rte_cb.c

microwindows移植到S3C44B0的源码

/*
 * include/asm-v850/rte_cb.c -- Midas lab RTE-CB series of evaluation boards
 *
 *  Copyright (C) 2001,2002  NEC Corporation
 *  Copyright (C) 2001,2002  Miles Bader <[e-mail]>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 * Written by Miles Bader <[e-mail]>
 */

#include <linux/config.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/fs.h>
#include <linux/major.h>

#include <asm/machdep.h>
#include <asm/nb85e_uart.h>

#include "mach.h"

static void led_tick (void);

#ifdef CONFIG_RTE_CB_MULTI
extern void multi_init (void);
#endif


#ifdef CONFIG_ROM_KERNEL
/* Initialization for kernel in ROM.  */
static inline rom_kernel_init (void)
{
	/* If the kernel is in ROM, we have to copy any initialized data
	   from ROM into RAM.  */
	extern unsigned long _data_load_start, _sdata, _edata;
	register unsigned long *src = &_data_load_start;
	register unsigned long *dst = &_sdata, *end = &_edata;

	while (dst != end)
		*dst++ = *src++;
}
#endif /* CONFIG_ROM_KERNEL */

void __init mach_early_init (void)
{
	nb85e_intc_disable_irqs ();

#if defined (CONFIG_ROM_KERNEL)
	rom_kernel_init ();
#elif defined (CONFIG_RTE_CB_MULTI)
	multi_init ();
#endif
}

void __init mach_setup (char **cmdline)
{
	printk (KERN_INFO
		"CPU: %s\n"
		"Platform: %s%s\n",
		CPU_MODEL_LONG,
		PLATFORM_LONG,
#ifdef CONFIG_ROM_KERNEL
		""
#elif defined (CONFIG_RTE_CB_MULTI)
		" (with Multi ROM monitor)"
#else
		" (with ROM monitor)"
#endif		
		);

	/* Probe for Mother-A, and print a message if we find it.  */
	*(volatile long *)MB_A_SRAM_ADDR = 0xDEADBEEF;
	if (*(volatile long *)MB_A_SRAM_ADDR == 0xDEADBEEF) {
		*(volatile long *)MB_A_SRAM_ADDR = 0x12345678;
		if (*(volatile long *)MB_A_SRAM_ADDR == 0x12345678)
			printk (KERN_INFO
				"          NEC SolutionGear/Midas lab"
				" RTE-MOTHER-A motherboard\n");
	}

#if defined (CONFIG_V850E_NB85E_UART) && !defined (CONFIG_TIME_BOOTUP)
	nb85e_uart_cons_init ();
#endif

	mach_tick = led_tick;

	ROOT_DEV = MKDEV (BLKMEM_MAJOR, 0);
}

#ifdef CONFIG_TIME_BOOTUP
void initial_boot_done (void)
{
#ifdef CONFIG_V850E_NB85E_UART
	nb85e_uart_cons_init ();
#endif
}
#endif

void machine_restart (char *__unused)
{
#ifdef CONFIG_RESET_GUARD
	disable_reset_guard ();
#endif
	asm ("jmp r0"); /* Jump to the reset vector.  */
}

void machine_halt (void)
{
#ifdef CONFIG_RESET_GUARD
	disable_reset_guard ();
#endif
	for (;;)
		asm ("halt; nop; nop; nop; nop; nop");
}

void machine_power_off (void)
{
	machine_halt ();
}


/* Animated LED display for timer tick.  */

#define TICK_UPD_FREQ	6
static int tick_frames[][10] = {
	{ 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, -1 },
	{ 0x63, 0x5c, -1 },
	{ 0x5c, 0x00, -1 },
	{ 0x63, 0x00, -1 },
	{ -1 }
};

/* LED access routines.  */
extern unsigned read_leds (int pos, char *buf, int len);
extern unsigned write_leds (int pos, const char *buf, int len);

static void led_tick ()
{
	static unsigned counter = 0;
	
	if (++counter == (HZ / TICK_UPD_FREQ)) {
		/* Which frame we're currently displaying for each digit.  */
		static unsigned frame_nums[LED_NUM_DIGITS] = { 0 };
		/* Display image.  */
		static unsigned char image[LED_NUM_DIGITS] = { 0 };
		unsigned char prev_image[LED_NUM_DIGITS];
		int write_to_leds = 1; /* true if we should actually display */
		int digit;

		/* We check to see if the physical LEDs contains what we last
		   wrote to them; if not, we suppress display (this is so that
		   users can write to the LEDs, and not have their output
		   overwritten).  As a special case, we start writing again if
		   all the LEDs are blank, or our display image is all zeros
		   (indicating that this is the initial update, when the actual
		   LEDs might contain random data).  */
		read_leds (0, prev_image, LED_NUM_DIGITS);
		for (digit = 0; digit < LED_NUM_DIGITS; digit++)
			if (image[digit] != prev_image[digit]
			    && image[digit] && prev_image[digit])
			{
				write_to_leds = 0;
				break;
			}

		/* Update display image.  */
		for (digit = 0;
		     digit < LED_NUM_DIGITS && tick_frames[digit][0] >= 0;
		     digit++)
		{
			int frame = tick_frames[digit][frame_nums[digit]];
			if (frame < 0) {
				image[digit] = tick_frames[digit][0];
				frame_nums[digit] = 1;
			} else {
				image[digit] = frame;
				frame_nums[digit]++;
				break;
			}
		}

		if (write_to_leds)
			/* Write the display image to the physical LEDs.  */
			write_leds (0, image, LED_NUM_DIGITS);

		counter = 0;
	}
}


/* Mother-A interrupts.  */

#ifdef CONFIG_RTE_GBUS_INT

#define L GBUS_INT_PRIORITY_LOW
#define M GBUS_INT_PRIORITY_MEDIUM
#define H GBUS_INT_PRIORITY_HIGH

static struct gbus_int_irq_init gbus_irq_inits[] = {
#ifdef CONFIG_RTE_MB_A_PCI
	{ "MB_A_LAN",	IRQ_MB_A_LAN,		1,			L },
	{ "MB_A_PCI1",	IRQ_MB_A_PCI1(0),	IRQ_MB_A_PCI1_NUM,	L },
	{ "MB_A_PCI2",	IRQ_MB_A_PCI2(0),	IRQ_MB_A_PCI2_NUM,	L },
	{ "MB_A_EXT",	IRQ_MB_A_EXT(0),	IRQ_MB_A_EXT_NUM,	L },
	{ "MB_A_USB_OC",IRQ_MB_A_USB_OC(0),	IRQ_MB_A_USB_OC_NUM,	L },
	{ "MB_A_PCMCIA_OC",IRQ_MB_A_PCMCIA_OC,	1,			L },
#endif
	{ 0 }
};
#define NUM_GBUS_IRQ_INITS  \
   ((sizeof gbus_irq_inits / sizeof gbus_irq_inits[0]) - 1)

static struct hw_interrupt_type gbus_hw_itypes[NUM_GBUS_IRQ_INITS];

#endif /* CONFIG_RTE_GBUS_INT */

void __init rte_cb_init_irqs (void)
{
#ifdef CONFIG_RTE_GBUS_INT
	gbus_int_init_irqs ();
	gbus_int_init_irq_types (gbus_irq_inits, gbus_hw_itypes);
#endif /* CONFIG_RTE_GBUS_INT */
}