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qemu-e2k/hw/mips/fuloong2e.c
Philippe Mathieu-Daudé 36d7487b2a hw/mips/bootloader: Allow bl_gen_jump_kernel to optionally set register 
When one of the $sp/$a[0..3] register is already set, we might
want bl_gen_jump_kernel() to NOT set it again. Pass a boolean
argument for each register, to allow to optionally set them.

Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221026191821.28167-2-philmd@linaro.org>
2022-10-31 11:32:45 +01:00

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/*
* QEMU fuloong 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.
*/
/*
* Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
* https://www.linux-mips.org/wiki/Fuloong_2E
*
* Loongson 2e manuals:
* https://github.com/loongson-community/docs/tree/master/2E
*/
#include "qemu/osdep.h"
#include "qemu/datadir.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "cpu.h"
#include "hw/clock.h"
#include "net/net.h"
#include "hw/boards.h"
#include "hw/i2c/smbus_eeprom.h"
#include "hw/block/flash.h"
#include "hw/mips/mips.h"
#include "hw/mips/bootloader.h"
#include "hw/mips/cpudevs.h"
#include "hw/pci/pci.h"
#include "hw/loader.h"
#include "hw/ide/pci.h"
#include "hw/qdev-properties.h"
#include "elf.h"
#include "hw/isa/vt82c686.h"
#include "sysemu/qtest.h"
#include "sysemu/reset.h"
#include "sysemu/sysemu.h"
#include "qemu/error-report.h"
#define ENVP_PADDR 0x2000
#define ENVP_VADDR cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
#define ENVP_NB_ENTRIES 16
#define ENVP_ENTRY_SIZE 256
/* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
#define BIOS_SIZE (512 * KiB)
/*
* 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:
* https://github.com/loongson-community/pmon
*/
#define FULOONG_BIOSNAME "pmon_2e.bin"
/* PCI SLOT in Fuloong 2e */
#define FULOONG2E_VIA_SLOT 5
#define FULOONG2E_ATI_SLOT 6
#define FULOONG2E_RTL8139_SLOT 7
static struct _loaderparams {
int ram_size;
const char *kernel_filename;
const char *kernel_cmdline;
const char *initrd_filename;
} loaderparams;
static void G_GNUC_PRINTF(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_VADDR + table_addr);
va_start(ap, string);
vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
va_end(ap);
}
static uint64_t load_kernel(MIPSCPU *cpu)
{
uint64_t kernel_entry, kernel_high, initrd_size;
int index = 0;
long kernel_size;
ram_addr_t initrd_offset;
uint32_t *prom_buf;
long prom_size;
kernel_size = load_elf(loaderparams.kernel_filename, NULL,
cpu_mips_kseg0_to_phys, NULL,
&kernel_entry, NULL,
&kernel_high, NULL,
0, EM_MIPS, 1, 0);
if (kernel_size < 0) {
error_report("could not load kernel '%s': %s",
loaderparams.kernel_filename,
load_elf_strerror(kernel_size));
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 = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
if (initrd_offset + initrd_size > loaderparams.ram_size) {
error_report("memory too small for initial ram disk '%s'",
loaderparams.initrd_filename);
exit(1);
}
initrd_size = load_image_targphys(loaderparams.initrd_filename,
initrd_offset,
loaderparams.ram_size - initrd_offset);
}
if (initrd_size == (target_ulong) -1) {
error_report("could not load initial ram disk '%s'",
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=%" PRId64 " %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=%u", clock_get_hz(cpu->clock));
prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
prom_set(prom_buf, index++, NULL);
rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
g_free(prom_buf);
return kernel_entry;
}
static void write_bootloader(CPUMIPSState *env, uint8_t *base,
uint64_t kernel_addr)
{
uint32_t *p;
/* Small bootloader */
p = (uint32_t *)base;
/* j 0x1fc00040 */
stl_p(p++, 0x0bf00010);
/* nop */
stl_p(p++, 0x00000000);
/* Second part of the bootloader */
p = (uint32_t *)(base + 0x040);
bl_gen_jump_kernel(&p,
true, ENVP_VADDR - 64,
true, 2, true, ENVP_VADDR,
true, ENVP_VADDR + 8,
true, loaderparams.ram_size,
kernel_addr);
}
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));
}
}
/* 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 Fuloong board has a RTL8139 card using PCI SLOT 7 */
default_devaddr = "07";
}
pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
}
}
static void mips_fuloong2e_init(MachineState *machine)
{
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 *bios = g_new(MemoryRegion, 1);
long bios_size;
uint8_t *spd_data;
uint64_t kernel_entry;
PCIDevice *pci_dev;
PCIBus *pci_bus;
I2CBus *smbus;
Clock *cpuclk;
MIPSCPU *cpu;
CPUMIPSState *env;
DeviceState *dev;
cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
/* init CPUs */
cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
env = &cpu->env;
qemu_register_reset(main_cpu_reset, cpu);
/* TODO: support more than 256M RAM as highmem */
if (machine->ram_size != 256 * MiB) {
error_report("Invalid RAM size, should be 256MB");
exit(EXIT_FAILURE);
}
memory_region_add_subregion(address_space_mem, 0, machine->ram);
/* Boot ROM */
memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
&error_fatal);
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 = machine->ram_size;
loaderparams.kernel_filename = kernel_filename;
loaderparams.kernel_cmdline = kernel_cmdline;
loaderparams.initrd_filename = initrd_filename;
kernel_entry = load_kernel(cpu);
write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
} else {
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
machine->firmware ?: FULOONG_BIOSNAME);
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) &&
machine->firmware && !qtest_enabled()) {
error_report("Could not load MIPS bios '%s'", machine->firmware);
exit(1);
}
}
/* Init internal devices */
cpu_mips_irq_init_cpu(cpu);
cpu_mips_clock_init(cpu);
/* North bridge, Bonito --> IP2 */
pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
/* South bridge -> IP5 */
pci_dev = pci_create_simple_multifunction(pci_bus,
PCI_DEVFN(FULOONG2E_VIA_SLOT, 0),
true, TYPE_VT82C686B_ISA);
object_property_add_alias(OBJECT(machine), "rtc-time",
object_resolve_path_component(OBJECT(pci_dev),
"rtc"),
"date");
qdev_connect_gpio_out(DEVICE(pci_dev), 0, env->irq[5]);
dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "ide"));
pci_ide_create_devs(PCI_DEVICE(dev));
dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "pm"));
smbus = I2C_BUS(qdev_get_child_bus(dev, "i2c"));
/* GPU */
if (vga_interface_type != VGA_NONE) {
vga_interface_created = true;
pci_dev = pci_new(-1, "ati-vga");
dev = DEVICE(pci_dev);
qdev_prop_set_uint32(dev, "vgamem_mb", 16);
qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
}
/* Populate SPD eeprom data */
spd_data = spd_data_generate(DDR, machine->ram_size);
smbus_eeprom_init_one(smbus, 0x50, spd_data);
/* Network card: RTL8139D */
network_init(pci_bus);
}
static void mips_fuloong2e_machine_init(MachineClass *mc)
{
mc->desc = "Fuloong 2e mini pc";
mc->init = mips_fuloong2e_init;
mc->block_default_type = IF_IDE;
mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
mc->default_ram_size = 256 * MiB;
mc->default_ram_id = "fuloong2e.ram";
mc->minimum_page_bits = 14;
}
DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)
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