or1k: Implement context validate and context volatile clobber functions.

score/cpu/or1k: Add two new assembly functions: _CPU_Context_validate
and _CPU_Context_volatile_clobber; their implementation follows
corresponding ARM functions.

4 files changed, 225 insertions, 3 deletions

diff --git a/cpukit/score/cpu/or1k/Makefile.am b/cpukit/score/cpu/or1k/Makefile.am
index cb9685619d..b9e00d3634 100644
--- a/cpukit/score/cpu/or1k/Makefile.am
+++ b/cpukit/score/cpu/or1k/Makefile.am
@@ -24,6 +24,8 @@ libscorecpu_a_SOURCES =
 libscorecpu_a_SOURCES += cpu.c
 libscorecpu_a_SOURCES += or1k-context-switch.S
 libscorecpu_a_SOURCES += or1k-context-initialize.c
+libscorecpu_a_SOURCES += or1k-context-validate.S
+libscorecpu_a_SOURCES += or1k-context-volatile-clobber.S
 libscorecpu_a_SOURCES += or1k-exception-default.c
 libscorecpu_a_SOURCES += or1k-exception-frame-print.c
 libscorecpu_a_SOURCES += or1k-exception-handler-low.S
diff --git a/cpukit/score/cpu/or1k/or1k-context-validate.S b/cpukit/score/cpu/or1k/or1k-context-validate.S
new file mode 100644
index 0000000000..ec23dc33f2
--- /dev/null
+++ b/cpukit/score/cpu/or1k/or1k-context-validate.S
@@ -0,0 +1,185 @@
+/*
+ * COPYRIGHT (c) 2014 Hesham ALMatary <heshamelmatary@gmail.com>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/asm.h>
+#include <rtems/score/cpu.h>
+
+.section	.text
+
+PUBLIC(_CPU_Context_validate)
+SYM(_CPU_Context_validate):
+
+  l.addi r1, r1, -140
+
+  l.sw  8(r1), r2
+  l.sw  12(r1), r3
+  l.sw  16(r1), r4
+  l.sw  20(r1), r5
+  l.sw  24(r1), r6
+  l.sw  28(r1), r7
+  l.sw  32(r1), r8
+  l.sw  36(r1), r9
+  l.sw  40(r1), r10
+  l.sw  44(r1), r11
+  l.sw  48(r1), r12
+  l.sw  52(r1), r13
+  l.sw  56(r1), r14
+  l.sw  60(r1), r15
+  l.sw  64(r1), r16
+  l.sw  68(r1), r17
+  l.sw  72(r1), r18
+  l.sw  76(r1), r19
+  l.sw  80(r1), r20
+  l.sw  84(r1), r21
+  l.sw  88(r1), r22
+  l.sw  92(r1), r23
+  l.sw  96(r1), r24
+  l.sw  100(r1), r25
+  l.sw  104(r1), r26
+  l.sw  108(r1), r27
+  l.sw  112(r1), r28
+  l.sw  116(r1), r29
+  l.sw  120(r1), r30
+  l.sw  124(r1), r31
+
+  /* Fill */
+
+  /* r13 is used for temporary values */
+  l.add r13, r0, r0
+
+  /* r31 contains the stack pointer */
+  l.add r31, r1, r0
+
+.macro fill_register reg
+  l.addi	r13, r13, 1
+  l.addi	\reg, r13, 0
+.endm
+
+  fill_register	r2
+  fill_register	r3
+  fill_register	r4
+  fill_register	r5
+  fill_register	r6
+  fill_register	r7
+  fill_register	r8
+  fill_register	r9
+  fill_register	r10
+  fill_register	r11
+  fill_register	r12
+  fill_register	r13
+  fill_register	r14
+  fill_register	r15
+  fill_register	r16
+  fill_register	r17
+  fill_register	r18
+  fill_register	r19
+  fill_register	r20
+  fill_register	r21
+  fill_register	r22
+  fill_register	r23
+  fill_register	r24
+  fill_register	r25
+  fill_register	r26
+  fill_register	r27
+  fill_register	r28
+  fill_register	r29
+  fill_register	r30
+  fill_register	r31
+
+	/* Check */
+check:
+
+.macro check_register reg
