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-rw-r--r--lib/xlat_tables/aarch32/nonlpae_tables.c566
-rw-r--r--lib/xlat_tables/aarch32/xlat_tables.c141
-rw-r--r--lib/xlat_tables/aarch64/xlat_tables.c227
-rw-r--r--lib/xlat_tables/xlat_tables_common.c417
-rw-r--r--lib/xlat_tables/xlat_tables_private.h41
5 files changed, 1392 insertions, 0 deletions
diff --git a/lib/xlat_tables/aarch32/nonlpae_tables.c b/lib/xlat_tables/aarch32/nonlpae_tables.c
new file mode 100644
index 0000000..f582404
--- /dev/null
+++ b/lib/xlat_tables/aarch32/nonlpae_tables.c
@@ -0,0 +1,566 @@
+/*
+ * Copyright (c) 2016-2017, Linaro Limited. All rights reserved.
+ * Copyright (c) 2014-2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2014, STMicroelectronics International N.V.
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/cassert.h>
+#include <lib/utils.h>
+#include <lib/xlat_tables/xlat_tables.h>
+
+#include "../xlat_tables_private.h"
+
+#ifdef ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING
+#error "ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING flag is set. \
+This module is to be used when LPAE is not supported"
+#endif
+
+CASSERT(PLAT_VIRT_ADDR_SPACE_SIZE == (1ULL << 32), invalid_vaddr_space_size);
+CASSERT(PLAT_PHY_ADDR_SPACE_SIZE == (1ULL << 32), invalid_paddr_space_size);
+
+#define MMU32B_UNSET_DESC ~0UL
+#define MMU32B_INVALID_DESC 0UL
+
+#define MT_UNKNOWN ~0U
+
+/*
+ * MMU related values
+ */
+
+/* Sharable */
+#define MMU32B_TTB_S (1U << 1)
+
+/* Not Outer Sharable */
+#define MMU32B_TTB_NOS (1U << 5)
+
+/* Normal memory, Inner Non-cacheable */
+#define MMU32B_TTB_IRGN_NC 0U
+
+/* Normal memory, Inner Write-Back Write-Allocate Cacheable */
+#define MMU32B_TTB_IRGN_WBWA (1U << 6)
+
+/* Normal memory, Inner Write-Through Cacheable */
+#define MMU32B_TTB_IRGN_WT 1U
+
+/* Normal memory, Inner Write-Back no Write-Allocate Cacheable */
+#define MMU32B_TTB_IRGN_WB (1U | (1U << 6))
+
+/* Normal memory, Outer Write-Back Write-Allocate Cacheable */
+#define MMU32B_TTB_RNG_WBWA (1U << 3)
+
+#define MMU32B_DEFAULT_ATTRS \
+ (MMU32B_TTB_S | MMU32B_TTB_NOS | \
+ MMU32B_TTB_IRGN_WBWA | MMU32B_TTB_RNG_WBWA)
+
+/* armv7 memory mapping attributes: section mapping */
+#define SECTION_SECURE (0U << 19)
+#define SECTION_NOTSECURE (1U << 19)
+#define SECTION_SHARED (1U << 16)
+#define SECTION_NOTGLOBAL (1U << 17)
+#define SECTION_ACCESS_FLAG (1U << 10)
+#define SECTION_UNPRIV (1U << 11)
+#define SECTION_RO (1U << 15)
+#define SECTION_TEX(tex) ((((tex) >> 2) << 12) | \
+ ((((tex) >> 1) & 0x1) << 3) | \
+ (((tex) & 0x1) << 2))
+#define SECTION_DEVICE SECTION_TEX(MMU32B_ATTR_DEVICE_INDEX)
+#define SECTION_NORMAL SECTION_TEX(MMU32B_ATTR_DEVICE_INDEX)
+#define SECTION_NORMAL_CACHED \
+ SECTION_TEX(MMU32B_ATTR_IWBWA_OWBWA_INDEX)
+
+#define SECTION_XN (1U << 4)
+#define SECTION_PXN (1U << 0)
+#define SECTION_SECTION (2U << 0)
+
+#define SECTION_PT_NOTSECURE (1U << 3)
+#define SECTION_PT_PT (1U << 0)
+
+#define SMALL_PAGE_SMALL_PAGE (1U << 1)
+#define SMALL_PAGE_SHARED (1U << 10)
+#define SMALL_PAGE_NOTGLOBAL (1U << 11)
+#define SMALL_PAGE_TEX(tex) ((((tex) >> 2) << 6) | \
+ ((((tex) >> 1) & 0x1) << 3) | \
+ (((tex) & 0x1) << 2))
+#define SMALL_PAGE_DEVICE \
+ SMALL_PAGE_TEX(MMU32B_ATTR_DEVICE_INDEX)
+#define SMALL_PAGE_NORMAL \
+ SMALL_PAGE_TEX(MMU32B_ATTR_DEVICE_INDEX)
+#define SMALL_PAGE_NORMAL_CACHED \
+ SMALL_PAGE_TEX(MMU32B_ATTR_IWBWA_OWBWA_INDEX)
+#define SMALL_PAGE_ACCESS_FLAG (1U << 4)
+#define SMALL_PAGE_UNPRIV (1U << 5)
+#define SMALL_PAGE_RO (1U << 9)
+#define SMALL_PAGE_XN (1U << 0)
+
+/* The TEX, C and B bits concatenated */
+#define MMU32B_ATTR_DEVICE_INDEX 0U
+#define MMU32B_ATTR_IWBWA_OWBWA_INDEX 1U
+
+#define MMU32B_PRRR_IDX(idx, tr, nos) (((tr) << (2 * (idx))) | \
+ ((uint32_t)(nos) << ((idx) + 24)))
+#define MMU32B_NMRR_IDX(idx, ir, or) (((ir) << (2 * (idx))) | \
+ ((uint32_t)(or) << (2 * (idx) + 16)))
+#define MMU32B_PRRR_DS0 (1U << 16)
+#define MMU32B_PRRR_DS1 (1U << 17)
+#define MMU32B_PRRR_NS0 (1U << 18)
+#define MMU32B_PRRR_NS1 (1U << 19)
+
+#define DACR_DOMAIN(num, perm) ((perm) << ((num) * 2))
+#define DACR_DOMAIN_PERM_NO_ACCESS 0U
+#define DACR_DOMAIN_PERM_CLIENT 1U
+#define DACR_DOMAIN_PERM_MANAGER 3U
+
+#define NUM_1MB_IN_4GB (1UL << 12)
+#define NUM_4K_IN_1MB (1UL << 8)
+
+#define ONE_MB_SHIFT 20
+
+/* mmu 32b integration */
+#define MMU32B_L1_TABLE_SIZE (NUM_1MB_IN_4GB * 4)
+#define MMU32B_L2_TABLE_SIZE (NUM_4K_IN_1MB * 4)
+#define MMU32B_L1_TABLE_ALIGN (1U << 14)
+#define MMU32B_L2_TABLE_ALIGN (1U << 10)
+
+static unsigned int next_xlat;
+static unsigned long long xlat_max_pa;
+static uintptr_t xlat_max_va;
+
+static uint32_t mmu_l1_base[NUM_1MB_IN_4GB]
+ __aligned(MMU32B_L1_TABLE_ALIGN) __attribute__((section(".xlat_table")));
+
+static uint32_t mmu_l2_base[MAX_XLAT_TABLES][NUM_4K_IN_1MB]
+ __aligned(MMU32B_L2_TABLE_ALIGN) __attribute__((section(".xlat_table")));
+
+/*
+ * Array of all memory regions stored in order of ascending base address.
