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a7d7297577
Writing wrong key to FLASH_KEYR locks entire flash and effectively
performs RW_NOW. Therefore we can use this and remove RW_AT_BOOT to
prevent having to reboot for RW to be protected.
BUG=chrome-os-partner:12043
TEST=1. fakewp 1 -> wp_gpio_asserted
2. flashwp now -> nothing happens
2. flashwp enable -> wp_gpio_asserted ro_at_boot
3. reboot -> wp_gpio_asserted ro_at_boot ro_now
4. flasherase 0x10000 0x1000 -> success
5. flashwp now -> wp_gpio_asserted ro_at_boot ro_now rw_now
6. flasherase 0x10000 0x1000 -> error
7. reboot -> wp_gpio_asserted ro_at_boot ro_now
8. flasherase 0x10000 0x1000 -> success
Change-Id: I22df188e31404c190c5830c6d94c9646224eb9ab
Reviewed-on: https://gerrit.chromium.org/gerrit/29255
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Ready: Vic Yang <victoryang@chromium.org>
Tested-by: Vic Yang <victoryang@chromium.org>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/* 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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* Panic handling, including displaying a message on the panic reporting
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* device, which is currently the UART.
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*/
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#ifndef __PANIC_H
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#include <stdarg.h>
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/**
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* Write a character to the panic reporting device
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*
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* This function will not return until the character has left the UART
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* data register. Any previously queued UART traffic is displayed first.
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*
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* @param ch Character to write
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*/
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void panic_putc(int ch);
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/**
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* Write a string to the panic reporting device
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*
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* This function will not return until the string has left the UART
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* data register. Any previously queued UART traffic is displayed first.
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*
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* @param ch Character to write
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*/
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void panic_puts(const char *s);
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/**
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* Very basic vprintf() for use in panic situations
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*
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* We only support %s and %nx where n is the number of hex digits to display.
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* Currently we don't even support %d, and it is aimed at small code size.
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*
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* TODO(sjg@chromium.org): Really what we need is a vsnprintf() that is
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* shared between the console UART and panic (and is also available as an
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* snprintf()). The only downside is that we would then require a large
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* printf() implementation to be always present, whereas presumably now we
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* can turn it off.
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*
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* @param format printf-style format string
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* @param args List of arguments to process
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*/
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void panic_vprintf(const char *format, va_list args);
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/**
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* Very basic printf() for use in panic situations
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*
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* See panic_vprintf() for full details
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*
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* @param format printf-style format string
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* @param ... Arguments to process
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*/
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void panic_printf(const char *format, ...);
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/**
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* Report an assertion failure and reset
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*
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* @param msg Assertion expression or other message
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* @param func Function name where assertion happened
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* @param fname File name where assertion happened
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* @param linenum Line number where assertion happened
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*/
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void panic_assert_fail(const char *msg, const char *func, const char *fname,
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int linenum);
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/**
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* Display a panic message and reset
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*
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* @param msg Panic message
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*/
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void panic(const char *msg);
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/**
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* Report a panic to the panic reporting device
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*
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* This is exported only to permit use from assembler.
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*
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* @param msg Panic message
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* @param lregs Registers from the exception: psp, ipsr, lr, r4-r11
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*/
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void report_panic(const char *msg, uint32_t *lregs);
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/**
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* Enable/disable bus fault handler
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*
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* @param ignored Non-zero if ignoring bus fault
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*/
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void ignore_bus_fault(int ignored);
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#endif
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