diff options
Diffstat (limited to 'plat/nvidia/tegra/drivers/memctrl/memctrl_v2.c')
| -rw-r--r-- | plat/nvidia/tegra/drivers/memctrl/memctrl_v2.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/drivers/memctrl/memctrl_v2.c b/plat/nvidia/tegra/drivers/memctrl/memctrl_v2.c new file mode 100644 index 0000000..0644fd2 --- /dev/null +++ b/plat/nvidia/tegra/drivers/memctrl/memctrl_v2.c @@ -0,0 +1,354 @@ +/* + * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2019-2020, NVIDIA Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <string.h> + +#include <arch_helpers.h> +#include <common/bl_common.h> +#include <common/debug.h> +#include <lib/mmio.h> +#include <lib/utils.h> +#include <lib/xlat_tables/xlat_tables_v2.h> + +#include <mce.h> +#include <memctrl.h> +#include <memctrl_v2.h> +#include <smmu.h> +#include <tegra_def.h> +#include <tegra_platform.h> +#include <tegra_private.h> + +/* Video Memory base and size (live values) */ +static uint64_t video_mem_base; +static uint64_t video_mem_size_mb; + +/* + * Init Memory controller during boot. + */ +void tegra_memctrl_setup(void) +{ + INFO("Tegra Memory Controller (v2)\n"); + + /* Initialize the System memory management unit */ + tegra_smmu_init(); + + /* allow platforms to program custom memory controller settings */ + plat_memctrl_setup(); + + /* + * All requests at boot time, and certain requests during + * normal run time, are physically addressed and must bypass + * the SMMU. The client hub logic implements a hardware bypass + * path around the Translation Buffer Units (TBU). During + * boot-time, the SMMU_BYPASS_CTRL register (which defaults to + * TBU_BYPASS mode) will be used to steer all requests around + * the uninitialized TBUs. During normal operation, this register + * is locked into TBU_BYPASS_SID config, which routes requests + * with special StreamID 0x7f on the bypass path and all others + * through the selected TBU. This is done to disable SMMU Bypass + * mode, as it could be used to circumvent SMMU security checks. + */ + tegra_mc_write_32(MC_SMMU_BYPASS_CONFIG, + MC_SMMU_BYPASS_CONFIG_SETTINGS); +} + +/* + * Restore Memory Controller settings after "System Suspend" + */ +void tegra_memctrl_restore_settings(void) +{ + /* restore platform's memory controller settings */ + plat_memctrl_restore(); + + /* video memory carveout region */ + if (video_mem_base != 0ULL) { + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_LO, + (uint32_t)video_mem_base); + assert(tegra_mc_read_32(MC_VIDEO_PROTECT_BASE_LO) + == (uint32_t)video_mem_base); + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_HI, + (uint32_t)(video_mem_base >> 32)); + assert(tegra_mc_read_32(MC_VIDEO_PROTECT_BASE_HI) + == (uint32_t)(video_mem_base >> 32)); + tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, + (uint32_t)video_mem_size_mb); + assert(tegra_mc_read_32(MC_VIDEO_PROTECT_SIZE_MB) + == (uint32_t)video_mem_size_mb); + + /* + * MCE propagates the VideoMem configuration values across the + * CCPLEX. + */ + mce_update_gsc_videomem(); + } +} + +/* + * 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) +{ + /* + * Perform platform specific steps. + */ + plat_memctrl_tzdram_setup(phys_base, size_in_bytes); +} + +/* + * Secure the BL31 TZRAM aperture. + * + * phys_base = physical base of TZRAM aperture + * size_in_bytes = size of aperture in bytes + */ +void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes) +{ + ; /* do nothing */ +} + +/* + * Save MC settings before "System Suspend" to TZDRAM + */ +void tegra_mc_save_context(uint64_t mc_ctx_addr) +{ + uint32_t i, num_entries = 0; + mc_regs_t *mc_ctx_regs; + const plat_params_from_bl2_t *params_from_bl2 = bl31_get_plat_params(); + uint64_t tzdram_base = params_from_bl2->tzdram_base; + uint64_t tzdram_end = tzdram_base + params_from_bl2->tzdram_size; + + assert((mc_ctx_addr >= tzdram_base) && (mc_ctx_addr <= tzdram_end)); + + /* get MC context table */ + mc_ctx_regs = plat_memctrl_get_sys_suspend_ctx(); + assert(mc_ctx_regs != NULL); + + /* + * mc_ctx_regs[0].val contains the size of the context table minus + * the last entry. Sanity check the table size before we start with + * the context save operation. + */ + while (mc_ctx_regs[num_entries].reg != 0xFFFFFFFFU) { + num_entries++; + } + + /* panic if the sizes do not match */ + if (num_entries != mc_ctx_regs[0].val) { + ERROR("MC context size mismatch!"); + panic(); + } + + /* save MC register values */ + for (i = 1U; i < num_entries; i++) { + mc_ctx_regs[i].val = mmio_read_32(mc_ctx_regs[i].reg); + } + + /* increment by 1 to take care of the last entry */ + num_entries++; + + /* Save MC config settings */ + (void)memcpy((void *)mc_ctx_addr, mc_ctx_regs, + sizeof(mc_regs_t) * num_entries); + + /* save the MC table address */ + mmio_write_32(TEGRA_SCRATCH_BASE + SCRATCH_MC_TABLE_ADDR_LO, + (uint32_t)mc_ctx_addr); + assert(mmio_read_32(TEGRA_SCRATCH_BASE + SCRATCH_MC_TABLE_ADDR_LO) + == (uint32_t)mc_ctx_addr); + mmio_write_32(TEGRA_SCRATCH_BASE + SCRATCH_MC_TABLE_ADDR_HI, + (uint32_t)(mc_ctx_addr >> 32)); + assert(mmio_read_32(TEGRA_SCRATCH_BASE + SCRATCH_MC_TABLE_ADDR_HI) + == (uint32_t)(mc_ctx_addr >> 32)); +} + +static void tegra_lock_videomem_nonoverlap(uint64_t phys_base, + uint64_t size_in_bytes) +{ + uint32_t index; + uint64_t total_128kb_blocks = size_in_bytes >> 17; + uint64_t residual_4kb_blocks = (size_in_bytes & (uint32_t)0x1FFFF) >> 12; + uint64_t val; + + /* + * Reset the access configuration registers to restrict access to + * old Videomem aperture + */ + for (index = MC_VIDEO_PROTECT_CLEAR_ACCESS_CFG0; + index < ((uint32_t)MC_VIDEO_PROTECT_CLEAR_ACCESS_CFG0 + (uint32_t)MC_GSC_CONFIG_REGS_SIZE); + index += 4U) { + tegra_mc_write_32(index, 0); + } + + /* + * Set the base. It must be 4k aligned, at least. + */ + assert((phys_base & (uint64_t)0xFFF) == 0U); + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_LO, (uint32_t)phys_base); + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_HI, + (uint32_t)(phys_base >> 32) & (uint32_t)MC_GSC_BASE_HI_MASK); + + /* + * Set the aperture size + * + * total size = (number of 128KB blocks) + (number of remaining 4KB + * blocks) + * + */ + val = (uint32_t)((residual_4kb_blocks << MC_GSC_SIZE_RANGE_4KB_SHIFT) | + total_128kb_blocks); + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_SIZE, (uint32_t)val); + + /* + * Lock the configuration settings by enabling TZ-only lock and + * locking the configuration against any future changes from NS + * world. + */ + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_CFG, + (uint32_t)MC_GSC_ENABLE_TZ_LOCK_BIT); + + /* + * MCE propagates the GSC configuration values across the + * CCPLEX. + */ +} + +static void tegra_unlock_videomem_nonoverlap(void) +{ + /* Clear the base */ + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_LO, 0); + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_HI, 0); + + /* Clear the size */ + tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_SIZE, 0); +} + +static void tegra_clear_videomem(uintptr_t non_overlap_area_start, + unsigned long long non_overlap_area_size) +{ + int ret; + + INFO("Cleaning previous Video Memory Carveout\n"); + + /* + * 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_DEVICE | MT_RW | MT_NS); /* 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); + + ret = mmap_remove_dynamic_region(non_overlap_area_start, + non_overlap_area_size); + assert(ret == 0); +} + +static void tegra_clear_videomem_nonoverlap(uintptr_t phys_base, + unsigned long size_in_bytes) +{ + uintptr_t vmem_end_old = video_mem_base + (video_mem_size_mb << 20); + uintptr_t vmem_end_new = phys_base + size_in_bytes; + unsigned long long non_overlap_area_size; + + /* + * 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 + */ + if ((phys_base > vmem_end_old) || (video_mem_base > vmem_end_new)) { + tegra_clear_videomem(video_mem_base, + video_mem_size_mb << 20U); + } 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); + } + } +} + +/* + * 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) +{ + /* + * Setup the Memory controller to restrict CPU accesses to the Video + * Memory region + */ + + INFO("Configuring Video Memory Carveout\n"); + + if (video_mem_base != 0U) { + /* + * Lock the non overlapping memory being cleared so that + * other masters do not accidentally write to it. The memory + * would be unlocked once the non overlapping region is + * cleared and the new memory settings take effect. + */ + tegra_lock_videomem_nonoverlap(video_mem_base, + video_mem_size_mb << 20); + } + + /* program the Videomem aperture */ + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_LO, (uint32_t)phys_base); + tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_HI, + (uint32_t)(phys_base >> 32)); + tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, size_in_bytes >> 20); + + /* Redundancy check for Video Protect setting */ + assert(tegra_mc_read_32(MC_VIDEO_PROTECT_BASE_LO) + == (uint32_t)phys_base); + assert(tegra_mc_read_32(MC_VIDEO_PROTECT_BASE_HI) + == (uint32_t)(phys_base >> 32)); + assert(tegra_mc_read_32(MC_VIDEO_PROTECT_SIZE_MB) + == (size_in_bytes >> 20)); + + /* + * MCE propagates the VideoMem configuration values across the + * CCPLEX. + */ + (void)mce_update_gsc_videomem(); + + /* Clear the non-overlapping memory */ + if (video_mem_base != 0U) { + tegra_clear_videomem_nonoverlap(phys_base, size_in_bytes); + tegra_unlock_videomem_nonoverlap(); + } + + /* store new values */ + video_mem_base = phys_base; + video_mem_size_mb = (uint64_t)size_in_bytes >> 20; +} + +/* + * This feature exists only for v1 of the Tegra Memory Controller. + */ +void tegra_memctrl_disable_ahb_redirection(void) +{ + ; /* do nothing */ +} + +void tegra_memctrl_clear_pending_interrupts(void) +{ + ; /* do nothing */ +} |