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Diffstat (limited to 'include/asm-m68k/dvma.h')
| -rw-r--r-- | include/asm-m68k/dvma.h | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/include/asm-m68k/dvma.h b/include/asm-m68k/dvma.h deleted file mode 100644 index 890bbf7e775..00000000000 --- a/include/asm-m68k/dvma.h +++ /dev/null @@ -1,240 +0,0 @@ -/* - * include/asm-m68k/dma.h - * - * Copyright 1995 (C) David S. Miller (davem@caip.rutgers.edu) - * - * Hacked to fit Sun3x needs by Thomas Bogendoerfer - */ - -#ifndef __M68K_DVMA_H -#define __M68K_DVMA_H - - -#define DVMA_PAGE_SHIFT 13 -#define DVMA_PAGE_SIZE (1UL << DVMA_PAGE_SHIFT) -#define DVMA_PAGE_MASK (~(DVMA_PAGE_SIZE-1)) -#define DVMA_PAGE_ALIGN(addr) ALIGN(addr, DVMA_PAGE_SIZE) - -extern void dvma_init(void); -extern int dvma_map_iommu(unsigned long kaddr, unsigned long baddr, - int len); - -#define dvma_malloc(x) dvma_malloc_align(x, 0) -#define dvma_map(x, y) dvma_map_align(x, y, 0) -#define dvma_map_vme(x, y) (dvma_map(x, y) & 0xfffff) -#define dvma_map_align_vme(x, y, z) (dvma_map_align (x, y, z) & 0xfffff) -extern unsigned long dvma_map_align(unsigned long kaddr, int len, - int align); -extern void *dvma_malloc_align(unsigned long len, unsigned long align); - -extern void dvma_unmap(void *baddr); -extern void dvma_free(void *vaddr); - - -#ifdef CONFIG_SUN3 -/* sun3 dvma page support */ - -/* memory and pmegs potentially reserved for dvma */ -#define DVMA_PMEG_START 10 -#define DVMA_PMEG_END 16 -#define DVMA_START 0xf00000 -#define DVMA_END 0xfe0000 -#define DVMA_SIZE (DVMA_END-DVMA_START) -#define IOMMU_TOTAL_ENTRIES 128 -#define IOMMU_ENTRIES 120 - -/* empirical kludge -- dvma regions only seem to work right on 0x10000 - byte boundaries */ -#define DVMA_REGION_SIZE 0x10000 -#define DVMA_ALIGN(addr) (((addr)+DVMA_REGION_SIZE-1) & \ - ~(DVMA_REGION_SIZE-1)) - -/* virt <-> phys conversions */ -#define dvma_vtop(x) ((unsigned long)(x) & 0xffffff) -#define dvma_ptov(x) ((unsigned long)(x) | 0xf000000) -#define dvma_vtovme(x) ((unsigned long)(x) & 0x00fffff) -#define dvma_vmetov(x) ((unsigned long)(x) | 0xff00000) -#define dvma_vtob(x) dvma_vtop(x) -#define dvma_btov(x) dvma_ptov(x) - -static inline int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr, - int len) -{ - return 0; -} - -#else /* Sun3x */ - -/* sun3x dvma page support */ - -#define DVMA_START 0x0 -#define DVMA_END 0xf00000 -#define DVMA_SIZE (DVMA_END-DVMA_START) -#define IOMMU_TOTAL_ENTRIES 2048 -/* the prom takes the top meg */ -#define IOMMU_ENTRIES (IOMMU_TOTAL_ENTRIES - 0x80) - -#define dvma_vtob(x) ((unsigned long)(x) & 0x00ffffff) -#define dvma_btov(x) ((unsigned long)(x) | 0xff000000) - -extern int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr, int len); - - - -/* everything below this line is specific to dma used for the onboard - ESP scsi on sun3x */ - -/* Structure to describe the current status of DMA registers on the Sparc */ -struct sparc_dma_registers { - __volatile__ unsigned long cond_reg; /* DMA condition register */ - __volatile__ unsigned long st_addr; /* Start address of this transfer */ - __volatile__ unsigned long cnt; /* How many bytes to transfer */ - __volatile__ unsigned long dma_test; /* DMA test register */ -}; - -/* DVMA chip revisions */ -enum dvma_rev { - dvmarev0, - dvmaesc1, - dvmarev1, - dvmarev2, - dvmarev3, - dvmarevplus, - dvmahme -}; - -#define DMA_HASCOUNT(rev) ((rev)==dvmaesc1) - -/* Linux DMA information structure, filled during probe. */ -struct Linux_SBus_DMA { - struct Linux_SBus_DMA *next; - struct linux_sbus_device *SBus_dev; - struct sparc_dma_registers *regs; - - /* Status, misc info */ - int node; /* Prom node for this DMA device */ - int running; /* Are we doing DMA now? */ - int allocated; /* Are we "owned" by anyone yet? */ - - /* Transfer information. */ - unsigned long addr; /* Start address of current transfer */ - int nbytes; /* Size of current transfer */ - int realbytes; /* For splitting up large transfers, etc. */ - - /* DMA revision */ - enum dvma_rev revision; -}; - -extern struct Linux_SBus_DMA *dma_chain; - -/* Broken hardware... */ -#define DMA_ISBROKEN(dma) ((dma)->revision == dvmarev1) -#define DMA_ISESC1(dma) ((dma)->revision == dvmaesc1) - -/* Fields in the cond_reg register */ -/* First, the version identification bits */ -#define DMA_DEVICE_ID 0xf0000000 /* Device identification bits */ -#define DMA_VERS0 0x00000000 /* Sunray DMA version */ -#define DMA_ESCV1 0x40000000 /* DMA ESC Version 1 */ -#define DMA_VERS1 0x80000000 /* DMA rev 1 */ -#define DMA_VERS2 0xa0000000 /* DMA rev 2 */ -#define DMA_VERHME 0xb0000000 /* DMA hme gate array */ -#define DMA_VERSPLUS 0x90000000 /* DMA rev 1 PLUS */ - -#define DMA_HNDL_INTR 0x00000001 /* An IRQ needs to be handled */ -#define DMA_HNDL_ERROR 0x00000002 /* We need to take an error */ -#define DMA_FIFO_ISDRAIN 0x0000000c /* The DMA FIFO is draining */ -#define DMA_INT_ENAB 0x00000010 /* Turn on interrupts */ -#define DMA_FIFO_INV 0x00000020 /* Invalidate the FIFO */ -#define DMA_ACC_SZ_ERR 0x00000040 /* The access size was bad */ -#define DMA_FIFO_STDRAIN 0x00000040 /* DMA_VERS1 Drain the FIFO */ -#define DMA_RST_SCSI 0x00000080 /* Reset the SCSI controller */ -#define DMA_RST_ENET DMA_RST_SCSI /* Reset the ENET controller */ -#define DMA_ST_WRITE 0x00000100 /* write from device to memory */ -#define DMA_ENABLE 0x00000200 /* Fire up DMA, handle requests */ -#define DMA_PEND_READ 0x00000400 /* DMA_VERS1/0/PLUS Pending Read */ -#define DMA_ESC_BURST 0x00000800 /* 1=16byte 0=32byte */ -#define DMA_READ_AHEAD 0x00001800 /* DMA read ahead partial longword */ -#define DMA_DSBL_RD_DRN 0x00001000 /* No EC drain on slave reads */ -#define DMA_BCNT_ENAB 0x00002000 /* If on, use the byte counter */ -#define DMA_TERM_CNTR 0x00004000 /* Terminal counter */ -#define DMA_CSR_DISAB 0x00010000 /* No FIFO drains during csr */ -#define DMA_SCSI_DISAB 0x00020000 /* No FIFO drains during reg */ -#define DMA_DSBL_WR_INV 0x00020000 /* No EC inval. on slave writes */ -#define DMA_ADD_ENABLE 0x00040000 /* Special ESC DVMA optimization */ -#define DMA_E_BURST8 0x00040000 /* ENET: SBUS r/w burst size */ -#define DMA_BRST_SZ 0x000c0000 /* SCSI: SBUS r/w burst size */ -#define DMA_BRST64 0x00080000 /* SCSI: 64byte bursts (HME on UltraSparc only) */ -#define DMA_BRST32 0x00040000 /* SCSI: 32byte