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authorSascha Hauer <s.hauer@pengutronix.de>2021-06-21 11:27:58 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2021-06-24 08:55:41 +0200
commitbaf57b8e8df1b7303f5bd0aaaa47a3eed4284439 (patch)
tree2b718e55ce124cacd547029ecb90e1b82a2ceac6 /arch/arm/include
parente024dbb75174330bef2a4ae62faace649da80abd (diff)
downloadbarebox-baf57b8e8df1b7303f5bd0aaaa47a3eed4284439.tar.gz
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ARM: Add atf common support
ARM trusted firmware has some common data structures passed to bl31. This patch imports the code supporting this taken from U-Boot. The defines and data structures are taken directly from U-Boot, the support code is heavily modified for the sake of readability. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Link: https://lore.barebox.org/20210615141641.31577-9-s.hauer@pengutronix.de Link: https://lore.barebox.org/20210621092802.27275-9-s.hauer@pengutronix.de Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/atf_common.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/arch/arm/include/asm/atf_common.h b/arch/arm/include/asm/atf_common.h
new file mode 100644
index 0000000000..56e2d3ffaa
--- /dev/null
+++ b/arch/arm/include/asm/atf_common.h
@@ -0,0 +1,163 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * This is from the ARM TF Project,
+ * Repository: https://github.com/ARM-software/arm-trusted-firmware.git
+ * File: include/common/bl_common.h
+ * Portions copyright (c) 2013-2016, ARM Limited and Contributors. All rights
+ * reserved.
+ * Copyright (C) 2016-2017 Rockchip Electronic Co.,Ltd
+ */
+
+#ifndef __BL_COMMON_H__
+#define __BL_COMMON_H__
+
+#define ATF_PARAM_EP 0x01
+#define ATF_PARAM_IMAGE_BINARY 0x02
+#define ATF_PARAM_BL31 0x03
+
+#define ATF_VERSION_1 0x01
+
+#define ATF_EP_SECURE 0x0
+#define ATF_EP_NON_SECURE 0x1
+
+#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 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)
+
+#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)
+
+#define DAIF_FIQ_BIT (1<<0)
+#define DAIF_IRQ_BIT (1<<1)
+#define DAIF_ABT_BIT (1<<2)
+#define DAIF_DBG_BIT (1<<3)
+#define DISABLE_ALL_EXECPTIONS \
+ (DAIF_FIQ_BIT | DAIF_IRQ_BIT | DAIF_ABT_BIT | DAIF_DBG_BIT)
+
+#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 {
+ 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 {
+ 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 at 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 {
+ struct param_header h;
+ uintptr_t pc;
+ uint32_t spsr;
+ struct aapcs64_params 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 {
+ struct param_header 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 {
+ /* 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 atf_image_info;
+ struct entry_point_info 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 {
+ struct param_header h;
+ struct atf_image_info *bl31_image_info;
+ struct entry_point_info *bl32_ep_info;
+ struct atf_image_info *bl32_image_info;
+ struct entry_point_info *bl33_ep_info;
+ struct atf_image_info *bl33_image_info;
+};
+
+void bl31_entry(uintptr_t bl31_entry, uintptr_t bl32_entry,
+ uintptr_t bl33_entry, uintptr_t fdt_addr);
+
+#endif /*__ASSEMBLY__ */
+
+#endif /* __BL_COMMON_H__ */