1575 lines
46 KiB
C
1575 lines
46 KiB
C
/*-
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* SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND BSD-3-Clause)
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*
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* Copyright (c) 2006-2008 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*/
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/*-
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* Copyright (c) 2001-2005, Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Intel XScale Network Processing Engine (NPE) support.
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*
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* Each NPE has an ixpnpeX device associated with it that is
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* attached at boot. Depending on the microcode loaded into
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* an NPE there may be an Ethernet interface (npeX) or some
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* other network interface (e.g. for ATM). This file has support
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* for loading microcode images and the associated NPE CPU
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* manipulations (start, stop, reset).
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*
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* The code here basically replaces the npeDl and npeMh classes
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* in the Intel Access Library (IAL).
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*
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* NB: Microcode images are loaded with firmware(9). To
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* include microcode in a static kernel include the
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* ixpnpe_fw device. Otherwise the firmware will be
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* automatically loaded from the filesystem.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/time.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/linker.h>
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#include <sys/firmware.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <arm/xscale/ixp425/ixp425reg.h>
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#include <arm/xscale/ixp425/ixp425var.h>
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#include <arm/xscale/ixp425/ixp425_npereg.h>
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#include <arm/xscale/ixp425/ixp425_npevar.h>
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struct ixpnpe_softc {
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device_t sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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bus_size_t sc_size; /* size of mapped register window */
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struct resource *sc_irq; /* IRQ resource */
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void *sc_ih; /* interrupt handler */
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struct mtx sc_mtx; /* mailbox lock */
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uint32_t sc_msg[2]; /* reply msg collected in ixpnpe_intr */
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int sc_msgwaiting; /* sc_msg holds valid data */
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int sc_npeid;
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int sc_nrefs; /* # of references */
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int validImage; /* valid ucode image loaded */
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int started; /* NPE is started */
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uint8_t functionalityId;/* ucode functionality ID */
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int insMemSize; /* size of instruction memory */
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int dataMemSize; /* size of data memory */
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uint32_t savedExecCount;
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uint32_t savedEcsDbgCtxtReg2;
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};
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static struct ixpnpe_softc *npes[NPE_MAX];
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#define IX_NPEDL_NPEIMAGE_FIELD_MASK 0xff
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/* used to read download map from version in microcode image */
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#define IX_NPEDL_BLOCK_TYPE_INSTRUCTION 0x00000000
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#define IX_NPEDL_BLOCK_TYPE_DATA 0x00000001
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#define IX_NPEDL_BLOCK_TYPE_STATE 0x00000002
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#define IX_NPEDL_END_OF_DOWNLOAD_MAP 0x0000000F
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/*
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* masks used to extract address info from State information context
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* register addresses as read from microcode image
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*/
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#define IX_NPEDL_MASK_STATE_ADDR_CTXT_REG 0x0000000F
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#define IX_NPEDL_MASK_STATE_ADDR_CTXT_NUM 0x000000F0
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/* LSB offset of Context Number field in State-Info Context Address */
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#define IX_NPEDL_OFFSET_STATE_ADDR_CTXT_NUM 4
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/* size (in words) of single State Information entry (ctxt reg address|data) */
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#define IX_NPEDL_STATE_INFO_ENTRY_SIZE 2
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typedef struct {
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uint32_t type;
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uint32_t offset;
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} IxNpeDlNpeMgrDownloadMapBlockEntry;
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typedef union {
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IxNpeDlNpeMgrDownloadMapBlockEntry block;
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uint32_t eodmMarker;
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} IxNpeDlNpeMgrDownloadMapEntry;
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typedef struct {
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/* 1st entry in the download map (there may be more than one) */
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IxNpeDlNpeMgrDownloadMapEntry entry[1];
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} IxNpeDlNpeMgrDownloadMap;
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/* used to access an instruction or data block in a microcode image */
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typedef struct {
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uint32_t npeMemAddress;
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uint32_t size;
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uint32_t data[1];
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} IxNpeDlNpeMgrCodeBlock;
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/* used to access each Context Reg entry state-information block */
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typedef struct {
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uint32_t addressInfo;
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uint32_t value;
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} IxNpeDlNpeMgrStateInfoCtxtRegEntry;
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/* used to access a state-information block in a microcode image */
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typedef struct {
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uint32_t size;
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IxNpeDlNpeMgrStateInfoCtxtRegEntry ctxtRegEntry[1];
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} IxNpeDlNpeMgrStateInfoBlock;
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static int npe_debug = 0;
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SYSCTL_INT(_debug, OID_AUTO, ixp425npe, CTLFLAG_RWTUN, &npe_debug,
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0, "IXP4XX NPE debug msgs");
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#define DPRINTF(dev, fmt, ...) do { \
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if (npe_debug) device_printf(dev, fmt, __VA_ARGS__); \
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} while (0)
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#define DPRINTFn(n, dev, fmt, ...) do { \
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if (npe_debug >= n) printf(fmt, __VA_ARGS__); \
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} while (0)
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static int npe_checkbits(struct ixpnpe_softc *, uint32_t reg, uint32_t);
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static int npe_isstopped(struct ixpnpe_softc *);
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static int npe_load_ins(struct ixpnpe_softc *,
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const IxNpeDlNpeMgrCodeBlock *bp, int verify);
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static int npe_load_data(struct ixpnpe_softc *,
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const IxNpeDlNpeMgrCodeBlock *bp, int verify);
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static int npe_load_stateinfo(struct ixpnpe_softc *,
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const IxNpeDlNpeMgrStateInfoBlock *bp, int verify);
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static int npe_load_image(struct ixpnpe_softc *,
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const uint32_t *imageCodePtr, int verify);
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static int npe_cpu_reset(struct ixpnpe_softc *);
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static int npe_cpu_start(struct ixpnpe_softc *);
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static int npe_cpu_stop(struct ixpnpe_softc *);
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static void npe_cmd_issue_write(struct ixpnpe_softc *,
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uint32_t cmd, uint32_t addr, uint32_t data);
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static uint32_t npe_cmd_issue_read(struct ixpnpe_softc *,
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uint32_t cmd, uint32_t addr);
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static int npe_ins_write(struct ixpnpe_softc *,
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uint32_t addr, uint32_t data, int verify);
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static int npe_data_write(struct ixpnpe_softc *,
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uint32_t addr, uint32_t data, int verify);
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static void npe_ecs_reg_write(struct ixpnpe_softc *,
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uint32_t reg, uint32_t data);
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static uint32_t npe_ecs_reg_read(struct ixpnpe_softc *, uint32_t reg);
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static void npe_issue_cmd(struct ixpnpe_softc *, uint32_t command);
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static void npe_cpu_step_save(struct ixpnpe_softc *);
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static int npe_cpu_step(struct ixpnpe_softc *, uint32_t npeInstruction,
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uint32_t ctxtNum, uint32_t ldur);
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static void npe_cpu_step_restore(struct ixpnpe_softc *);
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static int npe_logical_reg_read(struct ixpnpe_softc *,
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uint32_t regAddr, uint32_t regSize,
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uint32_t ctxtNum, uint32_t *regVal);
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static int npe_logical_reg_write(struct ixpnpe_softc *,
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uint32_t regAddr, uint32_t regVal,
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uint32_t regSize, uint32_t ctxtNum, int verify);
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static int npe_physical_reg_write(struct ixpnpe_softc *,
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uint32_t regAddr, uint32_t regValue, int verify);
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static int npe_ctx_reg_write(struct ixpnpe_softc *, uint32_t ctxtNum,
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uint32_t ctxtReg, uint32_t ctxtRegVal, int verify);
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static void ixpnpe_intr(void *arg);
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static uint32_t
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npe_reg_read(struct ixpnpe_softc *sc, bus_size_t off)
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{
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uint32_t v = bus_space_read_4(sc->sc_iot, sc->sc_ioh, off);
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DPRINTFn(9, sc->sc_dev, "%s(0x%lx) => 0x%x\n", __func__, off, v);
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return v;
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}
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static void
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npe_reg_write(struct ixpnpe_softc *sc, bus_size_t off, uint32_t val)
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{
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DPRINTFn(9, sc->sc_dev, "%s(0x%lx, 0x%x)\n", __func__, off, val);
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, off, val);
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}
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struct ixpnpe_softc *
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ixpnpe_attach(device_t dev, int npeid)
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{
