src/system/kernel/arch/arm/arch_debug_console.cpp

   1 /*
   2  * Copyright 2007, François Revol, revol@free.fr.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Copyright 2003-2006, Axel Dörfler, axeld@pinc-software.de.
   6  * Distributed under the terms of the MIT License.
   7  *
   8  * Copyright 2001, Travis Geiselbrecht. All rights reserved.
   9  * Distributed under the terms of the NewOS License.
  10  */
  11
  12
  13 //#include <arch_platform.h>
  14 #include <arch/debug_console.h>
  15 #include <arch/generic/debug_uart.h>
  16 #include <boot/kernel_args.h>
  17 #include <kernel.h>
  18 #include <vm/vm.h>
  19 #include <string.h>
  20
  21
  22 // TODO: Declare this in some header
  23 DebugUART *gArchDebugUART;
  24 extern DebugUART *debug_uart_from_fdt(const void *fdt);
  25
  26
  27 void
  28 arch_debug_remove_interrupt_handler(uint32 line)
  29 {
  30 }
  31
  32
  33 void
  34 arch_debug_install_interrupt_handlers(void)
  35 {
  36 }
  37
  38
  39 int
  40 arch_debug_blue_screen_try_getchar(void)
  41 {
  42         // TODO: Implement correctly!
  43         return arch_debug_blue_screen_getchar();
  44 }
  45
  46
  47 char
  48 arch_debug_blue_screen_getchar(void)
  49 {
  50         return arch_debug_serial_getchar();
  51 }
  52
  53
  54 int
  55 arch_debug_serial_try_getchar(void)
  56 {
  57         // TODO: Implement correctly!
  58         return arch_debug_serial_getchar();
  59 }
  60
  61
  62 char
  63 arch_debug_serial_getchar(void)
  64 {
  65         return gArchDebugUART->GetChar(false);
  66 }
  67
  68
  69 void
  70 arch_debug_serial_putchar(const char c)
  71 {
  72         gArchDebugUART->PutChar(c);
  73 }
  74
  75
  76 void
  77 arch_debug_serial_puts(const char *s)
  78 {
  79         while (*s != '\0') {
  80                 arch_debug_serial_putchar(*s);
  81                 s++;
  82         }
  83 }
  84
  85
  86 void
  87 arch_debug_serial_early_boot_message(const char *string)
  88 {
  89         // this function will only be called in fatal situations
  90         arch_debug_serial_puts(string);
  91 }
  92
  93
  94 status_t
  95 arch_debug_console_init(kernel_args *args)
  96 {
  97         // first try with hints from the FDT
  98         gArchDebugUART = debug_uart_from_fdt(args->platform_args.fdt);
  99
 100         // Do we can some kind of direct fallback here
 101         // (aka, guess arch_get_uart_pl011 or arch_get_uart_8250?)
 102         if (gArchDebugUART == NULL)
 103                 return B_ERROR;
 104
 105         gArchDebugUART->InitEarly();
 106
 107         return B_OK;
 108 }
 109
 110
 111 status_t
 112 arch_debug_console_init_settings(kernel_args *args)
 113 {
 114         return B_OK;
 115 }