/*
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "sysemu.h"
#include "boards.h"
#include "loader.h"
#include "elf.h"
#include "memory.h"
#include "exec-memory.h"
#include "pc.h"
#include "sysbus.h"
#include "flash.h"
#include "blockdev.h"
#include "xtensa_bootparam.h"
typedef struct LxBoardDesc {
size_t flash_size;
size_t flash_sector_size;
size_t sram_size;
} LxBoardDesc;
typedef struct Lx60FpgaState {
MemoryRegion iomem;
uint32_t leds;
uint32_t switches;
} Lx60FpgaState;
static void lx60_fpga_reset(void *opaque)
{
Lx60FpgaState *s = opaque;
s->leds = 0;
s->switches = 0;
}
static uint64_t lx60_fpga_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
Lx60FpgaState *s = opaque;
switch (addr) {
case 0x0: /*build date code*/
return 0x09272011;
case 0x4: /*processor clock frequency, Hz*/
return 10000000;
case 0x8: /*LEDs (off = 0, on = 1)*/
return s->leds;
case 0xc: /*DIP switches (off = 0, on = 1)*/
return s->switches;
}
return 0;
}
static void lx60_fpga_write(void *opaque, target_phys_addr_t addr,
uint64_t val, unsigned size)
{
Lx60FpgaState *s = opaque;
switch (addr) {
case 0x8: /*LEDs (off = 0, on = 1)*/
s->leds = val;
break;
case 0x10: /*board reset*/
if (val == 0xdead) {
qemu_system_reset_request();
}
break;
}
}
static const MemoryRegionOps lx60_fpga_ops = {
.read = lx60_fpga_read,
.write = lx60_fpga_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
target_phys_addr_t base)
{
Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,
"lx60.fpga", 0x10000);
memory_region_add_subregion(address_space, base, &s->iomem);
lx60_fpga_reset(s);
qemu_register_reset(lx60_fpga_reset, s);
return s;
}
static void lx60_net_init(MemoryRegion *address_space,
target_phys_addr_t base,
target_phys_addr_t descriptors,
target_phys_addr_t buffers,
qemu_irq irq, NICInfo *nd)
{
DeviceState *dev;
SysBusDevice *s;
MemoryRegion *ram;
dev = qdev_create(NULL, "open_eth");
qdev_set_nic_properties(dev, nd);
qdev_init_nofail(dev);
s = sysbus_from_qdev(dev);
sysbus_connect_irq(s, 0, irq);
memory_region_add_subregion(address_space, base,
sysbus_mmio_get_region(s, 0));
memory_region_add_subregion(address_space, descriptors,
sysbus_mmio_get_region(s, 1));
ram = g_malloc(sizeof(*ram));
memory_region_init_ram(ram, "open_eth.ram", 16384);
vmstate_register_ram_global(ram);
memory_region_add_subregion(address_space, buffers, ram);
}
static uint64_t translate_phys_addr(void *env, uint64_t addr)
{
return cpu_get_phys_page_debug(env, addr);
}
static void lx60_reset(void *opaque)
{
XtensaCPU *cpu = opaque;
cpu_reset(CPU(cpu));
}
static void lx_init(const LxBoardDesc *board,
ram_addr_t ram_size, const char *boot_device,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
#ifdef TARGET_WORDS_BIGENDIAN
int be = 1;
#else
int be = 0;
#endif
MemoryRegion *system_memory = get_system_memory();
XtensaCPU *cpu = NULL;
CPUXtensaState *env = NULL;
MemoryRegion *ram, *rom, *system_io;
DriveInfo *dinfo;
pflash_t *flash = NULL;
int n;
if (!cpu_model) {
cpu_model = XTENSA_DEFAULT_CPU_MODEL;
}
for (n = 0; n < smp_cpus; n++) {
cpu = cpu_xtensa_init(cpu_model);
if (cpu == NULL) {
fprintf(stderr, "Unable to find CPU definition\n");
exit(1);
}
env = &cpu->env;
env->sregs[PRID] = n;
qemu_register_reset(lx60_reset, cpu);
/* Need MMU initialized prior to ELF loading,
* so that ELF gets loaded into virtual addresses
