symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/ds1225y.c
author Mike Kinghan <mikek@symbian.org>
Wed, 04 Aug 2010 10:56:22 +0100
branchGCC_SURGE
changeset 91 07b904f40417
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Provisional fix for bug 3508 - Persistent storage support breaks Linux compatibility. Enables libnvmemmory.so to be built and dynamically linked on Linux and rom boot reports persistent storage image created OK, but ROM then crashes.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * QEMU NVRAM emulation for DS1225Y chip
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 *
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 * Copyright (c) 2007-2008 Hervé Poussineau
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#include "hw.h"
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#include "mips.h"
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#include "nvram.h"
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//#define DEBUG_NVRAM
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typedef struct ds1225y_t
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{
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    uint32_t chip_size;
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    QEMUFile *file;
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    uint8_t *contents;
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    uint8_t protection;
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} ds1225y_t;
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static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)
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{
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    ds1225y_t *s = opaque;
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    uint32_t val;
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    val = s->contents[addr];
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#ifdef DEBUG_NVRAM
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    printf("nvram: read 0x%x at " TARGET_FMT_lx "\n", val, addr);
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#endif
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    return val;
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}
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static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)
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{
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    uint32_t v;
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    v = nvram_readb(opaque, addr);
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    v |= nvram_readb(opaque, addr + 1) << 8;
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    return v;
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}
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static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)
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{
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    uint32_t v;
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    v = nvram_readb(opaque, addr);
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    v |= nvram_readb(opaque, addr + 1) << 8;
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    v |= nvram_readb(opaque, addr + 2) << 16;
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    v |= nvram_readb(opaque, addr + 3) << 24;
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    return v;
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}
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static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t val)
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{
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    ds1225y_t *s = opaque;
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#ifdef DEBUG_NVRAM
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    printf("nvram: write 0x%x at " TARGET_FMT_lx "\n", val, addr);
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#endif
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    s->contents[addr] = val & 0xff;
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    if (s->file) {
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        qemu_fseek(s->file, addr, SEEK_SET);
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        qemu_put_byte(s->file, (int)val);
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        qemu_fflush(s->file);
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    }
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}
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static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t val)
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{
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    nvram_writeb(opaque, addr, val & 0xff);
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    nvram_writeb(opaque, addr + 1, (val >> 8) & 0xff);
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}
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static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t val)
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{
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    nvram_writeb(opaque, addr, val & 0xff);
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    nvram_writeb(opaque, addr + 1, (val >> 8) & 0xff);
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    nvram_writeb(opaque, addr + 2, (val >> 16) & 0xff);
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    nvram_writeb(opaque, addr + 3, (val >> 24) & 0xff);
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}
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static void nvram_writeb_protected (void *opaque, target_phys_addr_t addr, uint32_t val)
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{
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    ds1225y_t *s = opaque;
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    if (s->protection != 7) {
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#ifdef DEBUG_NVRAM
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    printf("nvram: prevent write of 0x%x at " TARGET_FMT_lx "\n", val, addr);
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#endif
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        return;
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    }
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    nvram_writeb(opaque, addr, val);
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}
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static void nvram_writew_protected (void *opaque, target_phys_addr_t addr, uint32_t val)
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{
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    nvram_writeb_protected(opaque, addr, val & 0xff);
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martin.trojer@nokia.com
parents:
diff changeset
   118
    nvram_writeb_protected(opaque, addr + 1, (val >> 8) & 0xff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   119
}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   120
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   121
static void nvram_writel_protected (void *opaque, target_phys_addr_t addr, uint32_t val)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   122
{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   123
    nvram_writeb_protected(opaque, addr, val & 0xff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   124
    nvram_writeb_protected(opaque, addr + 1, (val >> 8) & 0xff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   125
    nvram_writeb_protected(opaque, addr + 2, (val >> 16) & 0xff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   126
    nvram_writeb_protected(opaque, addr + 3, (val >> 24) & 0xff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   127
}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   128
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   129
static CPUReadMemoryFunc *nvram_read[] = {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   130
    &nvram_readb,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   131
    &nvram_readw,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   132
    &nvram_readl,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   133
};
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   134
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   135
static CPUWriteMemoryFunc *nvram_write[] = {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   136
    &nvram_writeb,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   137
    &nvram_writew,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   138
    &nvram_writel,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   139
};
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   140
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   141
static CPUWriteMemoryFunc *nvram_write_protected[] = {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   142
    &nvram_writeb_protected,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   143
    &nvram_writew_protected,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   144
    &nvram_writel_protected,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   145
};
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   146
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   147
/* Initialisation routine */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   148
void *ds1225y_init(target_phys_addr_t mem_base, const char *filename)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   149
{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   150
    ds1225y_t *s;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   151
    int mem_indexRW, mem_indexRP;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   152
    QEMUFile *file;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   153
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   154
    s = qemu_mallocz(sizeof(ds1225y_t));
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   155
    if (!s)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   156
        return NULL;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   157
    s->chip_size = 0x2000; /* Fixed for ds1225y chip: 8 KiB */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   158
    s->contents = qemu_mallocz(s->chip_size);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   159
    if (!s->contents) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   160
        return NULL;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   161
    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   162
    s->protection = 7;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   163
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   164
    /* Read current file */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   165
    file = qemu_fopen(filename, "rb");
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   166
    if (file) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   167
        /* Read nvram contents */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   168
        qemu_get_buffer(file, s->contents, s->chip_size);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   169
        qemu_fclose(file);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   170
    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   171
    s->file = qemu_fopen(filename, "wb");
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   172
    if (s->file) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   173
        /* Write back contents, as 'wb' mode cleaned the file */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   174
        qemu_put_buffer(s->file, s->contents, s->chip_size);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   175
        qemu_fflush(s->file);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   176
    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   177
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   178
    /* Read/write memory */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   179
    mem_indexRW = cpu_register_io_memory(0, nvram_read, nvram_write, s);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   180
    cpu_register_physical_memory(mem_base, s->chip_size, mem_indexRW);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   181
    /* Read/write protected memory */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   182
    mem_indexRP = cpu_register_io_memory(0, nvram_read, nvram_write_protected, s);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   183
    cpu_register_physical_memory(mem_base + s->chip_size, s->chip_size, mem_indexRP);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   184
    return s;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   185
}