[Microblaze][PATCH] part 2

timer support
interrupt controller support
flash support
ethernet support
cache support
board information support
env support
booting image support

adding support for Xilinx ML401

cpu/microblaze/Makefile

@@ -26,7 +26,8 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(CPU).a
 
 START	= start.o
-COBJS	= cpu.o interrupts.o
+SOBJS	= dcache.o icache.o irq.o disable_int.o enable_int.o
+COBJS	= cpu.o interrupts.o cache.o exception.o timer.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

cpu/microblaze/interrupts.c

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -13,7 +15,7 @@
  *
  * 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
+ * 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
@@ -22,11 +24,185 @@
  * MA 02111-1307 USA
  */
 
-void enable_interrupts(void)
+#include <common.h>
+#include <command.h>
+#include <asm/microblaze_intc.h>
+
+#undef DEBUG_INT
+
+extern void microblaze_disable_interrupts (void);
+extern void microblaze_enable_interrupts (void);
+
+void enable_interrupts (void)
 {
+	microblaze_enable_interrupts ();
 }
 
-int disable_interrupts(void)
+int disable_interrupts (void)
 {
+	microblaze_disable_interrupts ();
 	return 0;
 }
+
+#ifdef CFG_INTC_0
+#ifdef CFG_TIMER_0
+extern void timer_init (void);
+#endif
+
+static struct irq_action vecs[CFG_INTC_0_NUM];
+
+/* mapping structure to interrupt controller */
+microblaze_intc_t *intc = (microblaze_intc_t *) (CFG_INTC_0_ADDR);
+
+/* default handler */
+void def_hdlr (void)
+{
+	puts ("def_hdlr\n");
+}
+
+void enable_one_interrupt (int irq)
+{
+	int mask;
+	int offset = 1;
+	offset <<= irq;
+	mask = intc->ier;
+	intc->ier = (mask | offset);
+#ifdef DEBUG_INT
+	printf ("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
+		intc->ier);
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+#endif
+}
+
+void disable_one_interrupt (int irq)
+{
+	int mask;
+	int offset = 1;
+	offset <<= irq;
+	mask = intc->ier;
+	intc->ier = (mask & ~offset);
+#ifdef DEBUG_INT
+	printf ("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
+		intc->ier);
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+#endif
+}
+
+/* adding new handler for interrupt */
+void install_interrupt_handler (int irq, interrupt_handler_t * hdlr, void *arg)
+{
+	struct irq_action *act;
+	/* irq out of range */
+	if ((irq < 0) || (irq > CONFIG_XILINX_INTC_0_NUM_INTR_INPUTS)) {
+		puts ("IRQ out of range\n");
+		return;
+	}
+	act = &vecs[irq];
+	if (hdlr) {		/* enable */
+		act->handler = hdlr;
+		act->arg = arg;
+		act->count = 0;
+		enable_one_interrupt (irq);
+	} else {		/* disable */
+
+		act->handler = (interrupt_handler_t *) def_hdlr;
+		act->arg = (void *)irq;
+		disable_one_interrupt (irq);
+	}
+}
+
+/* initialization interrupt controller - hardware */
+void intc_init (void)
+{
+	intc->mer = 0;
+	intc->ier = 0;
+	intc->iar = 0xFFFFFFFF;
+	/* XIntc_Start - hw_interrupt enable and all interrupt enable */
+	intc->mer = 0x3;
+#ifdef DEBUG_INT
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+#endif
+}
+
+int interrupts_init (void)
+{
+	int i;
+	/* initialize irq list */
+	for (i = 0; i < CONFIG_XILINX_INTC_0_NUM_INTR_INPUTS; i++) {
+		vecs[i].handler = (interrupt_handler_t *) def_hdlr;
+		vecs[i].arg = (void *)i;
+		vecs[i].count = 0;
+	}
+	/* initialize intc controller */
+	intc_init ();
+#ifdef CFG_TIMER_0
+	timer_init ();
+#endif
+	enable_interrupts ();
+	return 0;
+}
+
+void interrupt_handler (void)
+{
+	int irqs;
+	irqs = (intc->isr & intc->ier);	/* find active interrupt */
+
+#ifdef DEBUG_INT
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+	printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
+#endif
+	struct irq_action *act = vecs;
+	while (irqs) {
+		if (irqs & 1) {
+#ifdef DEBUG_INT
+			printf
+			    ("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
+			     act->handler, act->count, act->arg);
+#endif
+			act->handler (act->arg);
+			act->count++;
+		}
+		irqs >>= 1;
+		act++;
+	}
+	intc->iar = 0xFFFFFFFF;	/* erase all events */
+#ifdef DEBUG
+	printf ("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
+		intc->ier, intc->iar, intc->mer);
+	printf ("Interrupt handler on %x line, r14\n", irqs);
+#endif
+}
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_IRQ)
+#ifdef CFG_INTC_0
+int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	int i;
+	struct irq_action *act = vecs;
+
+	puts ("\nInterrupt-Information:\n\n"
+	      "Nr  Routine   Arg       Count\n"
+	      "-----------------------------\n");
+
+	for (i = 0; i < CONFIG_XILINX_INTC_0_NUM_INTR_INPUTS; i++) {
+		if (act->handler != (interrupt_handler_t*) def_hdlr) {
+			printf ("%02d  %08lx  %08lx  %d\n", i,
+				(int)act->handler, (int)act->arg, act->count);
+		}
+		act++;
+	}
+	puts ("\n");
+	return (0);
+}
+#else
+int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	puts ("Undefined interrupt controller\n");
+}
+#endif
+#endif				/* CONFIG_COMMANDS & CFG_CMD_IRQ */

