Add basic support for Raspberry Pi 4
The Raspberry Pi 4 is a single board computer with four Cortex-A72
cores. From a TF-A perspective it is quite similar to the Raspberry Pi
3, although it comes with more memory (up to 4GB) and has a GIC.
This initial port though differs quite a lot from the existing rpi3
platform port, mainly due to taking a much simpler and more robust
approach to loading the non-secure payload:
The GPU firmware of the SoC, which is responsible for initial platform
setup (including DRAM initialisation), already loads the kernel, device
tree and the "armstub" into DRAM. We take advantage of this, by placing
just a BL31 component into the armstub8.bin component, which will be
executed first, in AArch64 EL3.
The non-secure payload can be a kernel or a boot loader (U-Boot or
EDK-2), disguised as the "kernel" image and loaded by the GPU firmware.
So this is just a BL31-only port, which directly drops into EL2
and executes whatever has been loaded as the "kernel" image, handing
over the DTB address in x0.
Change-Id: I636f4d1f661821566ad9e341d69ba36f6bbfb546
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/rpi/rpi4/include/plat_macros.S b/plat/rpi/rpi4/include/plat_macros.S
new file mode 100644
index 0000000..6007d03
--- /dev/null
+++ b/plat/rpi/rpi4/include/plat_macros.S
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef PLAT_MACROS_S
+#define PLAT_MACROS_S
+
+ /* ---------------------------------------------
+ * The below required platform porting macro
+ * prints out relevant platform registers
+ * whenever an unhandled exception is taken in
+ * BL31.
+ * Clobbers: x0 - x10, x16, x17, sp
+ * ---------------------------------------------
+ */
+ .macro plat_crash_print_regs
+ .endm
+
+#endif /* PLAT_MACROS_S */
diff --git a/plat/rpi/rpi4/include/platform_def.h b/plat/rpi/rpi4/include/platform_def.h
new file mode 100644
index 0000000..831d1c3
--- /dev/null
+++ b/plat/rpi/rpi4/include/platform_def.h
@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLATFORM_DEF_H
+#define PLATFORM_DEF_H
+
+#include <arch.h>
+#include <common/tbbr/tbbr_img_def.h>
+#include <lib/utils_def.h>
+#include <plat/common/common_def.h>
+
+#include "rpi_hw.h"
+
+/* Special value used to verify platform parameters from BL2 to BL31 */
+#define RPI3_BL31_PLAT_PARAM_VAL ULL(0x0F1E2D3C4B5A6978)
+
+#define PLATFORM_STACK_SIZE ULL(0x1000)
+
+#define PLATFORM_MAX_CPUS_PER_CLUSTER U(4)
+#define PLATFORM_CLUSTER_COUNT U(1)
+#define PLATFORM_CLUSTER0_CORE_COUNT PLATFORM_MAX_CPUS_PER_CLUSTER
+#define PLATFORM_CORE_COUNT PLATFORM_CLUSTER0_CORE_COUNT
+
+#define RPI4_PRIMARY_CPU U(0)
+
+#define PLAT_MAX_PWR_LVL MPIDR_AFFLVL1
+#define PLAT_NUM_PWR_DOMAINS (PLATFORM_CLUSTER_COUNT + \
+ PLATFORM_CORE_COUNT)
+
+#define PLAT_MAX_RET_STATE U(1)
+#define PLAT_MAX_OFF_STATE U(2)
+
+/* Local power state for power domains in Run state. */
+#define PLAT_LOCAL_STATE_RUN U(0)
+/* Local power state for retention. Valid only for CPU power domains */
+#define PLAT_LOCAL_STATE_RET U(1)
+/*
+ * Local power state for OFF/power-down. Valid for CPU and cluster power
+ * domains.
+ */
+#define PLAT_LOCAL_STATE_OFF U(2)
+
+/*
+ * Macros used to parse state information from State-ID if it is using the
+ * recommended encoding for State-ID.
+ */
+#define PLAT_LOCAL_PSTATE_WIDTH U(4)
+#define PLAT_LOCAL_PSTATE_MASK ((U(1) << PLAT_LOCAL_PSTATE_WIDTH) - 1)
+
+/*
+ * Some data must be aligned on the biggest cache line size in the platform.
+ * This is known only to the platform as it might have a combination of
+ * integrated and external caches.
