[PATCH] CRIS update: new subarchitecture v32

New CRIS sub architecture named v32.

From: Dave Jones <davej@redhat.com>

	Fix swapped kmalloc args

Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 120 insertions, 0 deletions

diff --git a/include/asm-cris/arch-v32/irq.h b/include/asm-cris/arch-v32/irq.h
new file mode 100644
index 0000000..d35aa81
--- /dev/null
+++ b/include/asm-cris/arch-v32/irq.h
@@ -0,0 +1,120 @@
+#ifndef _ASM_ARCH_IRQ_H
+#define _ASM_ARCH_IRQ_H
+
+#include <linux/config.h>
+#include "hwregs/intr_vect.h"
+
+/* Number of non-cpu interrupts. */
+#define NR_IRQS 0x50 /* Exceptions + IRQs */
+#define NR_REAL_IRQS 0x20 /* IRQs */
+#define FIRST_IRQ 0x31 /* Exception number for first IRQ */
+
+#ifndef __ASSEMBLY__
+/* Global IRQ vector. */
+typedef void (*irqvectptr)(void);
+
+struct etrax_interrupt_vector {
+	irqvectptr v[256];
+};
+
+extern struct etrax_interrupt_vector *etrax_irv;	/* head.S */
+
+void mask_irq(int irq);
+void unmask_irq(int irq);
+
+void set_exception_vector(int n, irqvectptr addr);
+
+/* Save registers so that they match pt_regs. */
+#define SAVE_ALL \
+	"subq 12,$sp\n\t"	\
+	"move $erp,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move $srp,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move $ccs,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move $spc,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move $mof,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move $srs,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move.d $acr,[$sp]\n\t"	\
+	"subq 14*4,$sp\n\t"	\
+	"movem $r13,[$sp]\n\t"	\
+	"subq 4,$sp\n\t"	\
+	"move.d $r10,[$sp]\n"
+
+#define STR2(x) #x
+#define STR(x) STR2(x)
+
+#define IRQ_NAME2(nr) nr##_interrupt(void)
+#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
+
+/*
+ * The reason for setting the S-bit when debugging the kernel is that we want
+ * hardware breakpoints to remain active while we are in an exception handler.
+ * Note that we cannot simply copy S1, since we may come here from user-space,
+ * or any context where the S-bit wasn't set.
+ */
+#ifdef CONFIG_ETRAX_KGDB
+#define KGDB_FIXUP \
+	"move $ccs, $r10\n\t"		\
+	"or.d (1<<9), $r10\n\t"		\
+	"move $r10, $ccs\n\t"
+#else
+#define KGDB_FIXUP ""
+#endif
+
+/*
+ * Make sure the causing IRQ is blocked, then call do_IRQ. After that, unblock
+ * and jump to ret_from_intr which is found in entry.S.
+ *
+ * The reason for blocking the IRQ is to allow an sti() before the handler,
+ * which will acknowledge the interrupt, is run. The actual blocking is made
+ * by crisv32_do_IRQ.
+ */
+#define BUILD_IRQ(nr, mask)		\
+void IRQ_NAME(nr);			\
+__asm__ (				\
+	".text\n\t"			\
+	"IRQ" #nr "_interrupt:\n\t" 	\
+	SAVE_ALL			\
+	KGDB_FIXUP                      \
+	"move.d "#nr",$r10\n\t"		\
+	"move.d $sp,$r12\n\t"		\
+	"jsr crisv32_do_IRQ\n\t"       	\
+	"moveq 1, $r11\n\t"		\
+	"jump ret_from_intr\n\t"	\
+	"nop\n\t");
+/*
+ * This is subtle. The timer interrupt is crucial and it should not be disabled
+ * for too long. However, if it had been a normal interrupt as per BUILD_IRQ, it
+ * would have been BLOCK'ed, and then softirq's are run before we return here to
+ * UNBLOCK. If the softirq's take too much time to run, the timer irq won't run
+ * and the watchdog will kill us.
+ *
+ * Furthermore, if a lot of other irq's occur before we return here, the
+ * multiple_irq handler is run and it prioritizes the timer interrupt. However
+ * if we had BLOCK'edit here, we would not get the multiple_irq at all.
+ *
+ * The non-blocking here is based on the knowledge that the timer interrupt is
+ * registred as a fast interrupt (SA_INTERRUPT) so that we _know_ there will not
+ * be an sti() before the timer irq handler is run to acknowledge the interrupt.
+ */
+#define BUILD_TIMER_IRQ(nr, mask) 	\
+void IRQ_NAME(nr);			\
+__asm__ (				\
+	".text\n\t"			\
+	"IRQ" #nr "_interrupt:\n\t"	\
+	SAVE_ALL			\
+        KGDB_FIXUP                      \
+	"move.d "#nr",$r10\n\t"		\
+	"move.d $sp,$r12\n\t"		\
+	"jsr crisv32_do_IRQ\n\t"	\
+	"moveq 0,$r11\n\t"		\
+	"jump ret_from_intr\n\t"	\
+	"nop\n\t");
+
+#endif /* __ASSEMBLY__ */
+#endif /* _ASM_ARCH_IRQ_H */