SPARC: Added support for SPARC LEON2 SOC Processor.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>

Makefile

@@ -2902,6 +2902,10 @@ r2dplus_config  :   unconfig
 ## LEON3
 #########################################################################
 
+#########################################################################
+## LEON2
+#########################################################################
+
 #########################################################################
 #########################################################################
 #########################################################################

README

@@ -153,6 +153,7 @@ Directory Hierarchy:
   - at32ap	Files specific to Atmel AVR32 AP CPUs
   - i386	Files specific to i386 CPUs
   - ixp		Files specific to Intel XScale IXP CPUs
+  - leon2	Files specific to Gaisler LEON2 SPARC CPU
   - leon3	Files specific to Gaisler LEON3 SPARC CPU
   - mcf52x2	Files specific to Freescale ColdFire MCF52x2 CPUs
   - mcf5227x	Files specific to Freescale ColdFire MCF5227x CPUs

cpu/leon2/Makefile

+#
+# (C) Copyright 2003-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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 program is distributed in the hope that 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 $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(CPU).a
+
+START	= start.o
+SOBJS	=
+COBJS	= cpu_init.o serial.o cpu.o interrupts.o prom.o
+
+SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+START	:= $(addprefix $(obj),$(START))
+
+all:	$(obj).depend $(START) $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+$(START): $(START:.o=.S)
+	$(CC) -D__ASSEMBLY__ $(DBGFLAGS) $(OPTFLAGS) -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \
+	-I$(TOPDIR)/include -fno-builtin -ffreestanding -nostdinc -isystem $(gccincdir) -pipe \
+	$(PLATFORM_CPPFLAGS) -Wall -Wstrict-prototypes \
+	-I$(TOPDIR)/board -c -o $(START) $(START:.o=.S)
+
+sinclude $(obj).depend
+
+#########################################################################

cpu/leon2/config.mk

+#
+# (C) Copyright 2003
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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 program is distributed in the hope that 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
+#
+
+PLATFORM_RELFLAGS += -fPIC
+
+PLATFORM_CPPFLAGS += -DCONFIG_LEON

cpu/leon2/cpu.c

+/* CPU specific code for the LEON2 CPU
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that 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 <common.h>
+#include <watchdog.h>
+#include <command.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern void _reset_reloc(void);
+
+int checkcpu(void)
+{
+	/* check LEON version here */
+	printf("CPU: LEON2\n");
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+void cpu_reset(void)
+{
+	/* Interrupts off */
+	disable_interrupts();
+
+	/* jump to restart in flash */
+	_reset_reloc();
+}
+
+int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	cpu_reset();
+
+	return 1;
+}
+
+/* ------------------------------------------------------------------------- */

cpu/leon2/cpu_init.c

+/* Initializes CPU and basic hardware such as memory
+ * controllers, IRQ controller and system timer 0.
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that 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 <common.h>
+#include <asm/asi.h>
+#include <asm/leon.h>
+
+#include <config.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* reset CPU (jump to 0, without reset) */
+void start(void);
+
+struct {
+	gd_t gd_area;
+	bd_t bd;
+} global_data;
+
+/*
+ * Breath some life into the CPU...
+ *
+ * Set up the memory map,
+ * initialize a bunch of registers.
+ *
+ * Run from FLASH/PROM:
+ *  - until memory controller is set up, only registers avaiable
+ *  - no global variables available for writing
+ *  - constants avaiable
+ */
+
+void cpu_init_f(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	/* initialize the IRQMP */
+	leon2->Interrupt_Force = 0;
+	leon2->Interrupt_Pending = 0;
+	leon2->Interrupt_Clear = 0xfffe;	/* clear all old pending interrupts */
+	leon2->Interrupt_Mask = 0xfffe0000;	/* mask all IRQs */
+
+	/* cache */
+
+       /* I/O port setup */
+#ifdef LEON2_IO_PORT_DIR
+       leon2->PIO_Direction = LEON2_IO_PORT_DIR;
+#endif
+#ifdef LEON2_IO_PORT_DATA
+       leon2->PIO_Data = LEON2_IO_PORT_DATA;
+#endif
+#ifdef LEON2_IO_PORT_INT
+       leon2->PIO_Interrupt = LEON2_IO_PORT_INT;
+#else
+       leon2->PIO_Interrupt = 0;
+#endif
+}
+
+void cpu_init_f2(void)
+{
+
+}
+
+/*
+ * initialize higher level parts of CPU like time base and timers
+ */
+int cpu_init_r(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	/* initialize prescaler common to all timers to 1MHz */
+	leon2->Scaler_Counter = leon2->Scaler_Reload =
+	    (((CONFIG_SYS_CLK_FREQ / 1000) + 500) / 1000) - 1;
+
+	return (0);
+}
+
+/* Uses Timer 0 to get accurate
+ * pauses. Max 2 raised to 32 ticks
+ *
+ */
+void cpu_wait_ticks(unsigned long ticks)
+{
+	unsigned long start = get_timer(0);
+	while (get_timer(start) < ticks) ;
+}
+
+/* initiate and setup timer0 interrupt to 1MHz
+ * Return irq number for timer int or a negative number for
+ * dealing with self
+ */
+int timer_interrupt_init_cpu(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	/* 1ms ticks */
+	leon2->Timer_Counter_1 = 0;
+	leon2->Timer_Reload_1 = 999;	/* (((1000000 / 100) - 1)) */
+	leon2->Timer_Control_1 =
+	    (LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD);
+
+	return LEON2_TIMER1_IRQNO;
+}
+
+/*
+ * This function is intended for SHORT delays only.
+ */
+unsigned long cpu_usec2ticks(unsigned long usec)
+{
+	/* timer set to 1kHz ==> 1 clk tick = 1 msec */
+	if (usec < 1000)
+		return 1;
+	return (usec / 1000);
+}
+
+unsigned long cpu_ticks2usec(unsigned long ticks)
+{
+	/* 1tick = 1usec */
+	return ticks * 1000;
+}