+ * The list is terminated by the first entry with size == 0.
+ */
+static mmap_region_t mmap[MAX_MMAP_REGIONS + 1];
+
+void print_mmap(void)
+{
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+ mmap_region_t *mm = mmap;
+
+ printf("init xlat - l1:%p l2:%p (%d)\n",
+ (void *)mmu_l1_base, (void *)mmu_l2_base, MAX_XLAT_TABLES);
+ printf("mmap:\n");
+ while (mm->size) {
+ printf(" VA:%p PA:0x%llx size:0x%zx attr:0x%x\n",
+ (void *)mm->base_va, mm->base_pa,
+ mm->size, mm->attr);
+ ++mm;
+ };
+ printf("\n");
+#endif
+}
+
+void mmap_add(const mmap_region_t *mm)
+{
+ const mmap_region_t *mm_cursor = mm;
+
+ while ((mm_cursor->size != 0U) || (mm_cursor->attr != 0U)) {
+ mmap_add_region(mm_cursor->base_pa, mm_cursor->base_va,
+ mm_cursor->size, mm_cursor->attr);
+ mm_cursor++;
+ }
+}
+
+void mmap_add_region(unsigned long long base_pa, uintptr_t base_va,
+ size_t size, unsigned int attr)
+{
+ mmap_region_t *mm = mmap;
+ const mmap_region_t *mm_last = mm + ARRAY_SIZE(mmap) - 1U;
+ unsigned long long end_pa = base_pa + size - 1U;
+ uintptr_t end_va = base_va + size - 1U;
+
+ assert(IS_PAGE_ALIGNED(base_pa));
+ assert(IS_PAGE_ALIGNED(base_va));
+ assert(IS_PAGE_ALIGNED(size));
+
+ if (size == 0U) {
+ return;
+ }
+
+ assert(base_pa < end_pa); /* Check for overflows */
+ assert(base_va < end_va);
+
+ assert((base_va + (uintptr_t)size - (uintptr_t)1) <=
+ (PLAT_VIRT_ADDR_SPACE_SIZE - 1U));
+ assert((base_pa + (unsigned long long)size - 1ULL) <=
+ (PLAT_PHY_ADDR_SPACE_SIZE - 1U));
+
+#if ENABLE_ASSERTIONS
+
+ /* Check for PAs and VAs overlaps with all other regions */
+ for (mm = mmap; mm->size; ++mm) {
+
+ uintptr_t mm_end_va = mm->base_va + mm->size - 1U;
+
+ /*
+ * Check if one of the regions is completely inside the other
+ * one.
+ */
+ bool fully_overlapped_va =
+ ((base_va >= mm->base_va) && (end_va <= mm_end_va)) ||
+ ((mm->base_va >= base_va) && (mm_end_va <= end_va));
+
+ /*
+ * Full VA overlaps are only allowed if both regions are
+ * identity mapped (zero offset) or have the same VA to PA
+ * offset. Also, make sure that it's not the exact same area.
+ */
+ if (fully_overlapped_va) {
+ assert((mm->base_va - mm->base_pa) ==
+ (base_va - base_pa));
+ assert((base_va != mm->base_va) || (size != mm->size));
+ } else {
+ /*
+ * If the regions do not have fully overlapping VAs,
+ * then they must have fully separated VAs and PAs.
+ * Partial overlaps are not allowed
+ */
+
+ unsigned long long mm_end_pa =
+ mm->base_pa + mm->size - 1;
+
+ bool separated_pa = (end_pa < mm->base_pa) ||
+ (base_pa > mm_end_pa);
+ bool separated_va = (end_va < mm->base_va) ||
+ (base_va > mm_end_va);
+
+ assert(separated_va && separated_pa);
+ }
+ }
+
+ mm = mmap; /* Restore pointer to the start of the array */
+
+#endif /* ENABLE_ASSERTIONS */
+
+ /* Find correct place in mmap to insert new region */
+ while ((mm->base_va < base_va) && (mm->size != 0U)) {
+ ++mm;
+ }
+
+ /*
+ * If a section is contained inside another one with the same base
+ * address, it must be placed after the one it is contained in:
+ *
+ * 1st |-----------------------|
+ * 2nd |------------|
+ * 3rd |------|
+ *
+ * This is required for mmap_region_attr() to get the attributes of the
+ * small region correctly.
+ */
+ while ((mm->base_va == base_va) && (mm->size > size)) {
+ ++mm;
+ }
+
+ /* Make room for new region by moving other regions up by one place */
+ (void)memmove(mm + 1, mm, (uintptr_t)mm_last - (uintptr_t)mm);
+
+ /* Check we haven't lost the empty sentinel from the end of the array */
+ assert(mm_last->size == 0U);
+
+ mm->base_pa = base_pa;
+ mm->base_va = base_va;
+ mm->size = size;
+ mm->attr = attr;
+
+ if (end_pa > xlat_max_pa) {
+ xlat_max_pa = end_pa;
+ }
+ if (end_va > xlat_max_va) {
+ xlat_max_va = end_va;
+ }
+}
+
+/* map all memory as shared/global/domain0/no-usr access */
+static uint32_t mmap_desc(unsigned attr, unsigned int addr_pa,
+ unsigned int level)
+{
+ uint32_t desc;
+
+ switch (level) {
+ case 1U:
+ assert((addr_pa & (MMU32B_L1_TABLE_ALIGN - 1)) == 0U);
+
+ desc = SECTION_SECTION | SECTION_SHARED;
+
+ desc |= (attr & MT_NS) != 0U ? SECTION_NOTSECURE : 0U;
+
+ desc |= SECTION_ACCESS_FLAG;
+ desc |= (attr & MT_RW) != 0U ? 0U : SECTION_RO;
+
+ desc |= (attr & MT_MEMORY) != 0U ?
+ SECTION_NORMAL_CACHED : SECTION_DEVICE;
+
+ if (((attr & MT_RW) != 0U) || ((attr & MT_MEMORY) == 0U)) {
+ desc |= SECTION_XN;
+ }
+ break;
+ case 2U:
+ assert((addr_pa & (MMU32B_L2_TABLE_ALIGN - 1)) == 0U);
+
+ desc = SMALL_PAGE_SMALL_PAGE | SMALL_PAGE_SHARED;
+
+ desc |= SMALL_PAGE_ACCESS_FLAG;
+ desc |= (attr & MT_RW) != 0U ? 0U : SMALL_PAGE_RO;
+
+ desc |= (attr & MT_MEMORY) != 0U ?
