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- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (C) 2008 Semihalf, Rafal Jaworowski
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include "opt_platform.h"
- #include <sys/param.h>
- #include <sys/systm.h>
- #include <sys/lock.h>
- #include <sys/mutex.h>
- #include <sys/reboot.h>
- #include <sys/rman.h>
- #include <vm/vm.h>
- #include <vm/vm_param.h>
- #include <vm/pmap.h>
- #include <machine/cpu.h>
- #include <machine/cpufunc.h>
- #include <machine/machdep.h>
- #include <machine/pio.h>
- #include <machine/spr.h>
- #include <dev/fdt/fdt_common.h>
- #include <dev/fdt/fdt_common.h>
- #include <dev/ofw/ofw_bus.h>
- #include <dev/ofw/ofw_bus_subr.h>
- #include <dev/ofw/openfirm.h>
- #include <powerpc/mpc85xx/mpc85xx.h>
- /*
- * MPC85xx system specific routines
- */
- uint32_t
- ccsr_read4(uintptr_t addr)
- {
- volatile uint32_t *ptr = (void *)addr;
- return (*ptr);
- }
- void
- ccsr_write4(uintptr_t addr, uint32_t val)
- {
- volatile uint32_t *ptr = (void *)addr;
- *ptr = val;
- powerpc_iomb();
- }
- int
- law_getmax(void)
- {
- uint32_t ver;
- int law_max;
- ver = SVR_VER(mfspr(SPR_SVR));
- switch (ver) {
- case SVR_MPC8555:
- case SVR_MPC8555E:
- law_max = 8;
- break;
- case SVR_MPC8533:
- case SVR_MPC8533E:
- case SVR_MPC8548:
- case SVR_MPC8548E:
- law_max = 10;
- break;
- case SVR_P5020:
- case SVR_P5020E:
- case SVR_P5021:
- case SVR_P5021E:
- case SVR_P5040:
- case SVR_P5040E:
- law_max = 32;
- break;
- default:
- law_max = 8;
- }
- return (law_max);
- }
- static inline void
- law_write(uint32_t n, uint64_t bar, uint32_t sr)
- {
- if (mpc85xx_is_qoriq()) {
- ccsr_write4(OCP85XX_LAWBARH(n), bar >> 32);
- ccsr_write4(OCP85XX_LAWBARL(n), bar);
- ccsr_write4(OCP85XX_LAWSR_QORIQ(n), sr);
- ccsr_read4(OCP85XX_LAWSR_QORIQ(n));
- } else {
- ccsr_write4(OCP85XX_LAWBAR(n), bar >> 12);
- ccsr_write4(OCP85XX_LAWSR_85XX(n), sr);
- ccsr_read4(OCP85XX_LAWSR_85XX(n));
- }
- /*
- * The last write to LAWAR should be followed by a read
- * of LAWAR before any device try to use any of windows.
- * What more the read of LAWAR should be followed by isync
- * instruction.
- */
- isync();
- }
- static inline void
- law_read(uint32_t n, uint64_t *bar, uint32_t *sr)
- {
- if (mpc85xx_is_qoriq()) {
- *bar = (uint64_t)ccsr_read4(OCP85XX_LAWBARH(n)) << 32 |
- ccsr_read4(OCP85XX_LAWBARL(n));
- *sr = ccsr_read4(OCP85XX_LAWSR_QORIQ(n));
- } else {
- *bar = (uint64_t)ccsr_read4(OCP85XX_LAWBAR(n)) << 12;
- *sr = ccsr_read4(OCP85XX_LAWSR_85XX(n));
- }
- }
- static int
- law_find_free(void)
- {
- uint32_t i,sr;
- uint64_t bar;
- int law_max;
- law_max = law_getmax();
- /* Find free LAW */
- for (i = 0; i < law_max; i++) {
- law_read(i, &bar, &sr);
- if ((sr & 0x80000000) == 0)
- break;
- }
- return (i);
- }
- #define _LAW_SR(trgt,size) (0x80000000 | (trgt << 20) | \
- (flsl(size + (size - 1)) - 2))
- int
- law_enable(int trgt, uint64_t bar, uint32_t size)
- {
- uint64_t bar_tmp;
- uint32_t sr, sr_tmp;
- int i, law_max;
- if (size == 0)
- return (0);
- law_max = law_getmax();
- sr = _LAW_SR(trgt, size);
- /* Bail if already programmed. */
- for (i = 0; i < law_max; i++) {
- law_read(i, &bar_tmp, &sr_tmp);