cpu/leon2/interrupts.c

+/*
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * (C) Copyright 2006
+ * Detlev Zundel, DENX Software Engineering, dzu@denx.de
+ *
+ * (C) Copyright -2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that 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 <asm/stack.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <command.h>
+#include <asm/irq.h>
+
+#include <asm/leon.h>
+
+/* 15 normal irqs and a non maskable interrupt */
+#define NR_IRQS 15
+
+struct irq_action {
+	interrupt_handler_t *handler;
+	void *arg;
+	unsigned int count;
+};
+
+static struct irq_action irq_handlers[NR_IRQS] = { {0}, };
+static int spurious_irq_cnt = 0;
+static int spurious_irq = 0;
+
+static inline unsigned int leon2_get_irqmask(unsigned int irq)
+{
+	if ((irq < 0) || (irq >= NR_IRQS)) {
+		return 0;
+	} else {
+		return (1 << irq);
+	}
+}
+
+static void leon2_ic_disable(unsigned int irq)
+{
+	unsigned int mask, pil;
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	pil = intLock();
+
+	/* get mask of interrupt */
+	mask = leon2_get_irqmask(irq);
+
+	/* set int level */
+	leon2->Interrupt_Mask =
+	    SPARC_NOCACHE_READ(&leon2->Interrupt_Mask) & (~mask);
+
+	intUnlock(pil);
+}
+
+static void leon2_ic_enable(unsigned int irq)
+{
+	unsigned int mask, pil;
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	pil = intLock();
+
+	/* get mask of interrupt */
+	mask = leon2_get_irqmask(irq);
+
+	/* set int level */
+	leon2->Interrupt_Mask =
+	    SPARC_NOCACHE_READ(&leon2->Interrupt_Mask) | mask;
+
+	intUnlock(pil);
+}
+
+void handler_irq(int irq, struct pt_regs *regs)
+{
+	if (irq_handlers[irq].handler) {
+		if (((unsigned int)irq_handlers[irq].handler > CFG_RAM_END) ||
+		    ((unsigned int)irq_handlers[irq].handler < CFG_RAM_BASE)
+		    ) {
+			printf("handler_irq: bad handler: %x, irq number %d\n",
+			       (unsigned int)irq_handlers[irq].handler, irq);
+			return;
+		}
+		irq_handlers[irq].handler(irq_handlers[irq].arg);
+		irq_handlers[irq].count++;
+	} else {
+		spurious_irq_cnt++;
+		spurious_irq = irq;
+	}
+}
+
+void leon2_force_int(int irq)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	if ((irq >= NR_IRQS) || (irq < 0))
+		return;
+	printf("Forcing interrupt %d\n", irq);
+
+	leon2->Interrupt_Force =
+	    SPARC_NOCACHE_READ(&leon2->Interrupt_Force) | (1 << irq);
+}
+
+/****************************************************************************/
+
+int interrupt_init_cpu(void)
+{
+	return (0);
+}
+
+/****************************************************************************/
+
+/* Handle Timer 0 IRQ */
+void timer_interrupt_cpu(void *arg)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+	leon2->Timer_Control_1 =
+	    (LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD);
+
+	/* nothing to do here */
+	return;
+}
+
+/****************************************************************************/
+
+/*
+ * Install and free a interrupt handler.
+ */
+
+void irq_install_handler(int irq, interrupt_handler_t * handler, void *arg)
+{
+	if (irq < 0 || irq >= NR_IRQS) {
+		printf("irq_install_handler: bad irq number %d\n", irq);
+		return;
+	}
+
+	if (irq_handlers[irq].handler != NULL)
+		printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
+		       (ulong) handler, (ulong) irq_handlers[irq].handler);
+
+	if (((unsigned int)handler > CFG_RAM_END) ||
+	    ((unsigned int)handler < CFG_RAM_BASE)
+	    ) {
+		printf("irq_install_handler: bad handler: %x, irq number %d\n",
+		       (unsigned int)handler, irq);
+		return;
+	}
+	irq_handlers[irq].handler = handler;
+	irq_handlers[irq].arg = arg;
+
+	/* enable irq on LEON2 hardware */
+	leon2_ic_enable(irq);
+
+}
+
+void irq_free_handler(int irq)
+{
+	if (irq < 0 || irq >= NR_IRQS) {
+		printf("irq_free_handler: bad irq number %d\n", irq);
+		return;
+	}
+
+	/* disable irq on LEON2 hardware */
+	leon2_ic_disable(irq);
+
+	irq_handlers[irq].handler = NULL;
+	irq_handlers[irq].arg = NULL;
+}
+
+/****************************************************************************/
+
+#if defined(CONFIG_CMD_IRQ)
+void do_irqinfo(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
+{
+	int irq;
+	unsigned int pil = get_pil();
+	printf("PIL level: %u\n\r", pil);
+	printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
+	       spurious_irq_cnt, spurious_irq);
+
+	puts("\nInterrupt-Information:\n" "Nr  Routine   Arg       Count\n");
+
+	for (irq = 0; irq < NR_IRQS; irq++) {
+		if (irq_handlers[irq].handler != NULL) {
+			printf("%02d  %08lx  %08lx  %ld\n", irq,
+			       (unsigned int)irq_handlers[irq].handler,
+			       (unsigned int)irq_handlers[irq].arg,
+			       irq_handlers[irq].count);
+		}
+	}
+}
+#endif

