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bsp/riscv: Add device tree support

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Update #3433.
This commit is contained in:
Sebastian Huber
2018-06-22 08:01:48 +02:00
parent 2086948a7b
commit fe2cd01ba7
4 changed files with 27 additions and 6 deletions
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2
bsps/riscv/riscv/include/bsp.h
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@@ -44,6 +44,8 @@
extern "C" {
#endif
#define BSP_FDT_IS_SUPPORTED
/**
* @defgroup riscv_generic Register Definitions
*

18
bsps/riscv/riscv/start/start.S
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@@ -27,10 +27,11 @@
* SUCH DAMAGE.
*/
#include <bsp/linker-symbols.h>
#include <rtems/score/riscv-utility.h>
#include <rtems/score/cpu.h>
#include <rtems/asm.h>
#include <rtems/score/cpu.h>
#include <rtems/score/riscv-utility.h>
#include <bsp/linker-symbols.h>
#include <bspopts.h>
EXTERN(bsp_section_bss_begin)
EXTERN(bsp_section_bss_end)
@@ -57,12 +58,17 @@ SYM(_start):
bnez s0, .Lloop_forever
#endif
la t0, ISR_Handler
csrw mtvec, t0
/* load stack and frame pointers */
la sp, _Configuration_Interrupt_stack_area_end
#ifdef BSP_START_COPY_FDT_FROM_U_BOOT
mv a0, a1
call bsp_fdt_copy
#endif
la t0, ISR_Handler
csrw mtvec, t0
/* Clear .bss */
la a0, bsp_section_bss_begin
li a1, 0

1
c/src/lib/libbsp/riscv/riscv/Makefile.am
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@@ -39,6 +39,7 @@ librtemsbsp_a_SOURCES += ../../../../../../bsps/riscv/riscv/start/bsp_fatal_halt
# Shared
librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspfatal-default.c
librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/dev/getentropy/getentropy-cpucounter.c
librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bsp-fdt.c
librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/stackalloc.c
librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspgetworkarea-default.c

12
c/src/lib/libbsp/riscv/riscv/configure.ac
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@@ -15,6 +15,18 @@ RTEMS_CANONICAL_TARGET_CPU
AM_INIT_AUTOMAKE([no-define nostdinc foreign 1.12.2])
RTEMS_BSP_CONFIGURE
RTEMS_BSPOPTS_SET([BSP_START_COPY_FDT_FROM_U_BOOT],[*],[1])
RTEMS_BSPOPTS_HELP([BSP_START_COPY_FDT_FROM_U_BOOT],[copy the U-Boot provided FDT to an internal storage])
RTEMS_BSPOPTS_SET([BSP_FDT_BLOB_SIZE_MAX],[*],[65536])
RTEMS_BSPOPTS_HELP([BSP_FDT_BLOB_SIZE_MAX],[maximum size of the FDT blob in bytes])
RTEMS_BSPOPTS_SET([BSP_FDT_BLOB_READ_ONLY],[*],[1])
RTEMS_BSPOPTS_HELP([BSP_FDT_BLOB_READ_ONLY],[place the FDT blob into the read-only data area])
RTEMS_BSPOPTS_SET([BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA],[*],[1])
RTEMS_BSPOPTS_HELP([BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA],[copy the FDT blob into the read-only load area via bsp_fdt_copy()])
RTEMS_BSP_CLEANUP_OPTIONS
case "${RTEMS_BSP}" in