patch-2.4.1 linux/arch/ppc/kernel/gemini_setup.c

• Lines: 563
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0/linux/arch/ppc/kernel/gemini_setup.c
• Orig date: Sun Sep 17 09:48:06 2000

diff -u --recursive --new-file v2.4.0/linux/arch/ppc/kernel/gemini_setup.c linux/arch/ppc/kernel/gemini_setup.c
@@ -1,562 +0,0 @@
-/*
- *  linux/arch/ppc/kernel/setup.c
- *
- *  Copyright (C) 1995 Linus Torvalds
- *  Adapted from 'alpha' version by Gary Thomas
- *  Modified by Cort Dougan (cort@cs.nmt.edu)
- *  Synergy Microsystems board support by Dan Cox (dan@synergymicro.com)
- *
- */
-
-#include <linux/config.h>
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h> 
-#include <linux/reboot.h>
-#include <linux/pci.h>
-#include <linux/time.h>
-#include <linux/kdev_t.h>
-#include <linux/types.h>
-#include <linux/major.h>
-#include <linux/blk.h>
-#include <linux/console.h>
-#include <linux/openpic.h>
-
-#include <asm/system.h>
-#include <asm/pgtable.h>
-#include <asm/page.h>
-#include <asm/dma.h>
-#include <asm/io.h>
-#include <asm/m48t35.h>
-#include <asm/gemini.h>
-
-#include <asm/time.h>
-#include "local_irq.h"
-#include "open_pic.h"
-
-void gemini_setup_pci_ptrs(void);
-static int gemini_get_clock_speed(void);
-extern void gemini_pcibios_fixup(void);
-
-static char *gemini_board_families[] = {
-  "VGM", "VSS", "KGM", "VGR", "VCM", "VCS", "KCM", "VCR"
-};
-static int gemini_board_count = sizeof(gemini_board_families) /
-                                 sizeof(gemini_board_families[0]);
-
-static unsigned int cpu_7xx[16] = {
-	0, 15, 14, 0, 0, 13, 5, 9, 6, 11, 8, 10, 16, 12, 7, 0
-};
-static unsigned int cpu_6xx[16] = {
-	0, 0, 14, 0, 0, 13, 5, 9, 6, 11, 8, 10, 0, 12, 7, 0
-};
-
-int chrp_get_irq(struct pt_regs *);
-void chrp_post_irq(struct pt_regs* regs, int);
-
-static inline unsigned long _get_HID1(void)
-{
-	unsigned long val;
-
-	__asm__ __volatile__("mfspr %0,1009" : "=r" (val));
-	return val;
-}
-
-int
-gemini_get_cpuinfo(char *buffer)
-{
-	int len;
-	unsigned char reg, rev;
-	char *family;
-	unsigned int type;
-
-	reg = readb(GEMINI_FEAT);
-	family = gemini_board_families[((reg>>4) & 0xf)];
-	if (((reg>>4) & 0xf) > gemini_board_count)
-		printk(KERN_ERR "cpuinfo(): unable to determine board family\n");
-
-	reg = readb(GEMINI_BREV);
-	type = (reg>>4) & 0xf;
-	rev = reg & 0xf;
-
-	reg = readb(GEMINI_BECO);
-
-	len = sprintf( buffer, "machine\t\t: Gemini %s%d, rev %c, eco %d\n", 
-		       family, type, (rev + 'A'), (reg & 0xf));
-
-	len = sprintf(buffer, "board\t\t: Gemini %s", family);
-	if (type > 9)
-		len += sprintf(buffer+len, "%c", (type - 10) + 'A');
-	else
-		len += sprintf(buffer+len, "%d", type);
-
-	len += sprintf(buffer+len, ", rev %c, eco %d\n",
-		       (rev + 'A'), (reg & 0xf));
-
-	len += sprintf(buffer+len, "clock\t\t: %dMhz\n", 
-		       gemini_get_clock_speed());
-
-	return len;
-}
-
-static u_char gemini_openpic_initsenses[] = {
-	1,
