void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size, const char *boot_device, BusState *idebus0, BusState *idebus1, FDCtrl *floppy_controller, ISADevice *s) { int val; int fd0, fd1, nb; static pc_cmos_init_late_arg arg; /* various important CMOS locations needed by PC/Bochs bios */ /* memory size */ val = 640; /* base memory in K */ rtc_set_memory(s, 0x15, val); rtc_set_memory(s, 0x16, val >> 8); val = (ram_size / 1024) - 1024; if (val > 65535) val = 65535; rtc_set_memory(s, 0x17, val); rtc_set_memory(s, 0x18, val >> 8); rtc_set_memory(s, 0x30, val); rtc_set_memory(s, 0x31, val >> 8); if (above_4g_mem_size) { rtc_set_memory(s, 0x5b, (unsigned int)above_4g_mem_size >> 16); rtc_set_memory(s, 0x5c, (unsigned int)above_4g_mem_size >> 24); rtc_set_memory(s, 0x5d, (uint64_t)above_4g_mem_size >> 32); } if (ram_size > (16 * 1024 * 1024)) val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536); else val = 0; if (val > 65535) val = 65535; rtc_set_memory(s, 0x34, val); rtc_set_memory(s, 0x35, val >> 8); /* set the number of CPU */ rtc_set_memory(s, 0x5f, smp_cpus - 1); /* set boot devices, and disable floppy signature check if requested */ if (set_boot_dev(s, boot_device, fd_bootchk)) { exit(1); } /* floppy type */ fd0 = fdctrl_get_drive_type(floppy_controller, 0); fd1 = fdctrl_get_drive_type(floppy_controller, 1); val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1); rtc_set_memory(s, 0x10, val); val = 0; nb = 0; if (fd0 < 3) nb++; if (fd1 < 3) nb++; switch (nb) { case 0: break; case 1: val |= 0x01; /* 1 drive, ready for boot */ break; case 2: val |= 0x41; /* 2 drives, ready for boot */ break; } val |= 0x02; /* FPU is there */ val |= 0x04; /* PS/2 mouse installed */ rtc_set_memory(s, REG_EQUIPMENT_BYTE, val); /* hard drives */ arg.rtc_state = s; arg.idebus0 = idebus0; arg.idebus1 = idebus1; qemu_register_reset(pc_cmos_init_late, &arg); }
void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size, const char *boot_device, ISADevice *floppy, BusState *idebus0, BusState *idebus1, ISADevice *s) { int val, nb, i; FDriveType fd_type[2] = { FDRIVE_DRV_NONE, FDRIVE_DRV_NONE }; static pc_cmos_init_late_arg arg; static RTCCPUHotplugArg cpu_hotplug_cb; /* various important CMOS locations needed by PC/Bochs bios */ /* memory size */ /* base memory (first MiB) */ val = MIN(ram_size / 1024, 640); rtc_set_memory(s, 0x15, val); rtc_set_memory(s, 0x16, val >> 8); /* extememorynded memory (next 64MiB) */ if (ram_size > 1024 * 1024) { val = (ram_size - 1024 * 1024) / 1024; } else { val = 0; } if (val > 65535) val = 65535; rtc_set_memory(s, 0x17, val); rtc_set_memory(s, 0x18, val >> 8); rtc_set_memory(s, 0x30, val); rtc_set_memory(s, 0x31, val >> 8); /* memory between 16MiB and 4GiB */ if (ram_size > 16 * 1024 * 1024) { val = (ram_size - 16 * 1024 * 1024) / 65536; } else { val = 0; } if (val > 65535) val = 65535; rtc_set_memory(s, 0x34, val); rtc_set_memory(s, 0x35, val >> 8); /* memory above 4GiB */ val = above_4g_mem_size / 65536; rtc_set_memory(s, 0x5b, val); rtc_set_memory(s, 0x5c, val >> 8); rtc_set_memory(s, 0x5d, val >> 16); printf("qemu riscvpcat: CMOS- memory init successfully.\n"); /* set the number of CPU */ rtc_set_memory(s, 0x5f, smp_cpus - 1); /* init CPU hotplug notifier */ cpu_hotplug_cb.rtc_state = s; cpu_hotplug_cb.cpu_added_notifier.notify = rtc_notify_cpu_added; qemu_register_cpu_added_notifier(&cpu_hotplug_cb.cpu_added_notifier); printf("qemu riscvpcat: CMOS- cpu init successfully.\n"); //if (set_boot_dev(s, boot_device)) { // exit(1); //} //printf("qemu riscvpcat: CMOS- boot device init successfully.\n"); /* floppy type */ if (floppy) { for (i = 0; i < 2; i++) { // fd_type[i] = isa_fdc_get_drive_type(floppy, i); } } val = (cmos_get_fd_drive_type(fd_type[0]) << 4) | cmos_get_fd_drive_type(fd_type[1]); rtc_set_memory(s, 0x10, val); val = 0; nb = 0; if (fd_type[0] < FDRIVE_DRV_NONE) { nb++; } if (fd_type[1] < FDRIVE_DRV_NONE) { nb++; } switch (nb) { case 0: break; case 1: val |= 0x01; /* 1 drive, ready for boot */ break; case 2: val |= 0x41; /* 2 drives, ready for boot */ break; } val |= 0x02; /* FPU is there */ val |= 0x04; /* PS/2 mouse installed */ rtc_set_memory(s, REG_EQUIPMENT_BYTE, val); printf("qemu riscvpcat: floppy init successfully.\n"); return; // // (AC) Below causes exception. check it later... // /* hard drives */ arg.rtc_state = s; arg.idebus[0] = idebus0; arg.idebus[1] = idebus1; qemu_register_reset(pc_cmos_init_late, &arg); printf("qemu riscvpcat: CMOS- hard drives init successfully.\n"); }