674 lines
16 KiB
C
674 lines
16 KiB
C
/*-
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* Copyright (c) 2009 Rui Paulo <rpaulo@FreeBSD.org>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/pmc.h>
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#include <sys/pmckern.h>
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#include <machine/pmc_mdep.h>
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/*
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* Support for the Intel XScale network processors
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*
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* XScale processors have up to now three generations.
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*
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* The first generation has two PMC; the event selection, interrupt config
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* and overflow flag setup are done by writing to the PMNC register.
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* It also has less monitoring events than the latter generations.
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*
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* The second and third generatiosn have four PMCs, one register for the event
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* selection, one register for the interrupt config and one register for
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* the overflow flags.
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*/
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static int xscale_npmcs;
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static int xscale_gen; /* XScale Core generation */
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struct xscale_event_code_map {
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enum pmc_event pe_ev;
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uint8_t pe_code;
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};
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const struct xscale_event_code_map xscale_event_codes[] = {
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/* 1st and 2nd Generation XScale cores */
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{ PMC_EV_XSCALE_IC_FETCH, 0x00 },
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{ PMC_EV_XSCALE_IC_MISS, 0x01 },
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{ PMC_EV_XSCALE_DATA_DEPENDENCY_STALLED,0x02 },
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{ PMC_EV_XSCALE_ITLB_MISS, 0x03 },
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{ PMC_EV_XSCALE_DTLB_MISS, 0x04 },
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{ PMC_EV_XSCALE_BRANCH_RETIRED, 0x05 },
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{ PMC_EV_XSCALE_BRANCH_MISPRED, 0x06 },
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{ PMC_EV_XSCALE_INSTR_RETIRED, 0x07 },
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{ PMC_EV_XSCALE_DC_FULL_CYCLE, 0x08 },
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{ PMC_EV_XSCALE_DC_FULL_CONTIG, 0x09 },
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{ PMC_EV_XSCALE_DC_ACCESS, 0x0a },
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{ PMC_EV_XSCALE_DC_MISS, 0x0b },
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{ PMC_EV_XSCALE_DC_WRITEBACK, 0x0c },
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{ PMC_EV_XSCALE_PC_CHANGE, 0x0d },
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/* 3rd Generation XScale cores */
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{ PMC_EV_XSCALE_BRANCH_RETIRED_ALL, 0x0e },
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{ PMC_EV_XSCALE_INSTR_CYCLE, 0x0f },
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{ PMC_EV_XSCALE_CP_STALL, 0x17 },
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{ PMC_EV_XSCALE_PC_CHANGE_ALL, 0x18 },
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{ PMC_EV_XSCALE_PIPELINE_FLUSH, 0x19 },
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{ PMC_EV_XSCALE_BACKEND_STALL, 0x1a },
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{ PMC_EV_XSCALE_MULTIPLIER_USE, 0x1b },
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{ PMC_EV_XSCALE_MULTIPLIER_STALLED, 0x1c },
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{ PMC_EV_XSCALE_DATA_CACHE_STALLED, 0x1e },
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{ PMC_EV_XSCALE_L2_CACHE_REQ, 0x20 },
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{ PMC_EV_XSCALE_L2_CACHE_MISS, 0x23 },
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{ PMC_EV_XSCALE_ADDRESS_BUS_TRANS, 0x40 },
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{ PMC_EV_XSCALE_SELF_ADDRESS_BUS_TRANS, 0x41 },
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{ PMC_EV_XSCALE_DATA_BUS_TRANS, 0x48 },
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};
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/*
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* Per-processor information.
