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Re: [Qemu-devel] [PATCH v2 5/6] MIPS: Initial support of fulong mini pc
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From: |
chen huacai |
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Subject: |
Re: [Qemu-devel] [PATCH v2 5/6] MIPS: Initial support of fulong mini pc (CPU definition, machine construction, etc.) |
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Date: |
Mon, 31 May 2010 22:35:03 +0800 |
On Sat, May 29, 2010 at 4:56 AM, Aurelien Jarno <address@hidden> wrote:
> Please find my comments below.
>
> On Wed, May 19, 2010 at 10:28:36PM +0800, Huacai Chen wrote:
>> Signed-off-by: Huacai Chen <address@hidden>
>> ---
>> Makefile.target | 2 +-
>> hw/mips_fulong2e.c | 421
>> ++++++++++++++++++++++++++++++++++++++++++
>> target-mips/translate_init.c | 35 ++++
>> 3 files changed, 457 insertions(+), 1 deletions(-)
>> create mode 100644 hw/mips_fulong2e.c
>>
>> diff --git a/Makefile.target b/Makefile.target
>> index 9ed4a8d..db4badd 100644
>> --- a/Makefile.target
>> +++ b/Makefile.target
>> @@ -221,7 +221,7 @@ obj-mips-y += dma.o vga.o i8259.o
>> obj-mips-y += g364fb.o jazz_led.o
>> obj-mips-y += gt64xxx.o pckbd.o mc146818rtc.o
>> obj-mips-y += piix4.o cirrus_vga.o
>> -obj-mips-$(CONFIG_FULONG) += bonito.o vt82c686.o
>> +obj-mips-$(CONFIG_FULONG) += bonito.o vt82c686.o mips_fulong2e.o
>>
>> obj-microblaze-y = petalogix_s3adsp1800_mmu.o
>>
>> diff --git a/hw/mips_fulong2e.c b/hw/mips_fulong2e.c
>> new file mode 100644
>> index 0000000..3e6ed7e
>> --- /dev/null
>> +++ b/hw/mips_fulong2e.c
>> @@ -0,0 +1,421 @@
>> +/*
>> + * QEMU fulong 2e mini pc support
>> + *
>> + * Copyright (c) 2008 yajin (address@hidden)
>> + * Copyright (c) 2009 chenming (address@hidden)
>> + * Copyright (c) 2010 Huacai Chen (address@hidden)
>> + * This code is licensed under the GNU GPL v2.
>> + */
>> +
>> +/*
>> + * 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.h"
>> +#include "pc.h"
>> +#include "fdc.h"
>> +#include "net.h"
>> +#include "boards.h"
>> +#include "smbus.h"
>> +#include "block.h"
>> +#include "flash.h"
>> +#include "mips.h"
>> +#include "mips_cpudevs.h"
>> +#include "pci.h"
>> +#include "usb-uhci.h"
>> +#include "qemu-char.h"
>> +#include "sysemu.h"
>> +#include "audio/audio.h"
>> +#include "qemu-log.h"
>> +#include "loader.h"
>> +#include "mips-bios.h"
>> +#include "ide.h"
>> +#include "elf.h"
>> +#include "mc146818rtc.h"
>> +
>> +#define DEBUG_FULONG2E_INIT
>> +
>> +#define ENVP_ADDR 0x80002000l
>> +#define ENVP_NB_ENTRIES 16
>> +#define ENVP_ENTRY_SIZE 256
>> +
>> +#define MAX_IDE_BUS 2
>> +
>> +/* PCI SLOT in fulong 2e */
>> +#define FULONG2E_VIA_SLOT 5
>> +#define FULONG2E_ATI_SLOT 6
>> +#define FULONG2E_RTL8139_SLOT 7
>> +
>> +static PITState *pit;
>> +
>> +static struct _loaderparams {
>> + int ram_size;
>> + const char *kernel_filename;
>> + const char *kernel_cmdline;
>> + const char *initrd_filename;
>> +} loaderparams;
>> +
>> +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 ();
>
> Coding style
>
>> +}
>> +
>> +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,
>> +};
>
> If the same function is used for all width, it's probably better to call
> it with a name not ending with l.