+	l.addi r13, r13, 1
+	l.sfne \reg, r13
+	l.bf   restore
+	l.nop
+.endm
+
+	l.sfne r31, r1
+	l.bf restore
+	l.nop
+
+	l.addi r13, r0, 0
+
+	check_register	r2
+	check_register	r3
+	check_register	r4
+	check_register	r5
+	check_register	r6
+	check_register	r7
+	check_register	r8
+	check_register	r9
+	check_register	r10
+  check_register	r11
+  check_register	r12
+  check_register	r13
+  check_register	r14
+  check_register	r15
+  check_register	r16
+  check_register	r17
+  check_register	r18
+  check_register	r19
+  check_register	r20
+	check_register	r21
+	check_register	r22
+	check_register	r23
+	check_register	r24
+	check_register	r25
+	check_register	r26
+	check_register	r27
+	check_register	r28
+	check_register	r29
+	check_register	r30
+	check_register	r31
+
+	l.j check
+	l.nop
+
+/* Restore */
+restore:
+
+  l.lwz  r2,  8(r1)
+  l.lwz  r3,  12(r1)
+  l.lwz  r4,  16(r1)
+  l.lwz  r5,  20(r1)
+  l.lwz  r6,  24(r1)
+  l.lwz  r7,  28(r1)
+  l.lwz  r8,  32(r1)
+  l.lwz  r9,  36(r1)
+  l.lwz  r10, 40(r1)
+  l.lwz  r11, 44(r1)
+  l.lwz  r12, 48(r1)
+  l.lwz  r13, 52(r1)
+  l.lwz  r14, 56(r1)
+  l.lwz  r15, 60(r1)
+  l.lwz  r16, 64(r1)
+  l.lwz  r17, 68(r1)
+  l.lwz  r18, 72(r1)
+  l.lwz  r19, 76(r1)
+  l.lwz  r20, 80(r1)
+  l.lwz  r21, 84(r1)
+  l.lwz  r22, 88(r1)
+  l.lwz  r23, 92(r1)
+  l.lwz  r24, 96(r1)
+  l.lwz  r25, 100(r1)
+  l.lwz  r26, 104(r1)
+  l.lwz  r27, 108(r1)
+  l.lwz  r28, 112(r1)
+  l.lwz  r29, 116(r1)
+  l.lwz  r30, 120(r1)
+  l.lwz  r31, 124(r1)
+
+  l.addi r1, r1, 140
+
+  l.jr r9
+  l.nop
diff --git a/cpukit/score/cpu/or1k/or1k-context-volatile-clobber.S b/cpukit/score/cpu/or1k/or1k-context-volatile-clobber.S
new file mode 100644
index 0000000000..304b769649
--- /dev/null
+++ b/cpukit/score/cpu/or1k/or1k-context-volatile-clobber.S
@@ -0,0 +1,35 @@
+/*
+ * COPYRIGHT (c) 2014 Hesham ALMatary <heshamelmatary@gmail.com>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/asm.h>
+
+.section .text
+
+PUBLIC(_CPU_Context_volatile_clobber)
+SYM(_CPU_Context_volatile_clobber):
+
+.macro clobber_register reg
+  l.addi r0, r0, -1
+  l.addi  \reg, r0, 0
+.endm
+
+  clobber_register  r3
+  clobber_register  r4
+  clobber_register  r5
+  clobber_register  r6
+  clobber_register  r7
+  clobber_register  r8
+  clobber_register  r13
+  clobber_register  r31
+
+  l.jr  r9
+  l.nop
diff --git a/cpukit/score/cpu/or1k/preinstall.am b/cpukit/score/cpu/or1k/preinstall.am
index f4d7153055..01cd68fb96 100644
--- a/cpukit/score/cpu/or1k/preinstall.am
+++ b/cpukit/score/cpu/or1k/preinstall.am
@@ -5,14 +5,14 @@ $(srcdir)/preinstall.am: Makefile.am
 	$(AMPOLISH3) $(srcdir)/Makefile.am > $(srcdir)/preinstall.am
 endif
 
-PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
-
 all-am: $(PREINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
 
+PREINSTALL_DIRS =
+DISTCLEANFILES += $(PREINSTALL_DIRS)
+
 $(PROJECT_INCLUDE)/rtems/$(dirstamp):
 	@$(MKDIR_P) $(PROJECT_INCLUDE)/rtems
 	@: > $(PROJECT_INCLUDE)/rtems/$(dirstamp)