[U-Boot-Users] ppc4xx: [PATCH] CPU PPC440x5 on Virtex5 FX (new version)

Ricardo Ribalda Delgado
2008-07-16T01:14:32Z

Previous patch did not compile on some boards

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@uam.es>
---
-This patchs gives support for the embbedded ppc440
on the Virtex5 FPGAs

-interrupts.c divided in uic.c and interrupts.c

-xilinx_irq.c for xilinx interrupt controller

cpu/ppc4xx/Makefile | 13 +++
cpu/ppc4xx/cpu.c | 8 ++
cpu/ppc4xx/interrupts.c | 178 ++++++------------------------------
cpu/ppc4xx/speed.c | 6 +-
cpu/ppc4xx/uic.c | 210 +++++++++++++++++++++++++++++++++++++++++++
cpu/ppc4xx/xilinx_irq.c | 111 +++++++++++++++++++++++
include/asm-ppc/interrupt.h | 37 ++++++++
include/asm-ppc/processor.h | 2 +
8 files changed, 416 insertions(+), 149 deletions(-)
create mode 100644 cpu/ppc4xx/uic.c
create mode 100644 cpu/ppc4xx/xilinx_irq.c
create mode 100644 include/asm-ppc/interrupt.h

diff --git a/cpu/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index 800bb41..9d918c9 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/Makefile
@@ -35,10 +35,14 @@ SOBJS += kgdb.o
COBJS := 40x_spd_sdram.o
COBJS += 44x_spd_ddr.o
COBJS += 44x_spd_ddr2.o
+ifndef CONFIG_XILINX_440
COBJS += 4xx_enet.o
+endif
COBJS += 4xx_pci.o
COBJS += 4xx_pcie.o
+ifndef CONFIG_XILINX_440
COBJS += 4xx_uart.o
+endif
COBJS += bedbug_405.o
COBJS += commproc.o
COBJS += cpu.o
@@ -47,11 +51,20 @@ COBJS += denali_data_eye.o
COBJS += denali_spd_ddr2.o
COBJS += ecc.o
COBJS += fdt.o
+ifndef CONFIG_XILINX_440
COBJS += gpio.o
+endif
COBJS += i2c.o
COBJS += interrupts.o
+ifndef CONFIG_XILINX_440
+COBJS += uic.o
+else
+COBJS += xilinx_irq.o
+endif
COBJS += iop480_uart.o
+ifndef CONFIG_XILINX_440
COBJS += miiphy.o
+endif
COBJS += ndfc.o
COBJS += sdram.o
COBJS += speed.o
diff --git a/cpu/ppc4xx/cpu.c b/cpu/ppc4xx/cpu.c
index ef32bc6..775ed01 100644
--- a/cpu/ppc4xx/cpu.c
+++ b/cpu/ppc4xx/cpu.c
@@ -279,7 +279,11 @@ int checkcpu (void)

get_sys_info(&sys_info);

+#if defined(CONFIG_XILINX_440)
+ puts("IBM PowerPC 4");
+#else
puts("AMCC PowerPC 4");
+#endif

#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
@@ -541,6 +545,10 @@ int checkcpu (void)
puts("GX Rev. A");
strcpy(addstr, "No Security support");
break;
+
+ case PVR_VIRTEX5:
+ puts(" VIRTEX5");
+ break;

default:
printf (" UNKNOWN (PVR=%08x)", pvr);
diff --git a/cpu/ppc4xx/interrupts.c b/cpu/ppc4xx/interrupts.c
index 8215dc6..58d1d81 100644
--- a/cpu/ppc4xx/interrupts.c
+++ b/cpu/ppc4xx/interrupts.c
@@ -8,6 +8,10 @@
* (C) Copyright 2003 (440GX port)
* Travis B. Sawyer, Sandburst Corporation, tsawyer at sandburst.com
*
+ * (C) Copyright 2008 (PPC440X05 port for Virtex 5 FX)
+ * Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda at uam.es
+ * Work supported by Qtechnology (htpp://qtec.com)
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -31,23 +35,11 @@
#include <watchdog.h>
#include <command.h>
#include <asm/processor.h>
+#include <asm/interrupt.h>
#include <ppc4xx.h>
#include <ppc_asm.tmpl>
#include <commproc.h>

