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031143c8d5
qemu-e2k/hw/xtensa/xtfpga.c
Peter Crosthwaite 7ef295ea5b loader: Add data swap option to load-elf 
Some CPUs are of an opposite data-endianness to other components in the
system. Sometimes elfs have the data sections layed out with this CPU
data-endianness accounting for when loaded via the CPU, so byte swaps
(relative to other system components) will occur.

The leading example, is ARM's BE32 mode, which is is basically LE with
address manipulation on half-word and byte accesses to access the
hw/byte reversed address. This means that word data is invariant
across LE and BE32. This also means that instructions are still LE.
The expectation is that the elf will be loaded via the CPU in this
endianness scheme, which means the data in the elf is reversed at
compile time.

As QEMU loads via the system memory directly, rather than the CPU, we
need a mechanism to reverse elf data endianness to implement this
possibility.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04 11:30:21 +00:00

514 lines
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/*
* 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 "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "elf.h"
#include "exec/memory.h"
#include "exec/address-spaces.h"
#include "hw/char/serial.h"
#include "net/net.h"
#include "hw/sysbus.h"
#include "hw/block/flash.h"
#include "sysemu/block-backend.h"
#include "sysemu/char.h"
#include "sysemu/device_tree.h"
#include "qemu/error-report.h"
#include "bootparam.h"
typedef struct LxBoardDesc {
hwaddr flash_base;
size_t flash_size;
size_t flash_boot_base;
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, hwaddr 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, hwaddr 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,
hwaddr base)
{
Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
memory_region_init_io(&s->iomem, NULL, &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,
hwaddr base,
hwaddr descriptors,
hwaddr 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 = SYS_BUS_DEVICE(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, OBJECT(s), "open_eth.ram", 16384,
&error_fatal);
vmstate_register_ram_global(ram);
memory_region_add_subregion(address_space, buffers, ram);
}
static pflash_t *xtfpga_flash_init(MemoryRegion *address_space,
const LxBoardDesc *board,
DriveInfo *dinfo, int be)
{
SysBusDevice *s;
DeviceState *dev = qdev_create(NULL, "cfi.pflash01");
qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(dinfo),
&error_abort);
qdev_prop_set_uint32(dev, "num-blocks",
board->flash_size / board->flash_sector_size);
qdev_prop_set_uint64(dev, "sector-length", board->flash_sector_size);
qdev_prop_set_uint8(dev, "width", 4);
qdev_prop_set_bit(dev, "big-endian", be);
qdev_prop_set_string(dev, "name", "lx60.io.flash");
qdev_init_nofail(dev);
s = SYS_BUS_DEVICE(dev);
memory_region_add_subregion(address_space, board->flash_base,
sysbus_mmio_get_region(s, 0));
return OBJECT_CHECK(pflash_t, (dev), "cfi.pflash01");
}
static uint64_t translate_phys_addr(void *opaque, uint64_t addr)
{
XtensaCPU *cpu = opaque;
return cpu_get_phys_page_debug(CPU(cpu), addr);
}
static void lx60_reset(void *opaque)
{
XtensaCPU *cpu = opaque;
cpu_reset(CPU(cpu));
}
static uint64_t lx60_io_read(void *opaque, hwaddr addr,
unsigned size)
{
return 0;
}
static void lx60_io_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
}
static const MemoryRegionOps lx60_io_ops = {
.read = lx60_io_read,
.write = lx60_io_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void lx_init(const LxBoardDesc *board, MachineState *machine)
{
#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;
QemuOpts *machine_opts = qemu_get_machine_opts();
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = qemu_opt_get(machine_opts, "kernel");
const char *kernel_cmdline = qemu_opt_get(machine_opts, "append");
const char *dtb_filename = qemu_opt_get(machine_opts, "dtb");
const char *initrd_filename = qemu_opt_get(machine_opts, "initrd");
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) {
error_report("unable to find CPU definition '%s'",
cpu_model);
exit(EXIT_FAILURE);
}
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, NULL, "lx60.dram", machine->ram_size,
&error_fatal);
vmstate_register_ram_global(ram);
memory_region_add_subregion(system_memory, 0, ram);
system_io = g_malloc(sizeof(*system_io));
memory_region_init_io(system_io, NULL, &lx60_io_ops, NULL, "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 = xtfpga_flash_init(system_io, board, dinfo, be);
}
/* Use presence of kernel file name as 'boot from SRAM' switch. */
if (kernel_filename) {
uint32_t entry_point = env->pc;
size_t bp_size = 3 * get_tag_size(0); /* first/last and memory tags */
uint32_t tagptr = 0xfe000000 + board->sram_size;
uint32_t cur_tagptr;
BpMemInfo memory_location = {
.type = tswap32(MEMORY_TYPE_CONVENTIONAL),
.start = tswap32(0),
.end = tswap32(machine->ram_size),
};
uint32_t lowmem_end = machine->ram_size < 0x08000000 ?
