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efi_loader: add handle for UART

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When loading an EFI binary via the UART we assign a UART device path to it.
But we lack a handle with that device path.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2022-02-04 20:47:09 +01:00
parent 915623c0d3
commit 3c95b323c7
2 changed files with 23 additions and 24 deletions
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1
include/efi_loader.h
View File

@ -769,6 +769,7 @@ const struct efi_device_path *efi_dp_last_node(
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
struct efi_device_path **device_path,
struct efi_device_path **file_path);
struct efi_device_path *efi_dp_from_uart(void);
efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
const char *path,
struct efi_device_path **device,

46
lib/efi_loader/efi_console.c
View File

@ -25,6 +25,8 @@ struct cout_mode {
int present;
};
__maybe_unused static struct efi_object uart_obj;
static struct cout_mode efi_cout_modes[] = {
/* EFI Mode 0 is 80x25 and always present */
{
@ -1258,37 +1260,33 @@ static void EFIAPI efi_key_notify(struct efi_event *event, void *context)
efi_status_t efi_console_register(void)
{
efi_status_t r;
efi_handle_t console_output_handle;
efi_handle_t console_input_handle;
struct efi_device_path *dp;
/* Set up mode information */
query_console_size();
/* Create handles */
r = efi_create_handle(&console_output_handle);
if (r != EFI_SUCCESS)
goto out_of_memory;
/* Install protocols on root node */
r = EFI_CALL(efi_install_multiple_protocol_interfaces
(&efi_root,
&efi_guid_text_output_protocol, &efi_con_out,
&efi_guid_text_input_protocol, &efi_con_in,
&efi_guid_text_input_ex_protocol, &efi_con_in_ex,
NULL));
r = efi_add_protocol(console_output_handle,
&efi_guid_text_output_protocol, &efi_con_out);
if (r != EFI_SUCCESS)
goto out_of_memory;
systab.con_out_handle = console_output_handle;
systab.stderr_handle = console_output_handle;
/* Create console node and install device path protocols */
if (CONFIG_IS_ENABLED(DM_SERIAL)) {
dp = efi_dp_from_uart();
if (!dp)
goto out_of_memory;
r = efi_create_handle(&console_input_handle);
if (r != EFI_SUCCESS)
goto out_of_memory;
/* Hook UART up to the device list */
efi_add_handle(&uart_obj);
r = efi_add_protocol(console_input_handle,
&efi_guid_text_input_protocol, &efi_con_in);
if (r != EFI_SUCCESS)
goto out_of_memory;
systab.con_in_handle = console_input_handle;
r = efi_add_protocol(console_input_handle,
&efi_guid_text_input_ex_protocol, &efi_con_in_ex);
if (r != EFI_SUCCESS)
goto out_of_memory;
/* Install device path */
r = efi_add_protocol(&uart_obj, &efi_guid_device_path, dp);
if (r != EFI_SUCCESS)
goto out_of_memory;
}
/* Create console events */
r = efi_create_event(EVT_NOTIFY_WAIT, TPL_CALLBACK, efi_key_notify,