linux-stable-rt/arch/mips/netlogic/xlr/setup.c

/*
 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
 * reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the NetLogic
 * license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/serial_8250.h>
#include <linux/pm.h>

#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/bootinfo.h>
#include <asm/smp-ops.h>

#include <asm/netlogic/interrupt.h>
#include <asm/netlogic/psb-bootinfo.h>

#include <asm/netlogic/xlr/xlr.h>
#include <asm/netlogic/xlr/iomap.h>
#include <asm/netlogic/xlr/pic.h>
#include <asm/netlogic/xlr/gpio.h>

unsigned long netlogic_io_base = (unsigned long)(DEFAULT_NETLOGIC_IO_BASE);
unsigned long nlm_common_ebase = 0x0;
struct psb_info nlm_prom_info;

static void nlm_early_serial_setup(void)
{
	struct uart_port s;
	nlm_reg_t *uart_base;

	uart_base = netlogic_io_mmio(NETLOGIC_IO_UART_0_OFFSET);
	memset(&s, 0, sizeof(s));
	s.flags		= ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
	s.iotype	= UPIO_MEM32;
	s.regshift	= 2;
	s.irq		= PIC_UART_0_IRQ;
	s.uartclk	= PIC_CLKS_PER_SEC;
	s.serial_in	= nlm_xlr_uart_in;
	s.serial_out	= nlm_xlr_uart_out;
	s.mapbase	= (unsigned long)uart_base;
	s.membase	= (unsigned char __iomem *)uart_base;
	early_serial_setup(&s);
}

static void nlm_linux_exit(void)
{
	nlm_reg_t *mmio;

	mmio = netlogic_io_mmio(NETLOGIC_IO_GPIO_OFFSET);
	/* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
	netlogic_write_reg(mmio, NETLOGIC_GPIO_SWRESET_REG, 1);
	for ( ; ; )
		cpu_wait();
}

void __init plat_mem_setup(void)
{
	panic_timeout	= 5;
	_machine_restart = (void (*)(char *))nlm_linux_exit;
	_machine_halt	= nlm_linux_exit;
	pm_power_off	= nlm_linux_exit;
}

const char *get_system_type(void)
{
	return "Netlogic XLR/XLS Series";
}

void __init prom_free_prom_memory(void)
{
	/* Nothing yet */
}

static void build_arcs_cmdline(int *argv)
{
	int i, remain, len;
	char *arg;

	remain = sizeof(arcs_cmdline) - 1;
	arcs_cmdline[0] = '\0';
	for (i = 0; argv[i] != 0; i++) {
		arg = (char *)(long)argv[i];
		len = strlen(arg);
		if (len + 1 > remain)
			break;
		strcat(arcs_cmdline, arg);
		strcat(arcs_cmdline, " ");
		remain -=  len + 1;
	}

	/* Add the default options here */
	if ((strstr(arcs_cmdline, "console=")) == NULL) {
		arg = "console=ttyS0,38400 ";
		len = strlen(arg);
		if (len > remain)
			goto fail;
		strcat(arcs_cmdline, arg);
		remain -= len;
	}
#ifdef CONFIG_BLK_DEV_INITRD
	if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
		arg = "rdinit=/sbin/init ";
		len = strlen(arg);
		if (len > remain)
			goto fail;
		strcat(arcs_cmdline, arg);
		remain -= len;
	}
#endif
	return;
fail:
	panic("Cannot add %s, command line too big!", arg);
}

static void prom_add_memory(void)
{
	struct nlm_boot_mem_map *bootm;
	u64 start, size;
	u64 pref_backup = 512;  /* avoid pref walking beyond end */
	int i;

	bootm = (void *)(long)nlm_prom_info.psb_mem_map;
	for (i = 0; i < bootm->nr_map; i++) {
		if (bootm->map[i].type != BOOT_MEM_RAM)
			continue;
		start = bootm->map[i].addr;
		size   = bootm->map[i].size;

		/* Work around for using bootloader mem */
		if (i == 0 && start == 0 && size == 0x0c000000)
			size = 0x0ff00000;

		add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
	}
}

void __init prom_init(void)
{
	int *argv, *envp;		/* passed as 32 bit ptrs */
	struct psb_info *prom_infop;

	/* truncate to 32 bit and sign extend all args */
	argv = (int *)(long)(int)fw_arg1;
	envp = (int *)(long)(int)fw_arg2;
	prom_infop = (struct psb_info *)(long)(int)fw_arg3;

	nlm_prom_info = *prom_infop;

	nlm_early_serial_setup();
	build_arcs_cmdline(argv);
	nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
	prom_add_memory();

#ifdef CONFIG_SMP
	nlm_wakeup_secondary_cpus(nlm_prom_info.online_cpu_map);
	register_smp_ops(&nlm_smp_ops);
#endif
}