175 lines
3.9 KiB
C
175 lines
3.9 KiB
C
/*-
|
|
* 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 <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <machine/pio.h>
|
|
#include <machine/spr.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;
|
|
|
|
ver = SVR_VER(mfspr(SPR_SVR));
|
|
if (ver == SVR_MPC8555E || ver == SVR_MPC8555)
|
|
return (8);
|
|
if (ver == SVR_MPC8548E || ver == SVR_MPC8548 ||
|
|
ver == SVR_MPC8533E || ver == SVR_MPC8533)
|
|
return (10);
|
|
|
|
return (12);
|
|
}
|
|
|
|
#define _LAW_SR(trgt,size) (0x80000000 | (trgt << 20) | (ffsl(size) - 2))
|
|
#define _LAW_BAR(addr) (addr >> 12)
|
|
|
|
int
|
|
law_enable(int trgt, u_long addr, u_long size)
|
|
{
|
|
uint32_t bar, sr;
|
|
int i, law_max;
|
|
|
|
law_max = law_getmax();
|
|
bar = _LAW_BAR(addr);
|
|
sr = _LAW_SR(trgt, size);
|
|
|
|
/* Bail if already programmed. */
|
|
for (i = 0; i < law_max; i++)
|
|
if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
|
|
bar == ccsr_read4(OCP85XX_LAWBAR(i)))
|
|
return (0);
|
|
|
|
/* Find an unused access window. */
|
|
for (i = 0; i < law_max; i++)
|
|
if ((ccsr_read4(OCP85XX_LAWSR(i)) & 0x80000000) == 0)
|
|
break;
|
|
|
|
if (i == law_max)
|
|
return (ENOSPC);
|
|
|
|
ccsr_write4(OCP85XX_LAWBAR(i), bar);
|
|
ccsr_write4(OCP85XX_LAWSR(i), sr);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
law_disable(int trgt, u_long addr, u_long size)
|
|
{
|
|
uint32_t bar, sr;
|
|
int i, law_max;
|
|
|
|
law_max = law_getmax();
|
|
bar = _LAW_BAR(addr);
|
|
sr = _LAW_SR(trgt, size);
|
|
|
|
/* Find and disable requested LAW. */
|
|
for (i = 0; i < law_max; i++)
|
|
if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
|
|
bar == ccsr_read4(OCP85XX_LAWBAR(i))) {
|
|
ccsr_write4(OCP85XX_LAWBAR(i), 0);
|
|
ccsr_write4(OCP85XX_LAWSR(i), 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 0x8000:
|
|
trgt = 0;
|
|
break;
|
|
case 0x9000:
|
|
trgt = 1;
|
|
break;
|
|
case 0xa000:
|
|
if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
|
|
trgt = 3;
|
|
else
|
|
trgt = 2;
|
|
break;
|
|
case 0xb000:
|
|
if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
|
|
rv = EINVAL;
|
|
else
|
|
trgt = 3;
|
|
break;
|
|
default:
|
|
rv = ENXIO;
|
|
}
|
|
*trgt_mem = *trgt_io = trgt;
|
|
return (rv);
|
|
}
|
|
|