bsps/amd64: add a new EFI-based variant of AMD64 BSP

The new amd64efi BSP supports:
- multiboot2 boot format. Runs well with GRUB.
- console based on either EFI simple text output or GOP-based framebuffer
- clock based on EFI event/timer API
- early console using either hard-wired PC-AT serial or just memory buffer
- with EFI support disabled the BSP is more or less equivalent to amd64 BSP
  with multiboot2 support

1 files changed, 9 insertions, 2 deletions

diff --git a/bsps/x86_64/amd64/console/console.c b/bsps/x86_64/amd64/console/console.c
index 5408c57fe7..cc650fcb65 100644
--- a/bsps/x86_64/amd64/console/console.c
+++ b/bsps/x86_64/amd64/console/console.c
@@ -30,6 +30,9 @@
 #include <bsp/console-termios.h>
 #include <rtems/score/cpuimpl.h>
 
+void
+uart0_output_char(char);
+
 static uint8_t amd64_uart_get_register(uintptr_t addr, uint8_t i)
 {
   return inport_byte(addr + i);
@@ -61,12 +64,16 @@ const console_device console_device_table[] = {
 };
 const size_t console_device_count = RTEMS_ARRAY_SIZE(console_device_table);
 
-static void output_char(char c)
+void uart0_output_char(char c)
 {
   rtems_termios_device_context *ctx = console_device_table[0].context;
 
   ns16550_polled_putchar(ctx, c);
 }
 
-BSP_output_char_function_type BSP_output_char   = output_char;
+#ifndef BSP_USE_EFI_BOOT_SERVICES
+
+BSP_output_char_function_type BSP_output_char   = uart0_output_char;
 BSP_polling_getchar_function_type BSP_poll_char = NULL;
+
+#endif