From b2dc1af59a4cead2bd9446256ef31658b2a5de61 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Daniel=20Gl=C3=B6ckner?= Date: Thu, 20 Nov 2014 23:57:26 +0100 Subject: [PATCH] armv7a: fix interpretation of MMU table MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit On armv7 there no longer are 1kB pages. Instead the bit that in older architectures distinguished 1kB pages from 4kB pages is on armv7 used for as execute-never marker. There may now also be 16MB supersections with 40 bit physical address. Change-Id: I959bdb8012782a9d07d968907a21f50e3d9b356a Signed-off-by: Daniel Glöckner Reviewed-on: http://openocd.zylin.com/2386 Tested-by: jenkins Reviewed-by: Vladimir Svoboda Reviewed-by: Paul Fertser --- src/target/armv7a.c | 46 +++++++++++++++++---------------------------- 1 file changed, 17 insertions(+), 29 deletions(-) diff --git a/src/target/armv7a.c b/src/target/armv7a.c index ca599eb6..170cfcc2 100644 --- a/src/target/armv7a.c +++ b/src/target/armv7a.c @@ -232,27 +232,26 @@ int armv7a_mmu_translate_va(struct target *target, uint32_t va, uint32_t *val) } - if ((first_lvl_descriptor & 0x3) == 2) { + if ((first_lvl_descriptor & 0x40002) == 2) { /* section descriptor */ *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff); return ERROR_OK; + } else if ((first_lvl_descriptor & 0x40002) == 0x40002) { + /* supersection descriptor */ + if (first_lvl_descriptor & 0x00f001e0) { + LOG_ERROR("Physical address does not fit into 32 bits"); + return ERROR_TARGET_TRANSLATION_FAULT; + } + *val = (first_lvl_descriptor & 0xff000000) | (va & 0x00ffffff); + return ERROR_OK; } - if ((first_lvl_descriptor & 0x3) == 1) { - /* coarse page table */ - retval = armv7a->armv7a_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 = armv7a->armv7a_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; - } + /* page table */ + retval = armv7a->armv7a_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; second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *) &second_lvl_descriptor); @@ -267,23 +266,12 @@ int armv7a_mmu_translate_va(struct target *target, uint32_t va, uint32_t *val) 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) { + } else { /* 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; + return ERROR_OK; done: return retval; -- 2.39.5