cpu/microblaze/start.S

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -13,7 +15,7 @@
  *
  * 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
+ * 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
@@ -27,10 +29,62 @@
 	.text
 	.global _start
 _start:
+	mts	rmsr, r0	/* disable cache */
+	addi	r1, r0, CFG_INIT_SP_OFFSET
+	/* add opcode instruction for 32bit jump - 2 instruction imm & brai*/
+	addi	r6, r0, 0xb000	/* hex b000 opcode imm */
+	bslli	r6, r6, 16	/* shift */
+	swi	r6, r0, 0x0	/* reset address */
+	swi	r6, r0, 0x8	/* user vector exception */
+	swi	r6, r0, 0x10	/* interrupt */
+	swi	r6, r0, 0x20	/* hardware exception */
 
-	addi	r1, r0, CFG_SDRAM_BASE	/* init stack pointer */
-	addi	r1, r1, CFG_SDRAM_SIZE	/* set sp to high up */
+	addi	r6, r0, 0xb808	/* hew b808 opcode brai*/
+	bslli	r6, r6, 16
+	swi	r6, r0, 0x4	/* reset address */
+	swi	r6, r0, 0xC	/* user vector exception */
+	swi	r6, r0, 0x14	/* interrupt */
+	swi	r6, r0, 0x24	/* hardware exception */
 
+#ifdef CFG_RESET_ADDRESS
+	/* reset address */
+	addik	r6, r0, CFG_RESET_ADDRESS
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0x2
+	shi	r6, r0, 0x6
+#endif
+
+#ifdef CFG_USR_EXCEP
+	/* user_vector_exception */
+	addik	r6, r0, _exception_handler
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0xa
+	shi	r6, r0, 0xe
+#endif
+
+#ifdef CFG_INTC_0
+	/* interrupt_handler */
+	addik	r6, r0, _interrupt_handler
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0x12
+	shi	r6, r0, 0x16
+#endif
+
+	/* hardware exception */
+	addik	r6, r0, _hw_exception_handler
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0x22
+	shi	r6, r0, 0x26
+
+	/* enable instruction and data cache */
+	mfs	r12, rmsr
+	ori	r12, r12, 0xa0
+	mts	rmsr, r12
+
+	/* jumping to board_init */
 	brai	board_init
-
 1:	bri	1b