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struct npeconfig {
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uint32_t base;
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uint32_t size;
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int irq;
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uint32_t ins_memsize;
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uint32_t data_memsize;
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};
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static const struct npeconfig npeconfigs[NPE_MAX] = {
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[NPE_A] = {
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.base = IXP425_NPE_A_HWBASE,
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.size = IXP425_NPE_A_SIZE,
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.irq = IXP425_INT_NPE_A,
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.ins_memsize = IX_NPEDL_INS_MEMSIZE_WORDS_NPEA,
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.data_memsize = IX_NPEDL_DATA_MEMSIZE_WORDS_NPEA
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},
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[NPE_B] = {
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.base = IXP425_NPE_B_HWBASE,
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.size = IXP425_NPE_B_SIZE,
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.irq = IXP425_INT_NPE_B,
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.ins_memsize = IX_NPEDL_INS_MEMSIZE_WORDS_NPEB,
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.data_memsize = IX_NPEDL_DATA_MEMSIZE_WORDS_NPEB
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},
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[NPE_C] = {
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.base = IXP425_NPE_C_HWBASE,
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.size = IXP425_NPE_C_SIZE,
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.irq = IXP425_INT_NPE_C,
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.ins_memsize = IX_NPEDL_INS_MEMSIZE_WORDS_NPEC,
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.data_memsize = IX_NPEDL_DATA_MEMSIZE_WORDS_NPEC
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},
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};
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struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
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struct ixpnpe_softc *sc;
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const struct npeconfig *config;
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int rid;
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if (npeid >= NPE_MAX) {
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device_printf(dev, "%s: bad npeid %d\n", __func__, npeid);
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return NULL;
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}
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sc = npes[npeid];
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if (sc != NULL) {
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sc->sc_nrefs++;
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return sc;
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}
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config = &npeconfigs[npeid];
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/* XXX M_BUS */
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sc = malloc(sizeof(struct ixpnpe_softc), M_TEMP, M_WAITOK | M_ZERO);
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sc->sc_dev = dev;
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sc->sc_iot = sa->sc_iot;
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mtx_init(&sc->sc_mtx, device_get_nameunit(dev), "npe driver", MTX_DEF);
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sc->sc_npeid = npeid;
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sc->sc_nrefs = 1;
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sc->sc_size = config->size;
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if (cpu_is_ixp42x()) {
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/* NB: instruction/data memory sizes are NPE-dependent */
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sc->insMemSize = config->ins_memsize;
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sc->dataMemSize = config->data_memsize;
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} else {
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sc->insMemSize = IXP46X_NPEDL_INS_MEMSIZE_WORDS;
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sc->dataMemSize = IXP46X_NPEDL_DATA_MEMSIZE_WORDS;
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}
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if (bus_space_map(sc->sc_iot, config->base, sc->sc_size, 0, &sc->sc_ioh))
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panic("%s: Cannot map registers", device_get_name(dev));
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/*
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* Setup IRQ and handler for NPE message support.
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*/
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rid = 0;
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sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
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config->irq, config->irq, 1, RF_ACTIVE);
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if (sc->sc_irq == NULL)
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panic("%s: Unable to allocate irq %u", device_get_name(dev),
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config->irq);
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/* XXX could be a source of entropy */
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bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_NET | INTR_MPSAFE,
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NULL, ixpnpe_intr, sc, &sc->sc_ih);
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/*
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* Enable output fifo interrupts (NB: must also set OFIFO Write Enable)
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*/
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npe_reg_write(sc, IX_NPECTL,
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npe_reg_read(sc, IX_NPECTL) | (IX_NPECTL_OFE | IX_NPECTL_OFWE));
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npes[npeid] = sc;
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return sc;
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}
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void
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ixpnpe_detach(struct ixpnpe_softc *sc)
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{
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if (--sc->sc_nrefs == 0) {
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npes[sc->sc_npeid] = NULL;
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/* disable output fifo interrupts */
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npe_reg_write(sc, IX_NPECTL,
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npe_reg_read(sc, IX_NPECTL) &~ (IX_NPECTL_OFE | IX_NPECTL_OFWE));
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bus_teardown_intr(sc->sc_dev, sc->sc_irq, sc->sc_ih);
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bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size);
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mtx_destroy(&sc->sc_mtx);
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free(sc, M_TEMP);
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}
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}
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int
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ixpnpe_stopandreset(struct ixpnpe_softc *sc)
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{
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int error;
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mtx_lock(&sc->sc_mtx);
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error = npe_cpu_stop(sc); /* stop NPE */
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if (error == 0)
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error = npe_cpu_reset(sc); /* reset it */
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if (error == 0)
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sc->started = 0; /* mark stopped */
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mtx_unlock(&sc->sc_mtx);
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DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
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return error;
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}
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static int
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ixpnpe_start_locked(struct ixpnpe_softc *sc)
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{
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int error;
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if (!sc->started) {
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error = npe_cpu_start(sc);
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if (error == 0)
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sc->started = 1;
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} else
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error = 0;
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DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
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return error;
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}
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int
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ixpnpe_start(struct ixpnpe_softc *sc)
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{
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int ret;
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mtx_lock(&sc->sc_mtx);
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ret = ixpnpe_start_locked(sc);
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mtx_unlock(&sc->sc_mtx);
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return (ret);
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}
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int
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ixpnpe_stop(struct ixpnpe_softc *sc)
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{
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int error;
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mtx_lock(&sc->sc_mtx);
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error = npe_cpu_stop(sc);
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if (error == 0)
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sc->started = 0;
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mtx_unlock(&sc->sc_mtx);
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DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
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return error;
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}
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/*
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* Indicates the start of an NPE Image, in new NPE Image Library format.
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* 2 consecutive occurrences indicates the end of the NPE Image Library
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*/
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#define NPE_IMAGE_MARKER 0xfeedf00d
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/*
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* NPE Image Header definition, used in new NPE Image Library format
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*/
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typedef struct {
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uint32_t marker;
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uint32_t id;
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uint32_t size;
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} IxNpeDlImageMgrImageHeader;
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static int
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npe_findimage(struct ixpnpe_softc *sc,
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const uint32_t *imageLibrary, uint32_t imageId,
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const uint32_t **imagePtr, uint32_t *imageSize)
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{
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const IxNpeDlImageMgrImageHeader *image;
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uint32_t offset = 0;
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while (imageLibrary[offset] == NPE_IMAGE_MARKER) {
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image = (const IxNpeDlImageMgrImageHeader *)
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&imageLibrary[offset];
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offset += sizeof(IxNpeDlImageMgrImageHeader)/sizeof(uint32_t);
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|
|
DPRINTF(sc->sc_dev, "%s: off %u mark 0x%x id 0x%x size %u\n",
|
|
__func__, offset, image->marker, image->id, image->size);
|
|
if (image->id == imageId) {
|
|
*imagePtr = imageLibrary + offset;
|
|
*imageSize = image->size;
|
|
return 0;
|
|
}
|
|
/* 2 consecutive NPE_IMAGE_MARKER's indicates end of library */
|
|
if (image->id == NPE_IMAGE_MARKER) {
|
|
DPRINTF(sc->sc_dev, "imageId 0x%08x not found in "
|
|
"image library header\n", imageId);
|
|
/* reached end of library, image not found */
|
|
return ESRCH;
|
|
}
|
|
offset += image->size;
|
|
}
|
|
return ESRCH;
|
|
}
|
|
|
|
static int
|
|
ixpnpe_load_firmware(struct ixpnpe_softc *sc, const char *imageName,
|
|
uint32_t imageId)
|
|
{
|
|
static const char *devname[4] =
|
|
{ "IXP425", "IXP435/IXP465", "DeviceID#2", "DeviceID#3" };
|
|
uint32_t imageSize;
|
|
const uint32_t *imageCodePtr;
|
|
const struct firmware *fw;
|
|
int error;
|
|
|
|
DPRINTF(sc->sc_dev, "load %s, imageId 0x%08x\n", imageName, imageId);
|
|
|
|
#if 0
|
|
IxFeatureCtrlDeviceId devid = IX_NPEDL_DEVICEID_FROM_IMAGEID_GET(imageId);
|
|
/*
|
|
* Checking if image being loaded is meant for device that is running.
