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-rw-r--r--cpu/microblaze/Makefile3
-rw-r--r--cpu/microblaze/cache.c48
-rw-r--r--cpu/microblaze/dcache.S68
-rw-r--r--cpu/microblaze/disable_int.S46
-rw-r--r--cpu/microblaze/enable_int.S38
-rw-r--r--cpu/microblaze/exception.c68
-rw-r--r--cpu/microblaze/icache.S69
-rw-r--r--cpu/microblaze/interrupts.c182
-rw-r--r--cpu/microblaze/irq.S165
-rw-r--r--cpu/microblaze/start.S91
-rw-r--r--cpu/microblaze/timer.c68
11 files changed, 838 insertions, 8 deletions
diff --git a/cpu/microblaze/Makefile b/cpu/microblaze/Makefile
index fd54425..db1afa5 100644
--- a/cpu/microblaze/Makefile
+++ b/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))
diff --git a/cpu/microblaze/cache.c b/cpu/microblaze/cache.c
new file mode 100644
index 0000000..fc388eb
--- /dev/null
+++ b/cpu/microblaze/cache.c
@@ -0,0 +1,48 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <moonstr@monstr.eu>
+ *
+ * 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>
+
+#if (CONFIG_COMMANDS & CFG_CMD_CACHE)
+
+int dcache_status (void)
+{
+ int i = 0;
+ int mask = 0x80;
+ __asm__ __volatile__ ("mfs %0,rmsr"::"r" (i):"memory");
+ /* i&=0x80 */
+ __asm__ __volatile__ ("and %0,%0,%1"::"r" (i), "r" (mask):"memory");
+ return i;
+}
+
+int icache_status (void)
+{
+ int i = 0;
+ int mask = 0x20;
+ __asm__ __volatile__ ("mfs %0,rmsr"::"r" (i):"memory");
+ /* i&=0x20 */
+ __asm__ __volatile__ ("and %0,%0,%1"::"r" (i), "r" (mask):"memory");
+ return i;
+}
+#endif
diff --git a/cpu/microblaze/dcache.S b/cpu/microblaze/dcache.S
new file mode 100644
index 0000000..eaf9671
--- /dev/null
+++ b/cpu/microblaze/dcache.S
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstr@monstr.eu>
+ *
+ * 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
+ */
+ .text
+ .globl dcache_enable
+ .ent dcache_enable
+ .align 2
+dcache_enable:
+ /* Make space on stack for a temporary */
+ addi r1, r1, -4
+ /* Save register r12 */
+ swi r12, r1, 0
+ /* Read the MSR register */
+ mfs r12, rmsr
+ /* Set the instruction enable bit */
+ ori r12, r12, 0x80
+ /* Save the MSR register */
+ mts rmsr, r12
+ /* Load register r12 */
+ lwi r12, r1, 0
+ /* Return */
+ rtsd r15, 8
+ /* Update stack in the delay slot */
+ addi r1, r1, 4
+ .end dcache_enable
+
+ .text
+ .globl dcache_disable
+ .ent dcache_disable
+ .align 2
+dcache_disable:
+ /* Make space on stack for a temporary */
+ addi r1, r1, -4
+ /* Save register r12 */
+ swi r12, r1, 0
+ /* Read the MSR register */
+ mfs r12, rmsr
+ /* Clear the data cache enable bit */
+ andi r12, r12, ~0x80
+ /* Save the MSR register */
+ mts rmsr, r12
+ /* Load register r12 */
+ lwi r12, r1, 0
+ /* Return */
+ rtsd r15, 8
+ /* Update stack in the delay slot */
+ addi r1, r1, 4
+ .end dcache_disable
diff --git a/cpu/microblaze/disable_int.S b/cpu/microblaze/disable_int.S
new file mode 100644
index 0000000..aecd795
--- /dev/null
+++ b/cpu/microblaze/disable_int.S
@@ -0,0 +1,46 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstr@monstr.eu>
+ *
+ * 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
+ */
+
+ .text