-#if (UIC_MAX > 3)
-#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
- UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI) | \
- UIC_MASK(VECNUM_UIC3CI) | UIC_MASK(VECNUM_UIC3NCI))
-#elif (UIC_MAX > 2)
-#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
- UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI))
-#elif (UIC_MAX > 1)
-#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI))
-#else
-#define UICB0_ALL 0
-#endif
-
DECLARE_GLOBAL_DATA_PTR;

/*
@@ -58,11 +50,7 @@ struct irq_action {
void *arg;
int count;
};
-
-static struct irq_action irq_vecs[UIC_MAX * 32];
-
-u32 get_dcr(u16);
-void set_dcr(u16, u32);
+static struct irq_action irq_vecs[IRQ_MAX];

#if defined(CONFIG_440)

@@ -103,7 +91,7 @@ int interrupt_init_cpu (unsigned *decrementer_count)
/*
* Mark all irqs as free
*/
- for (vec = 0; vec < (UIC_MAX * 32); vec++) {
+ for (vec = 0; vec < IRQ_MAX; vec++) {
irq_vecs[vec].handler = NULL;
irq_vecs[vec].arg = NULL;
irq_vecs[vec].count = 0;
@@ -147,110 +135,36 @@ int interrupt_init_cpu (unsigned *decrementer_count)
*/
set_evpr(0x00000000);

-#if (UIC_MAX > 1)
- /* Install the UIC1 handlers */
- irq_install_handler(VECNUM_UIC1NCI, (void *)(void *)external_interrupt, 0);
- irq_install_handler(VECNUM_UIC1CI, (void *)(void *)external_interrupt, 0);
-#endif
-#if (UIC_MAX > 2)
- irq_install_handler(VECNUM_UIC2NCI, (void *)(void *)external_interrupt, 0);
- irq_install_handler(VECNUM_UIC2CI, (void *)(void *)external_interrupt, 0);
-#endif
-#if (UIC_MAX > 3)
- irq_install_handler(VECNUM_UIC3NCI, (void *)(void *)external_interrupt, 0);
- irq_install_handler(VECNUM_UIC3CI, (void *)(void *)external_interrupt, 0);
-#endif
+ /*
+ *Call uic or xilinx_irq pic_enable
+ */
+ pic_enable();

return (0);
}

-/* Handler for UIC interrupt */
-static void uic_interrupt(u32 uic_base, int vec_base)
+void timer_interrupt_cpu(struct pt_regs *regs)
{
- u32 uic_msr;
- u32 msr_shift;
- int vec;
-
- /*
- * Read masked interrupt status register to determine interrupt source
- */
- uic_msr = get_dcr(uic_base + UIC_MSR);
- msr_shift = uic_msr;
- vec = vec_base;
-
- while (msr_shift != 0) {
- if (msr_shift & 0x80000000) {
- /*
- * Increment irq counter (for debug purpose only)
- */
- irq_vecs[vec].count++;
-
- if (irq_vecs[vec].handler != NULL) {
- /* call isr */
- (*irq_vecs[vec].handler)(irq_vecs[vec].arg);
- } else {
- set_dcr(uic_base + UIC_ER,
- get_dcr(uic_base + UIC_ER) & ~UIC_MASK(vec));
- printf("Masking bogus interrupt vector %d"
- " (UIC_BASE=0x%x)\n", vec, uic_base);
- }
-
- /*
- * After servicing the interrupt, we have to remove the
- * status indicator
- */
- set_dcr(uic_base + UIC_SR, UIC_MASK(vec));
- }
-
- /*
- * Shift msr to next position and increment vector
- */
- msr_shift <<= 1;
- vec++;
- }
+ /* nothing to do here */
+ return;
}