|
|
* Image is forward compatible. i.e Image built for IXP42X should run
|
|
* on IXP46X but not vice versa.
|
|
*/
|
|
if (devid > (ixFeatureCtrlDeviceRead() & IX_FEATURE_CTRL_DEVICE_TYPE_MASK))
|
|
return EINVAL;
|
|
#endif
|
|
error = ixpnpe_stopandreset(sc); /* stop and reset the NPE */
|
|
if (error != 0)
|
|
return error;
|
|
|
|
fw = firmware_get(imageName);
|
|
if (fw == NULL)
|
|
return ENOENT;
|
|
|
|
/* Locate desired image in files w/ combined images */
|
|
error = npe_findimage(sc, fw->data, imageId, &imageCodePtr, &imageSize);
|
|
if (error != 0)
|
|
goto done;
|
|
|
|
device_printf(sc->sc_dev,
|
|
"load fw image %s.NPE-%c Func 0x%x Rev %u.%u\n",
|
|
devname[NPEIMAGE_DEVID(imageId)], 'A' + NPEIMAGE_NPEID(imageId),
|
|
NPEIMAGE_FUNCID(imageId), NPEIMAGE_MAJOR(imageId),
|
|
NPEIMAGE_MINOR(imageId));
|
|
|
|
/*
|
|
* If download was successful, store image Id in list of
|
|
* currently loaded images. If a critical error occurred
|
|
* during download, record that the NPE has an invalid image
|
|
*/
|
|
mtx_lock(&sc->sc_mtx);
|
|
error = npe_load_image(sc, imageCodePtr, 1 /*VERIFY*/);
|
|
if (error == 0) {
|
|
sc->validImage = 1;
|
|
error = ixpnpe_start_locked(sc);
|
|
} else {
|
|
sc->validImage = 0;
|
|
}
|
|
sc->functionalityId = IX_NPEDL_FUNCTIONID_FROM_IMAGEID_GET(imageId);
|
|
mtx_unlock(&sc->sc_mtx);
|
|
done:
|
|
firmware_put(fw, FIRMWARE_UNLOAD);
|
|
DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
override_imageid(device_t dev, const char *resname, uint32_t *val)
|
|
{
|
|
int unit = device_get_unit(dev);
|
|
int resval;
|
|
|
|
if (resource_int_value("npe", unit, resname, &resval) != 0)
|
|
return 0;
|
|
/* XXX validate */
|
|
if (bootverbose)
|
|
device_printf(dev, "using npe.%d.%s=0x%x override\n",
|
|
unit, resname, resval);
|
|
*val = resval;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
ixpnpe_init(struct ixpnpe_softc *sc)
|
|
{
|
|
static const uint32_t npeconfig[NPE_MAX] = {
|
|
[NPE_A] = IXP425_NPE_A_IMAGEID,
|
|
[NPE_B] = IXP425_NPE_B_IMAGEID,
|
|
[NPE_C] = IXP425_NPE_C_IMAGEID,
|
|
};
|
|
uint32_t imageid, msg[2];
|
|
int error;
|
|
|
|
if (sc->started)
|
|
return 0;
|
|
/*
|
|
* Load NPE firmware and start it running. We assume
|
|
* that minor version bumps remain compatible so probe
|
|
* the firmware image starting with the expected version
|
|
* and then bump the minor version up to the max.
|
|
*/
|
|
if (!override_imageid(sc->sc_dev, "imageid", &imageid))
|
|
imageid = npeconfig[sc->sc_npeid];
|
|
for (;;) {
|
|
error = ixpnpe_load_firmware(sc, "npe_fw", imageid);
|
|
if (error == 0)
|
|
break;
|
|
/*
|
|
* ESRCH is returned when the requested image
|
|
* is not present
|
|
*/
|
|
if (error != ESRCH) {
|
|
device_printf(sc->sc_dev,
|
|
"cannot init NPE (error %d)\n", error);
|
|
return error;
|
|
}
|
|
/* bump the minor version up to the max possible */
|
|
if (NPEIMAGE_MINOR(imageid) == 0xff) {
|
|
device_printf(sc->sc_dev, "cannot locate firmware "
|
|
"(imageid 0x%08x)\n", imageid);
|
|
return error;
|
|
}
|
|
imageid++;
|
|
}
|
|
/* NB: firmware should respond with a status msg */
|
|
if (ixpnpe_recvmsg_sync(sc, msg) != 0) {
|
|
device_printf(sc->sc_dev,
|
|
"firmware did not respond as expected\n");
|
|
return EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
ixpnpe_getfunctionality(struct ixpnpe_softc *sc)
|
|
{
|
|
return (sc->validImage ? sc->functionalityId : 0);
|
|
}
|
|
|
|
static int
|
|
npe_checkbits(struct ixpnpe_softc *sc, uint32_t reg, uint32_t expectedBitsSet)
|
|
{
|
|
uint32_t val;
|
|
|
|
val = npe_reg_read(sc, reg);
|
|
DPRINTFn(5, sc->sc_dev, "%s(0x%x, 0x%x) => 0x%x (%u)\n",
|
|
__func__, reg, expectedBitsSet, val,
|
|
(val & expectedBitsSet) == expectedBitsSet);
|
|
return ((val & expectedBitsSet) == expectedBitsSet);
|
|
}
|
|
|
|
static int
|
|
npe_isstopped(struct ixpnpe_softc *sc)
|
|
{
|
|
return npe_checkbits(sc,
|
|
IX_NPEDL_REG_OFFSET_EXCTL, IX_NPEDL_EXCTL_STATUS_STOP);
|
|
}
|
|
|
|
static int
|
|
npe_load_ins(struct ixpnpe_softc *sc,
|
|
const IxNpeDlNpeMgrCodeBlock *bp, int verify)
|
|
{
|
|
uint32_t npeMemAddress;
|
|
int i, blockSize;
|
|
|
|
npeMemAddress = bp->npeMemAddress;
|
|
blockSize = bp->size; /* NB: instruction/data count */
|
|
if (npeMemAddress + blockSize > sc->insMemSize) {
|
|
device_printf(sc->sc_dev,
|
|
"Block size %u too big for NPE memory\n", blockSize);
|
|
return EINVAL; /* XXX */
|
|
}
|
|
for (i = 0; i < blockSize; i++, npeMemAddress++) {
|
|
if (npe_ins_write(sc, npeMemAddress, bp->data[i], verify) != 0) {
|
|
device_printf(sc->sc_dev,
|
|
"NPE instruction write failed");
|
|
return EIO;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
npe_load_data(struct ixpnpe_softc *sc,
|
|
const IxNpeDlNpeMgrCodeBlock *bp, int verify)
|
|
{
|
|
uint32_t npeMemAddress;
|
|
int i, blockSize;
|
|
|
|
npeMemAddress = bp->npeMemAddress;
|
|
blockSize = bp->size; /* NB: instruction/data count */
|
|
if (npeMemAddress + blockSize > sc->dataMemSize) {
|
|
device_printf(sc->sc_dev,
|
|
"Block size %u too big for NPE memory\n", blockSize);
|
|
return EINVAL;
|
|
}
|
|
for (i = 0; i < blockSize; i++, npeMemAddress++) {
|
|
