Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

4 files changed, 354 insertions, 0 deletions

diff --git a/arch/mips/mips-boards/atlas/Makefile b/arch/mips/mips-boards/atlas/Makefile
new file mode 100644
index 00000000000..d8dab75906b
--- /dev/null
+++ b/arch/mips/mips-boards/atlas/Makefile
@@ -0,0 +1,20 @@
+#
+# Carsten Langgaard, carstenl@mips.com
+# Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+#
+# 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.
+#
+
+obj-y			:= atlas_int.o atlas_setup.o
+obj-$(CONFIG_KGDB)	+= atlas_gdb.o
diff --git a/arch/mips/mips-boards/atlas/atlas_gdb.c b/arch/mips/mips-boards/atlas/atlas_gdb.c
new file mode 100644
index 00000000000..fb65280f178
--- /dev/null
+++ b/arch/mips/mips-boards/atlas/atlas_gdb.c
@@ -0,0 +1,97 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  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.
+ *
+ * This is the interface to the remote debugger stub.
+ */
+#include <asm/io.h>
+#include <asm/mips-boards/atlas.h>
+#include <asm/mips-boards/saa9730_uart.h>
+
+#define INB(a)     inb((unsigned long)a)
+#define OUTB(x,a)  outb(x,(unsigned long)a)
+
+/*
+ * This is the interface to the remote debugger stub
+ * if the Philips part is used for the debug port,
+ * called from the platform setup code.
+ */
+void *saa9730_base = (void *)ATLAS_SAA9730_REG;
+
+static int saa9730_kgdb_active = 0;
+
+#define SAA9730_BAUDCLOCK(baud) (((ATLAS_SAA9730_BAUDCLOCK/(baud))/16)-1)
+
+int saa9730_kgdb_hook(int speed)
+{
+	int baudclock;
+	t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
+
+        /*
+         * Clear all interrupts
+         */
+	(void) INB(&kgdb_uart->Lsr);
+	(void) INB(&kgdb_uart->Msr);
+	(void) INB(&kgdb_uart->Thr_Rbr);
+	(void) INB(&kgdb_uart->Iir_Fcr);
+
+        /*
+         * Now, initialize the UART
+         */
+	/* 8 data bits, one stop bit, no parity */
+	OUTB(SAA9730_LCR_DATA8, &kgdb_uart->Lcr);
+
+	baudclock = SAA9730_BAUDCLOCK(speed);
+
+	OUTB((baudclock >> 16) & 0xff, &kgdb_uart->BaudDivMsb);
+	OUTB( baudclock        & 0xff, &kgdb_uart->BaudDivLsb);
+
+	/* Set RTS/DTR active */
+	OUTB(SAA9730_MCR_DTR | SAA9730_MCR_RTS, &kgdb_uart->Mcr);
+	saa9730_kgdb_active = 1;
+
+	return speed;
+}
+
+int saa9730_putDebugChar(char c)
+{
+	t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
+
+        if (!saa9730_kgdb_active) {     /* need to init device first */
+                return 0;
+        }
+
+        while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_THRE))
+                ;
+	OUTB(c, &kgdb_uart->Thr_Rbr);
+
+        return 1;
+}
+
+char saa9730_getDebugChar(void)
+{
+	t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
+	char c;
+
+        if (!saa9730_kgdb_active) {     /* need to init device first */
+                return 0;
+        }
+        while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_DR))
+                ;
+
+	c = INB(&kgdb_uart->Thr_Rbr);
+	return(c);
+}
diff --git a/arch/mips/mips-boards/atlas/atlas_int.c b/arch/mips/mips-boards/atlas/atlas_int.c
new file mode 100644
index 00000000000..8f1d875217a
--- /dev/null
+++ b/arch/mips/mips-boards/atlas/atlas_int.c
@@ -0,0 +1,142 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ * ########################################################################
+ *
+ *  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.
+ *
+ * ########################################################################
+ *
+ * Routines for generic manipulation of the interrupts found on the MIPS
+ * Atlas board.
+ *
+ */
+#include <linux/compiler.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/mips-boards/atlas.h>
+#include <asm/mips-boards/atlasint.h>
+#include <asm/gdb-stub.h>
+
+
+static struct atlas_ictrl_regs *atlas_hw0_icregs;
+
+extern asmlinkage void mipsIRQ(void);
+
+#if 0
+#define DEBUG_INT(x...) printk(x)
+#else
+#define DEBUG_INT(x...)
