rpi3: Introduce AArch64 Raspberry Pi 3 port
This port can be compiled to boot an AArch64 or AArch32 payload with the
build option `RPI3_BL33_AARCH32`.
Note: This is not a secure port of the Trusted Firmware. This port is
only meant to be a reference implementation to experiment with an
inexpensive board in real hardware.
Change-Id: Ide58114299289bf765ef1366199eb05c46f81903
Co-authored-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/rpi3/aarch64/plat_helpers.S b/plat/rpi3/aarch64/plat_helpers.S
new file mode 100644
index 0000000..76a542f
--- /dev/null
+++ b/plat/rpi3/aarch64/plat_helpers.S
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <assert_macros.S>
+#include <platform_def.h>
+
+#include "../rpi3_hw.h"
+
+ .globl plat_crash_console_flush
+ .globl plat_crash_console_init
+ .globl plat_crash_console_putc
+ .globl platform_mem_init
+ .globl plat_get_my_entrypoint
+ .globl plat_is_my_cpu_primary
+ .globl plat_my_core_pos
+ .globl plat_reset_handler
+ .globl plat_rpi3_calc_core_pos
+ .globl plat_secondary_cold_boot_setup
+
+ /* -----------------------------------------------------
+ * unsigned int plat_my_core_pos(void)
+ *
+ * This function uses the plat_rpi3_calc_core_pos()
+ * definition to get the index of the calling CPU.
+ * -----------------------------------------------------
+ */
+func plat_my_core_pos
+ mrs x0, mpidr_el1
+ b plat_rpi3_calc_core_pos
+endfunc plat_my_core_pos
+
+ /* -----------------------------------------------------
+ * unsigned int plat_rpi3_calc_core_pos(u_register_t mpidr);
+ *
+ * CorePos = (ClusterId * 4) + CoreId
+ * -----------------------------------------------------
+ */
+func plat_rpi3_calc_core_pos
+ and x1, x0, #MPIDR_CPU_MASK
+ and x0, x0, #MPIDR_CLUSTER_MASK
+ add x0, x1, x0, LSR #6
+ ret
+endfunc plat_rpi3_calc_core_pos
+
+ /* -----------------------------------------------------
+ * unsigned int plat_is_my_cpu_primary (void);
+ *
+ * Find out whether the current cpu is the primary
+ * cpu.
+ * -----------------------------------------------------
+ */
+func plat_is_my_cpu_primary
+ mrs x0, mpidr_el1
+ and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)
+ cmp x0, #RPI3_PRIMARY_CPU
+ cset w0, eq
+ ret
+endfunc plat_is_my_cpu_primary
+
+ /* -----------------------------------------------------
+ * void plat_secondary_cold_boot_setup (void);
+ *
+ * This function performs any platform specific actions
+ * needed for a secondary cpu after a cold reset e.g
+ * mark the cpu's presence, mechanism to place it in a
+ * holding pen etc.
+ * -----------------------------------------------------
+ */
+func plat_secondary_cold_boot_setup
+ /* Calculate address of our hold entry */
+ bl plat_my_core_pos
+ lsl x0, x0, #3
+ mov_imm x2, PLAT_RPI3_TM_HOLD_BASE
+ add x0, x0, x2
+
+ /*
+ * This code runs way before requesting the warmboot of this core,
+ * so it is possible to clear the mailbox before getting a request
+ * to boot.
+ */
+ mov x1, PLAT_RPI3_TM_HOLD_STATE_WAIT
+ str x1,[x0]
+
+ /* Wait until we have a go */
+poll_mailbox:
+ wfe
+ ldr x1, [x0]
+ cmp x1, PLAT_RPI3_TM_HOLD_STATE_GO
+ bne poll_mailbox
+
+ /* Jump to the provided entrypoint */
+ mov_imm x0, PLAT_RPI3_TM_ENTRYPOINT
+ ldr x1, [x0]
+ br x1
+endfunc plat_secondary_cold_boot_setup
+
+ /* ---------------------------------------------------------------------
+ * uintptr_t plat_get_my_entrypoint (void);
+ *
+ * Main job of this routine is to distinguish between a cold and a warm
+ * boot.
+ *
+ * This functions returns:
+ * - 0 for a cold boot.