if (npe_data_write(sc, npeMemAddress, bp->data[i], verify) != 0) {
|
|
device_printf(sc->sc_dev, "NPE data write failed\n");
|
|
return EIO;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
npe_load_stateinfo(struct ixpnpe_softc *sc,
|
|
const IxNpeDlNpeMgrStateInfoBlock *bp, int verify)
|
|
{
|
|
int i, nentries, error;
|
|
|
|
npe_cpu_step_save(sc);
|
|
|
|
/* for each state-info context register entry in block */
|
|
nentries = bp->size / IX_NPEDL_STATE_INFO_ENTRY_SIZE;
|
|
error = 0;
|
|
for (i = 0; i < nentries; i++) {
|
|
/* each state-info entry is 2 words (address, value) */
|
|
uint32_t regVal = bp->ctxtRegEntry[i].value;
|
|
uint32_t addrInfo = bp->ctxtRegEntry[i].addressInfo;
|
|
|
|
uint32_t reg = (addrInfo & IX_NPEDL_MASK_STATE_ADDR_CTXT_REG);
|
|
uint32_t cNum = (addrInfo & IX_NPEDL_MASK_STATE_ADDR_CTXT_NUM) >>
|
|
IX_NPEDL_OFFSET_STATE_ADDR_CTXT_NUM;
|
|
|
|
/* error-check Context Register No. and Context Number values */
|
|
if (!(0 <= reg && reg < IX_NPEDL_CTXT_REG_MAX)) {
|
|
device_printf(sc->sc_dev,
|
|
"invalid Context Register %u\n", reg);
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (!(0 <= cNum && cNum < IX_NPEDL_CTXT_NUM_MAX)) {
|
|
device_printf(sc->sc_dev,
|
|
"invalid Context Number %u\n", cNum);
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
/* NOTE that there is no STEVT register for Context 0 */
|
|
if (cNum == 0 && reg == IX_NPEDL_CTXT_REG_STEVT) {
|
|
device_printf(sc->sc_dev,
|
|
"no STEVT for Context 0\n");
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (npe_ctx_reg_write(sc, cNum, reg, regVal, verify) != 0) {
|
|
device_printf(sc->sc_dev,
|
|
"write of state-info to NPE failed\n");
|
|
error = EIO;
|
|
break;
|
|
}
|
|
}
|
|
|
|
npe_cpu_step_restore(sc);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
npe_load_image(struct ixpnpe_softc *sc,
|
|
const uint32_t *imageCodePtr, int verify)
|
|
{
|
|
#define EOM(marker) ((marker) == IX_NPEDL_END_OF_DOWNLOAD_MAP)
|
|
const IxNpeDlNpeMgrDownloadMap *downloadMap;
|
|
int i, error;
|
|
|
|
if (!npe_isstopped(sc)) { /* verify NPE is stopped */
|
|
device_printf(sc->sc_dev,
|
|
"cannot load image, NPE not stopped\n");
|
|
return EIO;
|
|
}
|
|
|
|
/*
|
|
* Read Download Map, checking each block type and calling
|
|
* appropriate function to perform download
|
|
*/
|
|
error = 0;
|
|
downloadMap = (const IxNpeDlNpeMgrDownloadMap *) imageCodePtr;
|
|
for (i = 0; !EOM(downloadMap->entry[i].eodmMarker); i++) {
|
|
/* calculate pointer to block to be downloaded */
|
|
const uint32_t *bp = imageCodePtr +
|
|
downloadMap->entry[i].block.offset;
|
|
switch (downloadMap->entry[i].block.type) {
|
|
case IX_NPEDL_BLOCK_TYPE_INSTRUCTION:
|
|
error = npe_load_ins(sc,
|
|
(const IxNpeDlNpeMgrCodeBlock *) bp, verify);
|
|
DPRINTF(sc->sc_dev, "%s: inst, error %d\n",
|
|
__func__, error);
|
|
break;
|
|
case IX_NPEDL_BLOCK_TYPE_DATA:
|
|
error = npe_load_data(sc,
|
|
(const IxNpeDlNpeMgrCodeBlock *) bp, verify);
|
|
DPRINTF(sc->sc_dev, "%s: data, error %d\n",
|
|
__func__, error);
|
|
break;
|
|
case IX_NPEDL_BLOCK_TYPE_STATE:
|
|
error = npe_load_stateinfo(sc,
|
|
(const IxNpeDlNpeMgrStateInfoBlock *) bp, verify);
|
|
DPRINTF(sc->sc_dev, "%s: state, error %d\n",
|
|
__func__, error);
|
|
break;
|
|
default:
|
|
device_printf(sc->sc_dev,
|
|
"unknown block type 0x%x in download map\n",
|
|
downloadMap->entry[i].block.type);
|
|
error = EIO; /* XXX */
|
|
break;
|
|
}
|
|
if (error != 0)
|
|
break;
|
|
}
|
|
return error;
|
|
#undef EOM
|
|
}
|
|
|
|
/* contains Reset values for Context Store Registers */
|
|
static const struct {
|
|
uint32_t regAddr;
|
|
uint32_t regResetVal;
|
|
} ixNpeDlEcsRegResetValues[] = {
|
|
{ IX_NPEDL_ECS_BG_CTXT_REG_0, IX_NPEDL_ECS_BG_CTXT_REG_0_RESET },
|
|
{ IX_NPEDL_ECS_BG_CTXT_REG_1, IX_NPEDL_ECS_BG_CTXT_REG_1_RESET },
|
|
{ IX_NPEDL_ECS_BG_CTXT_REG_2, IX_NPEDL_ECS_BG_CTXT_REG_2_RESET },
|
|
{ IX_NPEDL_ECS_PRI_1_CTXT_REG_0, IX_NPEDL_ECS_PRI_1_CTXT_REG_0_RESET },
|
|
{ IX_NPEDL_ECS_PRI_1_CTXT_REG_1, IX_NPEDL_ECS_PRI_1_CTXT_REG_1_RESET },
|
|
{ IX_NPEDL_ECS_PRI_1_CTXT_REG_2, IX_NPEDL_ECS_PRI_1_CTXT_REG_2_RESET },
|
|
{ IX_NPEDL_ECS_PRI_2_CTXT_REG_0, IX_NPEDL_ECS_PRI_2_CTXT_REG_0_RESET },
|
|
{ IX_NPEDL_ECS_PRI_2_CTXT_REG_1, IX_NPEDL_ECS_PRI_2_CTXT_REG_1_RESET },
|
|
{ IX_NPEDL_ECS_PRI_2_CTXT_REG_2, IX_NPEDL_ECS_PRI_2_CTXT_REG_2_RESET },
|
|
{ IX_NPEDL_ECS_DBG_CTXT_REG_0, IX_NPEDL_ECS_DBG_CTXT_REG_0_RESET },
|
|
{ IX_NPEDL_ECS_DBG_CTXT_REG_1, IX_NPEDL_ECS_DBG_CTXT_REG_1_RESET },
|
|
{ IX_NPEDL_ECS_DBG_CTXT_REG_2, IX_NPEDL_ECS_DBG_CTXT_REG_2_RESET },
|
|
{ IX_NPEDL_ECS_INSTRUCT_REG, IX_NPEDL_ECS_INSTRUCT_REG_RESET }
|
|
};
|
|
|
|
/* contains Reset values for Context Store Registers */
|
|
static const uint32_t ixNpeDlCtxtRegResetValues[] = {
|
|
IX_NPEDL_CTXT_REG_RESET_STEVT,
|
|
IX_NPEDL_CTXT_REG_RESET_STARTPC,
|
|
IX_NPEDL_CTXT_REG_RESET_REGMAP,
|
|
IX_NPEDL_CTXT_REG_RESET_CINDEX,
|
|
};
|
|
|
|
#define IX_NPEDL_PARITY_BIT_MASK 0x3F00FFFF
|
|
#define IX_NPEDL_CONFIG_CTRL_REG_MASK 0x3F3FFFFF
|
|
|
|
#if 0
|
|
/*
|
|
* Reset the NPE and its coprocessor using the
|
|
* fuse bits in the feature control register.
