diff options
Diffstat (limited to 'hw/mips/mips_malta.c')
| -rw-r--r-- | hw/mips/mips_malta.c | 1037 |
1 files changed, 1037 insertions, 0 deletions
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c new file mode 100644 index 0000000000..9a67dce207 --- /dev/null +++ b/hw/mips/mips_malta.c @@ -0,0 +1,1037 @@ +/* + * QEMU Malta board support + * + * Copyright (c) 2006 Aurelien Jarno + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/hw.h" +#include "hw/pc.h" +#include "hw/serial.h" +#include "hw/fdc.h" +#include "net/net.h" +#include "hw/boards.h" +#include "hw/smbus.h" +#include "block/block.h" +#include "hw/flash.h" +#include "hw/mips.h" +#include "hw/mips_cpudevs.h" +#include "hw/pci/pci.h" +#include "char/char.h" +#include "sysemu/sysemu.h" +#include "sysemu/arch_init.h" +#include "hw/boards.h" +#include "qemu/log.h" +#include "hw/mips-bios.h" +#include "hw/ide.h" +#include "hw/loader.h" +#include "elf.h" +#include "hw/mc146818rtc.h" +#include "hw/i8254.h" +#include "sysemu/blockdev.h" +#include "exec/address-spaces.h" +#include "hw/sysbus.h" /* SysBusDevice */ + +//#define DEBUG_BOARD_INIT + +#define ENVP_ADDR 0x80002000l +#define ENVP_NB_ENTRIES 16 +#define ENVP_ENTRY_SIZE 256 + +/* Hardware addresses */ +#define FLASH_ADDRESS 0x1e000000ULL +#define FPGA_ADDRESS 0x1f000000ULL +#define RESET_ADDRESS 0x1fc00000ULL + +#define FLASH_SIZE 0x400000 + +#define MAX_IDE_BUS 2 + +typedef struct { + MemoryRegion iomem; + MemoryRegion iomem_lo; /* 0 - 0x900 */ + MemoryRegion iomem_hi; /* 0xa00 - 0x100000 */ + uint32_t leds; + uint32_t brk; + uint32_t gpout; + uint32_t i2cin; + uint32_t i2coe; + uint32_t i2cout; + uint32_t i2csel; + CharDriverState *display; + char display_text[9]; + SerialState *uart; +} MaltaFPGAState; + +typedef struct { + SysBusDevice busdev; + qemu_irq *i8259; +} MaltaState; + +static ISADevice *pit; + +static struct _loaderparams { + int ram_size; + const char *kernel_filename; + const char *kernel_cmdline; + const char *initrd_filename; +} loaderparams; + +/* Malta FPGA */ +static void malta_fpga_update_display(void *opaque) +{ + char leds_text[9]; + int i; + MaltaFPGAState *s = opaque; + + for (i = 7 ; i >= 0 ; i--) { + if (s->leds & (1 << i)) + leds_text[i] = '#'; + else + leds_text[i] = ' '; + } + leds_text[8] = '\0'; + + qemu_chr_fe_printf(s->display, "\e[H\n\n|\e[32m%-8.8s\e[00m|\r\n", leds_text); + qemu_chr_fe_printf(s->display, "\n\n\n\n|\e[31m%-8.8s\e[00m|", s->display_text); +} + +/* + * EEPROM 24C01 / 24C02 emulation. + * + * Emulation for serial EEPROMs: + * 24C01 - 1024 bit (128 x 8) + * 24C02 - 2048 bit (256 x 8) + * + * Typical device names include Microchip 24C02SC or SGS Thomson ST24C02. + */ + +//~ #define DEBUG + +#if defined(DEBUG) +# define logout(fmt, ...) fprintf(stderr, "MALTA\t%-24s" fmt, __func__, ## __VA_ARGS__) +#else +# define logout(fmt, ...) ((void)0) +#endif + +struct _eeprom24c0x_t { + uint8_t tick; + uint8_t address; + uint8_t command; + uint8_t ack; + uint8_t scl; + uint8_t sda; + uint8_t data; + //~ uint16_t size; + uint8_t contents[256]; +}; + +typedef struct _eeprom24c0x_t eeprom24c0x_t; + +static eeprom24c0x_t eeprom = { + .contents = { + /* 00000000: */ 0x80,0x08,0x04,0x0D,0x0A,0x01,0x40,0x00, + /* 00000008: */ 