314 lines
8.5 KiB
C
314 lines
8.5 KiB
C
/* $NetBSD: imx7_machdep.c,v 1.6 2017/09/08 05:29:12 hkenken Exp $ */
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: imx7_machdep.c,v 1.6 2017/09/08 05:29:12 hkenken Exp $");
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#include "opt_evbarm_boardtype.h"
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#include "opt_arm_debug.h"
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#include "opt_kgdb.h"
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#include "com.h"
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#include "opt_machdep.h"
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#include "opt_imxuart.h"
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#include "imxuart.h"
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#include "opt_imx.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/atomic.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/msgbuf.h>
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#include <sys/reboot.h>
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#include <sys/termios.h>
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#include <dev/cons.h>
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#include <uvm/uvm_extern.h>
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#include <arm/db_machdep.h>
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#include <arm/arm32/machdep.h>
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#include <machine/autoconf.h>
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#include <machine/bootconfig.h>
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#include <arm/imx/imx7var.h>
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#include <arm/imx/imxuartvar.h>
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#include <evbarm/imx7/platform.h>
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extern int _end[];
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extern int KERNEL_BASE_phys[];
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extern int KERNEL_BASE_virt[];
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BootConfig bootconfig;
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static char bootargs[MAX_BOOT_STRING];
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char *boot_args = NULL;
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u_int uboot_args[4] = { 0 };
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/*
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* Macros to translate between physical and virtual for a subset of the
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* kernel address space. *Not* for general use.
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*/
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#define KERN_VTOPDIFF ((vaddr_t)KERNEL_BASE_phys - (vaddr_t)KERNEL_BASE_virt)
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#define KERN_VTOPHYS(va) ((paddr_t)((vaddr_t)va + (vaddr_t)KERN_VTOPDIFF))
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#define KERN_PHYSTOV(pa) ((vaddr_t)((paddr_t)pa - (vaddr_t)KERN_VTOPDIFF))
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#ifndef CONADDR
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#define CONADDR (IMX7_AIPS_BASE + AIPS3_UART1_BASE)
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#endif
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#ifndef CONSPEED
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#define CONSPEED B115200
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#endif
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#ifndef CONMODE
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#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#endif
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void imx7_setup_iomux(void);
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void imx7_setup_gpio(void);
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void imx7board_device_register(device_t, void *);
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#ifdef KGDB
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#include <sys/kgdb.h>
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#endif
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/*
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* Static device mappings. These peripheral registers are mapped at
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* fixed virtual addresses very early in initarm() so that we can use
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* them while booting the kernel, and stay at the same address
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* throughout whole kernel's life time.
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*
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* We use this table twice; once with bootstrap page table, and once
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* with kernel's page table which we build up in initarm().
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*
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* Since we map these registers into the bootstrap page table using
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* pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map
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* registers segment-aligned and segment-rounded in order to avoid
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* using the 2nd page tables.
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*/
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static const struct pmap_devmap devmap[] = {
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{
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KERNEL_IO_IOREG_VBASE,
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IMX7_IOREG_PBASE,
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IMX7_IOREG_SIZE,
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VM_PROT_READ | VM_PROT_WRITE,
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PTE_NOCACHE,
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},
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{
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KERNEL_IO_ARMCORE_VBASE,
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IMX7_ARMCORE_PBASE,
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IMX7_ARMCORE_SIZE,
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VM_PROT_READ | VM_PROT_WRITE,
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PTE_NOCACHE,
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},
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{ 0, 0, 0, 0, 0 }
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};
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#ifdef PMAP_NEED_ALLOC_POOLPAGE
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static struct boot_physmem bp_highgig = {
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.bp_start = IMX7_MEM_BASE / NBPG,
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.bp_pages = (KERNEL_VM_BASE - KERNEL_BASE) / NBPG,
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.bp_freelist = VM_FREELIST_ISADMA,
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.bp_flags = 0,
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};
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#endif
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/*
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* u_int initarm(...)
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*
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* Initial entry point on startup. This gets called before main() is
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* entered.
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* It should be responsible for setting up everything that must be
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* in place when main is called.
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* This includes
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* Taking a copy of the boot configuration structure.
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* Initialising the physical console so characters can be printed.
