[PATCH v1 1/5] cpukit/microblaze: Add exception framework
Kinsey Moore
kinsey.moore at oarcorp.com
Tue Feb 1 15:25:54 UTC 2022
This patch updates the CPU_Exception_frame to include all necessary
registers, combines hardware snd software exception handlers into a
shared vector, provides an architecture-specific hook for taking
control of exception handling, and moves exception handling over to
actually using the CPU_Exception_frame instead of a minimal interrupt
stack frame. As the significant contents of _exception_handler.S have
been entirely rewritten, the copyright information on this file has been
updated to reflect that.
---
.../start/_exception_handler.S | 129 ++++++++++++------
.../start/_hw_exception_handler.S | 52 -------
bsps/microblaze/shared/start/start.S | 7 +-
cpukit/score/cpu/microblaze/cpu.c | 85 ++++++++++++
cpukit/score/cpu/microblaze/cpu_asm.S | 13 --
.../cpu/microblaze/include/rtems/score/cpu.h | 106 +++++++++++++-
.../bsps/microblaze/microblaze_fpga/obj.yml | 1 -
7 files changed, 283 insertions(+), 110 deletions(-)
delete mode 100644 bsps/microblaze/microblaze_fpga/start/_hw_exception_handler.S
diff --git a/bsps/microblaze/microblaze_fpga/start/_exception_handler.S b/bsps/microblaze/microblaze_fpga/start/_exception_handler.S
index 1d96b694a7..25caf63d9c 100644
--- a/bsps/microblaze/microblaze_fpga/start/_exception_handler.S
+++ b/bsps/microblaze/microblaze_fpga/start/_exception_handler.S
@@ -1,52 +1,103 @@
-/* SPDX-License-Identifier: BSD-3-Clause */
+/* SPDX-License-Identifier: BSD-2-Clause */
-/* Copyright (c) 2001, 2009 Xilinx, Inc. All rights reserved.
+/**
+ * @file
+ *
+ * @ingroup RTEMSBSPsMicroblaze
+ *
+ * @brief MicroBlaze exception handler implementation
+ */
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
+/*
+ * Copyright (C) 2022 On-Line Applications Research Corporation (OAR)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
- 1. Redistributions source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- 3. Neither the name of Xilinx nor the names of its contributors may be
- used to endorse or promote products derived from this software without
- specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-*/
+#include <rtems/score/cpu.h>
.text
.globl _exception_handler # Exception Handler Label
.align 2
_exception_handler:
-#ifndef __rtems__
- rtsd r17, 0
- nop
-#else /* __rtems__ */
- /* Subtract stack frame */
- addik r1, r1, -52
+ /* Subtract exception frame */
+ addik r1, r1, -(CPU_EXCEPTION_FRAME_SIZE)
+
+ /* Store program state */
+ swi r2, r1, MICROBLAZE_EXCEPTION_FRAME_R2
+ swi r3, r1, MICROBLAZE_EXCEPTION_FRAME_R3
+ swi r4, r1, MICROBLAZE_EXCEPTION_FRAME_R4
+ swi r5, r1, MICROBLAZE_EXCEPTION_FRAME_R5
+ swi r6, r1, MICROBLAZE_EXCEPTION_FRAME_R6
+ swi r7, r1, MICROBLAZE_EXCEPTION_FRAME_R7
+ swi r8, r1, MICROBLAZE_EXCEPTION_FRAME_R8
+ swi r9, r1, MICROBLAZE_EXCEPTION_FRAME_R9
+ swi r10, r1, MICROBLAZE_EXCEPTION_FRAME_R10
+ swi r11, r1, MICROBLAZE_EXCEPTION_FRAME_R11
+ swi r12, r1, MICROBLAZE_EXCEPTION_FRAME_R12
+ swi r13, r1, MICROBLAZE_EXCEPTION_FRAME_R13
+ swi r14, r1, MICROBLAZE_EXCEPTION_FRAME_R14