0x01,0x75,0x54,0x00,0x82,0x08,0x00,0x01, + /* 00000010: */ 0x8F,0x04,0x02,0x01,0x01,0x00,0x0E,0x00, + /* 00000018: */ 0x00,0x00,0x00,0x14,0x0F,0x14,0x2D,0x40, + /* 00000020: */ 0x15,0x08,0x15,0x08,0x00,0x00,0x00,0x00, + /* 00000028: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000030: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000038: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x12,0xD0, + /* 00000040: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000048: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000050: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000058: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000060: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000068: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000070: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + /* 00000078: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x64,0xF4, + }, +}; + +static uint8_t eeprom24c0x_read(void) +{ + logout("%u: scl = %u, sda = %u, data = 0x%02x\n", + eeprom.tick, eeprom.scl, eeprom.sda, eeprom.data); + return eeprom.sda; +} + +static void eeprom24c0x_write(int scl, int sda) +{ + if (eeprom.scl && scl && (eeprom.sda != sda)) { + logout("%u: scl = %u->%u, sda = %u->%u i2c %s\n", + eeprom.tick, eeprom.scl, scl, eeprom.sda, sda, sda ? "stop" : "start"); + if (!sda) { + eeprom.tick = 1; + eeprom.command = 0; + } + } else if (eeprom.tick == 0 && !eeprom.ack) { + /* Waiting for start. */ + logout("%u: scl = %u->%u, sda = %u->%u wait for i2c start\n", + eeprom.tick, eeprom.scl, scl, eeprom.sda, sda); + } else if (!eeprom.scl && scl) { + logout("%u: scl = %u->%u, sda = %u->%u trigger bit\n", + eeprom.tick, eeprom.scl, scl, eeprom.sda, sda); + if (eeprom.ack) { + logout("\ti2c ack bit = 0\n"); + sda = 0; + eeprom.ack = 0; + } else if (eeprom.sda == sda) { + uint8_t bit = (sda != 0); + logout("\ti2c bit = %d\n", bit); + if (eeprom.tick < 9) { + eeprom.command <<= 1; + eeprom.command += bit; + eeprom.tick++; + if (eeprom.tick == 9) { + logout("\tcommand 0x%04x, %s\n", eeprom.command, bit ? "read" : "write"); + eeprom.ack = 1; + } + } else if (eeprom.tick < 17) { + if (eeprom.command & 1) { + sda = ((eeprom.data & 0x80) != 0); + } + eeprom.address <<= 1; + eeprom.address += bit; + eeprom.tick++; + eeprom.data <<= 1; + if (eeprom.tick == 17) { + eeprom.data = eeprom.contents[eeprom.address]; + logout("\taddress 0x%04x, data 0x%02x\n", eeprom.address, eeprom.data); + eeprom.ack = 1; + eeprom.tick = 0; + } + } else if (eeprom.tick >= 17) { + sda = 0; + } + } else { + logout("\tsda changed with raising scl\n"); + } + } else { + logout("%u: scl = %u->%u, sda = %u->%u\n", eeprom.tick, eeprom.scl, scl, eeprom.sda, sda); + } + eeprom.scl = scl; + eeprom.sda = sda; +} + +static uint64_t malta_fpga_read(void *opaque, hwaddr addr, + unsigned size) +{ + MaltaFPGAState *s = opaque; + uint32_t val = 0; + uint32_t saddr; + + saddr = (addr & 0xfffff); + + switch (saddr) { + + /* SWITCH Register */ + case 0x00200: + val = 0x00000000; /* All switches closed */ + break; + + /* STATUS Register */ + case 0x00208: +#ifdef TARGET_WORDS_BIGENDIAN + val = 0x00000012; +#else + val = 0x00000010; +#endif + break; + + /* JMPRS Register */ + case 0x00210: + val = 0x00; + break; + + /* LEDBAR Register */ + case 0x00408: + val = s->leds; + break; + + /* BRKRES Register */ + case 0x00508: + val = s->brk; + break; + + /* UART Registers are handled directly by the serial device */ + + /* GPOUT Register */ + case 0x00a00: + val = s->gpout; + break; + + /* XXX: implement a real I2C controller */ + + /* GPINP Register */ + case 0x00a08: + /* IN = OUT until a real I2C control is implemented */ + if (s->i2csel) + val = s->i2cout; + else + val = 0x00; + break; + + /* I2CINP Register */ + case 0x00b00: + val = ((s->i2cin & ~1) | eeprom24c0x_read()); + break; + + /* I2COE Register */ + case 0x00b08: + val = s->i2coe; + break; + + /* I2COUT Register */ + case 0x00b10: + val = s->i2cout; + break; + + /* I2CSEL Register */ + case 0x00b18: + val = s->i2csel; + break; + + default: +#if 0 + printf ("malta_fpga_read: Bad register offset 0x" TARGET_FMT_lx "\n", + addr); +#endif + break; + } + return val; +} + +static void malta_fpga_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + MaltaFPGAState *s = opaque; + uint32_t saddr; + + saddr = (addr & 0xfffff); + + switch (saddr) { + + /* SWITCH Register */ + case 0x00200: + break; + + /* JMPRS Register */ + case 0x00210: + break; + + /* LEDBAR Register */ + case 0x00408: + s->leds = val & 0xff; + malta_fpga_update_display(s); + break; + + /* ASCIIWORD Register */ + case 0x00410: + snprintf(s->display_text, 9, "%08X", (uint32_t)val); + malta_fpga_update_display(s); + break; + + /* ASCIIPOS0 to ASCIIPOS7 Registers */ + case 0x00418: + case 0x00420: + case 0x00428: + case 0x00430: + case 0x00438: + case 0x00440: + case 0x00448: + case 0x00450: + s->display_text[(saddr - 0x00418) >> 3] = (char) val; + malta_fpga_update_display(s); + break; + + /* SOFTRES Register */ + case 0x00500: + if (val == 0x42) + qemu_system_reset_request (); + break; + + /* BRKRES Register */ + case 0x00508: + s->brk = val & 0xff; + break; + + /* UART Registers are handled directly by the serial device */ + + /* GPOUT Register */ + case 0x00a00: + s->gpout = val & 0xff; + break; + + /* I2COE Register */ + case 0x00b08: + s->i2coe = val & 0x03; + break; + + /* I2COUT Register */ + case 0x00b10: + eeprom24c0x_write(val & 0x02, val & 0x01); + s->i2cout = val; + break; + + /* I2CSEL Register */ + case 0x00b18: + s->i2csel = val & 0x01; + break; + + default: +#if 0 + printf ("malta_fpga_write: Bad register offset 0x" TARGET_FMT_lx "\n", + addr); +#endif + break; + } +} + +static const MemoryRegionOps malta_fpga_ops = { + .read = malta_fpga_read, + .write = malta_fpga_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void malta_fpga_reset(void *opaque) +{ + MaltaFPGAState *s = opaque; + + s->leds = 0x00; + s->brk = 0x0a; + s->gpout = 0x00; + s->i2cin = 0x3; + s->i2coe = 0x0; + s->i2cout = 0x3; + s->i2csel = 0x1; + + s->display_text[8] = '\0'; + snprintf(s->display_text, 9, " "); +} + +static void malta_fpga_led_init(CharDriverState *chr) +{ + qemu_chr_fe_printf(chr, "\e[HMalta LEDBAR\r\n"); + qemu_chr_fe_printf(chr, "+--------+\r\n"); + qemu_chr_fe_printf(chr, "+ +\r\n"); + qemu_chr_fe_printf(chr, "+--------+\r\n"); + qemu_chr_fe_printf(chr, "\n"); + qemu_chr_fe_printf(chr, "Malta ASCII\r\n"); + qemu_chr_fe_printf(chr, "+--------+\r\n"); + qemu_chr_fe_printf(chr, "+ +\r\n"); + qemu_chr_fe_printf(chr, "+--------+\r\n"); +} + +static MaltaFPGAState *malta_fpga_init(MemoryRegion *address_space, + hwaddr base, qemu_irq uart_irq, CharDriverState *uart_chr) +{ + MaltaFPGAState *s; + + s = (MaltaFPGAState *)g_malloc0(sizeof(MaltaFPGAState)); + + memory_region_init_io(&s->iomem, &malta_fpga_ops, s, + "malta-fpga", 0x100000); + memory_region_init_alias(&s->iomem_lo, "malta-fpga", + &s->iomem, 0, 0x900); + memory_region_init_alias(&s->iomem_hi, "malta-fpga", + &s->iomem, 0xa00, 0x10000-0xa00); + + memory_region_add_subregion(address_space, base, &s->iomem_lo); + memory_region_add_subregion(address_space, base + 0xa00, &s->iomem_hi); + + s->display = qemu_chr_new("fpga", "vc:320x200", malta_fpga_led_init); + + s->uart = serial_mm_init(address_space, base + 0x900, 3, uart_irq, + 230400, uart_chr, DEVICE_NATIVE_ENDIAN); + + malta_fpga_reset(s); + qemu_register_reset(malta_fpga_reset, s); + + return s; +} + +/* 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, "pcnet") == 0)) + /* The malta board has a PCNet card using PCI SLOT 11 */ + default_devaddr = "0b"; + + pci_nic_init_nofail(nd, "pcnet", default_devaddr); + } +} + +/* ROM and pseudo bootloader + + The following code implements a very very simple bootloader. It first + loads the registers a0 to a3 to the values expected by the OS, and + then jump at the kernel address. + + The bootloader should pass the locations of the kernel arguments and + environment variables tables. Those tables contain the 32-bit address + of NULL terminated strings. The environment variables table should be + terminated by a NULL address. + + For a simpler implementation, the number of kernel arguments is fixed + to two (the name of the kernel and the command line), and the two + tables are actually the same one. + + The registers a0 to a3 should contain the following values: + a0 - number of kernel arguments + a1 - 32-bit address of the kernel arguments table + a2 - 32-bit address of the environment variables table + a3 - RAM size in bytes +*/ + +static void write_bootloader (CPUMIPSState *env, uint8_t *base, + int64_t kernel_entry) +{ + uint32_t *p; + + /* Small bootloader */ + p = (uint32_t *)base; + stl_raw(p++, 0x0bf00160); /* j 0x1fc00580 */ + stl_raw(p++, 0x00000000); /* nop */ + + /* YAMON service vector */ + stl_raw(base + 0x500, 0xbfc00580); /* start: */ + stl_raw(base + 0x504, 0xbfc0083c); /* print_count: */ + stl_raw(base + 0x520, 0xbfc00580); /* start: */ + stl_raw(base + 0x52c, 0xbfc00800); /* flush_cache: */ + stl_raw(base + 0x534, 0xbfc00808); /* print: */ + stl_raw(base + 0x538, 0xbfc00800); /* reg_cpu_isr: */ + stl_raw(base + 0x53c, 0xbfc00800); /* unred_cpu_isr: */ + stl_raw(base + 0x540, 0xbfc00800); /* reg_ic_isr: */ + stl_raw(base + 0x544, 0xbfc00800); /* unred_ic_isr: */ + stl_raw(base + 0x548, 0xbfc00800); /* reg_esr: */ + stl_raw(base + 0x54c, 0xbfc00800); /* unreg_esr: */ + stl_raw(base + 0x550, 0xbfc00800); /* getchar: */ + stl_raw(base + 0x554, 0xbfc00800); /* syscon_read: */ + + + /* Second part of the bootloader */ + p = (uint32_t *) (base + 0x580); + stl_raw(p++, 0x24040002); /* addiu a0, zero, 2 */ + stl_raw(p++, 0x3c1d0000 | (((ENVP_ADDR - 64) >> 16) & 