/*
* QEMU fulong 2e mini pc support
*
* Copyright (c) 2008 yajin (yajin@vm-kernel.org)
* Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)
* Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
* This code is licensed under the GNU GPL v2.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
/*
* Fulong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
* http://www.linux-mips.org/wiki/Fulong
*
* Loongson 2e user manual:
* http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf
*/
#include "hw/hw.h"
#include "hw/i386/pc.h"
#include "hw/char/serial.h"
#include "hw/block/fdc.h"
#include "net/net.h"
#include "hw/boards.h"
#include "hw/i2c/smbus.h"
#include "block/block.h"
#include "hw/block/flash.h"
#include "hw/mips/mips.h"
#include "hw/mips/cpudevs.h"
#include "hw/pci/pci.h"
#include "sysemu/char.h"
#include "sysemu/sysemu.h"
#include "audio/audio.h"
#include "qemu/log.h"
#include "hw/loader.h"
#include "hw/mips/bios.h"
#include "hw/ide.h"
#include "elf.h"
#include "hw/isa/vt82c686.h"
#include "hw/timer/mc146818rtc.h"
#include "hw/timer/i8254.h"
#include "sysemu/blockdev.h"
#include "exec/address-spaces.h"
#include "sysemu/qtest.h"
#include "qemu/error-report.h"
#define DEBUG_FULONG2E_INIT
#define ENVP_ADDR 0x80002000l
#define ENVP_NB_ENTRIES 16
#define ENVP_ENTRY_SIZE 256
#define MAX_IDE_BUS 2
/*
* PMON is not part of qemu and released with BSD license, anyone
* who want to build a pmon binary please first git-clone the source
* from the git repository at:
* http://www.loongson.cn/support/git/pmon
* Then follow the "Compile Guide" available at:
* http://dev.lemote.com/code/pmon
*
* Notes:
* 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
* 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
* in the "Compile Guide".
*/
#define FULONG_BIOSNAME "pmon_fulong2e.bin"
/* PCI SLOT in fulong 2e */
#define FULONG2E_VIA_SLOT 5
#define FULONG2E_ATI_SLOT 6
#define FULONG2E_RTL8139_SLOT 7
static ISADevice *pit;
static struct _loaderparams {
int ram_size;
const char *kernel_filename;
const char *kernel_cmdline;
const char *initrd_filename;
} loaderparams;
static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
const char *string, ...)
{
va_list ap;
int32_t table_addr;
if (index >= ENVP_NB_ENTRIES)
return;
if (string == NULL) {
prom_buf[index] = 0;
return;
}
table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
va_start(ap, string);
vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
va_end(ap);
}
static int64_t load_kernel (CPUMIPSState *env)
{
int64_t kernel_entry, kernel_low, kernel_high;
int index = 0;
long initrd_size;
ram_addr_t initrd_offset;
uint32_t *prom_buf;
long prom_size;
if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
(uint64_t *)&kernel_high, 0, ELF_MACHINE, 1) < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
loaderparams.kernel_filename);
exit(1);
}
/* load initrd */
initrd_size = 0;
initrd_offset = 0;
if (loaderparams.initrd_filename) {
initrd_size = get_image_size (loaderparams.initrd_filename);
if (initrd_size > 0) {
initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
if (initrd_offset + initrd_size > ram_size) {
fprintf(stderr,
"qemu: memory too small for initial ram disk '%s'\n",
loaderparams.initrd_filename);
exit(1);
}
initrd_size = load_image_targphys(loaderparams.initrd_filename,
initrd_offset, ram_size - initrd_offset);
}
if (initrd_size == (target_ulong) -1) {
fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
loaderparams.initrd_filename);
exit(1);
}
}
/* Setup prom parameters. */
prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
prom_buf = g_malloc(prom_size);
prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
if (initrd_size > 0) {
prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
loaderparams.kernel_cmdline);
} else {
prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
}
/* Setup minimum environment variables */
prom_set(prom_buf, index++, "busclock=33000000");
prom_set(prom_buf, index++, "cpuclock=100000000");
prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);
prom_set(prom_buf, index++, "modetty0=38400n8r");
prom_set(prom_buf, index++, NULL);
rom_add_blob_fixed("prom", prom_buf, prom_size,
cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
return kernel_entry;
}
static void write_bootloader (CPUMIPSState *env, uint8_t *base, int64_t kernel_addr)
{
uint32_t *p;
/* Small bootloader */
p = (uint32_t *) base;
stl_p(p++, 0x0bf00010); /* j 0x1fc00040 */
stl_p(p++, 0x00000000); /* nop */
/* Second part of the bootloader */
p = (uint32_t *) (base + 0x040);
stl_p(p++, 0x3c040000); /* lui a0, 0 */
stl_p(p++, 0x34840002); /* ori a0, a0, 2 */
stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff)); /* lui a1, high(ENVP_ADDR) */
stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff)); /* ori a1, a0, low(ENVP_ADDR) */
stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff)); /* ori a2, a2, low(ENVP_ADDR + 8) */
stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16)); /* lui a3, high(env->ram_size) */
stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff)); /* ori a3, a3, low(env->ram_size) */
stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff)); /* lui ra, high(kernel_addr) */;
stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff)); /* ori ra, ra, low(kernel_addr) */
stl_p(p++, 0x03e00008); /* jr ra */
stl_p(p++, 0x00000000); /* nop */
}
static void main_cpu_reset(void *opaque)
{
MIPSCPU *cpu = opaque;
CPUMIPSState *env = &cpu->env;
cpu_reset(CPU(cpu));
/* TODO: 2E reset stuff */
if (loaderparams.kernel_filename) {
env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
}
}
static const uint8_t eeprom_spd[0x80] = {
0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
0x20,0x30,0x20
};
/* Audio support */
static void audio_init (PCIBus *pci_bus)
{
vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));
vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));
}
/* Network support */
static void network_init (PCIBus *pci_bus)
{
int i;
for(i = 0; i < nb_nics; i++) {
NICInfo *nd = &nd_table[i];
const char *default_devaddr = NULL;
if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
/* The fulong board has a RTL8139 card using PCI SLOT 7 */
default_devaddr = "07";
}
pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
}
}
static void cpu_request_exit(void *opaque, int irq, int level)
{
CPUState *cpu = current_cpu;
if (cpu && level) {
cpu_exit(cpu);
}
}
static void mips_fulong2e_init(MachineState *machine)
{
ram_addr_t ram_size = machine->ram_size;
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
char *filename;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *bios = g_new(MemoryRegion, 1);
long bios_size;
int64_t kernel_entry;
qemu_irq *i8259;
qemu_irq *cpu_exit_irq;
PCIBus *pci_bus;
ISABus *isa_bus;
I2CBus *smbus;
int i;
DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
MIPSCPU *cpu;
CPUMIPSState *env;
/* init CPUs */
if (cpu_model == NULL) {
cpu_model = "Loongson-2E";
}
cpu = cpu_mips_init(cpu_model);
if (cpu == NULL) {
fprintf(stderr, "Unable to find CPU definition\n");
exit(1);
}
env = &cpu->env;
qemu_register_reset(main_cpu_reset, cpu);
/* fulong 2e has 256M ram. */
ram_size = 256 * 1024 * 1024;
/* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
bios_size = 1024 * 1024;
/* allocate RAM */
memory_region_init_ram(ram, NULL, "fulong2e.ram", ram_size);
vmstate_register_ram_global(ram);
memory_region_init_ram(bios, NULL, "fulong2e.bios", bios_size);
vmstate_register_ram_global(bios);
memory_region_set_readonly(bios, true);
memory_region_add_subregion(address_space_mem, 0, ram);
memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
/* We do not support flash operation, just loading pmon.bin as raw BIOS.
* Please use -L to set the BIOS path and -bios to set bios name. */
if (kernel_filename) {
loaderparams.ram_size = ram_size;
loaderparams.kernel_filename = kernel_filename;
loaderparams.kernel_cmdline = kernel_cmdline;
loaderparams.initrd_filename = initrd_filename;
kernel_entry = load_kernel (env);
write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
} else {
if (bios_name == NULL) {
bios_name = FULONG_BIOSNAME;
}
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (filename) {
bios_size = load_image_targphys(filename, 0x1fc00000LL,
BIOS_SIZE);
g_free(filename);
} else {
bios_size = -1;
}
if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
!kernel_filename && !qtest_enabled()) {
error_report("Could not load MIPS bios '%s'", bios_name);
exit(1);
}
}
/* Init internal devices */
cpu_mips_irq_init_cpu(env);
cpu_mips_clock_init(env);
/* North bridge, Bonito --> IP2 */
pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
/* South bridge */
ide_drive_get(hd, MAX_IDE_BUS);
isa_bus = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));
if (!isa_bus) {
fprintf(stderr, "vt82c686b_init error\n");
exit(1);
}
/* Interrupt controller */
/* The 8259 -> IP5 */
i8259 = i8259_init(isa_bus, env->irq[5]);
isa_bus_irqs(isa_bus, i8259);
vt82c686b_ide_init(pci_bus, hd, PCI_DEVFN(FULONG2E_VIA_SLOT, 1));
pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2),
"vt82c686b-usb-uhci");
pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3),
"vt82c686b-usb-uhci");
smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),
0xeee1, NULL);
/* TODO: Populate SPD eeprom data. */
smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));
/* init other devices */
pit = pit_init(isa_bus, 0x40, 0, NULL);
cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
DMA_init(0, cpu_exit_irq);
/* Super I/O */
isa_create_simple(isa_bus, "i8042");
rtc_init(isa_bus, 2000, NULL);
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
if (serial_hds[i]) {
serial_isa_init(isa_bus, i, serial_hds[i]);
}
}
if (parallel_hds[0]) {
parallel_init(isa_bus, 0, parallel_hds[0]);
}
/* Sound card */
audio_init(pci_bus);
/* Network card */
network_init(pci_bus);
}
static QEMUMachine mips_fulong2e_machine = {
.name = "fulong2e",
.desc = "Fulong 2e mini pc",
.init = mips_fulong2e_init,
};
static void mips_fulong2e_machine_init(void)
{
qemu_register_machine(&mips_fulong2e_machine);
}
machine_init(mips_fulong2e_machine_init);
