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d5cb026142
These likely indicate errors, so we shold trap them. Possibly this should be reconsidered for production. BUG=chrome-os-partner:10148 TEST=manual: build on all boards build and boot on snow with a special rw command containing a division by 0. See that it is trapped: > rw 0 === EXCEPTION: 03 ====== xPSR: 01000000 =========== r0 :0000000b r1 :08005eba r2 :00000000 r3 :20001048 r4 :00000000 r5 :08004fd4 r6 :08004f8c r7 :200012a8 r8 :08004fd4 r9 :00000002 r10:00000000 r11:00000000 r12:00000000 sp :200009a0 lr :08002861 pc :0800368a Divide by 0, Forced hard fault, Vector catch mmfs = 02000000, shcsr = 00000000, hfsr = 40000000, dfsr = 00000008 Turn off the cpu_init() setup, and see that it is ignored. > rw 0 read 0x0 = 0x00000000 > Similarly, try an unaligned access with the rw command with this enabled: > rw 1 === EXCEPTION: 03 ====== xPSR: 01000000 =========== r0 :0000000b r1 :00000041 r2 :00000001 r3 :200012ac r4 :00000000 r5 :08004fd4 r6 :08004f8c r7 :200012a8 r8 :08004fd4 r9 :00000002 r10:00000000 r11:00000000 r12:00000000 sp :200009a0 lr :08002861 pc :08003686 Unaligned, Forced hard fault, Vector catch mmfs = 01000000, shcsr = 00000000, hfsr = 40000000, dfsr = 00000008 but disabled it works: > rw 1 read 0x1 = 0x5d200010 > Change-Id: Id84f737301e467b3b56a7ac22790e55d672df7d8 Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/25410 Reviewed-by: Randall Spangler <rspangler@chromium.org>
19 lines
548 B
Makefile
19 lines
548 B
Makefile
# -*- makefile -*-
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# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Cortex-M4 core OS files build
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#
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# FPU compilation flags
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CFLAGS_FPU-$(CONFIG_FPU)=-mfpu=fpv4-sp-d16 -mfloat-abi=hard
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# CPU specific compilation flags
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CFLAGS_CPU=-mcpu=cortex-m4 -mthumb -Os -mno-sched-prolog
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CFLAGS_CPU+=$(CFLAGS_FPU-y)
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core-y=cpu.o init.o panic.o switch.o task.o timer.o
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core-$(CONFIG_FPU)+=fpu.o
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core-$(CONFIG_TASK_WATCHDOG)+=watchdog.o
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