0xffff)); /* lui sp, high(ENVP_ADDR) */ + stl_raw(p++, 0x37bd0000 | ((ENVP_ADDR - 64) & 0xffff)); /* ori sp, sp, low(ENVP_ADDR) */ + stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff)); /* lui a1, high(ENVP_ADDR) */ + stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff)); /* ori a1, a1, 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(ram_size) */ + stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff)); /* ori a3, a3, low(ram_size) */ + + /* Load BAR registers as done by YAMON */ + stl_raw(p++, 0x3c09b400); /* lui t1, 0xb400 */ + +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c08df00); /* lui t0, 0xdf00 */ +#else + stl_raw(p++, 0x340800df); /* ori t0, r0, 0x00df */ +#endif + stl_raw(p++, 0xad280068); /* sw t0, 0x0068(t1) */ + + stl_raw(p++, 0x3c09bbe0); /* lui t1, 0xbbe0 */ + +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c08c000); /* lui t0, 0xc000 */ +#else + stl_raw(p++, 0x340800c0); /* ori t0, r0, 0x00c0 */ +#endif + stl_raw(p++, 0xad280048); /* sw t0, 0x0048(t1) */ +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c084000); /* lui t0, 0x4000 */ +#else + stl_raw(p++, 0x34080040); /* ori t0, r0, 0x0040 */ +#endif + stl_raw(p++, 0xad280050); /* sw t0, 0x0050(t1) */ + +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c088000); /* lui t0, 0x8000 */ +#else + stl_raw(p++, 0x34080080); /* ori t0, r0, 0x0080 */ +#endif + stl_raw(p++, 0xad280058); /* sw t0, 0x0058(t1) */ +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c083f00); /* lui t0, 0x3f00 */ +#else + stl_raw(p++, 0x3408003f); /* ori t0, r0, 0x003f */ +#endif + stl_raw(p++, 0xad280060); /* sw t0, 0x0060(t1) */ + +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c08c100); /* lui t0, 0xc100 */ +#else + stl_raw(p++, 0x340800c1); /* ori t0, r0, 0x00c1 */ +#endif + stl_raw(p++, 0xad280080); /* sw t0, 0x0080(t1) */ +#ifdef TARGET_WORDS_BIGENDIAN + stl_raw(p++, 0x3c085e00); /* lui t0, 0x5e00 */ +#else + stl_raw(p++, 0x3408005e); /* ori t0, r0, 0x005e */ +#endif + stl_raw(p++, 0xad280088); /* sw t0, 0x0088(t1) */ + + /* Jump to kernel code */ + stl_raw(p++, 0x3c1f0000 | ((kernel_entry >> 16) & 0xffff)); /* lui ra, high(kernel_entry) */ + stl_raw(p++, 0x37ff0000 | (kernel_entry & 0xffff)); /* ori ra, ra, low(kernel_entry) */ + stl_raw(p++, 0x03e00008); /* jr ra */ + stl_raw(p++, 0x00000000); /* nop */ + + /* YAMON subroutines */ + p = (uint32_t *) (base + 0x800); + stl_raw(p++, 0x03e00008); /* jr ra */ + stl_raw(p++, 0x24020000); /* li v0,0 */ + /* 808 YAMON print */ + stl_raw(p++, 0x03e06821); /* move t5,ra */ + stl_raw(p++, 0x00805821); /* move t3,a0 */ + stl_raw(p++, 0x00a05021); /* move t2,a1 */ + stl_raw(p++, 0x91440000); /* lbu a0,0(t2) */ + stl_raw(p++, 0x254a0001); /* addiu t2,t2,1 */ + stl_raw(p++, 0x10800005); /* beqz a0,834 */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x0ff0021c); /* jal 870 */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x08000205); /* j 814 */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x01a00008); /* jr t5 */ + stl_raw(p++, 0x01602021); /* move a0,t3 */ + /* 0x83c YAMON print_count */ + stl_raw(p++, 0x03e06821); /* move t5,ra */ + stl_raw(p++, 0x00805821); /* move t3,a0 */ + stl_raw(p++, 0x00a05021); /* move t2,a1 */ + stl_raw(p++, 