+ * - Any other value for a warm boot.
+ * ---------------------------------------------------------------------
+ */
+func plat_get_my_entrypoint
+ /* TODO: support warm boot */
+ mov x0, #0
+ ret
+endfunc plat_get_my_entrypoint
+
+ /* ---------------------------------------------
+ * void platform_mem_init (void);
+ *
+ * No need to carry out any memory initialization.
+ * ---------------------------------------------
+ */
+func platform_mem_init
+ ret
+endfunc platform_mem_init
+
+ /* ---------------------------------------------
+ * int plat_crash_console_init(void)
+ * Function to initialize the crash console
+ * without a C Runtime to print crash report.
+ * Clobber list : x0 - x3
+ * ---------------------------------------------
+ */
+func plat_crash_console_init
+ mov_imm x0, PLAT_RPI3_UART_BASE
+ mov_imm x1, PLAT_RPI3_UART_CLK_IN_HZ
+ mov_imm x2, PLAT_RPI3_UART_BAUDRATE
+ b console_core_init
+endfunc plat_crash_console_init
+
+ /* ---------------------------------------------
+ * int plat_crash_console_putc(int c)
+ * Function to print a character on the crash
+ * console without a C Runtime.
+ * Clobber list : x1, x2
+ * ---------------------------------------------
+ */
+func plat_crash_console_putc
+ mov_imm x1, PLAT_RPI3_UART_BASE
+ b console_core_putc
+endfunc plat_crash_console_putc
+
+ /* ---------------------------------------------
+ * int plat_crash_console_flush()
+ * Function to force a write of all buffered
+ * data that hasn't been output.
+ * Out : return -1 on error else return 0.
+ * Clobber list : x0, x1
+ * ---------------------------------------------
+ */
+func plat_crash_console_flush
+ mov_imm x1, PLAT_RPI3_UART_BASE
+ b console_core_flush
+endfunc plat_crash_console_flush
+
+ /* ---------------------------------------------
+ * void plat_reset_handler(void);
+ * ---------------------------------------------
+ */
+func plat_reset_handler
+ /* use the 19.2 MHz clock for the architected timer */
+ mov x0, #RPI3_INTC_BASE_ADDRESS
+ mov w1, #0x80000000
+ str wzr, [x0, #RPI3_INTC_CONTROL_OFFSET]
+ str w1, [x0, #RPI3_INTC_PRESCALER_OFFSET]
+
+ /* wire mailbox 3 to the FIQ line */
+ mov w1, RPI3_INTC_MBOX_CONTROL_SLOT3_FIQ
+ str w1, [x0, #RPI3_INTC_MBOX_CONTROL_OFFSET]
+ ret
+endfunc plat_reset_handler
diff --git a/plat/rpi3/aarch64/rpi3_bl2_mem_params_desc.c b/plat/rpi3/aarch64/rpi3_bl2_mem_params_desc.c
new file mode 100644
index 0000000..e3acfe9
--- /dev/null
+++ b/plat/rpi3/aarch64/rpi3_bl2_mem_params_desc.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <bl_common.h>
+#include <desc_image_load.h>
+#include <platform.h>
+#include <platform_def.h>
+
+/*******************************************************************************
+ * Following descriptor provides BL image/ep information that gets used
+ * by BL2 to load the images and also subset of this information is
+ * passed to next BL image. The image loading sequence is managed by
+ * populating the images in required loading order. The image execution
+ * sequence is managed by populating the `next_handoff_image_id` with
+ * the next executable image id.