+ .globl microblaze_disable_interrupts
+ .ent microblaze_disable_interrupts
+ .align 2
+microblaze_disable_interrupts:
+ #Make space on stack for a temporary
+ addi r1, r1, -4
+ #Save register r12
+ swi r12, r1, 0
+ #Read the MSR register
+ mfs r12, rmsr
+ #Clear the interrupt enable bit
+ andi r12, r12, ~2
+ #Save the MSR register
+ mts rmsr, r12
+ #Load register r12
+ lwi r12, r1, 0
+ #Return
+ rtsd r15, 8
+ #Update stack in the delay slot
+ addi r1, r1, 4
+ .end microblaze_disable_interrupts
diff --git a/cpu/microblaze/enable_int.S b/cpu/microblaze/enable_int.S
new file mode 100644
index 0000000..c096c6c
--- /dev/null
+++ b/cpu/microblaze/enable_int.S
@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstrmonstr.eu>
+ *
+ * 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
+ */
+
+ .text
+ .globl microblaze_enable_interrupts
+ .ent microblaze_enable_interrupts
+ .align 2
+microblaze_enable_interrupts:
+ addi r1, r1, -4
+ swi r12, r1, 0
+ mfs r12, rmsr
+ ori r12, r12, 2
+ mts rmsr, r12
+ lwi r12, r1, 0
+ rtsd r15, 8
+ addi r1, r1, 4
+ .end microblaze_enable_interrupts
diff --git a/cpu/microblaze/exception.c b/cpu/microblaze/exception.c
new file mode 100644
index 0000000..b135acb
--- /dev/null
+++ b/cpu/microblaze/exception.c
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstr@monstr.eu>
+ *
+ * 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>
+
+void _hw_exception_handler (void)
+{
+ int address = 0;
+ int state = 0;
+ /* loading address of exception EAR */
+ __asm__ __volatile ("mfs %0,rear"::"r" (address):"memory");
+ /* loading excetpion state register ESR */
+ __asm__ __volatile ("mfs %0,resr"::"r" (state):"memory");
+ printf ("Hardware exception at 0x%x address\n", address);
+ switch (state & 0x1f) { /* mask on exception cause */
+ case 0x1:
+ puts ("Unaligned data access exception\n");
+ break;
+ case 0x2:
+ puts ("Illegal op-code exception\n");
+ break;
+ case 0x3:
+ puts ("Instruction bus error exception\n");
+ break;
+ case 0x4:
+ puts ("Data bus error exception\n");
+ break;
+ case 0x5:
+ puts ("Divide by zero exception\n");
+ break;
+ default:
+ puts ("Undefined cause\n");
+ break;
+ }
+ printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half"));
+ printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load"));
+ printf ("Register R%x\n", (state & 0x3E) >> 5);
+ hang ();
+}
+
+#ifdef CFG_USR_EXCEP
+void _exception_handler (void)
+{
+ puts ("User vector_exception\n");
+ hang ();
+}
+#endif
diff --git a/cpu/microblaze/icache.S b/cpu/microblaze/icache.S
new file mode 100644
index 0000000..25940d1
--- /dev/null
+++ b/cpu/microblaze/icache.S
@@ -0,0 +1,69 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstr@monstr.eu>
+ *
+ * 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
+ */
+
+ .text
+ .globl icache_enable
+ .ent icache_enable
+ .align 2
+icache_enable:
+ /* Make space on stack for a temporary */
+ addi r1, r1, -4
+ /* Save register r12 */
+ swi r12, r1, 0
+ /* Read the MSR register */
+ mfs r12, rmsr
+ /* Set the instruction enable bit */
+ ori r12, r12, 0x20
+ /* Save the MSR register */
+ mts rmsr, r12
