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/* $OpenBSD: xbow.h,v 1.12 2011/04/17 17:44:24 miod Exp $ */
/*
* Copyright (c) 2008 Miodrag Vallat.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _XBOW_H_
#define _XBOW_H_
/*
* Devices connected to the XBow are called ``widgets'' and are
* identified by a common widget memory area at the beginning of their
* memory space.
*
* Each widget has its own memory space. The lowest 16MB are always
* accessible as a so-called ``short window''. Other `views' of the
* widget are possible, depending on the system (the whole widget
* address space is always visible on Octane, while Origin family
* systems can only map a few ``large windows'', which are a scarce
* resource).
*
* Apart from the crossbow itself being widget #0, the widgets are divided
* in two groups: widgets #8 to #b are the ``upper'' widgets, while widgets
* #c to #f are the ``lower'' widgets.
*
* Widgets are uniquely identified with their widget number on the XBow
* bus. However, the way they are mapped and accessed will depend on the
* processor (well, the processor board node) requesting access. Hence the
* two parameters needed to map a widget.
*/
extern paddr_t (*xbow_widget_base)(int16_t, u_int);
extern paddr_t (*xbow_widget_map)(int16_t, u_int, bus_addr_t *, bus_size_t *);
extern int (*xbow_widget_id)(int16_t, u_int, uint32_t *);
extern int (*xbow_intr_widget_intr_register)(int, int, int *);
extern int (*xbow_intr_widget_intr_establish)(int (*)(void *), void *,
int, int, const char *, struct intrhand *);
extern void (*xbow_intr_widget_intr_disestablish)(int);
extern void (*xbow_intr_widget_intr_set)(int);
extern void (*xbow_intr_widget_intr_clear)(int);
/*
* Valid widget values
*/
#define WIDGET_MIN 8
#define WIDGET_MAX 15
/* interrupt register address on the master hub */
extern uint64_t xbow_intr_address;
struct xbow_attach_args {
int16_t xaa_nasid;
int xaa_widget;
uint32_t xaa_vendor;
uint32_t xaa_product;
uint32_t xaa_revision;
bus_space_tag_t xaa_iot;
/*
* WARNING! xaa_iot points to memory allocated on the stack,
* drivers need to make a copy of it.
*/
};
void xbow_build_bus_space(struct mips_bus_space *, int, int);
int xbow_intr_register(int, int, int *);
int xbow_intr_establish(int (*)(void *), void *, int, int, const char *,
struct intrhand *);
void xbow_intr_disestablish(int);
void xbow_intr_clear(int);
void xbow_intr_set(int);
paddr_t xbow_widget_map_space(struct device *, u_int,
bus_addr_t *, bus_size_t *);
int xbow_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int,
bus_space_handle_t *);
uint8_t xbow_read_1(bus_space_tag_t, bus_space_handle_t, bus_size_t);
uint16_t xbow_read_2(bus_space_tag_t, bus_space_handle_t, bus_size_t);
void xbow_read_raw_2(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
uint8_t *, bus_size_t);
void xbow_write_1(bus_space_tag_t, bus_space_handle_t, bus_size_t, uint8_t);
void xbow_write_2(bus_space_tag_t, bus_space_handle_t, bus_size_t,
uint16_t);
void xbow_write_raw_2(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
const uint8_t *, bus_size_t);
/*
* Widget register access routines hiding addressing games depending upon
* the access width.
*/
static __inline__ uint32_t
widget_read_4(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t a)
{
return bus_space_read_4(t, h, a | 4);
}
static __inline__ uint64_t
widget_read_8(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t a)
{
return bus_space_read_8(t, h, a);
}
static __inline__ void
widget_write_4(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t a,
uint32_t v)
{
bus_space_write_4(t, h, a | 4, v);
}
static __inline__ void
widget_write_8(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t a,
uint64_t v)
{
bus_space_write_8(t, h, a, v);
}
#endif /* _XBOW_H_ */
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