446 | 100.00% | 2 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.