|
|
*/
|
|
static void
|
|
npe_reset(int npeid)
|
|
{
|
|
uint32_t mask = EXP_FCTRL_NPEA << npeid;
|
|
uint32_t v;
|
|
|
|
v = ixp4xx_read_feature_bits();
|
|
ixp4xx_write_feature_bits(v &~ mask);
|
|
/* un-fuse and un-reset the NPE & coprocessor */
|
|
ixp4xx_write_feature_bits(v | mask);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
npe_cpu_reset(struct ixpnpe_softc *sc)
|
|
{
|
|
#define N(a) (sizeof(a) / sizeof(a[0]))
|
|
uint32_t ctxtReg; /* identifies Context Store reg (0-3) */
|
|
uint32_t regAddr;
|
|
uint32_t regVal;
|
|
uint32_t ixNpeConfigCtrlRegVal;
|
|
int i, error = 0;
|
|
|
|
/* pre-store the NPE Config Control Register Value */
|
|
ixNpeConfigCtrlRegVal = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_CTL);
|
|
ixNpeConfigCtrlRegVal |= 0x3F000000;
|
|
|
|
/* disable the parity interrupt */
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_CTL,
|
|
(ixNpeConfigCtrlRegVal & IX_NPEDL_PARITY_BIT_MASK));
|
|
DPRINTFn(2, sc->sc_dev, "%s: dis parity int, CTL => 0x%x\n",
|
|
__func__, ixNpeConfigCtrlRegVal & IX_NPEDL_PARITY_BIT_MASK);
|
|
|
|
npe_cpu_step_save(sc);
|
|
|
|
/*
|
|
* Clear the FIFOs.
|
|
*/
|
|
while (npe_checkbits(sc,
|
|
IX_NPEDL_REG_OFFSET_WFIFO, IX_NPEDL_MASK_WFIFO_VALID)) {
|
|
/* read from the Watch-point FIFO until empty */
|
|
(void) npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WFIFO);
|
|
}
|
|
|
|
while (npe_checkbits(sc,
|
|
IX_NPEDL_REG_OFFSET_STAT, IX_NPEDL_MASK_STAT_OFNE)) {
|
|
/* read from the outFIFO until empty */
|
|
(void) npe_reg_read(sc, IX_NPEDL_REG_OFFSET_FIFO);
|
|
}
|
|
|
|
while (npe_checkbits(sc,
|
|
IX_NPEDL_REG_OFFSET_STAT, IX_NPEDL_MASK_STAT_IFNE)) {
|
|
/*
|
|
* Step execution of the NPE instruction to read inFIFO using
|
|
* the Debug Executing Context stack.
|
|
*/
|
|
error = npe_cpu_step(sc, IX_NPEDL_INSTR_RD_FIFO, 0, 0);
|
|
if (error != 0) {
|
|
DPRINTF(sc->sc_dev, "%s: cannot step (1), error %u\n",
|
|
__func__, error);
|
|
npe_cpu_step_restore(sc);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Reset the mailbox reg
|
|
*/
|
|
/* ...from XScale side */
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_MBST, IX_NPEDL_REG_RESET_MBST);
|
|
/* ...from NPE side */
|
|
error = npe_cpu_step(sc, IX_NPEDL_INSTR_RESET_MBOX, 0, 0);
|
|
if (error != 0) {
|
|
DPRINTF(sc->sc_dev, "%s: cannot step (2), error %u\n",
|
|
__func__, error);
|
|
npe_cpu_step_restore(sc);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Reset the physical registers in the NPE register file:
|
|
* Note: no need to save/restore REGMAP for Context 0 here
|
|
* since all Context Store regs are reset in subsequent code.
|
|
*/
|
|
for (regAddr = 0;
|
|
regAddr < IX_NPEDL_TOTAL_NUM_PHYS_REG && error == 0;
|
|
regAddr++) {
|
|
/* for each physical register in the NPE reg file, write 0 : */
|
|
error = npe_physical_reg_write(sc, regAddr, 0, TRUE);
|
|
if (error != 0) {
|
|
DPRINTF(sc->sc_dev, "%s: cannot write phy reg,"
|
|
"error %u\n", __func__, error);
|
|
npe_cpu_step_restore(sc);
|
|
return error; /* abort reset */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Reset the context store:
|
|
*/
|
|
for (i = IX_NPEDL_CTXT_NUM_MIN; i <= IX_NPEDL_CTXT_NUM_MAX; i++) {
|
|
/* set each context's Context Store registers to reset values */
|
|
for (ctxtReg = 0; ctxtReg < IX_NPEDL_CTXT_REG_MAX; ctxtReg++) {
|
|
/* NOTE that there is no STEVT register for Context 0 */
|
|
if (i == 0 && ctxtReg == IX_NPEDL_CTXT_REG_STEVT)
|
|
continue;
|
|
regVal = ixNpeDlCtxtRegResetValues[ctxtReg];
|
|
error = npe_ctx_reg_write(sc, i, ctxtReg,
|
|
regVal, TRUE);
|
|
if (error != 0) {
|
|
DPRINTF(sc->sc_dev, "%s: cannot write ctx reg,"
|
|
"error %u\n", __func__, error);
|
|
npe_cpu_step_restore(sc);
|
|
return error; /* abort reset */
|
|
}
|
|
}
|
|
}
|
|
|
|
npe_cpu_step_restore(sc);
|
|
|
|
/* write Reset values to Execution Context Stack registers */
|
|
for (i = 0; i < N(ixNpeDlEcsRegResetValues); i++)
|
|
npe_ecs_reg_write(sc,
|
|
ixNpeDlEcsRegResetValues[i].regAddr,
|
|
ixNpeDlEcsRegResetValues[i].regResetVal);
|
|
|
|
/* clear the profile counter */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_CLR_PROFILE_CNT);
|
|
|
|
/* clear registers EXCT, AP0, AP1, AP2 and AP3 */
|
|
for (regAddr = IX_NPEDL_REG_OFFSET_EXCT;
|
|
regAddr <= IX_NPEDL_REG_OFFSET_AP3;
|
|
regAddr += sizeof(uint32_t))
|
|
npe_reg_write(sc, regAddr, 0);
|
|
|
|
/* Reset the Watch-count register */
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_WC, 0);
|
|
#if 0
|
|
/*
|
|
* WR IXA00055043 - Remove IMEM Parity Introduced by NPE Reset Operation
|
|
* XXX Removed because it breaks IXP435 operation; e.g. on Gateworks
|
|
* XXX 2358 boards reseting NPE-A after NPE-C is running causes both
|
|
* XXX npe's to stop working
|
|
*/
|
|
npe_reset(sc->sc_npeid);
|
|
#endif
|
|
/*
|
|
* Call NpeMgr function to stop the NPE again after the Feature Control
|
|
* has unfused and Un-Reset the NPE and its associated Coprocessors.
|
|
*/
|
|
error = npe_cpu_stop(sc);
|
|
|
|
/* restore NPE configuration bus Control Register - Parity Settings */
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_CTL,
|
|
(ixNpeConfigCtrlRegVal & IX_NPEDL_CONFIG_CTRL_REG_MASK));
|
|
DPRINTFn(2, sc->sc_dev, "%s: restore CTL => 0x%x\n",
|
|
__func__, npe_reg_read(sc, IX_NPEDL_REG_OFFSET_CTL));
|
|
|
|
return error;
|
|
#undef N
|
|
}
|
|
|
|
static int
|
|
npe_cpu_start(struct ixpnpe_softc *sc)
|
|
{
|
|
uint32_t ecsRegVal;
|
|
|
|
/*
|
|
* Ensure only Background Context Stack Level is Active by turning off
|
|
* the Active bit in each of the other Executing Context Stack levels.