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*/
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struct xscale_cpu {
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struct pmc_hw *pc_xscalepmcs;
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};
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static struct xscale_cpu **xscale_pcpu;
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/*
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* Performance Monitor Control Register
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*/
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static __inline uint32_t
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xscale_pmnc_read(void)
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{
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uint32_t reg;
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__asm __volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (reg));
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return (reg);
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}
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static __inline void
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xscale_pmnc_write(uint32_t reg)
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{
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__asm __volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (reg));
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}
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/*
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* Clock Counter Register
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*/
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static __inline uint32_t
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xscale_ccnt_read(void)
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{
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uint32_t reg;
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__asm __volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (reg));
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return (reg);
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}
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static __inline void
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xscale_ccnt_write(uint32_t reg)
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{
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__asm __volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (reg));
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}
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/*
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* Interrupt Enable Register
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*/
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static __inline uint32_t
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xscale_inten_read(void)
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{
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uint32_t reg;
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__asm __volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (reg));
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return (reg);
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}
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static __inline void
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xscale_inten_write(uint32_t reg)
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{
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__asm __volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (reg));
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}
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/*
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* Overflow Flag Register
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*/
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static __inline uint32_t
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xscale_flag_read(void)
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{
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uint32_t reg;
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__asm __volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (reg));
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return (reg);
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}
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static __inline void
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xscale_flag_write(uint32_t reg)
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{
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__asm __volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (reg));
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}
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/*
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* Event Selection Register
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*/
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static __inline uint32_t
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xscale_evtsel_read(void)
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{
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uint32_t reg;
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__asm __volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (reg));
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return (reg);
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}
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static __inline void
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xscale_evtsel_write(uint32_t reg)
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{
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__asm __volatile("mcr p14, 0, %0, c8, c1, 0" : : "r" (reg));
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}
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/*
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* Performance Count Register N
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*/
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static uint32_t
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xscale_pmcn_read(unsigned int pmc)
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{
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uint32_t reg = 0;
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KASSERT(pmc < 4, ("[xscale,%d] illegal PMC number %d", __LINE__, pmc));
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switch (pmc) {
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case 0:
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__asm __volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (reg));
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break;
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case 1:
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__asm __volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (reg));
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break;
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case 2:
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__asm __volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (reg));
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break;
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case 3:
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__asm __volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (reg));
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break;
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}
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return (reg);
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}
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static uint32_t
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xscale_pmcn_write(unsigned int pmc, uint32_t reg)
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{
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KASSERT(pmc < 4, ("[xscale,%d] illegal PMC number %d", __LINE__, pmc));
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switch (pmc) {
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case 0:
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__asm __volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (reg));
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break;
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case 1:
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__asm __volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (reg));
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break;
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case 2:
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__asm __volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (reg));
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break;
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case 3:
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__asm __volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (reg));
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break;
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}
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return (reg);
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}
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static int
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xscale_allocate_pmc(int cpu, int ri, struct pmc *pm,
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const struct pmc_op_pmcallocate *a)
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{
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enum pmc_event pe;
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uint32_t caps, config;
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int i;
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KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
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("[xscale,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < xscale_npmcs,
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("[xscale,%d] illegal row index %d", __LINE__, ri));
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caps = a->pm_caps;
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if (a->pm_class != PMC_CLASS_XSCALE)
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return (EINVAL);
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pe = a->pm_ev;
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for (i = 0; i < nitems(xscale_event_codes); i++) {
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if (xscale_event_codes[i].pe_ev == pe) {
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config = xscale_event_codes[i].pe_code;
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break;
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}
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}
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if (i == nitems(xscale_event_codes))
