mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
63 lines
2.6 KiB
C
63 lines
2.6 KiB
C
/* io-unit.h: Definitions for the sun4d IO-UNIT.
|
|
*
|
|
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
#ifndef _SPARC_IO_UNIT_H
|
|
#define _SPARC_IO_UNIT_H
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
/* The io-unit 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 xdbus so are
|
|
* translated by the on chip SRMMU. The io-unit 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 io-unit handles all dvma sbus activity.
|
|
*/
|
|
|
|
/* AIEEE, unlike the nice sun4m, these monsters have
|
|
fixed DMA range 64M */
|
|
|
|
#define IOUNIT_DMA_BASE 0xfc000000 /* TOP - 64M */
|
|
#define IOUNIT_DMA_SIZE 0x04000000 /* 64M */
|
|
/* We use last 1M for sparc_dvma_malloc */
|
|
#define IOUNIT_DVMA_SIZE 0x00100000 /* 1M */
|
|
|
|
/* The format of an iopte in the external page tables */
|
|
#define IOUPTE_PAGE 0xffffff00 /* Physical page number (PA[35:12]) */
|
|
#define IOUPTE_CACHE 0x00000080 /* Cached (in Viking/MXCC) */
|
|
/* XXX Jakub, find out how to program SBUS streaming cache on XDBUS/sun4d.
|
|
* XXX Actually, all you should need to do is find out where the registers
|
|
* XXX are and copy over the sparc64 implementation I wrote. There may be
|
|
* XXX some horrible hwbugs though, so be careful. -DaveM
|
|
*/
|
|
#define IOUPTE_STREAM 0x00000040 /* Translation can use streaming cache */
|
|
#define IOUPTE_INTRA 0x00000008 /* SBUS direct slot->slot transfer */
|
|
#define IOUPTE_WRITE 0x00000004 /* Writeable */
|
|
#define IOUPTE_VALID 0x00000002 /* IOPTE is valid */
|
|
#define IOUPTE_PARITY 0x00000001 /* Parity is checked during DVMA */
|
|
|
|
struct iounit_struct {
|
|
unsigned long bmap[(IOUNIT_DMA_SIZE >> (PAGE_SHIFT + 3)) / sizeof(unsigned long)];
|
|
spinlock_t lock;
|
|
iopte_t *page_table;
|
|
unsigned long rotor[3];
|
|
unsigned long limit[4];
|
|
};
|
|
|
|
#define IOUNIT_BMAP1_START 0x00000000
|
|
#define IOUNIT_BMAP1_END (IOUNIT_DMA_SIZE >> (PAGE_SHIFT + 1))
|
|
#define IOUNIT_BMAP2_START IOUNIT_BMAP1_END
|
|
#define IOUNIT_BMAP2_END IOUNIT_BMAP2_START + (IOUNIT_DMA_SIZE >> (PAGE_SHIFT + 2))
|
|
#define IOUNIT_BMAPM_START IOUNIT_BMAP2_END
|
|
#define IOUNIT_BMAPM_END ((IOUNIT_DMA_SIZE - IOUNIT_DVMA_SIZE) >> PAGE_SHIFT)
|
|
|
|
extern __u32 iounit_map_dma_init(struct sbus_bus *, int);
|
|
#define iounit_map_dma_finish(sbus, addr, len) mmu_release_scsi_one(addr, len, sbus)
|
|
extern __u32 iounit_map_dma_page(__u32, void *, struct sbus_bus *);
|
|
|
|
#endif /* !(_SPARC_IO_UNIT_H) */
|