1 files changed, 203 insertions, 0 deletions

diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
new file mode 100644
index 000000000000..54d8a5bd4824
--- /dev/null
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
+ * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/interrupt.h>
+#include <linux/of_device.h>
+#include <asm/oplib.h>
+#include <asm/timer.h>
+#include <asm/prom.h>
+#include <asm/leon.h>
+#include <asm/leon_amba.h>
+
+#include "prom.h"
+#include "irq.h"
+
+struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address, initialized by amba_init() */
+struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address, initialized by amba_init() */
+struct amba_apb_device leon_percpu_timer_dev[16];
+
+int leondebug_irq_disable;
+int leon_debug_irqout;
+static int dummy_master_l10_counter;
+
+unsigned long leon3_gptimer_irq; /* interrupt controller irq number, initialized by amba_init() */
+unsigned int sparc_leon_eirq;
+#define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
+
+/* Return the IRQ of the pending IRQ on the extended IRQ controller */
+int sparc_leon_eirq_get(int eirq, int cpu)
+{
+        return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
+}
+
+irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id)
+{
+        printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n");
+        return IRQ_HANDLED;
+}
+
+/* The extended IRQ controller has been found, this function registers it */
+void sparc_leon_eirq_register(int eirq)
+{
+        int irq;
+
+        /* Register a "BAD" handler for this interrupt, it should never happen */
+        irq = request_irq(eirq, sparc_leon_eirq_isr,
+                          (IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL);
+
+        if (irq) {
+                printk(KERN_ERR
+                       "sparc_leon_eirq_register: unable to attach IRQ%d\n",
+                       eirq);
+        } else {
+                sparc_leon_eirq = eirq;
+        }
+
+}
+
+static inline unsigned long get_irqmask(unsigned int irq)
+{
+        unsigned long mask;
+
+        if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
+            || ((irq > 0x1f) && sparc_leon_eirq)) {
+                printk(KERN_ERR
+                       "leon_get_irqmask: false irq number: %d\n", irq);
+                mask = 0;
+        } else {
+                mask = LEON_HARD_INT(irq);
+        }
+        return mask;
+}
+
+static void leon_enable_irq(unsigned int irq_nr)
+{
+        unsigned long mask, flags;
+        mask = get_irqmask(irq_nr);
+        local_irq_save(flags);
+        LEON3_BYPASS_STORE_PA(LEON_IMASK,
+                              (LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask)));
+        local_irq_restore(flags);
+}
+
+static void leon_disable_irq(unsigned int irq_nr)
+{
+        unsigned long mask, flags;
+        mask = get_irqmask(irq_nr);
+        local_irq_save(flags);
+        LEON3_BYPASS_STORE_PA(LEON_IMASK,
+                              (LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask)));
+        local_irq_restore(flags);
+
+}
+
+void __init leon_init_timers(irq_handler_t counter_fn)
+{
+        int irq;
+
+        leondebug_irq_disable = 0;
+        leon_debug_irqout = 0;
+        master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
+        dummy_master_l10_counter = 0;
+
+        if (leon3_gptimer_regs && leon3_irqctrl_regs) {
+                LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0);
+                LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld,
+                                      (((1000000 / 100) - 1)));
+                LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0);
+
+        } else {
+                printk(KERN_ERR "No Timer/irqctrl found\n");
+                BUG();
+        }
+
+        irq = request_irq(leon3_gptimer_irq,
+                          counter_fn,
+                          (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
+
+        if (irq) {
+                printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n",
+                       LEON_INTERRUPT_TIMER1);
+                prom_halt();
+        }
+
+        if (leon3_gptimer_regs) {
+                LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl,
+                                      LEON3_GPTIMER_EN |
+                                      LEON3_GPTIMER_RL |
+                                      LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+        }
+}
+
+void leon_clear_clock_irq(void)
+{
+}
+
+void leon_load_profile_irq(int cpu, unsigned int limit)
+{
+        BUG();
+}
+
+
+
+
+void __init leon_trans_init(struct device_node *dp)
+{
+        if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
+                struct property *p;
+                p = of_find_property(dp, "mid", (void *)0);
+                if (p) {
+                        int mid;
+                        dp->name = prom_early_alloc(5 + 1);
+                        memcpy(&mid, p->value, p->length);
+                        sprintf((char *)dp->name, "cpu%.2d", mid);
+                }
+        }
+}
+
+void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0;
+
+void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
+{
+        if (prom_amba_init &&
+            strcmp(dp->type, "ambapp") == 0 &&
+            strcmp(dp->name, "ambapp0") == 0) {
+                prom_amba_init(dp, nextp);
+        }
+}
+
+void __init leon_init_IRQ(void)
+{
+        sparc_init_timers = leon_init_timers;
+
+        BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM);
+        BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM);
+        BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM);
+        BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM);
+
+        BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
+                        BTFIXUPCALL_NORM);
+        BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
+                        BTFIXUPCALL_NOP);
+
+#ifdef CONFIG_SMP
+        BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
+        BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
+        BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
+#endif
+
+}
+
+void __init leon_init(void)
+{
+        prom_build_more = &leon_node_init;
+}