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return EINVAL;
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/* Generation 1 has fewer events */
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if (xscale_gen == 1 && i > PMC_EV_XSCALE_PC_CHANGE)
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return EINVAL;
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pm->pm_md.pm_xscale.pm_xscale_evsel = config;
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PMCDBG2(MDP,ALL,2,"xscale-allocate ri=%d -> config=0x%x", ri, config);
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return 0;
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}
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static int
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xscale_read_pmc(int cpu, int ri, pmc_value_t *v)
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{
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struct pmc *pm;
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pmc_value_t tmp;
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KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
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("[xscale,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < xscale_npmcs,
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("[xscale,%d] illegal row index %d", __LINE__, ri));
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pm = xscale_pcpu[cpu]->pc_xscalepmcs[ri].phw_pmc;
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tmp = xscale_pmcn_read(ri);
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PMCDBG2(MDP,REA,2,"xscale-read id=%d -> %jd", ri, tmp);
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if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
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*v = XSCALE_PERFCTR_VALUE_TO_RELOAD_COUNT(tmp);
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else
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*v = tmp;
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return 0;
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}
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static int
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xscale_write_pmc(int cpu, int ri, pmc_value_t v)
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{
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struct pmc *pm;
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KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
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("[xscale,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < xscale_npmcs,
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("[xscale,%d] illegal row-index %d", __LINE__, ri));
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pm = xscale_pcpu[cpu]->pc_xscalepmcs[ri].phw_pmc;
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if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
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v = XSCALE_RELOAD_COUNT_TO_PERFCTR_VALUE(v);
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PMCDBG3(MDP,WRI,1,"xscale-write cpu=%d ri=%d v=%jx", cpu, ri, v);
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xscale_pmcn_write(ri, v);
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return 0;
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}
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static int
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xscale_config_pmc(int cpu, int ri, struct pmc *pm)
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{
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struct pmc_hw *phw;
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PMCDBG3(MDP,CFG,1, "cpu=%d ri=%d pm=%p", cpu, ri, pm);
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KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
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("[xscale,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < xscale_npmcs,
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("[xscale,%d] illegal row-index %d", __LINE__, ri));
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phw = &xscale_pcpu[cpu]->pc_xscalepmcs[ri];
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KASSERT(pm == NULL || phw->phw_pmc == NULL,
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("[xscale,%d] pm=%p phw->pm=%p hwpmc not unconfigured",
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__LINE__, pm, phw->phw_pmc));
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phw->phw_pmc = pm;
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return 0;
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}
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static int
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xscale_start_pmc(int cpu, int ri)
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{
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uint32_t pmnc, config, evtsel;
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struct pmc *pm;
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struct pmc_hw *phw;
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phw = &xscale_pcpu[cpu]->pc_xscalepmcs[ri];
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pm = phw->phw_pmc;
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config = pm->pm_md.pm_xscale.pm_xscale_evsel;
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/*
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* Configure the event selection.
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*
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* On the XScale 2nd Generation there's no EVTSEL register.
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*/
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if (xscale_npmcs == 2) {
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pmnc = xscale_pmnc_read();
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switch (ri) {
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case 0:
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pmnc &= ~XSCALE_PMNC_EVT0_MASK;
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pmnc |= (config << 12) & XSCALE_PMNC_EVT0_MASK;
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break;
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case 1:
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pmnc &= ~XSCALE_PMNC_EVT1_MASK;
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pmnc |= (config << 20) & XSCALE_PMNC_EVT1_MASK;
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break;
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default:
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/* XXX */
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break;
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}
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xscale_pmnc_write(pmnc);
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} else {
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evtsel = xscale_evtsel_read();
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switch (ri) {
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case 0:
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evtsel &= ~XSCALE_EVTSEL_EVT0_MASK;
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evtsel |= config & XSCALE_EVTSEL_EVT0_MASK;
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break;
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case 1:
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evtsel &= ~XSCALE_EVTSEL_EVT1_MASK;
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evtsel |= (config << 8) & XSCALE_EVTSEL_EVT1_MASK;
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break;
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case 2:
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evtsel &= ~XSCALE_EVTSEL_EVT2_MASK;
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evtsel |= (config << 16) & XSCALE_EVTSEL_EVT2_MASK;
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break;
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case 3:
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evtsel &= ~XSCALE_EVTSEL_EVT3_MASK;
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evtsel |= (config << 24) & XSCALE_EVTSEL_EVT3_MASK;
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break;
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default:
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/* XXX */
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break;
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}
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xscale_evtsel_write(evtsel);
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}
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/*
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* Enable the PMC.
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*
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* Note that XScale provides only one bit to enable/disable _all_
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* performance monitoring units.
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*/
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pmnc = xscale_pmnc_read();
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pmnc |= XSCALE_PMNC_ENABLE;
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xscale_pmnc_write(pmnc);
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return 0;
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}
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static int
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xscale_stop_pmc(int cpu, int ri)
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{
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uint32_t pmnc, evtsel;
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struct pmc *pm;
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struct pmc_hw *phw;
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phw = &xscale_pcpu[cpu]->pc_xscalepmcs[ri];
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pm = phw->phw_pmc;
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/*
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* Disable the PMCs.
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*
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* Note that XScale provides only one bit to enable/disable _all_
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* performance monitoring units.
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*/
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pmnc = xscale_pmnc_read();
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pmnc &= ~XSCALE_PMNC_ENABLE;
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xscale_pmnc_write(pmnc);
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/*
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* A value of 0xff makes the corresponding PMU go into
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* power saving mode.
