text: /*
   * Carsten Langgaard, carstenl@mips.com
   * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
   * Copyright (C) 2008 Dmitri Vorobiev
   *
   *  This program is free software; you can distribute it and/or modify it
   *  under the terms of the GNU General Public License (Version 2) as
   *  published by the Free Software Foundation.
   *
   *  This program is distributed in the hope it will be useful, but WITHOUT
   *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   *  for more details.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
   */
  #include <linux/cpu.h>
  #include <linux/init.h>
  #include <linux/sched.h>
  #include <linux/ioport.h>
  #include <linux/irq.h>
  #include <linux/pci.h>
  #include <linux/screen_info.h>
  #include <linux/time.h>
  
  #include <asm/bootinfo.h>
  #include <asm/mips-boards/generic.h>
  #include <asm/mips-boards/prom.h>
  #include <asm/mips-boards/malta.h>
  #include <asm/mips-boards/maltaint.h>
  #include <asm/dma.h>
  #include <asm/traps.h>
  #ifdef CONFIG_VT
  #include <linux/console.h>
  #endif
  
  extern void malta_be_init(void);
  extern int malta_be_handler(struct pt_regs *regs, int is_fixup);
  
  static struct resource standard_io_resources[] = {
  	{
  		.name = "dma1",
  		.start = 0x00,
  		.end = 0x1f,
  		.flags = IORESOURCE_BUSY
  	},
  	{
  		.name = "timer",
  		.start = 0x40,
  		.end = 0x5f,
  		.flags = IORESOURCE_BUSY
  	},
  	{
  		.name = "keyboard",
  		.start = 0x60,
  		.end = 0x6f,
  		.flags = IORESOURCE_BUSY
  	},
  	{
  		.name = "dma page reg",
  		.start = 0x80,
  		.end = 0x8f,
  		.flags = IORESOURCE_BUSY
  	},
  	{
  		.name = "dma2",
  		.start = 0xc0,
  		.end = 0xdf,
  		.flags = IORESOURCE_BUSY
  	},
  };
  
  const char *get_system_type(void)
  {
  	return "MIPS Malta";
  }
  
  #if defined(CONFIG_MIPS_MT_SMTC)
  const char display_string[] = "       SMTC LINUX ON MALTA       ";
  #else
  const char display_string[] = "        LINUX ON MALTA       ";
  #endif /* CONFIG_MIPS_MT_SMTC */
  
  #ifdef CONFIG_BLK_DEV_FD
  static void __init fd_activate(void)
  {
  	/*
  	 * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
  	 * Controller.
  	 * Done by YAMON 2.00 onwards
  	 */
  	/* Entering config state. */
  	SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);
  
  	/* Activate floppy controller. */
  	SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
  	SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
  	SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
  	SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);
  
  	/* Exit config state. */
  	SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
  }
  #endif
  
  #ifdef CONFIG_BLK_DEV_IDE
  static void __init pci_clock_check(void)
  {
  	unsigned int __iomem *jmpr_p =
  		(unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
  	int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
  	static const int pciclocks[] __initdata = {
  		33, 20, 25, 30, 12, 16, 37, 10
  	};
  	int pciclock = pciclocks[jmpr];
  	char *argptr = prom_getcmdline();
  
  	if (pciclock != 33 && !strstr(argptr, "idebus=")) {
  		printk(KERN_WARNING "WARNING: PCI clock is %dMHz, "
  				"setting idebus\n", pciclock);
  		argptr += strlen(argptr);
  		sprintf(argptr, " idebus=%d", pciclock);
  		if (pciclock < 20 || pciclock > 66)
  			printk(KERN_WARNING "WARNING: IDE timing "
  					"calculations will be incorrect\n");
  	}
  }
  #endif
  
  #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
  static void __init screen_info_setup(void)
  {
  	screen_info = (struct screen_info) {
  		.orig_x = 0,
  		.orig_y = 25,
  		.ext_mem_k = 0,
  		.orig_video_page = 0,
  		.orig_video_mode = 0,
  		.orig_video_cols = 80,
  		.unused2 = 0,
  		.orig_video_ega_bx = 0,
  		.unused3 = 0,
  		.orig_video_lines = 25,
  		.orig_video_isVGA = VIDEO_TYPE_VGAC,
  		.orig_video_points = 16
  	};
  }
  #endif
  
  static void __init bonito_quirks_setup(void)
  {
  	char *argptr;
  
  	argptr = prom_getcmdline();
  	if (strstr(argptr, "debug")) {
  		BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
  		printk(KERN_INFO "Enabled Bonito debug mode\n");
  	} else
  		BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
  
  #ifdef CONFIG_DMA_COHERENT
  	if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
  		BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
  		printk(KERN_INFO "Enabled Bonito CPU coherency\n");
  
  		argptr = prom_getcmdline();
  		if (strstr(argptr, "iobcuncached")) {
  			BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
  			BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
  				~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
  					BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
  			printk(KERN_INFO "Disabled Bonito IOBC coherency\n");
  		} else {
  			BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
  			BONITO_PCIMEMBASECFG |=
  				(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
  					BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
  			printk(KERN_INFO "Enabled Bonito IOBC coherency\n");
  		}
  	} else
  		panic("Hardware DMA cache coherency not supported");
  #endif
  }
  
  void __init plat_mem_setup(void)
  {
  	unsigned int i;
  
  	mips_pcibios_init();
  
  	/* Request I/O space for devices used on the Malta board. */
  	for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
  		request_resource(&ioport_resource, standard_io_resources+i);
  
  	/*
  	 * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
  	 */
  	enable_dma(4);
  
  #ifdef CONFIG_DMA_COHERENT
  	if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO)
  		panic("Hardware DMA cache coherency not supported");
  #endif
  
  	if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
  		bonito_quirks_setup();
  
  #ifdef CONFIG_BLK_DEV_IDE
  	pci_clock_check();
  #endif
  
  #ifdef CONFIG_BLK_DEV_FD
  	fd_activate();
  #endif
  
  #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
  	screen_info_setup();
  #endif
  
  	board_be_init = malta_be_init;
  	board_be_handler = malta_be_handler;
  }
  