From 03861123d7ea0f031643afc0faa87027c58cbd11 Mon Sep 17 00:00:00 2001 From: Matthias Welwarsky Date: Fri, 16 Sep 2016 15:18:47 +0200 Subject: [PATCH] aarch64: remove armv7-a virt-to-phys code Page table layout in aarch64 is very different from armv7-a layout. Remove the incorrect handling, to be replaced correct armv8 code in a later patch Change-Id: I64c728a72a24f9f4177726ccc07a02a8ca0d56ce Signed-off-by: Matthias Welwarsky --- src/target/aarch64.c | 8 +--- src/target/armv8.c | 100 ++++++------------------------------------- src/target/armv8.h | 12 ++++++ 3 files changed, 27 insertions(+), 93 deletions(-) diff --git a/src/target/aarch64.c b/src/target/aarch64.c index 68de65d2..a2ed8b5f 100644 --- a/src/target/aarch64.c +++ b/src/target/aarch64.c @@ -2623,12 +2623,8 @@ static int aarch64_virt2phys(struct target *target, target_addr_t virt, if (retval != ERROR_OK) goto done; *phys = ret; - } else {/* use this method if armv8->memory_ap not selected - * mmu must be enable in order to get a correct translation */ - retval = aarch64_mmu_modify(target, 1); - if (retval != ERROR_OK) - goto done; - retval = armv8_mmu_translate_va_pa(target, virt, phys, 1); + } else { + LOG_ERROR("AAR64 processor not support translate va to pa"); } done: return retval; diff --git a/src/target/armv8.c b/src/target/armv8.c index fda51ef4..f7c6e31c 100644 --- a/src/target/armv8.c +++ b/src/target/armv8.c @@ -383,104 +383,30 @@ done: return retval; } +static int armv8_4K_translate(struct target *target, uint32_t va, uint32_t *val) +{ + LOG_ERROR("4K page Address translation need to add"); + return ERROR_FAIL; +} + /* method adapted to cortex A : reused arm v4 v5 method*/ int armv8_mmu_translate_va(struct target *target, uint32_t va, uint32_t *val) { - uint32_t first_lvl_descriptor = 0x0; - uint32_t second_lvl_descriptor = 0x0; - int retval; + int retval = ERROR_FAIL; struct armv8_common *armv8 = target_to_armv8(target); struct arm_dpm *dpm = armv8->arm.dpm; - uint32_t ttb = 0; /* default ttb0 */ - if (armv8->armv8_mmu.ttbr1_used == -1) - armv8_read_ttbcr(target); - if ((armv8->armv8_mmu.ttbr1_used) && - (va > (0xffffffff & armv8->armv8_mmu.ttbr0_mask))) { - /* select ttb 1 */ - ttb = 1; - } + retval = dpm->prepare(dpm); + retval += armv8_read_ttbcr(target); if (retval != ERROR_OK) goto done; - - /* MRC p15,0,,c2,c0,ttb */ - retval = dpm->instr_read_data_r0(dpm, - ARMV4_5_MRC(15, 0, 0, 2, 0, ttb), - &ttb); - if (retval != ERROR_OK) - return retval; - retval = armv8->armv8_mmu.read_physical_memory(target, - (ttb & 0xffffc000) | ((va & 0xfff00000) >> 18), - 4, 1, (uint8_t *)&first_lvl_descriptor); - if (retval != ERROR_OK) - return retval; - first_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *) - &first_lvl_descriptor); - /* reuse armv4_5 piece of code, specific armv8 changes may come later */ - LOG_DEBUG("1st lvl desc: %8.8" PRIx32 "", first_lvl_descriptor); - - if ((first_lvl_descriptor & 0x3) == 0) { - LOG_ERROR("Address translation failure"); - return ERROR_TARGET_TRANSLATION_FAULT; - } - - - if ((first_lvl_descriptor & 0x3) == 2) { - /* section descriptor */ - *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff); - return ERROR_OK; - } - - if ((first_lvl_descriptor & 0x3) == 1) { - /* coarse page table */ - retval = armv8->armv8_mmu.read_physical_memory(target, - (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10), - 4, 1, (uint8_t *)&second_lvl_descriptor); - if (retval != ERROR_OK) - return retval; - } else if ((first_lvl_descriptor & 0x3) == 3) { - /* fine page table */ - retval = armv8->armv8_mmu.read_physical_memory(target, - (first_lvl_descriptor & 0xfffff000) | ((va & 0x000ffc00) >> 8), - 4, 1, (uint8_t *)&second_lvl_descriptor); - if (retval != ERROR_OK) - return retval; - } - - second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *) - &second_lvl_descriptor); - - LOG_DEBUG("2nd lvl desc: %8.8" PRIx32 "", second_lvl_descriptor); - - if ((second_lvl_descriptor & 0x3) == 0) { - LOG_ERROR("Address translation failure"); - return ERROR_TARGET_TRANSLATION_FAULT; - } - - if ((second_lvl_descriptor & 0x3) == 1) { - /* large page descriptor */ - *val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff); - return ERROR_OK; - } - - if ((second_lvl_descriptor & 0x3) == 2) { - /* small page descriptor */ - *val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff); - return ERROR_OK; - } - - if ((second_lvl_descriptor & 0x3) == 3) { - *val = (second_lvl_descriptor & 0xfffffc00) | (va & 0x000003ff); - return ERROR_OK; - } - - /* should not happen */ - LOG_ERROR("Address translation failure"); - return ERROR_TARGET_TRANSLATION_FAULT; + if (armv8->page_size == 0) + return armv8_4K_translate(target, va, val); done: - return retval; + dpm->finish(dpm); + return ERROR_FAIL; } /* V8 method VA TO PA */ diff --git a/src/target/armv8.h b/src/target/armv8.h index b9e3f12e..884d39a3 100644 --- a/src/target/armv8.h +++ b/src/target/armv8.h @@ -228,6 +228,18 @@ target_to_armv8(struct target *target) #define CTI_GATE 0x140 #define CTI_UNLOCK 0xFB0 +#define PAGE_SIZE_4KB 0x1000 +#define PAGE_SIZE_4KB_LEVEL0_BITS 39 +#define PAGE_SIZE_4KB_LEVEL1_BITS 30 +#define PAGE_SIZE_4KB_LEVEL2_BITS 21 +#define PAGE_SIZE_4KB_LEVEL3_BITS 12 + +#define PAGE_SIZE_4KB_LEVEL0_MASK ((0x1FFULL) << PAGE_SIZE_4KB_LEVEL0_BITS) +#define PAGE_SIZE_4KB_LEVEL1_MASK ((0x1FFULL) << PAGE_SIZE_4KB_LEVEL1_BITS) +#define PAGE_SIZE_4KB_LEVEL2_MASK ((0x1FFULL) << PAGE_SIZE_4KB_LEVEL2_BITS) +#define PAGE_SIZE_4KB_LEVEL3_MASK ((0x1FFULL) << PAGE_SIZE_4KB_LEVEL3_BITS) + +#define PAGE_SIZE_4KB_TRBBASE_MASK 0xFFFFFFFFF000 int armv8_arch_state(struct target *target); int armv8_identify_cache(struct target *target); -- 2.39.5