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spl: atf: add support for LOAD_IMAGE_V2

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Newer platforms use the LOAD_IMAGE_V2 parameter passing method. Add
support for it.

Signed-off-by: Michael Walle <michael@walle.cc>
This commit is contained in:
Michael Walle 2020-11-18 17:45:58 +01:00 committed by Tom Rini
parent 553825c109
commit 7b866825cd
4 changed files with 169 additions and 4 deletions
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9
common/spl/Kconfig
View File

@ -1276,6 +1276,15 @@ config SPL_ATF
is loaded by SPL (which is considered as BL2 in ATF terminology).
More detail at: https://github.com/ARM-software/arm-trusted-firmware
config SPL_ATF_LOAD_IMAGE_V2
bool "Use the new LOAD_IMAGE_V2 parameter passing"
depends on SPL_ATF
help
Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
If you want to load a bl31 image from the SPL and need the new
method, say Y.
config SPL_ATF_NO_PLATFORM_PARAM
bool "Pass no platform parameter"
depends on SPL_ATF

99
common/spl/spl_atf.c
View File

@ -29,6 +29,19 @@ struct bl2_to_bl31_params_mem {
struct entry_point_info bl31_ep_info;
};
struct bl2_to_bl31_params_mem_v2 {
struct bl_params bl_params;
struct bl_params_node bl31_params_node;
struct bl_params_node bl32_params_node;
struct bl_params_node bl33_params_node;
struct atf_image_info bl31_image_info;
struct atf_image_info bl32_image_info;
struct atf_image_info bl33_image_info;
struct entry_point_info bl33_ep_info;
struct entry_point_info bl32_ep_info;
struct entry_point_info bl31_ep_info;
};
struct bl31_params *bl2_plat_get_bl31_params_default(uintptr_t bl32_entry,
uintptr_t bl33_entry,
uintptr_t fdt_addr)
@ -96,6 +109,79 @@ __weak struct bl31_params *bl2_plat_get_bl31_params(uintptr_t bl32_entry,
fdt_addr);
}
struct bl_params *bl2_plat_get_bl31_params_v2_default(uintptr_t bl32_entry,
uintptr_t bl33_entry,
uintptr_t fdt_addr)
{
static struct bl2_to_bl31_params_mem_v2 bl31_params_mem;
struct bl_params *bl_params;
struct bl_params_node *bl_params_node;
/*
* Initialise the memory for all the arguments that needs to
* be passed to BL31
*/
memset(&bl31_params_mem, 0, sizeof(bl31_params_mem));
/* Assign memory for TF related information */
bl_params = &bl31_params_mem.bl_params;
SET_PARAM_HEAD(bl_params, ATF_PARAM_BL_PARAMS, ATF_VERSION_2, 0);
bl_params->head = &bl31_params_mem.bl31_params_node;
/* Fill BL31 related information */
bl_params_node = &bl31_params_mem.bl31_params_node;
bl_params_node->image_id = ATF_BL31_IMAGE_ID;
bl_params_node->image_info = &bl31_params_mem.bl31_image_info;
bl_params_node->ep_info = &bl31_params_mem.bl31_ep_info;
bl_params_node->next_params_info = &bl31_params_mem.bl32_params_node;
SET_PARAM_HEAD(bl_params_node->image_info, ATF_PARAM_IMAGE_BINARY,
ATF_VERSION_2, 0);
/* Fill BL32 related information */
bl_params_node = &bl31_params_mem.bl32_params_node;
bl_params_node->image_id = ATF_BL32_IMAGE_ID;
bl_params_node->image_info = &bl31_params_mem.bl32_image_info;
bl_params_node->ep_info = &bl31_params_mem.bl32_ep_info;
bl_params_node->next_params_info = &bl31_params_mem.bl33_params_node;
SET_PARAM_HEAD(bl_params_node->ep_info, ATF_PARAM_EP,
ATF_VERSION_2, ATF_EP_SECURE);
/* secure payload is optional, so set pc to 0 if absent */
bl_params_node->ep_info->args.arg3 = fdt_addr;
bl_params_node->ep_info->pc = bl32_entry ? bl32_entry : 0;
bl_params_node->ep_info->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX,
DISABLE_ALL_EXECPTIONS);
SET_PARAM_HEAD(bl_params_node->image_info, ATF_PARAM_IMAGE_BINARY,
ATF_VERSION_2, 0);
/* Fill BL33 related information */
bl_params_node = &bl31_params_mem.bl33_params_node;
bl_params_node->image_id = ATF_BL33_IMAGE_ID;
bl_params_node->image_info = &bl31_params_mem.bl33_image_info;
bl_params_node->ep_info = &bl31_params_mem.bl33_ep_info;
bl_params_node->next_params_info = NULL;
SET_PARAM_HEAD(bl_params_node->ep_info, ATF_PARAM_EP,
ATF_VERSION_2, ATF_EP_NON_SECURE);
/* BL33 expects to receive the primary CPU MPID (through x0) */
bl_params_node->ep_info->args.arg0 = 0xffff & read_mpidr();
bl_params_node->ep_info->pc = bl33_entry;
bl_params_node->ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
DISABLE_ALL_EXECPTIONS);
SET_PARAM_HEAD(bl_params_node->image_info, ATF_PARAM_IMAGE_BINARY,
ATF_VERSION_2, 0);
return bl_params;
}
__weak struct bl_params *bl2_plat_get_bl31_params_v2(uintptr_t bl32_entry,
uintptr_t bl33_entry,
uintptr_t fdt_addr)
{
return bl2_plat_get_bl31_params_v2_default(bl32_entry, bl33_entry,
fdt_addr);
}
static inline void raw_write_daif(unsigned int daif)
{
__asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory");
@ -106,16 +192,21 @@ typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params);
static void bl31_entry(uintptr_t bl31_entry, uintptr_t bl32_entry,
uintptr_t bl33_entry, uintptr_t fdt_addr)
{
struct bl31_params *bl31_params;
atf_entry_t atf_entry = (atf_entry_t)bl31_entry;
void *bl31_params;
bl31_params = bl2_plat_get_bl31_params(bl32_entry, bl33_entry,
fdt_addr);
if (CONFIG_IS_ENABLED(ATF_LOAD_IMAGE_V2))
bl31_params = bl2_plat_get_bl31_params_v2(bl32_entry,
bl33_entry,
fdt_addr);
else
bl31_params = bl2_plat_get_bl31_params(bl32_entry, bl33_entry,
fdt_addr);
raw_write_daif(SPSR_EXCEPTION_MASK);
dcache_disable();
atf_entry((void *)bl31_params, (void *)fdt_addr);
atf_entry(bl31_params, (void *)fdt_addr);
}
static int spl_fit_images_find(void *blob, int os)

