mtk lk阶段的lcm流程

1. vendor/mediatek/proprietary/bootable/bootloader/lk/arch/arm/srt0.S

1 bl        kmain

2. vendor/mediatek/proprietary/bootable/bootloader/lk/kernel/main.c

 1 void kmain(void)
 2 {
 3 #if !defined(MACH_FPGA) && !defined(SB_LK_BRINGUP)
 4     boot_time = get_timer(0);
 5 #endif
 6 
 7     // get us into some sort of thread context
 8     thread_init_early();
 9 
10     // early arch stuff
11     arch_early_init();
12 
13     // do any super early platform initialization
14     platform_early_init();
15 
16 #if defined(MACH_FPGA) || defined(SB_LK_BRINGUP)
17     boot_time = get_timer(0);
18 #endif
19 
20     // do any super early target initialization
21     target_early_init();
22 
23     dprintf(INFO, "welcome to lk\n\n");
24     
25     // deal with any static constructors
26     dprintf(SPEW, "calling constructors\n");
27     call_constructors();
28 
29     // bring up the kernel heap
30     dprintf(SPEW, "initializing heap\n");
31     heap_init();
32 
33     // initialize the threading system
34     dprintf(SPEW, "initializing threads\n");
35     thread_init();
36 
37     // initialize the dpc system
38     dprintf(SPEW, "initializing dpc\n");
39     dpc_init();
40 
41     // initialize kernel timers
42     dprintf(SPEW, "initializing timers\n");
43     timer_init();
44 
45 #ifdef  MTK_LK_IRRX_SUPPORT
46    mtk_ir_init(0);
47 #endif
48 
49 
50 #if (!ENABLE_NANDWRITE)
51     // create a thread to complete system initialization
52     dprintf(SPEW, "creating bootstrap completion thread\n");
53     thread_resume(thread_create("bootstrap2", &bootstrap2, NULL, DEFAULT_PRIORITY, DEFAULT_STACK_SIZE));
54 
55     // enable interrupts
56     exit_critical_section();
57 
58     // become the idle thread
59     thread_become_idle();
60 #else
61         bootstrap_nandwrite();
62 #endif
63 }