bursts */ -#define DMA_BRST16 0x00000000 /* SCSI: 16byte bursts */ -#define DMA_BRST0 0x00080000 /* SCSI: no bursts (non-HME gate arrays) */ -#define DMA_ADDR_DISAB 0x00100000 /* No FIFO drains during addr */ -#define DMA_2CLKS 0x00200000 /* Each transfer = 2 clock ticks */ -#define DMA_3CLKS 0x00400000 /* Each transfer = 3 clock ticks */ -#define DMA_EN_ENETAUI DMA_3CLKS /* Put lance into AUI-cable mode */ -#define DMA_CNTR_DISAB 0x00800000 /* No IRQ when DMA_TERM_CNTR set */ -#define DMA_AUTO_NADDR 0x01000000 /* Use "auto nxt addr" feature */ -#define DMA_SCSI_ON 0x02000000 /* Enable SCSI dma */ -#define DMA_PARITY_OFF 0x02000000 /* HME: disable parity checking */ -#define DMA_LOADED_ADDR 0x04000000 /* Address has been loaded */ -#define DMA_LOADED_NADDR 0x08000000 /* Next address has been loaded */ - -/* Values describing the burst-size property from the PROM */ -#define DMA_BURST1 0x01 -#define DMA_BURST2 0x02 -#define DMA_BURST4 0x04 -#define DMA_BURST8 0x08 -#define DMA_BURST16 0x10 -#define DMA_BURST32 0x20 -#define DMA_BURST64 0x40 -#define DMA_BURSTBITS 0x7f - -/* Determine highest possible final transfer address given a base */ -#define DMA_MAXEND(addr) (0x01000000UL-(((unsigned long)(addr))&0x00ffffffUL)) - -/* Yes, I hack a lot of elisp in my spare time... */ -#define DMA_ERROR_P(regs) ((((regs)->cond_reg) & DMA_HNDL_ERROR)) -#define DMA_IRQ_P(regs) ((((regs)->cond_reg) & (DMA_HNDL_INTR | DMA_HNDL_ERROR))) -#define DMA_WRITE_P(regs) ((((regs)->cond_reg) & DMA_ST_WRITE)) -#define DMA_OFF(regs) ((((regs)->cond_reg) &= (~DMA_ENABLE))) -#define DMA_INTSOFF(regs) ((((regs)->cond_reg) &= (~DMA_INT_ENAB))) -#define DMA_INTSON(regs) ((((regs)->cond_reg) |= (DMA_INT_ENAB))) -#define DMA_PUNTFIFO(regs) ((((regs)->cond_reg) |= DMA_FIFO_INV)) -#define DMA_SETSTART(regs, addr) ((((regs)->st_addr) = (char *) addr)) -#define DMA_BEGINDMA_W(regs) \ - ((((regs)->cond_reg |= (DMA_ST_WRITE|DMA_ENABLE|DMA_INT_ENAB)))) -#define DMA_BEGINDMA_R(regs) \ - ((((regs)->cond_reg |= ((DMA_ENABLE|DMA_INT_ENAB)&(~DMA_ST_WRITE))))) - -/* For certain DMA chips, we need to disable ints upon irq entry - * and turn them back on when we are done. So in any ESP interrupt - * handler you *must* call DMA_IRQ_ENTRY upon entry and DMA_IRQ_EXIT - * when leaving the handler. You have been warned... - */ -#define DMA_IRQ_ENTRY(dma, dregs) do { \ - if(DMA_ISBROKEN(dma)) DMA_INTSOFF(dregs); \ - } while (0) - -#define DMA_IRQ_EXIT(dma, dregs) do { \ - if(DMA_ISBROKEN(dma)) DMA_INTSON(dregs); \ - } while(0) - -/* Reset the friggin' thing... */ -#define DMA_RESET(dma) do { \ - struct sparc_dma_registers *regs = dma->regs; \ - /* Let the current FIFO drain itself */ \ - sparc_dma_pause(regs, (DMA_FIFO_ISDRAIN)); \ - /* Reset the logic */ \ - regs->cond_reg |= (DMA_RST_SCSI); /* assert */ \ - __delay(400); /* let the bits set ;) */ \ - regs->cond_reg &= ~(DMA_RST_SCSI); /* de-assert */ \ - sparc_dma_enable_interrupts(regs); /* Re-enable interrupts */ \ - /* Enable FAST transfers if available */ \ - if(dma->revision>dvmarev1) regs->cond_reg |= DMA_3CLKS; \ - dma->running = 0; \ -} while(0) - - -#endif /* !CONFIG_SUN3 */ - -#endif /* !(__M68K_DVMA_H) */ |