30
include/atf_common.h
View File

@ -14,8 +14,14 @@
#define ATF_PARAM_EP 0x01
#define ATF_PARAM_IMAGE_BINARY 0x02
#define ATF_PARAM_BL31 0x03
#define ATF_PARAM_BL_PARAMS 0x05
#define ATF_VERSION_1 0x01
#define ATF_VERSION_2 0x02
#define ATF_BL31_IMAGE_ID 0x03
#define ATF_BL32_IMAGE_ID 0x04
#define ATF_BL33_IMAGE_ID 0x05
#define ATF_EP_SECURE 0x0
#define ATF_EP_NON_SECURE 0x1
@ -121,6 +127,9 @@ struct atf_image_info {
struct param_header h;
uintptr_t image_base; /* physical address of base of image */
uint32_t image_size; /* bytes read from image file */
#if CONFIG_IS_ENABLED(ATF_LOAD_IMAGE_V2)
uint32_t image_max_size;
#endif
};
/*****************************************************************************
@ -162,6 +171,27 @@ struct bl31_params {
struct atf_image_info *bl33_image_info;
};
/* BL image node in the BL image execution sequence */
struct bl_params_node {
unsigned int image_id;
struct atf_image_info *image_info;
struct entry_point_info *ep_info;
struct bl_params_node *next_params_info;
};
/*
* BL image head node in the BL image execution sequence
* It is also used to pass information to next BL image.
*/
struct bl_params {
struct param_header h;
struct bl_params_node *head;
};
#define for_each_bl_params_node(bl_params, node) \
for ((node) = (bl_params)->head; \
(node); \
(node) = (node)->next_params_info)
#endif /*__ASSEMBLY__ */

35
include/spl.h
View File

@ -564,6 +564,41 @@ struct bl31_params *bl2_plat_get_bl31_params(uintptr_t bl32_entry,
struct bl31_params *bl2_plat_get_bl31_params_default(uintptr_t bl32_entry,
uintptr_t bl33_entry,
uintptr_t fdt_addr);
/**
* bl2_plat_get_bl31_params_v2() - return params for bl31
* @bl32_entry: address of BL32 executable (secure)
* @bl33_entry: address of BL33 executable (non secure)
* @fdt_addr: address of Flat Device Tree
*
* This function does the same as bl2_plat_get_bl31_params() except that is is
* used for the new LOAD_IMAGE_V2 option, which uses a slightly different
* method to pass the parameters.
*
* Return: bl31 params structure pointer
*/
struct bl_params *bl2_plat_get_bl31_params_v2(uintptr_t bl32_entry,
uintptr_t bl33_entry,
uintptr_t fdt_addr);
/**
* bl2_plat_get_bl31_params_v2_default() - prepare params for bl31.
* @bl32_entry: address of BL32 executable (secure)
* @bl33_entry: address of BL33 executable (non secure)
* @fdt_addr: address of Flat Device Tree
*
* This is the default implementation of bl2_plat_get_bl31_params_v2(). It
* prepares the linked list of the bl31 params, populates the image types and
* set the entry points for bl32 and bl33 (if available).
*
* NOTE: The memory is statically allocated, thus this function should be
* called only once. All subsequent calls will overwrite any changes.
*
* Return: bl31 params structure pointer
*/
struct bl_params *bl2_plat_get_bl31_params_v2_default(uintptr_t bl32_entry,
uintptr_t bl33_entry,
uintptr_t fdt_addr);
/**
* spl_optee_entry - entry function for optee
*