|
|
*/
|
|
ecsRegVal = npe_ecs_reg_read(sc, IX_NPEDL_ECS_PRI_1_CTXT_REG_0);
|
|
ecsRegVal &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_PRI_1_CTXT_REG_0, ecsRegVal);
|
|
|
|
ecsRegVal = npe_ecs_reg_read(sc, IX_NPEDL_ECS_PRI_2_CTXT_REG_0);
|
|
ecsRegVal &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_PRI_2_CTXT_REG_0, ecsRegVal);
|
|
|
|
ecsRegVal = npe_ecs_reg_read(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0);
|
|
ecsRegVal &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0, ecsRegVal);
|
|
|
|
/* clear the pipeline */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
|
|
|
|
/* start NPE execution by issuing cmd through EXCTL register on NPE */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_START);
|
|
|
|
/*
|
|
* Check execution status of NPE to verify operation was successful.
|
|
*/
|
|
return npe_checkbits(sc,
|
|
IX_NPEDL_REG_OFFSET_EXCTL, IX_NPEDL_EXCTL_STATUS_RUN) ? 0 : EIO;
|
|
}
|
|
|
|
static int
|
|
npe_cpu_stop(struct ixpnpe_softc *sc)
|
|
{
|
|
/* stop NPE execution by issuing cmd through EXCTL register on NPE */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_STOP);
|
|
|
|
/* verify that NPE Stop was successful */
|
|
return npe_checkbits(sc,
|
|
IX_NPEDL_REG_OFFSET_EXCTL, IX_NPEDL_EXCTL_STATUS_STOP) ? 0 : EIO;
|
|
}
|
|
|
|
#define IX_NPEDL_REG_SIZE_BYTE 8
|
|
#define IX_NPEDL_REG_SIZE_SHORT 16
|
|
#define IX_NPEDL_REG_SIZE_WORD 32
|
|
|
|
/*
|
|
* Introduce extra read cycles after issuing read command to NPE
|
|
* so that we read the register after the NPE has updated it
|
|
* This is to overcome race condition between XScale and NPE
|
|
*/
|
|
#define IX_NPEDL_DELAY_READ_CYCLES 2
|
|
/*
|
|
* To mask top three MSBs of 32bit word to download into NPE IMEM
|
|
*/
|
|
#define IX_NPEDL_MASK_UNUSED_IMEM_BITS 0x1FFFFFFF;
|
|
|
|
static void
|
|
npe_cmd_issue_write(struct ixpnpe_softc *sc,
|
|
uint32_t cmd, uint32_t addr, uint32_t data)
|
|
{
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXDATA, data);
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXAD, addr);
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
|
|
}
|
|
|
|
static uint32_t
|
|
npe_cmd_issue_read(struct ixpnpe_softc *sc, uint32_t cmd, uint32_t addr)
|
|
{
|
|
uint32_t data;
|
|
int i;
|
|
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXAD, addr);
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
|
|
for (i = 0; i <= IX_NPEDL_DELAY_READ_CYCLES; i++)
|
|
data = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_EXDATA);
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
npe_ins_write(struct ixpnpe_softc *sc, uint32_t addr, uint32_t data, int verify)
|
|
{
|
|
DPRINTFn(4, sc->sc_dev, "%s(0x%x, 0x%x)\n", __func__, addr, data);
|
|
npe_cmd_issue_write(sc, IX_NPEDL_EXCTL_CMD_WR_INS_MEM, addr, data);
|
|
if (verify) {
|
|
uint32_t rdata;
|
|
|
|
/*
|
|
* Write invalid data to this reg, so we can see if we're
|
|
* reading the EXDATA register too early.
|
|
*/
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXDATA, ~data);
|
|
|
|
/*
|
|
* Disabled since top 3 MSB are not used for Azusa
|
|
* hardware Refer WR:IXA00053900
|
|
*/
|
|
data &= IX_NPEDL_MASK_UNUSED_IMEM_BITS;
|
|
|
|
rdata = npe_cmd_issue_read(sc, IX_NPEDL_EXCTL_CMD_RD_INS_MEM,
|
|
addr);
|
|
rdata &= IX_NPEDL_MASK_UNUSED_IMEM_BITS;
|
|
|
|
if (data != rdata)
|
|
return EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
npe_data_write(struct ixpnpe_softc *sc, uint32_t addr, uint32_t data, int verify)
|
|
{
|
|
DPRINTFn(4, sc->sc_dev, "%s(0x%x, 0x%x)\n", __func__, addr, data);
|
|
npe_cmd_issue_write(sc, IX_NPEDL_EXCTL_CMD_WR_DATA_MEM, addr, data);
|
|
if (verify) {
|
|
/*
|
|
* Write invalid data to this reg, so we can see if we're
|
|
* reading the EXDATA register too early.
|
|
*/
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXDATA, ~data);
|
|
if (data != npe_cmd_issue_read(sc, IX_NPEDL_EXCTL_CMD_RD_DATA_MEM, addr))
|
|
return EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
npe_ecs_reg_write(struct ixpnpe_softc *sc, uint32_t reg, uint32_t data)
|
|
{
|
|
npe_cmd_issue_write(sc, IX_NPEDL_EXCTL_CMD_WR_ECS_REG, reg, data);
|
|
}
|
|
|
|
static uint32_t
|
|
npe_ecs_reg_read(struct ixpnpe_softc *sc, uint32_t reg)
|
|
{
|
|
return npe_cmd_issue_read(sc, IX_NPEDL_EXCTL_CMD_RD_ECS_REG, reg);
|
|
}
|
|
|
|
static void
|
|
npe_issue_cmd(struct ixpnpe_softc *sc, uint32_t command)
|
|
{
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCTL, command);
|
|
}
|
|
|
|
static void
|
|
npe_cpu_step_save(struct ixpnpe_softc *sc)
|
|
{
|
|
/* turn off the halt bit by clearing Execution Count register. */
|
|
/* save reg contents 1st and restore later */
|
|
sc->savedExecCount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_EXCT);
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCT, 0);
|
|
|
|
/* ensure that IF and IE are on (temporarily), so that we don't end up
|
|
* stepping forever */
|
|
sc->savedEcsDbgCtxtReg2 = npe_ecs_reg_read(sc,
|
|
IX_NPEDL_ECS_DBG_CTXT_REG_2);
|
|
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_2,
|
|
(sc->savedEcsDbgCtxtReg2 | IX_NPEDL_MASK_ECS_DBG_REG_2_IF |
|
|
IX_NPEDL_MASK_ECS_DBG_REG_2_IE));
|
|
}
|
|
|
|
static int
|
|
npe_cpu_step(struct ixpnpe_softc *sc, uint32_t npeInstruction,
|
|
uint32_t ctxtNum, uint32_t ldur)
|
|
{
|
|
#define IX_NPE_DL_MAX_NUM_OF_RETRIES 1000000
|
|
uint32_t ecsDbgRegVal;
|
|
uint32_t oldWatchcount, newWatchcount;
|
|
int tries;
|
|
|
|
/* set the Active bit, and the LDUR, in the debug level */
|
|
ecsDbgRegVal = IX_NPEDL_MASK_ECS_REG_0_ACTIVE |
|
|
(ldur << IX_NPEDL_OFFSET_ECS_REG_0_LDUR);
|
|
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0, ecsDbgRegVal);
|
|
|
|
/*
|
|
* Set CCTXT at ECS DEBUG L3 to specify in which context to execute the
|
|
* instruction, and set SELCTXT at ECS DEBUG Level to specify which
|
|
* context store to access.
|
|
* Debug ECS Level Reg 1 has form 0x000n000n, where n = context number
|
|
*/
|
|
ecsDbgRegVal = (ctxtNum << IX_NPEDL_OFFSET_ECS_REG_1_CCTXT) |
|
|
(ctxtNum << IX_NPEDL_OFFSET_ECS_REG_1_SELCTXT);
|
|
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_1, ecsDbgRegVal);
|
|
|
|
/* clear the pipeline */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
|
|
|
|
/* load NPE instruction into the instruction register */
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_INSTRUCT_REG, npeInstruction);
|
|
|
|
/* need this value later to wait for completion of NPE execution step */
|
|
oldWatchcount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WC);
|
|
|
|
/* issue a Step One command via the Execution Control register */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_STEP);
|
|
|
|
/*
|
|
* Force the XScale to wait until the NPE has finished execution step
|
|
* NOTE that this delay will be very small, just long enough to allow a
|
|
* single NPE instruction to complete execution; if instruction
|
|
* execution is not completed before timeout retries, exit the while
|
|
* loop.
