/* * PowerMac NVRAM emulation * * Copyright (c) 2005-2007 Fabrice Bellard * Copyright (c) 2007 Jocelyn Mayer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */#include "hw.h"#include "ppc_mac.h"struct MacIONVRAMState {    target_phys_addr_t mem_base;    target_phys_addr_t size;    int mem_index;    uint8_t data[0x2000];};/* Direct access to NVRAM */uint32_t macio_nvram_read (void *opaque, uint32_t addr){    MacIONVRAMState *s = opaque;    uint32_t ret;    //    printf("%s: %p addr %04x\n", __func__, s, addr);    if (addr < 0x2000)        ret = s->data[addr];    else        ret = -1;    return ret;}void macio_nvram_write (void *opaque, uint32_t addr, uint32_t val){    MacIONVRAMState *s = opaque;    //    printf("%s: %p addr %04x val %02x\n", __func__, s, addr, val);    if (addr < 0x2000)        s->data[addr] = val;}/* macio style NVRAM device */static void macio_nvram_writeb (void *opaque,                                target_phys_addr_t addr, uint32_t value){    MacIONVRAMState *s = opaque;    addr -= s->mem_base;    addr = (addr >> 4) & 0x1fff;    s->data[addr] = value;    //    printf("macio_nvram_writeb %04x = %02x\n", addr, value);}static uint32_t macio_nvram_readb (void *opaque, target_phys_addr_t addr){    MacIONVRAMState *s = opaque;    uint32_t value;    addr -= s->mem_base;    addr = (addr >> 4) & 0x1fff;    value = s->data[addr];    //    printf("macio_nvram_readb %04x = %02x\n", addr, value);    return value;}static CPUWriteMemoryFunc *nvram_write[] = {    &macio_nvram_writeb,    &macio_nvram_writeb,    &macio_nvram_writeb,};static CPUReadMemoryFunc *nvram_read[] = {    &macio_nvram_readb,    &macio_nvram_readb,    &macio_nvram_readb,};MacIONVRAMState *macio_nvram_init (int *mem_index, target_phys_addr_t size){    MacIONVRAMState *s;    s = qemu_mallocz(sizeof(MacIONVRAMState));    if (!s)        return NULL;    s->size = size;    s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s);    *mem_index = s->mem_index;    return s;}void macio_nvram_map (void *opaque, target_phys_addr_t mem_base){    MacIONVRAMState *s;    s = opaque;    s->mem_base = mem_base;    cpu_register_physical_memory(mem_base, s->size, s->mem_index);}static uint8_t nvram_chksum (const uint8_t *buf, int n){    int sum, i;    sum = 0;    for(i = 0; i < n; i++)        sum += buf[i];    return (sum & 0xff) + (sum >> 8);}/* set a free Mac OS NVRAM partition */void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len){    uint8_t *buf;    char partition_name[12] = "wwwwwwwwwwww";    buf = nvr->data;    buf[0] = 0x7f; /* free partition magic */    buf[1] = 0; /* checksum */    buf[2] = len >> 8;    buf[3] = len;    memcpy(buf + 4, partition_name, 12);    buf[1] = nvram_chksum(buf, 16);}