+#endif
+
+void disable_atlas_irq(unsigned int irq_nr)
+{
+	atlas_hw0_icregs->intrsten = (1 << (irq_nr-ATLASINT_BASE));
+	iob();
+}
+
+void enable_atlas_irq(unsigned int irq_nr)
+{
+	atlas_hw0_icregs->intseten = (1 << (irq_nr-ATLASINT_BASE));
+	iob();
+}
+
+static unsigned int startup_atlas_irq(unsigned int irq)
+{
+	enable_atlas_irq(irq);
+	return 0; /* never anything pending */
+}
+
+#define shutdown_atlas_irq	disable_atlas_irq
+
+#define mask_and_ack_atlas_irq disable_atlas_irq
+
+static void end_atlas_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+		enable_atlas_irq(irq);
+}
+
+static struct hw_interrupt_type atlas_irq_type = {
+	"Atlas",
+	startup_atlas_irq,
+	shutdown_atlas_irq,
+	enable_atlas_irq,
+	disable_atlas_irq,
+	mask_and_ack_atlas_irq,
+	end_atlas_irq,
+	NULL
+};
+
+static inline int ls1bit32(unsigned int x)
+{
+	int b = 31, s;
+
+	s = 16; if (x << 16 == 0) s = 0; b -= s; x <<= s;
+	s =  8; if (x <<  8 == 0) s = 0; b -= s; x <<= s;
+	s =  4; if (x <<  4 == 0) s = 0; b -= s; x <<= s;
+	s =  2; if (x <<  2 == 0) s = 0; b -= s; x <<= s;
+	s =  1; if (x <<  1 == 0) s = 0; b -= s;
+
+	return b;
+}
+
+void atlas_hw0_irqdispatch(struct pt_regs *regs)
+{
+	unsigned long int_status;
+	int irq;
+
+	int_status = atlas_hw0_icregs->intstatus;
+
+	/* if int_status == 0, then the interrupt has already been cleared */
+	if (unlikely(int_status == 0))
+		return;
+
+	irq = ATLASINT_BASE + ls1bit32(int_status);
+
+	DEBUG_INT("atlas_hw0_irqdispatch: irq=%d\n", irq);
+
+	do_IRQ(irq, regs);
+}
+
+void __init arch_init_irq(void)
+{
+	int i;
+
+	atlas_hw0_icregs = (struct atlas_ictrl_regs *)ioremap (ATLAS_ICTRL_REGS_BASE, sizeof(struct atlas_ictrl_regs *));
+	
+	/*
+	 * Mask out all interrupt by writing "1" to all bit position in
+	 * the interrupt reset reg.
+	 */
+	atlas_hw0_icregs->intrsten = 0xffffffff;
+
+	/* Now safe to set the exception vector. */
+	set_except_vector(0, mipsIRQ);
+
+	for (i = ATLASINT_BASE; i <= ATLASINT_END; i++) {
+		irq_desc[i].status	= IRQ_DISABLED;
+		irq_desc[i].action	= 0;
+		irq_desc[i].depth	= 1;
+		irq_desc[i].handler	= &atlas_irq_type;
+		spin_lock_init(&irq_desc[i].lock);
+	}
+}
diff --git a/arch/mips/mips-boards/atlas/atlas_setup.c b/arch/mips/mips-boards/atlas/atlas_setup.c
new file mode 100644
index 00000000000..0a1dd9bbc02
--- /dev/null
+++ b/arch/mips/mips-boards/atlas/atlas_setup.c
@@ -0,0 +1,95 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  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/config.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+
+#include <asm/cpu.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/mips-boards/prom.h>
+#include <asm/mips-boards/atlas.h>
+#include <asm/mips-boards/atlasint.h>
+#include <asm/time.h>
+#include <asm/traps.h>
+
+extern void mips_reboot_setup(void);
+extern void mips_time_init(void);
+extern void mips_timer_setup(struct irqaction *irq);
+extern unsigned long mips_rtc_get_time(void);
+
+#ifdef CONFIG_KGDB
+extern void kgdb_config(void);
+#endif
+
+static void __init serial_init(void);
+
+const char *get_system_type(void)
+{
+	return "MIPS Atlas";
+}
+
+static int __init atlas_setup(void)
+{
+	ioport_resource.end = 0x7fffffff;
+
+	serial_init ();
+
+#ifdef CONFIG_KGDB
+	kgdb_config();
+#endif
+	mips_reboot_setup();
+
+	board_time_init = mips_time_init;
+	board_timer_setup = mips_timer_setup;
+	rtc_get_time = mips_rtc_get_time;
+
+	return 0;
+}
+
+early_initcall(atlas_setup);
+
+static void __init serial_init(void)
+{
+#ifdef CONFIG_SERIAL_8250
+	struct uart_port s;
+
+	memset(&s, 0, sizeof(s));
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+	s.iobase = ATLAS_UART_REGS_BASE;
+#else
+	s.iobase = ATLAS_UART_REGS_BASE+3;
+#endif
+	s.irq = ATLASINT_UART;
+	s.uartclk = ATLAS_BASE_BAUD * 16;
+	s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
+	s.iotype = SERIAL_IO_PORT;
+	s.regshift = 3;
+
+	if (early_serial_setup(&s) != 0) {
+		printk(KERN_ERR "Serial setup failed!\n");
+	}
+#endif
+}