+ /* Load register r12 */
+ lwi r12, r1, 0
+ /* Return */
+ rtsd r15, 8
+ /* Update stack in the delay slot */
+ addi r1, r1, 4
+ .end icache_enable
+
+ .text
+ .globl icache_disable
+ .ent icache_disable
+ .align 2
+icache_disable:
+ /* Make space on stack for a temporary */
+ addi r1, r1, -4
+ /* Save register r12 */
+ swi r12, r1, 0
+ /* Read the MSR register */
+ mfs r12, rmsr
+ /* Clear the instruction enable bit */
+ andi r12, r12, ~0x20
+ /* Save the MSR register */
+ mts rmsr, r12
+ /* Load register r12 */
+ lwi r12, r1, 0
+ /* Return */
+ rtsd r15, 8
+ /* Update stack in the delay slot */
+ addi r1, r1, 4
+ .end icache_disable
diff --git a/cpu/microblaze/interrupts.c b/cpu/microblaze/interrupts.c
index ccf67e1..2db847c 100644
--- a/cpu/microblaze/interrupts.c
+++ b/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 > CFG_INTC_0_NUM)) {
+ 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 < CFG_INTC_0_NUM; 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 < CFG_INTC_0_NUM; 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 */
diff --git a/cpu/microblaze/irq.S b/cpu/microblaze/irq.S
new file mode 100644
index 0000000..a4e3fbf
--- /dev/null
+++ b/cpu/microblaze/irq.S
@@ -0,0 +1,165 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstr@monstr.eu>
+ *
+ * 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 <config.h>
+ .text
+ .global _interrupt_handler
+_interrupt_handler:
+ addi r1, r1, -4
+ swi r2, r1, 0
+ addi r1, r1, -4
+ swi r3, r1, 0
+ addi r1, r1, -4
+ swi r4, r1, 0
+ addi r1, r1, -4
+ swi r5, r1, 0
+ addi r1, r1, -4
+ swi r6, r1, 0
+ addi r1, r1, -4
+ swi r7, r1, 0
+ addi r1, r1, -4
+ swi r8, r1, 0
+ addi r1, r1, -4
+ swi r9, r1, 0
+ addi r1, r1, -4
+ swi r10, r1, 0
+ addi r1, r1, -4
+ swi r11, r1, 0
+ addi r1, r1, -4
+ swi r12, r1, 0
+ addi r1, r1, -4
+ swi r13, r1, 0
+ addi r1, r1, -4
+ swi r14, r1, 0
+ addi r1, r1, -4
+ swi r15, r1, 0
+ addi r1, r1, -4
+ swi r16, r1, 0
+ addi r1, r1, -4
+ swi r17, r1, 0
+ addi r1, r1, -4
+ swi r18, r1, 0
+ addi r1, r1, -4
+ swi r19, r1, 0
+ addi r1, r1, -4
+ swi r20, r1, 0
+ addi r1, r1, -4
+ swi r21, r1, 0
+ addi r1, r1, -4
+ swi r22, r1, 0
+ addi r1, r1, -4
+ swi r23, r1, 0
+ addi r1, r1, -4
+ swi r24, r1, 0
+ addi r1, r1, -4
+ swi r25, r1, 0
+ addi r1, r1, -4
+ swi r26, r1, 0
+ addi r1, r1, -4
+ swi r27, r1, 0
+ addi r1, r1, -4
+ swi r28, r1, 0
+ addi r1, r1, -4
+ swi r29, r1, 0
+ addi r1, r1, -4
+ swi r30, r1, 0
+ addi r1, r1, -4
+ swi r31, r1, 0
+ brlid r15, interrupt_handler
+ nop
+ nop
+ lwi r31, r1, 0
+ addi r1, r1, 4
+ lwi r30, r1, 0
+ addi r1, r1, 4
+ lwi r29, r1, 0
+ addi r1, r1, 4
+ lwi r28, r1, 0
+ addi r1, r1, 4
+ lwi r27, r1, 0
+ addi r1, r1, 4
+ lwi r26, r1, 0
+ addi r1, r1, 4
+ lwi r25, r1, 0
+ addi r1, r1, 4
+ lwi r24, r1, 0
+ addi r1, r1, 4
+ lwi r23, r1, 0
+ addi r1, r1, 4
+ lwi r22, r1, 0
+ addi r1, r1, 4
+ lwi r21, r1, 0
+ addi r1, r1, 4
+ lwi r20, r1, 0
+ addi r1, r1, 4
+ lwi r19, r1, 0
+ addi r1, r1, 4
+ lwi r18, r1, 0
+ addi r1, r1, 4
+ lwi r17, r1, 0
+ addi r1, r1, 4
+ lwi r16, r1, 0
+ addi r1, r1, 4
+ lwi r15, r1, 0
+ addi r1, r1, 4