+ */
+#define CACHE_WRITEBACK_SHIFT U(6)
+#define CACHE_WRITEBACK_GRANULE (U(1) << CACHE_WRITEBACK_SHIFT)
+
+/*
+ * Partition memory into secure ROM, non-secure DRAM, secure "SRAM", and
+ * secure DRAM. Note that this is all actually DRAM with different names,
+ * there is no Secure RAM in the Raspberry Pi 4.
+ */
+#if RPI3_USE_UEFI_MAP
+#define SEC_ROM_BASE ULL(0x00000000)
+#define SEC_ROM_SIZE ULL(0x00010000)
+
+/* FIP placed after ROM to append it to BL1 with very little padding. */
+#define PLAT_RPI3_FIP_BASE ULL(0x00020000)
+#define PLAT_RPI3_FIP_MAX_SIZE ULL(0x00010000)
+
+/* Reserve 2M of secure SRAM and DRAM, starting at 2M */
+#define SEC_SRAM_BASE ULL(0x00200000)
+#define SEC_SRAM_SIZE ULL(0x00100000)
+
+#define SEC_DRAM0_BASE ULL(0x00300000)
+#define SEC_DRAM0_SIZE ULL(0x00100000)
+
+/* Windows on ARM requires some RAM at 4M */
+#define NS_DRAM0_BASE ULL(0x00400000)
+#define NS_DRAM0_SIZE ULL(0x00C00000)
+#else
+#define SEC_ROM_BASE ULL(0x00000000)
+#define SEC_ROM_SIZE ULL(0x00020000)
+
+/* FIP placed after ROM to append it to BL1 with very little padding. */
+#define PLAT_RPI3_FIP_BASE ULL(0x00020000)
+#define PLAT_RPI3_FIP_MAX_SIZE ULL(0x001E0000)
+
+/* We have 16M of memory reserved starting at 256M */
+#define SEC_SRAM_BASE ULL(0x10000000)
+#define SEC_SRAM_SIZE ULL(0x00100000)
+
+#define SEC_DRAM0_BASE ULL(0x10100000)
+#define SEC_DRAM0_SIZE ULL(0x00F00000)
+/* End of reserved memory */
+
+#define NS_DRAM0_BASE ULL(0x11000000)
+#define NS_DRAM0_SIZE ULL(0x01000000)
+#endif /* RPI3_USE_UEFI_MAP */
+
+/*
+ * BL33 entrypoint.
+ */
+#define PLAT_RPI3_NS_IMAGE_OFFSET NS_DRAM0_BASE
+#define PLAT_RPI3_NS_IMAGE_MAX_SIZE NS_DRAM0_SIZE
+
+/*
+ * I/O registers.
+ */
+#define DEVICE0_BASE RPI_IO_BASE
+#define DEVICE0_SIZE RPI_IO_SIZE
+
+/*
+ * TF-A lives in SRAM, partition it here
+ */
+#define SHARED_RAM_BASE SEC_SRAM_BASE
+#define SHARED_RAM_SIZE ULL(0x00001000)
+
+#define BL_RAM_BASE (SHARED_RAM_BASE + SHARED_RAM_SIZE)
+#define BL_RAM_SIZE (SEC_SRAM_SIZE - SHARED_RAM_SIZE)
+
+/*
+ * Mailbox to control the secondary cores. All secondary cores are held in a
+ * wait loop in cold boot. To release them perform the following steps (plus
+ * any additional barriers that may be needed):
+ *
+ * uint64_t *entrypoint = (uint64_t *)PLAT_RPI3_TM_ENTRYPOINT;
+ * *entrypoint = ADDRESS_TO_JUMP_TO;
+ *
+ * uint64_t *mbox_entry = (uint64_t *)PLAT_RPI3_TM_HOLD_BASE;
+ * mbox_entry[cpu_id] = PLAT_RPI3_TM_HOLD_STATE_GO;
+ *
+ * sev();
+ */
+#define PLAT_RPI3_TRUSTED_MAILBOX_BASE SHARED_RAM_BASE
+
+/* The secure entry point to be used on warm reset by all CPUs. */
+#define PLAT_RPI3_TM_ENTRYPOINT PLAT_RPI3_TRUSTED_MAILBOX_BASE
+#define PLAT_RPI3_TM_ENTRYPOINT_SIZE ULL(8)
+
+/* Hold entries for each CPU. */
+#define PLAT_RPI3_TM_HOLD_BASE (PLAT_RPI3_TM_ENTRYPOINT + \
+ PLAT_RPI3_TM_ENTRYPOINT_SIZE)
+#define PLAT_RPI3_TM_HOLD_ENTRY_SIZE ULL(8)
+#define PLAT_RPI3_TM_HOLD_SIZE (PLAT_RPI3_TM_HOLD_ENTRY_SIZE * \
+ PLATFORM_CORE_COUNT)
+
+#define PLAT_RPI3_TRUSTED_MAILBOX_SIZE (PLAT_RPI3_TM_ENTRYPOINT_SIZE + \
+ PLAT_RPI3_TM_HOLD_SIZE)
+
+#define PLAT_RPI3_TM_HOLD_STATE_WAIT ULL(0)
+#define PLAT_RPI3_TM_HOLD_STATE_GO ULL(1)
+
+/*
+ * BL31 specific defines.
