[PATCH 1/2] cpukit: Add Epiphany architecture port
Hesham ALMatary
heshamelmatary at gmail.com
Fri May 8 02:11:58 UTC 2015
---
cpukit/configure.ac | 1 +
cpukit/librpc/src/xdr/xdr_float.c | 1 +
cpukit/score/cpu/Makefile.am | 1 +
cpukit/score/cpu/epiphany/Makefile.am | 33 +
cpukit/score/cpu/epiphany/cpu.c | 99 ++
.../cpu/epiphany/epiphany-context-initialize.c | 49 +
.../score/cpu/epiphany/epiphany-context-switch.S | 197 ++++
.../cpu/epiphany/epiphany-exception-handler.S | 290 +++++
cpukit/score/cpu/epiphany/preinstall.am | 53 +
cpukit/score/cpu/epiphany/rtems/asm.h | 97 ++
cpukit/score/cpu/epiphany/rtems/score/cpu.h | 1171 ++++++++++++++++++++
cpukit/score/cpu/epiphany/rtems/score/cpu_asm.h | 74 ++
cpukit/score/cpu/epiphany/rtems/score/cpuatomic.h | 14 +
.../cpu/epiphany/rtems/score/epiphany-utility.h | 180 +++
cpukit/score/cpu/epiphany/rtems/score/epiphany.h | 50 +
cpukit/score/cpu/epiphany/rtems/score/types.h | 55 +
16 files changed, 2365 insertions(+)
create mode 100644 cpukit/score/cpu/epiphany/Makefile.am
create mode 100644 cpukit/score/cpu/epiphany/cpu.c
create mode 100644 cpukit/score/cpu/epiphany/epiphany-context-initialize.c
create mode 100644 cpukit/score/cpu/epiphany/epiphany-context-switch.S
create mode 100644 cpukit/score/cpu/epiphany/epiphany-exception-handler.S
create mode 100644 cpukit/score/cpu/epiphany/preinstall.am
create mode 100644 cpukit/score/cpu/epiphany/rtems/asm.h
create mode 100644 cpukit/score/cpu/epiphany/rtems/score/cpu.h
create mode 100644 cpukit/score/cpu/epiphany/rtems/score/cpu_asm.h
create mode 100644 cpukit/score/cpu/epiphany/rtems/score/cpuatomic.h
create mode 100644 cpukit/score/cpu/epiphany/rtems/score/epiphany-utility.h
create mode 100644 cpukit/score/cpu/epiphany/rtems/score/epiphany.h
create mode 100644 cpukit/score/cpu/epiphany/rtems/score/types.h
diff --git a/cpukit/configure.ac b/cpukit/configure.ac
index 2b432f6..46942c9 100644
--- a/cpukit/configure.ac
+++ b/cpukit/configure.ac
@@ -453,6 +453,7 @@ score/cpu/Makefile
score/cpu/arm/Makefile
score/cpu/bfin/Makefile
score/cpu/avr/Makefile
+score/cpu/epiphany/Makefile
score/cpu/h8300/Makefile
score/cpu/i386/Makefile
score/cpu/lm32/Makefile
diff --git a/cpukit/librpc/src/xdr/xdr_float.c b/cpukit/librpc/src/xdr/xdr_float.c
index 925b294..ac8c46d 100644
--- a/cpukit/librpc/src/xdr/xdr_float.c
+++ b/cpukit/librpc/src/xdr/xdr_float.c
@@ -61,6 +61,7 @@ static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_float.c,v 1.7 1999/08/28 00
#if defined(__alpha__) || \
defined(_AM29K) || \
defined(__arm__) || \
+ defined(__epiphany__) || defined(__EPIPHANY__) || \
defined(__H8300__) || defined(__h8300__) || \
defined(__hppa__) || \
defined(__i386__) || \
diff --git a/cpukit/score/cpu/Makefile.am b/cpukit/score/cpu/Makefile.am
index 69abcd6..7279d38 100644
--- a/cpukit/score/cpu/Makefile.am
+++ b/cpukit/score/cpu/Makefile.am
@@ -4,6 +4,7 @@ DIST_SUBDIRS =
DIST_SUBDIRS += arm
DIST_SUBDIRS += avr
DIST_SUBDIRS += bfin
+DIST_SUBDIRS += epiphany
DIST_SUBDIRS += h8300
DIST_SUBDIRS += i386
DIST_SUBDIRS += lm32
diff --git a/cpukit/score/cpu/epiphany/Makefile.am b/cpukit/score/cpu/epiphany/Makefile.am
new file mode 100644
index 0000000..0df3376
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/Makefile.am
@@ -0,0 +1,33 @@
+include $(top_srcdir)/automake/compile.am
+
+CLEANFILES =
+DISTCLEANFILES =
+
+include_rtemsdir = $(includedir)/rtems
+
+include_rtems_HEADERS = rtems/asm.h
+
+include_rtems_scoredir = $(includedir)/rtems/score
+
+include_rtems_score_HEADERS =
+include_rtems_score_HEADERS += rtems/score/cpu.h
+include_rtems_score_HEADERS += rtems/score/cpuatomic.h
+include_rtems_score_HEADERS += rtems/score/cpu_asm.h
+include_rtems_score_HEADERS += rtems/score/types.h
+include_rtems_score_HEADERS += rtems/score/epiphany.h
+include_rtems_score_HEADERS += rtems/score/epiphany-utility.h
+
+noinst_LIBRARIES = libscorecpu.a
+
+libscorecpu_a_SOURCES = cpu.c
+libscorecpu_a_SOURCES += epiphany-exception-handler.S
+libscorecpu_a_SOURCES += epiphany-context-switch.S
+libscorecpu_a_SOURCES += epiphany-context-initialize.c
+
+
+libscorecpu_a_CPPFLAGS = $(AM_CPPFLAGS)
+
+all-local: $(PREINSTALL_FILES)
+
+include $(srcdir)/preinstall.am
+include $(top_srcdir)/automake/local.am
diff --git a/cpukit/score/cpu/epiphany/cpu.c b/cpukit/score/cpu/epiphany/cpu.c
new file mode 100644
index 0000000..0558dbb
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/cpu.c
@@ -0,0 +1,99 @@
+/*
+ * Epiphany CPU Dependent Source
+ *
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * COPYRIGHT (c) 1989-1999.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/wkspace.h>
+#include <bsp/linker-symbols.h>
+#include <rtems/score/cpu.h>
+
+void _init(void);
+void _fini(void);
+
+void _init(void)
+{
+ /* Do nothing */
+}
+
+void _fini(void)
+{
+ /* Do nothing */
+}
+
+void _CPU_Exception_frame_print (const CPU_Exception_frame *ctx)
+{
+ /* Do nothing */
+}
+/**
+ * @brief Performs processor dependent initialization.
+ */
+void _CPU_Initialize(void)
+{
+ /* Do nothing */
+}
+
+void _CPU_ISR_Set_level(uint32_t level)
+{
+ /* Do nothing */
+}
+
+uint32_t _CPU_ISR_Get_level( void )
+{
+ /* Do nothing */
+ return 0;
+}
+
+void _CPU_ISR_install_raw_handler(
+ uint32_t vector,
+ proc_ptr new_handler,
+ proc_ptr *old_handler
+)
+{
+ /* Do nothing */
+}
+
+void _CPU_ISR_install_vector(
+ uint32_t vector,
+ proc_ptr new_handler,
+ proc_ptr *old_handler
+)
+{
+ /* Do nothing */
+}
+
+void _CPU_Install_interrupt_stack( void )
+{
+ /* Do nothing */
+}
+
+CPU_Counter_ticks _CPU_Counter_read( void )
+{
+ static CPU_Counter_ticks counter;
+
+ CPU_Counter_ticks snapshot;
+
+ snapshot = counter;
+ counter = snapshot + 1;
+
+ return snapshot;
+}
+
+void *_CPU_Thread_Idle_body( uintptr_t ignored )
+{
+ do {
+ asm volatile ("idle");
+ } while (1);
+ return (void *) 0;
+}
diff --git a/cpukit/score/cpu/epiphany/epiphany-context-initialize.c b/cpukit/score/cpu/epiphany/epiphany-context-initialize.c
new file mode 100644
index 0000000..f92c46e
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/epiphany-context-initialize.c
@@ -0,0 +1,49 @@
+/*
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * COPYRIGHT (c) 1989-2006
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * 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 <string.h>
+
+#include <rtems/score/cpu.h>
+#include <rtems/score/interr.h>
+
+void _CPU_Context_Initialize(
+ Context_Control *context,
+ void *stack_area_begin,
+ size_t stack_area_size,
+ uint32_t new_level,
+ void (*entry_point)( void ),
+ bool is_fp,
+ void *tls_area
+)
+{
+ uint32_t stack = ((uint32_t) stack_area_begin);
+ uint32_t sr, config, iret;
+
+ /* Account for red-zone */
+ uint32_t stack_high = stack + stack_area_size - 128;
+
+ asm volatile ("movfs %0, status \n" : "=r" (sr):);
+ asm volatile ("movfs %0, config \n" : "=r" (config):);
+ asm volatile ("movfs %0, iret \n" : "=r" (iret):);
+
+ memset(context, 0, sizeof(*context));
+
+ context->r[13] = stack_high;
+ context->r[11] = stack_high;
