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generic-loader: Add a generic loader

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Add a generic loader to QEMU which can be used to load images or set
memory values.

Internally inside QEMU this is a device. It is a strange device that
provides no hardware interface but allows QEMU to monkey patch memory
specified when it is created. To be able to do this it has a reset
callback that does the memory operations.

This device allows the user to monkey patch memory. To be able to do
this it needs a backend to manage the datas, the same as other
memory-related devices. In this case as the backend is so trivial we
have merged it with the frontend instead of creating and maintaining a
seperate backend.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-id: 10f2a9dce5e5e11b6c6d959415b0ad6ee22bcba5.1475195078.git.alistair.francis@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alistair Francis 2016-10-04 13:28:09 +01:00 • committed by Peter Maydell
parent 13e5c54d30
commit e481a1f63c
4 changed files with 265 additions and 0 deletions
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46
include/hw/core/generic-loader.h Normal file
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/*
* Generic Loader
*
* Copyright (C) 2014 Li Guang
* Written by Li Guang <lig.fnst@cn.fujitsu.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef GENERIC_LOADER_H
#define GENERIC_LOADER_H
#include "elf.h"
typedef struct GenericLoaderState {
/* <private> */
DeviceState parent_obj;
/* <public> */
CPUState *cpu;
uint64_t addr;
uint64_t data;
uint8_t data_len;
uint32_t cpu_num;
char *file;
bool force_raw;
bool data_be;
bool set_pc;
} GenericLoaderState;
#define TYPE_GENERIC_LOADER "loader"
#define GENERIC_LOADER(obj) OBJECT_CHECK(GenericLoaderState, (obj), \
TYPE_GENERIC_LOADER)
#endif