[U-Boot] [RFC PATCH 3/3] spl: add support to booting with ATF

Kever Yang
2016-12-29T10:25:22Z

ATF(ARM Trust Firmware) is used by ARM arch64 SoCs, find more infomation
about ATF at:

SPL is consider as BL2 in ATF, it needs to load other part of ATF binary
like BL31, BL32, SCP-BL30, and BL33(U-Boot). And needs to prepare the
parameter for BL31 which including entry and image information for all
other images. Then the SPL handle PC to BL31 with the parameter, the
BL31 will do the rest of work and at last get into U-Boot(BL33).

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
---

common/spl/Kconfig | 14 +++
common/spl/Makefile | 1 +
common/spl/spl.c | 4 +
common/spl/spl_atf.c | 91 ++++++++++++++++
include/atf_common.h | 295 +++++++++++++++++++++++++++++++++++++++++++++++++++
include/spl.h | 1 +
6 files changed, 406 insertions(+)
create mode 100644 common/spl/spl_atf.c
create mode 100644 include/atf_common.h

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index cba51f5..1bb4360 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -577,6 +577,20 @@ config SPL_YMODEM_SUPPORT
means of transmitting U-Boot over a serial line for using in SPL,
with a checksum to ensure correctness.

+config SPL_ATF_SUPPORT
+ bool "Support ARM trust firmware"
+ depends on SPL
+ help
+ ATF(ARM Trust Firmware) is component for ARM arch64 which need to
+ load by SPL(consider as BL2 in ATF).
+ More detail at: https://github.com/ARM-software/arm-trusted-firmware
+
+config SPL_ATF_TEXT_BASE
+ depends on SPL_ATF_SUPPORT
+ hex "ATF TEXT BASE addr"
+ help
+ This is the base address in memory for ATF text and entry point.
+
config TPL_ENV_SUPPORT
bool "Support an environment"
depends on TPL
diff --git a/common/spl/Makefile b/common/spl/Makefile
index ed02635..620ae90 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -20,6 +20,7 @@ endif
obj-$(CONFIG_SPL_UBI) += spl_ubi.o
obj-$(CONFIG_SPL_NET_SUPPORT) += spl_net.o
obj-$(CONFIG_SPL_MMC_SUPPORT) += spl_mmc.o
+obj-$(CONFIG_SPL_ATF_SUPPORT) += spl_atf.o
obj-$(CONFIG_SPL_USB_SUPPORT) += spl_usb.o
obj-$(CONFIG_SPL_FAT_SUPPORT) += spl_fat.o
obj-$(CONFIG_SPL_EXT_SUPPORT) += spl_ext.o
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 1729034..7daf7bd 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -390,6 +390,10 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
gd->malloc_ptr / 1024);
#endif

