setup.c

linux-2.4.29操作系统的源码

/*
 * setup.c
 *
 * BRIEF MODULE DESCRIPTION
 * Momentum Computer Jaguar-ATX board dependent boot routines
 *
 * Copyright (C) 1996, 1997, 2001  Ralf Baechle
 * Copyright (C) 2000 RidgeRun, Inc.
 * Copyright (C) 2001 Red Hat, Inc.
 * Copyright (C) 2002 Momentum Computer
 *
 * Author: Matthew Dharm, Momentum Computer
 *   [e-mail]
 *
 * Louis Hamilton, Red Hat, Inc.
 *   [e-mail]  [MIPS64 modifications]
 *
 * Author: RidgeRun, Inc.
 *   [e-mail], [e-mail], [e-mail]
 *
 * Copyright 2001 MontaVista Software Inc.
 * Author: [e-mail] or [e-mail]
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``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   THE AUTHOR  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.
 *
 *  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.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mc146818rtc.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/timex.h>
#include <linux/vmalloc.h>
#include <asm/time.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pci.h>
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/reboot.h>
#include <asm/mc146818rtc.h>
#include <linux/version.h>
#include <linux/bootmem.h>
#include <linux/blk.h>
#include <asm/mv64340.h>
#include "jaguar_atx_fpga.h"


unsigned long mv64340_base;
extern unsigned long mv64340_sram_base;
unsigned long cpu_clock;

/* These functions are used for rebooting or halting the machine*/
extern void momenco_jaguar_restart(char *command);
extern void momenco_jaguar_halt(void);
extern void momenco_jaguar_power_off(void);

void momenco_time_init(void);

static char reset_reason;

#define ENTRYLO(x) ((pte_val(mk_pte_phys((x), PAGE_KERNEL_UNCACHED)) >> 6)|1)

void __init bus_error_init(void) { /* nothing */ }

/* setup code for a handoff from a version 2 PMON 2000 PROM */
void PMON_v2_setup(void)
{
	/* Some wired TLB entries for the MV64340 and perhiperals. The
	   MV64340 is going to be hit on every IRQ anyway - there's
	   absolutely no point in letting it be a random TLB entry, as
	   it'll just cause needless churning of the TLB. And we use
	   the other half for the serial port, which is just a PITA
	   otherwise :)

		Device			Physical	Virtual
		MV64340 Internal Regs	0xf4000000	0xf4000000
		Ocelot-C[S] PLD (CS0)	0xfc000000	0xfc000000
		NVRAM (CS1)		0xfc800000	0xfc800000
		UARTs (CS2)		0xfd000000	0xfd000000
		Internal SRAM		0xfe000000	0xfe000000
		M-Systems DOC (CS3)	0xff000000	0xff000000
	*/
  printk("PMON_v2_setup\n");

#ifdef CONFIG_MIPS64
	/* marvell and extra space */
	add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xfffffffff4000000, PM_64K);
	/* fpga, rtc, and uart */
	add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfffffffffc000000, PM_16M);
	/* m-sys and internal SRAM */
	add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfffffffffe000000, PM_16M);

	mv64340_base = 0xfffffffff4000000;
	mv64340_sram_base = 0xfffffffffe000000;
#else
	/* marvell and extra space */
	add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K);
	/* fpga, rtc, and uart */
	add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfc000000, PM_16M);
	/* m-sys and internal SRAM */
	add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfe000000, PM_16M);

	mv64340_base = 0xf4000000;
	mv64340_sram_base = 0xfe000000;
#endif
}

#define CONV_BCD_TO_BIN(val)	(((val) & 0xf) + (((val) >> 4) * 10))
#define CONV_BIN_TO_BCD(val)	(((val) % 10) + (((val) / 10) << 4))

unsigned long m48t37y_get_time(void)
{
#ifdef CONFIG_MIPS64
	unsigned char *rtc_base = (unsigned char*)0xfffffffffc800000;
#else
	unsigned char *rtc_base = (unsigned char*)0xfc800000;
#endif
	unsigned int year, month, day, hour, min, sec;

