nds32/lib: add generic funcs in NDS32 lib

Add Makefile, board.c, interrupts.c and bootm.c functions
to nds32 architecture.

Signed-off-by: Macpaul Lin <macpaul@andestech.com>

1 files changed, 129 insertions, 0 deletions

diff --git a/arch/nds32/lib/interrupts.c b/arch/nds32/lib/interrupts.c
new file mode 100644
index 0000000000..974d52a1a1
--- /dev/null
+++ b/arch/nds32/lib/interrupts.c
@@ -0,0 +1,129 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.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 <asm/ptrace.h>
+#include <asm/system.h>
+#undef INTERRUPT_MODE
+
+static int int_flag;
+
+int irq_flags;		/* needed by asm-nds32/system.h */
+
+int GIE_STATUS(void)
+{
+	int ret;
+
+	__asm__ __volatile__ (
+		"mfsr	$p0, $psw\n\t"
+		"andi	%0, %0, 0x1\n\t"
+		: "=r" (ret)
+		:
+		: "memory"
+	);
+	return ret;
+}
+
+#ifdef CONFIG_USE_INTERRUPT
+
+/* enable interrupts */
+void enable_interrupts(void)
+{
+	local_irq_restore(int_flag);
+}
+
+/*
+ * disable interrupts
+ * Return TRUE if GIE is enabled before we disable it.
+ */
+int disable_interrupts(void)
+{
+
+	int gie_ori_status;
+
+	gie_ori_status = GIE_STATUS();
+
+	local_irq_save(int_flag);
+
+	return gie_ori_status;
+}
+#endif
+
+void bad_mode(void)
+{
+	panic("Resetting CPU ...\n");
+	reset_cpu(0);
+}
+
+void show_regs(struct pt_regs *regs)
+{
+	const char *processor_modes[] = {"USER", "SuperUser" , "HyperVisor"};
+
+	printf("\n");
+	printf("pc : [<%08lx>]	sp: [<%08lx>]\n"
+		"lp : %08lx  gp : %08lx  fp : %08lx\n",
+		regs->ipc, regs->sp, regs->lp, regs->gp, regs->fp);
+	printf("D1H: %08lx  D1L: %08lx  D0H: %08lx  D0L: %08lx\n",
+		regs->d1hi, regs->d1lo, regs->d0hi, regs->d0lo);
+	printf("r27: %08lx  r26: %08lx  r25: %08lx  r24: %08lx\n",
+		regs->r[27], regs->r[26], regs->r[25], regs->r[24]);
+	printf("r23: %08lx  r22: %08lx  r21: %08lx  r20: %08lx\n",
+		regs->r[23], regs->r[22], regs->r[21], regs->r[20]);
+	printf("r19: %08lx  r18: %08lx  r17: %08lx  r16: %08lx\n",
+		regs->r[19], regs->r[18], regs->r[17], regs->r[16]);
+	printf("r15: %08lx  r14: %08lx  r13: %08lx  r12: %08lx\n",
+		regs->r[15], regs->r[14], regs->r[13], regs->r[12]);
+	printf("r11: %08lx  r10: %08lx  r9 : %08lx  r8 : %08lx\n",
+		regs->r[11], regs->r[10], regs->r[9], regs->r[8]);
+	printf("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
+		regs->r[7], regs->r[6], regs->r[5], regs->r[4]);
+	printf("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
+		regs->r[3], regs->r[2], regs->r[1], regs->r[0]);
+	printf("  Interrupts %s  Mode %s\n",
+		interrupts_enabled(regs) ? "on" : "off",
+		processor_modes[processor_mode(regs)]);
+}
+
+void do_interruption(struct pt_regs *pt_regs, int EVIC_num)
+{
+	const char *interruption_type[] = {
+		"Reset",
+		"TLB Fill",
+		"TLB Not Present",
+		"TLB Misc",
+		"VLPT Miss",
+		"Cache Parity Error",
+		"Debug",
+		"General Exception",
+		"External Interrupt"
+	};
+
+	printf("%s\n", interruption_type[EVIC_num]);
+	show_regs(pt_regs);
+	bad_mode();
+}