+ swi r15, r1, MICROBLAZE_EXCEPTION_FRAME_R15
+ swi r16, r1, MICROBLAZE_EXCEPTION_FRAME_R16
+ swi r17, r1, MICROBLAZE_EXCEPTION_FRAME_R17
+ swi r18, r1, MICROBLAZE_EXCEPTION_FRAME_R18
+ swi r19, r1, MICROBLAZE_EXCEPTION_FRAME_R19
+ swi r20, r1, MICROBLAZE_EXCEPTION_FRAME_R20
+ swi r21, r1, MICROBLAZE_EXCEPTION_FRAME_R21
+ swi r22, r1, MICROBLAZE_EXCEPTION_FRAME_R22
+ swi r23, r1, MICROBLAZE_EXCEPTION_FRAME_R23
+ swi r24, r1, MICROBLAZE_EXCEPTION_FRAME_R24
+ swi r25, r1, MICROBLAZE_EXCEPTION_FRAME_R25
+ swi r26, r1, MICROBLAZE_EXCEPTION_FRAME_R26
+ swi r27, r1, MICROBLAZE_EXCEPTION_FRAME_R27
+ swi r28, r1, MICROBLAZE_EXCEPTION_FRAME_R28
+ swi r29, r1, MICROBLAZE_EXCEPTION_FRAME_R29
+ swi r30, r1, MICROBLAZE_EXCEPTION_FRAME_R30
+ swi r31, r1, MICROBLAZE_EXCEPTION_FRAME_R31
+
+ /* Retrieve and store MSR */
+ mfs r3, rmsr
+ swi r3, r1, MICROBLAZE_EXCEPTION_FRAME_MSR
+
+ /* Retrieve and store EAR */
+ mfs r3, rear
+ swi r3, r1, MICROBLAZE_EXCEPTION_FRAME_EAR
+
+ /* Retrieve and store ESR */
+ mfs r3, resr
+ swi r3, r1, MICROBLAZE_EXCEPTION_FRAME_ESR
+
+ /* Retrieve and store BTR */
+ mfs r3, rbtr
+ swi r3, r1, MICROBLAZE_EXCEPTION_FRAME_BTR
- swi r5, r1, 8
+ /* Calculate and store original stack pointer */
+ addik r3, r1, CPU_EXCEPTION_FRAME_SIZE
+ swi r3, r1, MICROBLAZE_EXCEPTION_FRAME_R1
- addi r5, r0, 0xFFFF
+ /* set parameter 1 to CPU Exception frame */
+ addi r5, r1, 0
- braid _ISR_Handler
+ /* call into the debug framework */
+ braid _CPU_Exception_handle
nop
-#endif /* __rtems__ */
diff --git a/bsps/microblaze/microblaze_fpga/start/_hw_exception_handler.S b/bsps/microblaze/microblaze_fpga/start/_hw_exception_handler.S
deleted file mode 100644
index 30436a43e9..0000000000
--- a/bsps/microblaze/microblaze_fpga/start/_hw_exception_handler.S
+++ /dev/null
@@ -1,52 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause */
-
-/* Copyright (c) 2001, 2009 Xilinx, Inc. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- 1. Redistributions source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- 3. Neither the name of Xilinx nor the names of its contributors may be
- used to endorse or promote products derived from this software without
- specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-*/
-
- .text
- .globl _hw_exception_handler # HW Exception Handler Label
- .align 2
-
- _hw_exception_handler:
-#ifndef __rtems__
- rtsd r17, 0
- nop
-#else /* __rtems__ */
- /* Subtract stack frame */
- addik r1, r1, -52
-
- swi r5, r1, 8
-
- addi r5, r0, 0xFFFF
-
- braid _ISR_Handler
- nop
-#endif /* __rtems__ */
diff --git a/bsps/microblaze/shared/start/start.S b/bsps/microblaze/shared/start/start.S
index 97250f9316..bd50fe0d24 100644
--- a/bsps/microblaze/shared/start/start.S
+++ b/bsps/microblaze/shared/start/start.S
@@ -76,7 +76,12 @@ _vector_interrupt:
.section .vectors.hw_exception, "ax"
.align 2
_vector_hw_exception:
- brai _hw_exception_handler
+/*
+ * Hardware and software exceptions are handled identically with the MSR[EiP]
+ * bit differentiating them and determining which register should be used for
+ * return.