>
Do you means I should use mips_qemu_read to replace mips_qemu_readl? I
think this may be more confusing, besides, I see too many examples to
use an "l" suffix in qemu code.
>> +static int mips_qemu_iomemtype = 0;
>> +
>> +static void 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 (CPUState *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 + ~TARGET_PAGE_MASK) &
>> TARGET_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 = qemu_malloc(prom_size);
>> +
>> + prom_set(prom_buf, index++, 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++, 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 (CPUState *env, uint8_t *base, int64_t
>> kernel_addr)
>> +{
>> + uint32_t *p;
>> +
>> + /* Small bootloader */
>> + p = (uint32_t *) base;
>> +
>> + stl_raw(p++, 0x0bf00010); /* j
>> 0x1fc00040 */
>> + stl_raw(p++, 0x00000000); /* nop */
>> +
>> + /* Second part of the bootloader */
>> + p = (uint32_t *) (base + 0x040);
>> +
>> + stl_raw(p++, 0x3c040000); /* lui
>> a0, 0 */
>> + stl_raw(p++, 0x34840002); /* ori
>> a0, a0, 2 */
>> + stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff)); /* lui
>> a1, high(ENVP_ADDR) */
>> + stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff)); /* ori
>> a1, a0, low(ENVP_ADDR) */
>> + stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui
>> a2, high(ENVP_ADDR + 8) */
>> + stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff)); /* ori
>> a2, a2, low(ENVP_ADDR + 8) */
>> + stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16)); /* lui
>> a3, high(env->ram_size) */
>> + stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff)); /* ori
>> a3, a3, low(env->ram_size) */
>> + stl_raw(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff)); /* lui
>> ra, high(kernel_addr) */;
>> + stl_raw(p++, 0x37ff0000 | (kernel_addr & 0xffff)); /* ori
>> ra, ra, low(kernel_addr) */
>> + stl_raw(p++, 0x03e00008); /* jr ra
>> */
>> + stl_raw(p++, 0x00000000); /* nop */
>> +}
>> +
>> +
>> +static void main_cpu_reset(void *opaque)
>> +{
>> + CPUState *env = opaque;
>> +
>> + cpu_reset(env);
>> + /* TODO: 2E reset stuff */
>> + if (loaderparams.kernel_filename) {
>> + env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
>> + }
>> +}
>> +
>> +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
>> +};
>
> Indentation
>
>> +/* Audio support */
>> +#ifdef HAS_AUDIO
>> +static void audio_init (PCIBus *pci_bus)
>> +{
>> + vt82c686b_ac97_init(pci_bus, (FULONG2E_VIA_SLOT << 3) + 5);
>> + vt82c686b_mc97_init(pci_bus, (FULONG2E_VIA_SLOT << 3) + 6);
>> +}
>> +#endif
>> +
>> +/* Network support */
>> +static void network_init (void)
>> +{
>> + 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, "rtl8139", default_devaddr);
>> + }
>> +}
>> +
>> +static void mips_fulong2e_init(ram_addr_t ram_size, const char *boot_device,
>> + const char *kernel_filename, const char
>> *kernel_cmdline,
>> + const char *initrd_filename, const char *cpu_model)
>> +{
>> + char *filename;
>> + char buf[1024];
>> + unsigned long ram_offset, bios_offset;
>> + unsigned long bios_size;
>> + int64_t kernel_entry;
