This patch adds a new type IH_OS_TEE. This new OS type will be used for chain-loading to Linux via a TEE.
With this patch in-place you can generate a bootable OPTEE image like this:
mkimage -A arm -T kernel -O tee -C none -d tee.bin uTee.optee
where "tee.bin" is the input binary prefixed with an OPTEE header and uTee.optee is the output prefixed with a u-boot wrapper header.
This image type "-T kernel -O tee" is differentiated from the existing IH_TYPE_TEE "-T tee" in that the IH_TYPE is installed by u-boot (flow control returns to u-boot) whereas for the new IH_OS_TEE control passes to the OPTEE firmware and the firmware chainloads onto Linux.
Andrew Davis gave the following ASCII diagram:
IH_OS_TEE: (mkimage -T kernel -O tee) Non-Secure Secure
BootROM | ------------- | v SPL | v U-Boot ------> <----- OP-TEE | V Linux
IH_TYPE_TEE: (mkimage -T tee) Non-Secure Secure
BootROM | ------------- | v SPL -------> <----- OP-TEE | v U-Boot | V Linux
Signed-off-by: Bryan O'Donoghue bryan.odonoghue@linaro.org Suggested-by: Andrew F. Davis afd@ti.com Cc: Harinarayan Bhatta harinarayan@ti.com Cc: Andrew F. Davis afd@ti.com Cc: Tom Rini trini@konsulko.com Cc: Kever Yang kever.yang@rock-chips.com Cc: Philipp Tomsich philipp.tomsich@theobroma-systems.com Cc: Peng Fan peng.fan@nxp.com Link: http://mrvan.github.io/optee-imx6ul --- common/image.c | 1 + include/image.h | 1 + tools/default_image.c | 15 +++++++++++++-- 3 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/common/image.c b/common/image.c index 14be3ca..61e3d25 100644 --- a/common/image.c +++ b/common/image.c @@ -100,6 +100,7 @@ static const table_entry_t uimage_os[] = { { IH_OS_OSE, "ose", "Enea OSE", }, { IH_OS_PLAN9, "plan9", "Plan 9", }, { IH_OS_RTEMS, "rtems", "RTEMS", }, + { IH_OS_TEE, "tee", "Trusted Execution Environment" }, { IH_OS_U_BOOT, "u-boot", "U-Boot", }, { IH_OS_VXWORKS, "vxworks", "VxWorks", }, #if defined(CONFIG_CMD_ELF) || defined(USE_HOSTCC) diff --git a/include/image.h b/include/image.h index dbdaecb..a0a530d 100644 --- a/include/image.h +++ b/include/image.h @@ -153,6 +153,7 @@ enum { IH_OS_PLAN9, /* Plan 9 */ IH_OS_OPENRTOS, /* OpenRTOS */ IH_OS_ARM_TRUSTED_FIRMWARE, /* ARM Trusted Firmware */ + IH_OS_TEE, /* Trusted Execution Environment */
IH_OS_COUNT, }; diff --git a/tools/default_image.c b/tools/default_image.c index 4e5568e..c67f66b 100644 --- a/tools/default_image.c +++ b/tools/default_image.c @@ -18,6 +18,7 @@ #include "mkimage.h"
#include <image.h> +#include <tee/optee.h> #include <u-boot/crc.h>
static image_header_t header; @@ -90,6 +91,8 @@ static void image_set_header(void *ptr, struct stat *sbuf, int ifd, uint32_t checksum; time_t time; uint32_t imagesize; + uint32_t ep; + uint32_t addr;
image_header_t * hdr = (image_header_t *)ptr;
@@ -99,18 +102,26 @@ static void image_set_header(void *ptr, struct stat *sbuf, int ifd, sbuf->st_size - sizeof(image_header_t));
time = imagetool_get_source_date(params, sbuf->st_mtime); + ep = params->ep; + addr = params->addr; + if (params->type == IH_TYPE_FIRMWARE_IVT) /* Add size of CSF minus IVT */ imagesize = sbuf->st_size - sizeof(image_header_t) + 0x1FE0; else imagesize = sbuf->st_size - sizeof(image_header_t);
+ if (params->os == IH_OS_TEE) { + addr = optee_image_get_load_addr(hdr); + ep = optee_image_get_entry_point(hdr); + } + /* Build new header */ image_set_magic(hdr, IH_MAGIC); image_set_time(hdr, time); image_set_size(hdr, imagesize); - image_set_load(hdr, params->addr); - image_set_ep(hdr, params->ep); + image_set_load(hdr, addr); + image_set_ep(hdr, ep); image_set_dcrc(hdr, checksum); image_set_os(hdr, params->os); image_set_arch(hdr, params->arch);