3733e603fa
We forgot to initialize params to the oftree to actually boot a kernel with devicetree. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
277 lines
6.2 KiB
C
277 lines
6.2 KiB
C
/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <boot.h>
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#include <common.h>
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#include <command.h>
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#include <driver.h>
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#include <environment.h>
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#include <image.h>
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#include <init.h>
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#include <fs.h>
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#include <linux/list.h>
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#include <xfuncs.h>
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#include <malloc.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <memory.h>
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#include <of.h>
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#include <magicvar.h>
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#include <asm/byteorder.h>
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#include <asm/setup.h>
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#include <asm/barebox-arm.h>
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#include <asm/armlinux.h>
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#include <asm/system.h>
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static struct tag *params;
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static void *armlinux_bootparams = NULL;
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#ifndef CONFIG_ENVIRONMENT_VARIABLES
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static int armlinux_architecture;
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static u32 armlinux_system_rev;
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static u64 armlinux_system_serial;
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#endif
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BAREBOX_MAGICVAR(armlinux_architecture, "ARM machine ID");
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BAREBOX_MAGICVAR(armlinux_system_rev, "ARM system revision");
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BAREBOX_MAGICVAR(armlinux_system_serial, "ARM system serial");
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void armlinux_set_architecture(int architecture)
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{
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#ifdef CONFIG_ENVIRONMENT_VARIABLES
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export_env_ull("armlinux_architecture", architecture);
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#else
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armlinux_architecture = architecture;
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#endif
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}
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int armlinux_get_architecture(void)
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{
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#ifdef CONFIG_ENVIRONMENT_VARIABLES
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return getenv_ull("armlinux_architecture");
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#else
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return armlinux_architecture;
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#endif
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}
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void armlinux_set_revision(unsigned int rev)
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{
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#ifdef CONFIG_ENVIRONMENT_VARIABLES
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export_env_ull("armlinux_system_rev", rev);
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#else
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return armlinux_system_rev;
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#endif
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}
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unsigned int armlinux_get_revision(void)
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{
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#ifdef CONFIG_ENVIRONMENT_VARIABLES
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return getenv_ull("armlinux_system_rev");
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#else
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return armlinux_system_rev;
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#endif
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}
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void armlinux_set_serial(u64 serial)
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{
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#ifdef CONFIG_ENVIRONMENT_VARIABLES
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export_env_ull("armlinux_system_serial", serial);
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#else
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armlinux_system_serial = serial;
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#endif
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}
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u64 armlinux_get_serial(void)
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{
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#ifdef CONFIG_ENVIRONMENT_VARIABLES
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return getenv_ull("armlinux_system_serial");
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#else
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return armlinux_system_serial;
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#endif
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}
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static void setup_start_tag(void)
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{
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params = (struct tag *)armlinux_bootparams;
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params->hdr.tag = ATAG_CORE;
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params->hdr.size = tag_size(tag_core);
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params->u.core.flags = 0;
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params->u.core.pagesize = 0;
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params->u.core.rootdev = 0;
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params = tag_next(params);
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}
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static void setup_memory_tags(void)
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{
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struct memory_bank *bank;
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for_each_memory_bank(bank) {
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params->hdr.tag = ATAG_MEM;
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params->hdr.size = tag_size(tag_mem32);
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params->u.mem.start = bank->start;
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params->u.mem.size = bank->size;
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params = tag_next(params);
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}
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}
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static void setup_commandline_tag(const char *commandline, int swap)
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{
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const char *p;
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size_t words;
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if (!commandline)
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return;
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/* eat leading white space */
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for (p = commandline; *p == ' '; p++) ;
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/*
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* skip non-existent command lines so the kernel will still
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* use its default command line.
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*/
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if (*p == '\0')
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return;
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words = (strlen(p) + 1 /* NUL */ + 3 /* round up */) >> 2;
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params->hdr.tag = ATAG_CMDLINE;
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params->hdr.size = (sizeof(struct tag_header) >> 2) + words;
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strcpy(params->u.cmdline.cmdline, p);
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#ifdef CONFIG_BOOT_ENDIANNESS_SWITCH
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if (swap) {
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u32 *cmd = (u32 *)params->u.cmdline.cmdline;
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while (words--)
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cmd[words] = swab32(cmd[words]);
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}
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#endif
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params = tag_next(params);
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}
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static void setup_revision_tag(void)
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{
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u32 system_rev = armlinux_get_revision();
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if (system_rev) {
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params->hdr.tag = ATAG_REVISION;
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params->hdr.size = tag_size(tag_revision);
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params->u.revision.rev = system_rev;
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params = tag_next(params);
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}
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}
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static void setup_serial_tag(void)
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{
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u64 system_serial = armlinux_get_serial();
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if (system_serial) {
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params->hdr.tag = ATAG_SERIAL;
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params->hdr.size = tag_size(tag_serialnr);
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params->u.serialnr.low = system_serial & 0xffffffff;
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params->u.serialnr.high = system_serial >> 32;
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params = tag_next(params);
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}
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}
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static void setup_initrd_tag(unsigned long start, unsigned long size)
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{
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/* an ATAG_INITRD node tells the kernel where the compressed
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* ramdisk can be found. ATAG_RDIMG is a better name, actually.
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*/
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params->hdr.tag = ATAG_INITRD2;
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params->hdr.size = tag_size(tag_initrd);
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params->u.initrd.start = start;
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params->u.initrd.size = size;
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params = tag_next(params);
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}
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static void setup_end_tag (void)
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{
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params->hdr.tag = ATAG_NONE;
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params->hdr.size = 0;
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}
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static void setup_tags(unsigned long initrd_address,
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unsigned long initrd_size, int swap)
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{
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const char *commandline = getenv("bootargs");
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setup_start_tag();
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setup_memory_tags();
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setup_commandline_tag(commandline, swap);
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if (initrd_size)
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setup_initrd_tag(initrd_address, initrd_size);
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setup_revision_tag();
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setup_serial_tag();
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setup_end_tag();
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printf("commandline: %s\n"
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"arch_number: %d\n", commandline, armlinux_get_architecture());
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}
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void armlinux_set_bootparams(void *params)
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{
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armlinux_bootparams = params;
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}
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void start_linux(void *adr, int swap, unsigned long initrd_address,
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unsigned long initrd_size, void *oftree)
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{
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void (*kernel)(int zero, int arch, void *params) = adr;
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void *params = NULL;
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if (oftree) {
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printf("booting Linux kernel with devicetree\n");
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params = oftree;
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} else {
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setup_tags(initrd_address, initrd_size, swap);
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params = armlinux_bootparams;
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}
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shutdown_barebox();
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if (swap) {
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u32 reg;
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__asm__ __volatile__("mrc p15, 0, %0, c1, c0" : "=r" (reg));
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reg ^= CR_B; /* swap big-endian flag */
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__asm__ __volatile__("mcr p15, 0, %0, c1, c0" :: "r" (reg));
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}
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kernel(0, armlinux_get_architecture(), params);
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}
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