0x00c06021); /* move t4,a2 */ + stl_raw(p++, 0x91440000); /* lbu a0,0(t2) */ + stl_raw(p++, 0x0ff0021c); /* jal 870 */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x254a0001); /* addiu t2,t2,1 */ + stl_raw(p++, 0x258cffff); /* addiu t4,t4,-1 */ + stl_raw(p++, 0x1580fffa); /* bnez t4,84c */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x01a00008); /* jr t5 */ + stl_raw(p++, 0x01602021); /* move a0,t3 */ + /* 0x870 */ + stl_raw(p++, 0x3c08b800); /* lui t0,0xb400 */ + stl_raw(p++, 0x350803f8); /* ori t0,t0,0x3f8 */ + stl_raw(p++, 0x91090005); /* lbu t1,5(t0) */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x31290040); /* andi t1,t1,0x40 */ + stl_raw(p++, 0x1120fffc); /* beqz t1,878 <outch+0x8> */ + stl_raw(p++, 0x00000000); /* nop */ + stl_raw(p++, 0x03e00008); /* jr ra */ + stl_raw(p++, 0xa1040000); /* sb a0,0(t0) */ + +} + +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); +} + +/* Kernel */ +static int64_t load_kernel (void) +{ + int64_t kernel_entry, kernel_high; + long initrd_size; + ram_addr_t initrd_offset; + int big_endian; + uint32_t *prom_buf; + long prom_size; + int prom_index = 0; + +#ifdef TARGET_WORDS_BIGENDIAN + big_endian = 1; +#else + big_endian = 0; +#endif + + if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL, + (uint64_t *)&kernel_entry, NULL, (uint64_t *)&kernel_high, + big_endian, 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 = g_malloc(prom_size); + + prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_filename); + if (initrd_size > 0) { + prom_set(prom_buf, prom_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, prom_index++, "%s", loaderparams.kernel_cmdline); + } + + prom_set(prom_buf, prom_index++, "memsize"); + prom_set(prom_buf, prom_index++, "%i", loaderparams.ram_size); + prom_set(prom_buf, prom_index++, "modetty0"); + prom_set(prom_buf, prom_index++, "38400n8r"); + prom_set(prom_buf, prom_index++, NULL); + + rom_add_blob_fixed("prom", prom_buf, prom_size, + cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR)); + + return kernel_entry; +} + +static void malta_mips_config(MIPSCPU *cpu) +{ + CPUMIPSState *env = &cpu->env; + CPUState *cs = CPU(cpu); + + env->mvp->CP0_MVPConf0 |= ((smp_cpus - 1) << CP0MVPC0_PVPE) | + ((smp_cpus * cs->nr_threads - 1) << CP0MVPC0_PTC); +} + +static void main_cpu_reset(void *opaque) +{ + MIPSCPU *cpu = opaque; + CPUMIPSState *env = &cpu->env; + + cpu_reset(CPU(cpu)); + + /* The bootloader does not need to be rewritten as it is located in a + read only location. The kernel location and the arguments table + location does not change. */ + if (loaderparams.kernel_filename) { + env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); + } + + malta_mips_config(cpu); +} + +static void cpu_request_exit(void *opaque, int irq, int level) +{ + CPUMIPSState *env = cpu_single_env; + + if (env && level) { + cpu_exit(env); + } +} + +static +void mips_malta_init(QEMUMachineInitArgs *args) +{ + ram_addr_t ram_size = args->ram_size; + const char *cpu_model = args->cpu_model; + const char *kernel_filename = args->kernel_filename; + const char *kernel_cmdline = args->kernel_cmdline; + const char *initrd_filename = args->initrd_filename; + char *filename; + pflash_t *fl; + MemoryRegion *system_memory = get_system_memory(); + MemoryRegion *ram = g_new(MemoryRegion, 1); + MemoryRegion *bios, *bios_alias = g_new(MemoryRegion, 1); + target_long bios_size = FLASH_SIZE; + int64_t kernel_entry; + PCIBus *pci_bus; + ISABus *isa_bus; + MIPSCPU *cpu; + CPUMIPSState *env; + qemu_irq *isa_irq; + qemu_irq *cpu_exit_irq; + int piix4_devfn; + i2c_bus *smbus; + int i; + DriveInfo *dinfo; + DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS]; + DriveInfo *fd[MAX_FD]; + int fl_idx = 0; + int fl_sectors = bios_size >> 16; + int be; + + DeviceState *dev = qdev_create(NULL, "mips-malta"); + MaltaState *s = DO_UPCAST(MaltaState, busdev.qdev, dev); + + qdev_init_nofail(dev); + + /* Make sure the first 3 serial ports are associated with a device. */ + for(i = 0; i < 3; i++) { + if (!serial_hds[i]) { + char label[32]; + snprintf(label, sizeof(label), "serial%d", i); + serial_hds[i] = qemu_chr_new(label, "null", NULL); + } + } + + /* init CPUs */ + if (cpu_model == NULL) { +#ifdef TARGET_MIPS64 + cpu_model = "20Kc"; +#else + cpu_model = "24Kf"; +#endif + } + + for (i = 0; i < smp_cpus; i++) { + cpu = cpu_mips_init(cpu_model); + if (cpu == NULL) { + fprintf(stderr, "Unable to find CPU definition\n"); + exit(1); + } + env = &cpu->env; + + /* Init internal devices */ + cpu_mips_irq_init_cpu(env); + cpu_mips_clock_init(env); + qemu_register_reset(main_cpu_reset, cpu); + } + env = first_cpu; + + /* allocate RAM */ + if (ram_size > (256 << 20)) { + fprintf(stderr, + "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n", + ((unsigned int)ram_size / (1 << 20))); + exit(1); + } + memory_region_init_ram(ram, "mips_malta.ram", ram_size); + vmstate_register_ram_global(ram); + memory_region_add_subregion(system_memory, 0, ram); + +#ifdef TARGET_WORDS_BIGENDIAN + be = 1; +#else + be = 0; +#endif + /* FPGA */ + /* The CBUS UART is attached to the MIPS CPU INT2 pin, ie interrupt 4 */ + malta_fpga_init(system_memory, FPGA_ADDRESS, env->irq[4], serial_hds[2]); + + /* Load firmware in flash / BIOS. */ + dinfo = drive_get(IF_PFLASH, 0, fl_idx); +#ifdef DEBUG_BOARD_INIT + if (dinfo) { + printf("Register parallel flash %d size " TARGET_FMT_lx " at " + "addr %08llx '%s' %x\n", + fl_idx, bios_size, FLASH_ADDRESS, + bdrv_get_device_name(dinfo->bdrv), fl_sectors); + } +#endif + fl = pflash_cfi01_register(FLASH_ADDRESS, NULL, "mips_malta.bios", + BIOS_SIZE, dinfo ? dinfo->bdrv : NULL, + 65536, fl_sectors, + 4, 0x0000, 0x0000, 0x0000, 0x0000, be); + bios = pflash_cfi01_get_memory(fl); + fl_idx++; + if (kernel_filename) { + /* Write a small bootloader to the flash location. */ + loaderparams.ram_size = ram_size; + loaderparams.kernel_filename = kernel_filename; + loaderparams.kernel_cmdline = kernel_cmdline; + loaderparams.initrd_filename = initrd_filename; + kernel_entry = load_kernel(); + write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry); + } else { + /* Load firmware from flash. */ + if (!dinfo) { + /* Load a BIOS image. */ + 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, FLASH_ADDRESS, + BIOS_SIZE); + g_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', and no -kernel argument was specified\n", + bios_name); + exit(1); + } + } + /* In little endian mode the 32bit words