[driver] longanpi-4b support dram init

board/longanpi-4b/CMakeLists.txt

@@ -2,6 +2,9 @@ set(APP_COMMON_SOURCE
     ${CMAKE_CURRENT_SOURCE_DIR}/start.S 
     ${CMAKE_CURRENT_SOURCE_DIR}/board.c
     ${CMAKE_CURRENT_SOURCE_DIR}/eabi_compat.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/payloads/init_dram_bin.c
 )
 
 add_subdirectory(hello_world)
+
+add_subdirectory(init_dram)

board/longanpi-4b/init_dram/CMakeLists.txt

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
+add_syterkit_app(init_dram 
+    main.c
+)

board/longanpi-4b/init_dram/main.c

@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <time.h>
+#include <types.h>
+
+#include <log.h>
+
+#include <common.h>
+
+#include <pmu/axp.h>
+#include <sys-dram.h>
+#include <sys-i2c.h>
+
+extern sunxi_serial_t uart_dbg;
+
+int main(void) {
+    sunxi_serial_init(&uart_dbg);
+
+    show_banner();
+
+    sunxi_clk_init();
+
+    sunxi_clk_dump();
+
+    mdelay(30); /* Delay 300ms for pmu bootup */
+
+    printk(LOG_LEVEL_INFO, "DRAM: DRAM Size = %dMB\n", sunxi_dram_init(NULL));
+
+    sunxi_clk_dump();
+
+    int i = 0;
+
+    while (1) {
+        i++;
+        printk(LOG_LEVEL_INFO, "Count: %d\n", i);
+        mdelay(1000);
+    }
+
+    abort();
+
+    return 0;
+}

cmake/board/longanpi-4b.cmake

@@ -9,7 +9,7 @@ set(CONFIG_BOARD_LONGANPI-4B True)
 add_definitions(-DCONFIG_CHIP_SUN55IW3)
 
 set(CONFIG_USE_DRAM_PAYLOAD True)
-set(CONFIG_USE_PREBUILT_DRAM_PAYLOAD False)
+set(CONFIG_USE_PREBUILT_DRAM_PAYLOAD True)
 set(CONFIG_USE_DRAM_PAYLOAD_SOURCE_PATH "${CMAKE_SOURCE_DIR}/payloads/sun55iw3_libdram")
 set(CONFIG_USE_DRAM_PAYLOAD_BIN_PATH "${CONFIG_USE_DRAM_PAYLOAD_SOURCE_PATH}/output/ddr.bin")
 set(CONFIG_USE_DRAM_PAYLOAD_FILE_PATH "${CMAKE_SOURCE_DIR}/board/longanpi-4b/payloads/init_dram_bin.c")

src/drivers/sun55iw3/CMakeLists.txt

@@ -2,4 +2,5 @@
 
 add_library(chip_drivers-obj OBJECT
     sys-clk.c
+    sys-dram.c
 )

src/drivers/sun55iw3/sys-dram.c

@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <barrier.h>
+#include <io.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <types.h>
+
+#include <jmp.h>
+#include <log.h>
+
+#include <sys-dram.h>
+#include <sys-rtc.h>
+
+#define INIT_DRAM_BIN_BASE 0x38000
+
+extern uint8_t __ddr_bin_start[];
+extern uint8_t __ddr_bin_end[];
+
+uint64_t sunxi_dram_init(void *para) {
+    uint8_t *src = __ddr_bin_start;
+    uint8_t *dst = (uint8_t *) INIT_DRAM_BIN_BASE;
+
+    printk(LOG_LEVEL_DEBUG, "DRAM: load dram init from 0x%08x -> 0x%08x size: %08x\n", src, dst, __ddr_bin_end - __ddr_bin_start);
+    memcpy(dst, src, __ddr_bin_end - __ddr_bin_start);
+
+    printk(LOG_LEVEL_DEBUG, "DRAM: Now jump to 0x%08x run DRAMINIT\n", dst);
+
+    __asm__ __volatile__("isb sy"
+                         :
+                         :
+                         : "memory");
+    __asm__ __volatile__("dsb sy"
+                         :
+                         :
+                         : "memory");
+    __asm__ __volatile__("dmb sy"
+                         :
+                         :
+                         : "memory");
+    ((void (*)(void)) ((void *) INIT_DRAM_BIN_BASE))();
+
+    return 0;
+}