+ context->r[14] = (uint32_t) entry_point;
+ context->status = sr;
+ context->iret = iret;
+}
diff --git a/cpukit/score/cpu/epiphany/epiphany-context-switch.S b/cpukit/score/cpu/epiphany/epiphany-context-switch.S
new file mode 100644
index 0000000..3bb3bf3
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/epiphany-context-switch.S
@@ -0,0 +1,197 @@
+/*
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * 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,"ax";
+.align 4
+
+PUBLIC(_CPU_Context_switch)
+PUBLIC(_CPU_Context_restore)
+PUBLIC(_CPU_Context_restore_fp)
+PUBLIC(_CPU_Context_save_fp)
+PUBLIC(restore)
+
+SYM(_CPU_Context_switch):
+ /* Disable interrupts and store all registers */
+ gid
+
+ str r0, [r0]
+ str r1, [r0,1]
+ str r2, [r0,2]
+ str r3, [r0,3]
+ str r4, [r0,4]
+ str r5, [r0,5]
+ str r6, [r0,6]
+ str r7, [r0,7]
+ str r8, [r0,8]
+ str r9, [r0,9]
+ str r10, [r0,10]
+ str fp, [r0,11]
+ str r12, [r0,12]
+ str sp, [r0,13]
+ str lr, [r0,14]
+ str r15, [r0,15]
+ str r16, [r0,16]
+ str r17, [r0,17]
+ str r18, [r0,18]
+ str r19, [r0,19]
+ str r20, [r0,20]
+ str r21, [r0,21]
+ str r22, [r0,22]
+ str r23, [r0,23]
+ str r24, [r0,24]
+ str r25, [r0,25]
+ str r26, [r0,26]
+ str r27, [r0,27]
+ str r28, [r0,28]
+ str r29, [r0,29]
+ str r30, [r0,30]
+ str r31, [r0,31]
+ str r32, [r0,32]
+ str r33, [r0,33]
+ str r34, [r0,34]
+ str r35, [r0,35]
+ str r36, [r0,36]
+ str r37, [r0,37]
+ str r38, [r0,38]
+ str r39, [r0,39]
+ str r40, [r0,40]
+ str r41, [r0,41]
+ str r42, [r0,42]
+ str r43, [r0,43]
+ str r44, [r0,44]
+ str r45, [r0,45]
+ str r46, [r0,46]
+ str r47, [r0,47]
+ str r48, [r0,48]
+ str r49, [r0,49]
+ str r50, [r0,50]
+ str r51, [r0,51]
+ str r52, [r0,52]
+ str r53, [r0,53]
+ str r54, [r0,54]
+ str r55, [r0,55]
+ str r56, [r0,56]
+ str r57, [r0,57]
+ str r58, [r0,58]
+ str r59, [r0,59]
+ str r60, [r0,60]
+ str r61, [r0,61]
+ str r62, [r0,62]
+ str r63, [r0,63]
+
+ /* Store status register */
+ movfs r27, status
+ str r27, [r0,64]
+
+ /* Store config register */
+ movfs r27, config
+ str r27, [r0,65]
+
+ /* Store interrupt return address register */
+ movfs r27, iret
+ str r27, [r0,66]
+
+SYM(restore):
+
+ /* r1 contains buffer address, skip it */
+ ldr r2, [r1,2]
+ ldr r3, [r1,3]
+ ldr r4, [r1,4]
+ ldr r5, [r1,5]
+ ldr r6, [r1,6]
+ ldr r7, [r1,7]
+ ldr r8, [r1,8]
+ ldr r9, [r1,9]
+ ldr r10, [r1,10]
+ ldr fp, [r1,11]
+ ldr r12, [r1,12]
+ ldr sp, [r1,13]
+ ldr lr, [r1,14]
+ ldr r15, [r1,15]
+ ldr r16, [r1,16]
+ ldr r17, [r1,17]
+ ldr r18, [r1,18]
+ ldr r19, [r1,19]
+ ldr r20, [r1,20]
+ ldr r21, [r1,21]
+ ldr r22, [r1,22]
+ ldr r23, [r1,23]
+ ldr r24, [r1,24]
+ ldr r25, [r1,25]
+ ldr r26, [r1,26]
+ ldr r27, [r1,27]
+ ldr r32, [r1,32]
+ ldr r33, [r1,33]
+ ldr r34, [r1,34]
+ ldr r35, [r1,35]
+ ldr r36, [r1,36]
+ ldr r37, [r1,37]
+ ldr r38, [r1,38]
+ ldr r39, [r1,39]
+ ldr r40, [r1,40]
+ ldr r41, [r1,41]
+ ldr r42, [r1,42]
+ ldr r43, [r1,43]
+ ldr r44, [r1,44]
+ ldr r45, [r1,45]
+ ldr r46, [r1,46]
+ ldr r47, [r1,47]
+ ldr r48, [r1,48]
+ ldr r49, [r1,49]
+ ldr r50, [r1,50]
+ ldr r51, [r1,51]
+ ldr r52, [r1,52]
+ ldr r53, [r1,53]
+ ldr r54, [r1,54]
+ ldr r55, [r1,55]
+ ldr r56, [r1,56]
+ ldr r57, [r1,57]
+ ldr r58, [r1,58]
+ ldr r59, [r1,59]
+ ldr r60, [r1,60]
+ ldr r61, [r1,61]
+ ldr r62, [r1,62]
+ ldr r63, [r1,63]
+
+ /* Load status register */
+ ldr r0, [r1,64]
+ movts status, r0
+
+ /* Load config register */
+ ldr r0, [r1,65]
+ movts config, r0
+
+ /* Load interrupt return address register */
+ ldr r0,[r1,66]
+ movts iret, r0
+
+ ldr r0,[r1]
+ ldr r1,[r1,1]
+
+ /* Enable interrupts and return */
+ gie
+ jr lr
+
+SYM(_CPU_Context_restore):
+ mov r1, r0
+ b _restore
+ nop
+
+/* No FP support for Epiphany yet */
+SYM(_CPU_Context_restore_fp):
+ nop
+
+ SYM(_CPU_Context_save_fp):
+ nop
diff --git a/cpukit/score/cpu/epiphany/epiphany-exception-handler.S b/cpukit/score/cpu/epiphany/epiphany-exception-handler.S
new file mode 100644
index 0000000..169329f
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/epiphany-exception-handler.S
@@ -0,0 +1,290 @@
+/**
+ * @file
+ *
+ * @ingroup ScoreCPU
+ *
+ * @brief Epiphany exception support implementation.
+ */
+
+/*
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * 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/score/cpu.h>
+
+#include <rtems/asm.h>
+#include <rtems/score/percpu.h>
+
+.extern _bsp_start_vector_table_begin
+.extern __Thread_Dispatch
+
+.section .text, "ax"
+.align 4
+.global _ISR_Handler;
+.type _ISR_Handler, %function;
+_ISR_Handler:
+ /* Reserve space for CPU_Exception_frame */
+ add sp, sp, #-280
+
+ str r0,[sp]
+ str r1,[sp,1]
+
+ str r2,[sp,2]
+
+ /* Save config register */
+ movfs r1,config
+ str r1, [sp,65]
+
+ str r3, [sp,3]
+ str r4, [sp,4]
+ str r5, [sp,5]
+ str r6, [sp,6]
+ str r7, [sp,7]
+ str r8, [sp,8]
+ str r9, [sp,9]
+ str r10, [sp,10]
+ str fp, [sp,11]
+ str r12, [sp,12]
+ str lr, [sp,14]
+ str r15, [sp,15]
+ str r16, [sp,16]
+ str r17, [sp,17]
+ str r18, [sp,18]
+ str r19, [sp,19]
+ str r20, [sp,20]
+ str r21, [sp,21]
+ str r22, [sp,22]
+ str r23, [sp,23]
+ str r24, [sp,24]
+ str r25, [sp,25]
+ str r26, [sp,26]
+ str r27, [sp,27]
+ str r28, [sp,28]
+ str r29, [sp,29]
+ str r30, [sp,30]
+ str r31, [sp,31]
+ str r32, [sp,32]
+ str r33, [sp,33]
+ str r34, [sp,34]
+ str r35, [sp,35]
+ str r36, [sp,36]
+ str r37, [sp,37]
+ str r38, [sp,38]
+ str r39, [sp,39]
+ str r40, [sp,40]
+ str r41, [sp,41]
+ str r42, [sp,42]
+ str r43, [sp,43]
+ str r44, [sp,44]
+ str r45, [sp,45]
+ str r46, [sp,46]
+ str r47, [sp,47]
+ str r48, [sp,48]
+ str r49, [sp,49]
+ str r50, [sp,50]
+ str r51, [sp,51]
+ str r52, [sp,52]
+ str r53, [sp,53]
+ str r54, [sp,54]
+ str r55, [sp,55]
+ str r56, [sp,56]
+ str r57, [sp,57]
+ str r58, [sp,58]
+ str r59, [sp,59]
+ str r60, [sp,60]
+ str r61, [sp,61]
+ str r62, [sp,62]
+ str r63, [sp,63]
+
+ /* Save status register */
+ movfs r1,status
+ str r1, [sp,64]
+
+ /* Save interrupt return address register */
+ movfs r1,iret
+ str r1, [sp,66]
+
+ /* Save interrupted task stack pointer */
+ add r1, sp, #288
+ str r1,[sp,13]
+
+ mov r18, %low(__Per_CPU_Information)
+ movt r18, %high(__Per_CPU_Information)
+
+ add r6, r18, #(PER_CPU_ISR_NEST_LEVEL)
+ add r8, r18, #(PER_CPU_THREAD_DISPATCH_DISABLE_LEVEL)
+
+ /* Increment nesting level and disable thread dispatch */
+ ldr r5, [r6]
+ ldr r7, [r8]
+ add r5, r5, #1
+ add r7, r7, #1
+ str r5, [r6]
+ str r7, [r8]
+
+ /* Keep sp (Exception frame address) in r32 - Callee saved */
+ mov r32, sp
+
+ /* Keep __Per_CPU_Information address in r33 - Callee saved */
+ mov r33, r18
+
+ /* Call the exception handler from vector table.
+ * First function arg for C handler is vector number,
+ * and the second is a pointer to exception frame.
+ */
+ mov r0, r62
+ mov r1, sp
+
+ mov r27, r62
+ lsl r27, r27, #2
+ mov r26, %low(_bsp_start_vector_table_begin)
+ movt r15, #0
+ add r27, r27, r26
+ ldr r27, [r27]
+
+ /* Do not switch stacks if we are in a nested interrupt. At
+ * this point r5 should be holding ISR_NEST_LEVEL value.