-/*
- * Handle external interrupts
- */
-void external_interrupt(struct pt_regs *regs)
+void interrupt_run_handler(int vec)
{
- u32 uic_msr;
-
- /*
- * Read masked interrupt status register to determine interrupt source
- */
- uic_msr = mfdcr(uic0msr);
-
-#if (UIC_MAX > 1)
- if ((UIC_MASK(VECNUM_UIC1CI) & uic_msr) ||
- (UIC_MASK(VECNUM_UIC1NCI) & uic_msr))
- uic_interrupt(UIC1_DCR_BASE, 32);
-#endif
-
-#if (UIC_MAX > 2)
- if ((UIC_MASK(VECNUM_UIC2CI) & uic_msr) ||
- (UIC_MASK(VECNUM_UIC2NCI) & uic_msr))
- uic_interrupt(UIC2_DCR_BASE, 64);
-#endif
-
-#if (UIC_MAX > 3)
- if ((UIC_MASK(VECNUM_UIC3CI) & uic_msr) ||
- (UIC_MASK(VECNUM_UIC3NCI) & uic_msr))
- uic_interrupt(UIC3_DCR_BASE, 96);
-#endif
-
- if (uic_msr & ~(UICB0_ALL))
- uic_interrupt(UIC0_DCR_BASE, 0);
-
- mtdcr(uic0sr, uic_msr);
+ irq_vecs[vec].count++;
+
+ if (irq_vecs[vec].handler != NULL) {
+ /* call isr */
+ (*irq_vecs[vec].handler) (irq_vecs[vec].arg);
+ } else {
+ pic_irq_disable(vec);
+ printf("Masking bogus interrupt vector %d\n", vec);
+ }

+ pic_irq_ack(vec);
return;
}

-/*
- * Install and free a interrupt handler.
- */
void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg)
{
/*
@@ -263,51 +177,19 @@ void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg)
irq_vecs[vec].handler = handler;
irq_vecs[vec].arg = arg;

- if ((vec >= 0) && (vec < 32))
- mtdcr(uicer, mfdcr(uicer) | UIC_MASK(vec));
-#if (UIC_MAX > 1)
- else if ((vec >= 32) && (vec < 64))
- mtdcr(uic1er, mfdcr(uic1er) | UIC_MASK(vec));
-#endif
-#if (UIC_MAX > 2)
- else if ((vec >= 64) && (vec < 96))
- mtdcr(uic2er, mfdcr(uic2er) | UIC_MASK(vec));
-#endif
-#if (UIC_MAX > 3)
- else if (vec >= 96)
- mtdcr(uic3er, mfdcr(uic3er) | UIC_MASK(vec));
-#endif
-
- debug("Install interrupt for vector %d ==> %p\n", vec, handler);
+ pic_irq_enable(vec);
+ return;
}

-void irq_free_handler (int vec)
+void irq_free_handler(int vec)
{
debug("Free interrupt for vector %d ==> %p\n",
vec, irq_vecs[vec].handler);

- if ((vec >= 0) && (vec < 32))
- mtdcr(uicer, mfdcr(uicer) & ~UIC_MASK(vec));
-#if (UIC_MAX > 1)
- else if ((vec >= 32) && (vec < 64))
- mtdcr(uic1er, mfdcr(uic1er) & ~UIC_MASK(vec));
-#endif
-#if (UIC_MAX > 2)
- else if ((vec >= 64) && (vec < 96))
- mtdcr(uic2er, mfdcr(uic2er) & ~UIC_MASK(vec));
-#endif
-#if (UIC_MAX > 3)
- else if (vec >= 96)
- mtdcr(uic3er, mfdcr(uic3er) & ~UIC_MASK(vec));
-#endif
+ pic_irq_disable(vec);

irq_vecs[vec].handler = NULL;
irq_vecs[vec].arg = NULL;
-}
-
-void timer_interrupt_cpu (struct pt_regs *regs)
-{
- /* nothing to do here */
return;
}

@@ -319,7 +201,7 @@ int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
printf ("Interrupt-Information:\n");
printf ("Nr Routine Arg Count\n");

- for (vec = 0; vec < (UIC_MAX * 32); vec++) {
+ for (vec = 0; vec < IRQ_MAX; vec++) {
if (irq_vecs[vec].handler != NULL) {
printf ("%02d %08lx %08lx %d\n",
vec,
diff --git a/cpu/ppc4xx/speed.c b/cpu/ppc4xx/speed.c
index b86b6de..d21bd82 100644
--- a/cpu/ppc4xx/speed.c
+++ b/cpu/ppc4xx/speed.c
@@ -416,7 +416,8 @@ ulong get_PCI_freq (void)
return sys_info.freqPCI;
}