+ SMALL_PAGE_NORMAL_CACHED : SMALL_PAGE_DEVICE;
+
+ if (((attr & MT_RW) != 0U) || ((attr & MT_MEMORY) == 0U)) {
+ desc |= SMALL_PAGE_XN;
+ }
+ break;
+ default:
+ panic();
+ }
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+ /* dump only the non-lpae level 2 tables */
+ if (level == 2U) {
+ printf(attr & MT_MEMORY ? "MEM" : "dev");
+ printf(attr & MT_RW ? "-rw" : "-RO");
+ printf(attr & MT_NS ? "-NS" : "-S");
+ }
+#endif
+ return desc | addr_pa;
+}
+
+static unsigned int mmap_region_attr(const mmap_region_t *mm, uintptr_t base_va,
+ size_t size, unsigned int *attr)
+{
+ /* Don't assume that the area is contained in the first region */
+ unsigned int ret = MT_UNKNOWN;
+
+ /*
+ * Get attributes from last (innermost) region that contains the
+ * requested area. Don't stop as soon as one region doesn't contain it
+ * because there may be other internal regions that contain this area:
+ *
+ * |-----------------------------1-----------------------------|
+ * |----2----| |-------3-------| |----5----|
+ * |--4--|
+ *
+ * |---| <- Area we want the attributes of.
+ *
+ * In this example, the area is contained in regions 1, 3 and 4 but not
+ * in region 2. The loop shouldn't stop at region 2 as inner regions
+ * have priority over outer regions, it should stop at region 5.
+ */
+ for ( ; ; ++mm) {
+
+ if (mm->size == 0U) {
+ return ret; /* Reached end of list */
+ }
+
+ if (mm->base_va > (base_va + size - 1U)) {
+ return ret; /* Next region is after area so end */
+ }
+
+ if ((mm->base_va + mm->size - 1U) < base_va) {
+ continue; /* Next region has already been overtaken */
+ }
+
+ if ((ret == 0U) && (mm->attr == *attr)) {
+ continue; /* Region doesn't override attribs so skip */
+ }
+
+ if ((mm->base_va > base_va) ||
+ ((mm->base_va + mm->size - 1U) <
+ (base_va + size - 1U))) {
+ return MT_UNKNOWN; /* Region doesn't fully cover area */
+ }
+
+ *attr = mm->attr;
+ ret = 0U;
+ }
+}
+
+static mmap_region_t *init_xlation_table_inner(mmap_region_t *mm,
+ unsigned int base_va,
+ uint32_t *table,
+ unsigned int level)
+{
+ unsigned int level_size_shift = (level == 1U) ?
+ ONE_MB_SHIFT : FOUR_KB_SHIFT;
+ unsigned int level_size = 1U << level_size_shift;
+ unsigned int level_index_mask = (level == 1U) ?
+ (NUM_1MB_IN_4GB - 1) << ONE_MB_SHIFT :
+ (NUM_4K_IN_1MB - 1) << FOUR_KB_SHIFT;
+
+ assert((level == 1U) || (level == 2U));
+
+ VERBOSE("init xlat table at %p (level%1u)\n", (void *)table, level);
+
+ do {
+ uint32_t desc = MMU32B_UNSET_DESC;
+
+ if (mm->base_va + mm->size <= base_va) {
+ /* Area now after the region so skip it */
+ ++mm;
+ continue;
+ }
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+ /* dump only non-lpae level 2 tables content */
+ if (level == 2U) {
+ printf(" 0x%lx %x " + 6 - 2 * level,
+ base_va, level_size);
+ }
+#endif
+ if (mm->base_va >= base_va + level_size) {
+ /* Next region is after area so nothing to map yet */
+ desc = MMU32B_INVALID_DESC;
+ } else if ((mm->base_va <= base_va) &&
+ (mm->base_va + mm->size) >=
+ (base_va + level_size)) {
+ /* Next region covers all of area */
+ unsigned int attr = mm->attr;
+ unsigned int r = mmap_region_attr(mm, base_va,
+ level_size, &attr);
+
+ if (r == 0U) {
+ desc = mmap_desc(attr,
+ base_va - mm->base_va + mm->base_pa,
+ level);
+ }
+ }
+
+ if (desc == MMU32B_UNSET_DESC) {
+ uintptr_t xlat_table;
+
+ /*
+ * Area not covered by a region so need finer table
+ * Reuse next level table if any (assert attrib matching).
+ * Otherwise allocate a xlat table.
+ */
+ if (*table) {
+ assert((*table & 3) == SECTION_PT_PT);
+ assert(((*table & SECTION_PT_NOTSECURE) == 0U)
+ == ((mm->attr & MT_NS) == 0U));
+
+ xlat_table = (*table) &
+ ~(MMU32B_L1_TABLE_ALIGN - 1);
+ desc = *table;
+ } else {
+ xlat_table = (uintptr_t)mmu_l2_base +
+ next_xlat * MMU32B_L2_TABLE_SIZE;
+ next_xlat++;
+ assert(next_xlat <= MAX_XLAT_TABLES);
+ (void)memset((char *)xlat_table, 0,
+ MMU32B_L2_TABLE_SIZE);
+
+ desc = xlat_table | SECTION_PT_PT;
+ desc |= (mm->attr & MT_NS) != 0U ?
+ SECTION_PT_NOTSECURE : 0;
+ }
+ /* Recurse to fill in new table */
+ mm = init_xlation_table_inner(mm, base_va,
+ (uint32_t *)xlat_table,
+ level + 1);
+ }
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+ /* dump only non-lpae level 2 tables content */
+ if (level == 2U) {
+ printf("\n");
+ }
+#endif
+ *table++ = desc;
+ base_va += level_size;
+ } while ((mm->size != 0U) && ((base_va & level_index_mask) != 0U));
+
+ return mm;
+}
+
+void init_xlat_tables(void)
+{
+ print_mmap();
+
+ assert(((unsigned int)mmu_l1_base & (MMU32B_L1_TABLE_ALIGN - 1)) == 0U);
+ assert(((unsigned int)mmu_l2_base & (MMU32B_L2_TABLE_ALIGN - 1)) == 0U);
+
+ (void)memset(mmu_l1_base, 0, MMU32B_L1_TABLE_SIZE);
+
+ init_xlation_table_inner(mmap, 0, (uint32_t *)mmu_l1_base, 1);
+
+ VERBOSE("init xlat - max_va=%p, max_pa=%llx\n",
+ (void *)xlat_max_va, xlat_max_pa);
+ assert(xlat_max_pa <= (PLAT_VIRT_ADDR_SPACE_SIZE - 1));
+}
+
+/*******************************************************************************
+ * Function for enabling the MMU in Secure PL1, assuming that the
+ * page-tables have already been created.