+ */
+ brai _exception_handler
.section .text
.globl _start1
diff --git a/cpukit/score/cpu/microblaze/cpu.c b/cpukit/score/cpu/microblaze/cpu.c
index de8fbfbba1..84b85c44e0 100644
--- a/cpukit/score/cpu/microblaze/cpu.c
+++ b/cpukit/score/cpu/microblaze/cpu.c
@@ -38,6 +38,10 @@
#include "config.h"
#endif
+#include <inttypes.h>
+
+#include <rtems/bspIo.h>
+#include <rtems/fatal.h>
#include <rtems/score/isr.h>
#include <rtems/score/tls.h>
#include <rtems/score/wkspace.h>
@@ -75,6 +79,60 @@ void _CPU_Context_Initialize(
void _CPU_Exception_frame_print( const CPU_Exception_frame *ctx )
{
+ printk(
+ "\n"
+ "R0 = 0x%08" PRIx32 " R17 = %p\n"
+ "R1 = 0x%08" PRIx32 " R18 = 0x%08" PRIx32 "\n"
+ "R2 = 0x%08" PRIx32 " R19 = 0x%08" PRIx32 "\n"
+ "R3 = 0x%08" PRIx32 " R20 = 0x%08" PRIx32 "\n"
+ "R4 = 0x%08" PRIx32 " R21 = 0x%08" PRIx32 "\n"
+ "R5 = 0x%08" PRIx32 " R22 = 0x%08" PRIx32 "\n"
+ "R6 = 0x%08" PRIx32 " R23 = 0x%08" PRIx32 "\n"
+ "R7 = 0x%08" PRIx32 " R24 = 0x%08" PRIx32 "\n"
+ "R8 = 0x%08" PRIx32 " R25 = 0x%08" PRIx32 "\n"
+ "R9 = 0x%08" PRIx32 " R26 = 0x%08" PRIx32 "\n"
+ "R10 = 0x%08" PRIx32 " R27 = 0x%08" PRIx32 "\n"
+ "R11 = 0x%08" PRIx32 " R28 = 0x%08" PRIx32 "\n"
+ "R12 = 0x%08" PRIx32 " R29 = 0x%08" PRIx32 "\n"
+ "R13 = 0x%08" PRIx32 " R30 = 0x%08" PRIx32 "\n"
+ "R14 = %p" " R31 = 0x%08" PRIx32 "\n"
+ "R15 = %p" " ESR = 0x%08" PRIx32 "\n"
+ "R16 = %p" " EAR = %p\n",
+ 0, ctx->r17,
+ ctx->r1, ctx->r18,
+ ctx->r2, ctx->r19,
+ ctx->r3, ctx->r20,
+ ctx->r4, ctx->r21,
+ ctx->r5, ctx->r22,
+ ctx->r6, ctx->r23,
+ ctx->r7, ctx->r24,
+ ctx->r8, ctx->r25,
+ ctx->r9, ctx->r26,
+ ctx->r10, ctx->r27,
+ ctx->r11, ctx->r28,
+ ctx->r12, ctx->r29,
+ ctx->r13, ctx->r30,
+ ctx->r14, ctx->r31,
+ ctx->r15, ctx->esr,
+ ctx->r16, ctx->ear
+ );
+
+ printk(
+ "MSR = 0x%08" PRIx32 " %s%s%s%s%s%s%s%s%s%s%s%s\n",
+ ctx->msr,
+ ( ctx->msr & MICROBLAZE_MSR_VM ) ? "VM " : "",
+ ( ctx->msr & MICROBLAZE_MSR_UM ) ? "UM " : "",
+ ( ctx->msr & MICROBLAZE_MSR_PVR ) ? "PVR " : "",
+ ( ctx->msr & MICROBLAZE_MSR_EIP ) ? "EiP " : "",
+ ( ctx->msr & MICROBLAZE_MSR_EE ) ? "EE " : "",
+ ( ctx->msr & MICROBLAZE_MSR_DCE ) ? "DCE " : "",
+ ( ctx->msr & MICROBLAZE_MSR_DZO ) ? "DZO " : "",
+ ( ctx->msr & MICROBLAZE_MSR_ICE ) ? "ICE " : "",
+ ( ctx->msr & MICROBLAZE_MSR_FSL ) ? "FSL " : "",
+ ( ctx->msr & MICROBLAZE_MSR_BIP ) ? "BiP " : "",
+ ( ctx->msr & MICROBLAZE_MSR_C ) ? "C " : "",
+ ( ctx->msr & MICROBLAZE_MSR_IE ) ? "IE " : ""
+ );
}
void _CPU_ISR_Set_level( uint32_t level )
@@ -119,3 +177,30 @@ void *_CPU_Thread_Idle_body( uintptr_t ignored )
__asm__ volatile ( "sleep" );
}
}
+
+CPU_Exception_handler installed_exception_handler = NULL;
+
+void _CPU_Exception_install_handler(
+ CPU_Exception_handler new_handler,
+ CPU_Exception_handler *old_handler
+)
+{
+ if ( old_handler != NULL ) {
+ *old_handler = installed_exception_handler;
+ }
+
+ installed_exception_handler = new_handler;
+}
+
+void _CPU_Exception_handle( CPU_Exception_frame *ef )
+{
+ /* EiP is not set for user exceptions which are unused and not hooked */