-#elif !defined(CONFIG_440GX) && !defined(CONFIG_440SP) && !defined(CONFIG_440SPE)
+#elif !defined(CONFIG_440GX) && !defined(CONFIG_440SP) && !defined(CONFIG_440SPE) \
+ && !defined(CONFIG_XILINX_440)
void get_sys_info (sys_info_t * sysInfo)
{
unsigned long strp0;
@@ -449,6 +450,8 @@ void get_sys_info (sys_info_t * sysInfo)
sysInfo->freqUART = sysInfo->freqPLB;
}
#else
+
+#if !defined(CONFIG_XILINX_440)
void get_sys_info (sys_info_t * sysInfo)
{
unsigned long strp0;
@@ -535,6 +538,7 @@ void get_sys_info (sys_info_t * sysInfo)
}

#endif
+#endif /* CONFIG_XILINX_440 */

#if defined(CONFIG_YUCCA)
unsigned long determine_sysper(void)
diff --git a/cpu/ppc4xx/uic.c b/cpu/ppc4xx/uic.c
new file mode 100644
index 0000000..102b67a
--- /dev/null
+++ b/cpu/ppc4xx/uic.c
@@ -0,0 +1,210 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * (C) Copyright 2002 (440 port)
+ * Scott McNutt, Artesyn Communication Producs, smcnutt at artsyncp.com
+ *
+ * (C) Copyright 2003 (440GX port)
+ * Travis B. Sawyer, Sandburst Corporation, tsawyer at sandburst.com
+ *
+ * (C) Copyright 2008 (PPC440X05 port for Virtex 5 FX)
+ * Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda at uam.es
+ * Work supported by Qtechnology (htpp://qtec.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>
+#include <asm/processor.h>
+#include <asm/interrupt.h>
+#include <ppc4xx.h>
+#include <ppc_asm.tmpl>
+#include <commproc.h>
+
+#if (UIC_MAX > 3)
+#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
+ UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI) | \
+ UIC_MASK(VECNUM_UIC3CI) | UIC_MASK(VECNUM_UIC3NCI))
+#elif (UIC_MAX > 2)
+#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
+ UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI))
+#elif (UIC_MAX > 1)
+#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI))
+#else
+#define UICB0_ALL 0
+#endif
+
+u32 get_dcr(u16);
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void pic_enable(void)
+{
+
+#if (UIC_MAX > 1)
+ /* Install the UIC1 handlers */
+ irq_install_handler(VECNUM_UIC1NCI, (void *)(void *)external_interrupt,
+ 0);
+ irq_install_handler(VECNUM_UIC1CI, (void *)(void *)external_interrupt,
+ 0);
+#endif
+#if (UIC_MAX > 2)
+ irq_install_handler(VECNUM_UIC2NCI, (void *)(void *)external_interrupt,
+ 0);
+ irq_install_handler(VECNUM_UIC2CI, (void *)(void *)external_interrupt,
+ 0);
+#endif
+#if (UIC_MAX > 3)
+ irq_install_handler(VECNUM_UIC3NCI, (void *)(void *)external_interrupt,
+ 0);
+ irq_install_handler(VECNUM_UIC3CI, (void *)(void *)external_interrupt,
+ 0);
+#endif
+
+}
+
+
+/* Handler for UIC interrupt */
+static void uic_interrupt(u32 uic_base, int vec_base)
+{
+ u32 uic_msr;
+ u32 msr_shift;
+ int vec;
+
+ /*
+ * Read masked interrupt status register to determine interrupt source
+ */
+ uic_msr = get_dcr(uic_base + UIC_MSR);
+ msr_shift = uic_msr;
+ vec = vec_base;
+
+ while (msr_shift != 0) {
+ if (msr_shift & 0x80000000)
+ interrupt_run_handler(vec);
+ /*
+ * Shift msr to next position and increment vector
+ */
+ msr_shift <<= 1;
+ vec++;
+ }
+}
+
+/*
+ * Handle external interrupts
