mpc85xx.c revision 267654
1238106Sdes/*- 2238106Sdes * Copyright (C) 2008 Semihalf, Rafal Jaworowski 3238106Sdes * All rights reserved. 4238106Sdes * 5238106Sdes * Redistribution and use in source and binary forms, with or without 6238106Sdes * modification, are permitted provided that the following conditions 7238106Sdes * are met: 8238106Sdes * 1. Redistributions of source code must retain the above copyright 9238106Sdes * notice, this list of conditions and the following disclaimer. 10238106Sdes * 2. Redistributions in binary form must reproduce the above copyright 11238106Sdes * notice, this list of conditions and the following disclaimer in the 12238106Sdes * documentation and/or other materials provided with the distribution. 13238106Sdes * 14238106Sdes * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15238106Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16238106Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17238106Sdes * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 18238106Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19238106Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20238106Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21238106Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22238106Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23238106Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24269257Sdes * SUCH DAMAGE. 25269257Sdes */ 26269257Sdes 27269257Sdes#include <sys/cdefs.h> 28269257Sdes__FBSDID("$FreeBSD: releng/9.3/sys/powerpc/mpc85xx/mpc85xx.c 222428 2011-05-28 19:14:16Z marcel $"); 29269257Sdes 30269257Sdes#include <sys/param.h> 31269257Sdes#include <sys/systm.h> 32269257Sdes#include <sys/lock.h> 33269257Sdes#include <sys/mutex.h> 34238106Sdes#include <sys/rman.h> 35238106Sdes 36238106Sdes#include <vm/vm.h> 37238106Sdes#include <vm/vm_param.h> 38238106Sdes 39238106Sdes#include <machine/cpu.h> 40238106Sdes#include <machine/cpufunc.h> 41238106Sdes#include <machine/spr.h> 42238106Sdes 43238106Sdes#include <powerpc/mpc85xx/mpc85xx.h> 44238106Sdes 45238106Sdes/* 46269257Sdes * MPC85xx system specific routines 47238106Sdes */ 48238106Sdes 49238106Sdesuint32_t 50238106Sdesccsr_read4(uintptr_t addr) 51238106Sdes{ 52238106Sdes volatile uint32_t *ptr = (void *)addr; 53238106Sdes 54238106Sdes return (*ptr); 55238106Sdes} 56238106Sdes 57238106Sdesvoid 58238106Sdesccsr_write4(uintptr_t addr, uint32_t val) 59238106Sdes{ 60238106Sdes volatile uint32_t *ptr = (void *)addr; 61238106Sdes 62238106Sdes *ptr = val; 63238106Sdes __asm __volatile("eieio; sync"); 64269257Sdes} 65269257Sdes 66269257Sdesint 67269257Sdeslaw_getmax(void) 68238106Sdes{ 69238106Sdes uint32_t ver; 70238106Sdes 71238106Sdes ver = SVR_VER(mfspr(SPR_SVR)); 72238106Sdes if (ver == SVR_MPC8555E || ver == SVR_MPC8555) 73238106Sdes return (8); 74269257Sdes if (ver == SVR_MPC8548E || ver == SVR_MPC8548 || 75269257Sdes ver == SVR_MPC8533E || ver == SVR_MPC8533) 76238106Sdes return (10); 77238106Sdes 78238106Sdes return (12); 79238106Sdes} 80238106Sdes 81238106Sdes#define _LAW_SR(trgt,size) (0x80000000 | (trgt << 20) | (ffsl(size) - 2)) 82238106Sdes#define _LAW_BAR(addr) (addr >> 12) 83238106Sdes 84238106Sdesint 85238106Sdeslaw_enable(int trgt, u_long addr, u_long size) 86238106Sdes{ 87238106Sdes uint32_t bar, sr; 88238106Sdes int i, law_max; 89238106Sdes 90238106Sdes law_max = law_getmax(); 91238106Sdes bar = _LAW_BAR(addr); 92238106Sdes sr = _LAW_SR(trgt, size); 93238106Sdes 94238106Sdes /* Bail if already programmed. */ 95238106Sdes for (i = 0; i < law_max; i++) 96238106Sdes if (sr == ccsr_read4(OCP85XX_LAWSR(i)) && 97238106Sdes bar == ccsr_read4(OCP85XX_LAWBAR(i))) 98238106Sdes return (0); 99238106Sdes 100238106Sdes /* Find an unused access window. */ 101238106Sdes for (i = 0; i < law_max; i++) 102238106Sdes if ((ccsr_read4(OCP85XX_LAWSR(i)) & 0x80000000) == 0) 103238106Sdes break; 104238106Sdes 105238106Sdes if (i == law_max) 106238106Sdes return (ENOSPC); 107238106Sdes 108238106Sdes ccsr_write4(OCP85XX_LAWBAR(i), bar); 109238106Sdes ccsr_write4(OCP85XX_LAWSR(i), sr); 110238106Sdes return (0); 111238106Sdes} 112238106Sdes 113238106Sdesint 114238106Sdeslaw_disable(int trgt, u_long addr, u_long size) 115238106Sdes{ 116238106Sdes uint32_t bar, sr; 117238106Sdes int i, law_max; 118238106Sdes 119238106Sdes law_max = law_getmax(); 120238106Sdes bar = _LAW_BAR(addr); 121238106Sdes sr = _LAW_SR(trgt, size); 122238106Sdes 123238106Sdes /* Find and disable requested LAW. */ 124238106Sdes for (i = 0; i < law_max; i++) 125238106Sdes if (sr == ccsr_read4(OCP85XX_LAWSR(i)) && 126238106Sdes bar == ccsr_read4(OCP85XX_LAWBAR(i))) { 127238106Sdes ccsr_write4(OCP85XX_LAWBAR(i), 0); 128238106Sdes ccsr_write4(OCP85XX_LAWSR(i), 0); 129238106Sdes return (0); 130238106Sdes } 131238106Sdes 132238106Sdes return (ENOENT); 133238106Sdes} 134238106Sdes 135238106Sdesint 136269257Sdeslaw_pci_target(struct resource *res, int *trgt_mem, int *trgt_io) 137269257Sdes{ 138269257Sdes u_long start; 139269257Sdes uint32_t ver; 140269257Sdes int trgt, rv; 141269257Sdes 142269257Sdes ver = SVR_VER(mfspr(SPR_SVR)); 143269257Sdes 144269257Sdes start = rman_get_start(res) & 0xf000; 145269257Sdes 146269257Sdes rv = 0; 147269257Sdes trgt = -1; 148269257Sdes switch (start) { 149269257Sdes case 0x8000: 150269257Sdes trgt = 0; 151269257Sdes break; 152269257Sdes case 0x9000: 153269257Sdes trgt = 1; 154269257Sdes break; 155269257Sdes case 0xa000: 156269257Sdes if (ver == SVR_MPC8548E || ver == SVR_MPC8548) 157269257Sdes trgt = 3; 158269257Sdes else 159269257Sdes trgt = 2; 160269257Sdes break; 161269257Sdes case 0xb000: 162269257Sdes if (ver == SVR_MPC8548E || ver == SVR_MPC8548) 163269257Sdes rv = EINVAL; 164269257Sdes else 165269257Sdes trgt = 3; 166269257Sdes break; 167269257Sdes default: 168269257Sdes rv = ENXIO; 169269257Sdes } 170269257Sdes *trgt_mem = *trgt_io = trgt; 171269257Sdes return (rv); 172269257Sdes} 173269257Sdes 174269257Sdes