+ ******************************************************************************/
+void enable_mmu_svc_mon(unsigned int flags)
+{
+ unsigned int prrr;
+ unsigned int nmrr;
+ unsigned int sctlr;
+
+ assert(IS_IN_SECURE());
+ assert((read_sctlr() & SCTLR_M_BIT) == 0U);
+
+ /* Enable Access flag (simplified access permissions) and TEX remap */
+ write_sctlr(read_sctlr() | SCTLR_AFE_BIT | SCTLR_TRE_BIT);
+
+ prrr = MMU32B_PRRR_IDX(MMU32B_ATTR_DEVICE_INDEX, 1, 0)
+ | MMU32B_PRRR_IDX(MMU32B_ATTR_IWBWA_OWBWA_INDEX, 2, 1);
+ nmrr = MMU32B_NMRR_IDX(MMU32B_ATTR_DEVICE_INDEX, 0, 0)
+ | MMU32B_NMRR_IDX(MMU32B_ATTR_IWBWA_OWBWA_INDEX, 1, 1);
+
+ prrr |= MMU32B_PRRR_NS1 | MMU32B_PRRR_DS1;
+
+ write_prrr(prrr);
+ write_nmrr(nmrr);
+
+ /* Program Domain access control register: domain 0 only */
+ write_dacr(DACR_DOMAIN(0, DACR_DOMAIN_PERM_CLIENT));
+
+ /* Invalidate TLBs at the current exception level */
+ tlbiall();
+
+ /* set MMU base xlat table entry (use only TTBR0) */
+ write_ttbr0((uint32_t)mmu_l1_base | MMU32B_DEFAULT_ATTRS);
+ write_ttbr1(0U);
+
+ /*
+ * Ensure all translation table writes have drained
+ * into memory, the TLB invalidation is complete,
+ * and translation register writes are committed
+ * before enabling the MMU
+ */
+ dsb();
+ isb();
+
+ sctlr = read_sctlr();
+ sctlr |= SCTLR_M_BIT;
+#ifdef ARMV7_SUPPORTS_VIRTUALIZATION
+ sctlr |= SCTLR_WXN_BIT;
+#endif
+
+ if ((flags & DISABLE_DCACHE) != 0U) {
+ sctlr &= ~SCTLR_C_BIT;
+ } else {
+ sctlr |= SCTLR_C_BIT;
+ }
+
+ write_sctlr(sctlr);
+
+ /* Ensure the MMU enable takes effect immediately */
+ isb();
+}
diff --git a/lib/xlat_tables/aarch32/xlat_tables.c b/lib/xlat_tables/aarch32/xlat_tables.c
new file mode 100644
index 0000000..6d098be
--- /dev/null
+++ b/lib/xlat_tables/aarch32/xlat_tables.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2016-2018, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <lib/utils.h>
+#include <lib/xlat_tables/xlat_tables_arch.h>
+#include <lib/xlat_tables/xlat_tables.h>
+
+#include "../xlat_tables_private.h"
+
+#if (ARM_ARCH_MAJOR == 7) && !defined(ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING)
+#error ARMv7 target does not support LPAE MMU descriptors
+#endif
+
+#define XLAT_TABLE_LEVEL_BASE \
+ GET_XLAT_TABLE_LEVEL_BASE(PLAT_VIRT_ADDR_SPACE_SIZE)
+
+#define NUM_BASE_LEVEL_ENTRIES \
+ GET_NUM_BASE_LEVEL_ENTRIES(PLAT_VIRT_ADDR_SPACE_SIZE)
+
+static uint64_t base_xlation_table[NUM_BASE_LEVEL_ENTRIES]
+ __aligned(NUM_BASE_LEVEL_ENTRIES * sizeof(uint64_t));
+
+#if ENABLE_ASSERTIONS
+static unsigned long long get_max_supported_pa(void)
+{
+ /* Physical address space size for long descriptor format. */
+ return (1ULL << 40) - 1ULL;
+}
+#endif /* ENABLE_ASSERTIONS */
+
+unsigned int xlat_arch_current_el(void)
+{
+ /*
+ * If EL3 is in AArch32 mode, all secure PL1 modes (Monitor, System,
+ * SVC, Abort, UND, IRQ and FIQ modes) execute at EL3.
+ */
+ return 3U;
+}
+
+uint64_t xlat_arch_get_xn_desc(unsigned int el __unused)
+{
+ return UPPER_ATTRS(XN);
+}
+
+void init_xlat_tables(void)
+{
+ unsigned long long max_pa;
+ uintptr_t max_va;
+
+ assert(PLAT_VIRT_ADDR_SPACE_SIZE >= MIN_VIRT_ADDR_SPACE_SIZE);
+ assert(PLAT_VIRT_ADDR_SPACE_SIZE <= MAX_VIRT_ADDR_SPACE_SIZE);
+ assert(IS_POWER_OF_TWO(PLAT_VIRT_ADDR_SPACE_SIZE));
+
+ print_mmap();
+ init_xlation_table(0U, base_xlation_table, XLAT_TABLE_LEVEL_BASE,
+ &max_va, &max_pa);
+
+ assert(max_va <= (PLAT_VIRT_ADDR_SPACE_SIZE - 1U));
+ assert(max_pa <= (PLAT_PHY_ADDR_SPACE_SIZE - 1U));
+ assert((PLAT_PHY_ADDR_SPACE_SIZE - 1U) <= get_max_supported_pa());
+}
+
+void enable_mmu_svc_mon(unsigned int flags)
+{
+ unsigned int mair0, ttbcr, sctlr;
+ uint64_t ttbr0;
+
+ assert(IS_IN_SECURE());
+ assert((read_sctlr() & SCTLR_M_BIT) == 0U);
+
+ /* Set attributes in the right indices of the MAIR */
+ mair0 = MAIR0_ATTR_SET(ATTR_DEVICE, ATTR_DEVICE_INDEX);
+ mair0 |= MAIR0_ATTR_SET(ATTR_IWBWA_OWBWA_NTR,
+ ATTR_IWBWA_OWBWA_NTR_INDEX);
+ mair0 |= MAIR0_ATTR_SET(ATTR_NON_CACHEABLE,
+ ATTR_NON_CACHEABLE_INDEX);
+ write_mair0(mair0);
+
+ /* Invalidate TLBs at the current exception level */
+ tlbiall();
+
+ /*
+ * Set TTBCR bits as well. Set TTBR0 table properties. Disable TTBR1.