	/* stop the update */
	rtc_base[0x7ff8] = 0x40;

	year = CONV_BCD_TO_BIN(rtc_base[0x7fff]);
	year += CONV_BCD_TO_BIN(rtc_base[0x7ff1]) * 100;

	month = CONV_BCD_TO_BIN(rtc_base[0x7ffe]);

	day = CONV_BCD_TO_BIN(rtc_base[0x7ffd]);

	hour = CONV_BCD_TO_BIN(rtc_base[0x7ffb]);
	min = CONV_BCD_TO_BIN(rtc_base[0x7ffa]);
	sec = CONV_BCD_TO_BIN(rtc_base[0x7ff9]);

	/* start the update */
	rtc_base[0x7ff8] = 0x00;

	return mktime(year, month, day, hour, min, sec);
}

int m48t37y_set_time(unsigned long sec)
{
#ifdef CONFIG_MIPS64
	unsigned char *rtc_base = (unsigned char*)0xfffffffffc800000;
#else
	unsigned char *rtc_base = (unsigned char*)0xfc800000;
#endif
	struct rtc_time tm;

	/* convert to a more useful format -- note months count from 0 */
	to_tm(sec, &tm);
	tm.tm_mon += 1;

	/* enable writing */
	rtc_base[0x7ff8] = 0x80;

	/* year */
	rtc_base[0x7fff] = CONV_BIN_TO_BCD(tm.tm_year % 100);
	rtc_base[0x7ff1] = CONV_BIN_TO_BCD(tm.tm_year / 100);

	/* month */
	rtc_base[0x7ffe] = CONV_BIN_TO_BCD(tm.tm_mon);

	/* day */
	rtc_base[0x7ffd] = CONV_BIN_TO_BCD(tm.tm_mday);

	/* hour/min/sec */
	rtc_base[0x7ffb] = CONV_BIN_TO_BCD(tm.tm_hour);
	rtc_base[0x7ffa] = CONV_BIN_TO_BCD(tm.tm_min);
	rtc_base[0x7ff9] = CONV_BIN_TO_BCD(tm.tm_sec);

	/* day of week -- not really used, but let's keep it up-to-date */
	rtc_base[0x7ffc] = CONV_BIN_TO_BCD(tm.tm_wday + 1);

	/* disable writing */
	rtc_base[0x7ff8] = 0x00;

	return 0;
}

void momenco_timer_setup(struct irqaction *irq)
{
	setup_irq(8, irq);
}

void momenco_time_init(void)
{
	mips_hpt_frequency = cpu_clock / 2;
	board_timer_setup = momenco_timer_setup;

	rtc_get_time = m48t37y_get_time;
	rtc_set_time = m48t37y_set_time;
}

void __init momenco_jaguar_atx_setup(void)
{
	unsigned int tmpword;

	board_time_init = momenco_time_init;

	_machine_restart = momenco_jaguar_restart;
	_machine_halt = momenco_jaguar_halt;
	_machine_power_off = momenco_jaguar_power_off;

	/*
	 * initrd_start = (ulong)jaguar_initrd_start;
	 * initrd_end = (ulong)jaguar_initrd_start + (ulong)jaguar_initrd_size;
	 * initrd_below_start_ok = 1;
	 */

	/* do handoff reconfiguration */
	PMON_v2_setup();

	/* shut down ethernet ports, just to be sure our memory doesn't get
	 * corrupted by random ethernet traffic.
	 */
	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(2), 0xff << 8);
	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(2), 0xff << 8);
	do {}
	  while (MV_READ_DATA(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
	do {}
	  while (MV_READ_DATA(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
	do {}
	  while (MV_READ_DATA(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(2)) & 0xff);
	do {}
	  while (MV_READ_DATA(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
	do {}
	  while (MV_READ_DATA(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
	do {}
	  while (MV_READ_DATA(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(2)) & 0xff);
	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0), MV_READ_DATA(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1), MV_READ_DATA(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);
	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(2), MV_READ_DATA(MV64340_ETH_PORT_SERIAL_CONTROL_REG(2)) & ~1);

