/* SPDX-License-Identifier: GPL-2.0 */ /* 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 __iomem *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) #endif /* !(_SPARC_IO_UNIT_H) */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 143 | 97.28% | 5 | 62.50% |
| Pete Zaitcev | 2 | 1.36% | 1 | 12.50% |
| Greg Kroah-Hartman | 1 | 0.68% | 1 | 12.50% |
| Sam Ravnborg | 1 | 0.68% | 1 | 12.50% |
| Total | 147 | 100.00% | 8 | 100.00% |