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Support nested boot.

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For example: Ventoy-->rEFInd.iso-->Ventoy-->Windows.iso
This commit is contained in:
longpanda
2021-07-24 18:47:39 +08:00
parent 094ba61848
commit 7b78fe555e
3 changed files with 101 additions and 12 deletions
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55
EDK2/edk2_mod/edk2-edk2-stable201911/MdeModulePkg/Application/Ventoy/Ventoy.c
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@@ -363,10 +363,22 @@ EFI_HANDLE EFIAPI ventoy_get_parent_handle(IN EFI_DEVICE_PATH_PROTOCOL *pDevPath
return Handle;
}
STATIC ventoy_ram_disk g_backup_ramdisk_param;
STATIC ventoy_os_param g_backup_os_param_var;
EFI_STATUS EFIAPI ventoy_save_ramdisk_param(VOID)
{
UINTN DataSize;
EFI_STATUS Status = EFI_SUCCESS;
EFI_GUID VarGuid = VENTOY_GUID;
DataSize = sizeof(g_backup_ramdisk_param);
Status = gRT->GetVariable(L"VentoyRamDisk", &VarGuid, NULL, &DataSize, &g_backup_ramdisk_param);
if (!EFI_ERROR(Status))
{
debug("find previous ramdisk variable <%llu>", g_backup_ramdisk_param.DiskSize);
}
Status = gRT->SetVariable(L"VentoyRamDisk", &VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
@@ -380,21 +392,38 @@ EFI_STATUS EFIAPI ventoy_delete_ramdisk_param(VOID)
{
EFI_STATUS Status = EFI_SUCCESS;
EFI_GUID VarGuid = VENTOY_GUID;
Status = gRT->SetVariable(L"VentoyRamDisk", &VarGuid,
if (g_backup_ramdisk_param.DiskSize > 0 && g_backup_ramdisk_param.PhyAddr > 0)
{
Status = gRT->SetVariable(L"VentoyRamDisk", &VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(g_backup_ramdisk_param), &g_backup_ramdisk_param);
debug("resotre ramdisk variable %r", Status);
}
else
{
Status = gRT->SetVariable(L"VentoyRamDisk", &VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0, NULL);
debug("delete efi variable %r", Status);
debug("delete ramdisk variable %r", Status);
}
return Status;
}
EFI_STATUS EFIAPI ventoy_save_variable(VOID)
{
UINTN DataSize;
EFI_STATUS Status = EFI_SUCCESS;
EFI_GUID VarGuid = VENTOY_GUID;
DataSize = sizeof(g_backup_os_param_var);
Status = gRT->GetVariable(L"VentoyOsParam", &VarGuid, NULL, &DataSize, &g_backup_os_param_var);
if (!EFI_ERROR(Status))
{
debug("find previous efi variable <%a>", g_backup_os_param_var.vtoy_img_path);
}
Status = gRT->SetVariable(L"VentoyOsParam", &VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(g_chain->os_param), &(g_chain->os_param));
@@ -407,11 +436,21 @@ EFI_STATUS EFIAPI ventoy_delete_variable(VOID)
{
EFI_STATUS Status = EFI_SUCCESS;
EFI_GUID VarGuid = VENTOY_GUID;
Status = gRT->SetVariable(L"VentoyOsParam", &VarGuid,
if (0 == CompareMem(&(g_backup_os_param_var.guid), &VarGuid, sizeof(EFI_GUID)))
{
Status = gRT->SetVariable(L"VentoyOsParam", &VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(g_backup_os_param_var), &(g_backup_os_param_var));
debug("restore efi variable %r", Status);
}
else
{
Status = gRT->SetVariable(L"VentoyOsParam", &VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0, NULL);
debug("delete efi variable %r", Status);
debug("delete efi variable %r", Status);
}
return Status;
}