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/* $OpenBSD: xbow.h,v 1.7 2009/08/18 19:31:59 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;
extern paddr_t xbow_intr_widget_register;
extern int (*xbow_intr_widget_intr_register)(int, int, int *);
extern int (*xbow_intr_widget_intr_establish)(int (*)(void *), void *,
int, int, const char *);
extern void (*xbow_intr_widget_intr_disestablish)(int);
/*
* Common Widget Registers. Every widget provides them.
*
* Registers are 32 or 64 bit wide (depending on the particular widget
* or register) on 64 bit boundaries.
* The widget_{read,write}_[48] functions below hide the addressing
* games required to perform 32 bit accesses.
*/
#define WIDGET_ID 0x0000
#define WIDGET_ID_REV_MASK 0xf0000000
#define WIDGET_ID_REV_SHIFT 28
#define WIDGET_ID_PRODUCT_MASK 0x0ffff000
#define WIDGET_ID_PRODUCT_SHIFT 12
#define WIDGET_ID_VENDOR_MASK 0x00000ffe
#define WIDGET_ID_VENDOR_SHIFT 1
#define WIDGET_STATUS 0x0008
#define WIDGET_ERR_ADDR_UPPER 0x0010
#define WIDGET_ERR_ADDR_LOWER 0x0018
#define WIDGET_CONTROL 0x0020
#define WIDGET_REQ_TIMEOUT 0x0028
#define WIDGET_INTDEST_ADDR_UPPER 0x0030
#define WIDGET_INTDEST_ADDR_LOWER 0x0038
#define WIDGET_ERR_CMD_WORD 0x0040
#define WIDGET_LLP_CFG 0x0048
#define WIDGET_TFLUSH 0x0050
/*
* Crossbow Specific Registers.
*/
#define XBOW_WID_ARB_RELOAD 0x0058
#define XBOW_PERFCNTR_A 0x0060
#define XBOW_PERFCNTR_B 0x0068
#define XBOW_NIC 0x0070
#define XBOW_WIDGET_LINK(w) (0x0100 + ((w) & 7) * 0x0040)
/*
* Per-widget ``Link'' Register Set.
*/
#define WIDGET_LINK_IBF 0x0000
#define WIDGET_LINK_CONTROL 0x0008
#define WIDGET_CONTROL_ALIVE 0x80000000
#define WIDGET_LINK_STATUS 0x0010
#define WIDGET_STATUS_ALIVE 0x80000000
#define WIDGET_LINK_ARB_UPPER 0x0018
#define WIDGET_LINK_ARB_LOWER 0x0020
#define WIDGET_LINK_STATUS_CLEAR 0x0028
#define WIDGET_LINK_RESET 0x0030
#define WIDGET_LINK_AUX_STATUS 0x0038
/*
* Valid widget values
*/
#define WIDGET_MIN 8
#define WIDGET_MAX 15
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;
};
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 *);
void xbow_intr_disestablish(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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