+ */
+void external_interrupt(struct pt_regs *regs)
+{
+ u32 uic_msr;
+
+ /*
+ * Read masked interrupt status register to determine interrupt source
+ */
+ uic_msr = mfdcr(uic0msr);
+
+#if (UIC_MAX > 1)
+ if ((UIC_MASK(VECNUM_UIC1CI) & uic_msr) ||
+ (UIC_MASK(VECNUM_UIC1NCI) & uic_msr))
+ uic_interrupt(UIC1_DCR_BASE, 32);
+#endif
+
+#if (UIC_MAX > 2)
+ if ((UIC_MASK(VECNUM_UIC2CI) & uic_msr) ||
+ (UIC_MASK(VECNUM_UIC2NCI) & uic_msr))
+ uic_interrupt(UIC2_DCR_BASE, 64);
+#endif
+
+#if (UIC_MAX > 3)
+ if ((UIC_MASK(VECNUM_UIC3CI) & uic_msr) ||
+ (UIC_MASK(VECNUM_UIC3NCI) & uic_msr))
+ uic_interrupt(UIC3_DCR_BASE, 96);
+#endif
+
+ if (uic_msr & ~(UICB0_ALL))
+ uic_interrupt(UIC0_DCR_BASE, 0);
+
+ mtdcr(uic0sr, uic_msr);
+
+ return;
+}
+
+void pic_irq_ack(unsigned int vec)
+{
+
+ if ((vec >= 0) && (vec < 32))
+ mtdcr(uicsr, UIC_MASK(vec));
+#if (UIC_MAX > 1)
+ else if ((vec >= 32) && (vec < 64))
+ mtdcr(uic1sr, UIC_MASK(vec));
+#endif
+#if (UIC_MAX > 2)
+ else if ((vec >= 64) && (vec < 96))
+ mtdcr(uic2sr, UIC_MASK(vec));
+#endif
+#if (UIC_MAX > 3)
+ else if (vec >= 96)
+ mtdcr(uic3sr, UIC_MASK(vec));
+#endif
+}
+
+/*
+ * Install and free a interrupt handler.
+ */
+void pic_irq_enable(unsigned int vec)
+{
+
+ if ((vec >= 0) && (vec < 32))
+ mtdcr(uicer, mfdcr(uicer) | UIC_MASK(vec));
+#if (UIC_MAX > 1)
+ else if ((vec >= 32) && (vec < 64))
+ mtdcr(uic1er, mfdcr(uic1er) | UIC_MASK(vec));
+#endif
+#if (UIC_MAX > 2)
+ else if ((vec >= 64) && (vec < 96))
+ mtdcr(uic2er, mfdcr(uic2er) | UIC_MASK(vec));
+#endif
+#if (UIC_MAX > 3)
+ else if (vec >= 96)
+ mtdcr(uic3er, mfdcr(uic3er) | UIC_MASK(vec));
+#endif
+
+ debug("Install interrupt for vector %d ==> %p\n", vec, handler);
+}
+
+void pic_irq_disable(unsigned int vec)
+{
+
+ if ((vec >= 0) && (vec < 32))
+ mtdcr(uicer, mfdcr(uicer) & ~UIC_MASK(vec));
+#if (UIC_MAX > 1)
+ else if ((vec >= 32) && (vec < 64))
+ mtdcr(uic1er, mfdcr(uic1er) & ~UIC_MASK(vec));
+#endif
+#if (UIC_MAX > 2)
+ else if ((vec >= 64) && (vec < 96))
+ mtdcr(uic2er, mfdcr(uic2er) & ~UIC_MASK(vec));
+#endif
+#if (UIC_MAX > 3)
+ else if (vec >= 96)
+ mtdcr(uic3er, mfdcr(uic3er) & ~UIC_MASK(vec));
+#endif
+
+}
diff --git a/cpu/ppc4xx/xilinx_irq.c b/cpu/ppc4xx/xilinx_irq.c
new file mode 100644
index 0000000..f2dbcc8
--- /dev/null
+++ b/cpu/ppc4xx/xilinx_irq.c
@@ -0,0 +1,111 @@
+/*
+ * (C) Copyright 2008
+ * Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda at uam.es
+ * This work has been supported by: QTechnology http://qtec.com/
+ * Based on interrupts.c Wolfgang Denk-DENX Software Engineering-wd at denx.de
+ * 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, see <http://www.gnu.org/licenses/>.
+*/
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <asm/interrupt.h>
+#include <ppc4xx.h>
+#include <ppc_asm.tmpl>
+#include <commproc.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define intc XPAR_INTC_0_BASEADDR
+#define ISR (u32*)(intc+(0*4)) /* Interrupt Status Register */
+#define IPR (u32*)(intc+(1*4)) /* Interrupt Pending Register */
+#define IER (u32*)(intc+(2*4)) /* Interrupt Enable Register */
