mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-22 17:33:01 +00:00
3115624eda
Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: David S. Miller <davem@davemloft.net>
143 lines
5.0 KiB
C
143 lines
5.0 KiB
C
/* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
|
|
* sbus.h: Defines for the Sun SBus.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
*/
|
|
|
|
#ifndef _SPARC_SBUS_H
|
|
#define _SPARC_SBUS_H
|
|
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/ioport.h>
|
|
|
|
#include <asm/oplib.h>
|
|
/* #include <asm/iommu.h> */ /* Unused since we use opaque iommu (|io-unit) */
|
|
#include <asm/scatterlist.h>
|
|
|
|
/* We scan which devices are on the SBus using the PROM node device
|
|
* tree. SBus devices are described in two different ways. You can
|
|
* either get an absolute address at which to access the device, or
|
|
* you can get a SBus 'slot' number and an offset within that slot.
|
|
*/
|
|
|
|
/* The base address at which to calculate device OBIO addresses. */
|
|
#define SUN_SBUS_BVADDR 0xf8000000
|
|
#define SBUS_OFF_MASK 0x01ffffff
|
|
|
|
/* These routines are used to calculate device address from slot
|
|
* numbers + offsets, and vice versa.
|
|
*/
|
|
|
|
static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
|
|
{
|
|
return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
|
|
}
|
|
|
|
static inline int sbus_dev_slot(unsigned long dev_addr)
|
|
{
|
|
return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
|
|
}
|
|
|
|
struct sbus_bus;
|
|
|
|
/* Linux SBUS device tables */
|
|
struct sbus_dev {
|
|
struct sbus_bus *bus; /* Back ptr to sbus */
|
|
struct sbus_dev *next; /* next device on this SBus or null */
|
|
struct sbus_dev *child; /* For ledma and espdma on sun4m */
|
|
struct sbus_dev *parent; /* Parent device if not toplevel */
|
|
int prom_node; /* PROM device tree node for this device */
|
|
char prom_name[64]; /* PROM device name */
|
|
int slot;
|
|
|
|
struct resource resource[PROMREG_MAX];
|
|
|
|
struct linux_prom_registers reg_addrs[PROMREG_MAX];
|
|
int num_registers, ranges_applied;
|
|
|
|
struct linux_prom_ranges device_ranges[PROMREG_MAX];
|
|
int num_device_ranges;
|
|
|
|
unsigned int irqs[4];
|
|
int num_irqs;
|
|
};
|
|
|
|
/* This struct describes the SBus(s) found on this machine. */
|
|
struct sbus_bus {
|
|
void *iommu; /* Opaque IOMMU cookie */
|
|
struct sbus_dev *devices; /* Link to devices on this SBus */
|
|
struct sbus_bus *next; /* next SBus, if more than one SBus */
|
|
int prom_node; /* PROM device tree node for this SBus */
|
|
char prom_name[64]; /* Usually "sbus" or "sbi" */
|
|
int clock_freq;
|
|
|
|
struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
|
|
int num_sbus_ranges;
|
|
|
|
int devid;
|
|
int board;
|
|
};
|
|
|
|
extern struct sbus_bus *sbus_root;
|
|
|
|
static inline int
|
|
sbus_is_slave(struct sbus_dev *dev)
|
|
{
|
|
/* XXX Have to write this for sun4c's */
|
|
return 0;
|
|
}
|
|
|
|
/* Device probing routines could find these handy */
|
|
#define for_each_sbus(bus) \
|
|
for((bus) = sbus_root; (bus); (bus)=(bus)->next)
|
|
|
|
#define for_each_sbusdev(device, bus) \
|
|
for((device) = (bus)->devices; (device); (device)=(device)->next)
|
|
|
|
#define for_all_sbusdev(device, bus) \
|
|
for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
|
|
for ((device) = (bus)->devices; (device); (device) = (device)->next)
|
|
|
|
/* Driver DVMA interfaces. */
|
|
#define sbus_can_dma_64bit(sdev) (0) /* actually, sparc_cpu_model==sun4d */
|
|
#define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */
|
|
extern void sbus_set_sbus64(struct sbus_dev *, int);
|
|
|
|
/* These yield IOMMU mappings in consistent mode. */
|
|
extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
|
|
extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
|
|
void prom_adjust_ranges(struct linux_prom_ranges *, int,
|
|
struct linux_prom_ranges *, int);
|
|
|
|
#define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
|
|
#define SBUS_DMA_TODEVICE DMA_TO_DEVICE
|
|
#define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
|
|
#define SBUS_DMA_NONE DMA_NONE
|
|
|
|
/* All the rest use streaming mode mappings. */
|
|
extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
|
|
extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
|
|
extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
|
|
extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
|
|
|
|
/* Finally, allow explicit synchronization of streamable mappings. */
|
|
extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
|
|
#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
|
|
extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
|
|
extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
|
|
#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
|
|
extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
|
|
|
|
/* Eric Brower (ebrower@usa.net)
|
|
* Translate SBus interrupt levels to ino values--
|
|
* this is used when converting sbus "interrupts" OBP
|
|
* node values to "intr" node values, and is platform
|
|
* dependent. If only we could call OBP with
|
|
* "sbus-intr>cpu (sbint -- ino)" from kernel...
|
|
* See .../drivers/sbus/sbus.c for details.
|
|
*/
|
|
BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
|
|
#define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
|
|
|
|
#endif /* !(_SPARC_SBUS_H) */
|