33724f17d2
- Remove explicit requirement that the SOC registers be found except as an optimization (although the MPC85XX LAW drivers still require they be found externally, which should change). - Remove magic CCSRBAR_VA value. - Allow bus_machdep.c's early-boot code to handle non 1:1 mappings and systems not in real-mode or global 1:1 maps in early boot. - Allow pmap_mapdev() on Book-E to reissue previous addresses if the area is already mapped. Additionally have it check all mappings, not just the CCSR area. This allows the console on e500 systems to actually work on systems where the boot loader was not kind enough to set up a 1:1 mapping before starting the kernel.
183 lines
4.0 KiB
C
183 lines
4.0 KiB
C
/*-
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* Copyright (C) 2008 Semihalf, Rafal Jaworowski
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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 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 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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#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/lock.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/pio.h>
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#include <machine/spr.h>
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#include <dev/fdt/fdt_common.h>
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#include <powerpc/mpc85xx/mpc85xx.h>
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/*
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* MPC85xx system specific routines
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*/
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uint32_t
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ccsr_read4(uintptr_t addr)
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{
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volatile uint32_t *ptr = (void *)addr;
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return (*ptr);
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}
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void
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ccsr_write4(uintptr_t addr, uint32_t val)
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{
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volatile uint32_t *ptr = (void *)addr;
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*ptr = val;
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powerpc_iomb();
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}
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int
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law_getmax(void)
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{
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uint32_t ver;
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ver = SVR_VER(mfspr(SPR_SVR));
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if (ver == SVR_MPC8555E || ver == SVR_MPC8555)
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return (8);
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if (ver == SVR_MPC8548E || ver == SVR_MPC8548 ||
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ver == SVR_MPC8533E || ver == SVR_MPC8533)
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return (10);
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return (12);
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}
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#define _LAW_SR(trgt,size) (0x80000000 | (trgt << 20) | (ffsl(size) - 2))
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#define _LAW_BAR(addr) (addr >> 12)
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int
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law_enable(int trgt, u_long addr, u_long size)
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{
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uint32_t bar, sr;
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int i, law_max;
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if (size == 0)
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return (0);
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law_max = law_getmax();
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bar = _LAW_BAR(addr);
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sr = _LAW_SR(trgt, size);
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/* Bail if already programmed. */
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for (i = 0; i < law_max; i++)
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if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
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bar == ccsr_read4(OCP85XX_LAWBAR(i)))
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return (0);
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/* Find an unused access window. */
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for (i = 0; i < law_max; i++)
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if ((ccsr_read4(OCP85XX_LAWSR(i)) & 0x80000000) == 0)
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break;
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if (i == law_max)
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return (ENOSPC);
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ccsr_write4(OCP85XX_LAWBAR(i), bar);
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ccsr_write4(OCP85XX_LAWSR(i), sr);
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return (0);
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}
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int
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law_disable(int trgt, u_long addr, u_long size)
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{
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uint32_t bar, sr;
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int i, law_max;
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law_max = law_getmax();
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bar = _LAW_BAR(addr);
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sr = _LAW_SR(trgt, size);
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/* Find and disable requested LAW. */
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for (i = 0; i < law_max; i++)
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if (sr == ccsr_read4(OCP85XX_LAWSR(i)) &&
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bar == ccsr_read4(OCP85XX_LAWBAR(i))) {
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ccsr_write4(OCP85XX_LAWBAR(i), 0);
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ccsr_write4(OCP85XX_LAWSR(i), 0);
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return (0);
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}
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return (ENOENT);
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}
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int
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law_pci_target(struct resource *res, int *trgt_mem, int *trgt_io)
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{
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u_long start;
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uint32_t ver;
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int trgt, rv;
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ver = SVR_VER(mfspr(SPR_SVR));
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start = rman_get_start(res) & 0xf000;
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rv = 0;
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trgt = -1;
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switch (start) {
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case 0x8000:
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trgt = 0;
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break;
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case 0x9000:
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trgt = 1;
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break;
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case 0xa000:
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if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
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trgt = 3;
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else
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trgt = 2;
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break;
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case 0xb000:
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if (ver == SVR_MPC8548E || ver == SVR_MPC8548)
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rv = EINVAL;
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else
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trgt = 3;
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break;
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default:
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rv = ENXIO;
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}
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if (rv == 0) {
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*trgt_mem = trgt;
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*trgt_io = trgt;
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}
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return (rv);
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}
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