+ */
+ sub r37, r5, #1
+ bgtu jump_to_c_handler
+
+ /* Switch to RTEMS dedicated interrupt stack */
+ add sp, r18, #(PER_CPU_INTERRUPT_STACK_HIGH)
+ ldr sp, [sp]
+
+jump_to_c_handler:
+ jalr r27
+
+ /* Switch back to the interrupted task stack */
+ mov sp, r32
+
+ /* Get the address of __Per_CPU_Information */
+ mov r18, r33
+
+ /* Decrement nesting level and enable multitasking */
+ add r6, r18, #(PER_CPU_ISR_NEST_LEVEL)
+ add r8, r18, #(PER_CPU_THREAD_DISPATCH_DISABLE_LEVEL)
+
+ ldr r5, [r6]
+ ldr r7, [r8]
+ sub r5, r5, #1
+ sub r7, r7, #1
+ str r5, [r6]
+ str r7, [r8]
+
+ /* Check if _ISR_Nest_level > 0 */
+ sub r37, r5, #0
+ bgtu exception_frame_restore
+
+ /* Check if _Thread_Dispatch_disable_level > 0 */
+ sub r37, r7, #0
+ bgtu exception_frame_restore
+
+ /* Check if dispatch needed */
+ add r31, r18, #(PER_CPU_DISPATCH_NEEDED)
+ ldr r31, [r31]
+
+ sub r35, r31, #0
+ beq exception_frame_restore
+
+ mov r35, %low(__Thread_Dispatch)
+ movt r35, %high(__Thread_Dispatch)
+ jalr r35
+
+exception_frame_restore:
+
+ ldr r1, [sp,1]
+ ldr r3, [sp,3]
+ ldr r4, [sp,4]
+ ldr r5, [sp,5]
+ ldr r6, [sp,6]
+ ldr r7, [sp,7]
+ ldr r8, [sp,8]
+ ldr r9, [sp,9]
+ ldr r10, [sp,10]
+ ldr fp, [sp,11]
+ ldr r12, [sp,12]
+ ldr lr, [sp,14]
+ ldr r15, [sp,15]
+ ldr r16, [sp,16]
+ ldr r17, [sp,17]
+ ldr r18, [sp,18]
+ ldr r19, [sp,19]
+ ldr r20, [sp,20]
+ ldr r21, [sp,21]
+ ldr r22, [sp,22]
+ ldr r23, [sp,23]
+ ldr r24, [sp,24]
+ ldr r25, [sp,25]
+ ldr r26, [sp,26]
+ ldr r27, [sp,27]
+ ldr r28, [sp,28]
+ ldr r29, [sp,29]
+ ldr r30, [sp,30]
+ ldr r31, [sp,31]
+ ldr r32, [sp,32]
+ ldr r34, [sp,34]
+ ldr r36, [sp,36]
+ ldr r38, [sp,38]
+ ldr r39, [sp,39]
+ ldr r40, [sp,40]
+ ldr r41, [sp,41]
+ ldr r42, [sp,42]
+ ldr r43, [sp,43]
+ ldr r44, [sp,44]
+ ldr r45, [sp,45]
+ ldr r46, [sp,46]
+ ldr r47, [sp,47]
+ ldr r48, [sp,48]
+ ldr r49, [sp,49]
+ ldr r50, [sp,50]
+ ldr r51, [sp,51]
+ ldr r52, [sp,52]
+ ldr r53, [sp,53]
+ ldr r54, [sp,54]
+ ldr r55, [sp,55]
+ ldr r56, [sp,56]
+ ldr r57, [sp,57]
+ ldr r58, [sp,58]
+ ldr r59, [sp,59]
+ ldr r60, [sp,60]
+ ldr r61, [sp,61]
+ ldr r62, [sp,62]
+ ldr r63, [sp,63]
+
+ /* Restore status register */
+ ldr r0,[sp,64]
+ movts status, r0
+
+ /* Restore config register */
+ ldr r0, [sp,65]
+ movts config, r0
+
+ /* Restore interrupt return address register */
+ ldr r0, [sp,66]
+ movts iret, r0
+
+ /* Now buffer address held on r0 can be overwritten */
+ ldr r0,[sp]
+
+ ldr r2,[sp,2]
+
+ /* Unwind exception frame */
+ add sp, sp, #280
+
+ ldr r62, [sp, #4]
+ ldr r63, [sp, #8]
+ add sp, sp, #8
+
+ /* return from interrupt */
+ rti
diff --git a/cpukit/score/cpu/epiphany/preinstall.am b/cpukit/score/cpu/epiphany/preinstall.am
new file mode 100644
index 0000000..0250d12
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/preinstall.am
@@ -0,0 +1,52 @@
+## Automatically generated by ampolish3 - Do not edit
+
+if AMPOLISH3
+$(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 += $(PREINSTALL_FILES)
+
+$(PROJECT_INCLUDE)/rtems/$(dirstamp):
+ @$(MKDIR_P) $(PROJECT_INCLUDE)/rtems
+ @: > $(PROJECT_INCLUDE)/rtems/$(dirstamp)
+PREINSTALL_DIRS += $(PROJECT_INCLUDE)/rtems/$(dirstamp)
+
+$(PROJECT_INCLUDE)/rtems/asm.h: rtems/asm.h $(PROJECT_INCLUDE)/rtems/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/asm.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/asm.h
+
+$(PROJECT_INCLUDE)/rtems/score/$(dirstamp):
+ @$(MKDIR_P) $(PROJECT_INCLUDE)/rtems/score
+ @: > $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+PREINSTALL_DIRS += $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+
+$(PROJECT_INCLUDE)/rtems/score/cpu.h: rtems/score/cpu.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/cpu.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/cpu.h
+
+$(PROJECT_INCLUDE)/rtems/score/cpuatomic.h: rtems/score/cpuatomic.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/cpuatomic.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/cpuatomic.h
+
+$(PROJECT_INCLUDE)/rtems/score/cpu_asm.h: rtems/score/cpu_asm.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/cpu_asm.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/cpu_asm.h
+
+$(PROJECT_INCLUDE)/rtems/score/types.h: rtems/score/types.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/types.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/types.h
+
+$(PROJECT_INCLUDE)/rtems/score/epiphany.h: rtems/score/epiphany.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/epiphany.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/epiphany.h
+
+$(PROJECT_INCLUDE)/rtems/score/epiphany-utility.h: rtems/score/epiphany-utility.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/epiphany-utility.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/epiphany-utility.h
diff --git a/cpukit/score/cpu/epiphany/rtems/asm.h b/cpukit/score/cpu/epiphany/rtems/asm.h
new file mode 100644
index 0000000..4ded5d9
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/asm.h
@@ -0,0 +1,97 @@
+/**
+ * @file rtems/asm.h
+ *
+ * This include file attempts to address the problems
+ * caused by incompatible flavors of assemblers and
+ * toolsets. It primarily addresses variations in the
+ * use of leading underscores on symbols and the requirement
+ * that register names be preceded by a %.
+ */
+
+/*
+ * NOTE: The spacing in the use of these macros
+ * is critical to them working as advertised.
+ *
+ * COPYRIGHT:
+ *
+ * This file is based on similar code found in newlib available
+ * from ftp.cygnus.com. The file which was used had no copyright
+ * notice. This file is freely distributable as long as the source
+ * of the file is noted. This file is:
+ *
+ * COPYRIGHT (c) 1994-1997.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ */
+
+#ifndef __EPIPHANY_ASM_H
+#define __EPIPHANY_ASM_H
+
+/*
+ * Indicate we are in an assembly file and get the basic CPU definitions.
+ */
+
+#ifndef ASM
+#define ASM
+#endif
+#include <rtems/score/cpuopts.h>
+#include <rtems/score/epiphany.h>
+
+/*
+ * Recent versions of GNU cpp define variables which indicate the
+ * need for underscores and percents. If not using GNU cpp or
+ * the version does not support this, then you will obviously
+ * have to define these as appropriate.
+ */
+
+#ifndef __USER_LABEL_PREFIX__
+#define __USER_LABEL_PREFIX__ _
+#endif
+
+#ifndef __REGISTER_PREFIX__
+#define __REGISTER_PREFIX__
+#endif
+
+/* ANSI concatenation macros. */
+
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+/* Use the right prefix for global labels. */
+
+#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+
+/* Use the right prefix for registers. */
+
+#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
+
+/*
+ * define macros for all of the registers on this CPU
+ *
+ * EXAMPLE: #define d0 REG (d0)
+ */
+
+/*
+ * Define macros to handle section beginning and ends.
+ */
+#define BEGIN_CODE_DCL .text
+#define END_CODE_DCL
+#define BEGIN_DATA_DCL .data
+#define END_DATA_DCL
+#define BEGIN_CODE .text
+#define END_CODE
+#define BEGIN_DATA
+#define END_DATA
+#define BEGIN_BSS
+#define END_BSS
+#define END
+
+/*
+ * Following must be tailor for a particular flavor of the C compiler.
+ * They may need to put underscores in front of the symbols.
+ */
+
+#define PUBLIC(sym) .global SYM (sym)
+#define EXTERN(sym) .global SYM (sym)
+
+#endif
diff --git a/cpukit/score/cpu/epiphany/rtems/score/cpu.h b/cpukit/score/cpu/epiphany/rtems/score/cpu.h
new file mode 100644
index 0000000..eb29b2a
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/score/cpu.h
@@ -0,0 +1,1171 @@
+/**
+ * @file rtems/score/cpu.h
+ */
+
+/*
+ * This include file contains macros pertaining to the Opencores
+ * Epiphany processor family.
+ *
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * COPYRIGHT (c) 1989-1999.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ * This file adapted from no_cpu example of the RTEMS distribution.
+ * The body has been modified for the Opencores epiphany implementation by
+ * Chris Ziomkowski. <chris at asics.ws>
+ *
+ */
+
+#ifndef _EPIPHANY_CPU_H
+#define _EPIPHANY_CPU_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rtems/score/epiphany.h> /* pick up machine definitions */
+#include <rtems/score/types.h>
+#ifndef ASM
+#include <rtems/bspIo.h>
+#include <stdint.h>
+#include <stdio.h> /* for printk */
+#endif
+
+/* conditional compilation parameters */
+
+/*
+ * Should the calls to _Thread_Enable_dispatch be inlined?
+ *
+ * If TRUE, then they are inlined.
+ * If FALSE, then a subroutine call is made.
+ *
+ * Basically this is an example of the classic trade-off of size
+ * versus speed. Inlining the call (TRUE) typically increases the
+ * size of RTEMS while speeding up the enabling of dispatching.
