| /* |
| * QEMU model of the LatticeMico32 system control block. |
| * |
| * Copyright (c) 2010 Michael Walle <michael@walle.cc> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * This model is mainly intended for testing purposes and doesn't fit to any |
| * real hardware. On the one hand it provides a control register (R_CTRL) on |
| * the other hand it supports the lm32 tests. |
| * |
| * A write to the control register causes a system shutdown. |
| * Tests first write the pointer to a test name to the test name register |
| * (R_TESTNAME) and then write a zero to the pass/fail register (R_PASSFAIL) if |
| * the test is passed or any non-zero value to it if the test is failed. |
| */ |
| |
| #include "hw/hw.h" |
| #include "hw/sysbus.h" |
| #include "trace.h" |
| #include "qemu/log.h" |
| #include "qemu/error-report.h" |
| #include "sysemu/sysemu.h" |
| #include "qemu/log.h" |
| |
| enum { |
| R_CTRL = 0, |
| R_PASSFAIL, |
| R_TESTNAME, |
| R_MAX |
| }; |
| |
| #define MAX_TESTNAME_LEN 16 |
| |
| struct LM32SysState { |
| SysBusDevice busdev; |
| MemoryRegion iomem; |
| uint32_t base; |
| uint32_t regs[R_MAX]; |
| uint8_t testname[MAX_TESTNAME_LEN]; |
| }; |
| typedef struct LM32SysState LM32SysState; |
| |
| static void copy_testname(LM32SysState *s) |
| { |
| cpu_physical_memory_read(s->regs[R_TESTNAME], s->testname, |
| MAX_TESTNAME_LEN); |
| s->testname[MAX_TESTNAME_LEN - 1] = '\0'; |
| } |
| |
| static void sys_write(void *opaque, hwaddr addr, |
| uint64_t value, unsigned size) |
| { |
| LM32SysState *s = opaque; |
| char *testname; |
| |
| trace_lm32_sys_memory_write(addr, value); |
| |
| addr >>= 2; |
| switch (addr) { |
| case R_CTRL: |
| qemu_system_shutdown_request(); |
| break; |
| case R_PASSFAIL: |
| s->regs[addr] = value; |
| testname = (char *)s->testname; |
| qemu_log("TC %-16s %s\n", testname, (value) ? "FAILED" : "OK"); |
| break; |
| case R_TESTNAME: |
| s->regs[addr] = value; |
| copy_testname(s); |
| break; |
| |
| default: |
| error_report("lm32_sys: write access to unknown register 0x" |
| TARGET_FMT_plx, addr << 2); |
| break; |
| } |
| } |
| |
| static bool sys_ops_accepts(void *opaque, hwaddr addr, |
| unsigned size, bool is_write) |
| { |
| return is_write && size == 4; |
| } |
| |
| static const MemoryRegionOps sys_ops = { |
| .write = sys_write, |
| .valid.accepts = sys_ops_accepts, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static void sys_reset(DeviceState *d) |
| { |
| LM32SysState *s = container_of(d, LM32SysState, busdev.qdev); |
| int i; |
| |
| for (i = 0; i < R_MAX; i++) { |
| s->regs[i] = 0; |
| } |
| memset(s->testname, 0, MAX_TESTNAME_LEN); |
| } |
| |
| static int lm32_sys_init(SysBusDevice *dev) |
| { |
| LM32SysState *s = FROM_SYSBUS(typeof(*s), dev); |
| |
| memory_region_init_io(&s->iomem, &sys_ops , s, "sys", R_MAX * 4); |
| sysbus_init_mmio(dev, &s->iomem); |
| |
| /* Note: This device is not created in the board initialization, |
| * instead it has to be added with the -device parameter. Therefore, |
| * the device maps itself. */ |
| sysbus_mmio_map(dev, 0, s->base); |
| |
| return 0; |
| } |
| |
| static const VMStateDescription vmstate_lm32_sys = { |
| .name = "lm32-sys", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .minimum_version_id_old = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32_ARRAY(regs, LM32SysState, R_MAX), |
| VMSTATE_BUFFER(testname, LM32SysState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static Property lm32_sys_properties[] = { |
| DEFINE_PROP_UINT32("base", LM32SysState, base, 0xffff0000), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void lm32_sys_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| |
| k->init = lm32_sys_init; |
| dc->reset = sys_reset; |
| dc->vmsd = &vmstate_lm32_sys; |
| dc->props = lm32_sys_properties; |
| } |
| |
| static const TypeInfo lm32_sys_info = { |
| .name = "lm32-sys", |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(LM32SysState), |
| .class_init = lm32_sys_class_init, |
| }; |
| |
| static void lm32_sys_register_types(void) |
| { |
| type_register_static(&lm32_sys_info); |
| } |
| |
| type_init(lm32_sys_register_types) |