Annotation of qemu/hw/etraxfs.c, revision 1.1.1.4

1.1       root        1: /*
                      2:  * QEMU ETRAX System Emulator
                      3:  *
                      4:  * Copyright (c) 2007 Edgar E. Iglesias, Axis Communications AB.
                      5:  *
                      6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
                      7:  * of this software and associated documentation files (the "Software"), to deal
                      8:  * in the Software without restriction, including without limitation the rights
                      9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
                     10:  * copies of the Software, and to permit persons to whom the Software is
                     11:  * furnished to do so, subject to the following conditions:
                     12:  *
                     13:  * The above copyright notice and this permission notice shall be included in
                     14:  * all copies or substantial portions of the Software.
                     15:  *
                     16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
                     17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
                     19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
                     20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
                     21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
                     22:  * THE SOFTWARE.
                     23:  */
1.1.1.4 ! root       24: 
        !            25: #include "sysbus.h"
        !            26: #include "boards.h"
        !            27: #include "sysemu.h"
1.1.1.2   root       28: #include "net.h"
                     29: #include "flash.h"
                     30: #include "etraxfs.h"
                     31: 
                     32: #define FLASH_SIZE 0x2000000
                     33: #define INTMEM_SIZE (128 * 1024)
                     34: 
                     35: static uint32_t bootstrap_pc;
1.1       root       36: 
                     37: static void main_cpu_reset(void *opaque)
                     38: {
                     39:     CPUState *env = opaque;
                     40:     cpu_reset(env);
                     41: 
1.1.1.2   root       42:     env->pc = bootstrap_pc;
1.1       root       43: }
                     44: 
                     45: static
1.1.1.4 ! root       46: void bareetraxfs_init (ram_addr_t ram_size,
1.1.1.2   root       47:                        const char *boot_device,
1.1       root       48:                        const char *kernel_filename, const char *kernel_cmdline,
                     49:                        const char *initrd_filename, const char *cpu_model)
                     50: {
1.1.1.4 ! root       51:     DeviceState *dev;
        !            52:     SysBusDevice *s;
1.1       root       53:     CPUState *env;
1.1.1.4 ! root       54:     qemu_irq irq[30], nmi[2], *cpu_irq; 
1.1.1.2   root       55:     void *etraxfs_dmac;
                     56:     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
1.1       root       57:     int kernel_size;
1.1.1.2   root       58:     int i;
                     59:     ram_addr_t phys_ram;
                     60:     ram_addr_t phys_flash;
                     61:     ram_addr_t phys_intmem;
1.1       root       62: 
                     63:     /* init CPUs */
                     64:     if (cpu_model == NULL) {
                     65:         cpu_model = "crisv32";
                     66:     }
                     67:     env = cpu_init(cpu_model);
                     68:     qemu_register_reset(main_cpu_reset, env);
                     69: 
                     70:     /* allocate RAM */
1.1.1.2   root       71:     phys_ram = qemu_ram_alloc(ram_size);
                     72:     cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
1.1       root       73: 
1.1.1.2   root       74:     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the 
                     75:        internal memory.  */
                     76:     phys_intmem = qemu_ram_alloc(INTMEM_SIZE);
                     77:     cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
                     78:                                  phys_intmem | IO_MEM_RAM);
                     79: 
                     80: 
                     81:     phys_flash = qemu_ram_alloc(FLASH_SIZE);
                     82:     i = drive_get_index(IF_PFLASH, 0, 0);
                     83:     pflash_cfi02_register(0x0, phys_flash,
                     84:                           i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),
                     85:                           FLASH_SIZE >> 16,
                     86:                           1, 2, 0x0000, 0x0000, 0x0000, 0x0000,
                     87:                           0x555, 0x2aa);
1.1.1.4 ! root       88:     cpu_irq = cris_pic_init_cpu(env);
        !            89:     dev = qdev_create(NULL, "etraxfs,pic");
        !            90:     /* FIXME: Is there a proper way to signal vectors to the CPU core?  */
        !            91:     qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
