patch-2.4.20 linux-2.4.20/arch/mips/momentum/ocelot_g/setup.c

• Lines: 259
• Date: Thu Nov 28 15:53:10 2002
• Orig file: linux-2.4.19/arch/mips/momentum/ocelot_g/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/mips/momentum/ocelot_g/setup.c linux-2.4.20/arch/mips/momentum/ocelot_g/setup.c
@@ -0,0 +1,258 @@
+/*
+ * setup.c
+ *
+ * BRIEF MODULE DESCRIPTION
+ * Momentum Computer Ocelot-G (CP7000G) - 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
+ *   mdharm@momenco.com
+ *
+ * Author: RidgeRun, Inc.
+ *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ *  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 "gt64240.h"
+#include "ocelot_pld.h"
+
+extern struct rtc_ops no_rtc_ops;
+
+unsigned long gt64240_base;
+
+/* These functions are used for rebooting or halting the machine*/
+extern void momenco_ocelot_restart(char *command);
+extern void momenco_ocelot_halt(void);
+extern void momenco_ocelot_power_off(void);
+
+extern void gt64240_time_init(void);
+extern void momenco_ocelot_irq_setup(void);
+
+static char reset_reason;
+
+#define ENTRYLO(x) ((pte_val(mk_pte_phys((x), PAGE_KERNEL_UNCACHED)) >> 6)|1)
+
+static void __init setup_l3cache(unsigned long size);
+
+void __init bus_error_init(void) { /* nothing */ }
+
+/* setup code for a handoff from a version 2 PMON 2000 PROM */
+void PMON_v2_setup(void)
+{
+	/* A wired TLB entry for the GT64240 and the serial port. The
+	   GT64240 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
+		GT64240 Internal Regs	0xf4000000	0xe0000000
+		UARTs (CS2)		0xfd000000	0xe0001000
+	*/
+	add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K);
+	add_wired_entry(ENTRYLO(0xfd000000), ENTRYLO(0xfd001000), 0xfd000000, PM_4K);
+
+	/* Also a temporary entry to let us talk to the Ocelot PLD and NVRAM
+	   in the CS[012] region. We can't use ioremap() yet. The NVRAM
+	   is a ST M48T37Y, which includes NVRAM, RTC, and Watchdog functions.
+
+		Ocelot PLD (CS0)	0xfc000000	0xe0020000
+		NVRAM (CS1)		0xfc800000	0xe0030000
+	*/
+	add_temporary_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfc010000), 0xfc000000, PM_64K);
+	add_temporary_entry(ENTRYLO(0xfc800000), ENTRYLO(0xfc810000), 0xfc800000, PM_64K);
+
+	gt64240_base = 0xf4000000;
+}
+
+void __init momenco_ocelot_g_setup(void)
+{
+	void (*l3func)(unsigned long)=KSEG1ADDR(&setup_l3cache);
+	unsigned int tmpword;
+
+	board_time_init = gt64240_time_init;
+
+	_machine_restart = momenco_ocelot_restart;
+	_machine_halt = momenco_ocelot_halt;
+	_machine_power_off = momenco_ocelot_power_off;
+
+	/*
+	 * initrd_start = (ulong)ocelot_initrd_start;
+	 * initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size;
+	 * initrd_below_start_ok = 1;
+	 */
+	rtc_ops = &no_rtc_ops;
+
+	/* do handoff reconfiguration */
+	PMON_v2_setup();
+
+	/* Turn off the Bit-Error LED */
+	OCELOT_PLD_WRITE(0x80, INTCLR);
+
+	tmpword = OCELOT_PLD_READ(BOARDREV);
+	if (tmpword < 26)
+		printk("Momenco Ocelot-G: Board Assembly Rev. %c\n", 'A'+tmpword);
+	else
+		printk("Momenco Ocelot-G: Board Assembly Revision #0x%x\n", tmpword);
+
+	tmpword = OCELOT_PLD_READ(PLD1_ID);
+	printk("PLD 1 ID: %d.%d\n", tmpword>>4, tmpword&15);
+	tmpword = OCELOT_PLD_READ(PLD2_ID);
+	printk("PLD 2 ID: %d.%d\n", tmpword>>4, tmpword&15);
+	tmpword = OCELOT_PLD_READ(RESET_STATUS);
+	printk("Reset reason: 0x%x\n", tmpword);
+	reset_reason = tmpword;
+	OCELOT_PLD_WRITE(0xff, RESET_STATUS);
+
+	tmpword = OCELOT_PLD_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");
+	printk("  - Tulip PHY %s connected\n", (tmpword&0x10)?"is":"not");
+	printk("  - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
+	printk("  - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
+
+	if (tmpword&12)
+		l3func((1<<(((tmpword&12) >> 2)+20)));
+
+	switch(tmpword &3) {
+	case 3:
+		/* 512MiB -- two banks of 256MiB */
+		add_memory_region(  0x0<<20, 0x100<<20, BOOT_MEM_RAM);
+/*
+		add_memory_region(0x100<<20, 0x100<<20, BOOT_MEM_RAM);
+*/
+		break;
+	case 2:
+		/* 256MiB -- two banks of 128MiB */
+		add_memory_region( 0x0<<20, 0x80<<20, BOOT_MEM_RAM);
+		add_memory_region(0x80<<20, 0x80<<20, BOOT_MEM_RAM);
+		break;
+	case 1:
+		/* 128MiB -- 64MiB per bank */
+		add_memory_region( 0x0<<20, 0x40<<20, BOOT_MEM_RAM);
+		add_memory_region(0x40<<20, 0x40<<20, BOOT_MEM_RAM);
+		break;
+	case 0:
+		/* 64MiB */
+		add_memory_region( 0x0<<20, 0x40<<20, BOOT_MEM_RAM);
+		break;
+	}
+
+	/* FIXME: Fix up the DiskOnChip mapping */
+	GT_WRITE(0x468, 0xfef73);
+}
+
+extern int rm7k_tcache_enabled;
+/*
+ * This runs in KSEG1. See the verbiage in rm7k.c::probe_scache()
+ */
+#define Page_Invalidate_T 0x16
+static void __init setup_l3cache(unsigned long size)
+{
+	int register i;
+	unsigned long tmp;
+
+	printk("Enabling L3 cache...");
+
+	/* Enable the L3 cache in the GT64120A's CPU Configuration register */
+	GT_READ(0, &tmp);
+	GT_WRITE(0, tmp | (1<<14));
+
+	/* Enable the L3 cache in the CPU */
+	set_cp0_config(1<<12 /* CONF_TE */);
+
+	/* Clear the cache */
+	set_taglo(0);
+	set_taghi(0);
+
+	for (i=0; i < size; i+= 4096) {
+		__asm__ __volatile__ (
+			".set noreorder\n\t"
+			".set mips3\n\t"
+			"cache %1, (%0)\n\t"
+			".set mips0\n\t"
+			".set reorder"
+			:
+			: "r" (KSEG0ADDR(i)),
+			  "i" (Page_Invalidate_T));
+	}
+
+	/* Let the RM7000 MM code know that the tertiary cache is enabled */
+	rm7k_tcache_enabled = 1;
+
+	printk("Done\n");
+}
+
+
+/* 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);
+
+	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);