+ */
+ int t0sz = 32 - __builtin_ctzll(PLAT_VIRT_ADDR_SPACE_SIZE);
+
+ if ((flags & XLAT_TABLE_NC) != 0U) {
+ /* Inner & outer non-cacheable non-shareable. */
+ ttbcr = TTBCR_EAE_BIT |
+ TTBCR_SH0_NON_SHAREABLE | TTBCR_RGN0_OUTER_NC |
+ TTBCR_RGN0_INNER_NC | (uint32_t) t0sz;
+ } else {
+ /* Inner & outer WBWA & shareable. */
+ ttbcr = TTBCR_EAE_BIT |
+ TTBCR_SH0_INNER_SHAREABLE | TTBCR_RGN0_OUTER_WBA |
+ TTBCR_RGN0_INNER_WBA | (uint32_t) t0sz;
+ }
+ ttbcr |= TTBCR_EPD1_BIT;
+ write_ttbcr(ttbcr);
+
+ /* Set TTBR0 bits as well */
+ ttbr0 = (uintptr_t) base_xlation_table;
+ write64_ttbr0(ttbr0);
+ write64_ttbr1(0U);
+
+ /*
+ * Ensure all translation table writes have drained
+ * into memory, the TLB invalidation is complete,
+ * and translation register writes are committed
+ * before enabling the MMU
+ */
+ dsbish();
+ isb();
+
+ sctlr = read_sctlr();
+ sctlr |= SCTLR_WXN_BIT | SCTLR_M_BIT;
+
+ if ((flags & DISABLE_DCACHE) != 0U)
+ sctlr &= ~SCTLR_C_BIT;
+ else
+ sctlr |= SCTLR_C_BIT;
+
+ write_sctlr(sctlr);
+
+ /* Ensure the MMU enable takes effect immediately */
+ isb();
+}
+
+void enable_mmu_direct_svc_mon(unsigned int flags)
+{
+ enable_mmu_svc_mon(flags);
+}
diff --git a/lib/xlat_tables/aarch64/xlat_tables.c b/lib/xlat_tables/aarch64/xlat_tables.c
new file mode 100644
index 0000000..4dbfc11
--- /dev/null
+++ b/lib/xlat_tables/aarch64/xlat_tables.c
@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2014-2021, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <arch_features.h>
+#include <common/bl_common.h>
+#include <lib/utils.h>
+#include <lib/xlat_tables/xlat_tables.h>
+#include <lib/xlat_tables/xlat_tables_arch.h>
+#include <plat/common/common_def.h>
+
+#include "../xlat_tables_private.h"
+
+#define XLAT_TABLE_LEVEL_BASE \
+ GET_XLAT_TABLE_LEVEL_BASE(PLAT_VIRT_ADDR_SPACE_SIZE)
+
+#define NUM_BASE_LEVEL_ENTRIES \
+ GET_NUM_BASE_LEVEL_ENTRIES(PLAT_VIRT_ADDR_SPACE_SIZE)
+
+static uint64_t base_xlation_table[NUM_BASE_LEVEL_ENTRIES]
+ __aligned(NUM_BASE_LEVEL_ENTRIES * sizeof(uint64_t));
+
+static unsigned long long tcr_ps_bits;
+
+static unsigned long long calc_physical_addr_size_bits(
+ unsigned long long max_addr)
+{
+ /* Physical address can't exceed 48 bits */
+ assert((max_addr & ADDR_MASK_48_TO_63) == 0U);
+
+ /* 48 bits address */
+ if ((max_addr & ADDR_MASK_44_TO_47) != 0U)
+ return TCR_PS_BITS_256TB;
+
+ /* 44 bits address */
+ if ((max_addr & ADDR_MASK_42_TO_43) != 0U)
+ return TCR_PS_BITS_16TB;
+
+ /* 42 bits address */
+ if ((max_addr & ADDR_MASK_40_TO_41) != 0U)
+ return TCR_PS_BITS_4TB;
+
+ /* 40 bits address */
+ if ((max_addr & ADDR_MASK_36_TO_39) != 0U)
+ return TCR_PS_BITS_1TB;
+
+ /* 36 bits address */
+ if ((max_addr & ADDR_MASK_32_TO_35) != 0U)
+ return TCR_PS_BITS_64GB;
+
+ return TCR_PS_BITS_4GB;
+}
+
+#if ENABLE_ASSERTIONS
+/*
+ * Physical Address ranges supported in the AArch64 Memory Model. Value 0b110 is
+ * supported in ARMv8.2 onwards.
+ */
+static const unsigned int pa_range_bits_arr[] = {
+ PARANGE_0000, PARANGE_0001, PARANGE_0010, PARANGE_0011, PARANGE_0100,
+ PARANGE_0101, PARANGE_0110
+};
+
+static unsigned long long get_max_supported_pa(void)
+{
+ u_register_t pa_range = read_id_aa64mmfr0_el1() &
+ ID_AA64MMFR0_EL1_PARANGE_MASK;
+
+ /* All other values are reserved */
+ assert(pa_range < ARRAY_SIZE(pa_range_bits_arr));
+
+ return (1ULL << pa_range_bits_arr[pa_range]) - 1ULL;
+}
+
+/*
+ * Return minimum virtual address space size supported by the architecture
+ */
+static uintptr_t xlat_get_min_virt_addr_space_size(void)
+{
+ uintptr_t ret;
+
+ if (is_armv8_4_ttst_present())
+ ret = MIN_VIRT_ADDR_SPACE_SIZE_TTST;
+ else
+ ret = MIN_VIRT_ADDR_SPACE_SIZE;
+
+ return ret;
+}
+#endif /* ENABLE_ASSERTIONS */
+
+unsigned int xlat_arch_current_el(void)
+{
+ unsigned int el = (unsigned int)GET_EL(read_CurrentEl());
+
+ assert(el > 0U);
+
+ return el;
+}
+
+uint64_t xlat_arch_get_xn_desc(unsigned int el)
+{
+ if (el == 3U) {
+ return UPPER_ATTRS(XN);
+ } else {
+ assert(el == 1U);
+ return UPPER_ATTRS(PXN);
+ }
+}
+
+void init_xlat_tables(void)
+{
+ unsigned long long max_pa;
+ uintptr_t max_va;
+
+ assert(PLAT_VIRT_ADDR_SPACE_SIZE >=
+ (xlat_get_min_virt_addr_space_size() - 1U));
+ assert(PLAT_VIRT_ADDR_SPACE_SIZE <= MAX_VIRT_ADDR_SPACE_SIZE);
+ assert(IS_POWER_OF_TWO(PLAT_VIRT_ADDR_SPACE_SIZE));
+
+ print_mmap();
+ init_xlation_table(0U, base_xlation_table, XLAT_TABLE_LEVEL_BASE,
+ &max_va, &max_pa);
+
+ assert(max_va <= (PLAT_VIRT_ADDR_SPACE_SIZE - 1U));
+ assert(max_pa <= (PLAT_PHY_ADDR_SPACE_SIZE - 1U));
+ assert((PLAT_PHY_ADDR_SPACE_SIZE - 1U) <= get_max_supported_pa());
+
+ tcr_ps_bits = calc_physical_addr_size_bits(max_pa);
+}
+
+/*******************************************************************************
+ * Macro generating the code for the function enabling the MMU in the given
+ * exception level, assuming that the pagetables have already been created.
+ *
+ * _el: Exception level at which the function will run
+ * _tcr_extra: Extra bits to set in the TCR register. This mask will
+ * be OR'ed with the default TCR value.