+ lwi r14, r1, 0
+ addi r1, r1, 4
+ lwi r13, r1, 0
+ addi r1, r1, 4
+ lwi r12, r1, 0
+ addi r1, r1, 4
+ lwi r11, r1, 0
+ addi r1, r1, 4
+ lwi r10, r1, 0
+ addi r1, r1, 4
+ lwi r9, r1, 0
+ addi r1, r1, 4
+ lwi r8, r1, 0
+ addi r1, r1, 4
+ lwi r7, r1, 0
+ addi r1, r1, 4
+ lwi r6, r1, 0
+ addi r1, r1, 4
+ lwi r5, r1, 0
+ addi r1, r1, 4
+ lwi r4, r1, 0
+ addi r1, r1, 4
+ lwi r3, r1, 0
+ addi r1, r1, 4
+ lwi r2, r1, 0
+ addi r1, r1, 4
+
+ /* enable_interrupt */
+ addi r1, r1, -4
+ swi r12, r1, 0
+ mfs r12, rmsr
+ ori r12, r12, 2
+ mts rmsr, r12
+ lwi r12, r1, 0
+ addi r1, r1, 4
+ nop
+ bra r14
+ nop
+ nop
+ .size _interrupt_handler,.-_interrupt_handler
diff --git a/cpu/microblaze/start.S b/cpu/microblaze/start.S
index 7efdbb0..29481af 100644
--- a/cpu/microblaze/start.S
+++ b/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 +29,91 @@
.text
.global _start
_start:
+ mts rmsr, r0 /* disable cache */
+ addi r1, r0, CFG_INIT_SP_OFFSET
+ addi r1, r1, -4 /* Decrement SP to top of memory */
+ /* 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 */
- brai board_init
+#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
+/*
+ * Copy U-Boot code to TEXT_BASE
+ * solve problem with sbrk_base
+ */
+#if (CFG_RESET_ADDRESS != TEXT_BASE)
+ addi r4, r0, __end
+ addi r5, r0, __text_start
+ rsub r4, r5, r4 /* size = __end - __text_start */
+ addi r6, r0, CFG_RESET_ADDRESS /* source address */
+ addi r7, r0, 0 /* counter */
+4:
+ lw r8, r6, r7
+ sw r8, r5, r7
+ addi r7, r7, 0x4
+ cmp r8, r4, r7
+ blti r8, 4b
+#endif
+#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
+
+clear_bss:
+ /* clear BSS segments */
+ addi r5, r0, __bss_start
+ addi r4, r0, __bss_end
+ cmp r6, r5, r4
+ beqi r6, 3f
+2:
+ swi r0, r5, 0 /* write zero to loc */
+ addi r5, r5, 4 /* increment to next loc */
+ cmp r6, r5, r4 /* check if we have reach the end */
+ bnei r6, 2b
+3: /* jumping to board_init */
+ brai board_init
1: bri 1b
diff --git a/cpu/microblaze/timer.c b/cpu/microblaze/timer.c
new file mode 100644
index 0000000..be4fd57
--- /dev/null
+++ b/cpu/microblaze/timer.c
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal SIMEK <monstr@monstr.eu>
+ *
+ * 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/microblaze_timer.h>
+
+volatile int timestamp = 0;
+
+void reset_timer (void)
+{
+ timestamp = 0;
+}
+
+ulong get_timer (ulong base)
+{
+ return (timestamp - base);
+}
+
+void set_timer (ulong t)
+{
+ timestamp = t;
+}
+
+#ifdef CFG_INTC_0
+#ifdef CFG_TIMER_0
+extern void install_interrupt_handler (int irq, interrupt_handler_t * hdlr,
+ void *arg);
+
+microblaze_timer_t *tmr = (microblaze_timer_t *) (CFG_TIMER_0_ADDR);
+
+void timer_isr (void *arg)
+{
+ timestamp++;
+ tmr->control = tmr->control | TIMER_INTERRUPT;
+}
+
+void timer_init (void)
+{
+ tmr->loadreg = CFG_TIMER_0_PRELOAD;
+ tmr->control = TIMER_INTERRUPT | TIMER_RESET;
+ tmr->control =
+ TIMER_ENABLE | TIMER_ENABLE_INTR | TIMER_RELOAD | TIMER_DOWN_COUNT;
+ reset_timer ();
+ install_interrupt_handler (CFG_TIMER_0_IRQ, timer_isr, (void *)tmr);
+}
+#endif
+#endif
generated by cgit v1.1 at 2024-11-23 14:11:39 +0000