xbow.h

linux-2.4.29操作系统的源码

/* $Id$
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1992-1997,2000-2003 Silicon Graphics, Inc. All Rights Reserved.
 */
#ifndef _ASM_SN_SN_XTALK_XBOW_H
#define _ASM_SN_SN_XTALK_XBOW_H

/*
 * xbow.h - header file for crossbow chip and xbow section of xbridge
 */

#include <linux/config.h>
#include <asm/sn/xtalk/xtalk.h>
#include <asm/sn/xtalk/xwidget.h>
#include <asm/sn/xtalk/xswitch.h>
#ifndef __ASSEMBLY__
#include <asm/sn/xtalk/xbow_info.h>
#endif


#define	XBOW_DRV_PREFIX	"xbow_"

/* The crossbow chip supports 8 8/16 bits I/O ports, numbered 0x8 through 0xf.
 * It also implements the widget 0 address space and register set.
 */
#define XBOW_PORT_0	0x0
#define XBOW_PORT_8	0x8
#define XBOW_PORT_9	0x9
#define XBOW_PORT_A	0xa
#define XBOW_PORT_B	0xb
#define XBOW_PORT_C	0xc
#define XBOW_PORT_D	0xd
#define XBOW_PORT_E	0xe
#define XBOW_PORT_F	0xf

#define MAX_XBOW_PORTS	8	/* number of ports on xbow chip */
#define BASE_XBOW_PORT	XBOW_PORT_8	/* Lowest external port */
#define MAX_PORT_NUM	0x10	/* maximum port number + 1 */
#define XBOW_WIDGET_ID	0	/* xbow is itself widget 0 */

#define XBOW_HUBLINK_LOW  0xa
#define XBOW_HUBLINK_HIGH 0xb

#define XBOW_PEER_LINK(link) (link == XBOW_HUBLINK_LOW) ? \
                                XBOW_HUBLINK_HIGH : XBOW_HUBLINK_LOW


#define	XBOW_CREDIT	4

#define MAX_XBOW_NAME 	16

#ifndef __ASSEMBLY__
typedef uint32_t      xbowreg_t;

#define XBOWCONST	(xbowreg_t)

/* Generic xbow register, given base and offset */
#define XBOW_REG_PTR(base, offset) ((volatile xbowreg_t*) \
	((__psunsigned_t)(base) + (__psunsigned_t)(offset)))

/* Register set for each xbow link */
typedef volatile struct xb_linkregs_s {
#ifdef LITTLE_ENDIAN
/* 
 * we access these through synergy unswizzled space, so the address
 * gets twiddled (i.e. references to 0x4 actually go to 0x0 and vv.)
 * That's why we put the register first and filler second.
 */
    xbowreg_t               link_ibf;
    xbowreg_t               filler0;	/* filler for proper alignment */
    xbowreg_t               link_control;
    xbowreg_t               filler1;
    xbowreg_t               link_status;
    xbowreg_t               filler2;
    xbowreg_t               link_arb_upper;
    xbowreg_t               filler3;
    xbowreg_t               link_arb_lower;
    xbowreg_t               filler4;
    xbowreg_t               link_status_clr;
    xbowreg_t               filler5;
    xbowreg_t               link_reset;
    xbowreg_t               filler6;
    xbowreg_t               link_aux_status;
    xbowreg_t               filler7;
#else
    xbowreg_t               filler0;	/* filler for proper alignment */
    xbowreg_t               link_ibf;
    xbowreg_t               filler1;
    xbowreg_t               link_control;
    xbowreg_t               filler2;
    xbowreg_t               link_status;
    xbowreg_t               filler3;
    xbowreg_t               link_arb_upper;
    xbowreg_t               filler4;
    xbowreg_t               link_arb_lower;
    xbowreg_t               filler5;
    xbowreg_t               link_status_clr;
    xbowreg_t               filler6;
    xbowreg_t               link_reset;
    xbowreg_t               filler7;
    xbowreg_t               link_aux_status;
#endif /* LITTLE_ENDIAN */
} xb_linkregs_t;

typedef volatile struct xbow_s {
    /* standard widget configuration                       0x000000-0x000057 */
    widget_cfg_t            xb_widget;  /* 0x000000 */

