1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/reboot.h> 4 #include <linux/serial_core.h> 5 #include <clocksource/timer-goldfish.h> 6 7 #include <asm/bootinfo.h> 8 #include <asm/bootinfo-virt.h> 9 #include <asm/byteorder.h> 10 #include <asm/machdep.h> 11 #include <asm/virt.h> 12 #include <asm/config.h> 13 14 struct virt_booter_data virt_bi_data; 15 16 static void virt_get_model(char *str) 17 { 18 /* str is 80 characters long */ 19 sprintf(str, "QEMU Virtual M68K Machine (%u.%u.%u)", 20 (u8)(virt_bi_data.qemu_version >> 24), 21 (u8)(virt_bi_data.qemu_version >> 16), 22 (u8)(virt_bi_data.qemu_version >> 8)); 23 } 24 static void virt_reset(void) 25 { 26 do_kernel_restart(NULL); 27 } 28 29 /* 30 * Parse a virtual-m68k-specific record in the bootinfo 31 */ 32 33 int __init virt_parse_bootinfo(const struct bi_record *record) 34 { 35 int unknown = 0; 36 const void *data = record->data; 37 38 switch (be16_to_cpu(record->tag)) { 39 case BI_VIRT_QEMU_VERSION: 40 virt_bi_data.qemu_version = be32_to_cpup(data); 41 break; 42 case BI_VIRT_GF_PIC_BASE: 43 virt_bi_data.pic.mmio = be32_to_cpup(data); 44 data += 4; 45 virt_bi_data.pic.irq = be32_to_cpup(data); 46 break; 47 case BI_VIRT_GF_RTC_BASE: 48 virt_bi_data.rtc.mmio = be32_to_cpup(data); 49 data += 4; 50 virt_bi_data.rtc.irq = be32_to_cpup(data); 51 break; 52 case BI_VIRT_GF_TTY_BASE: 53 virt_bi_data.tty.mmio = be32_to_cpup(data); 54 data += 4; 55 virt_bi_data.tty.irq = be32_to_cpup(data); 56 break; 57 case BI_VIRT_CTRL_BASE: 58 virt_bi_data.ctrl.mmio = be32_to_cpup(data); 59 data += 4; 60 virt_bi_data.ctrl.irq = be32_to_cpup(data); 61 break; 62 case BI_VIRT_VIRTIO_BASE: 63 virt_bi_data.virtio.mmio = be32_to_cpup(data); 64 data += 4; 65 virt_bi_data.virtio.irq = be32_to_cpup(data); 66 break; 67 default: 68 unknown = 1; 69 break; 70 } 71 return unknown; 72 } 73 74 static void __init virt_sched_init(void) 75 { 76 goldfish_timer_init(virt_bi_data.rtc.irq, 77 (void __iomem *)virt_bi_data.rtc.mmio); 78 } 79 80 void __init config_virt(void) 81 { 82 char earlycon[24]; 83 84 snprintf(earlycon, sizeof(earlycon), "early_gf_tty,0x%08x", 85 virt_bi_data.tty.mmio); 86 setup_earlycon(earlycon); 87 88 mach_init_IRQ = virt_init_IRQ; 89 mach_sched_init = virt_sched_init; 90 mach_get_model = virt_get_model; 91 mach_reset = virt_reset; 92 } 93