-	1,
-	1,
-	1,
-	0,
-	0,
-	1, /* remainder are level-triggered */
-};
-
-#define GEMINI_MPIC_ADDR (0xfcfc0000)
-#define GEMINI_MPIC_PCI_CFG (0x80005800)
-
-void __init gemini_openpic_init(void)
-{
-
-	OpenPIC = (volatile struct OpenPIC *)
-		grackle_read(0x80005800 + 0x10);
-#if 0	
-	grackle_write(GEMINI_MPIC_PCI_CFG + PCI_BASE_ADDRESS_0, 
-		      GEMINI_MPIC_ADDR);
-	grackle_write(GEMINI_MPIC_PCI_CFG + PCI_COMMAND, PCI_COMMAND_MEMORY);
-
-	OpenPIC = (volatile struct OpenPIC *) GEMINI_MPIC_ADDR;
-#endif
-	OpenPIC_InitSenses = gemini_openpic_initsenses;
-	OpenPIC_NumInitSenses = sizeof( gemini_openpic_initsenses );
-
-	ioremap( GEMINI_MPIC_ADDR, sizeof( struct OpenPIC ));
-}
-
-
-extern unsigned long loops_per_sec;
-extern int root_mountflags;
-extern char cmd_line[];
-
-void
-gemini_heartbeat(void)
-{
-	static unsigned long led = GEMINI_LEDBASE+(4*8);
-	static char direction = 8;
-	*(char *)led = 0;
-	if ( (led + direction) > (GEMINI_LEDBASE+(7*8)) ||
-	     (led + direction) < (GEMINI_LEDBASE+(4*8)) )
-		direction *= -1;
-	led += direction;
-	*(char *)led = 0xff;
-	ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
-}
-
-void __init gemini_setup_arch(void)
-{
-	extern char cmd_line[];
-
-
-	loops_per_sec = 50000000;
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	/* bootable off CDROM */
-	if (initrd_start)
-		ROOT_DEV = MKDEV(SCSI_CDROM_MAJOR, 0);
-	else
-#endif
-		ROOT_DEV = to_kdev_t(0x0801);
-
-	/* nothing but serial consoles... */  
-	sprintf(cmd_line, "%s console=ttyS0", cmd_line);
-
-	printk("Boot arguments: %s\n", cmd_line);
-
-	ppc_md.heartbeat = gemini_heartbeat;
-	ppc_md.heartbeat_reset = HZ/8;
-	ppc_md.heartbeat_count = 1;
-	
-	/* take special pains to map the MPIC, since it isn't mapped yet */
-	gemini_openpic_init();
-	/* start the L2 */
-	gemini_init_l2();
-}
-
-
-int
-gemini_get_clock_speed(void)
-{
-	unsigned long hid1, pvr = _get_PVR();
-	int clock;
-
-	hid1 = (_get_HID1() >> 28) & 0xf;
-	if (PVR_VER(pvr) == 8 ||
-	    PVR_VER(pvr) == 12)
-		hid1 = cpu_7xx[hid1];
-	else
-		hid1 = cpu_6xx[hid1];
-
-	switch((readb(GEMINI_BSTAT) & 0xc) >> 2) {
-
-	case 0:
-	default:
-		clock = (hid1*100)/3;
-		break;
-  
-	case 1:
-		clock = (hid1*125)/3;
-		break;
-  
-	case 2:
-		clock = (hid1*50);
-		break;
-	}
-
-	return clock;
-}
-
-#define L2CR_PIPE_LATEWR   (0x01800000)   /* late-write SRAM */
-#define L2CR_L2CTL         (0x00100000)   /* RAM control */
-#define L2CR_INST_DISABLE  (0x00400000)   /* disable for insn's */
-#define L2CR_L2I           (0x00200000)   /* global invalidate */
-#define L2CR_L2E           (0x80000000)   /* enable */
-#define L2CR_L2WT          (0x00080000)   /* write-through */
-
-void __init gemini_init_l2(void)
-{
-        unsigned char reg, brev, fam, creg;
-        unsigned long cache;
-        unsigned long pvr = _get_PVR();
-
-        reg = readb(GEMINI_L2CFG);
-        brev = readb(GEMINI_BREV);