+ *
+ * Put BL31 at the top of the Trusted SRAM. BL31_BASE is calculated using the
+ * current BL31 debug size plus a little space for growth.
+ */
+#define PLAT_MAX_BL31_SIZE ULL(0x20000)
+
+#define BL31_BASE ULL(0x1000)
+#define BL31_LIMIT ULL(0x100000)
+#define BL31_PROGBITS_LIMIT ULL(0x100000)
+
+#define SEC_SRAM_ID 0
+#define SEC_DRAM_ID 1
+
+/*
+ * Other memory-related defines.
+ */
+#define PLAT_PHY_ADDR_SPACE_SIZE (ULL(1) << 32)
+#define PLAT_VIRT_ADDR_SPACE_SIZE (ULL(1) << 32)
+
+#define MAX_MMAP_REGIONS 8
+#define MAX_XLAT_TABLES 4
+
+#define MAX_IO_DEVICES U(3)
+#define MAX_IO_HANDLES U(4)
+
+#define MAX_IO_BLOCK_DEVICES U(1)
+
+/*
+ * Serial-related constants.
+ */
+#define PLAT_RPI3_UART_BASE RPI3_MINI_UART_BASE
+#define PLAT_RPI3_UART_BAUDRATE ULL(115200)
+
+/*
+ * System counter
+ */
+#define SYS_COUNTER_FREQ_IN_TICKS ULL(54000000)
+
+#endif /* PLATFORM_DEF_H */
diff --git a/plat/rpi/rpi4/include/rpi_hw.h b/plat/rpi/rpi4/include/rpi_hw.h
new file mode 100644
index 0000000..ed367ee
--- /dev/null
+++ b/plat/rpi/rpi4/include/rpi_hw.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RPI_HW_H
+#define RPI_HW_H
+
+#include <lib/utils_def.h>
+
+/*
+ * Peripherals
+ */
+
+#define RPI_IO_BASE ULL(0xFE000000)
+#define RPI_IO_SIZE ULL(0x02000000)
+
+/*
+ * ARM <-> VideoCore mailboxes
+ */
+#define RPI3_MBOX_OFFSET ULL(0x0000B880)
+#define RPI3_MBOX_BASE (RPI_IO_BASE + RPI3_MBOX_OFFSET)
+/* VideoCore -> ARM */
+#define RPI3_MBOX0_READ_OFFSET ULL(0x00000000)
+#define RPI3_MBOX0_PEEK_OFFSET ULL(0x00000010)
+#define RPI3_MBOX0_SENDER_OFFSET ULL(0x00000014)
+#define RPI3_MBOX0_STATUS_OFFSET ULL(0x00000018)
+#define RPI3_MBOX0_CONFIG_OFFSET ULL(0x0000001C)
+/* ARM -> VideoCore */
+#define RPI3_MBOX1_WRITE_OFFSET ULL(0x00000020)
+#define RPI3_MBOX1_PEEK_OFFSET ULL(0x00000030)
+#define RPI3_MBOX1_SENDER_OFFSET ULL(0x00000034)
+#define RPI3_MBOX1_STATUS_OFFSET ULL(0x00000038)
+#define RPI3_MBOX1_CONFIG_OFFSET ULL(0x0000003C)
+/* Mailbox status constants */
+#define RPI3_MBOX_STATUS_FULL_MASK U(0x80000000) /* Set if full */
+#define RPI3_MBOX_STATUS_EMPTY_MASK U(0x40000000) /* Set if empty */
+
+/*
+ * Power management, reset controller, watchdog.