- if (sr == sr_tmp && bar == bar_tmp)
- return (0);
- }
- /* Find an unused access window. */
- i = law_find_free();
- if (i == law_max)
- return (ENOSPC);
- law_write(i, bar, sr);
- return (0);
- }
- int
- law_disable(int trgt, uint64_t bar, uint32_t size)
- {
- uint64_t bar_tmp;
- uint32_t sr, sr_tmp;
- int i, law_max;
- law_max = law_getmax();
- sr = _LAW_SR(trgt, size);
- /* Find and disable requested LAW. */
- for (i = 0; i < law_max; i++) {
- law_read(i, &bar_tmp, &sr_tmp);
- if (sr == sr_tmp && bar == bar_tmp) {
- law_write(i, 0, 0);
- return (0);
- }
- }
- return (ENOENT);
- }
- int
- law_pci_target(struct resource *res, int *trgt_mem, int *trgt_io)
- {
- u_long start;
- uint32_t ver;
- int trgt, rv;
- ver = SVR_VER(mfspr(SPR_SVR));
- start = rman_get_start(res) & 0xf000;
- rv = 0;
- trgt = -1;
- switch (start) {
- case 0x0000:
- case 0x8000:
- trgt = 0;
- break;
- case 0x1000:
- case 0x9000:
- trgt = 1;
- break;
- case 0x2000:
- case 0xa000:
- if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
- trgt = 3;
- else
- trgt = 2;
- break;
- case 0x3000:
- case 0xb000:
- if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
- rv = EINVAL;
- else
- trgt = 3;
- break;
- default:
- rv = ENXIO;
- }
- if (rv == 0) {
- *trgt_mem = trgt;
- *trgt_io = trgt;
- }
- return (rv);
- }
- static void
- l3cache_inval(void)
- {
- /* Flash invalidate the CPC and clear all the locks */
- ccsr_write4(OCP85XX_CPC_CSR0, OCP85XX_CPC_CSR0_FI |
- OCP85XX_CPC_CSR0_LFC);
- while (ccsr_read4(OCP85XX_CPC_CSR0) & (OCP85XX_CPC_CSR0_FI |
- OCP85XX_CPC_CSR0_LFC))
- ;
- }
- static void
- l3cache_enable(void)
- {
- ccsr_write4(OCP85XX_CPC_CSR0, OCP85XX_CPC_CSR0_CE |
- OCP85XX_CPC_CSR0_PE);
- /* Read back to sync write */
- ccsr_read4(OCP85XX_CPC_CSR0);
- }
- void
- mpc85xx_enable_l3_cache(void)
- {
- uint32_t csr, size, ver;
- /* Enable L3 CoreNet Platform Cache (CPC) */
- ver = SVR_VER(mfspr(SPR_SVR));
- if (ver == SVR_P2041 || ver == SVR_P2041E || ver == SVR_P3041 ||
- ver == SVR_P3041E || ver == SVR_P5020 || ver == SVR_P5020E) {
- csr = ccsr_read4(OCP85XX_CPC_CSR0);
- if ((csr & OCP85XX_CPC_CSR0_CE) == 0) {
- l3cache_inval();
- l3cache_enable();
- }
- csr = ccsr_read4(OCP85XX_CPC_CSR0);
- if ((boothowto & RB_VERBOSE) != 0 ||
- (csr & OCP85XX_CPC_CSR0_CE) == 0) {
- size = OCP85XX_CPC_CFG0_SZ_K(ccsr_read4(OCP85XX_CPC_CFG0));
- printf("L3 Corenet Platform Cache: %d KB %sabled\n",
- size, (csr & OCP85XX_CPC_CSR0_CE) == 0 ?
- "dis" : "en");
- }
- }
- }
- int
- mpc85xx_is_qoriq(void)
- {
- uint16_t pvr = mfpvr() >> 16;
- /* QorIQ register set is only in e500mc and derivative core based SoCs. */
- if (pvr == FSL_E500mc || pvr == FSL_E5500 || pvr == FSL_E6500)
- return (1);
- return (0);
- }
- uint32_t
- mpc85xx_get_platform_clock(void)
- {
- phandle_t soc;
- static uint32_t freq;
- if (freq != 0)
- return (freq);
- soc = OF_finddevice("/soc");
- /* freq isn't modified on error. */
- OF_getencprop(soc, "bus-frequency", (void *)&freq, sizeof(freq));
- return (freq);
- }
- uint32_t
- mpc85xx_get_system_clock(void)
- {
- uint32_t freq;
- freq = mpc85xx_get_platform_clock();
- return (freq / 2);
- }
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