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Diffstat (limited to '')
| -rw-r--r-- | plat/nvidia/tegra/drivers/memctrl/memctrl_v1.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/drivers/memctrl/memctrl_v1.c b/plat/nvidia/tegra/drivers/memctrl/memctrl_v1.c new file mode 100644 index 0000000..b3dcd2a --- /dev/null +++ b/plat/nvidia/tegra/drivers/memctrl/memctrl_v1.c @@ -0,0 +1,212 @@ +/* + * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2020, NVIDIA Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <string.h> + +#include <arch_helpers.h> +#include <common/debug.h> +#include <lib/mmio.h> +#include <lib/utils.h> +#include <lib/xlat_tables/xlat_tables_v2.h> + +#include <memctrl.h> +#include <memctrl_v1.h> +#include <tegra_def.h> + +/* Video Memory base and size (live values) */ +static uint64_t video_mem_base; +static uint64_t video_mem_size; + +/* + * Init SMMU. + */ +void tegra_memctrl_setup(void) +{ + /* + * Setup the Memory controller to allow only secure accesses to + * the TZDRAM carveout + */ + INFO("Tegra Memory Controller (v1)\n"); + + /* allow translations for all MC engines */ + tegra_mc_write_32(MC_SMMU_TRANSLATION_ENABLE_0_0, + (unsigned int)MC_SMMU_TRANSLATION_ENABLE); + tegra_mc_write_32(MC_SMMU_TRANSLATION_ENABLE_1_0, + (unsigned int)MC_SMMU_TRANSLATION_ENABLE); + tegra_mc_write_32(MC_SMMU_TRANSLATION_ENABLE_2_0, + (unsigned int)MC_SMMU_TRANSLATION_ENABLE); + tegra_mc_write_32(MC_SMMU_TRANSLATION_ENABLE_3_0, + (unsigned int)MC_SMMU_TRANSLATION_ENABLE); + tegra_mc_write_32(MC_SMMU_TRANSLATION_ENABLE_4_0, + (unsigned int)MC_SMMU_TRANSLATION_ENABLE); + + tegra_mc_write_32(MC_SMMU_ASID_SECURITY_0, MC_SMMU_ASID_SECURITY); + + tegra_mc_write_32(MC_SMMU_TLB_CONFIG_0, MC_SMMU_TLB_CONFIG_0_RESET_VAL); + tegra_mc_write_32(MC_SMMU_PTC_CONFIG_0, MC_SMMU_PTC_CONFIG_0_RESET_VAL); + + /* flush PTC and TLB */ + tegra_mc_write_32(MC_SMMU_PTC_FLUSH_0, MC_SMMU_PTC_FLUSH_ALL); + (void)tegra_mc_read_32(MC_SMMU_CONFIG_0); /* read to flush writes */ + tegra_mc_write_32(MC_SMMU_TLB_FLUSH_0, MC_SMMU_TLB_FLUSH_ALL); + + /* enable SMMU */ + tegra_mc_write_32(MC_SMMU_CONFIG_0, + MC_SMMU_CONFIG_0_SMMU_ENABLE_ENABLE); + (void)tegra_mc_read_32(MC_SMMU_CONFIG_0); /* read to flush writes */ + + /* video memory carveout */ + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_HI, + (uint32_t)(video_mem_base >> 32)); + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_LO, (uint32_t)video_mem_base); + tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, video_mem_size); +} + +/* + * Restore Memory Controller settings after "System Suspend" + */ +void tegra_memctrl_restore_settings(void) +{ + tegra_memctrl_setup(); +} + +/* + * Secure the BL31 DRAM aperture. + * + * phys_base = physical base of TZDRAM aperture + * size_in_bytes = size of aperture in bytes + */ +void tegra_memctrl_tzdram_setup(uint64_t phys_base, uint32_t size_in_bytes) +{ + /* + * Setup the Memory controller to allow only secure accesses to + * the TZDRAM carveout + */ + INFO("Configuring TrustZone DRAM Memory Carveout\n"); + + tegra_mc_write_32(MC_SECURITY_CFG0_0, phys_base); + tegra_mc_write_32(MC_SECURITY_CFG1_0, size_in_bytes >> 20); +} + +static void tegra_clear_videomem(uintptr_t non_overlap_area_start, + unsigned long long non_overlap_area_size) +{ + int ret; + + /* + * Map the NS memory first, clean it and then unmap it. + */ + ret = mmap_add_dynamic_region(non_overlap_area_start, /* PA */ + non_overlap_area_start, /* VA */ + non_overlap_area_size, /* size */ + MT_NS | MT_RW | MT_EXECUTE_NEVER | + MT_NON_CACHEABLE); /* attrs */ + assert(ret == 0); + + zeromem((void *)non_overlap_area_start, non_overlap_area_size); + flush_dcache_range(non_overlap_area_start, non_overlap_area_size); + + mmap_remove_dynamic_region(non_overlap_area_start, + non_overlap_area_size); +} + +/* + * Program the Video Memory carveout region + * + * phys_base = physical base of aperture + * size_in_bytes = size of aperture in bytes + */ +void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes) +{ + uintptr_t vmem_end_old = video_mem_base + (video_mem_size << 20); + uintptr_t vmem_end_new = phys_base + size_in_bytes; + unsigned long long non_overlap_area_size; + + /* + * Setup the Memory controller to restrict CPU accesses to the Video + * Memory region + */ + INFO("Configuring Video Memory Carveout\n"); + + /* + * Configure Memory Controller directly for the first time. + */ + if (video_mem_base == 0) + goto done; + + /* + * Clear the old regions now being exposed. The following cases + * can occur - + * + * 1. clear whole old region (no overlap with new region) + * 2. clear old sub-region below new base + * 3. clear old sub-region above new end + */ + INFO("Cleaning previous Video Memory Carveout\n"); + + if (phys_base > vmem_end_old || video_mem_base > vmem_end_new) { + tegra_clear_videomem(video_mem_base, video_mem_size << 20); + } else { + if (video_mem_base < phys_base) { + non_overlap_area_size = phys_base - video_mem_base; + tegra_clear_videomem(video_mem_base, non_overlap_area_size); + } + if (vmem_end_old > vmem_end_new) { + non_overlap_area_size = vmem_end_old - vmem_end_new; + tegra_clear_videomem(vmem_end_new, non_overlap_area_size); + } + } + +done: + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_HI, (uint32_t)(phys_base >> 32)); + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_LO, (uint32_t)phys_base); + tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, size_in_bytes >> 20); + + /* store new values */ + video_mem_base = phys_base; + video_mem_size = size_in_bytes >> 20; +} + +/* + * During boot, USB3 and flash media (SDMMC/SATA) devices need access to + * IRAM. Because these clients connect to the MC and do not have a direct + * path to the IRAM, the MC implements AHB redirection during boot to allow + * path to IRAM. In this mode, accesses to a programmed memory address aperture + * are directed to the AHB bus, allowing access to the IRAM. The AHB aperture + * is defined by the IRAM_BASE_LO and IRAM_BASE_HI registers, which are + * initialized to disable this aperture. + * + * Once bootup is complete, we must program IRAM base to 0xffffffff and + * IRAM top to 0x00000000, thus disabling access to IRAM. DRAM is then + * potentially accessible in this address range. These aperture registers + * also have an access_control/lock bit. After disabling the aperture, the + * access_control register should be programmed to lock the registers. + */ +void tegra_memctrl_disable_ahb_redirection(void) +{ + /* program the aperture registers */ + tegra_mc_write_32(MC_IRAM_BASE_LO, 0xFFFFFFFF); + tegra_mc_write_32(MC_IRAM_TOP_LO, 0); + tegra_mc_write_32(MC_IRAM_BASE_TOP_HI, 0); + + /* lock the aperture registers */ + tegra_mc_write_32(MC_IRAM_REG_CTRL, MC_DISABLE_IRAM_CFG_WRITES); +} + +void tegra_memctrl_clear_pending_interrupts(void) +{ + uint32_t mcerr; + + /* check if there are any pending interrupts */ + mcerr = mmio_read_32(TEGRA_MC_BASE + MC_INTSTATUS); + + if (mcerr != (uint32_t)0U) { /* should not see error here */ + WARN("MC_INTSTATUS = 0x%x (should be zero)\n", mcerr); + mmio_write_32((TEGRA_MC_BASE + MC_INTSTATUS), mcerr); + } +} |