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qemu/hw/m68k/mcf5208.c

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/*
* Motorola ColdFire MCF5208 SoC emulation.
*
* Copyright (c) 2007 CodeSourcery.
*
* This code is licensed under the GPL
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/error-report.h"
#include "qemu/log.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/irq.h"
#include "hw/m68k/mcf.h"
#include "hw/m68k/mcf_fec.h"
#include "qemu/timer.h"
#include "hw/ptimer.h"
#include "sysemu/sysemu.h"
#include "sysemu/qtest.h"
#include "net/net.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "elf.h"
#include "exec/address-spaces.h"
#define SYS_FREQ 166666666
#define ROM_SIZE 0x200000
#define PCSR_EN 0x0001
#define PCSR_RLD 0x0002
#define PCSR_PIF 0x0004
#define PCSR_PIE 0x0008
#define PCSR_OVW 0x0010
#define PCSR_DBG 0x0020
#define PCSR_DOZE 0x0040
#define PCSR_PRE_SHIFT 8
#define PCSR_PRE_MASK 0x0f00
typedef struct {
MemoryRegion iomem;
qemu_irq irq;
ptimer_state *timer;
uint16_t pcsr;
uint16_t pmr;
uint16_t pcntr;
} m5208_timer_state;
static void m5208_timer_update(m5208_timer_state *s)
{
if ((s->pcsr & (PCSR_PIE | PCSR_PIF)) == (PCSR_PIE | PCSR_PIF))
qemu_irq_raise(s->irq);
else
qemu_irq_lower(s->irq);
}
static void m5208_timer_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
m5208_timer_state *s = (m5208_timer_state *)opaque;
int prescale;
int limit;
switch (offset) {
case 0:
/* The PIF bit is set-to-clear. */
if (value & PCSR_PIF) {
s->pcsr &= ~PCSR_PIF;
value &= ~PCSR_PIF;
}
/* Avoid frobbing the timer if we're just twiddling IRQ bits. */
if (((s->pcsr ^ value) & ~PCSR_PIE) == 0) {
s->pcsr = value;
m5208_timer_update(s);
return;
}
ptimer_transaction_begin(s->timer);
if (s->pcsr & PCSR_EN)
ptimer_stop(s->timer);
s->pcsr = value;
prescale = 1 << ((s->pcsr & PCSR_PRE_MASK) >> PCSR_PRE_SHIFT);
ptimer_set_freq(s->timer, (SYS_FREQ / 2) / prescale);
if (s->pcsr & PCSR_RLD)
limit = s->pmr;
else
limit = 0xffff;
ptimer_set_limit(s->timer, limit, 0);
if (s->pcsr & PCSR_EN)
ptimer_run(s->timer, 0);
ptimer_transaction_commit(s->timer);
break;
case 2:
ptimer_transaction_begin(s->timer);
s->pmr = value;
s->pcsr &= ~PCSR_PIF;
if ((s->pcsr & PCSR_RLD) == 0) {
if (s->pcsr & PCSR_OVW)
ptimer_set_count(s->timer, value);
} else {
ptimer_set_limit(s->timer, value, s->pcsr & PCSR_OVW);
}
ptimer_transaction_commit(s->timer);
break;
case 4:
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
__func__, offset);
return;
}
m5208_timer_update(s);
}
static void m5208_timer_trigger(void *opaque)
{
m5208_timer_state *s = (m5208_timer_state *)opaque;
s->pcsr |= PCSR_PIF;
m5208_timer_update(s);
}
static uint64_t m5208_timer_read(void *opaque, hwaddr addr,
unsigned size)
{
m5208_timer_state *s = (m5208_timer_state *)opaque;
switch (addr) {
case 0:
return s->pcsr;
case 2:
return s->pmr;
case 4:
return ptimer_get_count(s->timer);
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
__func__, addr);
return 0;
}
}
static const MemoryRegionOps m5208_timer_ops = {
.read = m5208_timer_read,
.write = m5208_timer_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static uint64_t m5208_sys_read(void *opaque, hwaddr addr,
unsigned size)
{
switch (addr) {
case 0x110: /* SDCS0 */
{
int n;
for (n = 0; n < 32; n++) {
if (ram_size < (2u << n))
break;
}
return (n - 1) | 0x40000000;
}
case 0x114: /* SDCS1 */
return 0;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
__func__, addr);
return 0;
}
}
static void m5208_sys_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
__func__, addr);
}
static const MemoryRegionOps m5208_sys_ops = {
.read = m5208_sys_read,
.write = m5208_sys_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void mcf5208_sys_init(MemoryRegion *address_space, qemu_irq *pic)
{
MemoryRegion *iomem = g_new(MemoryRegion, 1);
m5208_timer_state *s;
int i;
/* SDRAMC. */
memory_region_init_io(iomem, NULL, &m5208_sys_ops, NULL, "m5208-sys", 0x00004000);
memory_region_add_subregion(address_space, 0xfc0a8000, iomem);
/* Timers. */