cpu/leon2/serial.c

+/* GRLIB APBUART Serial controller driver
+ *
+ * (C) Copyright 2008
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that 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 <common.h>
+#include <asm/processor.h>
+#include <asm/leon.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Force cache miss each time a serial controller reg is read */
+#define CACHE_BYPASS 1
+
+#ifdef CACHE_BYPASS
+#define READ_BYTE(var)  SPARC_NOCACHE_READ_BYTE((unsigned int)&(var))
+#define READ_HWORD(var) SPARC_NOCACHE_READ_HWORD((unsigned int)&(var))
+#define READ_WORD(var)  SPARC_NOCACHE_READ((unsigned int)&(var))
+#define READ_DWORD(var) SPARC_NOCACHE_READ_DWORD((unsigned int)&(var))
+#endif
+
+int serial_init(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+	unsigned int tmp;
+
+	/* Init LEON2 UART
+	 *
+	 * Set scaler / baud rate
+	 *
+	 * Receiver & transmitter enable
+	 */
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	regs->UART_Scaler = CFG_LEON2_UART1_SCALER;
+
+	/* Let bit 11 be unchanged (debug bit for GRMON) */
+	tmp = READ_WORD(regs->UART_Control);
+
+	regs->UART_Control = ((tmp & LEON2_UART_CTRL_DBG) |
+			      (LEON2_UART1_LOOPBACK_ENABLE << 7) |
+			      (LEON2_UART1_FLOWCTRL_ENABLE << 6) |
+			      (LEON2_UART1_PARITY_ENABLE << 5) |
+			      (LEON2_UART1_ODDPAR_ENABLE << 4) |
+			      LEON2_UART_CTRL_RE | LEON2_UART_CTRL_TE);
+
+	return 0;
+}
+
+void serial_putc(const char c)
+{
+	if (c == '\n')
+		serial_putc_raw('\r');
+
+	serial_putc_raw(c);
+}
+
+void serial_putc_raw(const char c)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	/* Wait for last character to go. */
+	while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_THE)) ;
+
+	/* Send data */
+	regs->UART_Channel = c;
+
+#ifdef LEON_DEBUG
+	/* Wait for data to be sent */
+	while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_TSE)) ;
+#endif
+}
+
+void serial_puts(const char *s)
+{
+	while (*s) {
+		serial_putc(*s++);
+	}
+}
+