diff options
Diffstat (limited to 'hw/hppa/machine.c')
| -rw-r--r-- | hw/hppa/machine.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c index de92525..d459ba6 100644 --- a/hw/hppa/machine.c +++ b/hw/hppa/machine.c @@ -103,6 +103,63 @@ static ISABus *hppa_isa_bus(void) return isa_bus; } +/* + * Helper functions to emulate RTC clock and DebugOutputPort + */ +static time_t rtc_ref; + +static uint64_t io_cpu_read(void *opaque, hwaddr addr, unsigned size) +{ + uint64_t val = 0; + + switch (addr) { + case 0: /* RTC clock */ + val = time(NULL); + val += rtc_ref; + break; + case 8: /* DebugOutputPort */ + return 0xe9; /* readback */ + } + return val; +} + +static void io_cpu_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + unsigned char ch; + Chardev *debugout; + + switch (addr) { + case 0: /* RTC clock */ + rtc_ref = val - time(NULL); + break; + case 8: /* DebugOutputPort */ + ch = val; + debugout = serial_hd(0); + if (debugout) { + qemu_chr_fe_write_all(debugout->be, &ch, 1); + } else { + fprintf(stderr, "%c", ch); + } + break; + } +} + +static const MemoryRegionOps hppa_io_helper_ops = { + .read = io_cpu_read, + .write = io_cpu_write, + .endianness = DEVICE_BIG_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 8, + }, + .impl = { + .min_access_size = 1, + .max_access_size = 8, + }, +}; + + static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr) { addr &= (0x10000000 - 1); @@ -151,6 +208,10 @@ static FWCfgState *create_fw_cfg(MachineState *ms, PCIBus *pci_bus) fw_cfg_add_file(fw_cfg, "/etc/hppa/power-button-addr", g_memdup(&val, sizeof(val)), sizeof(val)); + val = cpu_to_le64(CPU_HPA + 16); + fw_cfg_add_file(fw_cfg, "/etc/hppa/rtc-addr", + g_memdup(&val, sizeof(val)), sizeof(val)); + val = cpu_to_le64(CPU_HPA + 24); fw_cfg_add_file(fw_cfg, "/etc/hppa/DebugOutputPort", g_memdup(&val, sizeof(val)), sizeof(val)); @@ -222,6 +283,12 @@ static void machine_hppa_init(MachineState *machine) g_free(name); } + /* RTC and DebugOutputPort on CPU #0 */ + cpu_region = g_new(MemoryRegion, 1); + memory_region_init_io(cpu_region, OBJECT(cpu[0]), &hppa_io_helper_ops, + cpu[0], "cpu0-io-rtc", 2 * sizeof(uint64_t)); + memory_region_add_subregion(addr_space, CPU_HPA + 16, cpu_region); + /* Main memory region. */ if (machine->ram_size > 3 * GiB) { error_report("RAM size is currently restricted to 3GB"); |