    /* helper fieldnames for accessing bridge widget */

#define xb_wid_id                       xb_widget.w_id
#define xb_wid_stat                     xb_widget.w_status
#define xb_wid_err_upper                xb_widget.w_err_upper_addr
#define xb_wid_err_lower                xb_widget.w_err_lower_addr
#define xb_wid_control                  xb_widget.w_control
#define xb_wid_req_timeout              xb_widget.w_req_timeout
#define xb_wid_int_upper                xb_widget.w_intdest_upper_addr
#define xb_wid_int_lower                xb_widget.w_intdest_lower_addr
#define xb_wid_err_cmdword              xb_widget.w_err_cmd_word
#define xb_wid_llp                      xb_widget.w_llp_cfg
#define xb_wid_stat_clr                 xb_widget.w_tflush

#ifdef LITTLE_ENDIAN
/* 
 * we access these through synergy unswizzled space, so the address
 * gets twiddled (i.e. references to 0x4 actually go to 0x0 and vv.)
 * That's why we put the register first and filler second.
 */
    /* xbow-specific widget configuration                  0x000058-0x0000FF */
    xbowreg_t               xb_wid_arb_reload;  /* 0x00005C */
    xbowreg_t               _pad_000058;
    xbowreg_t               xb_perf_ctr_a;      /* 0x000064 */
    xbowreg_t               _pad_000060;
    xbowreg_t               xb_perf_ctr_b;      /* 0x00006c */
    xbowreg_t               _pad_000068;
    xbowreg_t               xb_nic;     /* 0x000074 */
    xbowreg_t               _pad_000070;

    /* Xbridge only */
    xbowreg_t               xb_w0_rst_fnc;      /* 0x00007C */
    xbowreg_t               _pad_000078;
    xbowreg_t               xb_l8_rst_fnc;      /* 0x000084 */
    xbowreg_t               _pad_000080;
    xbowreg_t               xb_l9_rst_fnc;      /* 0x00008c */
    xbowreg_t               _pad_000088;
    xbowreg_t               xb_la_rst_fnc;      /* 0x000094 */
    xbowreg_t               _pad_000090;
    xbowreg_t               xb_lb_rst_fnc;      /* 0x00009c */
    xbowreg_t               _pad_000098;
    xbowreg_t               xb_lc_rst_fnc;      /* 0x0000a4 */
    xbowreg_t               _pad_0000a0;
    xbowreg_t               xb_ld_rst_fnc;      /* 0x0000ac */
    xbowreg_t               _pad_0000a8;
    xbowreg_t               xb_le_rst_fnc;      /* 0x0000b4 */
    xbowreg_t               _pad_0000b0;
    xbowreg_t               xb_lf_rst_fnc;      /* 0x0000bc */
    xbowreg_t               _pad_0000b8;
    xbowreg_t               xb_lock;            /* 0x0000c4 */
    xbowreg_t               _pad_0000c0;
    xbowreg_t               xb_lock_clr;        /* 0x0000cc */
    xbowreg_t               _pad_0000c8;
    /* end of Xbridge only */
    xbowreg_t               _pad_0000d0[12];
#else
    /* xbow-specific widget configuration                  0x000058-0x0000FF */
    xbowreg_t               _pad_000058;
    xbowreg_t               xb_wid_arb_reload;  /* 0x00005C */
    xbowreg_t               _pad_000060;
    xbowreg_t               xb_perf_ctr_a;      /* 0x000064 */
    xbowreg_t               _pad_000068;
    xbowreg_t               xb_perf_ctr_b;      /* 0x00006c */
    xbowreg_t               _pad_000070;
    xbowreg_t               xb_nic;     /* 0x000074 */

