kernel/fiasco/src/kern/kernel_uart-libuart.cpp

   1 IMPLEMENTATION [libuart]:
   2
   3 #include "kmem.h"
   4 #include "io_regblock.h"
   5
   6 //------------------------------------------------------------------------
   7 IMPLEMENTATION [libuart && serial && io]:
   8
   9 #include "io_regblock_port.h"
  10
  11 namespace {
  12
  13 union Regs
  14 {
  15   Static_object<L4::Io_register_block_port> io;
  16   Static_object<L4::Io_register_block_mmio> mem;
  17 };
  18
  19 static bool
  20 setup_uart_io_port(Regs *regs, Address base, int irq)
  21 {
  22   regs->io.construct(base);
  23   return Kernel_uart::uart()->startup(regs->io.get(), irq,
  24                                       Koptions::o()->uart.base_baud);
  25 }
  26
  27 }
  28
  29 //------------------------------------------------------------------------
  30 IMPLEMENTATION [libuart && serial && !io]:
  31
  32 namespace {
  33
  34 struct Regs
  35 {
  36   Static_object<L4::Io_register_block_mmio> mem;
  37 };
  38
  39 static bool
  40 setup_uart_io_port(Regs *, Address, int)
  41 {
  42   panic ("cannot use IO-Port based uart\n");
  43 }
  44
  45 }
  46
  47 //------------------------------------------------------------------------
  48 IMPLEMENTATION [libuart && serial]:
  49
  50 IMPLEMENT
  51 bool
  52 Kernel_uart::init_for_mode(Init_mode init_mode)
  53 {
  54   if (Koptions::o()->uart.access_type == Koptions::Uart_type_ioport)
  55     return init_mode == Init_before_mmu;
  56   else
  57     return init_mode == Init_after_mmu;
  58 }
  59
  60 IMPLEMENT
  61 bool Kernel_uart::startup(unsigned, int irq)
  62 {
  63   static Regs regs;
  64
  65   if (Koptions::o()->opt(Koptions::F_uart_base))
  66     {
  67       Address base = Koptions::o()->uart.base_address;
  68       switch (Koptions::o()->uart.access_type)
  69         {
  70         case Koptions::Uart_type_ioport:
  71           return setup_uart_io_port(&regs, base, irq);
  72
  73         case Koptions::Uart_type_mmio:
  74           regs.mem.construct(Kmem::mmio_remap(base),
  75                              Koptions::o()->uart.reg_shift);
  76           return uart()->startup(regs.mem.get(), irq,
  77                                  Koptions::o()->uart.base_baud);
  78         default:
  79           return false;
  80         }
  81     }
  82
  83   return false;
  84 }