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/*
* QEMU/MIPS pseudo-board
*
* emulates a simple machine with ISA-like bus.
* ISA IO space mapped to the 0x14000000 (PHYS) and
* ISA memory at the 0x10000000 (PHYS, 16Mb in size).
* All peripherial devices are attached to this "bus" with
* the standard PC ISA addresses.
*/
#include "vl.h"
#define BIOS_FILENAME "mips_bios.bin"
//#define BIOS_FILENAME "system.bin"
#define KERNEL_LOAD_ADDR (int32_t)0x80010000
#ifdef MIPS_HAS_MIPS64
#define INITRD_LOAD_ADDR (int64_t)0x80800000
#else
#define INITRD_LOAD_ADDR (int32_t)0x80800000
#endif
#define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
static const int ide_iobase[2] = { 0x1f0, 0x170 };
static const int ide_iobase2[2] = { 0x3f6, 0x376 };
static const int ide_irq[2] = { 14, 15 };
static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
extern FILE *logfile;
static PITState *pit; /* PIT i8254 */
/*i8254 PIT is attached to the IRQ0 at PIC i8259 */
/*The PIC is attached to the MIPS CPU INT0 pin */
static void pic_irq_request(void *opaque, int level)
{
CPUState *env = first_cpu;
if (level) {
env->CP0_Cause |= 0x00000400;
cpu_interrupt(env, CPU_INTERRUPT_HARD);
} else {
env->CP0_Cause &= ~0x00000400;
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
}
}
static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
uint32_t val)
{
if ((addr & 0xffff) == 0 && val == 42)
qemu_system_reset_request ();
else if ((addr & 0xffff) == 4 && val == 42)
qemu_system_shutdown_request ();
}
static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
{
return 0;
}
static CPUWriteMemoryFunc *mips_qemu_write[] = {
&mips_qemu_writel,
&mips_qemu_writel,
&mips_qemu_writel,
};
static CPUReadMemoryFunc *mips_qemu_read[] = {
&mips_qemu_readl,
&mips_qemu_readl,
&mips_qemu_readl,
};
static int mips_qemu_iomemtype = 0;
void load_kernel (CPUState *env, int ram_size, const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename)
{
int64_t entry = 0;
long kernel_size, initrd_size;
kernel_size = load_elf(kernel_filename, VIRT_TO_PHYS_ADDEND, &entry);
if (kernel_size >= 0) {
if ((entry & ~0x7fffffffULL) == 0x80000000)
entry = (int32_t)entry;
env->PC = entry;
} else {
kernel_size = load_image(kernel_filename,
phys_ram_base + KERNEL_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
if (kernel_size < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
kernel_filename);
exit(1);
}
env->PC = KERNEL_LOAD_ADDR;
}
/* load initrd */
initrd_size = 0;
if (initrd_filename) {
initrd_size = load_image(initrd_filename,
phys_ram_base + INITRD_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
if (initrd_size == (target_ulong) -1) {
fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
initrd_filename);
exit(1);
}
}
/* Store command line. */
if (initrd_size > 0) {
int ret;
ret = sprintf(phys_ram_base + (16 << 20) - 256,
"rd_start=0x" TLSZ " rd_size=%li ",
INITRD_LOAD_ADDR,
initrd_size);
strcpy (phys_ram_base + (16 << 20) - 256 + ret, kernel_cmdline);
}
else {
strcpy (phys_ram_base + (16 << 20) - 256, kernel_cmdline);
}
*(int *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
*(int *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
}
static void main_cpu_reset(void *opaque)
{
CPUState *env = opaque;
cpu_reset(env);
if (env->kernel_filename)
load_kernel (env, env->ram_size, env->kernel_filename,
env->kernel_cmdline, env->initrd_filename);
}
void mips_r4k_init (int ram_size, int vga_ram_size, int boot_device,
DisplayState *ds, const char **fd_filename, int snapshot,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename)
{
char buf[1024];
unsigned long bios_offset;
int ret;
CPUState *env;
static RTCState *rtc_state;
int i;
env = cpu_init();
register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
qemu_register_reset(main_cpu_reset, env);
/* allocate RAM */
cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
if (!mips_qemu_iomemtype) {
mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
mips_qemu_write, NULL);
}
cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
/* Try to load a BIOS image. If this fails, we continue regardless,
but initialize the hardware ourselves. When a kernel gets
preloaded we also initialize the hardware, since the BIOS wasn't
run. */
bios_offset = ram_size + vga_ram_size;
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
ret = load_image(buf, phys_ram_base + bios_offset);
if (ret == BIOS_SIZE) {
cpu_register_physical_memory((uint32_t)(0x1fc00000),
BIOS_SIZE, bios_offset | IO_MEM_ROM);
} else {
/* not fatal */
fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
buf);
}
if (kernel_filename) {
load_kernel (env, ram_size, kernel_filename, kernel_cmdline,
initrd_filename);
env->ram_size = ram_size;
env->kernel_filename = kernel_filename;
env->kernel_cmdline = kernel_cmdline;
env->initrd_filename = initrd_filename;
}
/* Init CPU internal devices */
cpu_mips_clock_init(env);
cpu_mips_irqctrl_init();
rtc_state = rtc_init(0x70, 8);
/* Register 64 KB of ISA IO space at 0x14000000 */
isa_mmio_init(0x14000000, 0x00010000);
isa_mem_base = 0x10000000;
isa_pic = pic_init(pic_irq_request, env);
pit = pit_init(0x40, 0);
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
if (serial_hds[i]) {
serial_init(&pic_set_irq_new, isa_pic,
serial_io[i], serial_irq[i], serial_hds[i]);
}
}
isa_vga_init(ds, phys_ram_base + ram_size, ram_size,
vga_ram_size);
if (nd_table[0].vlan) {
if (nd_table[0].model == NULL
|| strcmp(nd_table[0].model, "ne2k_isa") == 0) {
isa_ne2000_init(0x300, 9, &nd_table[0]);
} else {
fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
exit (1);
}
}
for(i = 0; i < 2; i++)
isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
bs_table[2 * i], bs_table[2 * i + 1]);
}
QEMUMachine mips_machine = {
"mips",
"mips r4k platform",
mips_r4k_init,
};
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