in the bios are swapped, + a neat trick which allows bi-endian firmware. */ +#ifndef TARGET_WORDS_BIGENDIAN + { + uint32_t *addr = memory_region_get_ram_ptr(bios); + uint32_t *end = addr + bios_size; + while (addr < end) { + bswap32s(addr); + addr++; + } + } +#endif + } + + /* Map the BIOS at a 2nd physical location, as on the real board. */ + memory_region_init_alias(bios_alias, "bios.1fc", bios, 0, BIOS_SIZE); + memory_region_add_subregion(system_memory, RESET_ADDRESS, bios_alias); + + /* Board ID = 0x420 (Malta Board with CoreLV) + XXX: theoretically 0x1e000010 should map to flash and 0x1fc00010 should + map to the board ID. */ + stl_p(memory_region_get_ram_ptr(bios) + 0x10, 0x00000420); + + /* Init internal devices */ + cpu_mips_irq_init_cpu(env); + cpu_mips_clock_init(env); + + /* + * We have a circular dependency problem: pci_bus depends on isa_irq, + * isa_irq is provided by i8259, i8259 depends on ISA, ISA depends + * on piix4, and piix4 depends on pci_bus. To stop the cycle we have + * qemu_irq_proxy() adds an extra bit of indirection, allowing us + * to resolve the isa_irq -> i8259 dependency after i8259 is initialized. + */ + isa_irq = qemu_irq_proxy(&s->i8259, 16); + + /* Northbridge */ + pci_bus = gt64120_register(isa_irq); + + /* Southbridge */ + ide_drive_get(hd, MAX_IDE_BUS); + + piix4_devfn = piix4_init(pci_bus, &isa_bus, 80); + + /* Interrupt controller */ + /* The 8259 is attached to the MIPS CPU INT0 pin, ie interrupt 2 */ + s->i8259 = i8259_init(isa_bus, env->irq[2]); + + isa_bus_irqs(isa_bus, s->i8259); + pci_piix4_ide_init(pci_bus, hd, piix4_devfn + 1); + pci_create_simple(pci_bus, piix4_devfn + 2, "piix4-usb-uhci"); + smbus = piix4_pm_init(pci_bus, piix4_devfn + 3, 0x1100, + isa_get_irq(NULL, 9), NULL, 0, NULL); + /* TODO: Populate SPD eeprom data. */ + smbus_eeprom_init(smbus, 8, NULL, 0); + 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); + serial_isa_init(isa_bus, 0, serial_hds[0]); + serial_isa_init(isa_bus, 1, serial_hds[1]); + if (parallel_hds[0]) + parallel_init(isa_bus, 0, parallel_hds[0]); + for(i = 0; i < MAX_FD; i++) { + fd[i] = drive_get(IF_FLOPPY, 0, i); + } + fdctrl_init_isa(isa_bus, fd); + + /* Sound card */ + audio_init(isa_bus, pci_bus); + + /* Network card */ + network_init(); + + /* Optional PCI video card */ + pci_vga_init(pci_bus); +} + +static int mips_malta_sysbus_device_init(SysBusDevice *sysbusdev) +{ + return 0; +} + +static void mips_malta_class_init(ObjectClass *klass, void *data) +{ + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + + k->init = mips_malta_sysbus_device_init; +} + +static const TypeInfo mips_malta_device = { + .name = "mips-malta", + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(MaltaState), + .class_init = mips_malta_class_init, +}; + +static QEMUMachine mips_malta_machine = { + .name = "malta", + .desc = "MIPS Malta Core LV", + .init = mips_malta_init, + .max_cpus = 16, + .is_default = 1, + DEFAULT_MACHINE_OPTIONS, +}; + +static void mips_malta_register_types(void) +{ + type_register_static(&mips_malta_device); +} + +static void mips_malta_machine_init(void) +{ + qemu_register_machine(&mips_malta_machine); +} + +type_init(mips_malta_register_types) +machine_init(mips_malta_machine_init); |