+#ifdef CONFIG_SPL_ATF_SUPPORT
+ bl31_entry();
+#endif
+
debug("loaded - jumping to U-Boot...");
spl_board_prepare_for_boot();
jump_to_image_no_args(&spl_image);
diff --git a/common/spl/spl_atf.c b/common/spl/spl_atf.c
new file mode 100644
index 0000000..cf23b7a
--- /dev/null
+++ b/common/spl/spl_atf.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2016 Rockchip Electronic Co.,Ltd
+ * Written by Kever Yang <kever.yang@rock-chips.com>
+ *
+ * origin from arm-trust-firmware
+ * plat/arm/common/arm_bl2_setup.c
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <spl.h>
+#include <atf_common.h>
+
+static struct bl2_to_bl31_params_mem_t bl31_params_mem;
+static struct bl31_params_t *bl2_to_bl31_params;
+
+/*******************************************************************************
+ * This function assigns a pointer to the memory that the platform has kept
+ * aside to pass platform specific and trusted firmware related information
+ * to BL31. This memory is allocated by allocating memory to
+ * bl2_to_bl31_params_mem_t structure which is a superset of all the
+ * structure whose information is passed to BL31
+ * NOTE: This function should be called only once and should be done
+ * before generating params to BL31
+ ******************************************************************************/
+struct bl31_params_t *bl2_plat_get_bl31_params(void)
+{
+ struct entry_point_info_t *bl33_ep_info;
+
+ /*
+ * Initialise the memory for all the arguments that needs to
+ * be passed to BL31
+ */
+ memset(&bl31_params_mem, 0, sizeof(struct bl2_to_bl31_params_mem_t));
+
+ /* Assign memory for TF related information */
+ bl2_to_bl31_params = &bl31_params_mem.bl31_params;
+ SET_PARAM_HEAD(bl2_to_bl31_params, PARAM_BL31, VERSION_1, 0);
+
+ /* Fill BL31 related information */
+ SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info, PARAM_IMAGE_BINARY,
+ VERSION_1, 0);
+
+ /* Fill BL32 related information if it exists */
+#ifdef BL32_BASE
+ bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info;
+ SET_PARAM_HEAD(bl2_to_bl31_params->bl32_ep_info, PARAM_EP,
+ VERSION_1, 0);
+ bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info;
+ SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info, PARAM_IMAGE_BINARY,
+ VERSION_1, 0);
+#endif /* BL32_BASE */
+
+ /* Fill BL33 related information */
+ bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info;
+ bl33_ep_info = &bl31_params_mem.bl33_ep_info;
+ SET_PARAM_HEAD(bl33_ep_info, PARAM_EP, VERSION_1, EP_NON_SECURE);
+
+ /* BL33 expects to receive the primary CPU MPID (through x0) */
+ bl33_ep_info->args.arg0 = 0xffff & read_mpidr();
+ bl33_ep_info->pc = CONFIG_SYS_TEXT_BASE;
+ bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
+ DISABLE_ALL_EXECPTIONS);
+
+ bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info;
+ SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, PARAM_IMAGE_BINARY,
+ VERSION_1, 0);
+
+
+ return bl2_to_bl31_params;
+}
+
+void raw_write_daif(uint32_t daif)
+{
+ __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory");
+}
+
+void bl31_entry(void)
+{
+ struct bl31_params_t *bl31_params;
+ void (*entry)(struct bl31_params_t *params, void *plat_params) = NULL;
+
+ bl31_params = bl2_plat_get_bl31_params();
+ entry = (void *)CONFIG_SPL_ATF_TEXT_BASE;
+
+ raw_write_daif(SPSR_EXCEPTION_MASK);
+ dcache_disable();
+
+ entry(bl31_params, NULL);
+}
diff --git a/include/atf_common.h b/include/atf_common.h
new file mode 100644
index 0000000..8351302
--- /dev/null
+++ b/include/atf_common.h
@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __BL_COMMON_H__
+#define __BL_COMMON_H__
+
+#define SECURE 0x0
+#define NON_SECURE 0x1
+#define sec_state_is_valid(s) (((s) == SECURE) || ((s) == NON_SECURE))
+
+#define UP 1
+#define DOWN 0
+
+/*******************************************************************************
+ * Constants to identify the location of a memory region in a given memory
+ * layout.
+******************************************************************************/
+#define TOP 0x1
+#define BOTTOM !TOP
+
+/*******************************************************************************
+ * Constants that allow assembler code to access members of and the
+ * 'entry_point_info' structure at their correct offsets.
+ ******************************************************************************/
+#define ENTRY_POINT_INFO_PC_OFFSET 0x08
+#define ENTRY_POINT_INFO_ARGS_OFFSET 0x18
+