    /* Xbridge only */
    xbowreg_t               _pad_000078;
    xbowreg_t               xb_w0_rst_fnc;      /* 0x00007C */
    xbowreg_t               _pad_000080;
    xbowreg_t               xb_l8_rst_fnc;      /* 0x000084 */
    xbowreg_t               _pad_000088;
    xbowreg_t               xb_l9_rst_fnc;      /* 0x00008c */
    xbowreg_t               _pad_000090;
    xbowreg_t               xb_la_rst_fnc;      /* 0x000094 */
    xbowreg_t               _pad_000098;
    xbowreg_t               xb_lb_rst_fnc;      /* 0x00009c */
    xbowreg_t               _pad_0000a0;
    xbowreg_t               xb_lc_rst_fnc;      /* 0x0000a4 */
    xbowreg_t               _pad_0000a8;
    xbowreg_t               xb_ld_rst_fnc;      /* 0x0000ac */
    xbowreg_t               _pad_0000b0;
    xbowreg_t               xb_le_rst_fnc;      /* 0x0000b4 */
    xbowreg_t               _pad_0000b8;
    xbowreg_t               xb_lf_rst_fnc;      /* 0x0000bc */
    xbowreg_t               _pad_0000c0;
    xbowreg_t               xb_lock;            /* 0x0000c4 */
    xbowreg_t               _pad_0000c8;
    xbowreg_t               xb_lock_clr;        /* 0x0000cc */
    /* end of Xbridge only */
    xbowreg_t               _pad_0000d0[12];
#endif /* LITTLE_ENDIAN */

    /* Link Specific Registers, port 8..15                 0x000100-0x000300 */
    xb_linkregs_t           xb_link_raw[MAX_XBOW_PORTS];
#define xb_link(p)      xb_link_raw[(p) & (MAX_XBOW_PORTS - 1)]

} xbow_t;

/* Configuration structure which describes each xbow link */
typedef struct xbow_cfg_s {
    int			    xb_port;	/* port number (0-15) */
    int			    xb_flags;	/* port software flags */
    short		    xb_shift;	/* shift for arb reg (mask is 0xff) */
    short		    xb_ul;	/* upper or lower arb reg */
    int			    xb_pad;	/* use this later (pad to ptr align) */
    xb_linkregs_t	   *xb_linkregs;	/* pointer to link registers */
    widget_cfg_t	   *xb_widget;	/* pointer to widget registers */
    char		    xb_name[MAX_XBOW_NAME];	/* port name */
    xbowreg_t		    xb_sh_arb_upper;	/* shadow upper arb register */
    xbowreg_t		    xb_sh_arb_lower;	/* shadow lower arb register */
} xbow_cfg_t;

#define XB_FLAGS_EXISTS		0x1	/* device exists */
#define XB_FLAGS_MASTER		0x2
#define XB_FLAGS_SLAVE		0x0
#define XB_FLAGS_GBR		0x4
#define XB_FLAGS_16BIT		0x8
#define XB_FLAGS_8BIT		0x0

/* get xbow config information for port p */
#define XB_CONFIG(p)	xbow_cfg[xb_ports[p]]

/* is widget port number valid?  (based on version 7.0 of xbow spec) */
#define XBOW_WIDGET_IS_VALID(wid) ((wid) >= XBOW_PORT_8 && (wid) <= XBOW_PORT_F)

/* whether to use upper or lower arbitration register, given source widget id */
#define XBOW_ARB_IS_UPPER(wid) 	((wid) >= XBOW_PORT_8 && (wid) <= XBOW_PORT_B)
#define XBOW_ARB_IS_LOWER(wid) 	((wid) >= XBOW_PORT_C && (wid) <= XBOW_PORT_F)

/* offset of arbitration register, given source widget id */
#define XBOW_ARB_OFF(wid) 	(XBOW_ARB_IS_UPPER(wid) ? 0x1c : 0x24)