+ * [NOTE: In general, the _Thread_Dispatch_disable_level will
+ * only be 0 or 1 unless you are in an interrupt handler and that
+ * interrupt handler invokes the executive.] When not inlined
+ * something calls _Thread_Enable_dispatch which in turns calls
+ * _Thread_Dispatch. If the enable dispatch is inlined, then
+ * one subroutine call is avoided entirely.]
+ *
+ */
+
+#define CPU_INLINE_ENABLE_DISPATCH FALSE
+
+/*
+ * Should the body of the search loops in _Thread_queue_Enqueue_priority
+ * be unrolled one time? In unrolled each iteration of the loop examines
+ * two "nodes" on the chain being searched. Otherwise, only one node
+ * is examined per iteration.
+ *
+ * If TRUE, then the loops are unrolled.
+ * If FALSE, then the loops are not unrolled.
+ *
+ * The primary factor in making this decision is the cost of disabling
+ * and enabling interrupts (_ISR_Flash) versus the cost of rest of the
+ * body of the loop. On some CPUs, the flash is more expensive than
+ * one iteration of the loop body. In this case, it might be desirable
+ * to unroll the loop. It is important to note that on some CPUs, this
+ * code is the longest interrupt disable period in RTEMS. So it is
+ * necessary to strike a balance when setting this parameter.
+ *
+ */
+
+#define CPU_UNROLL_ENQUEUE_PRIORITY TRUE
+
+/*
+ * Does RTEMS manage a dedicated interrupt stack in software?
+ *
+ * If TRUE, then a stack is allocated in _ISR_Handler_initialization.
+ * If FALSE, nothing is done.
+ *
+ * If the CPU supports a dedicated interrupt stack in hardware,
+ * then it is generally the responsibility of the BSP to allocate it
+ * and set it up.
+ *
+ * If the CPU does not support a dedicated interrupt stack, then
+ * the porter has two options: (1) execute interrupts on the
+ * stack of the interrupted task, and (2) have RTEMS manage a dedicated
+ * interrupt stack.
+ *
+ * If this is TRUE, CPU_ALLOCATE_INTERRUPT_STACK should also be TRUE.
+ *
+ * Only one of CPU_HAS_SOFTWARE_INTERRUPT_STACK and
+ * CPU_HAS_HARDWARE_INTERRUPT_STACK should be set to TRUE. It is
+ * possible that both are FALSE for a particular CPU. Although it
+ * is unclear what that would imply about the interrupt processing
+ * procedure on that CPU.
+ *
+ * Currently, for epiphany port, _ISR_Handler is responsible for switching to
+ * RTEMS dedicated interrupt task.
+ *
+ */
+
+#define CPU_HAS_SOFTWARE_INTERRUPT_STACK TRUE
+
+/*
+ * Does this CPU have hardware support for a dedicated interrupt stack?
+ *
+ * If TRUE, then it must be installed during initialization.
+ * If FALSE, then no installation is performed.
+ *
+ * If this is TRUE, CPU_ALLOCATE_INTERRUPT_STACK should also be TRUE.
+ *
+ * Only one of CPU_HAS_SOFTWARE_INTERRUPT_STACK and
+ * CPU_HAS_HARDWARE_INTERRUPT_STACK should be set to TRUE. It is
+ * possible that both are FALSE for a particular CPU. Although it
+ * is unclear what that would imply about the interrupt processing
+ * procedure on that CPU.
+ *
+ */
+
+#define CPU_HAS_HARDWARE_INTERRUPT_STACK FALSE
+
+/*
+ * Does RTEMS allocate a dedicated interrupt stack in the Interrupt Manager?
+ *
+ * If TRUE, then the memory is allocated during initialization.
+ * If FALSE, then the memory is allocated during initialization.
+ *
+ * This should be TRUE is CPU_HAS_SOFTWARE_INTERRUPT_STACK is TRUE
+ * or CPU_INSTALL_HARDWARE_INTERRUPT_STACK is TRUE.
+ *
+ */
+
+#define CPU_ALLOCATE_INTERRUPT_STACK TRUE
+
+/*
+ * Does the RTEMS invoke the user's ISR with the vector number and
+ * a pointer to the saved interrupt frame (1) or just the vector
+ * number (0)?
+ *
+ */
+
+#define CPU_ISR_PASSES_FRAME_POINTER 1
+
+/*
+ * Does the CPU have hardware floating point?
+ *
+ * If TRUE, then the RTEMS_FLOATING_POINT task attribute is supported.
+ * If FALSE, then the RTEMS_FLOATING_POINT task attribute is ignored.
+ *
+ * If there is a FP coprocessor such as the i387 or mc68881, then
+ * the answer is TRUE.
+ *
+ * The macro name "epiphany_HAS_FPU" should be made CPU specific.
+ * It indicates whether or not this CPU model has FP support. For
+ * example, it would be possible to have an i386_nofp CPU model
+ * which set this to false to indicate that you have an i386 without
+ * an i387 and wish to leave floating point support out of RTEMS.
+ *
+ * The CPU_SOFTWARE_FP is used to indicate whether or not there
+ * is software implemented floating point that must be context
+ * switched. The determination of whether or not this applies
+ * is very tool specific and the state saved/restored is also
+ * compiler specific.
+ *
+ * epiphany Specific Information:
+ *
+ * At this time there are no implementations of Epiphany that are
+ * expected to implement floating point.
+ */
+
+#define CPU_HARDWARE_FP FALSE
+#define CPU_SOFTWARE_FP FALSE
+
+/*
+ * Are all tasks RTEMS_FLOATING_POINT tasks implicitly?
+ *
+ * If TRUE, then the RTEMS_FLOATING_POINT task attribute is assumed.
+ * If FALSE, then the RTEMS_FLOATING_POINT task attribute is followed.
+ *
+ * If CPU_HARDWARE_FP is FALSE, then this should be FALSE as well.
+ *
+ */
+
+#define CPU_ALL_TASKS_ARE_FP FALSE
+
+/*
+ * Should the IDLE task have a floating point context?
+ *
+ * If TRUE, then the IDLE task is created as a RTEMS_FLOATING_POINT task
+ * and it has a floating point context which is switched in and out.
+ * If FALSE, then the IDLE task does not have a floating point context.
+ *
+ * Setting this to TRUE negatively impacts the time required to preempt
+ * the IDLE task from an interrupt because the floating point context
+ * must be saved as part of the preemption.
+ *
+ */
+
+#define CPU_IDLE_TASK_IS_FP FALSE
+
+/*
+ * Should the saving of the floating point registers be deferred
+ * until a context switch is made to another different floating point
+ * task?
+ *
+ * If TRUE, then the floating point context will not be stored until
+ * necessary. It will remain in the floating point registers and not
+ * disturned until another floating point task is switched to.
+ *
+ * If FALSE, then the floating point context is saved when a floating
+ * point task is switched out and restored when the next floating point
+ * task is restored. The state of the floating point registers between
+ * those two operations is not specified.
+ *
+ * If the floating point context does NOT have to be saved as part of
+ * interrupt dispatching, then it should be safe to set this to TRUE.
+ *
+ * Setting this flag to TRUE results in using a different algorithm
+ * for deciding when to save and restore the floating point context.
+ * The deferred FP switch algorithm minimizes the number of times
+ * the FP context is saved and restored. The FP context is not saved
+ * until a context switch is made to another, different FP task.
+ * Thus in a system with only one FP task, the FP context will never
+ * be saved or restored.
+ *
+ */
+
+#define CPU_USE_DEFERRED_FP_SWITCH FALSE
+
+/*
+ * Does this port provide a CPU dependent IDLE task implementation?
+ *
+ * If TRUE, then the routine _CPU_Thread_Idle_body
+ * must be provided and is the default IDLE thread body instead of
+ * _CPU_Thread_Idle_body.
+ *
+ * If FALSE, then use the generic IDLE thread body if the BSP does
+ * not provide one.
+ *
+ * This is intended to allow for supporting processors which have
+ * a low power or idle mode. When the IDLE thread is executed, then
+ * the CPU can be powered down.
+ *
+ * The order of precedence for selecting the IDLE thread body is:
+ *
+ * 1. BSP provided
+ * 2. CPU dependent (if provided)
+ * 3. generic (if no BSP and no CPU dependent)
+ *
+ */
+
+#define CPU_PROVIDES_IDLE_THREAD_BODY TRUE
+
+/*
+ * Does the stack grow up (toward higher addresses) or down
+ * (toward lower addresses)?
+ *
+ * If TRUE, then the grows upward.
+ * If FALSE, then the grows toward smaller addresses.
+ *
+ */
+
+#define CPU_STACK_GROWS_UP FALSE
+
+/*
+ * The following is the variable attribute used to force alignment
+ * of critical RTEMS structures. On some processors it may make
+ * sense to have these aligned on tighter boundaries than
+ * the minimum requirements of the compiler in order to have as
+ * much of the critical data area as possible in a cache line.
+ *
+ * The placement of this macro in the declaration of the variables
+ * is based on the syntactically requirements of the GNU C
+ * "__attribute__" extension. For example with GNU C, use
+ * the following to force a structures to a 32 byte boundary.
+ *
+ * __attribute__ ((aligned (32)))
+ *
+ * NOTE: Currently only the Priority Bit Map table uses this feature.
+ * To benefit from using this, the data must be heavily
+ * used so it will stay in the cache and used frequently enough
+ * in the executive to justify turning this on.
+ *
+ */
+
+#define CPU_STRUCTURE_ALIGNMENT __attribute__ ((aligned (64)))
+
+/*
+ * Define what is required to specify how the network to host conversion
+ * routines are handled.
+ *
+ * epiphany Specific Information:
+ *
+ * This version of RTEMS is designed specifically to run with
+ * big endian architectures. If you want little endian, you'll
+ * have to make the appropriate adjustments here and write
+ * efficient routines for byte swapping. The epiphany architecture
+ * doesn't do this very well.
+ */
+
+#define CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES FALSE
+#define CPU_BIG_ENDIAN FALSE
+#define CPU_LITTLE_ENDIAN TRUE
+
+/*
+ * The following defines the number of bits actually used in the
+ * interrupt field of the task mode. How those bits map to the
+ * CPU interrupt levels is defined by the routine _CPU_ISR_Set_level().