+ ******************************************************************************/
+static bl_mem_params_node_t bl2_mem_params_descs[] = {
+
+ /* Fill BL31 related information */
+ {
+ .image_id = BL31_IMAGE_ID,
+
+ SET_STATIC_PARAM_HEAD(ep_info, PARAM_EP,
+ VERSION_2, entry_point_info_t,
+ SECURE | EXECUTABLE | EP_FIRST_EXE),
+ .ep_info.pc = BL31_BASE,
+ .ep_info.spsr = SPSR_64(MODE_EL3, MODE_SP_ELX,
+ DISABLE_ALL_EXCEPTIONS),
+#if DEBUG
+ .ep_info.args.arg1 = RPI3_BL31_PLAT_PARAM_VAL,
+#endif
+ SET_STATIC_PARAM_HEAD(image_info, PARAM_EP,
+ VERSION_2, image_info_t,
+ IMAGE_ATTRIB_PLAT_SETUP),
+ .image_info.image_base = BL31_BASE,
+ .image_info.image_max_size = BL31_LIMIT - BL31_BASE,
+
+# ifdef BL32_BASE
+ .next_handoff_image_id = BL32_IMAGE_ID,
+# else
+ .next_handoff_image_id = BL33_IMAGE_ID,
+# endif
+ },
+
+# ifdef BL32_BASE
+ /* Fill BL32 related information */
+ {
+ .image_id = BL32_IMAGE_ID,
+
+ SET_STATIC_PARAM_HEAD(ep_info, PARAM_EP,
+ VERSION_2, entry_point_info_t,
+ SECURE | EXECUTABLE),
+ .ep_info.pc = BL32_BASE,
+
+ SET_STATIC_PARAM_HEAD(image_info, PARAM_EP,
+ VERSION_2, image_info_t, 0),
+ .image_info.image_base = BL32_BASE,
+ .image_info.image_max_size = BL32_LIMIT - BL32_BASE,
+
+ .next_handoff_image_id = BL33_IMAGE_ID,
+ },
+
+ /*
+ * Fill BL32 external 1 related information.
+ * A typical use for extra1 image is with OP-TEE where it is the pager
+ * image.
+ */
+ {
+ .image_id = BL32_EXTRA1_IMAGE_ID,
+
+ SET_STATIC_PARAM_HEAD(ep_info, PARAM_EP,
+ VERSION_2, entry_point_info_t,
+ SECURE | NON_EXECUTABLE),
+
+ SET_STATIC_PARAM_HEAD(image_info, PARAM_EP,
+ VERSION_2, image_info_t,
+ IMAGE_ATTRIB_SKIP_LOADING),
+ .image_info.image_base = BL32_BASE,
+ .image_info.image_max_size = BL32_LIMIT - BL32_BASE,
+
+ .next_handoff_image_id = INVALID_IMAGE_ID,
+ },
+
+ /*
+ * Fill BL32 external 2 related information.
+ * A typical use for extra2 image is with OP-TEE where it is the paged
+ * image.
+ */
+ {
+ .image_id = BL32_EXTRA2_IMAGE_ID,
+
+ SET_STATIC_PARAM_HEAD(ep_info, PARAM_EP,
+ VERSION_2, entry_point_info_t,
+ SECURE | NON_EXECUTABLE),
+
+ SET_STATIC_PARAM_HEAD(image_info, PARAM_EP,
+ VERSION_2, image_info_t,
+ IMAGE_ATTRIB_SKIP_LOADING),
+ .next_handoff_image_id = INVALID_IMAGE_ID,
+ },
+# endif /* BL32_BASE */
+
+ /* Fill BL33 related information */
+ {
+ .image_id = BL33_IMAGE_ID,
+ SET_STATIC_PARAM_HEAD(ep_info, PARAM_EP,
+ VERSION_2, entry_point_info_t,
+ NON_SECURE | EXECUTABLE),
+# ifdef PRELOADED_BL33_BASE
+ .ep_info.pc = PRELOADED_BL33_BASE,
+
+ SET_STATIC_PARAM_HEAD(image_info, PARAM_EP,
+ VERSION_2, image_info_t,
+ IMAGE_ATTRIB_SKIP_LOADING),
+# else
+ .ep_info.pc = PLAT_RPI3_NS_IMAGE_OFFSET,
+
+ SET_STATIC_PARAM_HEAD(image_info, PARAM_EP,
+ VERSION_2, image_info_t, 0),
+ .image_info.image_base = PLAT_RPI3_NS_IMAGE_OFFSET,
+ .image_info.image_max_size = PLAT_RPI3_NS_IMAGE_MAX_SIZE,
+# endif /* PRELOADED_BL33_BASE */
+
+ .next_handoff_image_id = INVALID_IMAGE_ID,
+ }
+};
+
+REGISTER_BL_IMAGE_DESCS(bl2_mem_params_descs)