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Annotation of qemu/hw/milkymist.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  QEMU model for the Milkymist board.
        !             3:  *
        !             4:  *  Copyright (c) 2010 Michael Walle <[email protected]>
        !             5:  *
        !             6:  * This library is free software; you can redistribute it and/or
        !             7:  * modify it under the terms of the GNU Lesser General Public
        !             8:  * License as published by the Free Software Foundation; either
        !             9:  * version 2 of the License, or (at your option) any later version.
        !            10:  *
        !            11:  * This library is distributed in the hope that it will be useful,
        !            12:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            14:  * Lesser General Public License for more details.
        !            15:  *
        !            16:  * You should have received a copy of the GNU Lesser General Public
        !            17:  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
        !            18:  */
        !            19: 
        !            20: #include "sysbus.h"
        !            21: #include "hw.h"
        !            22: #include "net.h"
        !            23: #include "flash.h"
        !            24: #include "sysemu.h"
        !            25: #include "devices.h"
        !            26: #include "boards.h"
        !            27: #include "loader.h"
        !            28: #include "elf.h"
        !            29: #include "blockdev.h"
        !            30: #include "milkymist-hw.h"
        !            31: #include "lm32.h"
        !            32: 
        !            33: #define BIOS_FILENAME    "mmone-bios.bin"
        !            34: #define BIOS_OFFSET      0x00860000
        !            35: #define BIOS_SIZE        (512*1024)
        !            36: #define KERNEL_LOAD_ADDR 0x40000000
        !            37: 
        !            38: typedef struct {
        !            39:     CPUState *env;
        !            40:     target_phys_addr_t bootstrap_pc;
        !            41:     target_phys_addr_t flash_base;
        !            42:     target_phys_addr_t initrd_base;
        !            43:     size_t initrd_size;
        !            44:     target_phys_addr_t cmdline_base;
        !            45: } ResetInfo;
        !            46: 
        !            47: static void cpu_irq_handler(void *opaque, int irq, int level)
        !            48: {
        !            49:     CPUState *env = opaque;
        !            50: 
        !            51:     if (level) {
        !            52:         cpu_interrupt(env, CPU_INTERRUPT_HARD);
        !            53:     } else {
        !            54:         cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
        !            55:     }
        !            56: }
        !            57: 
        !            58: static void main_cpu_reset(void *opaque)
        !            59: {
        !            60:     ResetInfo *reset_info = opaque;
        !            61:     CPUState *env = reset_info->env;
        !            62: 
        !            63:     cpu_reset(env);
        !            64: 
        !            65:     /* init defaults */
        !            66:     env->pc = reset_info->bootstrap_pc;
        !            67:     env->regs[R_R1] = reset_info->cmdline_base;
        !            68:     env->regs[R_R2] = reset_info->initrd_base;
        !            69:     env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
        !            70:     env->eba = reset_info->flash_base;
        !            71:     env->deba = reset_info->flash_base;
        !            72: }
        !            73: 
        !            74: static void
        !            75: milkymist_init(ram_addr_t ram_size_not_used,
        !            76:                           const char *boot_device,
        !            77:                           const char *kernel_filename,
        !            78:                           const char *kernel_cmdline,
        !            79:                           const char *initrd_filename, const char *cpu_model)
        !            80: {
        !            81:     CPUState *env;
        !            82:     int kernel_size;
        !            83:     DriveInfo *dinfo;
        !            84:     ram_addr_t phys_sdram;
        !            85:     ram_addr_t phys_flash;
        !            86:     qemu_irq irq[32], *cpu_irq;
        !            87:     int i;
        !            88:     char *bios_filename;
        !            89:     ResetInfo *reset_info;
        !            90: 
        !            91:     /* memory map */
        !            92:     target_phys_addr_t flash_base   = 0x00000000;
        !            93:     size_t flash_sector_size        = 128 * 1024;
        !            94:     size_t flash_size               = 32 * 1024 * 1024;
        !            95:     target_phys_addr_t sdram_base   = 0x40000000;
        !            96:     size_t sdram_size               = 128 * 1024 * 1024;
        !            97: 
        !            98:     target_phys_addr_t initrd_base  = sdram_base + 0x1002000;
        !            99:     target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
        !           100:     size_t initrd_max = sdram_size - 0x1002000;
        !           101: 
        !           102:     reset_info = qemu_mallocz(sizeof(ResetInfo));
        !           103: 
        !           104:     if (cpu_model == NULL) {
        !           105:         cpu_model = "lm32-full";
        !           106:     }
        !           107:     env = cpu_init(cpu_model);
        !           108:     reset_info->env = env;
        !           109: 
        !           110:     cpu_lm32_set_phys_msb_ignore(env, 1);
        !           111: 
        !           112:     phys_sdram = qemu_ram_alloc(NULL, "milkymist.sdram", sdram_size);