+ *
+ */
+
+#define CPU_MODES_INTERRUPT_MASK 0x00000001
+
+/*
+ * Processor defined structures required for cpukit/score.
+ */
+
+/*
+ * Contexts
+ *
+ * Generally there are 2 types of context to save.
+ * 1. Interrupt registers to save
+ * 2. Task level registers to save
+ *
+ * This means we have the following 3 context items:
+ * 1. task level context stuff:: Context_Control
+ * 2. floating point task stuff:: Context_Control_fp
+ * 3. special interrupt level context :: Context_Control_interrupt
+ *
+ * On some processors, it is cost-effective to save only the callee
+ * preserved registers during a task context switch. This means
+ * that the ISR code needs to save those registers which do not
+ * persist across function calls. It is not mandatory to make this
+ * distinctions between the caller/callee saves registers for the
+ * purpose of minimizing context saved during task switch and on interrupts.
+ * If the cost of saving extra registers is minimal, simplicity is the
+ * choice. Save the same context on interrupt entry as for tasks in
+ * this case.
+ *
+ * Additionally, if gdb is to be made aware of RTEMS tasks for this CPU, then
+ * care should be used in designing the context area.
+ *
+ * On some CPUs with hardware floating point support, the Context_Control_fp
+ * structure will not be used or it simply consist of an array of a
+ * fixed number of bytes. This is done when the floating point context
+ * is dumped by a "FP save context" type instruction and the format
+ * is not really defined by the CPU. In this case, there is no need
+ * to figure out the exact format -- only the size. Of course, although
+ * this is enough information for RTEMS, it is probably not enough for
+ * a debugger such as gdb. But that is another problem.
+ *
+ *
+ */
+#ifndef ASM
+
+typedef struct {
+ uint32_t r[64];
+
+ uint32_t status;
+ uint32_t config;
+ uint32_t iret;
+
+#ifdef RTEMS_SMP
+ /**
+ * @brief On SMP configurations the thread context must contain a boolean
+ * indicator to signal if this context is executing on a processor.
+ *
+ * This field must be updated during a context switch. The context switch
+ * to the heir must wait until the heir context indicates that it is no
+ * longer executing on a processor. The context switch must also check if
+ * a thread dispatch is necessary to honor updates of the heir thread for
+ * this processor. This indicator must be updated using an atomic test and
+ * set operation to ensure that at most one processor uses the heir
+ * context at the same time.
+ *
+ * @code
+ * void _CPU_Context_switch(
+ * Context_Control *executing,
+ * Context_Control *heir
+ * )
+ * {
+ * save( executing );
+ *
+ * executing->is_executing = false;
+ * memory_barrier();
+ *
+ * if ( test_and_set( &heir->is_executing ) ) {
+ * do {
+ * Per_CPU_Control *cpu_self = _Per_CPU_Get_snapshot();
+ *
+ * if ( cpu_self->dispatch_necessary ) {
+ * heir = _Thread_Get_heir_and_make_it_executing( cpu_self );
+ * }
+ * } while ( test_and_set( &heir->is_executing ) );
+ * }
+ *
+ * restore( heir );
+ * }
+ * @endcode
+ */
+ volatile bool is_executing;
+#endif
+} Context_Control;
+
+#define _CPU_Context_Get_SP( _context ) \
+ (_context)->r[13]
+
+typedef struct {
+ /** FPU registers are listed here */
+ double some_float_register;
+} Context_Control_fp;
+
+typedef Context_Control CPU_Interrupt_frame;
+
+/*
+ * The size of the floating point context area. On some CPUs this
+ * will not be a "sizeof" because the format of the floating point
+ * area is not defined -- only the size is. This is usually on
+ * CPUs with a "floating point save context" instruction.
+ *
+ * epiphany Specific Information:
+ *
+ */
+
+#define CPU_CONTEXT_FP_SIZE 0
+SCORE_EXTERN Context_Control_fp _CPU_Null_fp_context;
+
+/*
+ * Amount of extra stack (above minimum stack size) required by
+ * MPCI receive server thread. Remember that in a multiprocessor
+ * system this thread must exist and be able to process all directives.
+ *
+ */
+
+#define CPU_MPCI_RECEIVE_SERVER_EXTRA_STACK 0
+
+/*
+ * Should be large enough to run all RTEMS tests. This insures
+ * that a "reasonable" small application should not have any problems.
+ *
+ */
+
+#define CPU_STACK_MINIMUM_SIZE 4096
+
+/*
+ * CPU's worst alignment requirement for data types on a byte boundary. This
+ * alignment does not take into account the requirements for the stack.
+ *
+ */
+
+#define CPU_ALIGNMENT 8
+
+/*
+ * This is defined if the port has a special way to report the ISR nesting
+ * level. Most ports maintain the variable _ISR_Nest_level.
+ */
+#define CPU_PROVIDES_ISR_IS_IN_PROGRESS FALSE
+
+/*
+ * This number corresponds to the byte alignment requirement for the
+ * heap handler. This alignment requirement may be stricter than that
+ * for the data types alignment specified by CPU_ALIGNMENT. It is
+ * common for the heap to follow the same alignment requirement as
+ * CPU_ALIGNMENT. If the CPU_ALIGNMENT is strict enough for the heap,
+ * then this should be set to CPU_ALIGNMENT.
+ *
+ * NOTE: This does not have to be a power of 2 although it should be
+ * a multiple of 2 greater than or equal to 2. The requirement
+ * to be a multiple of 2 is because the heap uses the least
+ * significant field of the front and back flags to indicate
+ * that a block is in use or free. So you do not want any odd
+ * length blocks really putting length data in that bit.
+ *
+ * On byte oriented architectures, CPU_HEAP_ALIGNMENT normally will
+ * have to be greater or equal to than CPU_ALIGNMENT to ensure that
+ * elements allocated from the heap meet all restrictions.
+ *
+ */
+
+#define CPU_HEAP_ALIGNMENT CPU_ALIGNMENT
+
+/*
+ * This number corresponds to the byte alignment requirement for memory
+ * buffers allocated by the partition manager. This alignment requirement
+ * may be stricter than that for the data types alignment specified by
+ * CPU_ALIGNMENT. It is common for the partition to follow the same
+ * alignment requirement as CPU_ALIGNMENT. If the CPU_ALIGNMENT is strict
+ * enough for the partition, then this should be set to CPU_ALIGNMENT.
+ *
+ * NOTE: This does not have to be a power of 2. It does have to
+ * be greater or equal to than CPU_ALIGNMENT.
+ *
+ */
+
+#define CPU_PARTITION_ALIGNMENT CPU_ALIGNMENT
+
+/*
+ * This number corresponds to the byte alignment requirement for the
+ * stack. This alignment requirement may be stricter than that for the
+ * data types alignment specified by CPU_ALIGNMENT. If the CPU_ALIGNMENT
+ * is strict enough for the stack, then this should be set to 0.
+ *
+ * NOTE: This must be a power of 2 either 0 or greater than CPU_ALIGNMENT.
+ *
+ */
+
+#define CPU_STACK_ALIGNMENT 8
+
+/* ISR handler macros */
+
+/*
+ * Support routine to initialize the RTEMS vector table after it is allocated.
+ *
+ * NO_CPU Specific Information:
+ *
+ * XXX document implementation including references if appropriate
+ */
+
+#define _CPU_Initialize_vectors()
+
+/*
+ * Disable all interrupts for an RTEMS critical section. The previous
+ * level is returned in _level.
+ *
+ */
+
+static inline uint32_t epiphany_interrupt_disable( void )
+{
+ uint32_t sr;
+ asm volatile ("movfs %[sr], status \n" : [sr] "=r" (sr):);
+ asm volatile("gid \n");
+ return sr;
+}
+
+static inline void epiphany_interrupt_enable(uint32_t level)
+{
+ asm volatile("gie \n");
+ asm volatile ("movts status, %[level] \n" :: [level] "r" (level):);
+}
+
+#define _CPU_ISR_Disable( _level ) \
+ _level = epiphany_interrupt_disable()
+
+/*
+ * Enable interrupts to the previous level (returned by _CPU_ISR_Disable).
+ * This indicates the end of an RTEMS critical section. The parameter
+ * _level is not modified.
+ *
+ */
+
+#define _CPU_ISR_Enable( _level ) \
+ epiphany_interrupt_enable( _level )
+
+/*
+ * This temporarily restores the interrupt to _level before immediately
+ * disabling them again. This is used to divide long RTEMS critical
+ * sections into two or more parts. The parameter _level is not
+ * modified.
+ *
+ */
+
+#define _CPU_ISR_Flash( _level ) \
+ do{ \
+ if ( (_level & 0x2) != 0 ) \
+ _CPU_ISR_Enable( _level ); \
+ asm volatile("gid \n"); \
+ } while(0)
+
+/*
+ * Map interrupt level in task mode onto the hardware that the CPU
+ * actually provides. Currently, interrupt levels which do not
+ * map onto the CPU in a generic fashion are undefined. Someday,
+ * it would be nice if these were "mapped" by the application
+ * via a callout. For example, m68k has 8 levels 0 - 7, levels
+ * 8 - 255 would be available for bsp/application specific meaning.
+ * This could be used to manage a programmable interrupt controller
+ * via the rtems_task_mode directive.
+ *
+ * The get routine usually must be implemented as a subroutine.
+ *
+ */
+
+void _CPU_ISR_Set_level( uint32_t level );
+
+uint32_t _CPU_ISR_Get_level( void );
+
+/* end of ISR handler macros */
+
+/* Context handler macros */
+
+/*
+ * Initialize the context to a state suitable for starting a
+ * task after a context restore operation. Generally, this
+ * involves:
+ *
+ * - setting a starting address
+ * - preparing the stack
+ * - preparing the stack and frame pointers
+ * - setting the proper interrupt level in the context
+ * - initializing the floating point context
+ *
+ * This routine generally does not set any unnecessary register
+ * in the context. The state of the "general data" registers is
+ * undefined at task start time.
+ *
+ * NOTE: This is_fp parameter is TRUE if the thread is to be a floating
+ * point thread. This is typically only used on CPUs where the
+ * FPU may be easily disabled by software such as on the SPARC
+ * where the PSR contains an enable FPU bit.
