1/*
  2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
  3 * reserved.
  4 *
  5 * This software is available to you under a choice of one of two
  6 * licenses.  You may choose to be licensed under the terms of the GNU
  7 * General Public License (GPL) Version 2, available from the file
  8 * COPYING in the main directory of this source tree, or the NetLogic
  9 * license below:
 10 *
 11 * Redistribution and use in source and binary forms, with or without
 12 * modification, are permitted provided that the following conditions
 13 * are met:
 14 *
 15 * 1. Redistributions of source code must retain the above copyright
 16 *    notice, this list of conditions and the following disclaimer.
 17 * 2. Redistributions in binary form must reproduce the above copyright
 18 *    notice, this list of conditions and the following disclaimer in
 19 *    the documentation and/or other materials provided with the
 20 *    distribution.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 25 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 33 */
 34
 35#include <linux/kernel.h>
 36#include <linux/serial_8250.h>
 37#include <linux/pm.h>
 38
 39#include <asm/reboot.h>
 40#include <asm/time.h>
 41#include <asm/bootinfo.h>
 42#include <asm/smp-ops.h>
 43
 44#include <asm/netlogic/interrupt.h>
 45#include <asm/netlogic/psb-bootinfo.h>
 46
 47#include <asm/netlogic/xlr/xlr.h>
 48#include <asm/netlogic/xlr/iomap.h>
 49#include <asm/netlogic/xlr/pic.h>
 50#include <asm/netlogic/xlr/gpio.h>
 51
 52unsigned long netlogic_io_base = (unsigned long)(DEFAULT_NETLOGIC_IO_BASE);
 53unsigned long nlm_common_ebase = 0x0;
 54struct psb_info nlm_prom_info;
 55
 56static void nlm_early_serial_setup(void)
 57{
 58	struct uart_port s;
 59	nlm_reg_t *uart_base;
 60
 61	uart_base = netlogic_io_mmio(NETLOGIC_IO_UART_0_OFFSET);
 62	memset(&s, 0, sizeof(s));
 63	s.flags		= ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
 64	s.iotype	= UPIO_MEM32;
 65	s.regshift	= 2;
 66	s.irq		= PIC_UART_0_IRQ;
 67	s.uartclk	= PIC_CLKS_PER_SEC;
 68	s.serial_in	= nlm_xlr_uart_in;
 69	s.serial_out	= nlm_xlr_uart_out;
 70	s.mapbase	= (unsigned long)uart_base;
 71	s.membase	= (unsigned char __iomem *)uart_base;
 72	early_serial_setup(&s);
 73}
 74
 75static void nlm_linux_exit(void)
 76{
 77	nlm_reg_t *mmio;
 78
 79	mmio = netlogic_io_mmio(NETLOGIC_IO_GPIO_OFFSET);
 80	/* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
 81	netlogic_write_reg(mmio, NETLOGIC_GPIO_SWRESET_REG, 1);
 82	for ( ; ; )
 83		cpu_wait();
 84}
 85
 86void __init plat_mem_setup(void)
 87{
 88	panic_timeout	= 5;
 89	_machine_restart = (void (*)(char *))nlm_linux_exit;
 90	_machine_halt	= nlm_linux_exit;
 91	pm_power_off	= nlm_linux_exit;
 92}
 93
 94const char *get_system_type(void)
 95{
 96	return "Netlogic XLR/XLS Series";
 97}
 98
 99void __init prom_free_prom_memory(void)
100{
101	/* Nothing yet */
102}
103
104static void build_arcs_cmdline(int *argv)
105{
106	int i, remain, len;
107	char *arg;
108
109	remain = sizeof(arcs_cmdline) - 1;
110	arcs_cmdline[0] = '\0';
111	for (i = 0; argv[i] != 0; i++) {
112		arg = (char *)(long)argv[i];
113		len = strlen(arg);
114		if (len + 1 > remain)
115			break;
116		strcat(arcs_cmdline, arg);
117		strcat(arcs_cmdline, " ");
118		remain -=  len + 1;
119	}
120
121	/* Add the default options here */
122	if ((strstr(arcs_cmdline, "console=")) == NULL) {
123		arg = "console=ttyS0,38400 ";
124		len = strlen(arg);
125		if (len > remain)
126			goto fail;
127		strcat(arcs_cmdline, arg);
128		remain -= len;
129	}
130#ifdef CONFIG_BLK_DEV_INITRD
131	if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
132		arg = "rdinit=/sbin/init ";
133		len = strlen(arg);
134		if (len > remain)
135			goto fail;
136		strcat(arcs_cmdline, arg);
137		remain -= len;
138	}
139#endif
140	return;
141fail:
142	panic("Cannot add %s, command line too big!", arg);
143}
144
145static void prom_add_memory(void)
146{
147	struct nlm_boot_mem_map *bootm;
148	u64 start, size;
149	u64 pref_backup = 512;  /* avoid pref walking beyond end */
150	int i;
151
152	bootm = (void *)(long)nlm_prom_info.psb_mem_map;
153	for (i = 0; i < bootm->nr_map; i++) {
154		if (bootm->map[i].type != BOOT_MEM_RAM)
155			continue;
156		start = bootm->map[i].addr;
157		size   = bootm->map[i].size;
158
159		/* Work around for using bootloader mem */
160		if (i == 0 && start == 0 && size == 0x0c000000)
161			size = 0x0ff00000;
162
163		add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
164	}
165}
166
167void __init prom_init(void)
168{
169	int *argv, *envp;		/* passed as 32 bit ptrs */
170	struct psb_info *prom_infop;
171
172	/* truncate to 32 bit and sign extend all args */
173	argv = (int *)(long)(int)fw_arg1;
174	envp = (int *)(long)(int)fw_arg2;
175	prom_infop = (struct psb_info *)(long)(int)fw_arg3;
176
177	nlm_prom_info = *prom_infop;
178
179	nlm_early_serial_setup();
180	build_arcs_cmdline(argv);
181	nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
182	prom_add_memory();
183
184#ifdef CONFIG_SMP
185	nlm_wakeup_secondary_cpus(nlm_prom_info.online_cpu_map);
186	register_smp_ops(&nlm_smp_ops);
187#endif
188}