e4d65228b5
- Move a bit of the shared logic of secondary bootstrapping into a new function, lk_secondary_cpu_entry_early() which sets the current cpu pointer before calling the first half of the secondary LK_INIT routines. - Create the per cpu idle threads on the main cpu instead of the secondary as they come up. - Tweak all of the SMP capable architectures to use this new path. - Move the top level mp routines into a separate file top/mp.c - A bit more correctly ifdef out more SMP code.
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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* Copyright (c) 2013-2015 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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/*
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* Main entry point to the OS. Initializes modules in order and creates
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* the default thread.
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*/
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#include <lk/main.h>
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#include <app.h>
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#include <arch.h>
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#include <kernel/init.h>
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#include <kernel/mutex.h>
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#include <kernel/novm.h>
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#include <kernel/thread.h>
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#include <lib/heap.h>
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#include <lk/compiler.h>
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#include <lk/debug.h>
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#include <lk/init.h>
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#include <platform.h>
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#include <target.h>
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/* saved boot arguments from whoever loaded the system */
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ulong lk_boot_args[4];
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extern void (*__ctor_list[])(void);
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extern void (*__ctor_end[])(void);
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extern int __bss_start;
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extern int _end;
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static int bootstrap2(void *arg);
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static void call_constructors(void) {
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void (**ctor)(void);
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ctor = __ctor_list;
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while (ctor != __ctor_end) {
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void (*func)(void);
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func = *ctor;
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func();
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ctor++;
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}
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}
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// Main C entry point of the system, called from arch code on the boot cpu.
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void lk_main(ulong arg0, ulong arg1, ulong arg2, ulong arg3) {
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// save the boot args
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lk_boot_args[0] = arg0;
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lk_boot_args[1] = arg1;
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lk_boot_args[2] = arg2;
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lk_boot_args[3] = arg3;
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// get us into some sort of thread context
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thread_init_early();
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// early arch stuff
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lk_primary_cpu_init_level(LK_INIT_LEVEL_EARLIEST, LK_INIT_LEVEL_ARCH_EARLY - 1);
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arch_early_init();
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// do any super early platform initialization
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lk_primary_cpu_init_level(LK_INIT_LEVEL_ARCH_EARLY, LK_INIT_LEVEL_PLATFORM_EARLY - 1);
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platform_early_init();
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// do any super early target initialization
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lk_primary_cpu_init_level(LK_INIT_LEVEL_PLATFORM_EARLY, LK_INIT_LEVEL_TARGET_EARLY - 1);
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target_early_init();
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#if WITH_SMP
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dprintf(INFO, "\nwelcome to lk/MP\n\n");
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#else
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dprintf(INFO, "\nwelcome to lk\n\n");
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#endif
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dprintf(INFO, "boot args 0x%lx 0x%lx 0x%lx 0x%lx\n",
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lk_boot_args[0], lk_boot_args[1], lk_boot_args[2], lk_boot_args[3]);
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// bring up the kernel heap
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lk_primary_cpu_init_level(LK_INIT_LEVEL_TARGET_EARLY, LK_INIT_LEVEL_HEAP - 1);
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dprintf(SPEW, "initializing heap\n");
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heap_init();
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// deal with any static constructors
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dprintf(SPEW, "calling constructors\n");
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call_constructors();
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// initialize the kernel
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lk_primary_cpu_init_level(LK_INIT_LEVEL_HEAP, LK_INIT_LEVEL_KERNEL - 1);
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kernel_init();
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lk_primary_cpu_init_level(LK_INIT_LEVEL_KERNEL, LK_INIT_LEVEL_THREADING - 1);
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// create a thread to complete system initialization
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dprintf(SPEW, "creating bootstrap completion thread\n");
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thread_t *t = thread_create("bootstrap2", &bootstrap2, NULL, DEFAULT_PRIORITY, DEFAULT_STACK_SIZE);
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thread_set_pinned_cpu(t, 0);
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thread_detach(t);
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thread_resume(t);
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// become the idle thread and enable interrupts to start the scheduler
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thread_become_idle();
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}
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static int bootstrap2(void *arg) {
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dprintf(SPEW, "top of bootstrap2()\n");
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lk_primary_cpu_init_level(LK_INIT_LEVEL_THREADING, LK_INIT_LEVEL_ARCH - 1);
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arch_init();
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// initialize the rest of the platform
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dprintf(SPEW, "initializing platform\n");
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lk_primary_cpu_init_level(LK_INIT_LEVEL_ARCH, LK_INIT_LEVEL_PLATFORM - 1);
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platform_init();
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// initialize the target
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dprintf(SPEW, "initializing target\n");
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lk_primary_cpu_init_level(LK_INIT_LEVEL_PLATFORM, LK_INIT_LEVEL_TARGET - 1);
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target_init();
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dprintf(SPEW, "initializing apps\n");
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lk_primary_cpu_init_level(LK_INIT_LEVEL_TARGET, LK_INIT_LEVEL_APPS - 1);
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apps_init();
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lk_primary_cpu_init_level(LK_INIT_LEVEL_APPS, LK_INIT_LEVEL_LAST);
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return 0;
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}
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