-        fam = readb(GEMINI_FEAT);
-
-        switch(PVR_VER(pvr)) {
-
-        case 8:
-                if (reg & 0xc0)
-                        cache = (((reg >> 6) & 0x3) << 28);
-                else
-                        cache = 0x3 << 28;
-
-#ifdef CONFIG_SMP
-                /* Pre-3.0 processor revs had snooping errata.  Leave
-                   their L2's disabled with SMP. -- Dan */
-                if (PVR_CFG(pvr) < 3) {
-                        printk("Pre-3.0 750; L2 left disabled!\n");
-                        return;
-                }
-#endif /* CONFIG_SMP */
-
-                /* Special case: VGM5-B's came before L2 ratios were set on
-                   the board.  Processor speed shouldn't be too high, so
-                   set L2 ratio to 1:1.5.  */
-                if ((brev == 0x51) && ((fam & 0xa0) >> 4) == 0)
-                        reg |= 1;
-
-                /* determine best cache ratio based upon what the board
-                   tells us (which sometimes _may_ not be true) and
-                   the processor speed. */
-                else {
-                        if (gemini_get_clock_speed() > 250)
-                                reg = 2;
-                }
-                break;
-        case 12:
-	{
-		static unsigned long l2_size_val = 0;
-		
-		if (!l2_size_val)
-			l2_size_val = _get_L2CR();
-		cache = l2_size_val;
-                break;
-	}
-        case 4:
-        case 9:
-                creg = readb(GEMINI_CPUSTAT);
-                if (((creg & 0xc) >> 2) != 1)
-                        printk("Dual-604 boards don't support the use of L2\n");
-                else
-                        writeb(1, GEMINI_L2CFG);
-                return;
-        default:
-                printk("Unknown processor; L2 left disabled\n");
-                return;
-        }
-
-        cache |= ((1<<reg) << 25);
-        cache |= (L2CR_PIPE_LATEWR|L2CR_L2CTL|L2CR_INST_DISABLE);
-        _set_L2CR(0);
-        _set_L2CR(cache | L2CR_L2I | L2CR_L2E);
-
-}
-
-void
-gemini_restart(char *cmd)
-{
-	__cli();
-	/* make a clean restart, not via the MPIC */
-	_gemini_reboot();
-	for(;;);
-}
-
-void
-gemini_power_off(void)
-{
-	for(;;);
-}
-
-void
-gemini_halt(void)
-{
-	gemini_restart(NULL);
-}
-
-void __init gemini_init_IRQ(void)
-{
-	int i;
-
-	/* gemini has no 8259 */
-	open_pic_irq_offset = 0;
-	for( i=0; i < NR_IRQS; i++ ) 
-		irq_desc[i].handler = &open_pic;
-	openpic_init(1);
-#ifdef CONFIG_SMP
- 	request_irq(OPENPIC_VEC_IPI, openpic_ipi_action,
- 		    0, "IPI0", 0);
- 	request_irq(OPENPIC_VEC_IPI+1, openpic_ipi_action,
- 		    0, "IPI1 (invalidate TLB)", 0);
- 	request_irq(OPENPIC_VEC_IPI+2, openpic_ipi_action,
- 		    0, "IPI2 (stop CPU)", 0);
- 	request_irq(OPENPIC_VEC_IPI+3, openpic_ipi_action,
- 		    0, "IPI3 (reschedule)", 0);
-#endif	/* CONFIG_SMP */
-}
-
-#define gemini_rtc_read(x)       (readb(GEMINI_RTC+(x)))
