Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / sparc / cpu / leon2 / interrupts.c

diff --git a/qemu/roms/u-boot/arch/sparc/cpu/leon2/interrupts.c b/qemu/roms/u-boot/arch/sparc/cpu/leon2/interrupts.c
new file mode 100644 (file)
index 0000000..f78ec8a
--- /dev/null
+++ b/qemu/roms/u-boot/arch/sparc/cpu/leon2/interrupts.c
@@ -0,0 +1,201 @@
+/*
+ * (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.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#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 > CONFIG_SYS_RAM_END) ||
+                   ((unsigned int)irq_handlers[irq].handler < CONFIG_SYS_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 > CONFIG_SYS_RAM_END) ||
+           ((unsigned int)handler < CONFIG_SYS_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 * const 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  %p  %p  %d\n", irq,
+                              irq_handlers[irq].handler,
+                              irq_handlers[irq].arg,
+                              irq_handlers[irq].count);
+               }
+       }
+}
+#endif