From b11669a9567cb5c68c1e50f9548ff439346ffcd0 Mon Sep 17 00:00:00 2001 From: Pavel Pisa Date: Sun, 17 Jul 2016 18:50:18 +0200 Subject: arm/raspberrypi: reorder and update MMU config table to nor force RW section later to RO. Enable even the first megabyte of SDRAM to be cache-able after problems with stale cache content has been resolved by previous commit. Because major part of application usually fits to the first megabyte this speedups test dhrystone application by factor 40. Updates #2783 --- .../arm/raspberrypi/startup/mm_config_table.c | 31 +++++++++++++++------- 1 file changed, 22 insertions(+), 9 deletions(-) diff --git a/c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c b/c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c index 8a6d37a45a..50e19d85e1 100644 --- a/c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c +++ b/c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c @@ -23,31 +23,44 @@ #include #include +/* + * Pagetable initialization data + * + * Keep all read-only sections before read-write ones. + * This ensures that write is allowed if one page/region + * is partially filled by read-only section contentent + * and rest is used for writeable section + */ + const arm_cp15_start_section_config arm_cp15_start_mmu_config_table[] = { { .begin = (uint32_t) bsp_section_fast_text_begin, .end = (uint32_t) bsp_section_fast_text_end, .flags = ARMV7_MMU_CODE_CACHED - }, { - .begin = (uint32_t) bsp_section_fast_data_begin, - .end = (uint32_t) bsp_section_fast_data_end, - .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED }, { .begin = (uint32_t) bsp_section_start_begin, .end = (uint32_t) bsp_section_start_end, .flags = ARMV7_MMU_CODE_CACHED - }, { - .begin = (uint32_t) bsp_section_vector_begin, - .end = (uint32_t) bsp_section_vector_end, - .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED }, { .begin = (uint32_t) bsp_section_text_begin, .end = (uint32_t) bsp_section_text_end, - .flags = ARMV7_MMU_READ_WRITE + .flags = ARMV7_MMU_CODE_CACHED }, { .begin = (uint32_t) bsp_section_rodata_begin, .end = (uint32_t) bsp_section_rodata_end, .flags = ARMV7_MMU_DATA_READ_ONLY_CACHED + }, { + .begin = (uint32_t) bsp_translation_table_base, + .end = (uint32_t) bsp_translation_table_base + 0x4000, + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED + }, { + .begin = (uint32_t) bsp_section_fast_data_begin, + .end = (uint32_t) bsp_section_fast_data_end, + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED + }, { + .begin = (uint32_t) bsp_section_vector_begin, + .end = (uint32_t) bsp_section_vector_end, + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED }, { .begin = (uint32_t) bsp_section_data_begin, .end = (uint32_t) bsp_section_data_end, -- cgit v1.2.3