diff options
Diffstat (limited to 'plat/rpi/rpi4/rpi4_bl31_setup.c')
-rw-r--r-- | plat/rpi/rpi4/rpi4_bl31_setup.c | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/plat/rpi/rpi4/rpi4_bl31_setup.c b/plat/rpi/rpi4/rpi4_bl31_setup.c deleted file mode 100644 index cfacd1fe1e..0000000000 --- a/plat/rpi/rpi4/rpi4_bl31_setup.c +++ /dev/null @@ -1,260 +0,0 @@ -/* - * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. - * - * SPDX-License-Identifier: BSD-3-Clause - */ - -#include <assert.h> - -#include <libfdt.h> - -#include <platform_def.h> -#include <arch_helpers.h> -#include <common/bl_common.h> -#include <lib/mmio.h> -#include <lib/xlat_tables/xlat_mmu_helpers.h> -#include <lib/xlat_tables/xlat_tables_defs.h> -#include <lib/xlat_tables/xlat_tables_v2.h> -#include <plat/common/platform.h> -#include <common/fdt_fixup.h> -#include <common/fdt_wrappers.h> -#include <libfdt.h> - -#include <drivers/arm/gicv2.h> - -#include <rpi_shared.h> - -/* - * Fields at the beginning of armstub8.bin. - * While building the BL31 image, we put the stub magic into the binary. - * The GPU firmware detects this at boot time, clears that field as a - * confirmation and puts the kernel and DT address in the following words. - */ -extern uint32_t stub_magic; -extern uint32_t dtb_ptr32; -extern uint32_t kernel_entry32; - -static const gicv2_driver_data_t rpi4_gic_data = { - .gicd_base = RPI4_GIC_GICD_BASE, - .gicc_base = RPI4_GIC_GICC_BASE, -}; - -/* - * To be filled by the code below. At the moment BL32 is not supported. - * In the future these might be passed down from BL2. - */ -static entry_point_info_t bl32_image_ep_info; -static entry_point_info_t bl33_image_ep_info; - -/******************************************************************************* - * Return a pointer to the 'entry_point_info' structure of the next image for - * the security state specified. BL33 corresponds to the non-secure image type - * while BL32 corresponds to the secure image type. A NULL pointer is returned - * if the image does not exist. - ******************************************************************************/ -entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) -{ - entry_point_info_t *next_image_info; - - assert(sec_state_is_valid(type) != 0); - - next_image_info = (type == NON_SECURE) - ? &bl33_image_ep_info : &bl32_image_ep_info; - - /* None of the images can have 0x0 as the entrypoint. */ - if (next_image_info->pc) { - return next_image_info; - } else { - return NULL; - } -} - -uintptr_t plat_get_ns_image_entrypoint(void) -{ -#ifdef PRELOADED_BL33_BASE - return PRELOADED_BL33_BASE; -#else - /* Cleared by the GPU if kernel address is valid. */ - if (stub_magic == 0) - return kernel_entry32; - - WARN("Stub magic failure, using default kernel address 0x80000\n"); - return 0x80000; -#endif -} - -static uintptr_t rpi4_get_dtb_address(void) -{ -#ifdef RPI3_PRELOADED_DTB_BASE - return RPI3_PRELOADED_DTB_BASE; -#else - /* Cleared by the GPU if DTB address is valid. */ - if (stub_magic == 0) - return dtb_ptr32; - - WARN("Stub magic failure, DTB address unknown\n"); - return 0; -#endif -} - -static void ldelay(register_t delay) -{ - __asm__ volatile ( - "1:\tcbz %0, 2f\n\t" - "sub %0, %0, #1\n\t" - "b 1b\n" - "2:" - : "=&r" (delay) : "0" (delay) - ); -} - -/******************************************************************************* - * Perform any BL31 early platform setup. Here is an opportunity to copy - * parameters passed by the calling EL (S-EL1 in BL2 & EL3 in BL1) before - * they are lost (potentially). This needs to be done before the MMU is - * initialized so that the memory layout can be used while creating page - * tables. BL2 has flushed this information to memory, so we are guaranteed - * to pick up good data. - ******************************************************************************/ -void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, - u_register_t arg2, u_register_t arg3) - -{ - /* - * LOCAL_CONTROL: - * Bit 9 clear: Increment by 1 (vs. 2). - * Bit 8 clear: Timer source is 19.2MHz crystal (vs. APB). - */ - mmio_write_32(RPI4_LOCAL_CONTROL_BASE_ADDRESS, 0); - - /* LOCAL_PRESCALER; divide-by (0x80000000 / register_val) == 1 */ - mmio_write_32(RPI4_LOCAL_CONTROL_PRESCALER, 0x80000000); - - /* Early GPU firmware revisions need a little break here. */ - ldelay(100000); - - /* Initialize the console to provide early debug support. */ - rpi3_console_init(); - - bl33_image_ep_info.pc = plat_get_ns_image_entrypoint(); - bl33_image_ep_info.spsr = rpi3_get_spsr_for_bl33_entry(); - SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE); - -#if RPI3_DIRECT_LINUX_BOOT -# if RPI3_BL33_IN_AARCH32 - /* - * According to the file ``Documentation/arm/Booting`` of the Linux - * kernel tree, Linux expects: - * r0 = 0 - * r1 = machine type number, optional in DT-only platforms (~0 if so) - * r2 = Physical address of the device tree blob - */ - VERBOSE("rpi4: Preparing to boot 32-bit Linux kernel\n"); - bl33_image_ep_info.args.arg0 = 0U; - bl33_image_ep_info.args.arg1 = ~0U; - bl33_image_ep_info.args.arg2 = rpi4_get_dtb_address(); -# else - /* - * According to the file ``Documentation/arm64/booting.txt`` of the - * Linux kernel tree, Linux expects the physical address of the device - * tree blob (DTB) in x0, while x1-x3 are reserved for future use and - * must be 0. - */ - VERBOSE("rpi4: Preparing to boot 64-bit Linux kernel\n"); - bl33_image_ep_info.args.arg0 = rpi4_get_dtb_address(); - bl33_image_ep_info.args.arg1 = 0ULL; - bl33_image_ep_info.args.arg2 = 0ULL; - bl33_image_ep_info.args.arg3 = 0ULL; -# endif /* RPI3_BL33_IN_AARCH32 */ -#endif /* RPI3_DIRECT_LINUX_BOOT */ -} - -void bl31_plat_arch_setup(void) -{ - /* - * Is the dtb_ptr32 pointer valid? If yes, map the DTB region. - * We map the 2MB region the DTB start address lives in, plus - * the next 2MB, to have enough room for expansion. - */ - if (stub_magic == 0) { - unsigned long long dtb_region = dtb_ptr32; - - dtb_region &= ~0x1fffff; /* Align to 2 MB. */ - mmap_add_region(dtb_region, dtb_region, 4U << 20, - MT_MEMORY | MT_RW | MT_NS); - } - /* - * Add the first page of memory, which holds the stub magic, - * the kernel and the DT address. - * This also holds the secondary CPU's entrypoints and mailboxes. - */ - mmap_add_region(0, 0, 4096, MT_NON_CACHEABLE | MT_RW | MT_SECURE); - - rpi3_setup_page_tables(BL31_BASE, BL31_END - BL31_BASE, - BL_CODE_BASE, BL_CODE_END, - BL_RO_DATA_BASE, BL_RO_DATA_END -#if USE_COHERENT_MEM - , BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END -#endif - ); - - enable_mmu_el3(0); -} - -static void rpi4_prepare_dtb(void) -{ - void *dtb = (void *)rpi4_get_dtb_address(); - uint32_t gic_int_prop[3]; - int ret, offs; - - /* Return if no device tree is detected */ - if (fdt_check_header(dtb) != 0) - return; - - ret = fdt_open_into(dtb, dtb, 0x100000); - if (ret < 0) { - ERROR("Invalid Device Tree at %p: error %d\n", dtb, ret); - return; - } - - if (dt_add_psci_node(dtb)) { - ERROR("Failed to add PSCI Device Tree node\n"); - return; - } - - if (dt_add_psci_cpu_enable_methods(dtb)) { - ERROR("Failed to add PSCI cpu enable methods in Device Tree\n"); - return; - } - - /* Reserve memory used by Trusted Firmware. */ - if (fdt_add_reserved_memory(dtb, "atf@0", 0, 0x80000)) - WARN("Failed to add reserved memory nodes to DT.\n"); - - offs = fdt_node_offset_by_compatible(dtb, 0, "arm,gic-400"); - gic_int_prop[0] = cpu_to_fdt32(1); // PPI - gic_int_prop[1] = cpu_to_fdt32(9); // PPI #9 - gic_int_prop[2] = cpu_to_fdt32(0x0f04); // all cores, level high - fdt_setprop(dtb, offs, "interrupts", gic_int_prop, 12); - - offs = fdt_path_offset(dtb, "/chosen"); - fdt_setprop_string(dtb, offs, "stdout-path", "serial0"); - - ret = fdt_pack(dtb); - if (ret < 0) - ERROR("Failed to pack Device Tree at %p: error %d\n", dtb, ret); - - clean_dcache_range((uintptr_t)dtb, fdt_blob_size(dtb)); - INFO("Changed device tree to advertise PSCI.\n"); -} - -void bl31_platform_setup(void) -{ - rpi4_prepare_dtb(); - - /* Configure the interrupt controller */ - gicv2_driver_init(&rpi4_gic_data); - gicv2_distif_init(); - gicv2_pcpu_distif_init(); - gicv2_cpuif_enable(); -} |