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*/
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if (xscale_npmcs == 2) {
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pmnc = xscale_pmnc_read();
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switch (ri) {
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case 0:
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pmnc |= XSCALE_PMNC_EVT0_MASK;
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break;
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case 1:
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pmnc |= XSCALE_PMNC_EVT1_MASK;
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break;
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default:
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/* XXX */
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break;
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}
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xscale_pmnc_write(pmnc);
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} else {
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evtsel = xscale_evtsel_read();
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switch (ri) {
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case 0:
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evtsel |= XSCALE_EVTSEL_EVT0_MASK;
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break;
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case 1:
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evtsel |= XSCALE_EVTSEL_EVT1_MASK;
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break;
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case 2:
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evtsel |= XSCALE_EVTSEL_EVT2_MASK;
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break;
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case 3:
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evtsel |= XSCALE_EVTSEL_EVT3_MASK;
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break;
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default:
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/* XXX */
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break;
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}
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xscale_evtsel_write(evtsel);
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}
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return 0;
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}
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static int
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xscale_release_pmc(int cpu, int ri, struct pmc *pmc)
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{
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struct pmc_hw *phw;
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KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
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("[xscale,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < xscale_npmcs,
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("[xscale,%d] illegal row-index %d", __LINE__, ri));
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phw = &xscale_pcpu[cpu]->pc_xscalepmcs[ri];
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KASSERT(phw->phw_pmc == NULL,
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("[xscale,%d] PHW pmc %p non-NULL", __LINE__, phw->phw_pmc));
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return 0;
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}
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static int
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xscale_intr(int cpu, struct trapframe *tf)
|
|
{
|
|
printf("intr\n");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xscale_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc)
|
|
{
|
|
int error;
|
|
struct pmc_hw *phw;
|
|
char xscale_name[PMC_NAME_MAX];
|
|
|
|
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
|
|
("[xscale,%d], illegal CPU %d", __LINE__, cpu));
|
|
KASSERT(ri >= 0 && ri < xscale_npmcs,
|
|
("[xscale,%d] row-index %d out of range", __LINE__, ri));
|
|
|
|
phw = &xscale_pcpu[cpu]->pc_xscalepmcs[ri];
|
|
snprintf(xscale_name, sizeof(xscale_name), "XSCALE-%d", ri);
|
|
if ((error = copystr(xscale_name, pi->pm_name, PMC_NAME_MAX,
|
|
NULL)) != 0)
|
|
return error;
|
|
pi->pm_class = PMC_CLASS_XSCALE;
|
|
if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) {
|
|
pi->pm_enabled = TRUE;
|
|
*ppmc = phw->phw_pmc;
|
|
} else {
|
|
pi->pm_enabled = FALSE;
|
|
*ppmc = NULL;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
xscale_get_config(int cpu, int ri, struct pmc **ppm)
|
|
{
|
|
*ppm = xscale_pcpu[cpu]->pc_xscalepmcs[ri].phw_pmc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* XXX don't know what we should do here.
|
|
*/
|
|
static int
|
|
xscale_switch_in(struct pmc_cpu *pc, struct pmc_process *pp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xscale_switch_out(struct pmc_cpu *pc, struct pmc_process *pp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xscale_pcpu_init(struct pmc_mdep *md, int cpu)
|
|
{
|
|
int first_ri, i;
|
|
struct pmc_cpu *pc;
|
|
struct xscale_cpu *pac;
|
|
struct pmc_hw *phw;
|
|
|
|
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
|
|
("[xscale,%d] wrong cpu number %d", __LINE__, cpu));
|
|
PMCDBG1(MDP,INI,1,"xscale-init cpu=%d", cpu);
|
|
|
|
xscale_pcpu[cpu] = pac = malloc(sizeof(struct xscale_cpu), M_PMC,
|
|
M_WAITOK|M_ZERO);
|
|
pac->pc_xscalepmcs = malloc(sizeof(struct pmc_hw) * xscale_npmcs,
|
|
M_PMC, M_WAITOK|M_ZERO);
|
|
pc = pmc_pcpu[cpu];
|
|
first_ri = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_XSCALE].pcd_ri;
|
|
KASSERT(pc != NULL, ("[xscale,%d] NULL per-cpu pointer", __LINE__));
|
|
|
|
for (i = 0, phw = pac->pc_xscalepmcs; i < xscale_npmcs; i++, phw++) {
|
|
phw->phw_state = PMC_PHW_FLAG_IS_ENABLED |
|
|
PMC_PHW_CPU_TO_STATE(cpu) | PMC_PHW_INDEX_TO_STATE(i);
|
|
phw->phw_pmc = NULL;
|
|
pc->pc_hwpmcs[i + first_ri] = phw;
|
|
}
|
|
|
|
/*
|
|
* Disable and put the PMUs into power save mode.