*/
cpu_reset(CPU(cpu));
}
ram = g_malloc(sizeof(*ram));
memory_region_init_ram(ram, "lx60.dram", ram_size);
vmstate_register_ram_global(ram);
memory_region_add_subregion(system_memory, 0, ram);
system_io = g_malloc(sizeof(*system_io));
memory_region_init(system_io, "lx60.io", 224 * 1024 * 1024);
memory_region_add_subregion(system_memory, 0xf0000000, system_io);
lx60_fpga_init(system_io, 0x0d020000);
if (nd_table[0].used) {
lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
xtensa_get_extint(env, 1), nd_table);
}
if (!serial_hds[0]) {
serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
}
serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
dinfo = drive_get(IF_PFLASH, 0, 0);
if (dinfo) {
flash = pflash_cfi01_register(0xf8000000,
NULL, "lx60.io.flash", board->flash_size,
dinfo->bdrv, board->flash_sector_size,
board->flash_size / board->flash_sector_size,
4, 0x0000, 0x0000, 0x0000, 0x0000, be);
if (flash == NULL) {
fprintf(stderr, "Unable to mount pflash\n");
exit(1);
}
}
/* Use presence of kernel file name as 'boot from SRAM' switch. */
if (kernel_filename) {
rom = g_malloc(sizeof(*rom));
memory_region_init_ram(rom, "lx60.sram", board->sram_size);
vmstate_register_ram_global(rom);
memory_region_add_subregion(system_memory, 0xfe000000, rom);
/* Put kernel bootparameters to the end of that SRAM */
if (kernel_cmdline) {
size_t cmdline_size = strlen(kernel_cmdline) + 1;
size_t bp_size = sizeof(BpTag[4]) + cmdline_size;
uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;
env->regs[2] = tagptr;
tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);
if (cmdline_size > 1) {
tagptr = put_tag(tagptr, 0x1001,
cmdline_size, kernel_cmdline);
}
tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);
}
uint64_t elf_entry;
uint64_t elf_lowaddr;
int success = load_elf(kernel_filename, translate_phys_addr, env,
&elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
if (success > 0) {
env->pc = elf_entry;
}
} else {
if (flash) {
MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));
memory_region_init_alias(flash_io, "lx60.flash",
flash_mr, 0, board->flash_size);
memory_region_add_subregion(system_memory, 0xfe000000,
flash_io);
}
}
}
static void xtensa_lx60_init(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
static const LxBoardDesc lx60_board = {
.flash_size = 0x400000,
.flash_sector_size = 0x10000,
.sram_size = 0x20000,
};
lx_init(&lx60_board, ram_size, boot_device,
kernel_filename, kernel_cmdline,
initrd_filename, cpu_model);
}
static void xtensa_lx200_init(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
static const LxBoardDesc lx200_board = {
.flash_size = 0x1000000,
.flash_sector_size = 0x20000,
.sram_size = 0x2000000,
};
lx_init(&lx200_board, ram_size, boot_device,
kernel_filename, kernel_cmdline,
initrd_filename, cpu_model);
}
static QEMUMachine xtensa_lx60_machine = {
.name = "lx60",
.desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
.init = xtensa_lx60_init,
.max_cpus = 4,
};
static QEMUMachine xtensa_lx200_machine = {
.name = "lx200",
.desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
.init = xtensa_lx200_init,
.max_cpus = 4,
};
static void xtensa_lx_machines_init(void)
{
qemu_register_machine(&xtensa_lx60_machine);
qemu_register_machine(&xtensa_lx200_machine);
}
machine_init(xtensa_lx_machines_init);