+/* The following are used to set/get image attributes. */
+#define PARAM_EP_SECURITY_MASK (0x1)
+
+#define GET_SECURITY_STATE(x) (x & PARAM_EP_SECURITY_MASK)
+#define SET_SECURITY_STATE(x, security) \
+ ((x) = ((x) & ~PARAM_EP_SECURITY_MASK) | (security))
+
+
+/*
+ * The following are used for image state attributes.
+ * Image can only be in one of the following state.
+ */
+#define IMAGE_STATE_RESET 0
+#define IMAGE_STATE_COPIED 1
+#define IMAGE_STATE_COPYING 2
+#define IMAGE_STATE_AUTHENTICATED 3
+#define IMAGE_STATE_EXECUTED 4
+#define IMAGE_STATE_INTERRUPTED 5
+
+#define EP_SECURE 0x0
+#define EP_NON_SECURE 0x1
+
+#define EP_EE_MASK 0x2
+#define EP_EE_LITTLE 0x0
+#define EP_EE_BIG 0x2
+#define EP_GET_EE(x) (x & EP_EE_MASK)
+#define EP_SET_EE(x, ee) ((x) = ((x) & ~EP_EE_MASK) | (ee))
+
+#define EP_ST_MASK 0x4
+#define EP_ST_DISABLE 0x0
+#define EP_ST_ENABLE 0x4
+#define EP_GET_ST(x) (x & EP_ST_MASK)
+#define EP_SET_ST(x, ee) ((x) = ((x) & ~EP_ST_MASK) | (ee))
+
+#define EP_EXE_MASK 0x8
+#define NON_EXECUTABLE 0x0
+#define EXECUTABLE 0x8
+#define EP_GET_EXE(x) (x & EP_EXE_MASK)
+#define EP_SET_EXE(x, ee) ((x) = ((x) & ~EP_EXE_MASK) | (ee))
+
+#define PARAM_EP 0x01
+#define PARAM_IMAGE_BINARY 0x02
+#define PARAM_BL31 0x03
+
+#define VERSION_1 0x01
+
+#define INVALID_IMAGE_ID (0xFFFFFFFF)
+
+#define SET_PARAM_HEAD(_p, _type, _ver, _attr) do { \
+ (_p)->h.type = (uint8_t)(_type); \
+ (_p)->h.version = (uint8_t)(_ver); \
+ (_p)->h.size = (uint16_t)sizeof(*_p); \
+ (_p)->h.attr = (uint32_t)(_attr) ; \
+ } while (0)
+
+/* Following is used for populating structure members statically. */
+#define SET_STATIC_PARAM_HEAD(_p, _type, _ver, _p_type, _attr) \
+ ._p.h.type = (uint8_t)(_type), \
+ ._p.h.version = (uint8_t)(_ver), \
+ ._p.h.size = (uint16_t)sizeof(_p_type), \
+ ._p.h.attr = (uint32_t)(_attr)
+
+#define MODE_RW_SHIFT 0x4
+#define MODE_RW_MASK 0x1
+#define MODE_RW_64 0x0
+#define MODE_RW_32 0x1
+
+#define MODE_EL_SHIFT 0x2
+#define MODE_EL_MASK 0x3
+#define MODE_EL3 0x3
+#define MODE_EL2 0x2
+#define MODE_EL1 0x1
+#define MODE_EL0 0x0
+
+#define MODE_SP_SHIFT 0x0
+#define MODE_SP_MASK 0x1
+#define MODE_SP_EL0 0x0
+#define MODE_SP_ELX 0x1
+
+#define SPSR_DAIF_SHIFT 6
+#define SPSR_DAIF_MASK 0x0f
+
+#define DAIF_FIQ_BIT (1<<0)
+#define DAIF_IRQ_BIT (1<<0)
+#define DAIF_ABT_BIT (1<<0)
+#define DAIF_DBG_BIT (1<<0)
+#define DISABLE_ALL_EXECPTIONS \
+ (DAIF_FIQ_BIT | DAIF_IRQ_BIT | DAIF_ABT_BIT | DAIF_DBG_BIT)
+
+#define SPSR_64(el, sp, daif) \
+ (MODE_RW_64 << MODE_RW_SHIFT | \
+ ((el) & MODE_EL_MASK) << MODE_EL_SHIFT | \
+ ((sp) & MODE_SP_MASK) << MODE_SP_SHIFT | \
+ ((daif) & SPSR_DAIF_MASK) << SPSR_DAIF_SHIFT)
+
+/*******************************************************************************
+ * Constants to indicate type of exception to the common exception handler.
+ ******************************************************************************/
+#define SYNC_EXCEPTION_SP_EL0 0x0
+#define IRQ_SP_EL0 0x1
+#define FIQ_SP_EL0 0x2
+#define SERROR_SP_EL0 0x3
+#define SYNC_EXCEPTION_SP_ELX 0x4
+#define IRQ_SP_ELX 0x5
+#define FIQ_SP_ELX 0x6
+#define SERROR_SP_ELX 0x7
+#define SYNC_EXCEPTION_AARCH64 0x8
+#define IRQ_AARCH64 0x9
+#define FIQ_AARCH64 0xa
+#define SERROR_AARCH64 0xb
+#define SYNC_EXCEPTION_AARCH32 0xc
+#define IRQ_AARCH32 0xd
+#define FIQ_AARCH32 0xe
+#define SERROR_AARCH32 0xf
+
+#define SPSR_USE_L 0
+#define SPSR_USE_H 1
+#define SPSR_L_H_MASK 1
+#define SPSR_M_SHIFT 4
+#define SPSR_ERET_32 (1 << SPSR_M_SHIFT)
+#define SPSR_ERET_64 (0 << SPSR_M_SHIFT)
+#define SPSR_FIQ (1 << 6)
+#define SPSR_IRQ (1 << 7)
+#define SPSR_SERROR (1 << 8)
+#define SPSR_DEBUG (1 << 9)
+#define SPSR_EXCEPTION_MASK (SPSR_FIQ | SPSR_IRQ | SPSR_SERROR | SPSR_DEBUG)
+
+#ifndef __ASSEMBLY__
+
+/*******************************************************************************
+ * Structure used for telling the next BL how much of a particular type of
+ * memory is available for its use and how much is already used.
+ ******************************************************************************/
+struct aapcs64_params_t {
+ unsigned long arg0;
+ unsigned long arg1;
+ unsigned long arg2;
+ unsigned long arg3;
+ unsigned long arg4;
+ unsigned long arg5;
+ unsigned long arg6;
+ unsigned long arg7;
+};
+
+/***************************************************************************
+ * This structure provides version information and the size of the
+ * structure, attributes for the structure it represents
