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authorPavel Pisa <pisa@cmp.felk.cvut.cz>2016-07-17 18:50:18 +0200
committerPavel Pisa <pisa@cmp.felk.cvut.cz>2016-07-20 16:46:04 +0200
commitdcf806ef51f1b6893e47d19a5d36becde4df9273 (patch)
tree5613b7c58cfb6ece6eb0c1cbae0ad12d4f5cf175
parentarm/raspberrypi: use cache manager operations to flush/invalidate all cache l... (diff)
downloadrtems-dcf806ef51f1b6893e47d19a5d36becde4df9273.tar.bz2
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.
-rw-r--r--c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c31
1 files 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
@@ -23,32 +23,45 @@
#include <bsp.h>
#include <bsp/arm-cp15-start.h>
+/*
+ * 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,
.flags = ARMV7_MMU_DATA_READ_WRITE_CACHED