f1d49f684d
Call initarm_lastaddr() later in the init sequence, after establishing static device mappings, rather than as the first of the initializations that a platform can hook into. This allows a platform to allocate KVA from the top of the address space downwards for things like static device mapping, and return the final "last usable address" result after that and other early init work is done. Because some platforms were doing work in initarm_lastaddr() that needs to be done early, add a new initarm_early_init() routine and move the early init code to that routine on those platforms. Make PTE_DEVICE a synonym for PTE_NOCACHE on armv4, to make it easier to share the same code on both architectures. Add new helper routines for arm static device mapping. The new code allocates kva space from the top down for the device mappings and builds entries in an internal table which is automatically used later by arm_devmap_bootstrap(). The platform code just calls the new arm_devmap_add_entry() function as many times as it needs to (up to 32 entries allowed; most platforms use 2 or 3 at most). Remove imx local devmap code and use the essentially identical common code that got moved from imx_machdep.c to arm/devmap.c.
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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*/
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#include "opt_ddb.h"
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#include "opt_platform.h"
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#include "opt_global.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define _ARM32_BUS_DMA_PRIVATE
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/devmap.h>
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#include <machine/machdep.h>
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#include <dev/fdt/fdt_common.h>
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/* Start of address space used for bootstrap map */
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#define DEVMAP_BOOTSTRAP_MAP_START 0xE0000000
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vm_offset_t
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initarm_lastaddr(void)
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{
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return (DEVMAP_BOOTSTRAP_MAP_START);
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}
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void
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initarm_early_init(void)
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{
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}
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void
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initarm_gpio_init(void)
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{
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}
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void
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initarm_late_init(void)
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{
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}
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#define FDT_DEVMAP_MAX (2) /* FIXME */
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static struct arm_devmap_entry fdt_devmap[FDT_DEVMAP_MAX] = {
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{ 0, 0, 0, 0, 0, },
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{ 0, 0, 0, 0, 0, }
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};
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/*
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* Construct pmap_devmap[] with DT-derived config data.
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*/
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int
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initarm_devmap_init(void)
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{
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int i = 0;
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fdt_devmap[i].pd_va = 0xf0100000;
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fdt_devmap[i].pd_pa = 0x10100000;
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fdt_devmap[i].pd_size = 0x01000000; /* 1 MB */
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fdt_devmap[i].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
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fdt_devmap[i].pd_cache = PTE_DEVICE;
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arm_devmap_register_table(&fdt_devmap[0]);
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return (0);
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}
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struct arm32_dma_range *
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bus_dma_get_range(void)
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{
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return (NULL);
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}
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int
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bus_dma_get_range_nb(void)
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{
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return (0);
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}
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void
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cpu_reset()
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{
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printf("cpu_reset\n");
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while (1);
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}
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