        !            92:     qdev_init(dev);
        !            93:     s = sysbus_from_qdev(dev);
        !            94:     sysbus_mmio_map(s, 0, 0x3001c000);
        !            95:     sysbus_connect_irq(s, 0, cpu_irq[0]);
        !            96:     sysbus_connect_irq(s, 1, cpu_irq[1]);
        !            97:     for (i = 0; i < 30; i++) {
        !            98:         irq[i] = qdev_get_gpio_in(dev, i);
        !            99:     }
        !           100:     nmi[0] = qdev_get_gpio_in(dev, 30);
        !           101:     nmi[1] = qdev_get_gpio_in(dev, 31);
        !           102: 
        !           103:     etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
1.1.1.2   root      104:     for (i = 0; i < 10; i++) {
                    105:         /* On ETRAX, odd numbered channels are inputs.  */
1.1.1.4 ! root      106:         etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
1.1       root      107:     }
                    108: 
1.1.1.2   root      109:     /* Add the two ethernet blocks.  */
1.1.1.4 ! root      110:     eth[0] = etraxfs_eth_init(&nd_table[0], 0x30034000, 1);
1.1.1.2   root      111:     if (nb_nics > 1)
1.1.1.4 ! root      112:         eth[1] = etraxfs_eth_init(&nd_table[1], 0x30036000, 2);
1.1.1.2   root      113: 
                    114:     /* The DMA Connector block is missing, hardwire things for now.  */
                    115:     etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);
                    116:     etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);
                    117:     if (eth[1]) {
                    118:         etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);
                    119:         etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);
                    120:     }
1.1       root      121: 
1.1.1.2   root      122:     /* 2 timers.  */
1.1.1.4 ! root      123:     sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
        !           124:     sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
1.1.1.2   root      125: 
                    126:     for (i = 0; i < 4; i++) {
1.1.1.4 ! root      127:         sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
        !           128:                              irq[0x14 + i]); 
1.1.1.2   root      129:     }
1.1       root      130: 
1.1.1.2   root      131:     if (kernel_filename) {
                    132:         uint64_t entry, high;
                    133:         int kcmdline_len;
                    134: 
                    135:         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
                    136:            devboard SDK.  */
                    137:         kernel_size = load_elf(kernel_filename, -0x80000000LL,
                    138:                                &entry, NULL, &high);
                    139:         bootstrap_pc = entry;
                    140:         if (kernel_size < 0) {
                    141:             /* Takes a kimage from the axis devboard SDK.  */
1.1.1.4 ! root      142:             kernel_size = load_image_targphys(kernel_filename, 0x40004000,
        !           143:                                               ram_size);
1.1.1.2   root      144:             bootstrap_pc = 0x40004000;
                    145:             env->regs[9] = 0x40004000 + kernel_size;
                    146:         }
                    147:         env->regs[8] = 0x56902387; /* RAM init magic.  */
                    148: 
                    149:         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
                    150:             if (kcmdline_len > 256) {
                    151:                 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
                    152:                 exit(1);
                    153:             }
                    154:             /* Let the kernel know we are modifying the cmdline.  */
                    155:             env->regs[10] = 0x87109563;
1.1.1.3   root      156:             env->regs[11] = 0x40000000;
                    157:             pstrcpy_targphys(env->regs[11], 256, kernel_cmdline);
1.1.1.2   root      158:         }
                    159:     }
                    160:     env->pc = bootstrap_pc;
1.1       root      161: 
1.1.1.2   root      162:     printf ("pc =%x\n", env->pc);
                    163:     printf ("ram size =%ld\n", ram_size);
1.1       root      164: }
                    165: 
1.1.1.4 ! root      166: static QEMUMachine bareetraxfs_machine = {
1.1.1.2   root      167:     .name = "bareetraxfs",
                    168:     .desc = "Bare ETRAX FS board",
                    169:     .init = bareetraxfs_init,
1.1.1.4 ! root      170:     .is_default = 1,
1.1       root      171: };
1.1.1.4 ! root      172: 
        !           173: static void bareetraxfs_machine_init(void)
        !           174: {
        !           175:     qemu_register_machine(&bareetraxfs_machine);
        !           176: }
        !           177: 
        !           178: machine_init(bareetraxfs_machine_init);

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