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-rw-r--r--hw/xtensa/xtensa_lx60.c315
1 files changed, 315 insertions, 0 deletions
diff --git a/hw/xtensa/xtensa_lx60.c b/hw/xtensa/xtensa_lx60.c
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+++ b/hw/xtensa/xtensa_lx60.c
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+/*
+ * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the Open Source and Linux Lab nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "sysemu/sysemu.h"
+#include "hw/boards.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "exec/memory.h"
+#include "exec/address-spaces.h"
+#include "hw/serial.h"
+#include "net/net.h"
+#include "hw/sysbus.h"
+#include "hw/flash.h"
+#include "sysemu/blockdev.h"
+#include "char/char.h"
+#include "hw/xtensa_bootparam.h"
+
+typedef struct LxBoardDesc {
+ size_t flash_size;
+ size_t flash_sector_size;
+ size_t sram_size;
+} LxBoardDesc;
+
+typedef struct Lx60FpgaState {
+ MemoryRegion iomem;
+ uint32_t leds;
+ uint32_t switches;
+} Lx60FpgaState;
+
+static void lx60_fpga_reset(void *opaque)
+{
+ Lx60FpgaState *s = opaque;
+
+ s->leds = 0;
+ s->switches = 0;
+}
+
+static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ Lx60FpgaState *s = opaque;
+
+ switch (addr) {
+ case 0x0: /*build date code*/
+ return 0x09272011;
+
+ case 0x4: /*processor clock frequency, Hz*/
+ return 10000000;
+
+ case 0x8: /*LEDs (off = 0, on = 1)*/
+ return s->leds;
+
+ case 0xc: /*DIP switches (off = 0, on = 1)*/
+ return s->switches;
+ }
+ return 0;
+}
+
+static void lx60_fpga_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ Lx60FpgaState *s = opaque;
+
+ switch (addr) {
+ case 0x8: /*LEDs (off = 0, on = 1)*/
+ s->leds = val;
+ break;
+
+ case 0x10: /*board reset*/
+ if (val == 0xdead) {
+ qemu_system_reset_request();
+ }
+ break;
+ }
+}
+
+static const MemoryRegionOps lx60_fpga_ops = {
+ .read = lx60_fpga_read,
+ .write = lx60_fpga_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
+ hwaddr base)
+{
+ Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
+
+ memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,
+ "lx60.fpga", 0x10000);
+ memory_region_add_subregion(address_space, base, &s->iomem);
+ lx60_fpga_reset(s);
+ qemu_register_reset(lx60_fpga_reset, s);
+ return s;
+}
+
+static void lx60_net_init(MemoryRegion *address_space,
+ hwaddr base,
+ hwaddr descriptors,
+ hwaddr buffers,
+ qemu_irq irq, NICInfo *nd)
+{
+ DeviceState *dev;
+ SysBusDevice *s;
+ MemoryRegion *ram;
+
+ dev = qdev_create(NULL, "open_eth");
+ qdev_set_nic_properties(dev, nd);
+ qdev_init_nofail(dev);
+
+ s = SYS_BUS_DEVICE(dev);
+ sysbus_connect_irq(s, 0, irq);
+ memory_region_add_subregion(address_space, base,
+ sysbus_mmio_get_region(s, 0));
+ memory_region_add_subregion(address_space, descriptors,
+ sysbus_mmio_get_region(s, 1));
+
+ ram = g_malloc(sizeof(*ram));
+ memory_region_init_ram(ram, "open_eth.ram", 16384);
+ vmstate_register_ram_global(ram);
+ memory_region_add_subregion(address_space, buffers, ram);
+}
+
+static uint64_t translate_phys_addr(void *env, uint64_t addr)
+{
+ return cpu_get_phys_page_debug(env, addr);
+}
+
+static void lx60_reset(void *opaque)
+{
+ XtensaCPU *cpu = opaque;
+
+ cpu_reset(CPU(cpu));
+}
+
+static void lx_init(const LxBoardDesc *board, QEMUMachineInitArgs *args)
+{
+#ifdef TARGET_WORDS_BIGENDIAN
+ int be = 1;
+#else
+ int be = 0;
+#endif
+ MemoryRegion *system_memory = get_system_memory();
+ XtensaCPU *cpu = NULL;
+ CPUXtensaState *env = NULL;
+ MemoryRegion *ram, *rom, *system_io;
+ DriveInfo *dinfo;
+ pflash_t *flash = NULL;
+ const char *cpu_model = args->cpu_model;
+ const char *kernel_filename = args->kernel_filename;
+ const char *kernel_cmdline = args->kernel_cmdline;
+ int n;
+
+ if (!cpu_model) {
+ cpu_model = XTENSA_DEFAULT_CPU_MODEL;
+ }
+
+ for (n = 0; n < smp_cpus; n++) {