+ ***************************************************************************/
+struct param_header_t {
+ uint8_t type; /* type of the structure */
+ uint8_t version; /* version of this structure */
+ uint16_t size; /* size of this structure in bytes */
+ uint32_t attr; /* attributes: unused bits SBZ */
+};
+
+/*****************************************************************************
+ * This structure represents the superset of information needed while
+ * switching exception levels. The only two mechanisms to do so are
+ * ERET & SMC. Security state is indicated using bit zero of header
+ * attribute
+ * NOTE: BL1 expects entrypoint followed by spsr@an offset from the start
+ * of this structure defined by the macro `ENTRY_POINT_INFO_PC_OFFSET` while
+ * processing SMC to jump to BL31.
+ *****************************************************************************/
+struct entry_point_info_t {
+ struct param_header_t h;
+ uintptr_t pc;
+ uint32_t spsr;
+ struct aapcs64_params_t args;
+};
+
+/*****************************************************************************
+ * Image info binary provides information from the image loader that
+ * can be used by the firmware to manage available trusted RAM.
+ * More advanced firmware image formats can provide additional
+ * information that enables optimization or greater flexibility in the
+ * common firmware code
+ *****************************************************************************/
+struct atf_image_info_t {
+ struct param_header_t h;
+ uintptr_t image_base; /* physical address of base of image */
+ uint32_t image_size; /* bytes read from image file */
+};
+
+/*****************************************************************************
+ * The image descriptor struct definition.
+ *****************************************************************************/
+struct image_desc_t {
+ /* Contains unique image id for the image. */
+ unsigned int image_id;
+ /*
+ * This member contains Image state information.
+ * Refer IMAGE_STATE_XXX defined above.
+ */
+ unsigned int state;
+ uint32_t copied_size; /* image size copied in blocks */
+ struct atf_image_info_t atf_image_info;
+ struct entry_point_info_t ep_info;
+};
+
+/*******************************************************************************
+ * This structure represents the superset of information that can be passed to
+ * BL31 e.g. while passing control to it from BL2. The BL32 parameters will be
+ * populated only if BL2 detects its presence. A pointer to a structure of this
+ * type should be passed in X0 to BL31's cold boot entrypoint.
+ *
+ * Use of this structure and the X0 parameter is not mandatory: the BL31
+ * platform code can use other mechanisms to provide the necessary information
+ * about BL32 and BL33 to the common and SPD code.
+ *
+ * BL31 image information is mandatory if this structure is used. If either of
+ * the optional BL32 and BL33 image information is not provided, this is
+ * indicated by the respective image_info pointers being zero.
+ ******************************************************************************/
+struct bl31_params_t {
+ struct param_header_t h;
+ struct atf_image_info_t *bl31_image_info;
+ struct entry_point_info_t *bl32_ep_info;
+ struct atf_image_info_t *bl32_image_info;
+ struct entry_point_info_t *bl33_ep_info;
+ struct atf_image_info_t *bl33_image_info;
+};
+
+/*******************************************************************************
+ * This structure represents the superset of information that is passed to
+ * BL31, e.g. while passing control to it from BL2, bl31_params
+ * and other platform specific params
+ ******************************************************************************/
+struct bl2_to_bl31_params_mem_t {
+ struct bl31_params_t bl31_params;
+ struct atf_image_info_t bl31_image_info;
+ struct atf_image_info_t bl32_image_info;
+ struct atf_image_info_t bl33_image_info;
+ struct entry_point_info_t bl33_ep_info;
+ struct entry_point_info_t bl32_ep_info;
+ struct entry_point_info_t bl31_ep_info;
+};
+
+#endif /*__ASSEMBLY__*/
+
+#endif /* __BL_COMMON_H__ */
diff --git a/include/spl.h b/include/spl.h
index 918c464..ab5eaca 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -251,4 +251,5 @@ int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
int spl_mmc_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev);

+void bl31_entry(void);
#endif
--
1.9.1