+ if (
+ ( ef->msr & MICROBLAZE_MSR_EIP ) != 0
+ && installed_exception_handler != NULL
+ ) {
+ installed_exception_handler( ef );
+ }
+
+ rtems_fatal( RTEMS_FATAL_SOURCE_EXCEPTION, (rtems_fatal_code) ef );
+}
diff --git a/cpukit/score/cpu/microblaze/cpu_asm.S b/cpukit/score/cpu/microblaze/cpu_asm.S
index d095e62f69..92cf15e901 100644
--- a/cpukit/score/cpu/microblaze/cpu_asm.S
+++ b/cpukit/score/cpu/microblaze/cpu_asm.S
@@ -54,9 +54,6 @@ _ISR_Handler:
swi r15, r1, MICROBLAZE_INTERRUPT_FRAME_R15
swi r18, r1, MICROBLAZE_INTERRUPT_FRAME_R18
- xori r3, r5, 0xFFFF
- beqi r3, do_exception
-
/* Disable dispatching */
lwi r3, r0, _Per_CPU_Information + 16
addik r3, r3, 1
@@ -182,13 +179,3 @@ thread_dispatch:
addik r1, r1, 52
bri quick_exit
-
-do_exception:
- /* exception no longer in progress */
- mfs r3, rmsr
- andni r3, r3, 0x200
- mts rmsr, r3
- addi r5, r0, 9
- add r6, r0, r1
-
- brai _Terminate
diff --git a/cpukit/score/cpu/microblaze/include/rtems/score/cpu.h b/cpukit/score/cpu/microblaze/include/rtems/score/cpu.h
index 4b11625463..91839a18ab 100644
--- a/cpukit/score/cpu/microblaze/include/rtems/score/cpu.h
+++ b/cpukit/score/cpu/microblaze/include/rtems/score/cpu.h
@@ -65,6 +65,44 @@
#define CPU_MODES_INTERRUPT_MASK 0x00000001
+#define MICROBLAZE_EXCEPTION_FRAME_R1 0
+#define MICROBLAZE_EXCEPTION_FRAME_R2 4
+#define MICROBLAZE_EXCEPTION_FRAME_R3 8
+#define MICROBLAZE_EXCEPTION_FRAME_R4 12
+#define MICROBLAZE_EXCEPTION_FRAME_R5 16
+#define MICROBLAZE_EXCEPTION_FRAME_R6 20
+#define MICROBLAZE_EXCEPTION_FRAME_R7 24
+#define MICROBLAZE_EXCEPTION_FRAME_R8 28
+#define MICROBLAZE_EXCEPTION_FRAME_R9 32
+#define MICROBLAZE_EXCEPTION_FRAME_R10 36
+#define MICROBLAZE_EXCEPTION_FRAME_R11 40
+#define MICROBLAZE_EXCEPTION_FRAME_R12 44
+#define MICROBLAZE_EXCEPTION_FRAME_R13 48
+#define MICROBLAZE_EXCEPTION_FRAME_R14 52
+#define MICROBLAZE_EXCEPTION_FRAME_R15 56
+#define MICROBLAZE_EXCEPTION_FRAME_R16 60
+#define MICROBLAZE_EXCEPTION_FRAME_R17 64
+#define MICROBLAZE_EXCEPTION_FRAME_R18 68
+#define MICROBLAZE_EXCEPTION_FRAME_R19 72
+#define MICROBLAZE_EXCEPTION_FRAME_R20 76
+#define MICROBLAZE_EXCEPTION_FRAME_R21 80
+#define MICROBLAZE_EXCEPTION_FRAME_R22 84
+#define MICROBLAZE_EXCEPTION_FRAME_R23 88
+#define MICROBLAZE_EXCEPTION_FRAME_R24 92
+#define MICROBLAZE_EXCEPTION_FRAME_R25 96
+#define MICROBLAZE_EXCEPTION_FRAME_R26 100
+#define MICROBLAZE_EXCEPTION_FRAME_R27 104
+#define MICROBLAZE_EXCEPTION_FRAME_R28 108
+#define MICROBLAZE_EXCEPTION_FRAME_R29 112
+#define MICROBLAZE_EXCEPTION_FRAME_R30 116
+#define MICROBLAZE_EXCEPTION_FRAME_R31 120
+#define MICROBLAZE_EXCEPTION_FRAME_MSR 124
+#define MICROBLAZE_EXCEPTION_FRAME_EAR 128
+#define MICROBLAZE_EXCEPTION_FRAME_ESR 132
+#define MICROBLAZE_EXCEPTION_FRAME_BTR 136
+
+#define CPU_EXCEPTION_FRAME_SIZE 140
+
#ifndef ASM
#ifdef __cplusplus
@@ -139,8 +177,23 @@ typedef struct {
#define CPU_INTERRUPT_STACK_ALIGNMENT CPU_CACHE_LINE_BYTES
-#define MICROBLAZE_MSR_IE (1 << 1)
-#define MICROBLAZE_MSR_EE (1 << 8)
+/*