-#define gemini_rtc_write(val,x)  (writeb((val),(GEMINI_RTC+(x))))
-
-/* ensure that the RTC is up and running */
-long __init gemini_time_init(void)
-{
-	unsigned char reg;
-
-	reg = gemini_rtc_read(M48T35_RTC_CONTROL);
-
-	if ( reg & M48T35_RTC_STOPPED ) {
-		printk(KERN_INFO "M48T35 real-time-clock was stopped. Now starting...\n");
-		gemini_rtc_write((reg & ~(M48T35_RTC_STOPPED)), M48T35_RTC_CONTROL);
-		gemini_rtc_write((reg | M48T35_RTC_SET), M48T35_RTC_CONTROL);
-	}
-	return 0;
-}
-
-#undef DEBUG_RTC
-
-unsigned long
-gemini_get_rtc_time(void)
-{
-	unsigned int year, mon, day, hour, min, sec;
-	unsigned char reg;
-
-	reg = gemini_rtc_read(M48T35_RTC_CONTROL);
-	gemini_rtc_write((reg|M48T35_RTC_READ), M48T35_RTC_CONTROL);
-#ifdef DEBUG_RTC
-	printk("get rtc: reg = %x\n", reg);
-#endif
-  
-	do {
-		sec = gemini_rtc_read(M48T35_RTC_SECONDS);
-		min = gemini_rtc_read(M48T35_RTC_MINUTES);
-		hour = gemini_rtc_read(M48T35_RTC_HOURS);
-		day = gemini_rtc_read(M48T35_RTC_DOM);
-		mon = gemini_rtc_read(M48T35_RTC_MONTH);
-		year = gemini_rtc_read(M48T35_RTC_YEAR);
-	} while( sec != gemini_rtc_read(M48T35_RTC_SECONDS));
-#ifdef DEBUG_RTC
-	printk("get rtc: sec=%x, min=%x, hour=%x, day=%x, mon=%x, year=%x\n", 
-	       sec, min, hour, day, mon, year);
-#endif
-
-	gemini_rtc_write(reg, M48T35_RTC_CONTROL);
-
-	BCD_TO_BIN(sec);
-	BCD_TO_BIN(min);
-	BCD_TO_BIN(hour);
-	BCD_TO_BIN(day);
-	BCD_TO_BIN(mon);
-	BCD_TO_BIN(year);
-
-	if ((year += 1900) < 1970)
-		year += 100;
-#ifdef DEBUG_RTC
-	printk("get rtc: sec=%x, min=%x, hour=%x, day=%x, mon=%x, year=%x\n", 
-	       sec, min, hour, day, mon, year);
-#endif
-
-	return mktime( year, mon, day, hour, min, sec );
-}
-
-
-int
-gemini_set_rtc_time( unsigned long now )
-{
-	unsigned char reg;
-	struct rtc_time tm;
-
-	to_tm( now, &tm );
-
-	reg = gemini_rtc_read(M48T35_RTC_CONTROL);
-#if DEBUG_RTC
-	printk("set rtc: reg = %x\n", reg);
-#endif
-  
-	gemini_rtc_write((reg|M48T35_RTC_SET), M48T35_RTC_CONTROL);
-#if DEBUG_RTC
-	printk("set rtc: tm vals - sec=%x, min=%x, hour=%x, mon=%x, mday=%x, year=%x\n",
-	       tm.tm_sec, tm.tm_min, tm.tm_hour, tm.tm_mon, tm.tm_mday, tm.tm_year);
-#endif
-  
-	tm.tm_year -= 1900;
-	BIN_TO_BCD(tm.tm_sec);
-	BIN_TO_BCD(tm.tm_min);
-	BIN_TO_BCD(tm.tm_hour);
-	BIN_TO_BCD(tm.tm_mon);
-	BIN_TO_BCD(tm.tm_mday);
-	BIN_TO_BCD(tm.tm_year);
-#ifdef DEBUG_RTC
-	printk("set rtc: tm vals - sec=%x, min=%x, hour=%x, mon=%x, mday=%x, year=%x\n",
-	       tm.tm_sec, tm.tm_min, tm.tm_hour, tm.tm_mon, tm.tm_mday, tm.tm_year);
-#endif
-
-	gemini_rtc_write(tm.tm_sec, M48T35_RTC_SECONDS);
-	gemini_rtc_write(tm.tm_min, M48T35_RTC_MINUTES);
-	gemini_rtc_write(tm.tm_hour, M48T35_RTC_HOURS);
-	gemini_rtc_write(tm.tm_mday, M48T35_RTC_DOM);
-	gemini_rtc_write(tm.tm_mon, M48T35_RTC_MONTH);
-	gemini_rtc_write(tm.tm_year, M48T35_RTC_YEAR);
-
-	/* done writing */
-	gemini_rtc_write(reg, M48T35_RTC_CONTROL);
-