+ * _tlbi_fct: Function to invalidate the TLBs at the current
+ * exception level
+ ******************************************************************************/
+#define DEFINE_ENABLE_MMU_EL(_el, _tcr_extra, _tlbi_fct) \
+ void enable_mmu_el##_el(unsigned int flags) \
+ { \
+ uint64_t mair, tcr, ttbr; \
+ uint32_t sctlr; \
+ \
+ assert(IS_IN_EL(_el)); \
+ assert((read_sctlr_el##_el() & SCTLR_M_BIT) == 0U); \
+ \
+ /* Set attributes in the right indices of the MAIR */ \
+ mair = MAIR_ATTR_SET(ATTR_DEVICE, ATTR_DEVICE_INDEX); \
+ mair |= MAIR_ATTR_SET(ATTR_IWBWA_OWBWA_NTR, \
+ ATTR_IWBWA_OWBWA_NTR_INDEX); \
+ mair |= MAIR_ATTR_SET(ATTR_NON_CACHEABLE, \
+ ATTR_NON_CACHEABLE_INDEX); \
+ write_mair_el##_el(mair); \
+ \
+ /* Invalidate TLBs at the current exception level */ \
+ _tlbi_fct(); \
+ \
+ /* Set TCR bits as well. */ \
+ /* Set T0SZ to (64 - width of virtual address space) */ \
+ int t0sz = 64 - __builtin_ctzll(PLAT_VIRT_ADDR_SPACE_SIZE);\
+ \
+ if ((flags & XLAT_TABLE_NC) != 0U) { \
+ /* Inner & outer non-cacheable non-shareable. */\
+ tcr = TCR_SH_NON_SHAREABLE | \
+ TCR_RGN_OUTER_NC | TCR_RGN_INNER_NC | \
+ ((uint64_t)t0sz << TCR_T0SZ_SHIFT); \
+ } else { \
+ /* Inner & outer WBWA & shareable. */ \
+ tcr = TCR_SH_INNER_SHAREABLE | \
+ TCR_RGN_OUTER_WBA | TCR_RGN_INNER_WBA | \
+ ((uint64_t)t0sz << TCR_T0SZ_SHIFT); \
+ } \
+ tcr |= _tcr_extra; \
+ write_tcr_el##_el(tcr); \
+ \
+ /* Set TTBR bits as well */ \
+ ttbr = (uint64_t) base_xlation_table; \
+ write_ttbr0_el##_el(ttbr); \
+ \
+ /* Ensure all translation table writes have drained */ \
+ /* into memory, the TLB invalidation is complete, */ \
+ /* and translation register writes are committed */ \
+ /* before enabling the MMU */ \
+ dsbish(); \
+ isb(); \
+ \
+ sctlr = read_sctlr_el##_el(); \
+ sctlr |= SCTLR_WXN_BIT | SCTLR_M_BIT; \
+ \
+ if ((flags & DISABLE_DCACHE) != 0U) \
+ sctlr &= ~SCTLR_C_BIT; \
+ else \
+ sctlr |= SCTLR_C_BIT; \
+ \
+ write_sctlr_el##_el(sctlr); \
+ \
+ /* Ensure the MMU enable takes effect immediately */ \
+ isb(); \
+ } \
+ \
+ void enable_mmu_direct_el##_el(unsigned int flags) \
+ { \
+ enable_mmu_el##_el(flags); \
+ }
+
+/* Define EL1 and EL3 variants of the function enabling the MMU */
+DEFINE_ENABLE_MMU_EL(1,
+ /*
+ * TCR_EL1.EPD1: Disable translation table walk for addresses
+ * that are translated using TTBR1_EL1.
+ */
+ TCR_EPD1_BIT | (tcr_ps_bits << TCR_EL1_IPS_SHIFT),
+ tlbivmalle1)
+DEFINE_ENABLE_MMU_EL(3,
+ TCR_EL3_RES1 | (tcr_ps_bits << TCR_EL3_PS_SHIFT),
+ tlbialle3)
diff --git a/lib/xlat_tables/xlat_tables_common.c b/lib/xlat_tables/xlat_tables_common.c
new file mode 100644
index 0000000..8b44df2
--- /dev/null
+++ b/lib/xlat_tables/xlat_tables_common.c
@@ -0,0 +1,417 @@
+/*
+ * Copyright (c) 2016-2018, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/cassert.h>
+#include <lib/utils.h>
+#include <lib/xlat_tables/xlat_tables.h>
+#include <plat/common/common_def.h>
+
+#include "xlat_tables_private.h"
+
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+#define LVL0_SPACER ""
+#define LVL1_SPACER " "
+#define LVL2_SPACER " "
+#define LVL3_SPACER " "
+#define get_level_spacer(level) \
+ (((level) == U(0)) ? LVL0_SPACER : \
+ (((level) == U(1)) ? LVL1_SPACER : \
+ (((level) == U(2)) ? LVL2_SPACER : LVL3_SPACER)))
+#define debug_print(...) printf(__VA_ARGS__)
+#else
+#define debug_print(...) ((void)0)
+#endif
+
+#define UNSET_DESC ~0ULL
+#define MT_UNKNOWN ~0U
+
+static uint64_t xlat_tables[MAX_XLAT_TABLES][XLAT_TABLE_ENTRIES]
+ __aligned(XLAT_TABLE_SIZE) __section(".xlat_table");
+
+static unsigned int next_xlat;
+static unsigned long long xlat_max_pa;
+static uintptr_t xlat_max_va;
+
+static uint64_t execute_never_mask;
+static uint64_t ap1_mask;
+
+/*
+ * Array of all memory regions stored in order of ascending base address.
+ * The list is terminated by the first entry with size == 0.
+ */
+static mmap_region_t mmap[MAX_MMAP_REGIONS + 1];
+
+
+void print_mmap(void)
+{
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+ debug_print("mmap:\n");
+ mmap_region_t *mm = mmap;
+ while (mm->size != 0U) {
+ debug_print(" VA:%p PA:0x%llx size:0x%zx attr:0x%x\n",
+ (void *)mm->base_va, mm->base_pa,
+ mm->size, mm->attr);
+ ++mm;
+ };
+ debug_print("\n");
+#endif
+}
+
+void mmap_add_region(unsigned long long base_pa, uintptr_t base_va,
+ size_t size, unsigned int attr)
+{
+ mmap_region_t *mm = mmap;
+ const mmap_region_t *mm_last = mm + ARRAY_SIZE(mmap) - 1U;
+ unsigned long long end_pa = base_pa + size - 1U;
+ uintptr_t end_va = base_va + size - 1U;
+
+ assert(IS_PAGE_ALIGNED(base_pa));
+ assert(IS_PAGE_ALIGNED(base_va));
+ assert(IS_PAGE_ALIGNED(size));
+
+ if (size == 0U)
+ return;
+
+ assert(base_pa < end_pa); /* Check for overflows */
+ assert(base_va < end_va);
+
+ assert((base_va + (uintptr_t)size - (uintptr_t)1) <=
+ (PLAT_VIRT_ADDR_SPACE_SIZE - 1U));
+ assert((base_pa + (unsigned long long)size - 1ULL) <=
+ (PLAT_PHY_ADDR_SPACE_SIZE - 1U));
+
+#if ENABLE_ASSERTIONS
+
+ /* Check for PAs and VAs overlaps with all other regions */
+ for (mm = mmap; mm->size; ++mm) {
+
+ uintptr_t mm_end_va = mm->base_va + mm->size - 1U;
+
+ /*
+ * Check if one of the regions is completely inside the other
+ * one.
