[PATCH 5/8] spl: atf: add support for LOAD_IMAGE_V2
Michal Simek
michal.simek at xilinx.com
Wed Nov 18 15:26:13 CET 2020
On 16. 11. 20 22:47, Michael Walle wrote:
> Newer platforms use the LOAD_IMAGE_V2 parameter passing method. Add
> support for it.
>
> Signed-off-by: Michael Walle <michael at walle.cc>
> ---
> common/spl/Kconfig | 9 ++++
> common/spl/spl_atf.c | 99 ++++++++++++++++++++++++++++++++++++++++++--
> include/atf_common.h | 30 ++++++++++++++
> include/spl.h | 35 ++++++++++++++++
> 4 files changed, 169 insertions(+), 4 deletions(-)
>
> diff --git a/common/spl/Kconfig b/common/spl/Kconfig
> index d8086bd9e8..6d980be0b7 100644
> --- a/common/spl/Kconfig
> +++ b/common/spl/Kconfig
> @@ -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
> diff --git a/common/spl/spl_atf.c b/common/spl/spl_atf.c
> index 51b45d5dc6..e1b68dd561 100644
> --- a/common/spl/spl_atf.c
> +++ b/common/spl/spl_atf.c
> @@ -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)
> diff --git a/include/atf_common.h b/include/atf_common.h
> index e173a10ca9..d69892fac6 100644
> --- a/include/atf_common.h
> +++ b/include/atf_common.h
> @@ -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__ */
>
> diff --git a/include/spl.h b/include/spl.h
> index dccf515511..5b389df09a 100644
> --- a/include/spl.h
> +++ b/include/spl.h
> @@ -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
> *
>
also kernel-doc issues.
include/spl.h:569: info: Scanning doc for bl2_plat_get_bl31_params_v2
include/spl.h:582: warning: Function parameter or member 'bl32_entry'
not described in 'bl2_plat_get_bl31_params_v2'
include/spl.h:582: warning: Function parameter or member 'bl33_entry'
not described in 'bl2_plat_get_bl31_params_v2'
include/spl.h:582: warning: Function parameter or member 'fdt_addr' not
described in 'bl2_plat_get_bl31_params_v2'
include/spl.h:582: warning: No description found for return value of
'bl2_plat_get_bl31_params_v2'
include/spl.h:585: info: Scanning doc for
bl2_plat_get_bl31_params_v2_default
include/spl.h:594: warning: contents before sections
include/spl.h:601: warning: Function parameter or member 'bl32_entry'
not described in 'bl2_plat_get_bl31_params_v2_default'
include/spl.h:601: warning: Function parameter or member 'bl33_entry'
not described in 'bl2_plat_get_bl31_params_v2_default'
include/spl.h:601: warning: Function parameter or member 'fdt_addr' not
described in 'bl2_plat_get_bl31_params_v2_default'
include/spl.h:601: warning: No description found for return value of
'bl2_plat_get_bl31_params_v2_default'
./scripts/kernel-doc -v -man include/spl.h > /dev/null
M
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