>> + qemu_irq *i8259;
>> + int via_devfn;
>> + PCIBus *pci_bus;
>> + ISADevice *isa_dev;
>> + uint8_t *eeprom_buf;
>> + i2c_bus *smbus;
>> + int i;
>> + DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
>> + DeviceState *eeprom;
>> + ISADevice *rtc_state;
>> + CPUState *env;
>> +
>> + /* init CPUs */
>> + if (cpu_model == NULL) {
>> + cpu_model = "Loongson-2E";
>> + }
>> + env = cpu_init(cpu_model);
>> + if (!env) {
>> + fprintf(stderr, "Unable to find CPU definition\n");
>> + exit(1);
>> + }
>> +
>> + register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
>> + qemu_register_reset(main_cpu_reset, env);
>> +
>> + /* fulong 2e has 256M ram. */
>> + if (ram_size != (256 * 1024 * 1024)) {
>> + printf("Warning! RAM size of fulong is not 256M. Set it to 256M\n");
>> + ram_size = 256 * 1024 * 1024;
>> + }
>> +
>> + /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
>> + bios_size = 1024 * 1024;
>> +
>> + /* allocate RAM */
>> + ram_offset = qemu_ram_alloc(ram_size);
>> + bios_offset = qemu_ram_alloc(bios_size);
>> +
>> + cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
>> +
>> + if (!mips_qemu_iomemtype) {
>> + mips_qemu_iomemtype = cpu_register_io_memory(mips_qemu_read,
>> + mips_qemu_write, NULL);
>> + }
>> +
>> + cpu_register_physical_memory(0x1fc00000LL,
>> + bios_size, bios_offset |
>> IO_MEM_ROM);
>> +
>> + /* 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 the BIOS is included in QEMU, it might be a good idea to have it
> loaded instead of the default BIOS_FILENAME.
>
>> + 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, qemu_get_ram_ptr(bios_offset), kernel_entry);
>> + } else {
>> + if (bios_name == NULL) {
>> + bios_name = BIOS_FILENAME;
>> + }
>> + filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
>> + if (filename) {
>> + bios_size = load_image_targphys(filename, 0x1fc00000LL,
>> + BIOS_SIZE);
>> + qemu_free(filename);
>> + } else {
>> + bios_size = -1;
>> + }
>> +
>> + if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
>> + fprintf(stderr, "qemu: Could not load MIPS bios '%s'\n", buf);
>> + exit(1);
>> + }
>> + }
>> +
>> + /* Init internal devices */
>> + cpu_mips_irq_init_cpu(env);
>> + cpu_mips_clock_init(env);
>> +
>> + /* Interrupt controller */
>> + /* The 8259 -> IP5 */
>> + i8259 = i8259_init(env->irq[5]);
>> +
>> + /* North bridge, Bonito --> IP2 */
>> + pci_bus = bonito_init(env->irq[2]);
>> +
>> + /* South bridge */
>> + if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
>> + fprintf(stderr, "qemu: too many IDE bus\n");
>> + exit(1);
>> + }
>> +
>> + for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
>> + hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
>> + }
>> +
>> + via_devfn = vt82c686b_init(pci_bus, FULONG2E_VIA_SLOT << 3);
>> + if (via_devfn < 0) {
>> + fprintf(stderr, "vt82c686b_init error \n");
>> + exit(1);
>> + }
>> +
>> + isa_bus_irqs(i8259);
>> + vt82c686b_ide_init(pci_bus, hd, (FULONG2E_VIA_SLOT << 3) + 1);
>> + usb_uhci_vt82c686b_init(pci_bus, (FULONG2E_VIA_SLOT << 3) + 2);
>> + usb_uhci_vt82c686b_init(pci_bus, (FULONG2E_VIA_SLOT << 3) + 3);