+ */
+ bool fully_overlapped_va =
+ ((base_va >= mm->base_va) && (end_va <= mm_end_va)) ||
+ ((mm->base_va >= base_va) && (mm_end_va <= end_va));
+
+ /*
+ * Full VA overlaps are only allowed if both regions are
+ * identity mapped (zero offset) or have the same VA to PA
+ * offset. Also, make sure that it's not the exact same area.
+ */
+ if (fully_overlapped_va) {
+ assert((mm->base_va - mm->base_pa) ==
+ (base_va - base_pa));
+ assert((base_va != mm->base_va) || (size != mm->size));
+ } else {
+ /*
+ * If the regions do not have fully overlapping VAs,
+ * then they must have fully separated VAs and PAs.
+ * Partial overlaps are not allowed
+ */
+
+ unsigned long long mm_end_pa =
+ mm->base_pa + mm->size - 1;
+
+ bool separated_pa = (end_pa < mm->base_pa) ||
+ (base_pa > mm_end_pa);
+ bool separated_va = (end_va < mm->base_va) ||
+ (base_va > mm_end_va);
+
+ assert(separated_va && separated_pa);
+ }
+ }
+
+ mm = mmap; /* Restore pointer to the start of the array */
+
+#endif /* ENABLE_ASSERTIONS */
+
+ /* Find correct place in mmap to insert new region */
+ while ((mm->base_va < base_va) && (mm->size != 0U))
+ ++mm;
+
+ /*
+ * If a section is contained inside another one with the same base
+ * address, it must be placed after the one it is contained in:
+ *
+ * 1st |-----------------------|
+ * 2nd |------------|
+ * 3rd |------|
+ *
+ * This is required for mmap_region_attr() to get the attributes of the
+ * small region correctly.
+ */
+ while ((mm->base_va == base_va) && (mm->size > size))
+ ++mm;
+
+ /* Make room for new region by moving other regions up by one place */
+ (void)memmove(mm + 1, mm, (uintptr_t)mm_last - (uintptr_t)mm);
+
+ /* Check we haven't lost the empty sentinel from the end of the array */
+ assert(mm_last->size == 0U);
+
+ mm->base_pa = base_pa;
+ mm->base_va = base_va;
+ mm->size = size;
+ mm->attr = attr;
+
+ if (end_pa > xlat_max_pa)
+ xlat_max_pa = end_pa;
+ if (end_va > xlat_max_va)
+ xlat_max_va = end_va;
+}
+
+void mmap_add(const mmap_region_t *mm)
+{
+ const mmap_region_t *mm_cursor = mm;
+
+ while ((mm_cursor->size != 0U) || (mm_cursor->attr != 0U)) {
+ mmap_add_region(mm_cursor->base_pa, mm_cursor->base_va,
+ mm_cursor->size, mm_cursor->attr);
+ mm_cursor++;
+ }
+}
+
+static uint64_t mmap_desc(unsigned int attr, unsigned long long addr_pa,
+ unsigned int level)
+{
+ uint64_t desc;
+ int mem_type;
+
+ /* Make sure that the granularity is fine enough to map this address. */
+ assert((addr_pa & XLAT_BLOCK_MASK(level)) == 0U);
+
+ desc = addr_pa;
+ /*
+ * There are different translation table descriptors for level 3 and the
+ * rest.
+ */
+ desc |= (level == XLAT_TABLE_LEVEL_MAX) ? PAGE_DESC : BLOCK_DESC;
+ desc |= ((attr & MT_NS) != 0U) ? LOWER_ATTRS(NS) : 0U;
+ desc |= ((attr & MT_RW) != 0U) ? LOWER_ATTRS(AP_RW) : LOWER_ATTRS(AP_RO);
+ /*
+ * Always set the access flag, as this library assumes access flag
+ * faults aren't managed.
+ */
+ desc |= LOWER_ATTRS(ACCESS_FLAG);
+ desc |= ap1_mask;
+
+ /*
+ * Deduce shareability domain and executability of the memory region
+ * from the memory type.
+ *
+ * Data accesses to device memory and non-cacheable normal memory are
+ * coherent for all observers in the system, and correspondingly are
+ * always treated as being Outer Shareable. Therefore, for these 2 types
+ * of memory, it is not strictly needed to set the shareability field
+ * in the translation tables.
+ */
+ mem_type = MT_TYPE(attr);
+ if (mem_type == MT_DEVICE) {
+ desc |= LOWER_ATTRS(ATTR_DEVICE_INDEX | OSH);
+ /*
+ * Always map device memory as execute-never.
+ * This is to avoid the possibility of a speculative instruction
+ * fetch, which could be an issue if this memory region
+ * corresponds to a read-sensitive peripheral.
+ */
+ desc |= execute_never_mask;
+
+ } else { /* Normal memory */
+ /*
+ * Always map read-write normal memory as execute-never.
+ * This library assumes that it is used by software that does
+ * not self-modify its code, therefore R/W memory is reserved
+ * for data storage, which must not be executable.
+ *
+ * Note that setting the XN bit here is for consistency only.
+ * The function that enables the MMU sets the SCTLR_ELx.WXN bit,
+ * which makes any writable memory region to be treated as
+ * execute-never, regardless of the value of the XN bit in the
+ * translation table.
+ *
+ * For read-only memory, rely on the MT_EXECUTE/MT_EXECUTE_NEVER
+ * attribute to figure out the value of the XN bit.
+ */
+ if (((attr & MT_RW) != 0U) || ((attr & MT_EXECUTE_NEVER) != 0U)) {
+ desc |= execute_never_mask;
+ }
+
+ if (mem_type == MT_MEMORY) {
+ desc |= LOWER_ATTRS(ATTR_IWBWA_OWBWA_NTR_INDEX | ISH);
+ } else {
+ assert(mem_type == MT_NON_CACHEABLE);
+ desc |= LOWER_ATTRS(ATTR_NON_CACHEABLE_INDEX | OSH);
+ }
+ }
+
+ debug_print((mem_type == MT_MEMORY) ? "MEM" :
+ ((mem_type == MT_NON_CACHEABLE) ? "NC" : "DEV"));
+ debug_print(((attr & MT_RW) != 0U) ? "-RW" : "-RO");
+ debug_print(((attr & MT_NS) != 0U) ? "-NS" : "-S");
+ debug_print(((attr & MT_EXECUTE_NEVER) != 0U) ? "-XN" : "-EXEC");
+ return desc;
+}
+
+/*
+ * Look for the innermost region that contains the area at `base_va` with size
+ * `size`. Populate *attr with the attributes of this region.