|
|
*/
|
|
if (xscale_npmcs == 2) {
|
|
xscale_pmnc_write(XSCALE_PMNC_EVT1_MASK |
|
|
XSCALE_PMNC_EVT0_MASK);
|
|
} else {
|
|
xscale_evtsel_write(XSCALE_EVTSEL_EVT3_MASK |
|
|
XSCALE_EVTSEL_EVT2_MASK | XSCALE_EVTSEL_EVT1_MASK |
|
|
XSCALE_EVTSEL_EVT0_MASK);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xscale_pcpu_fini(struct pmc_mdep *md, int cpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct pmc_mdep *
|
|
pmc_xscale_initialize()
|
|
{
|
|
struct pmc_mdep *pmc_mdep;
|
|
struct pmc_classdep *pcd;
|
|
uint32_t idreg;
|
|
|
|
/* Get the Core Generation from CP15 */
|
|
__asm __volatile("mrc p15, 0, %0, c0, c0, 0" : "=r" (idreg));
|
|
xscale_gen = (idreg >> 13) & 0x3;
|
|
switch (xscale_gen) {
|
|
case 1:
|
|
xscale_npmcs = 2;
|
|
break;
|
|
case 2:
|
|
case 3:
|
|
xscale_npmcs = 4;
|
|
break;
|
|
default:
|
|
printf("%s: unknown XScale core generation\n", __func__);
|
|
return (NULL);
|
|
}
|
|
PMCDBG1(MDP,INI,1,"xscale-init npmcs=%d", xscale_npmcs);
|
|
|
|
/*
|
|
* Allocate space for pointers to PMC HW descriptors and for
|
|
* the MDEP structure used by MI code.
|
|
*/
|
|
xscale_pcpu = malloc(sizeof(struct xscale_cpu *) * pmc_cpu_max(), M_PMC,
|
|
M_WAITOK|M_ZERO);
|
|
|
|
/* Just one class */
|
|
pmc_mdep = pmc_mdep_alloc(1);
|
|
|
|
pmc_mdep->pmd_cputype = PMC_CPU_INTEL_XSCALE;
|
|
|
|
pcd = &pmc_mdep->pmd_classdep[PMC_MDEP_CLASS_INDEX_XSCALE];
|
|
pcd->pcd_caps = XSCALE_PMC_CAPS;
|
|
pcd->pcd_class = PMC_CLASS_XSCALE;
|
|
pcd->pcd_num = xscale_npmcs;
|
|
pcd->pcd_ri = pmc_mdep->pmd_npmc;
|
|
pcd->pcd_width = 32;
|
|
|
|
pcd->pcd_allocate_pmc = xscale_allocate_pmc;
|
|
pcd->pcd_config_pmc = xscale_config_pmc;
|
|
pcd->pcd_pcpu_fini = xscale_pcpu_fini;
|
|
pcd->pcd_pcpu_init = xscale_pcpu_init;
|
|
pcd->pcd_describe = xscale_describe;
|
|
pcd->pcd_get_config = xscale_get_config;
|
|
pcd->pcd_read_pmc = xscale_read_pmc;
|
|
pcd->pcd_release_pmc = xscale_release_pmc;
|
|
pcd->pcd_start_pmc = xscale_start_pmc;
|
|
pcd->pcd_stop_pmc = xscale_stop_pmc;
|
|
pcd->pcd_write_pmc = xscale_write_pmc;
|
|
|
|
pmc_mdep->pmd_intr = xscale_intr;
|
|
pmc_mdep->pmd_switch_in = xscale_switch_in;
|
|
pmc_mdep->pmd_switch_out = xscale_switch_out;
|
|
|
|
pmc_mdep->pmd_npmc += xscale_npmcs;
|
|
|
|
return (pmc_mdep);
|
|
}
|
|
|
|
void
|
|
pmc_xscale_finalize(struct pmc_mdep *md)
|
|
{
|
|
}
|