machine->ram_size : 0x08000000;
uint32_t cur_lowmem = QEMU_ALIGN_UP(lowmem_end / 2, 4096);
rom = g_malloc(sizeof(*rom));
memory_region_init_ram(rom, NULL, "lx60.sram", board->sram_size,
&error_fatal);
vmstate_register_ram_global(rom);
memory_region_add_subregion(system_memory, 0xfe000000, rom);
if (kernel_cmdline) {
bp_size += get_tag_size(strlen(kernel_cmdline) + 1);
}
if (dtb_filename) {
bp_size += get_tag_size(sizeof(uint32_t));
}
if (initrd_filename) {
bp_size += get_tag_size(sizeof(BpMemInfo));
}
/* Put kernel bootparameters to the end of that SRAM */
tagptr = (tagptr - bp_size) & ~0xff;
cur_tagptr = put_tag(tagptr, BP_TAG_FIRST, 0, NULL);
cur_tagptr = put_tag(cur_tagptr, BP_TAG_MEMORY,
sizeof(memory_location), &memory_location);
if (kernel_cmdline) {
cur_tagptr = put_tag(cur_tagptr, BP_TAG_COMMAND_LINE,
strlen(kernel_cmdline) + 1, kernel_cmdline);
}
if (dtb_filename) {
int fdt_size;
void *fdt = load_device_tree(dtb_filename, &fdt_size);
uint32_t dtb_addr = tswap32(cur_lowmem);
if (!fdt) {
error_report("could not load DTB '%s'", dtb_filename);
exit(EXIT_FAILURE);
}
cpu_physical_memory_write(cur_lowmem, fdt, fdt_size);
cur_tagptr = put_tag(cur_tagptr, BP_TAG_FDT,
sizeof(dtb_addr), &dtb_addr);
cur_lowmem = QEMU_ALIGN_UP(cur_lowmem + fdt_size, 4096);
}
if (initrd_filename) {
BpMemInfo initrd_location = { 0 };
int initrd_size = load_ramdisk(initrd_filename, cur_lowmem,
lowmem_end - cur_lowmem);
if (initrd_size < 0) {
initrd_size = load_image_targphys(initrd_filename,
cur_lowmem,
lowmem_end - cur_lowmem);
}
if (initrd_size < 0) {
error_report("could not load initrd '%s'", initrd_filename);
exit(EXIT_FAILURE);
}
initrd_location.start = tswap32(cur_lowmem);
initrd_location.end = tswap32(cur_lowmem + initrd_size);
cur_tagptr = put_tag(cur_tagptr, BP_TAG_INITRD,
sizeof(initrd_location), &initrd_location);
cur_lowmem = QEMU_ALIGN_UP(cur_lowmem + initrd_size, 4096);
}
cur_tagptr = put_tag(cur_tagptr, BP_TAG_LAST, 0, NULL);
env->regs[2] = tagptr;
uint64_t elf_entry;
uint64_t elf_lowaddr;
int success = load_elf(kernel_filename, translate_phys_addr, cpu,
&elf_entry, &elf_lowaddr, NULL, be, EM_XTENSA, 0, 0);
if (success > 0) {
entry_point = elf_entry;
} else {
hwaddr ep;
int is_linux;
success = load_uimage(kernel_filename, &ep, NULL, &is_linux,
translate_phys_addr, cpu);
if (success > 0 && is_linux) {
entry_point = ep;
} else {
error_report("could not load kernel '%s'",
kernel_filename);
exit(EXIT_FAILURE);
}
}
if (entry_point != env->pc) {
static const uint8_t jx_a0[] = {
#ifdef TARGET_WORDS_BIGENDIAN
0x0a, 0, 0,
#else
0xa0, 0, 0,
#endif
};
env->regs[0] = entry_point;
cpu_physical_memory_write(env->pc, jx_a0, sizeof(jx_a0));
}
} 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, NULL, "lx60.flash",
flash_mr, board->flash_boot_base,
board->flash_size - board->flash_boot_base < 0x02000000 ?