+ * bit definitions in the documentation are reversed for all special registers
+ * such that bit 0 is the most significant bit
+ */
+#define MICROBLAZE_MSR_VM ( 1 << 13 )
+#define MICROBLAZE_MSR_UM ( 1 << 11 )
+#define MICROBLAZE_MSR_PVR ( 1 << 10 )
+#define MICROBLAZE_MSR_EIP ( 1 << 9 )
+#define MICROBLAZE_MSR_EE ( 1 << 8 )
+#define MICROBLAZE_MSR_DCE ( 1 << 7 )
+#define MICROBLAZE_MSR_DZO ( 1 << 6 )
+#define MICROBLAZE_MSR_ICE ( 1 << 5 )
+#define MICROBLAZE_MSR_FSL ( 1 << 4 )
+#define MICROBLAZE_MSR_BIP ( 1 << 3 )
+#define MICROBLAZE_MSR_C ( 1 << 2 )
+#define MICROBLAZE_MSR_IE ( 1 << 1 )
+
#define _CPU_MSR_GET( _msr_value ) \
do { \
@@ -228,8 +281,42 @@ void _CPU_Context_Initialize(
#define CPU_PER_CPU_CONTROL_SIZE 0
typedef struct {
- /* TODO: enumerate registers */
- uint32_t r[32];
+ /* r0 is unnecessary since it is always 0 */
+ uint32_t r1;
+ uint32_t r2;
+ uint32_t r3; /* return 1/scratch */
+ uint32_t r4; /* return 2/scratch */
+ uint32_t r5; /* param 1/scratch */
+ uint32_t r6; /* param 2/scratch */
+ uint32_t r7; /* param 3/scratch */
+ uint32_t r8; /* param 4/scratch */
+ uint32_t r9; /* param 5/scratch */
+ uint32_t r10; /* param 6/scratch */
+ uint32_t r11; /* scratch */
+ uint32_t r12; /* scratch */
+ uint32_t r13;
+ uint32_t *r14; /* Interrupt Link Register */
+ uint32_t *r15; /* Link Register */
+ uint32_t *r16; /* Trap/Debug Link Register */
+ uint32_t *r17; /* Exception Link Register */
+ uint32_t r18;
+ uint32_t r19;
+ uint32_t r20;
+ uint32_t r21;
+ uint32_t r22;
+ uint32_t r23;
+ uint32_t r24;
+ uint32_t r25;
+ uint32_t r26;
+ uint32_t r27;
+ uint32_t r28;
+ uint32_t r29;
+ uint32_t r30;
+ uint32_t r31;
+ uint32_t msr; /* Machine Status Register */
+ uint32_t *ear; /* Exception Address Register */
+ uint32_t esr; /* Exception Status Register */
+ uint32_t *btr; /* Branch Target Register */
} CPU_Exception_frame;
/* end of Priority handler macros */
@@ -246,6 +333,17 @@ void _CPU_ISR_install_vector(
CPU_ISR_handler *old_handler
);
+typedef void ( *CPU_Exception_handler )( CPU_Exception_frame *ef );
+
+void _CPU_Exception_install_handler(
+ CPU_Exception_handler new_handler,
+ CPU_Exception_handler *old_handler
+);
+
+void _CPU_Exception_handle(
+ CPU_Exception_frame *ef
+);
+
void _CPU_Context_switch(
Context_Control *run,
Context_Control *heir
diff --git a/spec/build/bsps/microblaze/microblaze_fpga/obj.yml b/spec/build/bsps/microblaze/microblaze_fpga/obj.yml
index a211456e1d..0635a06f0c 100644
--- a/spec/build/bsps/microblaze/microblaze_fpga/obj.yml
+++ b/spec/build/bsps/microblaze/microblaze_fpga/obj.yml
@@ -25,7 +25,6 @@ source:
- bsps/microblaze/microblaze_fpga/console/debug-io.c
- bsps/microblaze/microblaze_fpga/irq/irq.c
- bsps/microblaze/microblaze_fpga/start/_exception_handler.S
-- bsps/microblaze/microblaze_fpga/start/_hw_exception_handler.S
- bsps/microblaze/microblaze_fpga/start/_interrupt_handler.S
- bsps/microblaze/microblaze_fpga/start/bspreset.c
- bsps/microblaze/microblaze_fpga/start/bspstart.c
--
2.30.2
More information about the devel
mailing list