bsp/beagle: Add FDT support for Beaglebone Black

c/src/lib/libbsp/arm/beagle/Makefile.am

@@ -76,6 +76,7 @@ libbsp_a_LIBADD =
 
 # Shared
 libbsp_a_SOURCES += ../../shared/bootcard.c
+libbsp_a_SOURCES += ../../shared/src/bsp-fdt.c
 libbsp_a_SOURCES += ../../shared/bspclean.c
 libbsp_a_SOURCES += ../../shared/bspgetworkarea.c
 libbsp_a_SOURCES += ../../shared/bsppredriverhook.c

c/src/lib/libbsp/arm/beagle/configure.ac

@@ -18,6 +18,15 @@ RTEMS_PROG_CC_FOR_TARGET
 RTEMS_CANONICALIZE_TOOLS
 RTEMS_PROG_CCAS
 
+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],[*],[262144])
+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([IS_DM3730],[beagleboard*],[1])
 RTEMS_BSPOPTS_HELP([IS_DM3730],[true if SOC is DM3730])
 

c/src/lib/libbsp/arm/beagle/include/bsp.h

@@ -187,6 +187,10 @@ static inline void flush_data_cache(void)
 #define BSP_GPIO_PINS_PER_BANK 32
 #endif
 
+#if BSP_START_COPY_FDT_FROM_U_BOOT
+#define BSP_FDT_IS_SUPPORTED
+#endif
+
 /* i2c stuff */
 typedef struct {
     uint32_t rx_or_tx;
@@ -357,4 +361,4 @@ static inline void write_ttbr0(uint32_t bar)
  */
 BSP_START_TEXT_SECTION void beagle_setup_mmu_and_cache(void);
 
-#endif /* LIBBSP_ARM_BEAGLE_BSP_H */
+#endif /* LIBBSP_ARM_BEAGLE_BSP_H */

c/src/lib/libbsp/arm/beagle/startup/bspstart.c

@@ -15,6 +15,7 @@
 #include <bsp.h>
 #include <bsp/bootcard.h>
 #include <bsp/irq-generic.h>
+#include <bsp/fdt.h>
 
 void bsp_start(void)
 {
@@ -27,3 +28,8 @@ void bsp_start(void)
   bsp_interrupt_initialize();
   printk("\nRTEMS Beagleboard: %s\n", type);
 }
+
+uint32_t bsp_fdt_map_intr(uint32_t intr)
+{
+  return intr;
+}

c/src/lib/libbsp/arm/shared/start/start.S

@@ -183,6 +183,11 @@ _start:
 	bl bsp_start_init_registers_core
 #endif
 
+#ifdef BSP_START_COPY_FDT_FROM_U_BOOT
+	mov	r0, r6
+	bl bsp_fdt_copy
+#endif
+
 #ifdef RTEMS_SMP
 	/* Read MPIDR and get current processor index */
 	mrc	p15, 0, r0, c0, c0, 5