Annotation of qemu/hw/etraxfs.c, revision 1.1.1.5

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"
1.1.1.5 ! root       31: #include "loader.h"
        !            32: #include "elf.h"
1.1.1.2   root       33: 
                     34: #define FLASH_SIZE 0x2000000
                     35: #define INTMEM_SIZE (128 * 1024)
                     36: 
                     37: static uint32_t bootstrap_pc;
1.1       root       38: 
                     39: static void main_cpu_reset(void *opaque)
                     40: {
                     41:     CPUState *env = opaque;
                     42:     cpu_reset(env);
                     43: 
1.1.1.2   root       44:     env->pc = bootstrap_pc;
1.1       root       45: }
                     46: 
                     47: static
1.1.1.4   root       48: void bareetraxfs_init (ram_addr_t ram_size,
1.1.1.2   root       49:                        const char *boot_device,
1.1       root       50:                        const char *kernel_filename, const char *kernel_cmdline,
                     51:                        const char *initrd_filename, const char *cpu_model)
                     52: {
1.1.1.4   root       53:     DeviceState *dev;
                     54:     SysBusDevice *s;
1.1       root       55:     CPUState *env;
1.1.1.4   root       56:     qemu_irq irq[30], nmi[2], *cpu_irq; 
1.1.1.2   root       57:     void *etraxfs_dmac;
                     58:     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
1.1       root       59:     int kernel_size;
1.1.1.5 ! root       60:     DriveInfo *dinfo;
1.1.1.2   root       61:     int i;
                     62:     ram_addr_t phys_ram;
                     63:     ram_addr_t phys_flash;
                     64:     ram_addr_t phys_intmem;
1.1       root       65: 
                     66:     /* init CPUs */
                     67:     if (cpu_model == NULL) {
                     68:         cpu_model = "crisv32";
                     69:     }
                     70:     env = cpu_init(cpu_model);
                     71:     qemu_register_reset(main_cpu_reset, env);
                     72: 
                     73:     /* allocate RAM */
1.1.1.2   root       74:     phys_ram = qemu_ram_alloc(ram_size);
                     75:     cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
1.1       root       76: 
1.1.1.2   root       77:     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the 
                     78:        internal memory.  */
                     79:     phys_intmem = qemu_ram_alloc(INTMEM_SIZE);
                     80:     cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
                     81:                                  phys_intmem | IO_MEM_RAM);
                     82: 
                     83: 
                     84:     phys_flash = qemu_ram_alloc(FLASH_SIZE);
1.1.1.5 ! root       85:     dinfo = drive_get(IF_PFLASH, 0, 0);
1.1.1.2   root       86:     pflash_cfi02_register(0x0, phys_flash,
1.1.1.5 ! root       87:                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
1.1.1.2   root       88:                           FLASH_SIZE >> 16,
                     89:                           1, 2, 0x0000, 0x0000, 0x0000, 0x0000,
                     90:                           0x555, 0x2aa);
1.1.1.4   root       91:     cpu_irq = cris_pic_init_cpu(env);
                     92:     dev = qdev_create(NULL, "etraxfs,pic");
                     93:     /* FIXME: Is there a proper way to signal vectors to the CPU core?  */
                     94:     qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
1.1.1.5 ! root       95:     qdev_init_nofail(dev);
1.1.1.4   root       96:     s = sysbus_from_qdev(dev);
                     97:     sysbus_mmio_map(s, 0, 0x3001c000);
                     98:     sysbus_connect_irq(s, 0, cpu_irq[0]);
                     99:     sysbus_connect_irq(s, 1, cpu_irq[1]);
                    100:     for (i = 0; i < 30; i++) {
                    101:         irq[i] = qdev_get_gpio_in(dev, i);
                    102:     }
                    103:     nmi[0] = qdev_get_gpio_in(dev, 30);
                    104:     nmi[1] = qdev_get_gpio_in(dev, 31);
                    105: 
                    106:     etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
1.1.1.2   root      107:     for (i = 0; i < 10; i++) {
                    108:         /* On ETRAX, odd numbered channels are inputs.  */
1.1.1.4   root      109:         etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
1.1       root      110:     }
                    111: 
1.1.1.2   root      112:     /* Add the two ethernet blocks.  */
1.1.1.4   root      113:     eth[0] = etraxfs_eth_init(&nd_table[0], 0x30034000, 1);
1.1.1.2   root      114:     if (nb_nics > 1)
1.1.1.4   root      115:         eth[1] = etraxfs_eth_init(&nd_table[1], 0x30036000, 2);
1.1.1.2   root      116: 
                    117:     /* The DMA Connector block is missing, hardwire things for now.  */
                    118:     etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);
                    119:     etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);
                    120:     if (eth[1]) {
                    121:         etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);
                    122:         etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);
                    123:     }
1.1       root      124: 
1.1.1.2   root      125:     /* 2 timers.  */
1.1.1.4   root      126:     sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
                    127:     sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
1.1.1.2   root      128: 
                    129:     for (i = 0; i < 4; i++) {
1.1.1.4   root      130:         sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
                    131:                              irq[0x14 + i]); 
1.1.1.2   root      132:     }
1.1       root      133: 
1.1.1.2   root      134:     if (kernel_filename) {
                    135:         uint64_t entry, high;
                    136:         int kcmdline_len;
                    137: 
                    138:         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
                    139:            devboard SDK.  */
                    140:         kernel_size = load_elf(kernel_filename, -0x80000000LL,
1.1.1.5 ! root      141:                                &entry, NULL, &high, 0, ELF_MACHINE, 0);
1.1.1.2   root      142:         bootstrap_pc = entry;
                    143:         if (kernel_size < 0) {
                    144:             /* Takes a kimage from the axis devboard SDK.  */
1.1.1.4   root      145:             kernel_size = load_image_targphys(kernel_filename, 0x40004000,
                    146:                                               ram_size);
1.1.1.2   root      147:             bootstrap_pc = 0x40004000;
                    148:             env->regs[9] = 0x40004000 + kernel_size;
                    149:         }
                    150:         env->regs[8] = 0x56902387; /* RAM init magic.  */
                    151: 
                    152:         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
                    153:             if (kcmdline_len > 256) {
                    154:                 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
                    155:                 exit(1);
                    156:             }
                    157:             /* Let the kernel know we are modifying the cmdline.  */
                    158:             env->regs[10] = 0x87109563;
1.1.1.3   root      159:             env->regs[11] = 0x40000000;
1.1.1.5 ! root      160:             pstrcpy_targphys("cmdline", env->regs[11], 256, kernel_cmdline);
1.1.1.2   root      161:         }
                    162:     }
                    163:     env->pc = bootstrap_pc;
1.1       root      164: 
1.1.1.2   root      165:     printf ("pc =%x\n", env->pc);
                    166:     printf ("ram size =%ld\n", ram_size);
1.1       root      167: }
                    168: 
1.1.1.4   root      169: static QEMUMachine bareetraxfs_machine = {
1.1.1.2   root      170:     .name = "bareetraxfs",
                    171:     .desc = "Bare ETRAX FS board",
                    172:     .init = bareetraxfs_init,
1.1.1.4   root      173:     .is_default = 1,
1.1       root      174: };
1.1.1.4   root      175: 
                    176: static void bareetraxfs_machine_init(void)
                    177: {
                    178:     qemu_register_machine(&bareetraxfs_machine);
                    179: }
                    180: 
                    181: machine_init(bareetraxfs_machine_init);

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