#endif				/* __ASSEMBLY__ */

#define	XBOW_WID_ID		WIDGET_ID
#define	XBOW_WID_STAT		WIDGET_STATUS
#define	XBOW_WID_ERR_UPPER	WIDGET_ERR_UPPER_ADDR
#define	XBOW_WID_ERR_LOWER	WIDGET_ERR_LOWER_ADDR
#define	XBOW_WID_CONTROL	WIDGET_CONTROL
#define	XBOW_WID_REQ_TO		WIDGET_REQ_TIMEOUT
#define	XBOW_WID_INT_UPPER	WIDGET_INTDEST_UPPER_ADDR
#define	XBOW_WID_INT_LOWER	WIDGET_INTDEST_LOWER_ADDR
#define	XBOW_WID_ERR_CMDWORD	WIDGET_ERR_CMD_WORD
#define	XBOW_WID_LLP		WIDGET_LLP_CFG
#define	XBOW_WID_STAT_CLR	WIDGET_TFLUSH
#define XBOW_WID_ARB_RELOAD 	0x5c
#define XBOW_WID_PERF_CTR_A 	0x64
#define XBOW_WID_PERF_CTR_B 	0x6c
#define XBOW_WID_NIC 		0x74

/* Xbridge only */
#define XBOW_W0_RST_FNC		0x00007C
#define	XBOW_L8_RST_FNC		0x000084
#define	XBOW_L9_RST_FNC		0x00008c
#define	XBOW_LA_RST_FNC		0x000094
#define	XBOW_LB_RST_FNC		0x00009c
#define	XBOW_LC_RST_FNC		0x0000a4
#define	XBOW_LD_RST_FNC		0x0000ac
#define	XBOW_LE_RST_FNC		0x0000b4
#define	XBOW_LF_RST_FNC		0x0000bc
#define XBOW_RESET_FENCE(x) ((x) > 7 && (x) < 16) ? \
				(XBOW_W0_RST_FNC + ((x) - 7) * 8) : \
				((x) == 0) ? XBOW_W0_RST_FNC : 0
#define XBOW_LOCK		0x0000c4
#define XBOW_LOCK_CLR		0x0000cc
/* End of Xbridge only */

/* used only in ide, but defined here within the reserved portion */
/*              of the widget0 address space (before 0xf4) */
#define	XBOW_WID_UNDEF		0xe4

/* pointer to link arbitration register, given xbow base, dst and src widget id */
#define XBOW_PRIO_ARBREG_PTR(base, dst_wid, src_wid) \
	XBOW_REG_PTR(XBOW_PRIO_LINKREGS_PTR(base, dst_wid), XBOW_ARB_OFF(src_wid))

/* pointer to link registers base, given xbow base and destination widget id */
#define XBOW_PRIO_LINKREGS_PTR(base, dst_wid) (xb_linkregs_t*) \
	XBOW_REG_PTR(base, XB_LINK_REG_BASE(dst_wid))

/* xbow link register set base, legal value for x is 0x8..0xf */
#define	XB_LINK_BASE		0x100
#define	XB_LINK_OFFSET		0x40
#define	XB_LINK_REG_BASE(x)	(XB_LINK_BASE + ((x) & (MAX_XBOW_PORTS - 1)) * XB_LINK_OFFSET)

#define	XB_LINK_IBUF_FLUSH(x)	(XB_LINK_REG_BASE(x) + 0x4)
#define	XB_LINK_CTRL(x)		(XB_LINK_REG_BASE(x) + 0xc)
#define	XB_LINK_STATUS(x)	(XB_LINK_REG_BASE(x) + 0x14)
#define	XB_LINK_ARB_UPPER(x)	(XB_LINK_REG_BASE(x) + 0x1c)
#define	XB_LINK_ARB_LOWER(x)	(XB_LINK_REG_BASE(x) + 0x24)
#define	XB_LINK_STATUS_CLR(x)	(XB_LINK_REG_BASE(x) + 0x2c)
#define	XB_LINK_RESET(x)	(XB_LINK_REG_BASE(x) + 0x34)