2 * Copyright (C) 2008 Semihalf, Rafal Jaworowski
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/mutex.h>
37 #include <vm/vm_param.h>
39 #include <machine/cpu.h>
40 #include <machine/cpufunc.h>
41 #include <machine/spr.h>
43 #include <powerpc/mpc85xx/mpc85xx.h>
46 * MPC85xx system specific routines
50 ccsr_read4(uintptr_t addr)
52 volatile uint32_t *ptr = (void *)addr;
58 ccsr_write4(uintptr_t addr, uint32_t val)
60 volatile uint32_t *ptr = (void *)addr;
63 __asm __volatile("eieio; sync");
71 ver = SVR_VER(mfspr(SPR_SVR));
72 if (ver == SVR_MPC8555E || ver == SVR_MPC8555)
74 if (ver == SVR_MPC8548E || ver == SVR_MPC8548 ||
75 ver == SVR_MPC8533E || ver == SVR_MPC8533)
81 #define _LAW_SR(trgt,size) (0x80000000 | (trgt << 20) | (ffsl(size) - 2))
82 #define _LAW_BAR(addr) (addr >> 12)
85 law_enable(int trgt, u_long addr, u_long size)
90 law_max = law_getmax();
92 sr = _LAW_SR(trgt, size);
94 /* Bail if already programmed. */
95 for (i = 0; i < law_max; i++)
96 if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
97 bar == ccsr_read4(OCP85XX_LAWBAR(i)))
100 /* Find an unused access window. */
101 for (i = 0; i < law_max; i++)
102 if ((ccsr_read4(OCP85XX_LAWSR(i)) & 0x80000000) == 0)
108 ccsr_write4(OCP85XX_LAWBAR(i), bar);
109 ccsr_write4(OCP85XX_LAWSR(i), sr);
114 law_disable(int trgt, u_long addr, u_long size)
119 law_max = law_getmax();
120 bar = _LAW_BAR(addr);
121 sr = _LAW_SR(trgt, size);
123 /* Find and disable requested LAW. */
124 for (i = 0; i < law_max; i++)
125 if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
126 bar == ccsr_read4(OCP85XX_LAWBAR(i))) {
127 ccsr_write4(OCP85XX_LAWBAR(i), 0);
128 ccsr_write4(OCP85XX_LAWSR(i), 0);
136 law_pci_target(struct resource *res, int *trgt_mem, int *trgt_io)
142 ver = SVR_VER(mfspr(SPR_SVR));
144 start = rman_get_start(res) & 0xf000;
156 if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
162 if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
170 *trgt_mem = *trgt_io = trgt;