1 /* 2 * Copyright 2021-2022, Haiku, Inc. All rights reserved. 3 * Released under the terms of the MIT License. 4 */ 5 6 7 #include "arch_smp.h" 8 9 #include <string.h> 10 11 #include <KernelExport.h> 12 13 #include <kernel.h> 14 #include <safemode.h> 15 #include <boot/platform.h> 16 #include <boot/stage2.h> 17 #include <boot/menu.h> 18 19 20 //#define TRACE_SMP 21 #ifdef TRACE_SMP 22 # define TRACE(x) dprintf x 23 #else 24 # define TRACE(x) ; 25 #endif 26 27 28 void arch_smp_register_cpu(platform_cpu_info ** cpu)29arch_smp_register_cpu(platform_cpu_info** cpu) 30 { 31 dprintf("TODO: arch_smp_register_cpu()\n"); 32 } 33 34 35 int arch_smp_get_current_cpu(void)36arch_smp_get_current_cpu(void) 37 { 38 // One cpu for now. 39 return 0; 40 } 41 42 43 void arch_smp_init_other_cpus(void)44arch_smp_init_other_cpus(void) 45 { 46 // One cpu for now. 47 gKernelArgs.num_cpus = 1; 48 return; 49 } 50 51 52 void arch_smp_boot_other_cpus(uint32 pml4,uint64 kernelEntry,addr_t virtKernelArgs)53arch_smp_boot_other_cpus(uint32 pml4, uint64 kernelEntry, addr_t virtKernelArgs) 54 { 55 // One cpu for now. 56 } 57 58 59 void arch_smp_add_safemode_menus(Menu * menu)60arch_smp_add_safemode_menus(Menu *menu) 61 { 62 MenuItem *item; 63 64 if (gKernelArgs.num_cpus < 2) 65 return; 66 67 item = new(nothrow) MenuItem("Disable SMP"); 68 menu->AddItem(item); 69 item->SetData(B_SAFEMODE_DISABLE_SMP); 70 item->SetType(MENU_ITEM_MARKABLE); 71 item->SetHelpText("Disables all but one CPU core."); 72 } 73 74 75 void arch_smp_init(void)76arch_smp_init(void) 77 { 78 // One cpu for now. 79 } 80