+ *
+ */
+
+/**
+ * @brief Initializes the CPU context.
+ *
+ * The following steps are performed:
+ * - setting a starting address
+ * - preparing the stack
+ * - preparing the stack and frame pointers
+ * - setting the proper interrupt level in the context
+ *
+ * @param[in] context points to the context area
+ * @param[in] stack_area_begin is the low address of the allocated stack area
+ * @param[in] stack_area_size is the size of the stack area in bytes
+ * @param[in] new_level is the interrupt level for the task
+ * @param[in] entry_point is the task's entry point
+ * @param[in] is_fp is set to @c true if the task is a floating point task
+ * @param[in] tls_area is the thread-local storage (TLS) area
+ */
+void _CPU_Context_Initialize(
+ Context_Control *context,
+ void *stack_area_begin,
+ size_t stack_area_size,
+ uint32_t new_level,
+ void (*entry_point)( void ),
+ bool is_fp,
+ void *tls_area
+);
+
+/*
+ * This routine is responsible for somehow restarting the currently
+ * executing task. If you are lucky, then all that is necessary
+ * is restoring the context. Otherwise, there will need to be
+ * a special assembly routine which does something special in this
+ * case. Context_Restore should work most of the time. It will
+ * not work if restarting self conflicts with the stack frame
+ * assumptions of restoring a context.
+ *
+ */
+
+#define _CPU_Context_Restart_self( _the_context ) \
+ _CPU_Context_restore( (_the_context) );
+
+/*
+ * The purpose of this macro is to allow the initial pointer into
+ * a floating point context area (used to save the floating point
+ * context) to be at an arbitrary place in the floating point
+ * context area.
+ *
+ * This is necessary because some FP units are designed to have
+ * their context saved as a stack which grows into lower addresses.
+ * Other FP units can be saved by simply moving registers into offsets
+ * from the base of the context area. Finally some FP units provide
+ * a "dump context" instruction which could fill in from high to low
+ * or low to high based on the whim of the CPU designers.
+ *
+ */
+
+#define _CPU_Context_Fp_start( _base, _offset ) \
+ ( (void *) _Addresses_Add_offset( (_base), (_offset) ) )
+
+/*
+ * This routine initializes the FP context area passed to it to.
+ * There are a few standard ways in which to initialize the
+ * floating point context. The code included for this macro assumes
+ * that this is a CPU in which a "initial" FP context was saved into
+ * _CPU_Null_fp_context and it simply copies it to the destination
+ * context passed to it.
+ *
+ * Other models include (1) not doing anything, and (2) putting
+ * a "null FP status word" in the correct place in the FP context.
+ *
+ */
+
+#define _CPU_Context_Initialize_fp( _destination ) \
+ { \
+ *(*(_destination)) = _CPU_Null_fp_context; \
+ }
+
+/* end of Context handler macros */
+
+/* Fatal Error manager macros */
+
+/*
+ * This routine copies _error into a known place -- typically a stack
+ * location or a register, optionally disables interrupts, and
+ * halts/stops the CPU.
+ *
+ */
+
+#define _CPU_Fatal_halt(_source, _error ) \
+ if(_error == RTEMS_FATAL_SOURCE_EXIT) { \
+ printk("\nApplication exits normally.!\n"); \
+ asm volatile("": : :"memory"); \
+ asm volatile("gid; halt"); \
+ } \
+ else {\
+ printk("Fatal Error %d.%d Halted\n",_source, _error); \
+ asm("trap 3" :: "r" (_error)); \
+ }
+
+/* end of Fatal Error manager macros */
+
+/* Bitfield handler macros */
+
+/*
+ * This routine sets _output to the bit number of the first bit
+ * set in _value. _value is of CPU dependent type Priority_Bit_map_control.
+ * This type may be either 16 or 32 bits wide although only the 16
+ * least significant bits will be used.
+ *
+ * There are a number of variables in using a "find first bit" type
+ * instruction.
+ *
+ * (1) What happens when run on a value of zero?
+ * (2) Bits may be numbered from MSB to LSB or vice-versa.
+ * (3) The numbering may be zero or one based.
+ * (4) The "find first bit" instruction may search from MSB or LSB.
+ *
+ * RTEMS guarantees that (1) will never happen so it is not a concern.
+ * (2),(3), (4) are handled by the macros _CPU_Priority_mask() and
+ * _CPU_Priority_bits_index(). These three form a set of routines
+ * which must logically operate together. Bits in the _value are
+ * set and cleared based on masks built by _CPU_Priority_mask().
+ * The basic major and minor values calculated by _Priority_Major()
+ * and _Priority_Minor() are "massaged" by _CPU_Priority_bits_index()
+ * to properly range between the values returned by the "find first bit"
+ * instruction. This makes it possible for _Priority_Get_highest() to
+ * calculate the major and directly index into the minor table.
+ * This mapping is necessary to ensure that 0 (a high priority major/minor)
+ * is the first bit found.
+ *
+ * This entire "find first bit" and mapping process depends heavily
+ * on the manner in which a priority is broken into a major and minor
+ * components with the major being the 4 MSB of a priority and minor
+ * the 4 LSB. Thus (0 << 4) + 0 corresponds to priority 0 -- the highest
+ * priority. And (15 << 4) + 14 corresponds to priority 254 -- the next
+ * to the lowest priority.
+ *
+ * If your CPU does not have a "find first bit" instruction, then
+ * there are ways to make do without it. Here are a handful of ways
+ * to implement this in software:
+ *
+ * - a series of 16 bit test instructions
+ * - a "binary search using if's"
+ * - _number = 0
+ * if _value > 0x00ff
+ * _value >>=8
+ * _number = 8;
+ *
+ * if _value > 0x0000f
+ * _value >=8
+ * _number += 4
+ *
+ * _number += bit_set_table[ _value ]
+ *
+ * where bit_set_table[ 16 ] has values which indicate the first
+ * bit set
+ *
+ */
+
+ /* #define CPU_USE_GENERIC_BITFIELD_CODE FALSE */
+#define CPU_USE_GENERIC_BITFIELD_CODE TRUE
+#define CPU_USE_GENERIC_BITFIELD_DATA TRUE
+
+#if (CPU_USE_GENERIC_BITFIELD_CODE == FALSE)
+
+#define _CPU_Bitfield_Find_first_bit( _value, _output ) \
+ { \
+ (_output) = 0; /* do something to prevent warnings */ \
+ }
+#endif
+
+/* end of Bitfield handler macros */
+
+/*
+ * This routine builds the mask which corresponds to the bit fields
+ * as searched by _CPU_Bitfield_Find_first_bit(). See the discussion
+ * for that routine.
+ *
+ */
+
+#if (CPU_USE_GENERIC_BITFIELD_CODE == FALSE)
+
+#define _CPU_Priority_Mask( _bit_number ) \
+ (1 << _bit_number)
+
+#endif
+
+/*
+ * This routine translates the bit numbers returned by
+ * _CPU_Bitfield_Find_first_bit() into something suitable for use as
+ * a major or minor component of a priority. See the discussion
+ * for that routine.
+ *
+ */
+
+#if (CPU_USE_GENERIC_BITFIELD_CODE == FALSE)
+
+#define _CPU_Priority_bits_index( _priority ) \
+ (_priority)
+
+#endif
+
+#define CPU_TIMESTAMP_USE_STRUCT_TIMESPEC FALSE
+#define CPU_TIMESTAMP_USE_INT64 TRUE
+#define CPU_TIMESTAMP_USE_INT64_INLINE FALSE
+
+typedef struct {
+/* There is no CPU specific per-CPU state */
+} CPU_Per_CPU_control;
+#endif /* ASM */
+
+/**
+ * Size of a pointer.
+ *
+ * This must be an integer literal that can be used by the assembler. This
+ * value will be used to calculate offsets of structure members. These
+ * offsets will be used in assembler code.
+ */
+#define CPU_SIZEOF_POINTER 4
+
+#define CPU_PER_CPU_CONTROL_SIZE 0
+
+#ifndef ASM
+typedef uint16_t Priority_bit_map_Word;
+
+typedef struct {
+ uint32_t r[64];
+ uint32_t status;
+ uint32_t config;
+ uint32_t iret;
+} CPU_Exception_frame;
+
+/**
+ * @brief Prints the exception frame via printk().
+ *
+ * @see rtems_fatal() and RTEMS_FATAL_SOURCE_EXCEPTION.
+ */
+void _CPU_Exception_frame_print( const CPU_Exception_frame *frame );
+
+
+/* end of Priority handler macros */
+
+/* functions */
+
+/*
+ * _CPU_Initialize
+ *
+ * This routine performs CPU dependent initialization.
+ *
+ */
+
+void _CPU_Initialize(
+ void
+);
+
+/*
+ * _CPU_ISR_install_raw_handler
+ *
+ * This routine installs a "raw" interrupt handler directly into the
+ * processor's vector table.
+ *
+ */
+
+void _CPU_ISR_install_raw_handler(
+ uint32_t vector,
+ proc_ptr new_handler,
+ proc_ptr *old_handler
+);
+
+/*
+ * _CPU_ISR_install_vector
+ *
+ * This routine installs an interrupt vector.
+ *
+ * NO_CPU Specific Information:
+ *
+ * XXX document implementation including references if appropriate
+ */
+
+void _CPU_ISR_install_vector(
+ uint32_t vector,
+ proc_ptr new_handler,
+ proc_ptr *old_handler
+);
+
+/*
+ * _CPU_Install_interrupt_stack
+ *
+ * This routine installs the hardware interrupt stack pointer.
+ *
+ * NOTE: It need only be provided if CPU_HAS_HARDWARE_INTERRUPT_STACK
+ * is TRUE.
+ *
+ */
+
+void _CPU_Install_interrupt_stack( void );
+
+/*
+ * _CPU_Thread_Idle_body
+ *
+ * This routine is the CPU dependent IDLE thread body.
+ *
+ * NOTE: It need only be provided if CPU_PROVIDES_IDLE_THREAD_BODY
+ * is TRUE.
+ *
+ */
+
+void *_CPU_Thread_Idle_body( uintptr_t ignored );
+
+/*
+ * _CPU_Context_switch
+ *
+ * This routine switches from the run context to the heir context.