+ cpu = cpu_xtensa_init(cpu_model);
+ if (cpu == NULL) {
+ fprintf(stderr, "Unable to find CPU definition\n");
+ exit(1);
+ }
+ env = &cpu->env;
+
+ env->sregs[PRID] = n;
+ qemu_register_reset(lx60_reset, cpu);
+ /* Need MMU initialized prior to ELF loading,
+ * so that ELF gets loaded into virtual addresses
+ */
+ cpu_reset(CPU(cpu));
+ }
+
+ ram = g_malloc(sizeof(*ram));
+ memory_region_init_ram(ram, "lx60.dram", args->ram_size);
+ vmstate_register_ram_global(ram);
+ memory_region_add_subregion(system_memory, 0, ram);
+
+ system_io = g_malloc(sizeof(*system_io));
+ memory_region_init(system_io, "lx60.io", 224 * 1024 * 1024);
+ memory_region_add_subregion(system_memory, 0xf0000000, system_io);
+ lx60_fpga_init(system_io, 0x0d020000);
+ if (nd_table[0].used) {
+ lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
+ xtensa_get_extint(env, 1), nd_table);
+ }
+
+ if (!serial_hds[0]) {
+ serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
+ }
+
+ serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
+ 115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
+
+ dinfo = drive_get(IF_PFLASH, 0, 0);
+ if (dinfo) {
+ flash = pflash_cfi01_register(0xf8000000,
+ NULL, "lx60.io.flash", board->flash_size,
+ dinfo->bdrv, board->flash_sector_size,
+ board->flash_size / board->flash_sector_size,
+ 4, 0x0000, 0x0000, 0x0000, 0x0000, be);
+ if (flash == NULL) {
+ fprintf(stderr, "Unable to mount pflash\n");
+ exit(1);
+ }
+ }
+
+ /* Use presence of kernel file name as 'boot from SRAM' switch. */
+ if (kernel_filename) {
+ rom = g_malloc(sizeof(*rom));
+ memory_region_init_ram(rom, "lx60.sram", board->sram_size);
+ vmstate_register_ram_global(rom);
+ memory_region_add_subregion(system_memory, 0xfe000000, rom);
+
+ /* Put kernel bootparameters to the end of that SRAM */
+ if (kernel_cmdline) {
+ size_t cmdline_size = strlen(kernel_cmdline) + 1;
+ size_t bp_size = sizeof(BpTag[4]) + cmdline_size;
+ uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;
+
+ env->regs[2] = tagptr;
+
+ tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);
+ if (cmdline_size > 1) {
+ tagptr = put_tag(tagptr, 0x1001,
+ cmdline_size, kernel_cmdline);
+ }
+ tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);
+ }
+ uint64_t elf_entry;
+ uint64_t elf_lowaddr;
+ int success = load_elf(kernel_filename, translate_phys_addr, env,
+ &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
+ if (success > 0) {
+ env->pc = elf_entry;
+ }
+ } else {
+ if (flash) {
+ MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
+ MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));
+
+ memory_region_init_alias(flash_io, "lx60.flash",
+ flash_mr, 0, board->flash_size);
+ memory_region_add_subregion(system_memory, 0xfe000000,
+ flash_io);
+ }
+ }
+}
+
+static void xtensa_lx60_init(QEMUMachineInitArgs *args)
+{
+ static const LxBoardDesc lx60_board = {
+ .flash_size = 0x400000,
+ .flash_sector_size = 0x10000,
+ .sram_size = 0x20000,
+ };
+ lx_init(&lx60_board, args);
+}
+
+static void xtensa_lx200_init(QEMUMachineInitArgs *args)
+{
+ static const LxBoardDesc lx200_board = {
+ .flash_size = 0x1000000,
+ .flash_sector_size = 0x20000,
+ .sram_size = 0x2000000,
+ };
+ lx_init(&lx200_board, args);
+}
+
+static QEMUMachine xtensa_lx60_machine = {
+ .name = "lx60",
+ .desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
+ .init = xtensa_lx60_init,
+ .max_cpus = 4,
+ DEFAULT_MACHINE_OPTIONS,
+};
+
+static QEMUMachine xtensa_lx200_machine = {
+ .name = "lx200",
+ .desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
+ .init = xtensa_lx200_init,
+ .max_cpus = 4,
+ DEFAULT_MACHINE_OPTIONS,
+};
+
+static void xtensa_lx_machines_init(void)
+{
+ qemu_register_machine(&xtensa_lx60_machine);
+ qemu_register_machine(&xtensa_lx200_machine);
+}
+
+machine_init(xtensa_lx_machines_init);
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