+ *
+ * On success, this function returns 0.
+ * If there are partial overlaps (meaning that a smaller size is needed) or if
+ * the region can't be found in the given area, it returns MT_UNKNOWN. In this
+ * case the value pointed by attr should be ignored by the caller.
+ */
+static unsigned int mmap_region_attr(const mmap_region_t *mm, uintptr_t base_va,
+ size_t size, unsigned int *attr)
+{
+ /* Don't assume that the area is contained in the first region */
+ unsigned int ret = MT_UNKNOWN;
+
+ /*
+ * Get attributes from last (innermost) region that contains the
+ * requested area. Don't stop as soon as one region doesn't contain it
+ * because there may be other internal regions that contain this area:
+ *
+ * |-----------------------------1-----------------------------|
+ * |----2----| |-------3-------| |----5----|
+ * |--4--|
+ *
+ * |---| <- Area we want the attributes of.
+ *
+ * In this example, the area is contained in regions 1, 3 and 4 but not
+ * in region 2. The loop shouldn't stop at region 2 as inner regions
+ * have priority over outer regions, it should stop at region 5.
+ */
+ for ( ; ; ++mm) {
+
+ if (mm->size == 0U)
+ return ret; /* Reached end of list */
+
+ if (mm->base_va > (base_va + size - 1U))
+ return ret; /* Next region is after area so end */
+
+ if ((mm->base_va + mm->size - 1U) < base_va)
+ continue; /* Next region has already been overtaken */
+
+ if ((ret == 0U) && (mm->attr == *attr))
+ continue; /* Region doesn't override attribs so skip */
+
+ if ((mm->base_va > base_va) ||
+ ((mm->base_va + mm->size - 1U) < (base_va + size - 1U)))
+ return MT_UNKNOWN; /* Region doesn't fully cover area */
+
+ *attr = mm->attr;
+ ret = 0U;
+ }
+ return ret;
+}
+
+static mmap_region_t *init_xlation_table_inner(mmap_region_t *mm,
+ uintptr_t base_va,
+ uint64_t *table,
+ unsigned int level)
+{
+ assert((level >= XLAT_TABLE_LEVEL_MIN) &&
+ (level <= XLAT_TABLE_LEVEL_MAX));
+
+ unsigned int level_size_shift =
+ L0_XLAT_ADDRESS_SHIFT - level * XLAT_TABLE_ENTRIES_SHIFT;
+ u_register_t level_size = (u_register_t)1 << level_size_shift;
+ u_register_t level_index_mask =
+ ((u_register_t)XLAT_TABLE_ENTRIES_MASK) << level_size_shift;
+
+ debug_print("New xlat table:\n");
+
+ do {
+ uint64_t desc = UNSET_DESC;
+
+ if (mm->size == 0U) {
+ /* Done mapping regions; finish zeroing the table */
+ desc = INVALID_DESC;
+ } else if ((mm->base_va + mm->size - 1U) < base_va) {
+ /* This area is after the region so get next region */
+ ++mm;
+ continue;
+ }
+
+ debug_print("%s VA:%p size:0x%llx ", get_level_spacer(level),
+ (void *)base_va, (unsigned long long)level_size);
+
+ if (mm->base_va > (base_va + level_size - 1U)) {
+ /* Next region is after this area. Nothing to map yet */
+ desc = INVALID_DESC;
+ /* Make sure that the current level allows block descriptors */
+ } else if (level >= XLAT_BLOCK_LEVEL_MIN) {
+ /*
+ * Try to get attributes of this area. It will fail if
+ * there are partially overlapping regions. On success,
+ * it will return the innermost region's attributes.
+ */
+ unsigned int attr;
+ unsigned int r = mmap_region_attr(mm, base_va,
+ level_size, &attr);
+
+ if (r == 0U) {
+ desc = mmap_desc(attr,
+ base_va - mm->base_va + mm->base_pa,
+ level);
+ }
+ }
+
+ if (desc == UNSET_DESC) {
+ /* Area not covered by a region so need finer table */
+ uint64_t *new_table = xlat_tables[next_xlat];
+
+ next_xlat++;
+ assert(next_xlat <= MAX_XLAT_TABLES);
+ desc = TABLE_DESC | (uintptr_t)new_table;
+
+ /* Recurse to fill in new table */
+ mm = init_xlation_table_inner(mm, base_va,
+ new_table, level + 1U);
+ }
+
+ debug_print("\n");
+
+ *table++ = desc;
+ base_va += level_size;
+ } while ((base_va & level_index_mask) &&
+ ((base_va - 1U) < (PLAT_VIRT_ADDR_SPACE_SIZE - 1U)));
+
+ return mm;
+}
+
+void init_xlation_table(uintptr_t base_va, uint64_t *table,
+ unsigned int level, uintptr_t *max_va,
+ unsigned long long *max_pa)
+{
+ unsigned int el = xlat_arch_current_el();
+
+ execute_never_mask = xlat_arch_get_xn_desc(el);
+
+ if (el == 3U) {
+ ap1_mask = LOWER_ATTRS(AP_ONE_VA_RANGE_RES1);
+ } else {
+ assert(el == 1U);
+ ap1_mask = 0ULL;
+ }
+
+ init_xlation_table_inner(mmap, base_va, table, level);
+ *max_va = xlat_max_va;
+ *max_pa = xlat_max_pa;
+}
diff --git a/lib/xlat_tables/xlat_tables_private.h b/lib/xlat_tables/xlat_tables_private.h
new file mode 100644
index 0000000..cfecc39
--- /dev/null
+++ b/lib/xlat_tables/xlat_tables_private.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2016-2018, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef XLAT_TABLES_PRIVATE_H
+#define XLAT_TABLES_PRIVATE_H
+
+#include <platform_def.h>
+
+#include <lib/cassert.h>
+#include <lib/xlat_tables/xlat_tables_arch.h>
+
+#if HW_ASSISTED_COHERENCY
+#error xlat tables v2 must be used with HW_ASSISTED_COHERENCY
+#endif
+
+CASSERT(CHECK_PHY_ADDR_SPACE_SIZE(PLAT_PHY_ADDR_SPACE_SIZE),
+ assert_valid_phy_addr_space_size);
+
+/* Alias to retain compatibility with the old #define name */
+#define XLAT_BLOCK_LEVEL_MIN MIN_LVL_BLOCK_DESC
+
+void print_mmap(void);
+
+/* Returns the current Exception Level. The returned EL must be 1 or higher. */
+unsigned int xlat_arch_current_el(void);
+
+/*
+ * Returns the bit mask that has to be ORed to the rest of a translation table
+ * descriptor so that execution of code is prohibited at the given Exception
+ * Level.
+ */
+uint64_t xlat_arch_get_xn_desc(unsigned int el);
+
+void init_xlation_table(uintptr_t base_va, uint64_t *table,
+ unsigned int level, uintptr_t *max_va,
+ unsigned long long *max_pa);
+
+#endif /* XLAT_TABLES_PRIVATE_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 18:52:56 +0000