+ *
+ * epiphany Specific Information:
+ *
+ * Please see the comments in the .c file for a description of how
+ * this function works. There are several things to be aware of.
+ */
+
+void _CPU_Context_switch(
+ Context_Control *run,
+ Context_Control *heir
+);
+
+/*
+ * _CPU_Context_restore
+ *
+ * This routine is generally used only to restart self in an
+ * efficient manner. It may simply be a label in _CPU_Context_switch.
+ *
+ * NOTE: May be unnecessary to reload some registers.
+ *
+ */
+
+void _CPU_Context_restore(
+ Context_Control *new_context
+);
+
+/*
+ * _CPU_Context_save_fp
+ *
+ * This routine saves the floating point context passed to it.
+ *
+ */
+
+void _CPU_Context_save_fp(
+ void **fp_context_ptr
+);
+
+/*
+ * _CPU_Context_restore_fp
+ *
+ * This routine restores the floating point context passed to it.
+ *
+ */
+
+void _CPU_Context_restore_fp(
+ void **fp_context_ptr
+);
+
+/* The following routine swaps the endian format of an unsigned int.
+ * It must be static because it is referenced indirectly.
+ *
+ * This version will work on any processor, but if there is a better
+ * way for your CPU PLEASE use it. The most common way to do this is to:
+ *
+ * swap least significant two bytes with 16-bit rotate
+ * swap upper and lower 16-bits
+ * swap most significant two bytes with 16-bit rotate
+ *
+ * Some CPUs have special instructions which swap a 32-bit quantity in
+ * a single instruction (e.g. i486). It is probably best to avoid
+ * an "endian swapping control bit" in the CPU. One good reason is
+ * that interrupts would probably have to be disabled to insure that
+ * an interrupt does not try to access the same "chunk" with the wrong
+ * endian. Another good reason is that on some CPUs, the endian bit
+ * endianness for ALL fetches -- both code and data -- so the code
+ * will be fetched incorrectly.
+ *
+ */
+
+static inline unsigned int CPU_swap_u32(
+ unsigned int value
+)
+{
+ uint32_t byte1, byte2, byte3, byte4, swapped;
+
+ byte4 = (value >> 24) & 0xff;
+ byte3 = (value >> 16) & 0xff;
+ byte2 = (value >> 8) & 0xff;
+ byte1 = value & 0xff;
+
+ swapped = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4;
+ return( swapped );
+}
+
+#define CPU_swap_u16( value ) \
+ (((value&0xff) << 8) | ((value >> 8)&0xff))
+
+static inline void _CPU_Context_volatile_clobber( uintptr_t pattern )
+{
+ /* TODO */
+}
+
+static inline void _CPU_Context_validate( uintptr_t pattern )
+{
+ while (1) {
+ /* TODO */
+ }
+}
+
+typedef uint32_t CPU_Counter_ticks;
+
+CPU_Counter_ticks _CPU_Counter_read( void );
+
+static inline CPU_Counter_ticks _CPU_Counter_difference(
+ CPU_Counter_ticks second,
+ CPU_Counter_ticks first
+)
+{
+ return second - first;
+}
+
+#ifdef RTEMS_SMP
+ /**
+ * @brief Performs CPU specific SMP initialization in the context of the boot
+ * processor.
+ *
+ * This function is invoked on the boot processor during system
+ * initialization. All interrupt stacks are allocated at this point in case
+ * the CPU port allocates the interrupt stacks. This function is called
+ * before _CPU_SMP_Start_processor() or _CPU_SMP_Finalize_initialization() is
+ * used.
+ *
+ * @return The count of physically or virtually available processors.
+ * Depending on the configuration the application may use not all processors.
+ */
+ uint32_t _CPU_SMP_Initialize( void );
+
+ /**
+ * @brief Starts a processor specified by its index.
+ *
+ * This function is invoked on the boot processor during system
+ * initialization.
+ *
+ * This function will be called after _CPU_SMP_Initialize().
+ *
+ * @param[in] cpu_index The processor index.
+ *
+ * @retval true Successful operation.
+ * @retval false Unable to start this processor.
+ */
+ bool _CPU_SMP_Start_processor( uint32_t cpu_index );
+
+ /**
+ * @brief Performs final steps of CPU specific SMP initialization in the
+ * context of the boot processor.
+ *
+ * This function is invoked on the boot processor during system
+ * initialization.
+ *
+ * This function will be called after all processors requested by the
+ * application have been started.
+ *
+ * @param[in] cpu_count The minimum value of the count of processors
+ * requested by the application configuration and the count of physically or
+ * virtually available processors.
+ */
+ void _CPU_SMP_Finalize_initialization( uint32_t cpu_count );
+
+ /**
+ * @brief Returns the index of the current processor.
+ *
+ * An architecture specific method must be used to obtain the index of the
+ * current processor in the system. The set of processor indices is the
+ * range of integers starting with zero up to the processor count minus one.
+ */
+ uint32_t _CPU_SMP_Get_current_processor( void );
+
+ /**
+ * @brief Sends an inter-processor interrupt to the specified target
+ * processor.
+ *
+ * This operation is undefined for target processor indices out of range.
+ *
+ * @param[in] target_processor_index The target processor index.
+ */
+ void _CPU_SMP_Send_interrupt( uint32_t target_processor_index );
+
+ /**
+ * @brief Broadcasts a processor event.
+ *
+ * Some architectures provide a low-level synchronization primitive for
+ * processors in a multi-processor environment. Processors waiting for this
+ * event may go into a low-power state and stop generating system bus
+ * transactions. This function must ensure that preceding store operations
+ * can be observed by other processors.
+ *
+ * @see _CPU_SMP_Processor_event_receive().
+ */
+ void _CPU_SMP_Processor_event_broadcast( void );
+
+ /**
+ * @brief Receives a processor event.
+ *
+ * This function will wait for the processor event and may wait forever if no
+ * such event arrives.
+ *
+ * @see _CPU_SMP_Processor_event_broadcast().
+ */
+ static inline void _CPU_SMP_Processor_event_receive( void )
+ {
+ __asm__ volatile ( "" : : : "memory" );
+ }
+
+ /**
+ * @brief Gets the is executing indicator of the thread context.
+ *
+ * @param[in] context The context.
+ */
+ static inline bool _CPU_Context_Get_is_executing(
+ const Context_Control *context
+ )
+ {
+ return context->is_executing;
+ }
+
+ /**
+ * @brief Sets the is executing indicator of the thread context.
+ *
+ * @param[in] context The context.
+ * @param[in] is_executing The new value for the is executing indicator.
+ */
+ static inline void _CPU_Context_Set_is_executing(
+ Context_Control *context,
+ bool is_executing
+ )
+ {
+ context->is_executing = is_executing;
+ }
+#endif /* RTEMS_SMP */
+
+#endif /* ASM */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/cpukit/score/cpu/epiphany/rtems/score/cpu_asm.h b/cpukit/score/cpu/epiphany/rtems/score/cpu_asm.h
new file mode 100644
index 0000000..cc091fa
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/score/cpu_asm.h
@@ -0,0 +1,74 @@
+/**
+ * @file
+ *
+ * @brief Epiphany Assembly File
+ *
+ * Very loose template for an include file for the cpu_asm.? file
+ * if it is implemented as a ".S" file (preprocessed by cpp) instead
+ * of a ".s" file (preprocessed by gm4 or gasp).
+ */
+
+/*
+ * COPYRIGHT (c) 1989-1999.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * 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.
+ *
+ */
+
+#ifndef _RTEMS_SCORE_CPU_ASM_H
+#define _RTEMS_SCORE_CPU_ASM_H
+
+/* pull in the generated offsets */
+
+/*
+#include <rtems/score/offsets.h>
+*/
+
+/*
+ * Hardware General Registers
+ */
+
+/* put something here */
+
+/*
+ * Hardware Floating Point Registers
+ */
+
+/* put something here */
+
+/*
+ * Hardware Control Registers
+ */
+
+/* put something here */
+
+/*
+ * Calling Convention
+ */
+
+/* put something here */
+
+/*
+ * Temporary registers
+ */
+
+/* put something here */
+
+/*
+ * Floating Point Registers - SW Conventions
+ */
+
+/* put something here */
+
+/*
+ * Temporary floating point registers
+ */
+
+/* put something here */
+
+#endif
+
+/* end of file */
diff --git a/cpukit/score/cpu/epiphany/rtems/score/cpuatomic.h b/cpukit/score/cpu/epiphany/rtems/score/cpuatomic.h
new file mode 100644
index 0000000..598ee76
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/score/cpuatomic.h
@@ -0,0 +1,14 @@
+/*
+ * COPYRIGHT (c) 2012-2013 Deng Hengyi.
+ *
+ * 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.
+ */
+
+#ifndef _RTEMS_SCORE_ATOMIC_CPU_H
+#define _RTEMS_SCORE_ATOMIC_CPU_H
+
+#include <rtems/score/cpustdatomic.h>
+
+#endif /* _RTEMS_SCORE_ATOMIC_CPU_H */
diff --git a/cpukit/score/cpu/epiphany/rtems/score/epiphany-utility.h b/cpukit/score/cpu/epiphany/rtems/score/epiphany-utility.h
new file mode 100644
index 0000000..53ebe87
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/score/epiphany-utility.h
@@ -0,0 +1,180 @@
+/*
+ * This include file contains macros pertaining to the
+ * Epiphany processor family.
+ *
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ */
+
+#ifndef _EPIPHANY_UTILITY_H
+#define _EPIPHANY_UTILITY_H
+
+/* eCore IRQs */
+typedef enum
+{
+ START,
+ SW_EXCEPTION,
+ MEM_FAULT,
+ TIMER0,
+ TIMER1,
+ SMP_MESSAGE,
+ DMA0,
+ DMA1,
+ SER,
+} IRQ_PER_CORE_T;
+
+/* Per-core IO mapped register addresses
+ * @see Epiphany architecture reference.