+ */
+#define RPI3_IO_PM_OFFSET ULL(0x00100000)
+#define RPI3_PM_BASE (RPI_IO_BASE + RPI3_IO_PM_OFFSET)
+/* Registers on top of RPI3_PM_BASE. */
+#define RPI3_PM_RSTC_OFFSET ULL(0x0000001C)
+#define RPI3_PM_RSTS_OFFSET ULL(0x00000020)
+#define RPI3_PM_WDOG_OFFSET ULL(0x00000024)
+/* Watchdog constants */
+#define RPI3_PM_PASSWORD U(0x5A000000)
+#define RPI3_PM_RSTC_WRCFG_MASK U(0x00000030)
+#define RPI3_PM_RSTC_WRCFG_FULL_RESET U(0x00000020)
+/*
+ * The RSTS register is used by the VideoCore firmware when booting the
+ * Raspberry Pi to know which partition to boot from. The partition value is
+ * formed by bits 0, 2, 4, 6, 8 and 10. Partition 63 is used by said firmware
+ * to indicate halt.
+ */
+#define RPI3_PM_RSTS_WRCFG_HALT U(0x00000555)
+
+/*
+ * Clock controller
+ */
+#define RPI4_IO_CLOCK_OFFSET ULL(0x00101000)
+#define RPI4_CLOCK_BASE (RPI_IO_BASE + RPI4_IO_CLOCK_OFFSET)
+#define RPI4_VPU_CLOCK_DIVIDER ULL(0x0000000c)
+
+/*
+ * Hardware random number generator.
+ */
+#define RPI3_IO_RNG_OFFSET ULL(0x00104000)
+#define RPI3_RNG_BASE (RPI_IO_BASE + RPI3_IO_RNG_OFFSET)
+#define RPI3_RNG_CTRL_OFFSET ULL(0x00000000)
+#define RPI3_RNG_STATUS_OFFSET ULL(0x00000004)
+#define RPI3_RNG_DATA_OFFSET ULL(0x00000008)
+#define RPI3_RNG_INT_MASK_OFFSET ULL(0x00000010)
+/* Enable/disable RNG */
+#define RPI3_RNG_CTRL_ENABLE U(0x1)
+#define RPI3_RNG_CTRL_DISABLE U(0x0)
+/* Number of currently available words */
+#define RPI3_RNG_STATUS_NUM_WORDS_SHIFT U(24)
+#define RPI3_RNG_STATUS_NUM_WORDS_MASK U(0xFF)
+/* Value to mask interrupts caused by the RNG */
+#define RPI3_RNG_INT_MASK_DISABLE U(0x1)
+
+/*
+ * Serial port (called 'Mini UART' in the Broadcom documentation).
+ */
+#define RPI3_IO_MINI_UART_OFFSET ULL(0x00215040)
+#define RPI3_MINI_UART_BASE (RPI_IO_BASE + RPI3_IO_MINI_UART_OFFSET)
+#define PLAT_RPI4_VPU_CLK_RATE ULL(1000000000)
+
+/*
+ * GPIO controller
+ */
+#define RPI3_IO_GPIO_OFFSET ULL(0x00200000)
+#define RPI3_GPIO_BASE (RPI_IO_BASE + RPI3_IO_GPIO_OFFSET)
+
+/*
+ * SDHost controller
+ */
+#define RPI3_IO_SDHOST_OFFSET ULL(0x00202000)
+#define RPI3_SDHOST_BASE (RPI_IO_BASE + RPI3_IO_SDHOST_OFFSET)
+
+/*
+ * GIC interrupt controller
+ */
+#define RPI_HAVE_GIC
+#define RPI4_GIC_GICD_BASE ULL(0xff841000)
+#define RPI4_GIC_GICC_BASE ULL(0xff842000)
+
+#define RPI4_LOCAL_CONTROL_BASE_ADDRESS ULL(0xff800000)
+#define RPI4_LOCAL_CONTROL_PRESCALER ULL(0xff800008)
+
+#endif /* RPI_HW_H */