+#define IAR (u32*)(intc+(3*4)) /* Interrupt Acknowledge Register */
+#define SIE (u32*)(intc+(4*4)) /* Set Interrupt Enable bits */
+#define CIE (u32*)(intc+(5*4)) /* Clear Interrupt Enable bits */
+#define IVR (u32*)(intc+(6*4)) /* Interrupt Vector Register */
+#define MER (u32*)(intc+(7*4)) /* Master Enable Register */
+
+#define IRQ_MASK(irq) (1<<(irq&0x1f))
+
+void pic_enable(void)
+{
+ printf("Xilinx PIC@0x%8x\n", intc);
+
+ /*
+ * Disable all external interrupts until they are
+ * explicitly requested.
+ */
+ out_be32(IER, 0);
+
+ /* Acknowledge any pending interrupts just in case. */
+ out_be32(IAR, ~(u32) 0);
+
+ /* Turn on the Master Enable. */
+ out_be32(MER, 0x3UL);
+
+ return;
+}
+
+int xilinx_pic_irq_get(void)
+{
+ u32 irq;
+ irq = in_be32(IVR);
+
+ /* If no interrupt is pending then all bits of the IVR are set to 1. As
+ * the IVR is as many bits wide as numbers of inputs are available.
+ * Therefore, if all bits of the IVR are set to one, its content will
+ * be bigger than XPAR_INTC_MAX_NUM_INTR_INPUTS.
+ */
+ if (irq >= XPAR_INTC_MAX_NUM_INTR_INPUTS)
+ irq = -1; /* report no pending interrupt. */
+
+ debug("get_irq: %d\n", irq);
+ return (irq);
+}
+
+void pic_irq_enable(unsigned int irq)
+{
+ unsigned long mask = IRQ_MASK(irq);
+ debug("enable: %d\n", irq);
+ out_be32(SIE, mask);
+}
+
+void pic_irq_disable(unsigned int irq)
+{
+ unsigned long mask = IRQ_MASK(irq);
+ debug("disable: %d\n", irq);
+ out_be32(CIE, mask);
+}
+
+void pic_irq_ack(unsigned int irq)
+{
+ unsigned long mask = IRQ_MASK(irq);
+ debug("ack: %d\n", irq);
+ out_be32(IAR, mask);
+}
+
+void external_interrupt(struct pt_regs *regs)
+{
+ int irq;
+
+ irq = xilinx_pic_irq_get();
+ if (irq < 0)
+ return;
+
+ interrupt_run_handler(irq);
+
+ return;
+}
diff --git a/include/asm-ppc/interrupt.h b/include/asm-ppc/interrupt.h
new file mode 100644
index 0000000..6c84a84
--- /dev/null
+++ b/include/asm-ppc/interrupt.h
@@ -0,0 +1,37 @@
+/*
+ * (C) Copyright 2008
+ * Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda at uam.es
+ * This work has been supported by: QTechnology http://qtec.com/
+ * Based on interrupts.c Wolfgang Denk-DENX Software Engineering-wd@denx.de
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef INTERRUPT_H
+#define INTERRUPT_H
+
+
+#if defined(CONFIG_440_VIRTEX5)
+#define IRQ_MAX XPAR_INTC_MAX_NUM_INTR_INPUTS
+#else
+#define IRQ_MAX UIC_MAX * 32
+#endif
+
+void pic_enable(void);
+void pic_irq_enable(unsigned int irq);
+void pic_irq_disable(unsigned int irq);
+void pic_irq_ack(unsigned int irq);
+void external_interrupt(struct pt_regs *regs);
+void interrupt_run_handler(int vec);
+
+#endif
diff --git a/include/asm-ppc/processor.h b/include/asm-ppc/processor.h
index 6e134c3..5501244 100644
--- a/include/asm-ppc/processor.h
+++ b/include/asm-ppc/processor.h
@@ -839,6 +839,8 @@
#define PVR_86xx 0x80040000
#define PVR_86xx_REV1 (PVR_86xx | 0x0010)

+#define PVR_VIRTEX5 0x7ff21912
+
/*
* For the 8xx processors, all of them report the same PVR family for
* the PowerPC core. The various versions of these processors must be
--
1.5.6.2