>> +
>> + smbus = vt82c686b_pm_init(pci_bus, (FULONG2E_VIA_SLOT << 3) + 4,
>> + 0xeee1, NULL);
>> + eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
>> + memcpy(eeprom_buf, eeprom_spd, sizeof(eeprom_spd));
>> + /* TODO: Populate SPD eeprom data. */
>> + eeprom = qdev_create((BusState *)smbus, "smbus-eeprom");
>> + qdev_prop_set_uint8(eeprom, "address", 0x50);
>> + qdev_prop_set_ptr(eeprom, "data", eeprom_buf);
>> + qdev_init_nofail(eeprom);
>> +
>> + /* init other devices */
>> + pit = pit_init(0x40, isa_reserve_irq(0));
>> + DMA_init(0);
>> +
>> + /* Super I/O */
>> + isa_dev = isa_create_simple("i8042");
>> +
>> + rtc_state = rtc_init(2000);
>> +
>> + for(i = 0; i < MAX_SERIAL_PORTS; i++) {
>> + if (serial_hds[i]) {
>> + serial_isa_init(i, serial_hds[i]);
>> + }
>> + }
>> +
>> + if (parallel_hds[0])
>> + parallel_init(0, parallel_hds[0]);
>
> Coding style
>
>> +
>> + /* Sound card */
>> +#ifdef HAS_AUDIO
>> + audio_init(pci_bus);
>> +#endif
>> + /* Network card */
>> + network_init();
>> +}
>> +
>> +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);
>
>> diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c
>> index b79ed56..dd86d66 100644
>> --- a/target-mips/translate_init.c
>> +++ b/target-mips/translate_init.c
>> @@ -454,6 +454,41 @@ static const mips_def_t mips_defs[] =
>> .insn_flags = CPU_MIPS64R2 | ASE_MIPS3D,
>> .mmu_type = MMU_TYPE_R4000,
>> },
>> + {
>> + .name = "Loongson-2E",
>> + .CP0_PRid = 0x6302,
>> + /*64KB I-cache and d-cache. 4 way with 32 bit cache line size*/
>> + .CP0_Config0 = (0x1<<17) | (0x1<<16) | (0x1<<11) | (0x1<<8) |
>> (0x1<<5) |
>> + (0x1<<4) | (0x1<<1),
>> + /* Note: Config1 is only used internally, Loongson-2E has only
>> Config0. */
>> + .CP0_Config1 = (1 << CP0C1_FP) | (47 << CP0C1_MMU),
>> + .SYNCI_Step = 16,
>> + .CCRes = 2,
>> + .CP0_Status_rw_bitmask = 0x35D0FFFF,
>> + .CP1_fcr0 = (0x5 << FCR0_PRID) | (0x1 << FCR0_REV),
>> + .SEGBITS = 40,
>> + .PABITS = 40,
>> + .insn_flags = CPU_MIPS3,
>> + .mmu_type = MMU_TYPE_R4000,
>> + },
>> + {
>> + .name = "Loongson-2F",
>> + .CP0_PRid = 0x6303,
>> + /*64KB I-cache and d-cache. 4 way with 32 bit cache line size*/
>> + .CP0_Config0 = (0x1<<17) | (0x1<<16) | (0x1<<11) | (0x1<<8) |
>> (0x1<<5) |
>> + (0x1<<4) | (0x1<<1),
>> + /* Note: Config1 is only used internally, Loongson-2F has only
>> Config0. */
>> + .CP0_Config1 = (1 << CP0C1_FP) | (47 << CP0C1_MMU),
>> + .SYNCI_Step = 16,
>> + .CCRes = 2,
>> + .CP0_Status_rw_bitmask = 0xF5D0FF1F, /*bit5:7 not writeable*/
>> + .CP1_fcr0 = (0x5 << FCR0_PRID) | (0x1 << FCR0_REV),
>> + .SEGBITS = 40,
>> + .PABITS = 40,
>> + .insn_flags = CPU_MIPS3,
>> + .mmu_type = MMU_TYPE_R4000,
>> + },
>> +
>> #endif
>> };
>>
>
> The part below should be split in a specific patch. Also I seem to
> remember that the Loongson supports more instructions than the default
> MIPS III instruction set. It should probably be noted near the
> insn_flags bits until they are implemented later.
>
> --
> Aurelien Jarno GPG: 1024D/F1BCDB73
> address@hidden http://www.aurel32.net
>
--
Huacai Chen