-	if ((time_state == TIME_ERROR) || (time_state == TIME_BAD))
-		time_state = TIME_OK;
-  
-	return 0;
-}
-
-/*  use the RTC to determine the decrementer count */
-void __init gemini_calibrate_decr(void)
-{
-	int freq, divisor;
-	unsigned char reg;
-
-	/* determine processor bus speed */
-	reg = readb(GEMINI_BSTAT);
-
-	switch(((reg & 0x0c)>>2)&0x3) {
-	case 0:
-	default:
-		freq = 66;
-		break;
-	case 1:
-		freq = 83;
-		break;
-	case 2:
-		freq = 100;
-		break;
-	}
-
-	freq *= 1000000;
-	divisor = 4;
-	decrementer_count = freq / HZ / divisor;
-	count_period_num = divisor;
-	count_period_den = freq / 1000000;
-}
-
-int gemini_get_irq( struct pt_regs *regs )
-{
-        int irq;
-
-        irq = openpic_irq( smp_processor_id() );
-        if (irq == OPENPIC_VEC_SPURIOUS)
-                /*
-                 * Spurious interrupts should never be
-                 * acknowledged
-                 */
-		irq = -1;
-	/*
-	 * I would like to openpic_eoi here but there seem to be timing problems
-	 * between the openpic ack and the openpic eoi.
-	 *   -- Cort
-	 */
-	return irq;
-}
-
-void gemini_post_irq(struct pt_regs* regs, int irq)
-{
-	/*
-	 * If it's an i8259 irq then we've already done the
-	 * openpic irq.  So we just check to make sure the controller
-	 * is an openpic and if it is then eoi
-	 *
-	 * We do it this way since our irq_desc[irq].handler can change
-	 * with RTL and no longer be open_pic -- Cort
-	 */
-	if ( irq >= open_pic_irq_offset)
-		openpic_eoi( smp_processor_id() );
-}
-
-
-void __init gemini_init(unsigned long r3, unsigned long r4, unsigned long r5,
-			unsigned long r6, unsigned long r7)
-{
-	int i;
-	int chrp_get_irq( struct pt_regs * );
-
-	for(i = 0; i < GEMINI_LEDS; i++)
-		gemini_led_off(i);
- 
-	gemini_setup_pci_ptrs();
-
-	ISA_DMA_THRESHOLD = 0;
-	DMA_MODE_READ = 0;
-	DMA_MODE_WRITE = 0;
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	if ( r4 )
-	{
-		initrd_start = r4 + KERNELBASE;
-		initrd_end = r5 + KERNELBASE;
-	}
-#endif
-
-	ppc_md.setup_arch = gemini_setup_arch;
-	ppc_md.setup_residual = NULL;
-	ppc_md.get_cpuinfo = gemini_get_cpuinfo;
-	ppc_md.irq_cannonicalize = NULL;
-	ppc_md.init_IRQ = gemini_init_IRQ;
-	ppc_md.get_irq = gemini_get_irq;
-	ppc_md.post_irq = gemini_post_irq;
-	ppc_md.init = NULL;
-
-	ppc_md.restart = gemini_restart;
-	ppc_md.power_off = gemini_power_off;
-	ppc_md.halt = gemini_halt;
-
-	ppc_md.time_init = gemini_time_init;
-	ppc_md.set_rtc_time = gemini_set_rtc_time;
-	ppc_md.get_rtc_time = gemini_get_rtc_time;
-	ppc_md.calibrate_decr = gemini_calibrate_decr;
-
-	/* no keyboard/mouse/video stuff yet.. */
-	ppc_md.kbd_setkeycode = NULL;
-	ppc_md.kbd_getkeycode = NULL;
-	ppc_md.kbd_translate = NULL;
-	ppc_md.kbd_unexpected_up = NULL;
-	ppc_md.kbd_leds = NULL;
-	ppc_md.kbd_init_hw = NULL;
-#ifdef CONFIG_MAGIC_SYSRQ
-	ppc_md.ppc_kbd_sysrq_xlate = NULL;
-#endif
-	ppc_md.pcibios_fixup_bus = gemini_pcibios_fixup;
-}