|
|
*/
|
|
newWatchcount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WC);
|
|
for (tries = 0; tries < IX_NPE_DL_MAX_NUM_OF_RETRIES &&
|
|
newWatchcount == oldWatchcount; tries++) {
|
|
/* Watch Count register incr's when NPE completes an inst */
|
|
newWatchcount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WC);
|
|
}
|
|
return (tries < IX_NPE_DL_MAX_NUM_OF_RETRIES) ? 0 : EIO;
|
|
#undef IX_NPE_DL_MAX_NUM_OF_RETRIES
|
|
}
|
|
|
|
static void
|
|
npe_cpu_step_restore(struct ixpnpe_softc *sc)
|
|
{
|
|
/* clear active bit in debug level */
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0, 0);
|
|
|
|
/* clear the pipeline */
|
|
npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
|
|
|
|
/* restore Execution Count register contents. */
|
|
npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCT, sc->savedExecCount);
|
|
|
|
/* restore IF and IE bits to original values */
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_2, sc->savedEcsDbgCtxtReg2);
|
|
}
|
|
|
|
static int
|
|
npe_logical_reg_read(struct ixpnpe_softc *sc,
|
|
uint32_t regAddr, uint32_t regSize,
|
|
uint32_t ctxtNum, uint32_t *regVal)
|
|
{
|
|
uint32_t npeInstruction, mask;
|
|
int error;
|
|
|
|
switch (regSize) {
|
|
case IX_NPEDL_REG_SIZE_BYTE:
|
|
npeInstruction = IX_NPEDL_INSTR_RD_REG_BYTE;
|
|
mask = 0xff;
|
|
break;
|
|
case IX_NPEDL_REG_SIZE_SHORT:
|
|
npeInstruction = IX_NPEDL_INSTR_RD_REG_SHORT;
|
|
mask = 0xffff;
|
|
break;
|
|
case IX_NPEDL_REG_SIZE_WORD:
|
|
npeInstruction = IX_NPEDL_INSTR_RD_REG_WORD;
|
|
mask = 0xffffffff;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
/* make regAddr be the SRC and DEST operands (e.g. movX d0, d0) */
|
|
npeInstruction |= (regAddr << IX_NPEDL_OFFSET_INSTR_SRC) |
|
|
(regAddr << IX_NPEDL_OFFSET_INSTR_DEST);
|
|
|
|
/* step execution of NPE inst using Debug Executing Context stack */
|
|
error = npe_cpu_step(sc, npeInstruction, ctxtNum,
|
|
IX_NPEDL_RD_INSTR_LDUR);
|
|
if (error != 0) {
|
|
DPRINTF(sc->sc_dev, "%s(0x%x, %u, %u), cannot step, error %d\n",
|
|
__func__, regAddr, regSize, ctxtNum, error);
|
|
return error;
|
|
}
|
|
/* read value of register from Execution Data register */
|
|
*regVal = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_EXDATA);
|
|
|
|
/* align value from left to right */
|
|
*regVal = (*regVal >> (IX_NPEDL_REG_SIZE_WORD - regSize)) & mask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
npe_logical_reg_write(struct ixpnpe_softc *sc, uint32_t regAddr, uint32_t regVal,
|
|
uint32_t regSize, uint32_t ctxtNum, int verify)
|
|
{
|
|
int error;
|
|
|
|
DPRINTFn(4, sc->sc_dev, "%s(0x%x, 0x%x, %u, %u)\n",
|
|
__func__, regAddr, regVal, regSize, ctxtNum);
|
|
if (regSize == IX_NPEDL_REG_SIZE_WORD) {
|
|
/*
|
|
* NPE register addressing is left-to-right: e.g. |d0|d1|d2|d3|
|
|
* Write upper half-word (short) to |d0|d1|
|
|
*/
|
|
error = npe_logical_reg_write(sc, regAddr,
|
|
regVal >> IX_NPEDL_REG_SIZE_SHORT,
|
|
IX_NPEDL_REG_SIZE_SHORT, ctxtNum, verify);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
/* Write lower half-word (short) to |d2|d3| */
|
|
error = npe_logical_reg_write(sc,
|
|
regAddr + sizeof(uint16_t),
|
|
regVal & 0xffff,
|
|
IX_NPEDL_REG_SIZE_SHORT, ctxtNum, verify);
|
|
} else {
|
|
uint32_t npeInstruction;
|
|
|
|
switch (regSize) {
|
|
case IX_NPEDL_REG_SIZE_BYTE:
|
|
npeInstruction = IX_NPEDL_INSTR_WR_REG_BYTE;
|
|
regVal &= 0xff;
|
|
break;
|
|
case IX_NPEDL_REG_SIZE_SHORT:
|
|
npeInstruction = IX_NPEDL_INSTR_WR_REG_SHORT;
|
|
regVal &= 0xffff;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
/* fill dest operand field of inst with dest reg addr */
|
|
npeInstruction |= (regAddr << IX_NPEDL_OFFSET_INSTR_DEST);
|
|
|
|
/* fill src operand field of inst with least-sig 5 bits of val*/
|
|
npeInstruction |=
|
|
((regVal & IX_NPEDL_MASK_IMMED_INSTR_SRC_DATA) <<
|
|
IX_NPEDL_OFFSET_INSTR_SRC);
|
|
|
|
/* fill coprocessor field of inst with most-sig 11 bits of val*/
|
|
npeInstruction |=
|
|
((regVal & IX_NPEDL_MASK_IMMED_INSTR_COPROC_DATA) <<
|
|
IX_NPEDL_DISPLACE_IMMED_INSTR_COPROC_DATA);
|
|
|
|
/* step execution of NPE instruction using Debug ECS */
|
|
error = npe_cpu_step(sc, npeInstruction,
|
|
ctxtNum, IX_NPEDL_WR_INSTR_LDUR);
|
|
}
|
|
if (error != 0) {
|
|
DPRINTF(sc->sc_dev, "%s(0x%x, 0x%x, %u, %u), error %u "
|
|
"writing reg\n", __func__, regAddr, regVal, regSize,
|
|
ctxtNum, error);
|
|
return error;
|
|
}
|
|
if (verify) {
|
|
uint32_t retRegVal;
|
|
|
|
error = npe_logical_reg_read(sc, regAddr, regSize, ctxtNum,
|
|
&retRegVal);
|
|
if (error == 0 && regVal != retRegVal)
|
|
error = EIO; /* XXX ambiguous */
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* There are 32 physical registers used in an NPE. These are
|
|
* treated as 16 pairs of 32-bit registers. To write one of the pair,
|
|
* write the pair number (0-16) to the REGMAP for Context 0. Then write
|
|
* the value to register 0 or 4 in the regfile, depending on which
|
|
* register of the pair is to be written
|
|
*/
|
|
static int
|
|
npe_physical_reg_write(struct ixpnpe_softc *sc,
|
|
uint32_t regAddr, uint32_t regValue, int verify)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Set REGMAP for context 0 to (regAddr >> 1) to choose which pair
|
|
* (0-16) of physical registers to write .