board->flash_size - board->flash_boot_base : 0x02000000);
memory_region_add_subregion(system_memory, 0xfe000000,
flash_io);
}
}
}
static void xtensa_lx60_init(MachineState *machine)
{
static const LxBoardDesc lx60_board = {
.flash_base = 0x08000000,
.flash_size = 0x00400000,
.flash_sector_size = 0x10000,
.sram_size = 0x20000,
};
lx_init(&lx60_board, machine);
}
static void xtensa_lx200_init(MachineState *machine)
{
static const LxBoardDesc lx200_board = {
.flash_base = 0x08000000,
.flash_size = 0x01000000,
.flash_sector_size = 0x20000,
.sram_size = 0x2000000,
};
lx_init(&lx200_board, machine);
}
static void xtensa_ml605_init(MachineState *machine)
{
static const LxBoardDesc ml605_board = {
.flash_base = 0x08000000,
.flash_size = 0x01000000,
.flash_sector_size = 0x20000,
.sram_size = 0x2000000,
};
lx_init(&ml605_board, machine);
}
static void xtensa_kc705_init(MachineState *machine)
{
static const LxBoardDesc kc705_board = {
.flash_base = 0x00000000,
.flash_size = 0x08000000,
.flash_boot_base = 0x06000000,
.flash_sector_size = 0x20000,
.sram_size = 0x2000000,
};
lx_init(&kc705_board, machine);
}
static void xtensa_lx60_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")";
mc->init = xtensa_lx60_init;
mc->max_cpus = 4;
}
static const TypeInfo xtensa_lx60_type = {
.name = MACHINE_TYPE_NAME("lx60"),
.parent = TYPE_MACHINE,
.class_init = xtensa_lx60_class_init,
};
static void xtensa_lx200_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")";
mc->init = xtensa_lx200_init;
mc->max_cpus = 4;
}
static const TypeInfo xtensa_lx200_type = {
.name = MACHINE_TYPE_NAME("lx200"),
.parent = TYPE_MACHINE,
.class_init = xtensa_lx200_class_init,
};
static void xtensa_ml605_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "ml605 EVB (" XTENSA_DEFAULT_CPU_MODEL ")";
mc->init = xtensa_ml605_init;
mc->max_cpus = 4;
}
static const TypeInfo xtensa_ml605_type = {
.name = MACHINE_TYPE_NAME("ml605"),
.parent = TYPE_MACHINE,
.class_init = xtensa_ml605_class_init,
};
static void xtensa_kc705_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "kc705 EVB (" XTENSA_DEFAULT_CPU_MODEL ")";
mc->init = xtensa_kc705_init;
mc->max_cpus = 4;
}
static const TypeInfo xtensa_kc705_type = {
.name = MACHINE_TYPE_NAME("kc705"),
.parent = TYPE_MACHINE,
.class_init = xtensa_kc705_class_init,
};
static void xtensa_lx_machines_init(void)
{
type_register_static(&xtensa_lx60_type);
type_register_static(&xtensa_lx200_type);
type_register_static(&xtensa_ml605_type);
type_register_static(&xtensa_kc705_type);
}
machine_init(xtensa_lx_machines_init)
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