        !           113:     cpu_register_physical_memory(sdram_base, sdram_size,
        !           114:             phys_sdram | IO_MEM_RAM);
        !           115: 
        !           116:     phys_flash = qemu_ram_alloc(NULL, "milkymist.flash", flash_size);
        !           117:     dinfo = drive_get(IF_PFLASH, 0, 0);
        !           118:     /* Numonyx JS28F256J3F105 */
        !           119:     pflash_cfi01_register(flash_base, phys_flash,
        !           120:                           dinfo ? dinfo->bdrv : NULL, flash_sector_size,
        !           121:                           flash_size / flash_sector_size, 2,
        !           122:                           0x00, 0x89, 0x00, 0x1d, 1);
        !           123: 
        !           124:     /* create irq lines */
        !           125:     cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
        !           126:     env->pic_state = lm32_pic_init(*cpu_irq);
        !           127:     for (i = 0; i < 32; i++) {
        !           128:         irq[i] = qdev_get_gpio_in(env->pic_state, i);
        !           129:     }
        !           130: 
        !           131:     /* load bios rom */
        !           132:     if (bios_name == NULL) {
        !           133:         bios_name = BIOS_FILENAME;
        !           134:     }
        !           135:     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
        !           136: 
        !           137:     if (bios_filename) {
        !           138:         load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
        !           139:     }
        !           140: 
        !           141:     reset_info->bootstrap_pc = BIOS_OFFSET;
        !           142: 
        !           143:     /* if no kernel is given no valid bios rom is a fatal error */
        !           144:     if (!kernel_filename && !dinfo && !bios_filename) {
        !           145:         fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
        !           146:                 bios_name);
        !           147:         exit(1);
        !           148:     }
        !           149: 
        !           150:     milkymist_uart_create(0x60000000, irq[0], irq[1]);
        !           151:     milkymist_sysctl_create(0x60001000, irq[2], irq[3], irq[4],
        !           152:             80000000, 0x10014d31, 0x0000041f, 0x00000001);
        !           153:     milkymist_hpdmc_create(0x60002000);
        !           154:     milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
        !           155:     milkymist_memcard_create(0x60004000);
        !           156:     milkymist_ac97_create(0x60005000, irq[5], irq[6], irq[7], irq[8]);
        !           157:     milkymist_pfpu_create(0x60006000, irq[9]);
        !           158:     milkymist_tmu2_create(0x60007000, irq[10]);
        !           159:     milkymist_minimac2_create(0x60008000, 0x30000000, irq[11], irq[12]);
        !           160:     milkymist_softusb_create(0x6000f000, irq[17],
        !           161:             0x20000000, 0x1000, 0x20020000, 0x2000);
        !           162: 
        !           163:     /* make sure juart isn't the first chardev */
        !           164:     env->juart_state = lm32_juart_init();
        !           165: 
        !           166:     if (kernel_filename) {
        !           167:         uint64_t entry;
        !           168: 
        !           169:         /* Boots a kernel elf binary.  */
        !           170:         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
        !           171:                                1, ELF_MACHINE, 0);
        !           172:         reset_info->bootstrap_pc = entry;
        !           173: 
        !           174:         if (kernel_size < 0) {
        !           175:             kernel_size = load_image_targphys(kernel_filename, sdram_base,
        !           176:                                               sdram_size);
        !           177:             reset_info->bootstrap_pc = sdram_base;
        !           178:         }
        !           179: 
        !           180:         if (kernel_size < 0) {
        !           181:             fprintf(stderr, "qemu: could not load kernel '%s'\n",
        !           182:                     kernel_filename);
        !           183:             exit(1);
        !           184:         }
        !           185:     }
        !           186: 
        !           187:     if (kernel_cmdline && strlen(kernel_cmdline)) {
        !           188:         pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
        !           189:                 kernel_cmdline);
        !           190:         reset_info->cmdline_base = (uint32_t)cmdline_base;
        !           191:     }
        !           192: 
        !           193:     if (initrd_filename) {
        !           194:         size_t initrd_size;
        !           195:         initrd_size = load_image_targphys(initrd_filename, initrd_base,
        !           196:                 initrd_max);
        !           197:         reset_info->initrd_base = (uint32_t)initrd_base;
        !           198:         reset_info->initrd_size = (uint32_t)initrd_size;
        !           199:     }
        !           200: 
        !           201:     qemu_register_reset(main_cpu_reset, reset_info);
        !           202: }
        !           203: 
        !           204: static QEMUMachine milkymist_machine = {
        !           205:     .name = "milkymist",
        !           206:     .desc = "Milkymist One",
        !           207:     .init = milkymist_init,
        !           208:     .is_default = 0
        !           209: };
        !           210: 
        !           211: static void milkymist_machine_init(void)
        !           212: {
        !           213:     qemu_register_machine(&milkymist_machine);
        !           214: }
        !           215: 
        !           216: machine_init(milkymist_machine_init);

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