515cbe8673
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. Rename platform_devmap_init() to initarm_devmap_init() to match all the other init routines called from initarm() that are designed to be implemented by platform code. Add a comment block that explains when these routines are called and the type of work expected to be done in each of them.
128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/*-
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* Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@gmail.com>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE 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 THE 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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* from: FreeBSD: //depot/projects/arm/src/sys/arm/ti/ti_machdep.c
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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 <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/armreg.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 0xF0000000
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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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/* Enable cache */
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cpufunc_control(CPU_CONTROL_DC_ENABLE|CPU_CONTROL_IC_ENABLE,
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CPU_CONTROL_DC_ENABLE|CPU_CONTROL_IC_ENABLE);
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}
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#define FDT_DEVMAP_MAX (1 + 2 + 1 + 1)
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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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};
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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 = 0xF0000000;
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fdt_devmap[i].pd_pa = 0x20000000;
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fdt_devmap[i].pd_size = 0x100000;
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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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i++;
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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("No cpu_reset implementation!\n");
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while (1);
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}
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