[PATCH 3/3] MMU support for RaspberryPi BSP
Hesham AL-Matary
heshamelmatary at gmail.com
Mon Sep 16 16:20:49 UTC 2013
---
c/src/lib/libbsp/arm/raspberrypi/Makefile.am | 9 ++-
c/src/lib/libbsp/arm/raspberrypi/preinstall.am | 8 +++
.../libbsp/arm/raspberrypi/startup/bspstarthooks.c | 22 +------
c/src/lib/libbsp/arm/raspberrypi/startup/linkcmds | 4 +-
.../arm/raspberrypi/startup/mm_config_table.c | 70 ++++++++++++++++++++++
5 files changed, 92 insertions(+), 21 deletions(-)
create mode 100644 c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c
diff --git a/c/src/lib/libbsp/arm/raspberrypi/Makefile.am b/c/src/lib/libbsp/arm/raspberrypi/Makefile.am
index 24d396c..a06979a 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/Makefile.am
+++ b/c/src/lib/libbsp/arm/raspberrypi/Makefile.am
@@ -27,6 +27,7 @@ nodist_include_HEADERS = ../../shared/include/coverhd.h \
nodist_include_bsp_HEADERS = ../../shared/include/bootcard.h
include_bsp_HEADERS =
+include_bsp_HEADERS += ../../../libbsp/shared/include/mm.h
include_bsp_HEADERS += ../../shared/include/utility.h
include_bsp_HEADERS += ../../shared/include/irq-generic.h
include_bsp_HEADERS += ../../shared/include/irq-info.h
@@ -35,6 +36,7 @@ include_bsp_HEADERS += ../../shared/include/uart-output-char.h
include_bsp_HEADERS += ../../shared/tod.h
include_bsp_HEADERS += ../shared/include/linker-symbols.h
include_bsp_HEADERS += ../shared/include/start.h
+include_bsp_HEADERS += ../shared/include/arm-cp15-start.h
include_bsp_HEADERS += ../shared/lpc/include/lpc-timer.h
include_bsp_HEADERS += ../shared/lpc/include/lpc-dma.h
include_bsp_HEADERS += include/irq.h
@@ -83,7 +85,7 @@ libbsp_a_SOURCES += ../../shared/sbrk.c
libbsp_a_SOURCES += ../../shared/src/stackalloc.c
libbsp_a_SOURCES += ../shared/abort/simple_abort.c
libbsp_a_SOURCES += ../shared/startup/bsp-start-memcpy.S
-
+libbsp_a_SOURCES += ../shared/arm-cp15-set-ttb-entries.c
# Startup
libbsp_a_SOURCES += startup/bspreset.c
@@ -91,6 +93,7 @@ libbsp_a_SOURCES += startup/bspstart.c
# IRQ
libbsp_a_SOURCES += ../../shared/src/irq-default-handler.c
+libbsp_a_SOURCES += ../shared/arm-cp15-set-exception-handler.c
libbsp_a_SOURCES += ../../shared/src/irq-generic.c
libbsp_a_SOURCES += ../../shared/src/irq-info.c
libbsp_a_SOURCES += ../../shared/src/irq-legacy.c
@@ -127,6 +130,10 @@ libbsp_a_CPPFLAGS += -I$(srcdir)/../../../libcpu/arm/shared/include
# Start hooks
libbsp_a_SOURCES += startup/bspstarthooks.c
+# LIBMM
+libbsp_a_SOURCES += startup/mm_config_table.c
+libbsp_a_SOURCES += ../shared/mminit.c
+
###############################################################################
# Network #
###############################################################################
diff --git a/c/src/lib/libbsp/arm/raspberrypi/preinstall.am b/c/src/lib/libbsp/arm/raspberrypi/preinstall.am
index 056c5f1..a638e64 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/preinstall.am
+++ b/c/src/lib/libbsp/arm/raspberrypi/preinstall.am
@@ -62,6 +62,10 @@ $(PROJECT_INCLUDE)/bsp/bootcard.h: ../../shared/include/bootcard.h $(PROJECT_INC
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/bootcard.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/bootcard.h
+$(PROJECT_INCLUDE)/bsp/mm.h: ../../../libbsp/shared/include/mm.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/mm.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/mm.h
+
$(PROJECT_INCLUDE)/bsp/utility.h: ../../shared/include/utility.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/utility.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/utility.h
@@ -94,6 +98,10 @@ $(PROJECT_INCLUDE)/bsp/start.h: ../shared/include/start.h $(PROJECT_INCLUDE)/bsp
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/start.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/start.h
+$(PROJECT_INCLUDE)/bsp/arm-cp15-start.h: ../shared/include/arm-cp15-start.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/arm-cp15-start.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/arm-cp15-start.h
