Modified gen_mk_src script for asm file, moved asm .S file in relative cpu hw section

[bertos.git] / bertos / cpu / arm / hw / switch_arm.S

diff --git a/bertos/cpu/arm/hw/switch_arm.S b/bertos/cpu/arm/hw/switch_arm.S
new file mode 100644 (file)
index 0000000..531b18a
--- /dev/null
+++ b/bertos/cpu/arm/hw/switch_arm.S
@@ -0,0 +1,67 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief ARM context switch
+ *
+ * \version $Id: proc.c 18271 2007-10-11 14:51:31Z batt $
+ *
+ * \author Stefano Fedrigo <aleph@develer.com>
+ * \author Francesco Sacchi <batt@develer.com>
+ */
+
+
+/*
+ * NOTE: At each change of this function affecting proc.c
+ * (i.e. arguments, data stored in the stack) bump up version
+ * number in asm_switch_version().
+ */
+
+/* void asm_switch_context(void **new_sp, void **save_sp) */
+.globl asm_switch_context
+asm_switch_context:
+       mrs     r2, cpsr               /* Save status. */
+       stmfd   sp!, {r2, r4-r11, lr}  /* Save registers. */
+
+       str     sp, [r1]               /* Save old stack pointer. */
+       ldr     sp, [r0]               /* Load new stack pointer */
+
+       ldmfd   sp!, {r2, r4-r11, lr}  /* Load new registers. */
+       msr     cpsr, r2               /* restore flags reg. */
+
+       mov     pc, lr
+
+
+/* int asm_switch_version(void) */
+.globl asm_switch_version
+asm_switch_version:
+       mov     r0, #1
+       mov     pc, lr