+ */
+#define EPIPHANY_PER_CORE_REG_CONFIG 0xF0400
+#define EPIPHANY_PER_CORE_REG_STATUS 0xF0404
+#define EPIPHANY_PER_CORE_REG_PC 0xF0408
+#define EPIPHANY_PER_CORE_REG_DEBUGSTATUS 0xF040C
+#define EPIPHANY_PER_CORE_REG_LC 0xF0414
+#define EPIPHANY_PER_CORE_REG_LS 0xF0418
+#define EPIPHANY_PER_CORE_REG_LE 0xF041C
+#define EPIPHANY_PER_CORE_REG_IRET 0xF0420
+#define EPIPHANY_PER_CORE_REG_IMASK 0xF0424
+#define EPIPHANY_PER_CORE_REG_ILAT 0xF0428
+#define EPIPHANY_PER_CORE_REG_ILATST 0xF042C
+#define EPIPHANY_PER_CORE_REG_ILATCL 0xF0430
+#define EPIPHANY_PER_CORE_REG_IPEND 0xF0434
+#define EPIPHANY_PER_CORE_REG_FSTATUS 0xF0440
+#define EPIPHANY_PER_CORE_REG_DEBUGCMD 0xF0448
+#define EPIPHANY_PER_CORE_REG_RESETCORE 0xF070C
+
+/* Event timer registers */
+#define EPIPHANY_PER_CORE_REG_CTIMER0 0xF0438
+#define EPIPHANY_PER_CORE_REG_CTIMER1 0xF043C
+
+/* Processor control registers */
+#define EPIPHANY_PER_CORE_REG_MEMSTATUS 0xF0604
+#define EPIPHANY_PER_CORE_REG_MEMPROTECT 0xF0608
+
+/* DMA Registers */
+#define EPIPHANY_PER_CORE_REG_DMA0CONFIG 0xF0500
+#define EPIPHANY_PER_CORE_REG_DMA0STRIDE 0xF0504
+#define EPIPHANY_PER_CORE_REG_DMA0COUNT 0xF0508
+#define EPIPHANY_PER_CORE_REG_DMA0SRCADDR 0xF050C
+#define EPIPHANY_PER_CORE_REG_DMA0DSTADDR 0xF0510
+#define EPIPHANY_PER_CORE_REG_DMA0AUTO0 0xF0514
+#define EPIPHANY_PER_CORE_REG_DMA0AUTO1 0xF0518
+#define EPIPHANY_PER_CORE_REG_DMA0STATUS 0xF051C
+#define EPIPHANY_PER_CORE_REG_DMA1CONFIG 0xF0520
+#define EPIPHANY_PER_CORE_REG_DMA1STRIDE 0xF0524
+#define EPIPHANY_PER_CORE_REG_DMA1COUNT 0xF0528
+#define EPIPHANY_PER_CORE_REG_DMA1SRCADDR 0xF052C
+#define EPIPHANY_PER_CORE_REG_DMA1DSTADDR 0xF0530
+#define EPIPHANY_PER_CORE_REG_DMA1AUTO0 0xF0534
+#define EPIPHANY_PER_CORE_REG_DMA1AUTO1 0xF0538
+#define EPIPHANY_PER_CORE_REG_DMA1STATUS 0xF053C
+
+/* Mesh Node Control Registers */
+#define EPIPHANY_PER_CORE_REG_MESHCONFIG 0xF0700
+#define EPIPHANY_PER_CORE_REG_COREID 0xF0704
+#define EPIPHANY_PER_CORE_REG_MULTICAST 0xF0708
+#define EPIPHANY_PER_CORE_REG_CMESHROUTE 0xF0710
+#define EPIPHANY_PER_CORE_REG_XMESHROUTE 0xF0714
+#define EPIPHANY_PER_CORE_REG_RMESHROUTE 0xF0718
+
+/* This macros constructs an address space of epiphany cores
+ * from their IDs.
+ */
+#define EPIPHANY_COREID_TO_MSB_ADDR(id) (id) << 20
+
+/* Construct a complete/absolute IO mapped address register from
+ * core ID and register name
+ */
+#define EPIPHANY_GET_REG_ABSOLUTE_ADDR(coreid, reg) \
+ (EPIPHANY_COREID_TO_MSB_ADDR(coreid) | (reg))
+
+#define EPIPHANY_REG(reg) (uint32_t *) (reg)
+
+static inline uint32_t epiphany_coreid_to_rtems_map(uint32_t coreid);
+
+/* Read register with its absolute address */
+static inline uint32_t read_epiphany_reg(volatile uint32_t reg_addr)
+{
+ return *(EPIPHANY_REG(reg_addr));
+}
+
+/* Write register with its abolute address */
+static inline void write_epiphany_reg(volatile uint32_t reg_addr, uint32_t val)
+{
+ *(EPIPHANY_REG(reg_addr)) = val;
+}
+
+/* Epiphany uses 12 bits for defining core IDs, while RTEMS uses
+ * linear IDs. The following function converts RTEMS linear IDs to
+ * Epiphany correspodning ones
+ */
+static inline uint32_t rtems_coreid_to_epiphany_map(uint32_t rtems_id)
+{
+ switch(rtems_id)
+ {
+ case (0) : return 0x808; /* (32, 8) */
+ case (1) : return 0x809; /* (32, 9) */
+ case (2) : return 0x80A; /* (32,10) */
+ case (3) : return 0x80B; /* (32,11) */
+ case (4) : return 0x848; /* (33, 8) */
+ case (5) : return 0x849; /* (33, 9) */
+ case (6) : return 0x84A; /* (33,10) */
+ case (7) : return 0x84B; /* (33,11) */
+ case (8) : return 0x888; /* (34, 8) */
+ case (9) : return 0x889; /* (34, 9) */
+ case (10): return 0x88A; /* (34,10) */
+ case (11): return 0x88B; /* (34,11) */
+ case (12): return 0x8C8; /* (35, 8) */
+ case (13): return 0x8C9; /* (35, 9) */
+ case (14): return 0x8CA; /* (35,10) */
+ case (15): return 0x8CB; /* (35,11) */
+ default: return 0x1000; /* Error */
+ }
+
+ return 0x1000; /* Error */
+}
+
+/* Epiphany uses 12 bits for defining core IDs, while RTEMS uses
+ * linear IDs. The following function is used to map Epiphany IDs to
+ * RTEMS linear IDs.
+ */
+inline uint32_t epiphany_coreid_to_rtems_map(uint32_t epiphany_id)
+{
+ switch(epiphany_id)
+ {
+ case (0x808): return 0; /* (32, 8) */
+ case (0x809): return 1; /* (32, 9) */
+ case (0x80A): return 2; /* (32,10) */
+ case (0x80B): return 3; /* (32,11) */
+ case (0x848): return 4; /* (33, 8) */
+ case (0x849): return 5; /* (33, 9) */
+ case (0x84A): return 6; /* (33,10) */
+ case (0x84B): return 7; /* (33,11) */
+ case (0x888): return 8; /* (34, 8) */
+ case (0x889): return 9; /* (34, 9) */
+ case (0x88A): return 10; /* (34,10) */
+ case (0x88B): return 11; /* (34,11) */
+ case (0x8C8): return 12; /* (35, 8) */
+ case (0x8C9): return 13; /* (35, 9) */
+ case (0x8CA): return 14; /* (35,10) */
+ case (0x8CB): return 15; /* (35,11) */
+ default: return 0x1000; /* Error */
+ }
+
+ return 0x1000; /* Error */
+}
+
+static inline uint32_t _Epiphany_Get_Current_coreid()
+{
+ uint32_t coreid;
+
+ asm volatile ("movfs %0, coreid" : "=r" (coreid): );
+
+ return epiphany_coreid_to_rtems_map(coreid);
+}
+#endif /* _EPIPHANY_UTILITY_H */
diff --git a/cpukit/score/cpu/epiphany/rtems/score/epiphany.h b/cpukit/score/cpu/epiphany/rtems/score/epiphany.h
new file mode 100644
index 0000000..3aeb6d9
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/score/epiphany.h
@@ -0,0 +1,50 @@
+/**
+ * @file rtems/score/epiphany.h
+ */
+
+/*
+ * This file contains information pertaining to the Epiphany processor.
+ *
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * Based on code with the following copyright...
+ * COPYRIGHT (c) 1989-1999, 2010.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * 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.
+ */
+
+#ifndef _RTEMS_SCORE_EPIPHANY_H
+#define _RTEMS_SCORE_EPIPHANY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * This file contains the information required to build
+ * RTEMS for a particular member of the Epiphany family.
+ * It does this by setting variables to indicate which
+ * implementation dependent features are present in a particular
+ * member of the family.
+ *
+ * This is a good place to list all the known CPU models
+ * that this port supports and which RTEMS CPU model they correspond
+ * to.
+ */
+
+ /*
+ * Define the name of the CPU family and specific model.
+ */
+
+#define CPU_NAME "EPIPHANY"
+#define CPU_MODEL_NAME "EPIPHANY"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTEMS_SCORE_EPIPHANY_H */
diff --git a/cpukit/score/cpu/epiphany/rtems/score/types.h b/cpukit/score/cpu/epiphany/rtems/score/types.h
new file mode 100644
index 0000000..21c82a0
--- /dev/null
+++ b/cpukit/score/cpu/epiphany/rtems/score/types.h
@@ -0,0 +1,55 @@
+/**
+ * @file
+ *
+ * @brief Epiphany Architecture Types API
+ */
+
+/*
+ * This include file contains type definitions pertaining to the
+ * Epiphany processor family.
+ *
+ * COPYRIGHT (c) 2015 University of York.
+ * Hesham ALMatary <hmka501 at york.ac.uk>
+ *
+ * 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.
+ *
+ */
+
+ #ifndef _RTEMS_SCORE_TYPES_H
+#define _RTEMS_SCORE_TYPES_H
+
+#include <rtems/score/basedefs.h>
+
+#ifndef ASM
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @addtogroup ScoreCPU
+ */
+/**@{**/
+
+/*
+ * This section defines the basic types for this processor.
+ */
+
+/** Type that can store a 32-bit integer or a pointer. */
+typedef uintptr_t CPU_Uint32ptr;
+
+typedef uint16_t Priority_bit_map_Word;
+typedef void epiphany_isr;
+typedef void ( *epiphany_isr_entry )( void );
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !ASM */
+
+#endif
--
2.1.0
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