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* Setting up page tables for the kernel
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*/
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u_int
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initarm(void *arg)
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{
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psize_t memsize;
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pmap_devmap_register(devmap);
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imx7_bootstrap(KERNEL_IO_IOREG_VBASE);
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imx7_setup_iomux();
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imx7_setup_gpio();
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consinit();
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/*
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* Heads up ... Setup the CPU / MMU / TLB functions
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*/
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if (set_cpufuncs()) // starts PMC counter
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panic("cpu not recognized!");
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cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
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#ifdef NO_POWERSAVE
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cpu_do_powersave = 0;
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#endif
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cortex_pmc_ccnt_init();
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printf("\nuboot arg = %#x, %#x, %#x, %#x\n",
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uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]);
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cpu_reset_address = imx7_reset;
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/* Talk to the user */
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printf("\nNetBSD/evbarm (" ___STRING(EVBARM_BOARDTYPE)
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", digprog=0x%08x) booting ...\n", imx7_chip_id());
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#ifdef BOOT_ARGS
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char mi_bootargs[] = BOOT_ARGS;
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parse_mi_bootargs(mi_bootargs);
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#endif /* BOOT_ARGS */
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bootargs[0] = '\0';
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#ifdef VERBOSE_INIT_ARM
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printf("initarm: Configuring system");
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#ifdef MULTIPROCESSOR
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printf(" (%u cpu%s, hatched %#x)",
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arm_cpu_max, arm_cpu_max ? "s" : "",
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arm_cpu_hatched);
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#endif /* MULTIPROCESSOR */
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printf(", CLIDR=%010o CTR=%#x",
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armreg_clidr_read(), armreg_ctr_read());
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printf("\n");
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#endif /* VERBOSE_INIT_ARM */
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#ifdef MEMSIZE
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memsize = MEMSIZE * 1024 * 1024;
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#else
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/*
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* Ugh... but this is better than proceeding using an uninitialized
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* value in memsize, as the code did before I added this branch...
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*/
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#error "MEMSIZE not set"
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#endif
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bootconfig.dramblocks = 1;
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#ifdef MEMSIZE_RESERVED
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/* reserved for Cortex-M4 core */
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memsize -= MEMSIZE_RESERVED * 1024 * 1024;
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bootconfig.dram[0].address = KERN_VTOPHYS(KERNEL_BASE) +
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MEMSIZE_RESERVED * 1024 * 1024;
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#else
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bootconfig.dram[0].address = KERN_VTOPHYS(KERNEL_BASE);
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#endif
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bootconfig.dram[0].pages = memsize / PAGE_SIZE;
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#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
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const bool mapallmem_p = true;
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#ifndef PMAP_NEED_ALLOC_POOLPAGE
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if (memsize > KERNEL_VM_BASE - KERNEL_BASE) {
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printf("%s: dropping RAM size from %luMB to %uMB\n",
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__func__, (unsigned long) (memsize >> 20),
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(KERNEL_VM_BASE - KERNEL_BASE) >> 20);
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memsize = KERNEL_VM_BASE - KERNEL_BASE;
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}
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#endif
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#else /* !__HAVE_MM_MD_DIRECT_MAPPED_PHYS */
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const bool mapallmem_p = false;
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#endif /* __HAVE_MM_MD_DIRECT_MAPPED_PHYS */
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arm32_bootmem_init(bootconfig.dram[0].address,
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memsize, (paddr_t)KERNEL_BASE_phys);
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arm32_kernel_vm_init(KERNEL_VM_BASE, ARM_VECTORS_LOW, 0, devmap,
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mapallmem_p);
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/* we've a specific device_register routine */
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evbarm_device_register = imx7board_device_register;
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#ifdef PMAP_NEED_ALLOC_POOLPAGE
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/*
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* If we couldn't map all of memory via TTBR1, limit the memory the
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* kernel can allocate from to be from the highest available 1GB.
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*/
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if (atop(memsize) > bp_highgig.bp_pages) {
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bp_highgig.bp_start += atop(memsize) - bp_highgig.bp_pages;
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arm_poolpage_vmfreelist = bp_highgig.bp_freelist;
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return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE,
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&bp_highgig, 1);
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}
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#endif
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return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, NULL, 0);
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}
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#ifdef CONSDEVNAME
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const char consdevname[] = CONSDEVNAME;
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#ifndef CONMODE
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#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#endif
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#ifndef CONSPEED
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#define CONSPEED 115200
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#endif
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int consmode = CONMODE;
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int consrate = CONSPEED;
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#endif /* CONSDEVNAME */
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#ifndef IMXUART_FREQ
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#define IMXUART_FREQ 24000000
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#endif
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void
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consinit(void)
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{
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static int consinit_called = 0;
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if (consinit_called)
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return;
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consinit_called = 1;
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#ifdef CONSDEVNAME
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# if NIMXUART > 0
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imxuart_set_frequency(IMXUART_FREQ, 2);
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# endif
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# if (NIMXUART > 0) && defined(IMXUARTCONSOLE)
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if (strcmp(consdevname, CONSDEVNAME) == 0) {
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paddr_t consaddr;
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consaddr = CONADDR;
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imxuart_cnattach(&armv7_generic_bs_tag, consaddr, consrate, consmode);
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return;
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}
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# endif /* (NIMXUART > 0) && defined(IMXUARTCONSOLE) */
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#endif /* CONSDEVNAME */
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}
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