+
$(PROJECT_INCLUDE)/bsp/lpc-timer.h: ../shared/lpc/include/lpc-timer.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/lpc-timer.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/lpc-timer.h
diff --git a/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c b/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
index a224168..71b2ff1 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
+++ b/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
@@ -7,6 +7,7 @@
*/
/*
+ * Copyright (c) 2013. Hesham AL-Matary
* Copyright (c) 2013 by Alan Cudmore
* based on work by:
* Copyright (c) 2009
@@ -24,33 +25,16 @@
#include <bspopts.h>
#include <bsp/start.h>
#include <bsp/raspberrypi.h>
-#include <bsp/mmu.h>
-
-static void BSP_START_TEXT_SECTION raspberrypi_cache_setup(void)
-{
- uint32_t ctrl = 0;
-
- /* Disable MMU and cache, basic settings */
- ctrl = arm_cp15_get_control();
- ctrl &= ~(ARM_CP15_CTRL_I | ARM_CP15_CTRL_R | ARM_CP15_CTRL_C
- | ARM_CP15_CTRL_V | ARM_CP15_CTRL_M);
- ctrl |= ARM_CP15_CTRL_S;
- arm_cp15_set_control(ctrl);
-
- arm_cp15_cache_invalidate();
- arm_cp15_tlb_invalidate();
-
-}
-
+#include <bsp/mm.h>
void BSP_START_TEXT_SECTION bsp_start_hook_0(void)
{
- raspberrypi_cache_setup();
}
void BSP_START_TEXT_SECTION bsp_start_hook_1(void)
{
bsp_start_copy_sections();
+ bsp_memory_management_initialize();
bsp_start_clear_bss();
}
diff --git a/c/src/lib/libbsp/arm/raspberrypi/startup/linkcmds b/c/src/lib/libbsp/arm/raspberrypi/startup/linkcmds
index b9a0dd8..c12b348 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/startup/linkcmds
+++ b/c/src/lib/libbsp/arm/raspberrypi/startup/linkcmds
@@ -35,7 +35,8 @@
MEMORY {
VECTOR_RAM (AIW) : ORIGIN = 0x0 , LENGTH = 0x8000
- RAM (AIW) : ORIGIN = 0x00008000, LENGTH = 128M - 0x8000
+ RAM (AIW) : ORIGIN = 0x00008000, LENGTH = 128M - 48K
+ RAM_MMU (AIW) : ORIGIN = 128M - 16k, LENGTH = 16k
}
REGION_ALIAS ("REGION_START", RAM);
@@ -58,5 +59,6 @@ bsp_stack_irq_size = DEFINED (bsp_stack_irq_size) ? bsp_stack_irq_size : 4096;
bsp_stack_abt_size = DEFINED (bsp_stack_abt_size) ? bsp_stack_abt_size : 1024;
bsp_section_robarrier_align = DEFINED (bsp_section_robarrier_align) ? bsp_section_robarrier_align : 1M;
+bsp_translation_table_base = ORIGIN (RAM_MMU);
INCLUDE linkcmds.armv4
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
new file mode 100644
index 0000000..fd85513
--- /dev/null
+++ b/c/src/lib/libbsp/arm/raspberrypi/startup/mm_config_table.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2013 embedded brains GmbH. All rights reserved.
+ *
+ * embedded brains GmbH
+ * Dornierstr. 4
+ * 82178 Puchheim
+ * Germany
+ * <info at embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#include <bsp/start.h>
+#include <bsp/arm-cp15-start.h>
+
+#ifdef RTEMS_SMP
+ #define MMU_DATA_READ_WRITE ARMV7_MMU_DATA_READ_WRITE_SHAREABLE
+#else
+ #define MMU_DATA_READ_WRITE ARMV7_MMU_DATA_READ_WRITE_CACHED
+#endif
+
+BSP_START_DATA_SECTION const arm_cp15_start_section_config
+bsp_mm_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 = MMU_DATA_READ_WRITE
+ }, {
+ .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 = MMU_DATA_READ_WRITE
+ }, {
+ .begin = (uint32_t) bsp_section_text_begin,
+ .end = (uint32_t) bsp_section_text_end,
+ .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_section_data_begin,
+ .end = (uint32_t) bsp_section_data_end,
+ .flags = MMU_DATA_READ_WRITE
+ }, {
+ .begin = (uint32_t) bsp_section_bss_begin,
+ .end = (uint32_t) bsp_section_bss_end,
+ .flags = MMU_DATA_READ_WRITE
+ }, {
+ .begin = (uint32_t) bsp_section_work_begin,
+ .end = (uint32_t) bsp_section_work_end,
+ .flags = MMU_DATA_READ_WRITE
+ }, {
+ .begin = (uint32_t) bsp_section_stack_begin,
+ .end = (uint32_t) bsp_section_stack_end,
+ .flags = MMU_DATA_READ_WRITE
+ }
+};
+
+BSP_START_DATA_SECTION const size_t bsp_mm_config_table_size =
+RTEMS_ARRAY_SIZE(&bsp_mm_config_table);
--
1.8.3.1
More information about the devel
mailing list