|
|
*/
|
|
error = npe_logical_reg_write(sc, IX_NPEDL_CTXT_REG_ADDR_REGMAP,
|
|
(regAddr >> IX_NPEDL_OFFSET_PHYS_REG_ADDR_REGMAP),
|
|
IX_NPEDL_REG_SIZE_SHORT, 0, verify);
|
|
if (error == 0) {
|
|
/* regAddr = 0 or 4 */
|
|
regAddr = (regAddr & IX_NPEDL_MASK_PHYS_REG_ADDR_LOGICAL_ADDR) *
|
|
sizeof(uint32_t);
|
|
error = npe_logical_reg_write(sc, regAddr, regValue,
|
|
IX_NPEDL_REG_SIZE_WORD, 0, verify);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
npe_ctx_reg_write(struct ixpnpe_softc *sc, uint32_t ctxtNum,
|
|
uint32_t ctxtReg, uint32_t ctxtRegVal, int verify)
|
|
{
|
|
DPRINTFn(4, sc->sc_dev, "%s(%u, %u, %u)\n",
|
|
__func__, ctxtNum, ctxtReg, ctxtRegVal);
|
|
/*
|
|
* Context 0 has no STARTPC. Instead, this value is used to set
|
|
* NextPC for Background ECS, to set where NPE starts executing code
|
|
*/
|
|
if (ctxtNum == 0 && ctxtReg == IX_NPEDL_CTXT_REG_STARTPC) {
|
|
/* read BG_CTXT_REG_0, update NEXTPC bits, & write back to reg*/
|
|
uint32_t v = npe_ecs_reg_read(sc, IX_NPEDL_ECS_BG_CTXT_REG_0);
|
|
v &= ~IX_NPEDL_MASK_ECS_REG_0_NEXTPC;
|
|
v |= (ctxtRegVal << IX_NPEDL_OFFSET_ECS_REG_0_NEXTPC) &
|
|
IX_NPEDL_MASK_ECS_REG_0_NEXTPC;
|
|
|
|
npe_ecs_reg_write(sc, IX_NPEDL_ECS_BG_CTXT_REG_0, v);
|
|
return 0;
|
|
} else {
|
|
static const struct {
|
|
uint32_t regAddress;
|
|
uint32_t regSize;
|
|
} regAccInfo[IX_NPEDL_CTXT_REG_MAX] = {
|
|
{ IX_NPEDL_CTXT_REG_ADDR_STEVT,
|
|
IX_NPEDL_REG_SIZE_BYTE },
|
|
{ IX_NPEDL_CTXT_REG_ADDR_STARTPC,
|
|
IX_NPEDL_REG_SIZE_SHORT },
|
|
{ IX_NPEDL_CTXT_REG_ADDR_REGMAP,
|
|
IX_NPEDL_REG_SIZE_SHORT },
|
|
{ IX_NPEDL_CTXT_REG_ADDR_CINDEX,
|
|
IX_NPEDL_REG_SIZE_BYTE }
|
|
};
|
|
return npe_logical_reg_write(sc, regAccInfo[ctxtReg].regAddress,
|
|
ctxtRegVal, regAccInfo[ctxtReg].regSize, ctxtNum, verify);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* NPE Mailbox support.
|
|
*/
|
|
#define IX_NPEMH_MAXTRIES 100000
|
|
|
|
static int
|
|
ofifo_wait(struct ixpnpe_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < IX_NPEMH_MAXTRIES; i++) {
|
|
if (npe_reg_read(sc, IX_NPESTAT) & IX_NPESTAT_OFNE)
|
|
return 1;
|
|
DELAY(10);
|
|
}
|
|
device_printf(sc->sc_dev, "%s: timeout, last status 0x%x\n",
|
|
__func__, npe_reg_read(sc, IX_NPESTAT));
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
getmsg(struct ixpnpe_softc *sc, uint32_t msg[2])
|
|
{
|
|
mtx_assert(&sc->sc_mtx, MA_OWNED);
|
|
|
|
if (!ofifo_wait(sc))
|
|
return EAGAIN;
|
|
msg[0] = npe_reg_read(sc, IX_NPEFIFO);
|
|
DPRINTF(sc->sc_dev, "%s: msg0 0x%x\n", __func__, msg[0]);
|
|
if (!ofifo_wait(sc))
|
|
return EAGAIN;
|
|
msg[1] = npe_reg_read(sc, IX_NPEFIFO);
|
|
DPRINTF(sc->sc_dev, "%s: msg1 0x%x\n", __func__, msg[1]);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ixpnpe_intr(void *arg)
|
|
{
|
|
struct ixpnpe_softc *sc = arg;
|
|
uint32_t status;
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
status = npe_reg_read(sc, IX_NPESTAT);
|
|
DPRINTF(sc->sc_dev, "%s: status 0x%x\n", __func__, status);
|
|
if ((status & IX_NPESTAT_OFINT) == 0) {
|
|
/* NB: should not happen */
|
|
device_printf(sc->sc_dev, "%s: status 0x%x\n",
|
|
__func__, status);
|
|
/* XXX must silence interrupt? */
|
|
mtx_unlock(&sc->sc_mtx);
|
|
return;
|
|
}
|
|
/*
|
|
* A message is waiting in the output FIFO, copy it so
|
|
* the interrupt will be silenced.
|
|
*/
|
|
if (getmsg(sc, sc->sc_msg) == 0)
|
|
sc->sc_msgwaiting = 1;
|
|
mtx_unlock(&sc->sc_mtx);
|
|
}
|
|
|
|
static int
|
|
ififo_wait(struct ixpnpe_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < IX_NPEMH_MAXTRIES; i++) {
|
|
if (npe_reg_read(sc, IX_NPESTAT) & IX_NPESTAT_IFNF)
|
|
return 1;
|
|
DELAY(10);
|
|
}
|
|
device_printf(sc->sc_dev, "%s: timeout, last status 0x%x\n",
|
|
__func__, npe_reg_read(sc, IX_NPESTAT));
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
putmsg(struct ixpnpe_softc *sc, const uint32_t msg[2])
|
|
{
|
|
mtx_assert(&sc->sc_mtx, MA_OWNED);
|
|
|
|
DPRINTF(sc->sc_dev, "%s: msg 0x%x:0x%x\n", __func__, msg[0], msg[1]);
|
|
if (!ififo_wait(sc))
|
|
return EIO;
|
|
npe_reg_write(sc, IX_NPEFIFO, msg[0]);
|
|
if (!ififo_wait(sc))
|
|
return EIO;
|
|
npe_reg_write(sc, IX_NPEFIFO, msg[1]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Send a msg to the NPE and wait for a reply. We spin as
|
|
* we may be called early with interrupts not properly setup.
|
|
*/
|
|
int
|
|
ixpnpe_sendandrecvmsg_sync(struct ixpnpe_softc *sc,
|
|
const uint32_t send[2], uint32_t recv[2])
|
|
{
|
|
int error;
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
error = putmsg(sc, send);
|
|
if (error == 0)
|
|
error = getmsg(sc, recv);
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Send a msg to the NPE w/o waiting for a reply.
|
|
*/
|
|
int
|
|
ixpnpe_sendmsg_async(struct ixpnpe_softc *sc, const uint32_t msg[2])
|
|
{
|
|
int error;
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
error = putmsg(sc, msg);
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
recvmsg_locked(struct ixpnpe_softc *sc, uint32_t msg[2])
|
|
{
|
|
mtx_assert(&sc->sc_mtx, MA_OWNED);
|
|
|
|
DPRINTF(sc->sc_dev, "%s: msgwaiting %d\n", __func__, sc->sc_msgwaiting);
|
|
if (sc->sc_msgwaiting) {
|
|
msg[0] = sc->sc_msg[0];
|
|
msg[1] = sc->sc_msg[1];
|
|
sc->sc_msgwaiting = 0;
|
|
return 0;
|
|
}
|
|
return EAGAIN;
|
|
}
|
|
|
|
/*
|
|
* Receive any msg previously received from the NPE. If nothing
|
|
* is available we return EAGAIN and the caller is required to
|
|
* do a synchronous receive or try again later.
|
|
*/
|
|
int
|
|
ixpnpe_recvmsg_async(struct ixpnpe_softc *sc, uint32_t msg[2])
|
|
{
|
|
int error;
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
error = recvmsg_locked(sc, msg);
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Receive a msg from the NPE. If one was received asynchronously
|
|
* then it's returned; otherwise we poll synchronously.
|
|
*/
|
|
int
|
|
ixpnpe_recvmsg_sync(struct ixpnpe_softc *sc, uint32_t msg[2])
|
|
{
|
|
int error;
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
error = recvmsg_locked(sc, msg);
|
|
if (error == EAGAIN)
|
|
error = getmsg(sc, msg);
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return error;
|
|
}
|