	/* Turn off the Bit-Error LED */
	JAGUAR_FPGA_WRITE(0x80, CLR);

	tmpword = JAGUAR_FPGA_READ(BOARDREV);
	if (tmpword < 26)
		printk("Momentum Jaguar-ATX: Board Assembly Rev. %c\n",
			'A'+tmpword);
	else
		printk("Momentum Jaguar-ATX: Board Assembly Revision #0x%x\n",
			tmpword);

	tmpword = JAGUAR_FPGA_READ(FPGA_REV);
	printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
	tmpword = JAGUAR_FPGA_READ(RESET_STATUS);
	printk("Reset reason: 0x%x\n", tmpword);
	switch (tmpword) {
		case 0x1:
			printk("  - Power-up reset\n");
			break;
		case 0x2:
			printk("  - Push-button reset\n");
			break;
		case 0x8:
			printk("  - Watchdog reset\n");
			break;
		case 0x10:
			printk("  - JTAG reset\n");
			break;
		default:
			printk("  - Unknown reset cause\n");
	}
	reset_reason = tmpword;
	JAGUAR_FPGA_WRITE(0xff, RESET_STATUS);

	tmpword = JAGUAR_FPGA_READ(BOARD_STATUS);
	printk("Board Status register: 0x%02x\n", tmpword);
	printk("  - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
	printk("  - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");

	/* 256MiB of RM9000x2 DDR */
//	add_memory_region(0x0, 0x100<<20, BOOT_MEM_RAM);

	/* 128MiB of MV-64340 DDR */
//	add_memory_region(0x100<<20, 0x80<<20, BOOT_MEM_RAM);

	/* XXX Memory configuration should be picked up from PMON2k */
#ifdef CONFIG_JAGUAR_DMALOW
	printk("Jaguar ATX DMA-low mode set\n");
	add_memory_region(0x00000000, 0x08000000, BOOT_MEM_RAM);
	add_memory_region(0x08000000, 0x10000000, BOOT_MEM_RAM);
#else
	/* 128MiB of MV-64340 DDR RAM */
	printk("Jaguar ATX DMA-low mode is not set\n");
	add_memory_region(0x100<<20, 0x80<<20, BOOT_MEM_RAM);
#endif

#ifdef GEMDEBUG_TRACEBUFFER
	{
	  unsigned int tbControl;
	  tbControl = 
	    0 << 26 |  /* post trigger delay 0 */
	    	    0x2 << 16 |		/* sequential trace mode */
	    //	    0x0 << 16 |		/* non-sequential trace mode */
	    //	    0xf << 4 |		/* watchpoints disabled */
	    2 << 2 |		/* armed */
	    2 ;			/* interrupt disabled  */
	  printk ("setting     tbControl = %08lx\n", tbControl);
	  write_32bit_cp0_set1_register($22, tbControl);
	  __asm__ __volatile__(".set noreorder\n\t" \
			       "nop; nop; nop; nop; nop; nop;\n\t" \
			       "nop; nop; nop; nop; nop; nop;\n\t" \
			       ".set reorder\n\t");

	}
#endif
}


#ifndef CONFIG_MIPS64
/* This needs to be one of the first initcalls, because no I/O port access
   can work before this */
static int io_base_ioremap(void)
{
	/* we're mapping PCI accesses from 0xc0000000 to 0xf0000000 */
	void *io_remap_range = ioremap(0xc0000000, 0x30000000);

	printk("*** io_base_ioremap\n");
	if (!io_remap_range) {
		panic("Could not ioremap I/O port range");
	}
	printk("io_remap_range set at 0x%08x\n", (uint32_t)io_remap_range);
	set_io_port_base(io_remap_range - 0xc0000000);

	return 0;
}

module_init(io_base_ioremap);
#endif