for (i = 0; i < 2; i++) {
s = g_new0(m5208_timer_state, 1);
s->timer = ptimer_init(m5208_timer_trigger, s, PTIMER_POLICY_DEFAULT);
memory_region_init_io(&s->iomem, NULL, &m5208_timer_ops, s,
"m5208-timer", 0x00004000);
memory_region_add_subregion(address_space, 0xfc080000 + 0x4000 * i,
&s->iomem);
s->irq = pic[4 + i];
}
}
static void mcf_fec_init(MemoryRegion *sysmem, NICInfo *nd, hwaddr base,
qemu_irq *irqs)
{
DeviceState *dev;
SysBusDevice *s;
int i;
qemu_check_nic_model(nd, TYPE_MCF_FEC_NET);
dev = qdev_new(TYPE_MCF_FEC_NET);
qdev_set_nic_properties(dev, nd);
s = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(s, &error_fatal);
for (i = 0; i < FEC_NUM_IRQ; i++) {
sysbus_connect_irq(s, i, irqs[i]);
}
memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0));
}
static void mcf5208evb_init(MachineState *machine)
{
ram_addr_t ram_size = machine->ram_size;
const char *kernel_filename = machine->kernel_filename;
M68kCPU *cpu;
CPUM68KState *env;
int kernel_size;
uint64_t elf_entry;
hwaddr entry;
qemu_irq *pic;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *rom = g_new(MemoryRegion, 1);
MemoryRegion *sram = g_new(MemoryRegion, 1);
cpu = M68K_CPU(cpu_create(machine->cpu_type));
env = &cpu->env;
/* Initialize CPU registers. */
env->vbr = 0;
/* TODO: Configure BARs. */
/* ROM at 0x00000000 */
memory_region_init_rom(rom, NULL, "mcf5208.rom", ROM_SIZE, &error_fatal);
memory_region_add_subregion(address_space_mem, 0x00000000, rom);
/* DRAM at 0x40000000 */
memory_region_add_subregion(address_space_mem, 0x40000000, machine->ram);
/* Internal SRAM. */
memory_region_init_ram(sram, NULL, "mcf5208.sram", 16 * KiB, &error_fatal);
memory_region_add_subregion(address_space_mem, 0x80000000, sram);
/* Internal peripherals. */
pic = mcf_intc_init(address_space_mem, 0xfc048000, cpu);
mcf_uart_mm_init(0xfc060000, pic[26], serial_hd(0));
mcf_uart_mm_init(0xfc064000, pic[27], serial_hd(1));
mcf_uart_mm_init(0xfc068000, pic[28], serial_hd(2));
mcf5208_sys_init(address_space_mem, pic);
if (nb_nics > 1) {
error_report("Too many NICs");
exit(1);
}
if (nd_table[0].used) {
mcf_fec_init(address_space_mem, &nd_table[0],
0xfc030000, pic + 36);
}
g_free(pic);
/* 0xfc000000 SCM. */
/* 0xfc004000 XBS. */
/* 0xfc008000 FlexBus CS. */
/* 0xfc030000 FEC. */
/* 0xfc040000 SCM + Power management. */
/* 0xfc044000 eDMA. */
/* 0xfc048000 INTC. */
/* 0xfc058000 I2C. */
/* 0xfc05c000 QSPI. */
/* 0xfc060000 UART0. */
/* 0xfc064000 UART0. */
/* 0xfc068000 UART0. */
/* 0xfc070000 DMA timers. */
/* 0xfc080000 PIT0. */
/* 0xfc084000 PIT1. */
/* 0xfc088000 EPORT. */
/* 0xfc08c000 Watchdog. */
/* 0xfc090000 clock module. */
/* 0xfc0a0000 CCM + reset. */
/* 0xfc0a4000 GPIO. */
/* 0xfc0a8000 SDRAM controller. */
/* Load firmware */
if (bios_name) {
char *fn;
uint8_t *ptr;
fn = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (!fn) {
error_report("Could not find ROM image '%s'", bios_name);
exit(1);
}
if (load_image_targphys(fn, 0x0, ROM_SIZE) < 8) {
error_report("Could not load ROM image '%s'", bios_name);
exit(1);
}
g_free(fn);
/* Initial PC is always at offset 4 in firmware binaries */
ptr = rom_ptr(0x4, 4);
assert(ptr != NULL);
env->pc = ldl_p(ptr);
}
/* Load kernel. */
if (!kernel_filename) {
if (qtest_enabled() || bios_name) {
return;
}
error_report("Kernel image must be specified");
exit(1);
}
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
NULL, NULL, NULL, 1, EM_68K, 0, 0);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
NULL, NULL);
}
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename, 0x40000000,
ram_size);
entry = 0x40000000;
}
if (kernel_size < 0) {
error_report("Could not load kernel '%s'", kernel_filename);
exit(1);
}
env->pc = entry;
}
static void mcf5208evb_machine_init(MachineClass *mc)
{
mc->desc = "MCF5208EVB";
mc->init = mcf5208evb_init;
mc->is_default = true;
mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5208");
mc->default_ram_id = "mcf5208.ram";
}
DEFINE_MACHINE("mcf5208evb", mcf5208evb_machine_init)
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