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efi_loader: pass address to efi_install_fdt()

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As part of moving the parsing of command line arguments to do_bootefi()
call efi_install_fdt() with the address of the device tree instead of a
string.

If the address is EFI_FDT_USE_INTERNAL (= 0), the internal device tree
is used.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-11-28 06:46:09 +01:00
parent 570147275c
commit 7a597259d2
2 changed files with 21 additions and 14 deletions
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32
cmd/bootefi.c
View File

@ -196,40 +196,39 @@ static void *get_config_table(const efi_guid_t *guid)
#endif /* !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE) */
/**
* efi_install_fdt() - install fdt passed by a command argument
* efi_install_fdt() - install device tree
*
* If fdt_opt is available, the device tree located at that memory address will
* If fdt_addr is available, the device tree located at that memory address will
* will be installed as configuration table, otherwise the device tree located
* at the address indicated by environment variable fdtcontroladdr will be used.
*
* On architectures (x86) using ACPI tables device trees shall not be installed
* as configuration table.
* On architectures using ACPI tables device trees shall not be installed as
* configuration table.
*
* @fdt_opt: pointer to argument
* @fdt_addr: address of device tree or EFI_FDT_USE_INTERNAL to use the
* internal device tree as indicated by environment variable
* fdtcontroladdr
* Return: status code
*/
static efi_status_t efi_install_fdt(const char *fdt_opt)
static efi_status_t efi_install_fdt(uintptr_t fdt_addr)
{
/*
* The EBBR spec requires that we have either an FDT or an ACPI table
* but not both.
*/
#if CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE)
if (fdt_opt) {
if (fdt_addr) {
printf("ERROR: can't have ACPI table and device tree.\n");
return EFI_LOAD_ERROR;
}
#else
unsigned long fdt_addr;
void *fdt;
bootm_headers_t img = { 0 };
efi_status_t ret;
if (fdt_opt) {
fdt_addr = simple_strtoul(fdt_opt, NULL, 16);
if (!fdt_addr)
return EFI_INVALID_PARAMETER;
} else {
if (fdt_addr == EFI_FDT_USE_INTERNAL) {
const char *fdt_opt;
/* Look for device tree that is already installed */
if (get_config_table(&efi_guid_fdt))
return EFI_SUCCESS;
@ -556,6 +555,7 @@ static int do_efi_selftest(void)
static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
efi_status_t ret;
uintptr_t fdt_addr;
if (argc < 2)
return CMD_RET_USAGE;
@ -568,7 +568,11 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return CMD_RET_FAILURE;
}
ret = efi_install_fdt(argc > 2 ? argv[2] : NULL);
if (argc > 2)
fdt_addr = simple_strtoul(argv[2], NULL, 16);
else
fdt_addr = EFI_FDT_USE_INTERNAL;
ret = efi_install_fdt(fdt_addr);
if (ret == EFI_INVALID_PARAMETER)
return CMD_RET_USAGE;
else if (ret != EFI_SUCCESS)

3
include/efi_loader.h
View File

@ -34,6 +34,9 @@ static inline int guidcmp(const void *g1, const void *g2)
EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
/* Use internal device tree when starting UEFI application */
#define EFI_FDT_USE_INTERNAL 0UL
/* Root node */
extern efi_handle_t efi_root;